2004•Hydrometallurgy of ChinaRequires access

Extracting of Gold from Refractory Gold Concentrate by Bacteria Oxidation and Cyanide Leaching

L Wang

Abstract

The problem of ore heap penetrability lowly is resolved by intermingling framework material prorata in ore heap. Ore in column is pre-oxidated with selective bacteria,then leached with cyanide. Gold leaching is increased from 62.88% by conventional cyanide leaching to 96.41%. The results show that gold extraction cost can be decreased through static state oxidation and cyanide leaching to refractory at suitable conditions.

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Key concepts: Heap leaching, Gold extraction, Cyanide, Gold ore, Leaching (pedology), Lixiviant, Gold cyanidation, Chemistry