某低品位斑岩铜矿短流程工艺优化试验及工业应用研究

Short-Flowsheet Process Optimization Test and Industrial Application of Low Grade Porphyry Copper Ore

江西某铜矿原矿品位低,属典型的大型斑岩铜矿,近年来随着开采逐步深入,矿石愈发难磨,有用矿物单体解离度逐渐降低,严重影响了生产指标。据流程考查结果可知,尾矿中损失的铜大部分赋存在粗粒级中,其中+0.097mm粒级的铜金属分布率高达59.71%。为了充分回收尾矿中损失的铜,进一步提高选铜回收率,结合大型浮选机,开展短流程优化工艺试验及工业应用研究。通过缩短主干流程,强化矿浆调节,有针对性地加强粗颗粒回收,开展了详细的实验室试验及工业试验研究,实验室试验采用短流程优化工艺后获得的铜回收率相比生产工艺提高了1.04个百分点,工业试验累计指标相比优化前正常生产提高了1.02个百分点。

A copper mine in Jiangxi Province is a typical large porphyry copper mine with low ore grade.In recent years,with the gradual deepening of mining,the ore becomes more and more difficult to grind,and the dissociation degree of useful mineral monomer decreases gradually,which seriously affects the production index.According to the results of field process examination,most of the copper lost from tailings occurs in the coarse grain size,among which the copper distribution rate is as high as 59.71%in the+0.097mm size.In order to fully recover the lost copper in tailings and further improve the recovery rate of copper separation,the short flow optimization process test and industrial application research were carried out with the large flotation machine on the concentrator.By shortening the main flow,strengthening the pulp regulation,and strengthening the coarse particle recovery,detailed laboratory and industrial tests were carried out.The copper recovery obtained by using the optimized process of short flow in the laboratory test was increased by 1.04 percentage points compared with the production process,and the cumulative index of industrial test was increased by 1.02 percentage points compared with the normal production.