Extraction of lithium from cookeite-bearing claystone by chlorination roasting: From thermodynamic calculation to experimental practice

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering Pub Date : 2025-06-27 DOI:10.1016/j.mineng.2025.109557

Ya Chen , Penghui Ping , Huoqiang Tang , Renlong Liang , Yongfeng Huang , Xilong Gu , Jiaqing Fan , Jiuqing Liu , Xichang Shi

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Abstract

With the rapid increase in lithium consumption, extracting lithium from unusual lithium resources has attracted much attention. Herein, a lithium-bearing claystone sample was characterized to determine the existence state of lithium, and the thermodynamic and practical feasibility for extracting lithium from the claystone was evaluated. The analysis indicates that cookeite is the main independent lithium-containing phase in the claystone, which has an estimated Gibbs free energy of formation: −8283.7 + 1.586T (kJ·mol⁻¹). Further thermodynamic calculation demonstrates that the chlorination roasting process using CaCl₂ as the chlorinating agent is suitable for lithium extraction from the claystone. The experiment results of chlorination roasting followed by water leaching show that under optimized conditions, the extraction efficiency of lithium can reach 84.17 %, and the obtained leaching liquor is suitable for lithium carbonate preparation. It is believed that these results will provide an avenue toward development of highly efficient processes for utilization of the unusual lithium resource.

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氯化焙烧法从含沸石粘土岩中提取锂：从热力学计算到实验实践

随着锂消费量的快速增长，从稀有锂资源中提取锂备受关注。本文对含锂粘土岩样品进行了表征，确定了锂的存在状态，并对从粘土岩中提取锂的热力学和实际可行性进行了评价。分析表明，该粘土岩中主要的独立含锂相为cookkeite，其Gibbs自由生成能为−8283.7 + 1.586T （kJ·mol−1）。进一步的热力学计算表明，以CaCl2为氯化剂的氯化焙烧工艺适合于从粘土岩中提取锂。氯化焙烧后水浸试验结果表明，在优化条件下，锂的浸出率可达84.17%，所得浸出液适合碳酸锂的制备。相信这些结果将为开发高效利用稀有锂资源的工艺提供一条途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Minerals Engineering 工程技术-工程：化工

CiteScore

8.70

自引率

18.80%

发文量

519

审稿时长

81 days

期刊介绍： The purpose of the journal is to provide for the rapid publication of topical papers featuring the latest developments in the allied fields of mineral processing and extractive metallurgy. Its wide ranging coverage of research and practical (operating) topics includes physical separation methods, such as comminution, flotation concentration and dewatering, chemical methods such as bio-, hydro-, and electro-metallurgy, analytical techniques, process control, simulation and instrumentation, and mineralogical aspects of processing. Environmental issues, particularly those pertaining to sustainable development, will also be strongly covered.