Gipronikel Institute LLC

Saint Petersburg, Russia

Gipronikel Institute LLC

Saint Petersburg, Russia
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Talalov V.A.,Polytechnic University of Mozambique | Rumyantsev D.V.,LLC Gipronikel Institute | 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.


Tsemekhman L.Sh.,LLC Gipronikel Institute | Tsymbulov L.B.,LLC Gipronikel Institute | Pakhomov R.A.,LLC Gipronikel Institute | Popov V.A.,LLC Gipronikel Institute
Tsvetnye Metally | Year: 2016

Current production and investigation data allow rather correct assessment of nickel, copper, cobalt, iron and sulfur behavior during the pyrometallurgical processing of various copper-nickel concentrates. At the same time, behavior of platinum and noble metals on main pyrometallurgical stages is still insufficiently investigated. There are shown the investigation results of distribution of platinum group metals (such as platinum, palladium, irridium, rhodium and ruthenium) in slag and matte of copper and nickel concentrates, depending on nonferrous metals content in matte. Mixture of copper and nickel concentrates was used for investigations, and its oxidation smelting was held in Tamman furnace. There was defined the optimal content of copper and nickel in matte, when concentration of platinum group metals in matte is high, and their distribution coefficients have almost no changes (losses with slags are proportional to their content in matte). Thermodynamic model for assessment of distribution and extraction of nickel, copper and platinoids during copper-nickel raw material processing was developed using the software FactSage 6.3.1. This model shows a good convergence with experimental investigations data, which corresponds about its usability for forecast calculations, connected with distribution of non-ferrous and platinum metals between smelting products (slag and matte).


Ozerov S.S.,LLC Gipronikel Institute | Portov A.B.,LLC Gipronikel Institute | Tsymbulov L.B.,LLC Gipronikel Institute | Mashyanov A.K.,JSC Kola MMC
Tsvetnye Metally | Year: 2017

Nowadays, the section of briquetting of bulk copper-nickel concentrate is accepted for industrial operation in Kola MMC. Liquid technical lignosulfonate is used as a binder in briquetting. During the mastering of briquetting technology, there was set a range of problems, connected both with technological properties of binder, and with necessity of optimization of exploitation costs. Industrial control data set the episodic worsening of mechanical properties of briquettes (compressive strength and impact resistance) without any clear technological variations in the process. One of these possible reasons is the deviation of binding properties of lignosulfonate with supplier change. Besides, nowadays lignosulfonates, used as binders, are transferred from the category of cheap production wastes into the category of popular technical materials, which, simultaneously with deviation of strength characteristics, is negatively caused on industrial and economic constituent of the production stage. This paper searched the indirect indicators and criteria, which may be the basis of assessment of binding properties of lignosulfonate without any testings. Chemical composition, pH and slurry viscosity are the criteria, potentially influencing on binding properties of lingnosulfonate. According to the investigations there was set the grade of influence of each investigated indicator on the strength of obtained briquettes. One of the easiest controllable indicator is pH.


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.


Ozerov S.S.,LLC Gipronikel Institute | Portov B.,LLC Gipronikel Institute | Tsymbulov L.B.,LLC Gipronikel Institute | Mashyanov A.K.,JSC Kola MMC
Tsvetnye Metally | Year: 2016

Nowadays, Kola MMC started the industrial exploitation of the site of briquetting of bulk copper-nickel concentrate. Process flowsheet foresees the primary dehydration of the concentrate pulp on press-filters, supply of binder (liquid lignosulfonate) and its mixing with the concentrate, drying of obtained mixture, secondary introduction of lignosulfonate and briquette formation on rolling briquette-press. Currently, technical lignosulfonate, used as binder, started to be not the cheap and accessible production wastes, but the highlydemand technical materials, which makes a negative effect on economic part of the production stage. The urgent issue of the briquetting site is the optimization of the consumption of rated materials (binder consumption, in particular). Searches of alternative types of binders are carried out. The investigations were carried out on the rolling press B050 (K. R. Komarek Inc.). Water solutions of polyvinyl alcohols (various grades and manufacturers) were used as binder during the rolling briquetting of bulk copper-nickel concentrate. A key factor, defining the efficiency of using the polyvinyl alcohol as binder, is the polymerization grade: The higher it is, the lower is the consumption of polyvinyl alcohol, required for the qualitative briquettes obtaining. From the other hand, increasing the grade of polymerization of polyvinyl alcohol leads to its viscosity. This, in combination with its low concentration in solution can create certain problems in operation of industrial equipment for the charge preparation to briquetting.


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.


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.

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