Experimental study on thiosulfate leaching of gold from a high copper gold concentrate

The conventional cyanide leaching process is used to extract gold from a high copper concentrate. Because the associated minerals consume sodium in large quantities, cost of reagents and economic benefit not ideal. At same time, number tail slag are produced, which brings series environmental problems. In order solve problems caused by excessive consumption cyanogen slag, feasibility thiosulfate ammonia system was studied. rate increased more than 90% using direct pretreatment process, close index at production site.