Abstract:A new scheme has been put forward to using the waste sulfuric acid discharged from the production of titanium white by the sulfuric acid process as leaching agent for the pretreatment of a platinum-palladium ore before its flotation. The purpose of this scheme is to substitute the fresh acid and activate the flotation of the ore, realizing a comprehensive utilization of the resources. It has been shown that this scheme is feasible and practicable.