the reasons of gold refractory, gold ore classification
4. telluride and sulfur salt gold ore. in order to dissociate telluride and sulfur salt and make the gold' recovery easier, generally, we use hypochlorite chlorination processing, roasting, and pressurized oxidation, this condition of pressurized oxidation is not strict as the conditions of cubic crystal pyrite, arsenical pyrite, and other sulfide with arsenic.