The Nonferrous Metals Society of China

Transactions of Nonferrous Metals Society of China >

2022 , Vol. 32 >Issue 6: 2071 - 2079

DOI: https://doi.org/10.1016/S1003-6326(22)65931-4

Mining, Minerals Processing and Metallurgical Engineering

Selective recovery of lithium from spent lithium iron phosphate batteries using oxidation pressure sulfuric acid leaching system

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  • De-you WU1,2,3,4, Dong-xing WANG1,2,3, Zhi-qiang LIU1,2,3, Shuai RAO1,2,3, Kui-fang ZHANG1,2,3
1. Institute of Resource Utilization and Rare Earth Development, Guangdong Academy of Sciences, Guangzhou 510650, China;
2. State Key Laboratory of Separation and Comprehensive Utilization of Rare Metals, Guangzhou 510650, China;
3. Guangdong Provincial Key Laboratory of Rare Earth Development and Application, Guangzhou 510650, China;
4. Guangdong Brunp Recycling Technology Co., Ltd., Foshan 528100, China

Online published: 2022-06-25

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Abstract

Oxidation pressure leaching was proposed to selectively dissolve Li from spent LiFePO4 batteries in a stoichiometric sulfuric acid solution. Using O2 as an oxidant and stoichiometric sulfuric acid as leaching agent, above 97% of Li was leached into the solution, whereas more than 99% of Fe remained in the leaching residue, enabling a relatively low cost for one-step separation of Li and Fe. And then, by adjusting the pH of leachate, above 95% of Li was recovered in the form of the Li3PO4 product through iron removal and chemical precipitation of phosphate.

Cite this article

De-youWU,Dong-xingWANG,Zhi-qiangLIU,ShuaiRAO,Kui-fangZHANG, . Selective recovery of lithium from spent lithium iron phosphate batteries using oxidation pressure sulfuric acid leaching system[J]. Transactions of Nonferrous Metals Society of China, 2022 , 32(6) : 2071 -2079 . DOI: 10.1016/S1003-6326(22)65931-4

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