提高某低品位铜矿石选铜回收率试验研究

Test study on improvement of copper recovery ratio of a low-grade copper ore

针对福建某低品位铜矿石,通过对矿物性质及原工艺流程的诊断分析,采用"粗磨-快速浮选-快浮尾矿异步浮选-粗精矿再磨再选"的联合工艺,能有效保证了已解离的目的矿物优先回收,同时还使得难选铜矿物及含铜连生体矿物得到充分回收。新工艺流程获得了含铜24.09%、含金6.48 g/t、铜回收率为92.69%、金回收率为60.54%的铜精矿,铜回收率提高了3.87个百分点,金回收率提高了13.61个百分点。

After the diagnosis and analysis on mineral properties and original process flow of a low-grade copper ore from Fujian, the process flow involving rough grinding, rapid flotation, asynchronous flotation of tailings of rapid flotation, re-grinding and re-separation of rough concentrate in sequence was applied to effectively ensure the preferential recovery of dissociated target minerals as well as ample recovery of refractory copper minerals and copper-bearing coenobium minerals. After application of the new process flow, the copper concentrate with copper content of 24.09%, gold content of 6.48 g/t, copper recovery ratio of 92.69% and gold recovery ratio of 60.54% was obtained. Thus the copper recovery ratio increased by 3.87 percentage points, and the gold recovery ratio increased by 13.61 percentage points.