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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium REWAS 2022: Poster Session
Presentation Title Recovery of Rare Earth Elements from Nd-Fe-B Magnet through Selective Chlorination Using Zinc Chloride
Author(s) Kyung-Hwan Lim, Chan Uk Choi, Gyeonghye Moon, Tae-Hyuk Lee, Jungshin Kang
On-Site Speaker (Planned) Jungshin Kang
Abstract Scope A novel selective chlorination process using zinc chloride was investigated for the selective recovery of rare earth elements from a Nd-Fe-B magnet. An Nd-Fe-B magnet powder and zinc chloride mixture in an alumina crucible was positioned in a gas-tight quartz tube. This quartz tube was placed in an electric furnace preheated to 1000 K for 1.5 – 5 h for the reactions. After the experiments, a mixture of metallic iron and neodymium chloride was produced owing to the selective chlorination of rare earth elements in the magnet powder. In addition, the chlorination efficiencies of neodymium, dysprosium, and praseodymium were 96.5 %, 57.2 %, and 97.6 %, respectively, under the certain conditions. Therefore, it was demonstrated that the novel selective chlorination using zinc chloride developed in this study is feasible for the efficient recycling of Nd-Fe-B magnets.
Proceedings Inclusion? Planned:
Keywords Extraction and Processing, Recycling and Secondary Recovery, Pyrometallurgy


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