Method for eluting gold and silver and method for recovering gold and silver using the same

摘要

Gold contained in the sulfide metal ore is efficiently adsorbed on the activated carbon, and gold and silver adsorbed on the activated carbon are efficiently eluted. Using an acidic leachate containing chloride ions and / or bromide ions as anions and copper and iron as cations, heating and leaching gold from the metal-containing / silver sulfide metal ore into the acid leachate; Gold and silver comprising a step of adsorbing at least gold and silver on activated carbon, and a step of eluting gold and silver using an aqueous thiosulfate aqueous solution maintained at a pH of less than 7 with respect to activated carbon on which at least gold and silver are adsorbed Elution method.