The use of thermal hydrogen decrepitation to recycle Nd-Fe-B magnets from electronic waste
Rare earth magnets based upon neodymium-iron-boron (NdFeB) are employed in many high tech applications, including hard disk drives (HDDs). The key elements in manufacturing NdFeB magnets are rare earth elements (REEs) such as neodymium. This element has been subject to significant supply shortfalls...
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| Format: | Article |
| Language: | English |
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University of Belgrade, Technical Faculty, Bor
2020-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2020/1450-53392000032P.pdf |
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| author | Piotrowicz A. Pietrzyk S. Noga P. Myćka Ł. |
| author_facet | Piotrowicz A. Pietrzyk S. Noga P. Myćka Ł. |
| author_sort | Piotrowicz A. |
| collection | DOAJ |
| description | Rare earth magnets based upon neodymium-iron-boron (NdFeB) are employed in many high tech applications, including hard disk drives (HDDs). The key elements in manufacturing NdFeB magnets are rare earth elements (REEs) such as neodymium. This element has been subject to significant supply shortfalls in the recent past. Recycling of NdFeB magnets contained within waste of electrical and electronic equipment (WEEE) could provide a secure and alternative supply of these materials. Various recycling approaches for the recovery of sintered NdFeB magnets have been widely explored. Hydrogen decrepitation (HD) can be used as a direct reuse approach and effective method of recycling process to turn solid sintered magnets into a demagnetised powder for further processing. In this work, sintered Nd-Fe-B magnets were processed without prior removal of the metallic protective layer using the thermal HD process as an alternative recycling method. The gas sorption analyzer was used to determine the quantity of the hydrogen absorbed by a samples of magnets, under controlled pressure (1, 2, 3, and 4 bar) and temperature (room, 100, 300, and 400°C) conditions, using Sieverts’ volumetric method. The composition and morphology of the starting and the extracted/disintegrated materials were examined by ICP, XRD, and SEM-EDS analysis. |
| format | Article |
| id | doaj-art-7917f1993e9648e9a93be165348ecc31 |
| institution | Kabale University |
| issn | 1450-5339 2217-7175 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-7917f1993e9648e9a93be165348ecc312025-02-02T01:10:20ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392217-71752020-01-0156341542410.2298/JMMB200207032P1450-53392000032PThe use of thermal hydrogen decrepitation to recycle Nd-Fe-B magnets from electronic wastePiotrowicz A.0Pietrzyk S.1Noga P.2Myćka Ł.3AGH University of Science and Technology, Faculty of Non-Ferrous Metals, Cracow, PolandAGH University of Science and Technology, Faculty of Non-Ferrous Metals, Cracow, PolandAGH University of Science and Technology, Faculty of Non-Ferrous Metals, Cracow, PolandŁukasiewicz Research Network, Institute of Non-Ferrous Metals, Gliwice, PolandRare earth magnets based upon neodymium-iron-boron (NdFeB) are employed in many high tech applications, including hard disk drives (HDDs). The key elements in manufacturing NdFeB magnets are rare earth elements (REEs) such as neodymium. This element has been subject to significant supply shortfalls in the recent past. Recycling of NdFeB magnets contained within waste of electrical and electronic equipment (WEEE) could provide a secure and alternative supply of these materials. Various recycling approaches for the recovery of sintered NdFeB magnets have been widely explored. Hydrogen decrepitation (HD) can be used as a direct reuse approach and effective method of recycling process to turn solid sintered magnets into a demagnetised powder for further processing. In this work, sintered Nd-Fe-B magnets were processed without prior removal of the metallic protective layer using the thermal HD process as an alternative recycling method. The gas sorption analyzer was used to determine the quantity of the hydrogen absorbed by a samples of magnets, under controlled pressure (1, 2, 3, and 4 bar) and temperature (room, 100, 300, and 400°C) conditions, using Sieverts’ volumetric method. The composition and morphology of the starting and the extracted/disintegrated materials were examined by ICP, XRD, and SEM-EDS analysis.http://www.doiserbia.nb.rs/img/doi/1450-5339/2020/1450-53392000032P.pdfneodymium magnetsndfeb recyclinghydrogen decrepitation |
| spellingShingle | Piotrowicz A. Pietrzyk S. Noga P. Myćka Ł. The use of thermal hydrogen decrepitation to recycle Nd-Fe-B magnets from electronic waste Journal of Mining and Metallurgy. Section B: Metallurgy neodymium magnets ndfeb recycling hydrogen decrepitation |
| title | The use of thermal hydrogen decrepitation to recycle Nd-Fe-B magnets from electronic waste |
| title_full | The use of thermal hydrogen decrepitation to recycle Nd-Fe-B magnets from electronic waste |
| title_fullStr | The use of thermal hydrogen decrepitation to recycle Nd-Fe-B magnets from electronic waste |
| title_full_unstemmed | The use of thermal hydrogen decrepitation to recycle Nd-Fe-B magnets from electronic waste |
| title_short | The use of thermal hydrogen decrepitation to recycle Nd-Fe-B magnets from electronic waste |
| title_sort | use of thermal hydrogen decrepitation to recycle nd fe b magnets from electronic waste |
| topic | neodymium magnets ndfeb recycling hydrogen decrepitation |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2020/1450-53392000032P.pdf |
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