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| The research situation and advances in pyrometallurgy recovery of NdFeB waste |
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Received:July 02, 2021
Revised:September 02, 2021
Accepted:September 14, 2021
Published Online:April 27, 2022
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| DOI： |
| KeyWord:waste NbFeB; Rare earth; Recycling; New method |
| Author | Institution |
| Li Jianru |
Kunming University of Science and Technology |
| Xu Cunying |
Kunming University of Science and Technology |
| Lu jingling |
Kunming University of Science and Technology |
| Wang Shuxian |
Kunming University of Science and Technology |
| Fu Feie |
Kunming University of Science and Technology |
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| Abstract: |
| NdFeB magnets are widely used in electric machines, electronic appliances, medical instruments, aerospace and other high-tech fields, and its demand is increasing year by year, which make the supply of rare earths increasingly tight. At the same time, more and more waste NdFeB is produced. The recovery of waste NdFeB is helpful to solve the problems of rare earth shortage, environmental pollution and resource waste. Therefore, it is very important to do a thoroughly study on the recycling waste NdFeB. Depending on the form of the starting material (sludge or scrap), there are different routes that can be used to recover rare earth from waste NdFeB, ranging from hydrometallurgical, electrochemical to pyrometallurgical. In order to provide theoretical guidance in the research of effective recovery of waste NdFeB, this paper presents a systematic review of previous studies on the high-temperature (pyrometallurgical) recovery of rare earths from magnets, and the characteristics of these methods are summarized as well. |
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