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Vol. 18 (2015 year), No. 2

Svetlov A. V., Potapov S. S., Potapov D. S., Kravchenko E. A., Erokhin Yu. V., Potokin A. S., Selivanova E. A., Suvorova O. V., Kumarova V. A., Nesterov D. P., Makarov D. V., Masloboev V. A.
Investigation of possibility of recovery nonferrous metals and producing building materials from copper-nickel smelterslag

Pelletized slag of copper-nickel smelter ("Pechenganikel" combine, "Kola MMC" JSC) has been investigated as a potential technogenic deposit. It has been shown that nonferrous metals can be re-extracted from slag using flotation. The work presents the results of laboratory simulation of heap leaching of non-ferrous metals. Ceramic building materials from slag-based feed have been produced and their main properties have been studied

(in Russian, стр.10, fig. 6, tables. 4, ref 18, Adobe PDF, Adobe PDF 0 Kb)

Vol. 20 (2017 year), No. 1, DOI: 10.21443/1560-9278-2017-20-1/2

Svetlov A. V., Makarov D. V., Potapov S. S., Nekipelov D. A., Seleznev S. G., Masloboev V. A.
Research of leaching of disseminated copper-nickel ores in their interaction with mine waters

A great amount of mine waste creates serious problems for economy and ecology in mining regions. Keeping of dumps and tailings storages requires huge capital costs and material inputs. Removal of overburden volumes cause ecological disequilibrium, ingress of chemical agents and heavy metals in ground and surface water have an adverse influence on eco-systems and human health. These hazards are particularly high under extreme climatic conditions, when mines create vast desert lands around themselves. Foreign researchers use the terms "acid mine drainage" (AМD) and "acid rock drainage" (ARD) when speaking on mine water oxidation and contamination of the environment with heavy metals. AMD is induced by underground mine drainage, natural sulfide-bearing rock exposures, etc. The processes occurring in the interaction the mine water with fine dust particles, as well as water filtering through the thick sulfide rocks have been studied. It has been shown that the reduction in potential environmental hazard of mine water of JSC "Kola MMC" is achieved through precipitation of heavy metals by iron hydroxide and magnesium hydrosilicate. Preliminary assessment of the feasibility of hydrometallurgical processing of disseminated copper-nickel ores has been made

(in Russian, стр.12, fig. 8, tables. 1, ref 16, Adobe PDF, Adobe PDF 0 Kb)

Vol. 21 (2018 year), No. 1, DOI: 10.21443/1560-9278-2018-21-1

Fokina N. V., Yanishevskaya E. S., Svetlov A. V., Goryachev A. A.
Functional activity of microorganisms in mining and processing of copper-nickel ores in the Murmansk Region

The quantitative indices and structure of the microbial community in flotation samples of sulfide copper-nickel ores at concentration plant of Kola Mining and Metallurgical Company have been determined. The smallest number of saprotrophic and oligotrophic bacteria has been observed in samples of ore and recycled water, which can be explained by the low temperature of samples and the lack of nutrients. It has been found out that the bacteria contained in the ore and recycling water flowing from the tailings increased their number during the flotation process due to coming of the organic compounds with the flotation reagents, aeration and increased temperature. Dominating strains have been isolated from recycled water and basic flotation products and classified as Pseudomonas. It has been shown that with an increase in the number of bacteria, the flotation time of copper-nickel ores increases. There is also a tendency to change the extraction of copper and nickel, which can be caused by both the increase in the flotation time for operations and the change in the number of bacteria in the circulating water. The thionic bacteria have been distinguished from the flow tailings of the Allarechensk deposit. The heap leaching experiments have proved the bacterial leaching to give good results on the ore samples passed through magnetic separation, having shown high content of the nickel and copper in filters. When leaching low-grade ore of the Nude Terrasa, the advantage of bacterial leaching use in comparison with the sulphuric-acid leaching only to copper has been revealed. The nickel content in the filtrates for bacterial leaching is 275 mg/l, and for sulfuric acid – 310 mg/l. The average copper content in the filtrates is 19 and 15 mg/l.

(in Russian, стр.7, fig. 2, tables. 1, ref 12, adobe PDF, adobe PDF 0 Kb)