Gold leaching by thiosulfate method has the advantages of fast leaching rate,economical price and better environmental pro-tection,which is considered as the most likely alternative to cyanide leaching for gold extraction.In this paper,five copper-containing systems(Cu2+-NH3-S2O32-system,Cu2+-EDTA-S2O32-system,Cu2+-en-S2O32-system,Cu2+-LH-24--S2O32-system,Cu2+-Gly-S2O32-system),and two copper-free systems(Cl--NH3-S2O32-system,Fe3+-C2O42--S2O32-system)and to provide a comparative analysis.Finally,the diffi-culties in the industrial application of gold leaching by thiosulfate method are summarized and the solution measures are proposed to provide theoretical reference for its industrial application.
thiosulfategold leachingcopper-containing systemcopper-free system