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| Recovery of Nickel and Cobalt from Ni-Co-Bearing Purification Slag by Acid-Washing and Reduction Leaching |
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Received:December 31, 2016
Revised:January 12, 2017
Accepted:January 12, 2017
Published Online:April 20, 2017
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| DOI：doi：10.3969/j.issn.1007-7545.2017.05.001 |
| KeyWord:purification residues; reduction leaching; nickel; cobalt |
| Author | Institution |
| LIU Wen-ming |
中南大学 化学化工学院 长沙 |
| TANG Xin-cun |
中南大学 化学化工学院 长沙 |
| WANG Yang |
中南大学 化学化工学院 长沙 |
| JIN Yuan |
中南大学 化学化工学院 长沙 |
| WANG Tao |
中南大学 化学化工学院 长沙 |
| ZHOU Le |
中南大学 化学化工学院 长沙 |
| WU Yi-na |
中南大学 化学化工学院 长沙 |
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| Abstract: |
| Nickel and cobalt were recovered from Ni-Co-bearing purification residues by acid-washing and reduction leaching. The effects of end point pH value during acid leaching and sulfuric acid content, leaching temperature and time, end point pH value, L/S, and hydrogen peroxide concentration during reduction leaching on leaching rate of Ni and Co were discussed. The results show that nickel leaching rate is 78.1% and cobalt leaching rate is very low under the condition of pH value of 2.5 during acid-washing. Nickel leaching rate is 98.3% and cobalt leaching rate is 97.5% during reduction leaching under the optimum conditions including L/S of 10︰1, sulfuric acid concentration of 1.5 mol/L, leaching time of 3 h, leaching temperature of 60 ℃, and dosage of hydrogen peroxide of 1.0 mL/g. |
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