Ural Mining and Metallurgical Company

Moscow, Russia

Ural Mining and Metallurgical Company

Moscow, Russia
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Sabanova M.N.,Sibay Branch of Uchalinsky Ore Dressing and Processing Enterprise | Savin A.G.,Ural Mining and Metallurgical Company | Shadrunova I.V.,Russian Academy of Sciences | Orekhova N.N.,Magnitogorsk State Technical University
Tsvetnye Metally | Year: 2013

To date, more than 110 mln. t of copper slags have been cumulated in the Urals. In recent yeras, the complex approach to the raw materials processing has been widely spread in the world. During the usage of this approach, the copper slags are considered as an additional source of copper. The copper slags processing technology is developed and implemented in Russia at the range of Ural concentration plants, included into the metallurgical complexes. One of directions of solving of old copper slags' filling problems is the processing of these slags on the nearest ore-dressing and processing enterprises, which have formed their own technology, equipment and water circulation for years. Detail research of copper slags of various metallurgical enterprises of Ural region made it possible to systematize and classify these slags. This research had its main tasks: - definition of peculiarities of copper slags for the purpose of forecasting of possibility and grade of copper reextraction from these slags; - definition of influence of pH and Eh parameters of the enterprise's water phase (where the slag flotation is planned) on its flotability. Research of influence of conditioning of circulating water on the slag flotation made it possible to define the direction of development of copper reextraction technology from copper slags at the concentration plants, which process the copper and copper-zinc ores.


Loginov Yu.N.,Ural Federal University | Demakov S.L.,Ural Federal University | Illarionov A.G.,Ural Federal University | Ivanova M.A.,Ural Federal University | Shalaeva M.S.,Ural Mining and Metallurgical Company
Tsvetnye Metally | Year: 2013

The object of research is clarification of sufficiency of industrial method parameters of pipes annealing from the heat engineering copper of M1r (M1p) grade. At the same time, there were solved the tasks of determination of physical and mechanical properties of copper in the following conditions: . during the intensive plastic deformation; . after vacuum recrystallization annealing. Methods of textural analysis are applied, along with metallographic methods of research, including optical microscopy and electronic microscopy with usage of diffraction of back scattered electrons. The deformed condition was reached by hot oxide free extrusion and subsequent multipass dragging with accumulation of cold deformation at total percent reduction of 99,4%. Carrying out of industrial annealing in vacuum at the temperature of 500 °R during 5,5 leads to the recrystallized condition of heat engineering copper at achievement of average size of grain of 9,9 μm. There was carried out the analysis of condition of special borders. Match of lattices' borders at various levels was reached for the deformed condition. At the same time, the share of special borders of the Σ3 type (which are characteristic for annealing doubles) is the highest for annealed condition and is close to 100%. There is defined that the Schmid frequency diagram in the deformed condition has two maximums: the first is in the field of 0.33 value; the second is near 0.45 value, which is explained by the textural components 〈111〉 and 〈100〉. After the process of annealing, the peak of frequency distribution of a Schmid factor moves towards great values, which corresponds about reduction of a share of grains in structure with the primary direction of 〈111〉 type along the pipe axis. Manufacturing of products from the heat engineering appointment copper is the results application area. There is made a conclusion about an acceptability of industrial annealing conditions in relation to this material and its purity degree.


Neustroev V.I.,Ural Federal University | Karimov K.A.,Ural Federal University | Naboychenko S.S.,Ural Federal University | Matveev A.V.,Ural Mining and Metallurgical Company | Skopov G.V.,Ural Federal University
Tsvetnye Metally | Year: 2013

This article shows the urgency of improvement of processing technology of complex polymetallic raw materials containing significant amount of toxic impurities (arsenic and lead). Practice of Ural non-ferrous metallurgy enterprises has shown that behavior of almost whole amount of processed ores is complex. Many authors have carried out the researches, which testify the fact that primary passing of the biggest part of arsenic (along with zinc, lead and other metals with high steam tension (metals and their compounds)) to gaseous phase (dusts and sublimates) happens during the smelting in various aggregates. Various technologies are used for processing of these dusts and sublimates. At the same time, once again, these technologies lead to formation of intermediate products, concentrated with arsenic. Thereby, harmful and toxic impurities circulate between operations and enterprises. That's why, it is necessary to decrease the number of operations to withdrawing of arsenic, zinc and lead from technological cycle in the preferable form of the products, suitable for following processing. There are given the results of thermodynamic analysis of main reactions of autoclave leaching of matte, obtained from the joint reduction smelting of Vanukov furnace dusts and circulating zinc intermediate products. Assessment of probability of process behavior and obtaining of leaching products is given according to these results. Methods of autoclave leaching of matte are described. There are given the results of experiments in the temperature range of 140-180 °C, acidity range of 10-80 g/dm3, and pressure of 0.4 MPa. Chemism of the reactions is discussed. There are identified the process parameters, which make it possible to carry out the process of selective extraction of copper into solution. At the same time, lead, arsenic and iron stay in the cake. According to this, there can be solved the problem of noble metals, which quantitatively stay in the lead cake. It was found that lead has the sulfate form. Copper is included in the sediment, formed as a result of leaching as Cu3(AsO4)2, and anhydrous and hydrated sulphates. Value of copper extraction reached over 94%. There is proposed the scheme of processing of these materials (mattes), including autoclave leaching as one of the basic operations.


Panshin A.M.,Ural Mining and Metallurgical Company | Anisimova O.S.,Ural Federal University | Mamyachenkov S.V.,Ural Federal University | Karelov S.V.,Ural Federal University
Tsvetnye Metally | Year: 2013

There are shown the prospects for expanding of raw materials base of zinc production due to the usage of oxidized anthropogenic wastes in the Waelz process charge. Oxidized anthropogenic wastes are the dusts of electric arc fusion of secondary steel, which distinctive feature is the high content of halogens (chlorine and fluorine) and iron compounds in it. Water-soda washing of Waelz oxides is connected with the following factors: - high consumption of industrial water (up to 10 m3/t); - difficulties in utilization of zinc production of obtained zinccadmium carbonate residue in the basic scheme; - considerable cost of purification of obtained hazardous flows. Single-stage distillation of up to 90% of chlorine and fluorine into the concentrated lead product with rather low temperature (up to 700 îÑ) is possible due to the secondary oxidation roasting of Waelz oxides with high content of halogenides. The roasting also makes it possible to oxidize the sulphide sulphur, iron and arsenic to the highest oxidation degree compounds. The obtained calcined product with a rich content of zinc has bigger bulk weight, than original Waelz oxide, which facilitates the subsequent leaching and reduces the consumption of reagents and water. Elemental and, especially, phase composition of oxidizing calcination sublimates is very important for optimization of subsequent operations of leaching of calcined Waelz oxide and processing of these oxidizing calcination sublimates. On the basis of phase composition of oxidizing calcination sublimates, it is possible to forecast the indices of hydrometallurgical operations, following after the calcination, and their effective and efficient management. There are given the results of elemental energy dispersion and phase analysis of middlings of prospective technology of two-stage Waelz process of zinc-containing dusts of electric arc steel making. There are defined the main phases, included into the Waelz process clinker of electric arc furnace dusts, calcinated Waelz oxide and secondary sublimates of its oxidation calcination.


Loginov Yu.N.,Ural Federal University | Demakov S.L.,Ural Federal University | Illarionov A.G.,Ural Federal University | Ivanova M.A.,Ural Federal University | Romanov V.A.,Ural Mining and Metallurgical Company
Tsvetnye Metally | Year: 2013

The object of research is definition of the homogeneity degree of structure and properties of copper wire rod, which was manufactured by the continuous casting and rolling method during the CONTIROD process. At the same time, there were solved the tasks of structure description and determination of physical and mechanical properties of electrotechnical copper. Durometer researches were carried out along with application of metallographic research methods, including optical microscopy and electronic microscopy with usage of diffraction of back-scattered electrons. Methods of textural analysis were also applied. Metallographic method confirmed the fact of existence of oxygen part in the form of particles of oxides, which can look like line allocations. There is defined that the size of grain increases from the center to the periphery. According to this, the radius averaged value is 17 ìm. There is established that the maximum of the frequency characteristic of the grain size is constantly falling at the range of 10-15 mkm. Increasing of average grain size to the periphery occurs not at the expense of volume coarsening of grains, but at the expense of appearance of groups of significantly larger grains (50 mkm and above) on the periphery. At the same time, the structure heterogeneity centers arise on the wire rod periphery. However, these centers are absent in the preparation center. The weak texture of metal is defined. Texture of the central zone of semi-finished product is presented by lowdefined recrystallization texture, which repeats the rolling texture {110} 〈112〉. Average Vickers hardness is 71 HV, and elasticity module is 111.7 GPA. There is defined the increased dispersion of hardness, which is connected with a composite structure of material, according to the presence of copper oxide particles in it. There is also defined the statistically significant asymmetry of distribution of hardness, relatively to the vertical axis of wire rod. This phenomena is explained by irregular outflow of heat during the process of metal crystallization on the foundry installation, which leads to various rate of cooling and formation of various structure of metal. Manufacturing of products from electrotechnical appointment copper is the results application area. There is made a conclusion about the possibility of structure alignment due to the management of uniformity of thermal fields at continuous casting.


Skopov G.V.,Ural Federal University | Belyaev V.V.,Ural Mining and Metallurgical Company | Matveev A.V.,Ural Mining and Metallurgical Company
Tsvetnye Metally | Year: 2013

This paper describes the reasons of withdrawal of electrofilter dusts from Vanyukov furnace charge. There is proposed a flow-sheet of separate processing of this dust. There are given the qualitative and quantitative results and indices of pilot testings, concerning to the withdrawal of dusts from Vanyukov furnace charge. There are shown the results of investigations of separate processing of Vanyukov furnace dusts in ore-thermal furnace with extraction of cooper and precious metals to matte, and extraction of zinc, lead, arsenic and antimony to slag and secondary sublimates. There is carried out the analysis of impurities distribution among the dust processing products and their influence on the quality of blister and cathode copper.


Pevzner M.Z.,Ural Mining and Metallurgical Company
Metal Science and Heat Treatment | Year: 2010

Induction heating of a brass strip in a transverse magnetic field is considered, and in particular temperature distribution and the properties obtained in the rolling transverse direction. The effect of heat treatment technology in induction devices of various construction is studied. Recommendations are developed for optimizing this process. © 2010 Springer Science + Business Media, Inc.


Panshin A.M.,Ural Mining and Metallurgical Company | Kozlov P.A.,ZINC Inc | Ivakin D.A.,ZINC Inc | Vyatkin V.N.,ZINC Inc
Tsvetnye Metally | Year: 2013

Waelz oxides contain a large amount of halogenides during the primary Waelz process of metallurgical production wastes. It is necessary to remove these impurities before the extraction of zinc into the solution and its electric extraction. Calcination is an efficient method of chlorine and fluorine removement from Waelz oxides. This method makes it possible to concentrate the considered components in a relatively small volume of secondary distillation, for the purpose of which, there is offered the separate technology of metals recovery and recycling. There is researched the kinetics of distillation of chlorine and fluorine compounds during the oxidizing roasting (calcination) of Waelz oxides in pipe furnace. There is substantiated that the distillation of halogenides is carried out in kinetic and allied diffusive-kinetic area, in terms of the nature of Waelz oxide (type of wastes, recycled by Waelz process) and original content of halogenides in this oxide. Activation energy of chlorine distillation varies from 1 to 60 kJ/mole. At the same time, activation energy of fluorine distillation varies from 3-110 kJ/mole. Increasing of calcination temperature and containing time of Waelz oxide in pipe furnace makes it possible to increase the chlorine distillation ratio and fluorine distillation ratio to 92-99% and 91-98% respectively. At the same time, the residual content of chlorine in calcined material is not more than 0.05%, and the residual content of fluorine is not more than 0.01%. This makes it possible to use the hydrometallurgical extraction of zinc into the sulphate solution for calcined Waelz oxides of the products, obtained from wastes.


Panshin A.M.,Ural Mining and Metallurgical Company | Kozlov P.A.,ZINC Inc | Ivakin D.A.,ZINC Inc | Vyatkin V.N.,ZINC Inc
Tsvetnye Metally | Year: 2013

Processing of difficult chemical products (dusts) of copper industry is very actual for the purpose of extraction of copper, precious metals, zinc, lead and iron. The usage of Waelz process makes it possible to transform zinc, lead and tin from the foregoing raw materials into Waelz oxide. Taking into account the chemical and mineralogical content of raw materials, it is necessary to develop the conditions for efficient extraction of the considered metals. There are considered the thermodynamic characteristics of the processes, taking place with zinc, lead and tin compounds in the conditions of Waelz kiln during the processing of charge on the basis of copper industry middlings. According to the phase analysis, the basic amount of zinc in raw materials has the oxide and sulphide form; the amount of lead has the sulfate form; and the amount of tin has the oxide form. There is shown the possibility of interaction of calcium oxide, zinc and iron sulphides and hydrogen (which is formed during the feeding of water vapour into the furnace) with zinc, lead and tin compounds with following distillation of metals (at the process temperature of 1500-1573 K). The most important factor for the technology development is distillation of lead without its recovery up to the metallic state, because metals accumulation in the rotary furnace leads to the failure of Waelz process. On the basis of experimental data, there are considered the mechanisms of the processes kinetics. According to the data processing, on the basis of the generalized level of heterogeneous reactions, there are defined the activation energies of lead and tin sublimation processes, which contain 63-77 kJ/mole and 66-100 kJ/mole, which corresponds to kinetic and combined area of reactions. The practical application of the considered reactions in Waelz-kiln makes it possible to do the following operations: - selection of optimal content of charge; - intensification of the process of non-ferrous metals distillation; - decreasing of the consumption of reducer (coke fines), which is supplied with raw materials.


Panshin A.M.,Ural Mining and Metallurgical Company | Kozlov P.A.,ZINC Inc | Ivakin D.A.,ZINC Inc
Tsvetnye Metally | Year: 2013

There are given the results of investigation of thermal conditions of rotating furnace (60,0×4,0 m) during the processing of charge, which contains zinc cake and oxidized zinc-containing raw materials (middlings of non-ferrous and ferrous metallurgy). The calculation of heat balance shows that usage of coke fines, supplied into the Waelz kiln as fuel and reducer, occurs at ~57%. Not burned out coke fines are discharged with the clinker, which requires its additional processing for the carbon recycling. For about 21% of carbon is consumed for extraction of zinc, lead and iron from oxides. The rest amount of carbon (36%) is oxidized directly in the process of interaction with oxygen, which is supplied to the furnace as the part of air blowing. The excess amount of the coke fines is defined practically and can have significant differences during the charges of different content processing and different furnaces usage. The ways of decreasing of the coke fines consumption are based on the selection of charge composition and temperature condition, guaranteeing the material passing through the furnace in the strewing regime, which ensures the efficiency of reducing processes and heat recycling in the furnace. The largest amount of the furnace heat (43.8%) leaves the furnace with gases. The mounting of the waste-heat boiler behind the furnace makes it possible to save the costs for 20% of the charged fuel by means of steam generation. It is also prospective to heat the air, which comes into the furnace during the "dry" cooling of clinker. There is investigated the possibility of decreasing of the fuel consumption, which provides the internal recycling of heat in the furnace. It is possible to use the reaction heat for the heating of air, coming into the furnace by iron oxidizing. Iron is recovered in the furnace by fine cokes carbon in the content of reaction material. Feeding of steam into the furnace makes it possible to do the following operations: - intensification of iron oxidizing process; - encouraging of absorption and transportation of the heat, radiated by the heat material into the furnace depth; - gasification of not burned carbon-containing fuel. Usage of the high pressure air blowing makes it possible to intensify the oxidizing reactions of distilled metals in the furnace depth. These reactions are the internal source of heat.

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