One-step leaching of some refractory gold concentrate containing arsenic and theory analysis

Abstract

A new technology of one-step leaching of refractory gold concentrate containing arsenic and sulfur was studied and 96.8% of gold was extracted in an hour by this technology. Themodynamic possibility of reactions of arsenopyrite, pyrite and gold with sodium hypochlorite in NaOH medium, and solution chemistry of H₃AuO₃ at different pH values were analyzed. The reason why the gold wrapped by FeAsS, FeS₂ can be leached out rapidly by grnding of porcelain ball mill, is explained.

Keywords

refractory gold concentate / sodium hypochlorite / one-step leaching of gold

References

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