Abstract: The useful mineral of an iron ore tailings are mainly pyrite， sphalerite and molybdenite， and the main gangue minerals are garnet， quartz， calcite， etc. In order to recover the useful minerals in the iron ore tailings and realize the high efficient resource utilization， experimental study on mineral processing of the iron ore tailings has been conducted. The results showed that for the iron ore tailings containing 0.86% Zn， 0.023% Mo and 10.09% S， the zinc， molybdenum and sulphur minerals could be recovered from the iron ore tailings by zinc-molybdenum-sulphur bulk flotation with one roughing three cleaning three roughing， and zinc-molybdenum flotation separation from sulphur minerals with one roughing four cleaning one scavenging. With the process concerned above， zinc-molybdenum mixed concentrate of 41.53% Zn and 0.797% Mo with recoveries of 92.87% and 67.26% and sulfur concentrate of 51.75% S with recovery of 91.51% could be obtained.

Key words: Iron ore tailings, Comprehensive utilization, Bulk flotation