Abstract: The composition of Yimen copper smelting slag was complex,with Cu grade of 1.83%.Main copper minerals are copper sulfide,accounting for 94.54% of total copper.In order to high efficiently recover copper,mineral processing tests were carried out.The results showed that,at the grinding fineness of the -0.045 mm accounted for 90%,through the process of one roughing-three cleaning-two scavenging,copper concentrate with copper grade of 18.27% and recovery of 84.86%,and silver grade of 76.20 g/t and recovery of 44.06% was obtained separately.The beneficiation process selected is simple,which can better recover the copper,and comprehensively recover the silver.It is the ideal process for copper recovery from the sample.

Key words: Copper smelting slag, Copper sulfide, Grinding,Flotation