Investigation of Hypergene Processes in Copper and Nickel Sulphide Ore Concentrating Tailings
V. T. KALINNIKOV1, V. N. MAKAROV1, S. I. MAZUKHINA2, D. V. MAKAROV1 and V. A. MASLOBOEV2
1Institute of Chemistry and Technology for Rare Elements and Mineral Raw Materials,
Kola Science Centre, Russian Academy of Sciences, Ul. Fersmana 26a, Apatity 184209 (Russia) E-mail: mdv-2002@mail.ru
2Institute of North Industrial Ecology Problems, Kola Science Centre,
Russian Academy of Sciences, Ul. Fersmana 14, Apatity 184200 (Russia)
Pages: 515-519
Abstract
Hypergene processes in the waste products of concentration of copper and nickel ores (tailing dumps in the Afrikanda settlement, Murmansk Region) were investigated by means of physicochemical modelling using the Selektor software. New formations in the solid phase are represented by goethite (over sulphides) and three-layered layered silicates. The appearance of gypsum is observed in the case of substantial interaction. The concentration of nickel in the pore fluid exceeds the MPC even under a 0.01 % change in volume. The results indicate that the concentrations of heavy metals are rather high in pore fluid, though its pH is higher than 8 as a mean in all the samples, which brings real danger to the environment.
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