FIELD: metallurgy.
SUBSTANCE: proposed method comprises ore pretreatment by crushing, classification and grading, biological degradation of ore silicate minerals by multiple ore interaction with silicate bacteria cultural medium without mixing with replacement of said cultural medium at pH, at least, 0.4. Then, metals are leached from biological degradation cakes by cultural solutions after extraction of silicon therefrom and additions of sulfuric acid to concentration of 50-450 g/l. After leaching, metals are extracted form cake leaching solution. Note here that cultural medium is replaced on reaching redox potential in solution of minus 250 mV. After biological degradation and before leaching, cakes are flushed with water.
EFFECT: higher degree biological degradation, yield of metals, and lower costs.
10 cl, 2 ex
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