Na<sub>2</sub>SO<sub>4</sub>–NaCl binary eutectic salt roasting to enhance extraction of lithium from pyrometallurgical slag of spent lithium-ion batteries

Hui Dang; Zhidong Chang; Xue Wu; Sihang Ma; Yifei Zhan; Na Li; Wenbo Liu; Wenjun Li; Hualei Zhou; Changyan Sun

doi:10.1016/j.cjche.2021.09.008

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

Separation Science and Engineering | Updated：2026-01-06

- Na₂SO₄–NaCl binary eutectic salt roasting to enhance extraction of lithium from pyrometallurgical slag of spent lithium-ion batteries
- Chinese Journal of Chemical Engineering Vol. 41, Issue 1, Pages: 294-300(2022)
- Affiliations：
  
  1. Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing,Beijing,China,100083
  2. Institute of Biophysics, Chinese Academy of Sciences,Beijing,China,100101
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2021.09.008
  CLC：
- Published：2022
- Accepted：
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DOI：

SO DOI： 10.1016/j.cjche.2021.09.008.

摘要

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 (Na

–NaCl) binary eutectic salts. The optimal roasting conditions are as follows: the slag was roasted at 750 ℃ with a (SO

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.

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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

摘要

Abstract

关键词

Keywords

references

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