某含铜尾矿粗砂工艺矿物学特征及选矿试验研究

为查找铜损失在尾矿中的原因并制定选矿回收工艺，对某低品位含铜尾矿粗砂进行了工艺矿物学分析和选矿试验研究。结果表明：含铜矿物主要是黄铜矿（CuFeS2），嵌布粒度微细且呈浸染状分布，未能充分单体解离而损失在尾矿中。经过选矿优化试验确定粗尾砂可采用立式搅拌磨，使微细粒级铜矿物充分单体解离；然后，采用优先浮选工艺回收铜，闭路试验可获得Cu品位18.02%、Cu回收率41.05%的铜精矿。

Experimental Study on Mineralogical Characteristics and Beneficiation Process of a Copper Bearing Tailings

In order to find out the cause of copper loss in tailings and formulate the beneficiation recovery process, the process mineralogy analysis and beneficiation test of a low-grade copper bearing coarse tailings were carried out. The results show that the copper bearing mineral is mainly chalcopyrite, which is lost in the tailings due to the incomplete monomer dissociation and the fine embedded particle size and disseminated distribution. Through the beneficiation optimization test, it is determined that the micro fine copper minerals can be fully separated from the coarse tailings by the vertical agitating grinding mill, and the copper can be recovered by the preferential flotation process. The closed circuit test shows that copper concentrate with copper grade and recovery of 18.02% and 41.05% respectively were obtained.s