Danilova A.S.,LLC Institute Gipronickel |
Parshukov A.B.,LLC Institute Gipronickel |
Mashkovich K.I.,Norilsk Nickel |
Kalinina O.V.,LLC Integral
Tsvetnye Metally | Year: 2015
Authors have systematized the experience of Institute "Gipronickel" in the course of development of design documentation, regulating maximum permissible emission for transport infrastructure of "Norilsk Nickel" MMC and mining, processing and metallurgical enterprises, located on its territory. There is considered the necessity of environmental monitoring of Norilsk industrial region (air basin, in particular). All stages of environmental documentation development for vehicle pools and transport infrastructure of Polar Division of "Norilsk Nickel" MMC are detaily described (from inventory to the "Project of maximum permissible emission standards"). There are considered the peculiarities of accounting of vehicle pollution in environmental documentation. There is given the comparison of surface air background pollution level at Norilsk residential area boundary, and vehicle pools generated pollution. The software package, used for calculation of surface pollution values, is described. There are given the results of air pollution level calculations at residential areas of Norilsk industrial region (per each major pollutant). There is given the assessment of necessity of environmental protection. Effect of the transport infrastructure on environmental pollution level is analyzed. On the basis of developed documents, the enterprise got the air emissions permit for the 2014-2018 period, related to the vehicle pools and transport infrastructure of Polar Division of "Norilsk Nickel" MMC.
Paretskiy V.M.,LLC POLAR Engineering |
Ptitsyn A.M.,LLC POLAR Engineering |
Tsemekhman L.Sh.,LLC Institute Gipronickel |
Tsymbulov L.B.,LLC Institute Gipronickel
Tsvetnye Metally | Year: 2016
Finely-ingrained refractory sulfide-oxide copper-nickel ores, containing a large amount of platinum group metals, are considered as platinum-palladium ores, instead of copper-nickel ores. This principle became the basis of technology of two-stage smelting of these ores in two-zone Vanyukov furnace, providing the higher extraction of platinum group metals, in comparison with the concentration-metallurgical scheme. On the basis of literature review and results, carried out before the experimental investigations of platinum group metal distribution between the products of pyrometallurgical processing of copper-nickel concentrates, there was carried out the adaptation of thermodynamic model of the software complex FactSage 6.3, connected basically with the accounting of mechanical loss of platinum group metals with dump slags. On its basis, there were defined the coefficients of distribution of platinum group metals between the smelting products of Taimyr oxide-sulfide ores, taking into account the influence of the change of slag and matte mass ratio on distribution of non-ferrous and platinum group metals, because the mass ratio of obtained matte and slag are the main difference of this ore melting type. The forecast calculations of material and energetic balances were carried out. The process flow diagram was designed, and the initial data were made for the development of technological regulations of processing of 1 mln tone of Taimyr oxide and sulfide ore per year. Preliminary technical-economic assessment of created production was carried out.
Portov A.B.,LLC Institute Gipronickel |
Ozerov S.S.,LLC Institute Gipronickel |
Tsymbulov L.B.,LLC Institute Gipronickel |
Mashyanov A.K.,JSC Kola MMC
Tsvetnye Metally | Year: 2016
The usage of iron sulfates, non-ferrous metals and sulfuric acid as binders in briquetting of Kola MMC's copper-nickel concentrate is relevant as these are products and intermediates in metallurgical production, so we can expect that their usage may lower the cost value of briquettes. The paper researches the briquettability of Kola MMC's ore copper-nickel concentrate with sulfate and sulfuric acid binders, determines the optimal conditions for obtaining the briquettes of a required durability, forecasts the usage of such binders in industrial production of briquettes. The briquettability of ore copper-nickel concentrates with different storage lives was researched on a laboratory rolling press. Sulfuric acid and iron sulfate solutions, copper, and nickel were used as binding agents. The influence of ageing of the briquettes (in natural conditions) on their qualitative characteristics was estimated. The basic determinable characteristic of the briquettes was their compressing strength. The most effective binding agents have thus been established: sulfuric acid and trivalent iron sulfate. The optimal moisture of a briquetted charge with sulfuric acid and sulfate binders in the case of a fresh concentrate is 3.0- 3.3%. Extension of storage life of the concentrate results in lowering of the optimal moisture. The maximum hardening of the briquettes during the process of ageing is achieved when sulfuric acid and trivalent iron sulfate solutions are used as binders. During the process of ageing the briquettes with a sulfuric acid binder absorb the atmospheric moisture, whilst the briquettes with a sulfate binder lose it. The analysis of side factors suggests that the briquettes have a low impact resistance.
Popov V.A.,Institute Gipronickel LLC |
Tsemekhman L.Sh.,Institute Gipronickel LLC |
Velyuzhinets G.A.,Norilsk Nickel |
Fomichev V.B.,Norilsk Nickel
Tsvetnye Metally | Year: 2014
Thermodynamic modeling of copper cake manufacturing process is performed for the conditions of copper plant of Polar Division of "Norilsk Nickel" MMC. Copper cake was preliminary produced in Harjavalta plant (Finland). Depending on consumption of process-introduced cake, the matte and slag compositions, formed in Vanukov furnace, were calculated. There was made an indication, that extraction of arsenic to different semiproducts is changed according to increasing of cake consumption. Distribution of arsenic among the matte converting products was calculated for the first and second processes (first process is "white matte" receiving, second process is coarse copper receiving). There was shown, that during the first converting period, 60% (wt.) of arsenic is transferred to the "white matte", and 40% (wt.) of arsenic is returned to the slag. Extraction of arsenic to the gas phase is not too large. During the second period, the main part of arsenic (near 70%) was transferred to the coarse copper, and 30% of arsenic was in the slag phase with a negligible extraction to the gas phase. The distribution of arsenic between semiproducts is almost independent of its content in system. Distribution of arsenic among the products of anode melting process of coarse copper was also calculated for two periods: oxidizing stage (removing of impurities from alloy to the slag), and reducing stage (removing of oxygen and dissolved gases from alloy). During the first stage, almost whole part of arsenic stays in the alloy (to 91-92%), and alloy desoxidation has almost no influence on arsenic distribution. Thermodynamic analysis results have shown, that during the treatment of Harjavalta cake, the main part of arsenic (near 91%) is removed to the dump slag of Vanukov furnace in investigated composition range. Direct arsenic extraction to anode copper is near 2.7%. Together with nickel slag, small part of arsenic (1%) is delivered to nickel plant. Based on the arsenic content in cathode copper, there is possible to treat no more, than 10% of Harjavalta cake (from the total amount of concentrate). Under arsenic treatment in larger amount, the received alloys don't pass the requirements to the M00k (M00?) copper in matter of arsenic content.
Ozerov S.S.,Institute Gipronickel LLC |
Portov A.B.,Institute Gipronickel LLC
Tsvetnye Metally | Year: 2014
Nowadays, fine grained and finely dispersed materials are mostly processed in metallurgical production. Fine materials are the products of deep concentration, reverse materials, technogenic wastes, which have not been involved into processing earlier. First of all, necessity of using of these materials is explained by their quantitative content of valuable components. Involving of fine grained materials in processing is complicatedby their physical state. Firstly, some of melting facilities, such as ore-thermal furnaces and blast furnaces, are not designed for fine material processing. Secondly, there is a problem, associated with transportation of finely dispersed material from mining place or stockpile straightly to metallurgical aggregate. Transportation can be carried out with the help of pulp feed-line (this method is implemented at Polar Division of Norilsk Nickel). However, its construction and operating requires high capital and operating costs, affecting the metal production costs, and technologcally and economically unjustified. That is why, the prior sintering, namely briquetting, is supposed to be a successful method of involving of fine materials into processing. This article describes the assessment of influence of key briquetting parameters, based on analysis of published and privately accumulated experimental data.
Zotikov O.V.,Institute Norilskproekt LLC |
Vasilev Y.V.,Institute Gipronickel LLC |
Vlasov V.A.,Institute Gipronickel LLC |
Platonov O.I.,Institute Gipronickel LLC |
Tsemekhman L.S.,Institute Gipronickel LLC
Tsvetnye Metally | Year: 2013
Dynamic specifications of the composition of Vanukov Furnace (VF) waste sulphur dioxide gas were defined, along with analysis of conditions and factors of its formation in order to the development of technical requirements to the means of control and management of technological process at the Elemental Sulphur Production Shop (ESPS) of the Copper Plant (CP) of Polar Division of Norilsk Nickel MMC. During the researches, there was used the Gas Analyzer EMG-30-1, produced by METTEK JSC (Saint-Petersburg, Russia) on the basis of the time-of-flight mass-spectrometer. Prior to the researches, the time constant ? of measuring system of the Gas Analyzer EMG-30-1 (including the time for the drying and transportation of sample) was defined during the lab-scale modelling of the ESPU actual conditions. The determined time constant ? value accounted 30 sec. Frequency specifications of sulphur dioxide gas fluctuations at the ESPS input were determined on the basis of autocorrelation time function for the concentration values [SO2] in waste gas, registered by the Gas Analyzer EMG-30-1. The interval of sequential counts (?t) of the analysed concentration of elements (N2, O2, SO2, CO2, Ar) accounted 30 sec. It was revealed that the high frequency fluctuations in the composition of VF waste gas with the periods of less than 5 min are caused by the air inflow into the smelting unit and into the VF waste gas flue. Changes in composition of VF sulphur dioxide gas, which were generated above the VF melt and caused by the changes in the VF process conditions, are the reasons for other variations occurring at relatively low frequency, with the periods of 15-20 min. There was developed the empirical model of the composition of VF waste gas. This model determines the concentrations of oxygen and sulphur dioxide in the gas flue, based on the concentration of sulphur dioxide gas, generated above the VF melt. The research results were used as the basis for the ESPS Process Control System circuit. Moreover, these results can be used for the diagnostics of the VF smelting process.