CHINA MINE ENGINEERING

A polymetallic ore occurring in Qinghai grades 0.061% Cu, 1.04% Pb, 3.03% Zn and 32.76% Fe, and contains multiple minerals, including galena, sphalerite, magnetite, pyrrhotite, etc. The comprehensive utilization of these minerals is of high difficult. Considering the properties of the ore, the process flow of Cu-Pb bulk flotation-magnetic separation-magnetic concentrate desulfurization-Zn separation from magnetic tailings was adopted, achieving the comprehensive utilization of each composition of the ore. Under laboratory conditions, the Cu-Pb bulk concentrate grading 2.19% Cu and 60.72% Pb, with Cu and Pb recovery respectively as 46.16% and 90.98%, the Zn concentrate grading 45.16% Zn with Zn recovery of 88.94%, and the Fe concentrate grading 66.35% Fe and 0.10% S can be obtained.