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

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-74μm 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。

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-74μm 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.