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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