刚果(金)某铜钴矿浸出新工艺

    A New Process of Leaching Copper and Cobalt from Copper Cobalt Oxide Ore in DR Congo

    • 摘要: 这是一篇冶金工程领域的文章。刚果(金)某铜钴矿为氧化矿,铜钴含量分别为Cu 3.43%和Co 0.42%。本文采用浸出液五级循环浸出工艺浸出铜和钴,在硫酸用量为矿石质量的7.4%、亚硫酸钠用量为理论量的1.68倍、磨矿粒度-74 μm 75%、浸出温度45 ℃、浸出液固体积质量比2/1~3/1、单级浸出时间4 h的实验条件下,铜浸出率96.85%、钴浸出率95.67%。该工艺在确保铜钴浸出率的情况下,比一级浸出降低硫酸用量6 kg/t、浸出过程总溶液量减少约1/4,降低了酸耗、减少了后续钴沉淀和铜萃取处理液量。

       

      Abstract: This is an article in the field of metallurgical engineering. A copper cobalt ore Congo is an oxide ore with Cu 3.43% and Co 0.42% respectively. In this paper, the five stage cycle leaching process of leaching solution was used for the copper and cobalt leaching. The optimum conditions were as follows: the amount of sulfuric acid was 7.4% of the ore mass, the amount of sodium sulfite was 1.68 times of the theoretical amount, the grinding particle size of -74 μm accounts for 75%, leaching temperature was 45 ℃, the single-stage leaching time was 4 hours, and the liquid-solid volume mass ratio was between 2/1 and 3/1, the results showed that the leaching rate of copper and cobalt were 96.85% and 95.67% respectively. According to this leaching process, the amount of sulfuric acid was reduced by 6 kg/t compared with the primary leaching, and the total solution amount in the leaching process was reduced by about 1/4, which made the amount of subsequent cobalt precipitation and copper extraction solution was reduced.

       

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