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| Pre-removal of Impurities Combined with Multi-stage Roasting to Strengthen Selective Extraction of Lithium from Spent Lithium Batteries |
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Received:May 30, 2023
Revised:June 07, 2023
Accepted:June 09, 2023
Published Online:August 11, 2023
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| DOI：doi：10.3969/j.issn.1007-7545.2023.09.014 |
| KeyWord:spent lithium-ion batteries; reduction roasting; pre- removal of impurities; multi-stage roasting |
| Author | Institution |
| DING Lixin |
中国矿业大学 |
| LIU Zimeng |
中国矿业大学 |
| JIANG Tao |
中国矿业大学 |
| YUAN Xue |
中国矿业大学 |
| HE Yaqun |
中国矿业大学 |
| ZHANG Guangwen |
中国矿业大学 |
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| Abstract: |
| Through the combination of pre-removal of impurities and multi-stage roasting, the efficient selective lithium extraction from spent ternary lithium-ion batteries can be realized. The optimum process conditions for carbon thermal reduction were determined by single factor experiments: roasting temperature of 700 ℃ and roasting time of 120 minutes. Under the optimal conditions of reduction roasting, the recovery rate of lithium rises from 85.22% to 92.70% after the removal of organic matter and aluminum foil by pyrolysis, hydraulic stirring, screening, and alkali leaching. Furthermore, the lithium recovery rate can be up to 94.16% by two-stage roasting combined with water leaching. |
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