FIELD: metallurgy.
SUBSTANCE: procedure for extraction of metals from silicate nickel ore consists in preparation of silicate nickel ore by crushing and classification, in silicon leaching from ore with cultural medium of silicate bacteria and in successive extraction nickel from cake. Silicate minerals of ore are bio-degraded at leaching silicon with cultural medium of silicate bacteria; bio-degradation is performed at pH as high, as 4, without mixing and with replacement of cultural medium. Nickel is extracted from cake of bio-degradation by leaching with utilisation of solution of bio-degradation upon silicon has been extracted from it and by adding sulphuric acid to concentration 50÷450 g/l. Further, metal is extracted from leaching solution of cake bio-degradation.
EFFECT: increased extraction of nickel from silicate ore, raised rate and efficiency of silicate nickel ore leaching.
7 cl, 2 ex
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