Abstract: Copper grade of copper sulfide ore in Dabaoshan,Guangdong,is low，main metallic mineral chalcopyrite is closely disseminated with pyrite and pyrrhotite.Floatability of pyrrhotite is similar with chalcopyrite.It is hard to have good copper and sulfur separation index via single flotation process.To explore high efficiency separation technology on the refractory copper-sulfide ore，new beneficiation process research was conducted on the process mineralogy of the ore.Results show that with the grinding fineness of 80.10% passing 0.074 mm，by one roughing-three scavenging copper flotation，rough concentrate ground to 90% passing 0.074 mm and via magnetic separation to removal pyrrhotite，non-magnetic product through three stages copper cleaning flotation，qualified copper concentrate with 18.57% copper and recovery of 80.26%，copper scavenging flotation tailings via one roughing-one scavenging sulfur flotation，and combined with magnetic products，sulfur concentrate with sulfur grade of 45.35% and recovery of 87.12% was obtained，effectively separation of copper and sulfur was obtained.

Key words: Chalcopyrite, Pyrrhotite, Magnetic-float technological process