Hydrometallurgical Recovery of Rare Earth Elements from NdFeB Permanent Magnet Scrap: A Review
NdFeB permanent magnet scrap is regarded as an important secondary resource which contains rare earth elements (REEs) such as Nd, Pr and Dy. Recovering these valuable REEs from the NdFeB permanent magnet scrap not only increases economic potential, but it also helps to reduce problems relating to di...
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| Format: | Article |
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MDPI AG
2020-06-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/10/6/841 |
| _version_ | 1797564218372784128 |
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| author | Yuanbo Zhang Foquan Gu Zijian Su Shuo Liu Corby Anderson Tao Jiang |
| author_facet | Yuanbo Zhang Foquan Gu Zijian Su Shuo Liu Corby Anderson Tao Jiang |
| author_sort | Yuanbo Zhang |
| collection | DOAJ |
| description | NdFeB permanent magnet scrap is regarded as an important secondary resource which contains rare earth elements (REEs) such as Nd, Pr and Dy. Recovering these valuable REEs from the NdFeB permanent magnet scrap not only increases economic potential, but it also helps to reduce problems relating to disposal and the environment. Hydrometallurgical routes are considered to be the primary choice for recovering the REEs because of higher REEs recovery and its application to all types of magnet compositions. In this paper, the authors firstly reviewed the chemical and physical properties of NdFeB permanent magnet scrap, and then carried out an in-depth discussion on a variety of hydrometallurgical processes for recovering REEs from the NdFeB permanent magnet scrap. The methods mainly included selective leaching or complete leaching processes followed by precipitation, solvent extraction or ionic liquids extraction processes. Particular attention is devoted to the specific technical challenge that emerges in the hydrometallurgical recovery of REEs from NdFeB permanent magnet scrap and to the corresponding potential measures for improving REEs recovery by promoting the processing efficiency. This summarized review will be useful for researchers who are developing processes for recovering REEs from NdFeB permanent magnet scrap. |
| first_indexed | 2024-03-10T18:54:17Z |
| format | Article |
| id | doaj.art-67187f2f89d2413a82201987f2928ee6 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T18:54:17Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-67187f2f89d2413a82201987f2928ee62023-11-20T04:52:32ZengMDPI AGMetals2075-47012020-06-0110684110.3390/met10060841Hydrometallurgical Recovery of Rare Earth Elements from NdFeB Permanent Magnet Scrap: A ReviewYuanbo Zhang0Foquan Gu1Zijian Su2Shuo Liu3Corby Anderson4Tao Jiang5School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaDepartment of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, CO 80401, USASchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaNdFeB permanent magnet scrap is regarded as an important secondary resource which contains rare earth elements (REEs) such as Nd, Pr and Dy. Recovering these valuable REEs from the NdFeB permanent magnet scrap not only increases economic potential, but it also helps to reduce problems relating to disposal and the environment. Hydrometallurgical routes are considered to be the primary choice for recovering the REEs because of higher REEs recovery and its application to all types of magnet compositions. In this paper, the authors firstly reviewed the chemical and physical properties of NdFeB permanent magnet scrap, and then carried out an in-depth discussion on a variety of hydrometallurgical processes for recovering REEs from the NdFeB permanent magnet scrap. The methods mainly included selective leaching or complete leaching processes followed by precipitation, solvent extraction or ionic liquids extraction processes. Particular attention is devoted to the specific technical challenge that emerges in the hydrometallurgical recovery of REEs from NdFeB permanent magnet scrap and to the corresponding potential measures for improving REEs recovery by promoting the processing efficiency. This summarized review will be useful for researchers who are developing processes for recovering REEs from NdFeB permanent magnet scrap.https://www.mdpi.com/2075-4701/10/6/841rare earth elementsNdFeB permanent magnethydrometallurgicalrecovery |
| spellingShingle | Yuanbo Zhang Foquan Gu Zijian Su Shuo Liu Corby Anderson Tao Jiang Hydrometallurgical Recovery of Rare Earth Elements from NdFeB Permanent Magnet Scrap: A Review Metals rare earth elements NdFeB permanent magnet hydrometallurgical recovery |
| title | Hydrometallurgical Recovery of Rare Earth Elements from NdFeB Permanent Magnet Scrap: A Review |
| title_full | Hydrometallurgical Recovery of Rare Earth Elements from NdFeB Permanent Magnet Scrap: A Review |
| title_fullStr | Hydrometallurgical Recovery of Rare Earth Elements from NdFeB Permanent Magnet Scrap: A Review |
| title_full_unstemmed | Hydrometallurgical Recovery of Rare Earth Elements from NdFeB Permanent Magnet Scrap: A Review |
| title_short | Hydrometallurgical Recovery of Rare Earth Elements from NdFeB Permanent Magnet Scrap: A Review |
| title_sort | hydrometallurgical recovery of rare earth elements from ndfeb permanent magnet scrap a review |
| topic | rare earth elements NdFeB permanent magnet hydrometallurgical recovery |
| url | https://www.mdpi.com/2075-4701/10/6/841 |
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