Mineral processing technology for recovering gold and silver from sulfide concentrate

The invention belongs to the technical field of beneficiation, and particularly relates to a beneficiation process for recovering gold and silver from sulfide concentrate. The method comprises the following steps: firstly, carrying out reagent removal treatment on the sulfide concentrate by adopting a reagent removal agent, then, carrying out regrinding until the specified fineness is achieved, then, adding a passivating agent or an inactivating agent to passivate the surface of the non-gold and silver-loaded mineral, and finally, adding multiple flotation reagents to carry out flotation operation for multiple times, so that the high-grade gold and silver concentrate is separated from the sulfide concentrate. The method lays a foundation for a production process for directly selecting precious metals such as gold and silver from the sulfide concentrate. Compared with the prior art, the technical scheme provided by the invention has the advantages of low cost, simplicity in operation, high gold and silver extr