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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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。
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来源期刊
Hydrometallurgy
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.
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