Selective Leaching Process of Waste Lithium Iron Phosphate Cathode Powder

Wang Wei; Liu Lin; Liu Hongzhao; Wang Hongliang; Cao Yaohua; Ma Chi

doi:10.3969/j.issn.1000-6532.2023.05.010

2023 No. 5

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Article navigation > Multipurpose Utilization of Mineral Resources > 2023 > 44(5): 53-57

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Wang Wei, Liu Lin, Liu Hongzhao, Wang Hongliang, Cao Yaohua, Ma Chi. Selective Leaching Process of Waste Lithium Iron Phosphate Cathode Powder[J]. Multipurpose Utilization of Mineral Resources, 2023, 44(5): 53-57. doi: 10.3969/j.issn.1000-6532.2023.05.010

Citation:

Wang Wei, Liu Lin, Liu Hongzhao, Wang Hongliang, Cao Yaohua, Ma Chi. Selective Leaching Process of Waste Lithium Iron Phosphate Cathode Powder[J]. Multipurpose Utilization of Mineral Resources, 2023, 44(5): 53-57. doi: 10.3969/j.issn.1000-6532.2023.05.010

Selective Leaching Process of Waste Lithium Iron Phosphate Cathode Powder

Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, China National Engineering Research Center for Utilization of Industrial Minerals, Key Laboratory for Polymetallic Ores’ Evaluation and Utilization, MNR, Comprehensive Utilization Key Laboratory of Gold Resource in Henan Province, Zhengzhou, Henan, China

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Corresponding author: Ma Chi, machi-111@163.com

Received Date: 26 September 2022

Publish Date: 25 October 2023

Abstract

Abstract

This is an essay in the field of metallurgical engineering. Using waste lithium iron phosphate battery cathode powder as raw material, a study on lithium selective leaching with Na₂S₂O₈ as oxidant and low concentration acetic acid as aleaching agent was carried out. The effects of Na₂S₂O₈ addition, acetic acid concentration, leaching temperature, leaching liquid-solid ratio and leaching time on selective leaching of lithium were investigated. At the conditions of acetic acid concentration of 0.3 mol/L, Na₂S₂O8 addition of 1.1 times the theoretical amount, L/S ratio of 10 mL /g and room temperature leaching for 2 h, the leaching rates of lithium, iron and phosphorus were 98.05%, 4.49% and 2.46% respectively.
- Metallurgical engineering /
- Lithium iron phosphate batteries /
- Lithium selective leaching /
- Sodium persulfate /
- Acetic acid

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References

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