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| Study on Acid Leaching Technology of Waste NCM Battery Anode Materials and Al-Ni-Co Magnetic Scraps Mixtures |
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Received:December 30, 2019
Revised:January 03, 2020
Accepted:January 06, 2020
Published Online:May 26, 2020
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| DOI：doi：10.3969/j.issn.1007-7545.2020.06.004 |
| KeyWord:waste NCM battery anode materials; waste Al-Ni-Co magnetic scraps; valuable element; sulfuric acid leaching; process condition |
| Author | Institution |
| XIONG Yi-jun |
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 |
| ZHANG Jun-nan |
赣州逸豪优美科实业有限公司 |
| WANG Yuan-hua |
赣州逸豪优美科实业有限公司 |
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| Abstract: |
| Valuable elements (Co, Cu, Ni, Li and Mn) were acid leached by mixing waste NCM battery anode materials and Al-Ni-Co magnetic scrap materials. Effects of mass ratio of two waste materials, reaction temperature, reaction time, sulfuric acid concentration, and L/S on leaching efficiency were investigated. Leaching rate of Co, Cu, Ni, Li, Mn is all above 99.5% under the optimum process including mass ratio of two waste materials of 2.33︰1, sulfuric acid concentration of 1.1 mol/L, L/S of 6︰1, reaction temperature of 75 ℃, and reaction time of 4 h. Fe3+/Fe2+ ion forms a redox circulation reaction in acidic condition to ensure a continuous leaching reaction. This process is efficient, environment friendly and can provide an innovative process for integrated recovery of waste NCM battery anode materials and Al-Ni-Co magnetic scraps. |
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