Abstract:The effects of the concentrations of thiosulfate,copper and ammonia on the extraction of gold from sulfide gold concentrate have been studied. The results show that it is possible to reduce thiosulfate concentration. More than 95% of the gold could be extracted by a 0.2 mol/L thiosulfate leaching solution in two hours under suitable conditions. Therefore, the process of washing the residue was simplified, and the consumption and loss of thiosulfate carried by the washing residue were reduced.

Key words: gold extraction  thiosulfate  sulfide ore