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| Leaching of Cobalt from Cobalt Intermediate with Ferrous Ion and Oxygen |
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Received:September 15, 2021
Revised:September 22, 2021
Accepted:September 27, 2021
Published Online:December 17, 2021
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| DOI：doi：10.3969/j.issn.1007-7545.2022.01.003 |
| KeyWord:cobalt intermediate; ferrous; oxygenation; acid free; leaching |
| Author | Institution |
| XIONG Yi-jun |
赣州逸豪优美科实业有限公司 |
| CHEN Bing |
赣州逸豪优美科实业有限公司 |
| XIE Xin-xu |
赣州逸豪优美科实业有限公司 |
| LUO Xuan |
赣州逸豪优美科实业有限公司 |
| XU Yong-hua |
赣州逸豪优美科实业有限公司 |
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| Abstract: |
| Cobalt was leached from cobalt intermediate under condition of blast oxidation with ferrous sulfate. Fe2+ reduces Co3+ to Co2+, and Fe2+ reacts with oxygen to form FeOOH, meanwhile producing acid, which can further leach cobalt intermediate. Co leaching rate is 99.7% under the optimum conditions including temperature of 80 ℃, Fe/Co molar ratio of 1.05, L/S of 8, leaching time of 3h, air blowing volume rate of 8 L/min, and potential of 285 mV. This method is eco-friendly without using of acid, alkali, or reductant. It provides a new solution for leaching of cobalt intermediate and removing iron from ferrous leaching solution. |
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