刚果(金)某地铜钴矿还原酸浸工艺研究

Study on Reducing Acid Leaching Process of Copper-Cobalt Ore from a Certain Area in Congo (DRC)

摘要: 针对刚果(金)某铜钴矿，采用还原酸浸的方法浸出其中的铜、钴。考察磨矿细度、矿浆浓度、浸出终点pH值、焦亚硫酸钠用量、浸出温度、浸出时间对铜、钴浸出率的影响，结果显示：在矿细度−74 μm占66.75%、矿浆浓度30%、浸出pH值为1.8、焦亚硫酸钠用量10 kg/t矿、浸出温度20℃、浸出时间5 h的较优条件下，铜、钴浸出率分别为93.77%、83.74%，铜、钴提取效果较优。

Abstract: For a copper-cobalt ore in the Democratic Republic of the Congo, a reducing acid leaching method was used to extract copper and cobalt from it. The impact of grinding fineness, pulp concentration, leaching pH value, reducing agent sodium pyrosulfite, leaching temperature, and leaching time on the leaching rate of copper and cobalt was investigated. Under the conditions of ore fineness of −74 μ m accounting for 66.75%, pulp concentration of 30%, leaching pH of 1.8, sodium pyrosulfite amount of 10 kg/t ore, leaching temperature of 20˚C, and leaching time of 5 hours, the leaching rates of copper and cobalt can reach 93.77% and 83.74% respectively, and the extraction effect of copper and cobalt is excellent.