Abstract: Based on the process mineralogy research on a polymetallic Cu-Zn sulphide ore,carried out the systemic recovery test of copper and zinc according to the flowsheet of floating Cu and inhibiting Zn.The results indicate that take the process flowsheet of one roughing,one scavenging two a cleaning to float copper, one roughing,two scavenying and three cleaning to float and the middlings ordinal returning for processing the polymetallie sulphide ore.A copper concentrate with grade at 24.23% and recovery at 89.92% and a zinc concentrate with 53.55% grade and 81.87% recovery are obtained.

Key words: Separation of copper and zinc, Preferential flotation, Combined inhibitor