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| Oxidative Pressure Leaching of Nickel Sulfide Concentrate from Zambia |
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Received:July 08, 2019
Revised:July 22, 2019
Accepted:July 23, 2019
Published Online:September 23, 2019
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| DOI：doi：10.3969/j.issn.1007-7545.2019.10.002 |
| KeyWord:nickel sulfide concentrate; nickel; copper; iron; oxidative pressure leaching |
| Author | Institution |
| XIE Keng |
北京矿冶科技集团有限公司 |
| LIU Sanping |
北京矿冶科技集团有限公司 |
| WANG Haibei |
北京矿冶科技集团有限公司 |
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| Abstract: |
| Nickel sulfide concentrate produced from copper-nickel ore in Zambia by flotation was treated by pressure hydrometallurgy. Leaching behaviors of nickel, copper and iron were studied. Effects of leaching temperature, sulfuric acid dosage, oxygen partial pressure, L/S and reaction time were investigated. Leaching rate of nickel and copper are both 99.5% above under the optimum conditions including temperature of 200℃, sulfuric acid dosage of 100 kg/t, oxygen partial pressure of 0.5 MPa, L/S=4/1, and reaction time of 3 h. Nickel extraction rises with increase of leaching temperature and oxygen partial pressure. It is feasible to leach nickel in a relatively shorter time under higher temperature and oxygen partial pressure. Leaching rate of nickel is about 99% after only 1.5 h with oxygen partial pressure rising to 0.8 MPa. |
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