Research Progress of Environmental-friendly Gold Leaching Technology Under Neutral and Alkaline Conditions

This article summarizes and sorts out the more common environmental-friendly gold leaching technologies under neutral and alkaline conditions, including alkaline thiourea method, thiosulfate method, glycine method, polysulfide method and thiocyanate method, etc. It is found that the environmental-friendly gold leaching technology has the advantages of short gold leaching time and high gold leaching efficiency, but there are still problems such as high reagent consumption and complex gold leaching environment. On the basis of summarizing the above problems, the development direction of environmental-friendly gold leaching technology research is prospected.