Abstract: The run-of-mine ore contains valuable minerals such as iron, sulfur and copper minerals. It is characterized by several recoverable minerals, high pyrrhotite content and complex ore properties. Flotation reagents were used to improve the floatability of pyrrohotite so as to control the sulfur content of the feed to the low intensity magnetic separation within a low range. A process combining grinding, low intensity magnetic separation and flotation was used and qualified iron concentrate, high-sulfur iron concentrate, sulfur concentrate and copper concentrate were finally obtained.

Key words: Complex multi-metal ore, Iron separation by low intensity magnetic separation, Sulfur removal by flotation, Beneficiation process