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Saint Petersburg, Russia

Volkov L.V.,Saint Petersburg State University | Kalashnikova M.I.,Gipronikel Institute LLC | Solovev E.M.,Gipronikel Institute LLC
Tsvetnye Metally | Year: 2014

For the purpose of identifi cation of cathode copper grade indices, which make an infl uence on spiral elongation number (SEN), there was made a comparison of actual grade of copper cathodes, manufactured by two groups of producers. The fi rst group of producers included the LBM-registered operations, which produce copper with 400 mm of SEN. The second group included highest grade copper producers (corresponding to ?00? State Standard 859-2001 (according to Russian standards), though not certifi ed at the LBM because of the lower SEN). The following grade indices were compared: presence of 9 elements-impurities; cathodes' thickness; presence or absence of trade mark. Actual grades of cathodes' and process parameters were taken from the Reports of the world major producers of copper cathodes, based on the primary feed, published in 2007. Eighteen plants (9 plants per each group, including all former USSR producers), which had not manufactured copper with required spiral elongation number, were selected out of 36 Electrolytic Copper Anode Refi neries. The grade comparison was performed using the Principal Components Analysis intended for the multivariate data analysis at the variables, set in the digital form. Negative correlation of SEN and content of Se, Te, Bi, S and Ni impurities in copper was revealed, while correlation of SEN and the cathodes' thickness was positive. Qualitative assessment was made according to the average impurities' content, which proved the fact that Se, Te and Bi content in the fi rst group copper is 3-4 times lower, in comparison with the second group copper. According to this, mass of each content of element, equal to 0.1-1.0 g/t, is below the State Standard requirement value, equal to 2 g/t. In the first group of producers, average thickness of cathodes is 1.5 times higher than in the second group. There was defi ned the fact about indirect support, reasoning the diff erence in the cathodes' grade: the second group producers' copper is characterised by higher content of anode slime microparticulate inclusions. Source


Talalov V.A.,Polytechnic University of Mozambique | Rumyantsev D.V.,Gipronikel Institute LLC | Starykh R.V.,Polytechnic University of Mozambique
Tsvetnye Metally | Year: 2015

In the recent years, Polar Division of JSC "Norilsk Nikel" have defined the tendency to ore base impoverishment, which makes a significant influence on composition and volume of metal-bearing feed, treated in the flash smelting furnaces of Nadezhda Metallurgical Plant. The flash smelting furnaces' stable performance (or workability) depends on the feed composition and characteristics. In particular, changes in composition and characteristics of ore fed to the flash smelting furnaces led to serious build-up formation in uptakes and settlers of flash smelting furnace-1 and flash smelting furnace-2. The build-up became rather sizeable, blocking the uptake and settler joint cross-section, disrupting regular gas removal from the furnace. For the purpose of analysis of build-up formation causes (using mathematical simulation), the gas stream flow behaviour in the flash smelting furnaces' uptake and settler was investigated together with the factors, influencing the gas stream at various furnace operating conditions. The results of the studies of the gas phase flow in the flash smelting furnaces' uptake and settler obtained via mathematical simulation are presented. The mathematical model was developed on the basis of Navier-Stokes equations, using classic turbulence model. Gas composition changes within acceptable industrial limits did not exert any marked effect on the flash smelting furnace gases flow. The furnace design and off-gases volume are the principal factors influencing the gas phase flow. Source


Ozerov S.S.,Gipronikel Institute LLC | Portov A.B.,Gipronikel Institute LLC | Blekhshteyn B.L.,Gipronikel Institute LLC | Tsemekhman L.S.,Gipronikel Institute LLC | Fomichev V.B.,Norilsk Nickel
Tsvetnye Metally | Year: 2013

At the Arctic Division of M&MC Norilsk Nickel has arisen the demand in sandstone (silica flux) used in all pyrometallurgical processes at all operations. Partially this demand was satisfied on the account of expensive river sand. As one of the options of this problem solving it was offered to use store sandstone spillage quarried at Kayerkansky surface coal mine. In search of the ways to cope with the increased need for lump sandstone (silica flux) in the Arctic Division of M&MC Norilsk Nickel the Gipronickel Institute has performed studies on the possibility to briquette stored sandstone spillage from Kayerkansky Surface Coal Mine of the Board of Non-metallic Mining Operations. It is envisaged to use spillage briquettes as flux in the process of converting and in electric furnaces to substitute lump sandstone. In the first part of this work were considered the effectiveness of binders, having non-organic origin, as well as the influence of the method of charge preparation and its humidity on briquettes strength properties. In the second part examines the possibility to use liquid lignosulphonate as a binder in sandstone briquetting. Comparative assessment of the effectiveness of nickel sulfate, alkali silicate and lignosulphonate use in sandstone spillage briquetting is done. Binding agent effectiveness is determined by the ratio between its consumption and achievable strength properties of agglomerated material, and also by fin output (material with particles size less than 5 mm). By the results of the performed investigations it was determined that liquid lignosulphonate use is the most effective option in sandstone spillage briquetting. Source


Ozerov S.S.,Gipronikel Institute LLC | Portov A.B.,Gipronikel Institute LLC | Blekhshteyn B.L.,Gipronikel Institute LLC | Tsemekhman L.S.,Gipronikel Institute LLC | Fomichev V.B.,Norilsk Nickel
Tsvetnye Metally | Year: 2013

At the Arctic Division of M&MC Norilsk Nickel has arisen the demand in sandstone (silica flux) used in all pyrometallurgical processes at all operations. Partially this demand was satisfied on the account of expensive river sand. As one of the options of this problem solving it was offered to use store sandstone spillage quarried at Kayerkansky surface coal mine. Due to the fact that spillage particles size from Kayerkansky Surface Coal Mine of the Board of Non-metallic Mining Operations by the class +20 mm is 0%, and by the class-5 mm-70%, its use in the unprepared form in metallurgical processes of Arctic Division is impossible, because of significant dust entrainment and owing to safety requirements. In order to use sandstone spillage from Kayerkansky Surface Coal Mine in metallurgical operations of AD it should be agglomerated. The Gipronickel Institute conducted investigations on the possibility to briquette sandstone spillage from Kayerkansky Surface Coal Mine of the Board of Non-metallic Mining Operations, containing more than 70% SiO2 with the introduction into the agglomerated mixture of different binding agents and without them. The principal target of the investigations was to determine parameters providing production of qualitative lump product-a briquette. Influence on sandstone briquetting of moisture content and the method of mixture preparation was studied. It was discovered that the maximal strength have briquettes made of sandstone spillage, produced with the help of introduction of nickel and copper sulfates water solutions and liquid glass. Necessary condition of the required strength achievement is the stage of strengthening drying. Source

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