Dated on August, 10

XXIII CONFERENCE «ALUMINIUM OF SIBERIA»

Alumina production

Chairman: Andrey PANOV (UC RUSAL)
• Safety transfer of bauxite slurry and red mud in the alumina production process (Thoralf Rassmann,FELUWA Pumpen GmbH)

Metallurgical extraction processes are associated with enormous amounts of slurries and waste materials that require safe transfer and safe disposal.
In the majority of cases diaphragm piston pumps are applied for such duties.
FELUWA pumps provide for the environmentally friendly transportation of red mud and other tailings at solids concentrations of up to 70 % with associated high efficiency as well as low power and wear.

• Study of crystal growth of recycled soda at BAZ refinery (A.V. Perestoronin, RUSAL ETC)

 

• Full-scale experiment on joint bauxite and sinter leaching at “BAZ-SUAL”– conclusions (A.N. Fedyaev, RUSAL VAMI)

 

• Prospects of reserve raw material base for Achinsk refinery – Goryachegorsk deposit (S.A. Vinogradov, RUSAL ETC)

 

• Improvement of technology for gallium production from spent liquors of alumina refineries (A.A. Damaskin, RUSAL ETC)

 

• Special features of sample preparation and analysis of trace impurities in smelter grade alumina incl. sulphur, thallium, gallium, lithium, beryllium, zinc (T.G. Golovanova, RUSAL ETC)

 

• Implementation of advanced process control system (APC) at calcination area of JSC “RUSAL Achinsk” (D.G. Shupyatskiy, RUSAL ETC)

 

• Applicability of mathematical model of JSC “RUSAL Achinsk” to increase the production efficiency of alumina and soda products (D.G.Chistyakov, RUSAL ETC)

 

• Use of computerized fluid dynamics for revamp of head thickener at Achinsk refinery (RUSAL ETC)

 

• Specific features of Scandium behaviour during sodium bicarbonate digestion of red mud (A.G. Suss, RUSAL ETC)

 

• Specific features of Dian-Dian bauxite processing incl. boehmite reversion issue (A.G. Suss, RUSAL ETC)

 

• New approaches in preparation and enrichment of high-silica aluminum raw materials (A.O Mezenin, Mekhanobr-Tekhnika Research and Engineering Corporation JSC)

 

• Hydrothermal Hydrolysis of Alumochloride Solutions (N.M. Dobrynkin, Boreskov Institute of Catalysis SB RAS)

The process of hydrothermal synthesis of Al2O3, AlO(OH) and Fe2O3 by decomposition of chloride solutions at 453-483K and P=1.6-2.3 MPa was studied. The proposed method of hydrothermal hydrolysis allows one to carry out the stages of formation of oxyproducts of both aluminum and iron completely. The conditions for controlling the formation of oxide materials with a specified structure are established.

• Ecotoxicological researches of technogenic materials of aluminous production (I.I.Shepelev, " EКО-ENGINEERING " Research Company)

 

• Alternative ways of utilization of dust of gas-purifying constructions of aluminous production (I.I.Shepelev, " EКО-ENGINEERING " Research Company)

 

• Alumina Refinery Company Ltd. in reducing heat input by means of implementation of production efficiency modeling (D.Yu. Kashyrov, Mykolayiv Alumina Refinery Co. Ltd)

 

• Trials of new types of reducing agents in slurry charge at Pavlodar Alumina plant (D.D. Dauletov, «Research and Engineering Center ERG», LLP)

Experimental and technological studies of three types of reducing agent in slurry mixture of Pavlodar Alumina Plant:
1. Special coke is produced by JSC "Shubarkol komir" with a size from 0-10 mm;
2. Coke of oil production by «Pavlodar Oil Chemistry Refinery» LLP ;
3. Coke breeze is produced by JSC "Arcelor Mittal Temirtau" fr.- 0-10 mm;
The purpose of the tests was to determine the technological feasibility of using various types of coke as a reducing agent in a batch of sintering and determining their optimal dosage in a charge that affects the extraction of useful components from the cake.

• Design of a computer model rotary kiln for sintering nepheline mixture (A. V. Alexandrov, RUSAL ETC)

Created a computer model of a rotary kiln for sintering of nepheline charge. Using the developed computer model of a tubular rotary kiln, the effect of various structural upgrades on the extent of the cooling zone was evaluated and ways of increasing the extent of the cooling zone to form the optimum phase composition of the nepheline sinter were proposed.

• Energy-saving technology of batch preparation for alumina production (M.A. Seredkin, Siberian federal university)

 

SYMPOSIUM IN HONOR OF PROFESSOR V.M. SIZYAKOV «Complex processing of aluminium raw materials»

• Current development stage of the leading scientific school of metallurgists of the Mining University (V.M. Sizyakov, St. Petersburg Mining University)

The characteristic of the current development stage of the leading scientific school of metallurgists of the Mining University is given. The directions of the development of the leadings scientific school, the main technical researches and their implementation, also the main scientific results obtained by the team of the scientific school are shown.

• Processing of high-silica aluminum raw materials using low-grade process fuel (V.N. Brichkin, St. Petersburg Mining University)

 

• On the creative path of Professor V.M. Sizyakov (E.V. Sizyakova, St. Petersburg Mining University)

The article is devoted to the professional activity of the St. Petersburg Mining University professor, Honored Scientist of the Russian Federation Viktor Mikhailovich Sizyakov, who celebrates his 80th birthday in 2017.

• Research of the process TKGA precipitation and its conversion with production of low-modulus aluminate solutions (V.V. Vasiliev, St. Petersburg Mining University)

 

• Conditioning and modification composition of the sludge of alumina production to increase efficiency of their disposal (R.V. Kurtenkov, St. Petersburg Mining University)

 

Aluminium Reduction Technology

Chairs: Viktor Buzunov (UC RUSAL)
Peter Polyakov, prof, dr. (SFU)

• Analysis of scientific and technical achievements in the aluminium industry (TMS 2017 materials) (P.Polyakov, SFU)

 

• RA-550 - a new stage in development of UC RUSAL technology (A. Zavadyak, RUSAL-ETC)

 

• How to minimize the carbon footprint from aluminium smelters (Halvor Kvande, Norwegian University of Science and Technology)

The paper will discuss the possibilities for minimization of the CO2 emissions from the global aluminium production. The processes from bauxite mine to aluminum ingot will be included in the discussion. From a global perspective the major CO2 emissions come from the electric energy production based on fossil fuels, so reduced energy consumption is also of great importance.

• Studies on waste heat recovery in aluminum electrolysis (Zhaowen Wang, Institute of Light Metals Metallurgy, School of Metallurgy, Northeastern University)

 

• The solution behavior of alumina in aluminum electrolysis (Gao B., Institute of Light Metals Metallurgy, School of Metallurgy, Northeastern University)

By using the see-through cell, the dissolution phenomenon of alumina in the cryolite electrolyte was clearly visible. In this paper, the dissolution processes of primary and secondary alumina in typical aluminum bath were compared as well as the temperature fluctuations during dissolution. Initial results shows that the dissolution of primary alumina can be divided into a few key steps: fast dissolution upon feeding, crust formation and sludge dissolution. And the dissolution rate in each step is very different. Secondary alumina displays a quite different dissolution behavior from primary alumina. Meanwhile, the dissolution rate of secondary alumina is much faster than that of primary alumina. The mechanism for alumina dissolution under the influences of MOI, LOI, surface area, absorbed fluorine and carbon content were also discussed.

• Consequences of Poor Material Choices in Potlinings (Richard Jeltsch, Jeltsch Consulting)

Pot lining is one of the most significant of the variable costs of smelter operation and a major part of the initial set up of a new smelter. There is a wide range of products of varying quality and price that are offered on the market as suitable for use in the pots. When choosing these products it is important to evaluate the long term costs to the plant, not just the immediate pricing of the materials. The paper describes the consequences of choosing low quality materials with illustrations drawn from autopsies of cells from a wide range of technologies. A process for screening suppliers and testing products for quality is discussed.

• DX+ Ultra technology – from design to Industrialization (Abdalla Alzarooni, Emirates Global Aluminium)

 

• Response of cryolitic bath to the heat balance shifts in the aluminium electrolysis smelting cell (Jingjing Liu, The University of Auckland, Light Metals Research Center)

 

• Bags with differentiable filtering area to upgrade dry gas scrubbing systems for electrolytic production of aluminum (A.G. Bernyatsky, RUSAL ETC)

 

• Technical Measures for Increasing the Life of Pots in ALRO Slatina (Marian Cilianu, ALRO)

Design changes performed over the years at the ALRO’s electrolysis pots, along with the amperage increase and improvement of the pots operational procedures, have led to the achievement of amazing results in the electrolysis process.
Aiming to design a high performance pot technology, with high productivity and low capital expenditures, ALRO has redesigned its low-amperage pots in order to create an advanced pot, by integrating the latest technology in lining design and anode rodding, in such a way as to maximize the pot production by amperage increase, without any decrease of the technical performances and pot life; thus obtaining an increase of the potlife from 1,440 days in 2004 to 2,860 days in 2016, a decrease of the reactive power consumption, in direct current, from 14.18 MWh/Mt to 13.28 MWh/Mt and increase of the current efficiency from 92.3% to 95.7%.

• Increasing of energy effectiveness of UC RUSAL cells (G. Arkhipov, RUSAL ETC)

 

• Experience of technology for reducing vanadium and titanium content in primary aluminium using boron compounds addition to the cells on Kandalaksha aluminium smelter (S. Irgaleev, RUSAL ETC)

 

• Extension of service life of aluminum electrolysis cell through a local hot repairing method of the cathode bottom (G. Nagibin, SFU)

The main objective of the present work is to develop the cost-effective method of hot repairing of local damages of the bottom of the aluminum electrolysis cell. The technology of preparation of magnesium oxide or aluminum oxide with synthesized TiB2-С composite coating used as a repair material was developed. The results of this investigation are very promising for reducing cathode wear and increasing the lifetime of the aluminum electrolysis cell.

• New x-ray methods of operational control of electrolyte aluminum production different compositions (I.Yakimov, SFU)

The capabilities, accuracy and economic efficiency of traditional and new methods of monitoring the composition of electrolyte with different additives (Cа,K,Mg,Li) is discussed. The methods are divided into x-ray diffraction and x-ray fluorescence, and calibration and standardless methods. The problem of preparation of standard samples of chemical and phase composition for calibration methods is considered. The expediency of complex analysis by a group of methods is discussed.

• Waste heat recovery of aluminum smelter potrooms to heat “KraMZEnergo” boiler feed water (Y. Storozhev, SFU)

An effective method of heat recovery is the use of heat exchangers. OJSC "RUSAL-Krasnoyarsk" basically has electrolyzers with self-baking anodes. The exhaust gases of the electrolysis shop contain a considerable amount of resinous substances. The temperature of the gases in summer is 130 ° C. One shop corresponds to 80 thousand cubic meters of emissions per hour. This amount of heat can be utilized for heating the feedwater of the boiler plant “KraMZEnergo”. Based on the equations of convective heat transfer and heat transfer, a gas-water tubular heat exchanger is calculated, which allows heating the feed water to 35-40 ° C in an amount of 267 tons per day from one brigade of electrolysers. In accordance with the calculated heat exchange surface area, a 4-section gas-water heat exchanger of the pipe-in-pipe type was designed. In this heat exchanger, feedwater flows into the annular space, and anode gases from the gas supply network of the brigade of electrolytic cells of the KrAZ electrolysis shop are fed into the tube space. The design of the heat exchanger allows it to be cleaned from tarry deposits when removing end caps. For transportation of the coolant to the boiler house "KraMZEnergo", a pipeline of an underground gasket, buried at 2 m.
Based on 8 electrolytic shops of KrAZ, 93514 Gcal / year will be utilized for water heating, and 23,384 tons of coal will be saved on the KraMZenergo boiler station and the release of 37,448 tons of CO2 will be prevented. The payback period of the entire project is estimated at 1.5 years.

• Analysis of composition and properties of anode spikes (M.Yu. Korobova, SFU)

The study subjects are anode spikes formed on anode bottoms. The results of investigation of their chemical composition, structure, conductivity, density, and porosity are presented in this work. The following complex of methods was used: scanning electron microscopy with electron probe microanalysis, optical microscopy, differential thermal analysis, X-ray phase analysis, inductively coupled plasma atomic emission spectroscopy, four-point probe technique for the determination of electrical conductance, and others. Some of the obtained data were given in comparison with the characteristics of butt material.

• Technology of two step cleaning of electrolysis gases with sodium sulfate production (Yu.V. Bogdanov, RUSAL ETC)

 

• Heat exchange model for optimizing the voltage reduction of startup pot (A.V. Makeev, SFU)

 

• Development of the technology of obtaining the binding pitch for the anode mass through thermal dissolution (V.K. Frizorger, RUSAL ETC)

 

• The effect of sectioning the self-baking anode on the performance of an aluminum reduction cell (S.G.Shahrai, SFU)

Self-baking anode with the help of cells, enclosed in a common anode casing, is formed as separate blocks, the dimensions of which are much smaller than the monoblock anode. Preliminary results of mathematical simulation of the distribution of the gas phase in the electrolyte show that the thickness of the gas layer under the sole of the monoblock anode is 1.5 times greater than in the version with a sectioned anode, 7.5 and 5 mm, respectively.

SYMPOSIUM “Evolution of Russian aluminium reduction technology”

• Evolution of Russian aluminium reduction technology (V.A. Kryukovskiy, UC RUSAL)

 

• Future technology of aluminium electrolysis (G.A. Sirazutdinov, UC RUSAL)

 

• Inert anodes in aluminium reduction cell: overview (Sai Krishna Padamata, SFU)

 

• Low-temperature synthesis of titanium diboride (E. Gorlanov)

The technology of carbothermic reduction of titanium and boron oxides in the TiО2-B2О3-C reaction mixture at temperatures up to 1070°C is presented. In the Ti-B-O-C system, successive phase formation of TiО2→TinO2n-1→TiBО3→TiCxO1-x→TiB2 at 1030 ÷ 1050°C was realized, which was recorded by X-ray phase analysis of the samples after synthesis. The conditions for the realization of low-temperature synthesis are established, which consist in observing the prescriptions and special regimes for preparing the reaction mixture, the conditions for heating and holding the samples in a controlled atmosphere.

Carbon Materials

Chairs: Yuriy Frantsev (UC RUSAL)
Markus Meier, dr. (R&D Carbon Ltd., Switzerland)

• Testing of Anodes, Cathodes and Ramming Paste: A Must for Smelters (Markus Meier, R&D Carbon)

 

• Prospects for the introduction of oil-containing material in the production of anode paste (B. Zelberg, “Spetsstroiinvest” LLC )

 

• Increasing of efficiency of the using carbon-graphite materials with lithium additives in electrolysis of aluminum (V. Bazhin, St. Petersburg Mining University)

 

• Physico-chemical modeling of the processes of obtaining petroleum coke from tar and heavy residues of oil refining (K. Matreninskiy, Irkutsk National Research Technical University)

Using bundled software “Селектор-С” (Selector-S), evolution of multicomponent heterogenic system “vacuum residue – pyrolysis heavy resin” was simulated, and composition of the formed gases, liquid hydrocarbons (kerosene, etc.) and coke in the temperature range of 450–550 °C was investigated. Average composition of oil processing liquid residue comprised of paraffines, naphthenes, aromatic hydrocarbons, asphaltenes, and resins with ash and carboid impurities was used as carbon rich component. Physicochemical model comprised solid organic phases, liquid hydrocarbons and gas phase. A total of 250 organic and inorganic compounds. Simulation of coke generation processes was carried out in the temperature range of 350–400 °C.

• Innovation of prebaked anode design to enhance productivity (I.V. Cherskikh, RUSAL ETC)

 

• A method of evaluating anode paste impregnation degree (S. Khramenko, RUSAL ETC)

 

• Modernization of calcining complex on RUSAL Bratsk branch in Shelekhov city and "SUAL" "Volgograd anode plant-SUAL" branch for petroleum coke production (I. Lapaev, RUSAL ETC)

 

• Treatment of gas emissions in potroom. Anode inert tray, a new way for anode butts emissions reduction (Pascal Mausset, Fives Solios)

Today, in standard aluminium smelter, Fluoride emitted by pots represent about 30 kg for each ton of alumina produced. After Fluoride recovery by the Gas Treatment Center, more than 0.5 kg of Fluoride for each ton of alumina produced continue to pollute the atmosphere.
This value can be optimized to 0.37 by the last generation of Fives Solios Gas Treatment Centers.
About 90% of these remaining emissions are directly emitted in the potroom.
This presentation explains how Anode Inert Tray technology developed by Fives can eliminate up-to 40% of these remaining Fluoride emissions in potrooms, even in existing smelter.
This innovative and patented solution was developed with ALRO company in its Slatina smelter, Romania

• Rhodax Green Anode Plants – A Long Lasting Success Story (Christophe Bouché, Fives Solios)

For almost 15 years, Fives’ Green Anode Plant technology has been based on the Rhodax® process. The Rhodax® Crusher key characteristics are linked to in-bed compressive grinding which allows a selective crushing for higher green and baked anode density. The Rhodax® process delivers a dry mix recipe with a high grain/sand (G/S) ratio to minimize thermal shocks of anodes. The simplification of the process is significant with respect to conventional processes and makes it a cost effective solution in terms of CAPEX and OPEX. With today 10 plants under operation or construction serving the production of more than 4.1 Mtpy of primary aluminum, this process has demonstrated its ability to produce high quality baked anodes with strong benefits on the energy consumption, thermal shocks and carbon consumption in pots. This pioneering and cost effective process solution is proposed as a global package technology on a turnkey basis all over the world: Gulf, India, China, Russia, etc.

•  Parameter optimization and efficiency improvement of slot cutting in baked anodes (A. Savina, RUSAL ETC)

 

• Optimized rodding cast iron produced without addition of phosphorous (A. Savina, RUSAL ETC)

 

• Andalusite refractory products for anode furnaces (V.V. Skurikhin, JSC «Borovichi refractories plant»)

JSC "BKO" has developed a line of refractory products based on andalusite for lining anode furnaces, taking into account the peculiarities of the service conditions of each of the elements of the furnace design. Properties of products meet the requirements of leading European engineering companies. Certification tests were conducted in independent testing laboratories ICAR (France) and DIFK (Germany). RIEDHAMMER audited refractory production and design (development) of products and issued a certificate of an authorized supplier with the category.

• Anode quality improvement methods due to efficient screening of slag during preparation of anode paste (A. E. Nikulkin, ROTEX)

 

• Storvik HAL Compactor (G. T. Gravem, Storvik Holding AS)

The vibrocompactor is the main component in the forming stage of the green anode in the paste plant. The paste for an anode is densified in the vibrocompactor by dynamic and static mechanical forces during a time period less than a minute. The paper describes the different functionalities of the compactor and also different potentials it has for anode production capacity and quality in the future. The HAL vibrocompactor has been developed since 1959 and today the input of dynamic force is integrated to the cover weight (the vibrating mass on top of the anode paste). This results in more effective vibration and short vibration time. The feeding of paste is done from 2 hoppers in stationary position with minimal filling time of the mould. Production capacity is 36 anodes/hour at 22 s vibration time. The compactor has few movable parts and the maintenance and operation cost is very low. Availability factor is measured to 99,5% over 5 years.

• Production and Performance of Slotted Anodes (Giovanni Campice, Tomorrow Technology)

 

• Research of physical and chemical properties of mix of oil-containing material and coal-tar pitch (M.A. Glushkevich, JSC SIBVAMI)

 

• Full control of pitch burn during baking: it’s impact on anode quality, baking process, furnace maintenance and emissions (Detlef Maiwald, Innovatherm Prof. Dr. Leisenberg GmbH+Co. KG)

 

Technology of Non-Ferrous Metals and Alloys Treatment / “BIRONT’s Memory Readings”

Chairs: Vladimir Babkin, prof., dr. (Siberian federal university)
Sergey Belyaev, prof., dr. (Siberian federal university)
Vladimir Zhereb, prof., dr. (Siberian federal university)

• Structure and mechanical properties of the sintered composite (Al-12Si)-Sn after the hot densification (A. Skorentsev, Institute of Strength Physics and Materials Science SB RAS)

 

• SECO/WARWICK up-to-the-minute aluminum heat treatment solutions to meet 4.0 industry (Tomasz Kaczmarczyk, SECO/WARWICK)

 

• Obtaining and properties of copper based composite materials, reinforced by chromium borides particles (A. Trunova, SFU)

The possibility of purposeful synthesis of chromium boride in the technical copper melt to create a composite alloy has been proven in this work. The results of the study of the mechanical properties and macrostructure of cast composite material used as a billet for subsequent cold deformation in obtaining the finished product for electrical purposes were presented.

• A study of the influence of thermal processes during solidification on the structure and properties of die steels H13 (N.V. Larionova, SFU)

 

• Influence of hydrogenous inclusions on speed and nature of corrosion processes of aluminium and its alloys (E.G. Partyko, SFU)

The work investigated the influence of the shape and content of hydrogen-containing inclusions process intergranular corrosion of automotive aluminum wheels from aluminum alloy grade AK12. The sample size 20х10х5 mm was selected as a single disk without a protective coating, cut from the most typical areas of the casting (center, edge, thick and thin section) with other discs with different content of hydrogen.

• Study of preliminary mechanical activation as a way to regulate reactivity and structural transformations during self-propagating high-temperature synthesis for Ti-Ni and Nb-Si systems (O. Shkoda, Tomsk Scientific Centre, Department of structural macrokinetics)

 

• Innovative technologies for producing steel-composite materials for electrometallurgy (E.V. Feskov, SFU)

Bimetal copper-steel is an effective material that combines high electrical and thermal conductivity of copper, and the strength properties of steel. In the paper, simple and economical methods for obtaining a large-sized steel-copper rectangular billet, suitable for use as a cathode rod of an electrolyzer, are described. Three methods for obtaining bimetals on model samples have been described, which were then tested on large billets, with dimensions close to the dimensions of the cathode rods.

• Modern laboratory and industrial equipment for thermal treatment (F.Farakhutdinov, SocTrade)

SokTrade is the exclusive representative of a number of companies in various industries. One of the broad areas of work is furnace equipment of such companies as LAC (Czech Republic) and CM Furnaces (USA). The presentation will present new trends in the work and capabilities of modern thermal equipment for various areas of production and research.

• Technological and operational properties of automobile wheel disks from experimental alloys of the Al-Si-Mg system (P. Udod, SFU)

The influence of magnesium additives to the high-tech alloy AK12 on the foundry, mechanical and operational properties.
Disks of automobile wheels. The temperatures of the phase transformations of the experimental Al-12Si-(0,15-0,30) Mg alloys were determined by the method of differential scanning calorimetry. The plastic and strength characteristics of the prototypes in the cast and heat-strengthened states are calculated. Experimental wheels for long-term strength and impact resistance were tested.

• Effect of mechanical activation of the modifier from shavings after cutting A85 on the strength characteristics of aluminum alloys (A. Yushkova, SFU)

The main challenge for the materials scientists and technologists in the metallurgical, machine-building and other industries is the creation of new materials with specified level of properties. Important in this task is the technology of powder metallurgy. One of the trends in this industry should be the development of technologies for producing materials, semi-finished and finished products of the chips, which were, until recently, waste engineering and metallurgical production. As powder, struzhkova technology include the implementation of elements such as: analysis of the status of raw material, given its composition, structure and geometric characteristics and structural state of the particles (chips); the compaction of chips in the press billets of appropriate size and shape; transformation of press workpieces in a compact with adjustable porosity. In our work, we conducted mechanical activation (MA) chip A85 alloy, the activation time when the force of 50 g was 10 s, the influence of hot and cold briquetting on the properties and macrostructure of aluminium alloy modified strukovym modifier before and after MA. Presents the combined modification strukovym modifier before and after MA with the addition of magnesium. Increased strength properties of the alloy under satisfactory mechanical properties and hardness.

• Non-waste production of alloy wheels from aluminium alloys (V.R.Abalymov, SFU)

This study demonstrates optimization of scrap material involvement into eutectic silumin in order to provide customer required product characteristics. Optimization was performed based on research of relation of durability/hardness properties to chemical composition of batch.

• Effective modifiers based on nano-disperse powders of tungsten and titanium carbides for grey cast iron and steel (V.A. Poluboyarov, Institute of Solid State Chemistry and Mechanochemistry of the SB RAS)

The goal of the given work is the complex comparative analysis of certain modifiers based on refractory ceramic particles and metal-protectors for ladle treatment of cast iron and steel. In the process of intra-mold modification of grey cast iron and Hadfield steel, the compositions on the basis of nano-disperse tungsten and titanium carbides produced by the combined method (self-propagating high-temperature synthesis in combination with mechanochemical treatment) have revealed the highest efficiency in comparison with the other studied modifiers: in the limits of ceramic phase concentration 0,013-0,2%, as for grey cast iron, the increase of tensile strength has been up to 20%, of hardness – up to 13%, of wear resistance – up to 69%, of corrosion resistance – in 2,6 times; as for steel, the increase of rupture strength has been up to 18,0%, of relative elongation – up to 40%, the desrease of graon size – in 6,8 times. It has been shown that, when investigating the processes of grey cast iron modification with the help of modifiers containing nano-disperse ceramic phases, it is necessary to take into account not only the concentration and composition of modifiers, but different technological parameters (design and volume of mold, the method of modifiers introduction etc.) as well.

• Modernisation of CONFORM system (Yu.V. Gorokhov, SFU)

We consider the technical features of schemes of press products from non-ferrous metals continuous pressing Conform. Identified characteristic of many installations Conform disadvantage on the basis of the analysis of the structure of varieties of press equipment - lack of communication between the system of fixing the fixed part of the releasable container (shoe) to the shaft of the drive wheel. It is not possible to observe the process of installing a controlled clearance between the shoe and the bottom of the groove, which, in turn, gives stability to the bar stock feed matrix. The purpose of work - development of design documentation for the production of a pilot plant with a new system of fixing the shoe, providing a steady flow of continuous metal extrusion process.

• Micro heterogeneity and peculiarities of crystalization of automatic aluminum alloys (V. Babkin, SFU)

The microheterogeneity of the Al-Cu-Mg-Pb mono-tectonic system causes the coarsening of the particles of lead-containing phase during melting and casting and their uneven distribution over the cross-section and height of the ingot upon solidification. The effect of surfactants on the interfacial tension of the contacting phases and the conditions for a possible transition of the metastable structure of the melt to the structure of the true solution is studied. The effect of temperature and melt modulation of a monotectic system on the formation of the metal structure during the crystallization process is studied.

• Comparative value engineering of the use of various reducing agents in the pilot production of magnesium by OK Stroibis company (I.M.Komelin, STROIBIS OK LLC)

Requirements for dolomite and reducing agents for the production of magnesium by a thermal method have been formulated. The description of the experimental installation of vacuum-thermal reduction of magnesium from oxide raw materials is given. Based on the experimental data, the main technical and economic indexes of magnesium production from the Shchelkovsky deposit dolomite were obtained using ferrosilicon FS75, silicon Kr2 and filings of aluminum-silicon alloy (9% Si). Based on the data obtained, the cost magnesium production in modern Russian conditions is analyzed.

• Identification of phases in alloys of aluminum - magnesium - zinc system with amount magnesium + zinc = 8% (G.A. Merkulova, SFU)

 

• Research of the influence of geometric parameters of the induction system on the character of formation of the liquid phase of titanium blank (A.A. Maksimov, SFU)

 

Casting, Treatment and 3D of Aluminium and Alloys

Chairs: Aleksandr Krokhin (UC RUSAL)
Viktor Frolov (UC RUSAL)
Viktor Timofeev, prof., dr. (Siberian federal university)
Yuriy Gorbunov, prof., dr. (“SIAL Group”)

• Analysis of scientific and technical achievements in the casting of aluminium and alloys (TMS 2017 materials) (A.Yu. Krokhin, RUSAL Global Management B. V.)

 

• Quality control of Al-Si castings based on the structural heredity effect (K. Nikitin, Samara state technical university)

Theoretical views and practical approaches in the use of the phenomenon of structural heredity, which aimed to improve the efficiency of production of castings from alloys of the system Al-Si are contained. Researches of methodology of the phenomenon of structural heredity in alloys Al-Si are present. Mechanisms of long-term preservation of the inherited structural information in the liquid state depending on the charge structure of metals are justified. The results of the complex influence of physical effects on the alloys in solid, liquid and crystallizing conditions on the structure and properties of alloys of the system Al-Si are given. Resource-saving technology for obtaining microcrystalline alloys of ligatures and modifiers with maximum use recycle-able metal waste, which has had successful pilot testing at many Russian enterprises were developed.

• Recycling of 6XXX Series Aluminum Alloys-A Study on Mechanical Properties (Samuel Wagstaff, Novelis)

 

• Effect of cavitational processing on aluminum melt in direct chill casting of slabs (I.Kostin, RUSAL ETC)

 

• Production of aluminum wire rod for enameled wire (L.P. Trifonenkov, RUSAL ETC)

 

• Production of hard aluminum alloy wire rod by combined rolling and pressing (A. Salnikov, RUSAL ETC)

 

• Development of new high-strength aluminum alloys (A.V. Frolov, RUSAL ETC)

 

• Hot tearing mechanisms upon direct-chill casting of aluminium alloys (D.Eskin, Brunel University)

Hot tearing upon DC casting is a major defect frequently resulting in billet rejection and re-melting. The core reason for hot tearing is the inability of a semis-lid metal to withstand tensile stresses caused by inhomogeneous cooling and contraction of the billet. The presentation details the mechanisms of hot tearing, both from the viewpoint of macroscopic conditions of cracking and from the viewpoint of microscopic development and healing of cracks. Some technological means of reducing hot tearing are considered as well.

• Redesign of aluminum aircrafts structural parts for environmental friendly manufacturing processes selection (Claudia Hodonou, École Polytechnique de Montréal, Montréal)

 

• Practical methodology for the study of the contact interaction between a workpiece and a tool in cold deformation processes (A. Abramov, Ufa State Aviation Technical University)

A methodology is proposed for the evaluation of the contact interaction of a workpiece with a tool in cold deformation processes, which makes it possible to reduce the time and material costs for the industrial testing of lubricants, select a technology for the preparation of workpiece surface that meets the process requirements, increase the service life of the tool, reduce the costs and improve the quality of the products.

• Influence of cladding layer thickness on strain distribution over ingot cross-section (V. Yashin, Arconic SMZ)

One of the focuses of rolling process intensification is to increase ingot dimensions. Normally, ingot width is determined by ordered material width, ingot length is limited by the casthouse capabilities. Increase of the ingot thickness is of our main interest. Thicker ingots complicate the rolling process in the sense that rolling with high deformation zone has more inhomogeneous strain. When rolling clad material, the inhomogeneous strain affects the rolled product cladding layer thickness. In this article, DEFORM modeling is used for theoretical study of relationship between cladding thickness (of a softer alloy than the core), strain inhomogeneity and the depth of its penetration. Two critical cladding thicknesses are established, the first one is up to which the cladding presence increases compressive strain penetration along the ingot height, and the second one above which plastic strain does not penetrate the ingot. The study was carried out for conditions that are of practical importance in production of aluminum alloy sheet and plate for aerospace applications.

• Magnetohydrodynamic technologies for the foundry operation (Е.А. Pavlov, UniMet LLC)

 

• Aluminum-Calcium Alloys without Requirement for Quenching (N. Belov, National University of Science and Technology MISIS)

The phase composition, microstructure and properties of multicomponent aluminum alloys based on Ca-containing eutectics have been studied. It is found that the structure of Ca-containing eutectics is much finer than that of Al–Si alloys. Because of the high volume fraction of Ca-containing particles (up to 33 vol.%), these alloys may be considered as promising “natural composites.” The strength properties of alloys Al–Ca–Х may be significantly enhanced by adding Sc and Zr, forming L12 nanoparticles, without requirement for quenching.

• CUMITHERM – high quality products from reactive sintered Al2TiO5 for non-ferrous metallurgy (Santanu Mndal, Carborundum Universal Limited)

CUMITHERM®, a reaction-sintered Aluminium Titanate (Al2TiO5) products for Thermal applications. CUMITHERM is ideally suited for non-ferrous molten metal handling & primary processing Al-metals & secondary processing. The mechanical properties and hence CUMITHERM® performance improves with increase in temperature and gets doubled at around 9000C. Such key-properties like dimensional stability and increase in strength with temperature are very rare in the field of material science.

• Improvement of a technique and equipment for express-analysis of hydrogen content in aluminum melt (E.G. Partyko, SFU)

In the course of joint research conducted by SFU and UC RUSAL, the developed technical solutions aimed at improving technique and equipment for Express-analysis of hydrogen content in molten aluminum and which provides the necessary accuracy and efficiency for controlling hydrogen content in the melt directly in a production environment.

• Properzi Technology for the production of Aluminium Rod, Ingots and Extruded Profiles (Alberto Ghisett, CONTINUUS-PROPERZI S.p.A.)

In 1949 Properzi developed the continuous casting and rolling system for the production of aluminium rod to be used mainly for the production of conductors and cables. Over the years the consumption of electrical power has increased dramatically throughout the world and the cable industry has requested rod made from a wider and wider range of more sophisticated and complex alloys. The production rate, originally limited to 1t/h or less, has currently reached 15t/h.
Benefiting from the experience gathered with large sized rod production plants, Properzi extended the continuous casting method to the production of aluminium ingots, starting from primary and secondary aluminium for a very wide range of applications in particular in the automotive sector where the use of aluminium is growing quickly.
During the last years Properzi has also introduced in his range of products the Properzi Forming (Pro-Form) Machinery with the aim to propose an equipment suitable to produce a very wide range of extruded profiles (Al solidal conductors, Al tubes, Al multiport, Al alloy rod, Cu and Al profiles/bus bars and many others).
The author explores the current requirements, continuously wider and more stringent, of the industry for aluminium rod, ingots and extruded profiles for the existing and new application with a particular attention to the automotive and aerospace industry.

• Study of strength properties of semi-finished products from economically alloyed high-strength aluminium scandium alloys for applications in automobile transport and shipping (D. Voroshilov, SFU)

The results of experimental studies of the strength properties of aluminum alloys with different scandium contents with the aim of obtaining from them the deformed semi-finished products for industrial applications.

• Research of modes of deformation during hot forging aluminum alloys by computer modeling method for estimation of the stamp of the stamping tool (I. Astrashabov, SFU)

In the work were studied of the deformation modes on the example of the hot forging process was studied in order to predict the flow of the technological process and to identify the possible places of failure of the die tooling.

• Effect of initial grain structure in billets on the structure and properties of the deformed products of alloying (R. Syryamkin, SFU)

 

• Production of slabs from the АМ5Sс alloy (I. Bobkov, RUSAL Bratsk)

 

• Calculation of the main parameters of the continuous casting process - pressing of non-ferrous metals (A.G. Ivanov, SFU)

Investigations of the combined process of continuous casting - pressing Kasteks ferrous alloys, implemented on vertical installation Conform wheel rotation axis - of the mold. Objective studies - creating dependent structural elements for the design of hardware that implement stable continuous supply of molten metal in the groove of the mold process, solidification and extrusion into the matrix openings.

• Development of the electromagnetic stirrer for continuous casting of aluminium ingots (M.Y. Kuchinskii, SFU)

The present paper represents the mathematical model for the research of electromagnetic processes during MHD - stirring of aluminum ingots liquid heart. As a result we received a pattern of electromagnetic field distribution as well as the calculation electromechanical characteristics at different parameters supply circuit.

• Transverse edge effect in MHD stirrer of liquid metal (M.Yu.Khatsayuk, SFU)

This report presents the latest results in the field of mathematical and physical modeling of physical processes in the MHD-systems of various types. Analytical and numerical models, laboratory physical models, methods and means of measuring electrophysical and hydrodynamic processes in MHD-devices developed by the authors are presented.

• Evolution of the AlSi10Mg alloy structure from UC RUSAL powder, sintered by the selective laser melting method (I.A. Redkin, RUSAL Global Management B.V.)

 

• Future developments of domestic aluminum alloy powders for additive technologies (I.Yu. Mikhailov, Light Materials and Technologies Institute)

 

• On the possibility of using the scrap of am-powders in the manufacturing of AAC foaming agents and metallic pigments (V.I. Putlayev, Lomonosov Moscow State University, Moscow)

 

• Light weight functional materials based on Aluminium alloys – nanoscale verification (Łukasz Kaczmarek, Lodz University of Technology)

 

• Precast Shapes for special applications in Holding and Melting furnace (Jon Begona, Insertec S.LU)

 

• Development of a Commercial Process for Ultrasonic Degassing of Aluminum (Reed von Gal, Southwire Company, LLC)

 

• Liquid Metal Processing of Aluminium: A Holistic approach in Casthouse Design (Pete Forakis, STAS Inc.)

 

Electrothermy of Silicon, Non-Ferrous and Ferrous Metals

Chair: Konstantin Elkin, dr. (UC RUSAL)

• Comparison of different electrode types for silicon production (A. Matveev, “ENERGOPROM Research and Development Center” LLC)

It is well known fact that several types of electrodes can be used for silicon production – CE, CGE, GE and composite type electrode. Comparison of all type of electrodes, features of materials and predicting of its behavior is very sensitive question for customer. Technology comparison based on production/customers data was done.

• Theoretical aspects and practice of guiding of recovery melting of silicon (K.S. Elkin, RUSAL ETC)

 

• Investigation of the of the brown char briquettes behavior in the reducing smelting of technical silicon (M. Timofeev, “Kremniy” JSC)

Silicon production of technical purity is carried out by method of karbotermichesky restoration of silicon from silicon dioxide. As a reducer use the carbon possessing big than silicon chemical affinity to oxygen at high temperatures.
In the conditions of real recovery melting silicon carbide – the first intermediate firm product of karbotermichesky restoration of silicon from silicon dioxide which in a high-temperature zone of a bathtub of the furnace is the only carrier of recovery potential.
The carried-out tests of briquettes from semi-coke of brown coal as a reducer aimed replacement of the enriched Colombian coal by briquettes from semi-coke of brown coals.

• Effect of thermal stability of quartz and granulometric composition of charge materials on the process of electrothermal smelting of metallurgical silicon (N.Zobnin, Auezov South Kazakhstan State University)

The article presents experimental data on the thermal stability of quartz from the Sarykolskoye deposit - the Quartz LLP (Almaty region) and the Aktasskoe deposit - Silicon Mining LLP, (Karaganda region). A comparative evaluation of these quartz data on their applicability for smelting of metallurgical silicon is carried out. It is established that these types of quartz are of little use for these purposes. Industrial optimization of the granulometric composition of charge materials was carried out using quartz of these deposits in conditions of the silicon plant of Tau-Ken-Temir LLP, Karaganda. Optimization was carried out on three-electrode ore-thermal furnaces with a capacity of 30 MVA with individual power supply of each electrode by an independent furnace transformer. As a result, an array of data was obtained reflecting the dependence of the specific consumption of electricity, the extraction of silicon into the metal, the yield of microsilica from the average diameter of the particles of charge materials. Conditions are found under which the above-mentioned technical and economic indicators are substantially improved.

• On the technology of Al-Si alloys quality improvement (A.A. Molyavko, “Kremniy” JSC)

The requirements to aluminum alloys which have increased, in recent years, limit the content in alloys of such elements as calcium, phosphorus which are brought by the alloying elements, such as silicon.
Improvement of quality of aluminum alloys can be reached by an aluminum fusion alloying silicon and refractory metals with hashing, at the same time the alloying is carried out a stream of the melted silicon, and refractory metals subject to additional hashing in a stream of the melted silicon.
All specified technologies of receiving alloys don't answer a question of improvement of quality of alloys due to reduction of content of undesirable impurity in alloy as purer are for this purpose necessary on impurity initial materials. And it, first of all, belongs to the technical silicon used as the basic alloying element.

• Tests of carbon electrodes prodeced from vitrinitic antracitic coal (D. Dresvyansky, “Kremniy” JSC)

All electrode and electrocoal materials at the heart of the contain carbon which properties allow to apply it to production of the wide range of products from which almost each look has specific properties. Good electrocontact and electrophysical characteristics; chemical inertness, big specific surface, small density; high durability and module of elasticity; a possibility of wide range of change of electric resistance – not the full list of unique properties which do carbon and graphite materials irreplaceable.
Electrodes for the rudnotermicheskikh of furnaces share on coal, carbon and graphite and graphitized.
Anthracites of the Donetsk basin have a wide variety of indicators and characteristics, but the general for all that, eventually, and defines their technological properties, the high content of a vitrinitovy petrographic component is. This fact causes a vspuchivayemost of anthracites at high-temperature processing therefore when heating them above 2500 °C vitrinizirovanny anthracites don't keep solidity of a piece. Therefore these anthracites are applied in technologies with the low level of calcination. The coal electrodes made with use with a diameter of 1205 mm of the "Obukhovsk" anthracite of production of CJSC EPM-NOVEZ have shown the increased expense in comparison with coal electrodes of the MUV-S brand of the same producer. It is necessary to carry out studying of the reasons of the raised expense of electrodes from anthracite of this field.

• Research of properties of the slags which are formed at refinement of technical silicon (A.E. Busko, Kremniy JSC)

 

• Analytical opportunities of the x-ray phase analysis for the quantitative definition of phases in the slag which is formed at refinement of technical silicon (T.T. Feferefrova, Kremniy JSC)

 

• Engineering solutions for fine grains reduction during silicon granulation process (V. Kovalev, «VSLKHZ» JSC)

The silicon which passed a refinement stage spreads in molds. In process of cooling ingots of silicon are laid down in a special tare, then transferred to a section of crushing and package of silicon for further processing.
The theory of grinding of materials says that the level of pressing of crushed material shall be minimum, the close to 1, in case of increase in this value leads to overgrinding of crushed material and the considerable output of small-sized classes. The minimum values of a level of pressing testify to an insignificant discrepancy of split up swore also the size of the received product, i.e. about need of phasic crushing.
More progressive are horizontal a roar, for example made by N.V. Heilig BV in which it is possible to change amplitude, the frequency and traverse speed of a cloth of a roar and material on it. Such construction of a roar completely excludes overgrinding of material in case of classification.

• Industrial silicon oxidizing refining using variable composition slags (A.A. Molyavko, Kremniy JSC)

 

• Research of technologies of cleaning of technical silicon from phosphorus (B.I. Zelberg, “Spetsstroiinvest” LLC)

 

• Increase of economic index of the first stages of solar electricity production technological chain (M. Kurbanov, Institute of ion-plasma and laser technologies. U.A. Arifov)

The need to master this technology is due to the fact that a large amount of waste is generated in the production of silicon and FS. This waste is both a silica-containing material - quartzite or quartz, and carbonaceous reductants - charcoal, coal, and various cokes used in production.
In addition, in the production of silicon and PS, a significant amount of silica-containing raw materials is lost along with the exhaust gases in the form of silicon dust or the so-called microsilica (MK). For example, when smelting 1 ton of a 75% PS, up to 500 kg of dust - MK is formed - and up to 1000 kg when silicon is produced.
The particle sizes of these wastes range from several micron to a few mm. Due to their small size, these wastes do not participate in the process, Either it is taken out of the furnace by a gas stream, or it evaporates at a high temperature of the furnace, without having had time to react, or with a large amount - worsens the gas permeability of the charge, which leads to its sintering.
Therefore, the above wastes are not used in the process. At the same time, good quality quartzite deficiency and expensive raw materials, reserves of quality quartzite are very limited.

• Silicon Photovoltaics - Development trends (S.Yakovlev, Terwingo LLC. )

 

• On the ways of industrial silicon smelting process control efficiency improvement (K.S. Elkin, RUSAL ETC)

 

• Possibilities of using dry separation of the microsilica for obtaining targeted products (V.V. Kondratiev, Irkutsk National Research Technical University)

 

• Improvement of operating properties of rails by reducing the collision of non-metallic inclusions in rail steel arising out of impurities in alloying ferrosilicon (V.V. Kondratiev, Irkutsk National Research Technical University)

 

• The use of steam coals in recovery processes (I.E. Khodosov, Siberian state industrial university)

Results of probes of processes of restoration of iron, manganese, silicon of oxides when using as reducers of coals of different technological brands are presented. Participation of a gas phase of coals in processes of solid-phase restoration of iron, and also restoration of manganese from oxides of manganese ore is established. It is revealed that products of thermal decomposition of coals and the formed carbonaceous rest lead to increase in extraction of silicon from dioxide of the silicon which is a part of quartzite.

XI CONFERENCE «METALLURGY OF NON-FERROUS RARE EARTH AND PRECIOUS METALS»

Metallurgy of non-ferrous and rare metals

• Synthesis and study of copper dibutyl dithiophosphate nanoparticles (D.I. Saikova, Siberian federal university)

 

• A new approach to the synthesis of rare-earth ferrites: the obtaining of garnet powders (N. P. Evsevskaya, Institute of chemistry and chemical technology SB RAS)

Dysprosium-iron garnet (DyIG) nanoparticles were synthesized with the new modification of the anion resin exchange precipitation method. Nanoparticles structure and morphology were characterized by the Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and transmission electron microscopy (TEM). The magnetic properties were studied by using a QUANTUM Design MPMS-XL system and the visible magnetic circular dichroism (MCD). The nanoparticles synthesized were of the garnet structure with an excellent crystallinity.
Nanoparticles magnetic properties were close to that of the bulk DyIG crystals. Nanoparticles magnetization dependence on an external magnetic field demonstrates narrow hysteresis loop and the strong magnetization increase in high fields. Visible MCD of DyIG was studded here for the first time. The MCD spectral and temperature dependences allowed to separate contributions of the Fe and Dy sub-lattices to this effect and to analyze each sub-lattice temperature behavior.

• Obtaining and description of lead dibutyl dithiophosphate nanoparticles (D. I.Chistyakov, Siberian federal university)

 

• The method of thermochemical decomposition of molybdenite concentrates (D.P. Homoksonova, Baikal Institute of Nature Management SB RAS)

A method based on the thermochemical decomposition of a molybdenum concentrate with a melting point for the complete conversion of MoS2 followed by hydrometallurgical treatment of cinder. One of the main advantages of this process is the binding of sulfurous anhydride to the soluble salt during the firing process, which allows eliminating or significantly reducing SO2 emissions.

• Precipitation of phosphate ions in hydothermal decomposition of iron nitrate in acid solutions (D.V. Kuzmin, Institute of chemistry and chemical technology SB RAS)

 

• Study of the features of extraction of scandium chloride with a mixture of tributyl phosphate and molecular iodine (A.A. Kuzmina, Institute of chemistry and chemical technology SB RAS)

 

• Low-temperature reduction of nickel from sulphide compounds (A.V. Dontsov, Siberian federal university)

The possibility of reducing the chemical losses of alkali during the reduction of nickel directly from the sulfide compounds that form part of the nickel concentrate of converter matte separation is considered. It has been proved that, at temperatures of 350-650 ° C, the disproportionation of elemental sulfur in an alkaline medium is accompanied by the polymerization of sulfide and elemental sulfur to give the compound Na2Sn, (where n = 1 ÷ 3). This phenomenon helps to reduce the consumption of alkali by about 2.2-2.6 times.

• High-temperature sulfuric acid chalcopyrite concentrate pressure leaching (A.V. Kritskii, Ural Federal University)

Hydrometallurgical method of chalcopyrite concentrate processing are presented. The experiments were carried out using the concentrate of the following composition, %: 21,5 Cu, 0,1 Zn, 0,05 Pb, 0,04 Ni, 26,59 S, 24,52 Fe, 16,28 SiO2. "Statgraphics" program were used to plan and analyze the results of the experiments.
The process of high-temperature leaching allows to achieve a high level of target components extraction. The influence of temperature, oxygen pressure and the initial concentration of sulfuric acid on the leaching efficiency was studied.
The optimal parameters of the process were the following: t = 190 oC, PO2 = 0.4 MPa, CH2SO4 = 15 g /L. Under this conditions it is possible to extract up to 98% Cu of concentrate into the leach liquor in 100 min. Compositions of the solid leaching residue and leach liquor are given, further ways of their processing are suggested.

• Nickel-copper converter matte pressure leaching technology (K.A. Karimov, Ural Federal University)

Hydrometallurgical method of copper-nickel converter matte processing in a sulfuric acid solution are discussed in this article. The behavior of metals under various conditions has been studied. The experiments were carried out using synthetic converter matte of the following composition, %: 62 Ni, 7.1 Cu, 3.7 Fe, 18 S. "Statgraphics" program were used to plan and analyze the results of the experiments. The two-stage pressure leaching proposed for converter matte treatment:
1. High-temperature pressure leaching.
2. Low-temperature pressure leaching.
The process of high-temperature pressure leaching allows to achieve a high level of extraction of value components. The effect of temperature and oxygen pressure on copper extraction was studied. It was found that at low oxygen pressures the extraction of nickel into solution did not exceed 70 %, in independence on temperature. At elevated pressure of oxygen (0.43-0.85 MPa) and temperature (100 - 125 ° C), nickel recovery reached 68-90 %. With an increase in the duration of the process up to 180 minutes at PO2 = 0.43-0.85 MPa and temperature of 120-140 ° C, nickel recovery reached 97-99% The behavior of iron was also studied. The minimum value is 30%, with the following parameters: t = 140 - 144 oC, PO2 = 0.42 - 0.73 MPa. Further decrease in the oxygen pressure led to an increase in the extraction of iron into solution.
Low-temperature pressure leaching allows to achieve selective leaching of nickel into solution. It was found that the initial concentration of acid has a significant effect on the result of selective leaching process. It was possible to achieve the recovery of nickel in the solution at a level of 50-55 %, while copper and iron remain at the leaching residue. The concentration of copper and iron in a leaching liquor was, mg / L: 0.06 Cu, 0.62 Fe. The results of the research are illustrated by graphs and diagrams. Further methods for solution purification and leaching residue treatment are proposed.

• Approbation of vacuum-distillation technology of refining crude selenium as applied for condition of LLP "KAZAKHMYS SMELTING" (N.M. Burabaeva, JSC “IMB”)

The proposed work is the logical conclusion of research in the field of obtaining pure metals, in particular branded selenium, vacuum distillation, performed in the laboratory of vacuum processes of the JSC “Institute of Metallurgy and Ore Beneficiation”. The implementation of the developed technology in the production areas of the precious smelting workshop of the Balkhash copper smelting plant, the LLP “Kazakhmys Smelting” will allow all technical selenium to process in order to obtain a branded metal and additionally to extract noble metals (Au and Ag).

• Integrated processing of zinc-iron containing dust (A.E. Patrushov, Irkutsk National Research Technical University)

The greatest value among metallurgical wastes for further processing are dusts and slurries of metallurgical production with a high content of zinc and iron, and the issues of processing them with the aim of curing iron and zinc and isolating them into independent commodity products are becoming topical.
The developed direct reduction technology based on the annular hearth furnace allows the processing of the waste of metallurgical production to produce two high-quality finished products.

• Modeling of streams of charged particles with reference to processes of electrolysis (K.V.Mitin, Siberian federal university)

In work the movement of charged particles in electric field and potentials of electrodes in relation to problems of electrolysis is modelled. The law of the movement and a trajectory are constructed by means of splines of the second order. Emulators have been developed for 3D modeling of a stream of ions of copper between the cathode and the anode in an electrolysis bathtub. Numerical experiments on computer modeling of migration flows of ions in processes of electrolytic refinement of copper are made.

• Processing of bismuth nitrate solutions with the production of bismuth citrates (E.S. Naidenko, Institute of Solid State Chemistry and Mechanochemistry SB RAS)

The precipitation of bismuth citrates from nitric acid solutions of bismuth compounds production. It was demonstrated that bismuth (III) citrate such as BiC6H5O7 used in medicine for the synthesis of pharmaceuticals and in microbiology the production of bacterial preparations are appropriate to obtain via the precipitation from nitric acid solutions from manufacturing bismuth compounds with adding citric acid; the molar ratio between citrate ions and bismuth ions in the solution should be equal to 1.1.1.2, the process temperature being of (60±5) ºС.

• New method of synthesis of magnetic materials using the strongly basic anionite AB 17-8 (A.Y.Pavlikov, Siberian federal university)

The new method of synthesis of cobalt ferrite powders has been considered and the conditions of the process were determined. In this process the strongly basic anion exchange resin AB-17-8 in hydroxide form was used and coprecipitation of cobalt and ferric ions in the insoluble compound was occurred. The obtained product was studied by transmission electron microscopy and X-ray phase analysis. It was found that the product is a pure phase of CoFe2O4and consists of octahedral particles with a size from 70 to 90 nm.

• The influence of moisture contained in the process gases of the Waelz kilns on the performance of bag filters (L.A.Filyanova, Affiliate of the NSE "NC KPMRM of the RK" Metallurgical Research Institute for non-Ferrous metals)

 

• The effect of temperature on the kinetics of precipitation of ferri-ions in form of complex basic compounds (V.M. Piskunov, Affiliate of the NSE "NC KPMRM of the RK" Metallurgical Research Institute for non-Ferrous metals)

There are given the results of research on the study of the effect of temperature in the range of 100-160OC on kinetics of ferri-ions precipitation from sulfate solutions in the form of complex basic compounds

• Conducting research on the study of the influence of rock-forming minerals on the main parameters of heap leaching of oxidized copper ores from Kazakhstan deposits with different height of dumped ore layer (N.V. Sizikova, Affiliate of RSE “National Enterprise of complex processing for mineral and raw materials of the Republic of Kazakhstan “VNIItsvetmet”)

The research, conducted in VNIItsvetmet, determined that the composition of ore-bearing rocks has a noticeable effect on the parameters of the process. Dissolution during the leaching process of rock-forming minerals of Aktogay deposit ore leads to the decrease in copper recovery, increase of acid consumption with ore layer increase from 5 to 9-13 m.

• Flash smelting furnace operation using low heat value feed in Polar Division of PJSC MMC Norilsk Nickel (R.A.Marchuk, Polar Division of PJSC MMC Norilsk Nickel)

 

• Advances in research and development works and their application in crude ore and technogenic materials concentration in Norilsk industrial region (L.S. Lesnikova, Polar Division of PJSC MMC Norilsk Nickel)

 

• Reconstruction of the area of elemental sulfur recovery from Vaniukov furnace gases to solve environmental problems at MMC Norilsk Nickel’s Polar Division (D.V. Rumyantsev, Gipronickel Institute LLC)

Based on the earlier studies carried out at Gipronickel Institute LLC and operating experience at the elemental sulfur production line, the reconstruction project for elemental sulfur recovery area (ESRA) was developed, comprising the construction of a new elemental sulfur production line and reconstruction of the existing line, aimed at the utilization of the entire volume of VF off-gases (up to 77,000 Nm3/hour) with a throughout sulfur recovery factor of no less than 90%.

• Study of vertical zonality of salts of non-ferrous metals in the evaporative barrier (I. I. Vashlaev, Institute of chemistry and chemical technology SB RAS)

A series of experiments was carried out to study the kinetics of the process of deposition of non-ferrous metal salts and zonality on an evaporation barrier. The regularities of selective precipitation of non-ferrous metal sulfates are established. The main parameters of deposition processes influence were revealed and their quantitative estimation was given.

• Monitoring of natural technological structural and texture features of copper-nickel ores of Pechenga in the process of enrichment at the Enrichment Plant of the Joint-stock company "Kola Mining and Metallurgical Campaign" (S.V. Likhacheva, JSC "Kola MMC")

 

• Energy saving and electrochrome glass and solar batteries on the glass (T.N. Patrusheva, Siberian federal university)

 

• Extraction-pyrolitic method for nanostructural functional coatings on glasses obtaining (T.N. Patrusheva, Siberian federal university)

 

• Utilization of gases to produce liquid and solid carbon dioxide in the operation of slag melt furnaces (O.A. Vlasov, Siberian federal university)

 

• Hydrometallurgical technology of processing of products of gravitational enrichment of a screw lock of tails of sorption (S.E. Levkovets, OOO “KVADRAT PLUS”)

 

Metallurgy of precious metals

• Dissolution characteristics fine powder iridium (0) in acidic medium (R.V. Borisov, Institute of chemistry and chemical technology SB RAS)

The nanosized iridium powders (0) with surface areas from 1 to 46 m2/g were synthesized by reduction of iridium (III) chlorocomplexes in closed systems. The processes of iridium blacks dissolution in aqueous solutions of hydrochloric acid with additives of oxidants at temperatures over 170°C were investigated. Data on the degree of dissolution of iridium (0) powders depending on the surface area, time, temperature, oxidant were obtained.

• Innovative Biotechnological Processes in a Modern Gold Mining (A.V. Beliy, JSC Polyus Krasnoyarsk)

Are considered, on an example of Olimpiadinsky GOK, the innovative biotechnological processes used in a modern gold mining. Use of the given innovations has allowed to increase productivity of shops BIO on processing флотоконцентратов about 870 t/days to 1200-1300 t/days. The tests conducted in industrial scale have shown decrease in expenses on cyanides in 2 times. As a result of the spent researches on biodegradation thiocyanates and cyanides, concentration thiocyanates have lowered about 1800 mg/l to 0,02 mg/l, and concentration cyanides about 20 mg/l to 0,01 mg/l.

• Diversity of microorganisms involved in biohydrometallurgical processes (A.G. Bylaev, «Federal Research Centre «Fundamentals of Biotechnology» of RAS»)

Modern data on the diversity of microorganisms used in biohydrometallurgy are presented. Properties of acidophilic microorganisms important for biotechnology are considered.

• Determination of gold and silver grade in ion exchange resins by assay-gravimetric method (M.S.Zharlikov, Affiliate of the NSE "NC KPMRM of the RK" "The Eastern mining and metallurgical research institute for non-ferrous metals")

The work was carried out to develop a universal technology for performing measurements of the mass fraction of gold and silver in ion-exchange resins by the fire assay-gravimetric method, in which the optimal parameters are proposed: the composition of charge and the temperature conditions. This technology was recorded in the register SSEUM RK and recommended for using as control and arbitral.

• Silver extraction from hydrochloric acid solutions with neutral phosphor-sulfur-containing organic compounds (N.A. Grigorieva, Institute of chemistry and chemical technology SB RAS)

The data on silver extraction from hydrochloric acid solutions with neutral sulfur-containing organic compounds are given in this work. Based on the analysis of the extraction data, it was concluded that silver extraction is due to the formation of the compound AgCl∙2L in the organic phase.
Solvent extraction efficiency decreases in the series octyl alcohol > decane > chloroform > toluene, which is due to the preferential solvation of the extracted complex by the solvent. The possibility of using the disulfide for silver extraction from hydrochloric acid solutions containing metal impurities (Ni, Cu, Co, Zn, Fe (III), Na) has been demonstrated.

• The investigation of the influence of dumped ore layer height on the main parameters of heap leaching of gold-bearing ore from Kazakhstan deposit (N.V. Sizikova, Affiliate of RSE “National Enterprise of complex processing for mineral and raw materials of the Republic of Kazakhstan “VNIItsvetmet”)

The research was carried out on the gold-bearing sample of ore with grade of gold 1.5-1.8 g/t. The research determined that with the increase of ore layer height from 1.67 to 5.01 m, gold recovery decreases by 2.5%, which can be explained by the decrease of average grade of sodium cyanide in solutions, with the increase of ore layer height.

• Perspectives of processing of carbonaceous-arsenic gold-containing sulphide ores (L.S. Bolotova, State scientific-industrial association of industrial ecology “Kazmekhanobr”)

 

• Advanced equipment of ITOMAK company in the technology of mining and noble metals geological exploration (S.I. Afanasenko, ITOMAK CJSC)

 

• POLYPAM and FLOTFLOC flocculants produced by Flotent Chemicals, LLC for the Mining Industry (A.N. Zakirov, Trading House "Akvatep" LLC)

The process of condensation is one of the main processes in the production of gold. The drug is so large that it covers almost every process where it is necessary for the carrying out separation of liquid and solid phases after different technological processes of extraction of valuable components from ore. One of the reagents accelerating the data process phase separation of the pulp are chemical flocculants. Reagents the company Fluent Chemicals is represented by two lines of reagents flocculants Polypam and Flotfloc.

• Neat flotation reagents and new developments of the Flotent Chemicals (A.V. Martsifin, Flotent Chemicals Rus LLC)

Our company Flotent Chemicals is specialized in efficient selection, development and delivery to our customers of high-quality reagents for water conditioning and purification, sewage water treatment, metallurgy industry (reagents for mineral resource industry (rare earth and precious metals), coal dressing, etc.
Brief review of the delivered materials:
Xanthogenates, floatation chemicals (collectors), flocculants, coagulants (nonorganic and organic PolyDADMAC), polyamines, desalinisation reagents (cyanides substitution), flotation collectors of minerals and frothers, organic binding agents for iron-ore pelletizing, foaming agents, dust suppressants, antifoaming agents, depressants and activators in flotation, ion exchange resins, activated carbons.

• Coal Sorbent Usage at Gold Mills (S.V. Drozdov, AR CHEMEX GLOBAL LTD)

 

• BASF solutions to improve beneficiation of gold bearing ores (R. Kamkin, BASF LLC)

BASF offers a wide range of chemical solutions for gold producing factories. Report will present grinding aids, rheology modifiers, clay dispersants, iron deactivator for flotation, binders and wetting aids for heap leaching of gold containing ores.

• Processing of sulfide copper concentrate by low-temperature roasting with sodium chloride and subsequent two-stage leaching of calcine (P.V.Аlexandrov, BASF LLC)

 

• Integrated Processing of gold antimoniouis flotation concentrate (R.E. Rusalev, Ural Federal University)

 

• Synthesis and study of concentrated and high stable hydrosols of silver nanoparticles (Institute of chemistry and chemical technology SB RAS)

 

• The use of humic sorbent from sapropel for extraction of ions of palladium from chloride solutions (D.S. Platonova, F.M. Dostoevsky Omsk State University)

 

• The influence of dissolved oxygen concentration on the processes of hydrometallurgical processing of gold-containing raw materials (for example, offices GMO ZIF "Verninsky") (K.K. Klyuchevskiy, Polyus Proekt)

 

• Hydrometallurgical technology of processing of products of gravitational enrichment of a screw lock of tails of sorption (A.A. Idatchikov, Polyus Proekt)

 

• The synthesis of magnetic nanoparticles based on iron compounds coated with a gold shell (T.V. Trofimova, Siberian federal university)

 

Symposium in honor of academician A.I. Kholkin “Chemistry and chemical technology"

• Analytical control of chemical – technological processes and quality of production (ac. Yu. A. Zolotov)

 

• Ecological problems of Norilsk Nickel and possible solutions (ac. L.I. Leontiev, A.V. Tarasov)

 

• Materials based on cerium dioxide: application in biology and medicine (member of RAS V.K. Ivanov)

 

• Binary extraction – process features and perspectives of application for extraction and separation of metals (Dr. of Chemistry V.I. Kuzmin)

 

• Extracts as precursors for production of metallic powders and coatings by extraction – pyrolytic method (prof. Yu.M. Yukhin, A.I. Titkov, O.A. Logutenko, ac. N.Z. Lyakhov)

 

• Presentation of ac. A.I. Kholkin

 

XIII CONFERENCE «GOLD OF SIBERIA»

Mineral and raw materials sources of non-ferrous and precious metals

• «Verninskoe» deposit ore recovery flowsheet optimization using flash-flotation (S.V. Bulgakov, Polyus)

 

• Composition, properties and behavior of fine particles derived from grinding of sulfide ores of non-ferrous metals (S.V. Karasev, Institute of chemistry and chemical technology SB RAS)

 

• The Siberian polymetallic ores reserve base (D.A. Korchagina, Central Research Exploration Institute for Non-Ferrous and Noble Metals)

 

• Main stages of formation of placer gold-content (east Siberian Platform) (Z.S. Nikiforova, Diamond and Precious Metal Geology Institute SB RAS)

According to study of mineralogic-geochemical features of placer gold and regularity of its distribution, it is identified that, formation of wide significant placer gold-content at the east of the Siberian platform took place due to repeated redeposition of gold from ancient sources to the younger ones and just locally from neighboring primary sources of the Mesozoic age.

• Hydrothermal mercury-silver mineralization in deposits of different formations (V.I. Lebedev, V.S. Sobolev Institute of Geology and Mineralogy SB RAS)

Hydrothermal mercury-silver mineralization in the deposits of various formational affiliations. Hg-silver and intermetallides of silver and mercury are known in primary and oxidized ores of various formational types of ore deposits: Ni-Co-arsenide and Ni-Co-Ag-Bi-U; mercury; pyrite-polymetallic; uranium; Ag-Sb and Ag-Hg; Cu-Mo-porphyry. However in significant quantities Hg-silver is present only in the ores of Ni-Co-arsenide and Ag-Hg deposits where it is the main silver mineral.
Noble metals in cobalt deposits.
The following are considered: the features of distribution and concentration of noble metals, the isotopic composition of lead, strontium, sulfur and carbon in ores from different types of hydrothermal cobalt deposits; specificity of relationships with magmatic manifestations of different composition and dating; probable sources of ore matter.
Feasibility of the revival of cobalt production in Tuva
During 1970-1991 the mining and processing enterprise "Tuvakobalt" carried out the exploration of silver-cobalt-arsenide-carbonate veins of the Khovu-Aksy deposit as well as hydrometallurgical process of ores obtaining a composite concentrate for ammonia-carbonate technology. Huge amounts of veined mass containing arsenides and sulphides have been accumulated on galleries and more than 2 million cubic meters of arsenic waste hydrometallurgical process have been stored on the industrial areas in disposal pits over 20 years of operation wich represents the environmental threat to the population and the natural environment of basin complexes of the Yenisei River and its tributary Elegest.

• Noble metals in cobalt deposits (V.I. Lebedev, V.S. Sobolev Institute of Geology and Mineralogy SB RAS)

 

• Expediency of regeneration of cobalt production in Tuva (V.I. Lebedev, V.S. Sobolev Institute of Geology and Mineralogy SB RAS)

 

• Some problems of choosing the optimum complex of geophysical methods in research on solid mineral resources (A.N.Orekhov, LLC "Geo Service")

The report examines the methodological issues of the application of geophysical methods and, mainly, the choice of the optimal complex and the selection of the optimal methods of work.

• Some regularities in the distribution of gold-bearing placers on the Western Slope of the Average Ural (V.A. Naumov, Perm State National Research University)

 

• Mechanisms of gold accumulation on coals (V.A. Naumov, Perm State National Research University)

 

• Influence of seasonal freezing and overheating sulfide on gold particles in technogenic mineral sediments (A.Sh. Khusainova, Perm State National Research University)

 

• Observed, Transformed and Interpolated Data for Geological Modeling of Ore Bodies of Non-Ferrous and Precious Metal Deposits (M.M. Labushev, Siberian federal university)

 

• Technology of predicting gold mining facility according to integrated airborne geophysics (F.D. Lazarev, All-Russian Geological Research Institute. A.P. Karpinski, Norilsk Branch

In the case of Yenisei Ridge the technology of predicting gold mining facility has been considered through an analysis airborne geophysical data.

• Prospects of detection of a new large-volume gold deposits in carbonaceous-carbonate-terrigenous complexes of Siberian platform edging (R.Kh. Mansurov, Central Research Institute of Geological Prospecting for non-ferrous and precious metals)

In recent years, in the global exploration process, large-volume gold ore and complex gold-bearing deposits with low (0.3-2.0 g/t) average gold content, lying at shallow depths and available for open pit mining, have been given a wide attention. The most prospective types for the detection of large-volume gold mineralization are gold-sulfide-quartz and gold-sulfide objects, localized in carbonaceous-carbonate-terrigenous complexes. On the territory of the Russian Federation, a prime examples of large-volume deposits are the Olimpiadninskoe, Blagodatnoe, Vedugainskoye (Yenisei gold province), Sukhoi Log, Verninskoe (Baikal-Patom province), Natalkinskoe, Degdekan (Verkhoyansk-Kolyma province). All of these objects are confined to orogenic myogeosynclinal fold structures in the frame of the Siberian platform.

• Advanced equipment of ITOMAK company in the technology of mining and noble metals geological exploration (S.I. Afanasenko, ITOMAK CJSC)

 

• Prediction of areas prospective for gold based on results of processing aerial and satellite hyper spectral data (A.A. Kirsanov, Karpinsky Russian Geological Research Institute (VSEGEI))

Use of materials of hyperspectral surveys in predictive prospecting consists in possibilities of diagnostics of individual indicator minerals or mineral associations from spectral characteristics to identify the majority of ore deposits. As a result of 30 works in the Siberian and Far East, indicators of gold mineralisation were revealed; this enables detect and localization of the prospecting areas. The experience of the studies demonstrates that the use of hyperspectral data allows identification of potentially promising areas for Gold at early exploration stages.

• The connection of the gold mineralization of the Yenisei Ridge with structures of left-handed compression and stretching (S.M. Makeev, SFU)

In the framework of the original deformation-shear model of the gravitational field, the left-shift structures of compression and extension of the Yenisei Ridge are distinguished, gravitating to gold ore objects of different productivity. A strong correlation was established between the azimuthal structures of the gravitational and electric fields, related with their sensitivity to the regional field of tectonic stresses. This allows the use of methods of electrical prospecting for mapping the compression and stretching zones for the purposes of local forecasting of ore deposits.

• Evaluation of prospects of placer gold content in the Northwestern part of the Anabar shield (A. I. Kubyshev, «Polyarnaya Exploration Expedition» PJSC)

The results of exploration performed mainly by the Polyarnaya Exploration Expedition PJSC in the recent decades in the northwestern part of the Anabar Shield allows us to consider this region as highly potential for the identification of placer gold deposits.

• Gold and metals of platinum group in Anabar shield placers (A. M. Sazonov, Siberian federal university)

The results of the study of native gold and platinoids from the placers of the Anabar Shield are presented. The assumptions about the source of mineralization are given.

• Medium-scale regional geological surveys as a basis for predicting mineral resource exploration. Main results and prospects for its development in East Siberia (E.I. Berzon, FGUP VSEGEI)

 

• Complex multi-step mineralogical assessment of Pb-Zn-ores using Secondary Ion Mass-Spectrometry (G. Belokonov, SFU)

A coherent and consistent assessment method of Pb-Zn ores as a potential source of strategic metals as well as of the economically and ecologically sustainable technological opportunities for extraction is described. We present first results of our approach to overcome obstruction to a wide use of Secondary ion mass-spectrometry in economic geology.

• The role of biogenic factors in origin of gold from the crust of weathering and placers of the Salair (Yu.A. Kalinin, V.S. Sobolev Institute of Geology and Mineralogy SB RAS)

 

• Permian-Triassic metallogeny of gold in Central Asia (E.A. Naumov, V.S. Sobolev Institute of Geology and Mineralogy SB RAS)

 

• Mineralogical-geochemical features and recycling assessment of gold ore processing tailings at Olimpiadinkii mining and processing plant (V.A. Makarov, SFU)

 

• An experience of the downhole underground gold leaching at the Severo-Dolgomysovskoye auriferous weathering crust deposit (N.P. Sedov, LLC «Geoprid»)

 

end faq

 
 
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