典型文献
Extraction of lithium from the simulated pyrometallurgical slag of spent lithium-ion batteries by binary eutectic molten carbonates
文献摘要：
The effective and low-temperature extraction of lithium from the pyrometallurgical slag of spent lithium-ion batteries (LIBs) re-mains a great challenge. Herein, potassium carbonate/sodium carbonate (K2CO3/Na2CO3), which could form a eutectic molten salt system at 720℃, was used as a roasting agent to extract lithium from pyrometallurgical slag. Lithium was successfully extracted from the slag by K2CO3/Na2CO3 roasting followed by water leaching. Theoretical calculation results indicate that the lengths of Li–O bonds increase after K+/Na+ adsorption, resulting in the easy release of Li+ from the LiAlSi2O6 lattice after roasting with K2CO3/Na2CO3. Thermogravimetry–differ-ential scanning calorimetry results indicate that the eutectic phenomenon of K2CO3 and Na2CO3 could be observed at 720℃ and that the reac-tion of the slag and eutectic molten salts occurs at temperatures above 720℃. X-ray diffraction results suggest that Li+ in the slag is exchanged by K+ in K2CO3 with the concurrent formation of KAlSiO4, while Na2CO3 mainly functions as a fluxing agent. The lithium extraction effi-ciency can reach 93.87％ under the optimal conditions of a roasting temperature of 740℃, roasting time of 30 min, leaching temperature of 50℃, leaching time of 40 min, and water/roasted sample mass ratio of 10:1. This work provides a new system for extracting lithium from the pyrometallurgical slag of spent LIBs.
文献关键词：
中图分类号：
作者姓名：
Hui Dang;Zhidong Chang;Hualei Zhou;Sihang Ma;Min Li;Jialing Xiang
作者机构：
Department of Chemistry and Chemical Engineering,School of Chemistry and Biological Engineering,University of Science and Technology Beijing,Beijing100083,China
文献出处：
引用格式：
[1]Hui Dang;Zhidong Chang;Hualei Zhou;Sihang Ma;Min Li;Jialing Xiang-.Extraction of lithium from the simulated pyrometallurgical slag of spent lithium-ion batteries by binary eutectic molten carbonates)[J].矿物冶金与材料学报,2022(09):1715-1721
A类：
LiAlSi2O6,KAlSiO4
B类：
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AB值：
0.460202
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