Extraction of lithium and phosphorus from amblygonite using calcium sulfate roasting and water leaching

IF 4.8 2区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Hydrometallurgy Pub Date : 2024-02-03 DOI:10.1016/j.hydromet.2024.106282

Qingfeng Zhou, Xiangdong Ma, Xunhui Xiong

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引用次数: 0

Abstract

This work proposes the roasting of amblygonite with calcium sulfate followed by water leaching to extract lithium and phosphorus. Various roasting parameters including roasting temperature, the mass ratio CaSO₄/ore, roasting time as well as leaching parameters, such as the liquid/solid ratio, temperature and time, have been carefully investigated. The lithium extraction efficiency can be as high as 99.8% with a mass ratio of CaSO₄/ore of 0.85 after roasting at 775 °C for 1 h and water leaching at a liquid/solid ratio of 3 mL/g at 100 °C for 2 h. The XRD analysis demonstrates that the fluoride in the amblygonite can be converted into Ca₅(PO₄)₃F and CaF₂. Lithium in the leach liquor can be recovered as Li₂CO₃. Meanwhile, the phosphorus in the water leach residue can be recovered as FePO₄ with a high recovery of 96.6% after acid dissolution and precipitation, which can be further treated to produce LiFePO₄.

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利用硫酸钙焙烧和水浸法从伏芒硝中提取锂和磷

本研究提出用硫酸钙焙烧伏芒硝，然后进行水浸出，以提取锂和磷。对焙烧温度、CaSO4/ore 质量比、焙烧时间等焙烧参数以及液固比、温度和时间等浸出参数进行了仔细研究。当 CaSO4/ore 的质量比为 0.85 时，在 775 °C 下焙烧 1 小时，并在 100 °C 下以 3 mL/g 的液固比进行水浸出 2 小时后，锂的提取效率高达 99.8%。XRD 分析表明，伏芒硝中的氟化物可转化为 Ca5(PO4)3F 和 CaF2。浸出液中的锂可以以 Li2CO3 的形式回收。同时，水浸出残渣中的磷经过酸溶解和沉淀后可被回收为 FePO4，回收率高达 96.6%，可进一步处理生成 LiFePO4。

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

Hydrometallurgy 工程技术-冶金工程

CiteScore

9.50

自引率

6.40%

发文量

144

审稿时长

3.4 months

期刊介绍： Hydrometallurgy aims to compile studies on novel processes, process design, chemistry, modelling, control, economics and interfaces between unit operations, and to provide a forum for discussions on case histories and operational difficulties. Topics covered include: leaching of metal values by chemical reagents or bacterial action at ambient or elevated pressures and temperatures; separation of solids from leach liquors; removal of impurities and recovery of metal values by precipitation, ion exchange, solvent extraction, gaseous reduction, cementation, electro-winning and electro-refining; pre-treatment of ores by roasting or chemical treatments such as halogenation or reduction; recycling of reagents and treatment of effluents.