Abstract: Hekou copper ore in Yunnan contains Cu grade of 0.59%, S grade of 4.57% and Fe grade of 26.98%.It belongs to the S-Fe associated low grade copper sulphide ore, among which Cu, S and Fe exist in the form of chalcopyrite, pyrite and magnetite respectively.But there are a small amount of chalcopyrite and pyrite formed solid solution.Comprehensive recovery tests of copper, sulfur and iron were conducted by the process of copper-sulfur bulk flotation, copper-sulfur separated flotation, and low intensity magnetic separation of flotation tailings.Then, copper concentrate with Cu grade of 18.03% and Cu recovery of 93.07%, sulfur concentrate with S grade of 52.02% and S recovery of 52.02%, and iron concentrate with Fe grade of 61.90% and Fe recovery of 27.38% were obtained separately.This provides a technical basis for development and utilization of the ore.

Key words: S-Fe associated low grade copper sulphide ore, Copper-sulfur bulk flotation, Copper-sulfur separated Flotation, Low intensity magnetic separation