Abstract: Taking a copper-lead-zinc complex refractory polymetallic pyrite ore as a study object,on the basis the ore study process mineralogy,a large number of exploration experiments were carried out. The results showed that under the condition of raw ore containing Cu 0.18%,Pb 0.27%,Zn 1.45%,S 14.09%,copper concentrate with Cu grade of 10.68% and recovery rate of 41.65%,lead concentrate with Pb grade of 42.88% and recovery rate of 80.04%,zinc concentrate with Zn grade of 42.04% and recovery rate of 84.11%,and sulfur concentrate with S grade of 40.21% and recovery rate of 62.64%,via copper,lead,zinc and sulfur preferential flotation closed circuit test in which Zn cleaning with flotation-magnetic separation combined flowsheet,and the comprehensive utilization of the ore was realized.

Key words: Copper-lead-zinc polymetallic pyrite ore, Preferential flotation, Flotation-magnetic separation combined process