Research on the Hierarchical Separation of Rare Earths and Lithium from Rare Earth Molten Salt Slag
Lithium is an important non-renewable resource, and the study of the tiered separation of rare earths and lithium from rare earth molten salt slag is an important approach to solving the current global resource shortage. This article adopts a sulfuric acid leaching process and a lithium-containing s...
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MDPI AG
2024-11-01
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| author | Hao Tang Chunfa Liao Fupeng Liu Jiahui Mao Zecheng Zhou Yijian Zheng |
| author_facet | Hao Tang Chunfa Liao Fupeng Liu Jiahui Mao Zecheng Zhou Yijian Zheng |
| author_sort | Hao Tang |
| collection | DOAJ |
| description | Lithium is an important non-renewable resource, and the study of the tiered separation of rare earths and lithium from rare earth molten salt slag is an important approach to solving the current global resource shortage. This article adopts a sulfuric acid leaching process and a lithium-containing solution iron lithium extraction separation process to recover lithium from rare earth molten salt slag. The method systematically investigates the impact of sulfuric acid concentration, liquid-to-solid ratio, leaching temperature, leaching time, pH, P507 concentration, phase ratio, extraction temperature, and extraction time on the lithium extraction effect and iron lithium separation effect in rare earth molten salt slag. The results show that under the conditions of a sulfuric acid concentration of 0.9 mol/L, a liquid-to-solid ratio of 8:1 mL/g, a leaching temperature of 70 °C, a leaching time of 90 min, a pH of 0.9, a P507 concentration of 50%, a phase ratio of 5:3, an extraction temperature of 30 °C, and an extraction time of 20 min, the lithium leaching rate reaches 97.8%, and the separation of iron and lithium is fully achieved. This method can efficiently recover the valuable element lithium from rare earth molten salt slag, which is of great significance for the subsequent preparation of lithium products and the realization of a closed-loop production of rare earth alloys by molten salt electrolysis. |
| format | Article |
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| institution | OA Journals |
| issn | 2075-4701 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
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| series | Metals |
| spelling | doaj-art-a19d7d7ba0a0428e84df9458f49a4bd02025-08-20T02:04:55ZengMDPI AGMetals2075-47012024-11-011411124710.3390/met14111247Research on the Hierarchical Separation of Rare Earths and Lithium from Rare Earth Molten Salt SlagHao Tang0Chunfa Liao1Fupeng Liu2Jiahui Mao3Zecheng Zhou4Yijian Zheng5School of Metallurgical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaSchool of Metallurgical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaSchool of Metallurgical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaSchool of Metallurgical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaSchool of Metallurgical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaSchool of Metallurgical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaLithium is an important non-renewable resource, and the study of the tiered separation of rare earths and lithium from rare earth molten salt slag is an important approach to solving the current global resource shortage. This article adopts a sulfuric acid leaching process and a lithium-containing solution iron lithium extraction separation process to recover lithium from rare earth molten salt slag. The method systematically investigates the impact of sulfuric acid concentration, liquid-to-solid ratio, leaching temperature, leaching time, pH, P507 concentration, phase ratio, extraction temperature, and extraction time on the lithium extraction effect and iron lithium separation effect in rare earth molten salt slag. The results show that under the conditions of a sulfuric acid concentration of 0.9 mol/L, a liquid-to-solid ratio of 8:1 mL/g, a leaching temperature of 70 °C, a leaching time of 90 min, a pH of 0.9, a P507 concentration of 50%, a phase ratio of 5:3, an extraction temperature of 30 °C, and an extraction time of 20 min, the lithium leaching rate reaches 97.8%, and the separation of iron and lithium is fully achieved. This method can efficiently recover the valuable element lithium from rare earth molten salt slag, which is of great significance for the subsequent preparation of lithium products and the realization of a closed-loop production of rare earth alloys by molten salt electrolysis.https://www.mdpi.com/2075-4701/14/11/1247rare earthmolten salt electrolysis slaghierarchical separationlithiumiron removal |
| spellingShingle | Hao Tang Chunfa Liao Fupeng Liu Jiahui Mao Zecheng Zhou Yijian Zheng Research on the Hierarchical Separation of Rare Earths and Lithium from Rare Earth Molten Salt Slag Metals rare earth molten salt electrolysis slag hierarchical separation lithium iron removal |
| title | Research on the Hierarchical Separation of Rare Earths and Lithium from Rare Earth Molten Salt Slag |
| title_full | Research on the Hierarchical Separation of Rare Earths and Lithium from Rare Earth Molten Salt Slag |
| title_fullStr | Research on the Hierarchical Separation of Rare Earths and Lithium from Rare Earth Molten Salt Slag |
| title_full_unstemmed | Research on the Hierarchical Separation of Rare Earths and Lithium from Rare Earth Molten Salt Slag |
| title_short | Research on the Hierarchical Separation of Rare Earths and Lithium from Rare Earth Molten Salt Slag |
| title_sort | research on the hierarchical separation of rare earths and lithium from rare earth molten salt slag |
| topic | rare earth molten salt electrolysis slag hierarchical separation lithium iron removal |
| url | https://www.mdpi.com/2075-4701/14/11/1247 |
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