刚果(金)低品位氧化铜回收工艺研究

Study on Low Grade Copper Oxide Recovery Process in Congo

对刚果(金)某氧化铜堆存矿回收工艺试验研究表明,在样品含铜1.3%左右,且铜氧化率95%以上的情况下,原矿磨矿至-0.074 mm占65%左右,采用高梯度强磁选机磁选-磁选精矿常温酸浸工艺,获得铜品位8%以上、铜回收率74%以上的磁选精矿。磁选精矿采用硫酸常温浸出,在酸矿比0.15的条件下,铜的浸出率达93%以上,磁选抛尾率接近90%,相比原矿直接酸浸的酸矿比0.6,酸耗大幅降低。磁选-酸浸联合工艺,铜的综合收率达68%以上,实现了铜资源的有效回收与利用。

A stocks copper oxide ore in Congo recycling process test research shows that in the sample containing 1.3%copper,and copper oxidation rate more than 95%of the cases,undressed ore grinding accounted for about 65%,to 0.074 mm high gradient magnetic separation machine room temperature magnetic separation and magnetic separation concentrate acid leaching process,with the grade of copper by more than 8%,the magnetic separation of copper recovery more than 74%of the products.The magnetic separation product adopts sulfuric acid leaching at room temperature.Under the condition of acid ore ratio of 0.15,the leaching rate of copper is more than 93%,and the tail rate of magnetic separation is close to 90%.Compared with the acid ore ratio of 0.6,the acid consumption is greatly reduced.By the combined process of magnetic separation and acid leaching,the comprehensive yield of copper is over 68%,which has achieved effective recovery and utilization of copper resources.