刚果(金)某氧化铜钴矿浸出试验研究

刚果(金)某地“铜高钴低”氧化铜钴矿含铜2.52%、含钴0.12%, 铜氧化率为94.60%, 采用酸性浸出工艺回收该矿中的铜、钴。结果表明, 在矿物-0.074 mm粒级含量占80%、液固比2∶1、一次性添加硫酸量为150 kg/t的条件下常温浸出2 h, 铜、钴浸出率分别达到93.80%和94.97%, 吨矿耗酸量为62.19 kg(折合吨铜耗酸量为2.82 t)。利用常温酸浸工艺处理该氧化铜钴矿, 可有效回收铜、钴, 可为经济开发类似矿山提供参考。

Leaching Test of a Copper-Cobalt Oxide Ore in Congo(DRC)

A kind of high-copper and low-cobalt copper-cobalt oxide ore in Congo(DRC) contains 2.52% Cu and 0.12% Co, with the copper oxidation rate at 94.60%. An acid leaching process was adopted in the test to recover the Cu and Co therein. With the feeding minerals at a sizing of 80% -0.074 mm and liquid-solid ratio of 2∶1, the leaching process at room temperature for 2 h by a single addition of sulfuric acid at 150 kg/t results in leaching rates of Cu and Co reaching 93.80% and 94.97% respectively, with the acid consumption per ton of ore at 62.19 kg (equivalent to 2.82 t sulfuric acid per ton of copper). It is shown that Cu and Co can be effectively recovered from such kind of copper-cobalt oxide ore by adopting an acid leaching process at normal temperature, which can be of a reference for the development of similar mines in an economic way.