贵州某地混合铜矿选矿试验研究

摘要

A beneficiation test of a sulfide-oxidized copper ore from Guizhou was studied.Ore milling grade is Cu:1.27%,Ag:3.80g/t,As 4.46g/t and the oxidation rate of copper is 23.87%.It belongs to the mixed copper.According to the ore properties,a comparative test was performed on the three kinds of copper extraction processes,which are oxygen sulfur mixture,oxygen sulfur separation and flotation tail-ings acid leaching.The results show that copper concentrate grade of 20.52% and recovery of 73.05%;copper grade of 880.00 mg/L,leaching rate of 14.16% in medium and the total recovery of 87.21% was achieved through the whole closed trial,which was flotation,tailings acid leaching.%对贵州某地混合铜矿石进行了选矿试验研究。原矿入选品位 Cu 1.27％、Ag 3.80 g／t，含 As 4.46 g／t，铜氧化率为23.87％，属混合铜矿。根据矿石性质，分别拟定并开展了“氧硫混选”“氧硫分选”和“浮选—尾矿酸浸”3种选铜工艺的探索对比试验，试验结果表明，“浮选—尾矿酸浸”是适宜的选铜流程。试验表明：1）在较佳的分选条件下，原矿经“浮选—尾矿酸浸”联合流程选别后，可获得铜精矿产率4.41％、Cu 品味20.52％、回收率73.05％；浸液铜品位880.00 mg／L、浸出率14.16％，铜总回收率87.21％的技术经济指标。铜得到了回收利用。