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| Study on Two Stage Leaching Process of Crude Nickel Cobalt Hydroxide (MHP) |
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Received:April 03, 2023
Revised:May 17, 2023
Accepted:May 18, 2023
Published Online:July 10, 2023
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| DOI：doi：10.3969/j.issn.1007-7545.2023.08.005 |
| KeyWord:crude nickel and cobalt hydroxide; nickel; cobalt; leaching rate; expansion test |
| Author | Institution |
| ZHANG Xue-Dong |
矿冶科技集团有限公司 |
| WANG Hai-bei |
矿冶科技集团有限公司 |
| LIU San-ping |
矿冶科技集团有限公司 |
| ZHENG Chao-zhen |
郑朝振 |
| QIN Shu-chen |
秦树辰 |
| DENG Chao-qun |
矿冶科技集团有限公司 |
| ZHOU Qi-fan |
矿冶科技集团有限公司 |
| WANG Yu-fang |
矿冶科技集团有限公司 |
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| Abstract: |
| In order to extract nickel and cobalt from crude nickel cobalt hydroxide more efficiently, two-stage leaching process was used to leach nickel and cobalt from Ruimu crude nickel cobalt hydroxide (MHP). The effects of pH value, temperature and time of first-stage leaching, and sulfuric acid dosage and time in second-stage leaching on the leaching effect of nickel, cobalt and manganese were investigated. The results show that under the conditions of the first stage leaching temperature of 70 ℃, pH value of 2.0~2.5, leaching time of 1.5 h, and sulfuric acid addition of second stage is 50%~70% of the first stage, the nickel and cobalt leaching effect is the best, which can reach 100% and 98.99% respectively, manganese leaching rate can be inhibited at 36.82%, and the slag rate is 5.32%. The cobalt and manganese content in slag is 0.71% and 55.55%, respectively. The total acid consumption is about 760 kg/t. According to the conditions of the small-scale experiment, the continuous expansion test results of 300 kg/d can achieve the leaching effect of the small-scale test. |
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