Abstract: In order to optimize the effect of flotation separation for associated Mo-Cu-Bi sulfide ore of Xing Luokeng Tungsten ore, “Mo preferential flotation, Cu-Bi separation after bulk flotation for Mo tailings, recovering Bi by leaching Bi rough concentrate” technological process was adopted and a better experimental index was obtained. The results of closed-circuit test show that Mo concentrate with Mo grade of 45.37% and recovery of 90.46%; Cu concentrate with Cu grade of 23.01% and recovery of 91.03%; Bi concentrate with Bi grade of 62.37% and recovery of 60.09% are obtained. In Comparison with the original process, the recovery of Mo, Cu and Bi is respectively improved above 4 precentate points, 8 precentate points and 52 precentate points.

Key words: Associated Mo-Cu-Bi sulphide ore, Mo preferential flotation, Cu-Bi bulk flotation, Recovering Bi by leaching