METHOD OF DISSOLVING NON-FERROUS METALS CONTAINED IN A SULPHIDE ORE OR CONCENTRATE

摘要

1478571 Treating sulphide ores SOC MINIERE ET METALLURGIQUE DE PENARROYA 15 May 1975 [15 May 1974] 20571/75 Heading ClA Non-ferrous metals contained in a sulphurized ore or concentrate are selectively dissolved by a method which comprises lixiviating the ore or concentrate with an aqueous cupric chloride solution and regenerating cupric ions from the cuprous ions formula in the solution, preferably in situ by means of gaseous oxygen, preferably air at atmospheric pressure, together with HCl and/or FeCl 2 . The redox potential is preferably 400-800 mV w.r.t. the hydrogen electrode, and the pH is # 1 when HCl and FeCl 2 are both present and # when HCl alone is used. The metals dissolved may be copper, lead or zinc. Gaethite (FeO.OH) is precipitated in the regeneration step when iron is present.