Na2SO4–NaCl binary eutectic salt roasting to enhance extraction of lithium from pyrometallurgical slag of spent lithium-ion batteries

doi:10.1016/j.cjche.2021.09.008

中国化学工程学报 ›› 2022, Vol. 41 ›› Issue (1): 294-300.DOI: 10.1016/j.cjche.2021.09.008

• Separation Science and Engineering • 上一篇下一篇

Na₂SO₄–NaCl binary eutectic salt roasting to enhance extraction of lithium from pyrometallurgical slag of spent lithium-ion batteries

Hui Dang¹, Zhidong Chang¹, Xue Wu², Sihang Ma¹, Yifei Zhan¹, Na Li¹, Wenbo Liu¹, Wenjun Li¹, Hualei Zhou¹, Changyan Sun¹

1 Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2 Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China

收稿日期:2021-06-02 修回日期:2021-09-08 出版日期:2022-01-28 发布日期:2022-02-25
通讯作者: Zhidong Chang,E-mail address:zdchang@ustb.edu.cn
基金资助:
This work was supported by the National Natural Science Foundation of China (21276022).

Na₂SO₄–NaCl binary eutectic salt roasting to enhance extraction of lithium from pyrometallurgical slag of spent lithium-ion batteries

Hui Dang¹, Zhidong Chang¹, Xue Wu², Sihang Ma¹, Yifei Zhan¹, Na Li¹, Wenbo Liu¹, Wenjun Li¹, Hualei Zhou¹, Changyan Sun¹

1 Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2 Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China

Received:2021-06-02 Revised:2021-09-08 Online:2022-01-28 Published:2022-02-25
Contact: Zhidong Chang,E-mail address:zdchang@ustb.edu.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (21276022).

摘要/Abstract

摘要： Effectively extracting lithium at a relatively low temperature from the slag produced by the pyrometallurgical treatment of spent lithium-ion batteries remains a great challenge, which limits the acquirement of lithium. Herein, we proposed a eutectic system to roast slag at a lower temperature based on sodium sulfate–sodium chloride (Na₂SO₄–NaCl) binary eutectic salts. The optimal roasting conditions are as follows: the slag was roasted at 750 ℃ with a (SO₄^2–+Cl^–)/Li⁺ molar ratio of 5:1 for 120 min. Followed by aqueous leaching 5 min at room temperature with a water/roasted samples mass ratio of 30:1, it can get 97.07% lithium extraction efficiency.

关键词: Spent lithium–ion battery, Lithium recovery, Silicate structure, Binary eutectic salt roasting

Abstract: Effectively extracting lithium at a relatively low temperature from the slag produced by the pyrometallurgical treatment of spent lithium-ion batteries remains a great challenge, which limits the acquirement of lithium. Herein, we proposed a eutectic system to roast slag at a lower temperature based on sodium sulfate–sodium chloride (Na₂SO₄–NaCl) binary eutectic salts. The optimal roasting conditions are as follows: the slag was roasted at 750 ℃ with a (SO₄^2–+Cl^–)/Li⁺ molar ratio of 5:1 for 120 min. Followed by aqueous leaching 5 min at room temperature with a water/roasted samples mass ratio of 30:1, it can get 97.07% lithium extraction efficiency.

Key words: Spent lithium–ion battery, Lithium recovery, Silicate structure, Binary eutectic salt roasting

Hui Dang, Zhidong Chang, Xue Wu, Sihang Ma, Yifei Zhan, Na Li, Wenbo Liu, Wenjun Li, Hualei Zhou, Changyan Sun. Na₂SO₄–NaCl binary eutectic salt roasting to enhance extraction of lithium from pyrometallurgical slag of spent lithium-ion batteries[J]. 中国化学工程学报, 2022, 41(1): 294-300.

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Na₂SO₄–NaCl binary eutectic salt roasting to enhance extraction of lithium from pyrometallurgical slag of spent lithium-ion batteries

Na₂SO₄–NaCl binary eutectic salt roasting to enhance extraction of lithium from pyrometallurgical slag of spent lithium-ion batteries

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