Berlin 2024 – scientific programme
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MA: Fachverband Magnetismus
MA 46: Poster II
MA 46.32: Poster
Thursday, March 21, 2024, 15:00–18:00, Poster C
Towards Recycling of Nd-Fe-B Permanent Magnets in a Circular Economy — •Aybike Paksoy1, Amrita Khan1, Abdullatif Durgun1, Mario Schönfeldt2, Hasan Mahmudul2, Iliya Radulov2, Imants Dirba1, and Oliver Gutfleisch1 — 1TU Darmstadt, Department of Materials and Geosciences, Functional Materials, Germany — 2Fraunhofer IWKS, Fraunhofer Research Institution for Materials Recycling and Resource Strategies, Germany
Nd-Fe-B magnets have the highest room temperature energy product (BH)max and therefore are the material of choice in various application areas critical to the clean energy transition. However, usage of critical rare earth elements creates a number of environmental, economic as well as geopolitical concerns related to China which is the main global exporter. Exhaust gas and waste water are generated in significant amounts by the chemicals needed for the rare earth mining and refining processes. If not handled properly, it will have a huge impact on the environment, causing groundwater pollution and geological deterioration. This pollution affects humans as well in the circular ecosystem, and subsequent environmental governance comes at a heavy cost. Therefore, companies and researchers have been gradually focusing on the recycling of back-end waste Nd-Fe-B permanent magnets. For an environmentally friendly product, it is necessary to reduce the criticality and increase the sustainability of rare earth permanent magnets. In this study, we investigate advanced recycling processing towards sustainable Nd-Fe-B magnets without sacrificing the performance.
Keywords: Nd-Fe-B; Permanent magnet; Recycling; Criticality; Rare earth