FIELD: metallurgy.
SUBSTANCE: proposed method comprises leaching and oxidising concentrated by alkaline solutions of sodium or potassium ferrocyanide in heating. Note here that oxidising and leaching are performed simultaneously in single step at 80-90°C with the help of alkaline solutions of sodium or potassium ferrocyanide that contain oxidisers represented by lime chloride or alkaline metal or ammonia persulphate. In leaching, solutions pH is kept in the range of 12.5 to 13.5.
EFFECT: invention allows said processes to occur at lower temperatures and atmospheric pressure, high selectivity of gold extraction.
6 cl, 1 tbl, 13 ex
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