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| Study on Medium Temperature Oxygen Pressure Leaching of Complex Sulfide Copper Nickel Slag and Synchronous Iron Precipitation |
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Received:June 30, 2024
Revised:July 24, 2024
Accepted:July 29, 2024
Published Online:September 11, 2024
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| DOI：doi：10.3969/j.issn.1007-7545.2024.10.018 |
| KeyWord:copper nickel sulfide slag; medium temperature oxygen pressure leaching; iron precipitation |
| Author | Institution |
| QIN Shuchen |
北京矿冶研究总院 |
| ZHOU Qifan |
矿冶科技集团有限公司 |
| ZHENG Chaozhen |
矿冶科技集团有限公司 |
| SU Lifeng |
矿冶科技集团有限公司 |
| WANG Haibei |
矿冶科技集团有限公司 |
| LIU Sanping |
矿冶科技集团有限公司 |
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| Abstract: |
| The experiments of medium temperature oxygen pressure leaching of Cu, Ni, Fe and S, and synchronous iron precipitation in complex sulfide copper nickel slag were carried out. The main elements in sulfide copper nickel slag were found out, and the effects of oxygen pressure leaching conditions on the leaching rate of Cu, Ni, Fe and S were investigated. The leaching rate of copper, nickel, iron and sulfur is 98.73%, 98.86%, 26.69%, 93.17%, respectively, the residual acid concentration in the leaching solution is 1.28 g/L, and the mass concentration of copper, nickel and iron in the leaching solution is 77.04, 18.80 and 0.67 g/L, respectively, under the optimum conditions including dosage of sulfuric acid (98%) of 20 g (i.e. 200 kg sulfuric acid per ton of copper-nickel slag), leaching temperature of 170 ℃, oxygen partial pressure of 0.4 MPa, liquid-solid ratio of 5 mL/g, and leaching time of 5 h. |
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