关键词: 混合浮选, 优先选铜, 锌硫分离, 综合回收

Abstract: In order to reduce the zinc content in copper and sulfur concentrate of a magnetite contain⁃ ing copper，zinc and sulfur，aiming at the problem of high zinc content in raw ore，according to the ore properties，the process of mixed flotation，mixed concentrate regrinding，preferential separation of copper， zinc and sulfur separation process was used to comprehensively recover copper，zinc and sulfur in magnetic separation tailings. The final grade of copper concentrate was 30.03%，and the recovery rate of copper was 95.58%. The grade of zinc concentrate was 46.36%，and the recovery rate of zinc was 70.27%. The grade of sulfur concentrate was 45.80%，and the recovery rate of sulfur was 94.12%. The zinc content in copper and sulfur concentrates was significantly reduced，and copper，zinc and sulfur were effectively recovered.

Key words: mixed flotation, copper preferential separation, zinc and sulfur separation, comprehensive recycling