刚果（金）某高泥高氧化率铜矿石选矿试验

铜品位为3.70%的刚果（金）某高泥氧化型铜矿石的氧化率达75.81%，主要铜矿物为孔雀石，其次为硅孔雀石、辉铜矿等。为了确定该矿石的合适选矿工艺流程，进行了选矿试验。结果表明：矿石在磨矿细度为-74 μm占70%的情况下采用1次浮选脱泥、2粗2精2扫硫化浮选工艺处理，可获得铜品位为26.82%、铜回收率为72.48%的铜精矿；以硅孔雀石为主要含铜矿物的浮选尾矿采用摇瓶酸浸工艺处理，在硫酸用量为100 kg/t、液固比为3∶1、浸出时间为2 h的情况下，铜作业浸出率可达86.84%；浮选+酸浸工艺的总铜回收率为96.38%。

Beneficiation on High Mud and High Oxidation Copper Ore From Congo (Kinshasa)

A high mud and high oxidation copper ore form Congo(Kinshasa) with copper grade of 3. 70%,and the oxi-dation rate reach 75. 81%. Copper mainly exists in the form of malachite,follows by chrysocolla and chalcocite. The technical conditions for flotation of the ore are explored. The results show that with the grinding fineness of 70% -74 μm,via one stage flotation for desliming,two roughing,two cleanings,and two scavenging sulfuration floatation,copper concentrate with copper grade of 26. 82% and recovery of 72. 48% was gained. The flotation tailings with which the main copper minerals is chrysocolla can be processed by acid leaching process. With sulfuric acid dosage of 100 kg/t,liquid-solid ratio of 3 ∶ 1 and leaching time of 1. 5 h,the copper leaching rate of 86. 84% is obtained relative to tailings,and the total copper recovery of the whole process of flotation+ acid leaching is 96. 38%.