NOUFERROUS METALLURGICAL EQUIPMENT

The primary grading overflow product of copper dressing tailings of Wushan Copper Mine contains 6.39% pyrite, -0.023mm accounting for 86.00%, which belongs to extremely fine-pyrite. In order to reduced the loss of pyrite in tailings and simplified process flow, a special fine flotation equipment was used to recover the pyrite in tailings. In the flotation test，butyl xanthate was used as the collector and BK204 as the foaming agent, the intermediate ore was sequentially returned for a “two coarse, two sweep, and two fine” closed circuit test. The concentrate had an S grade of 46.16% and a recovery rate of 81.25%. The expansion experiment used pre-strength modified slurry and BGRIMM specialized high-efficiency fine particle flotation equipment. After the “two coarse, one sweep, and two fine” operation, the concentrate contents 46.02% pyrite, and the pyrite recovery rate was 85.76%.