Abstract: Useful metal minerals in a copper-lead-zinc polymetallic sulfide ore are mainly galena， sphalerite and chalcopyrite， followed by bornite， azurite， hemimorphite ， anglesite and so on. Mineral processing tests were carried out in order to determine the technological process for recovering copper， lead and zinc. The results showed that one-roughing， three-cleaning and two-scavenging for copper-lead mixed flotation， one-roughing， three-cleaning and two-scavenging for copper-lead separation flotation， one-roughing， two-cleaning and one-scavenging for zinc flotation were adopted when the grinding fineness is 0.074 mm accounted for 75%. The copper concentrate with copper grade of 22.13% and copper recovery of 80.08%， lead concentrate with lead grade of 62.32% and lead recovery of 79.63%， zinc concentrate with zinc grade of 52.56% and zinc recovery of 82.20% were obtained. In the process of copper and lead separation， CHP， an environment-friendly lead combined inhibitor without cyanide or chromium， is the key to realize the efficient separation of copper and lead.

Key words: Copper-lead-zinc sulfide ore, Copper-lead mixed flotation, separation of copper and lead, Environment-friendly inhibitor without cyanide or chromium CHP