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| Two Stage Countercurrent Reduction Leaching of Complex Low Grade Oxidized Copper and Cobalt Ores |
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Received:November 10, 2015
Revised:November 12, 2015
Accepted:November 16, 2015
Published Online:April 18, 2016
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| DOI：doi：10.3969/j.issn.1007-7545.2016.05.001 |
| KeyWord:oxidized copper and cobalt ores; SO2; reduction leaching; two stage countercurrent leaching |
| Author | Institution |
| Li Qiang |
北京矿冶研究总院 |
| Yang Bo |
北京矿冶研究总院 |
| Ruan Shufeng |
北京矿冶研究总院 |
| Yin Fei |
北京矿冶研究总院 |
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| Abstract: |
| Direct reduction leaching of complex low grade oxidized copper and cobalt ores was studied. The results show that leaching rates of copper, nickel and zinc are 74.23%, 47.82%, and 59.31% respectively under the optimum conditions including ratio of liquid to solid of 2︰1, leaching temperature of 80 ℃, sulfuric acid consumption of tonnage ore of 117.2 kg, leaching time of 2 h, and ending potential of 340~350 mV adjusted by inletting SO2. The process of two stage countercurrent leaching can effectively reduce consumption of reducing agent, realize comprehensive utilization of free acid in leaching solution, and reduce alkali consumption for neutralization. |
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