REE Recovery from End-of-Life NdFeB Permanent Magnet Scrap: A Critical Review
作者： Yongxiang Yang , Allan Walton , Richard Sheridan , Konrad Güth , Roland Gauß
DOI: 10.1007/S40831-016-0090-4
关键词: Magnet 、 Solvent extraction 、 Neodymium magnet 、 Metallic materials 、 Metallurgy 、 Scrap 、 Process engineering 、 Wind power 、 Processing methods 、 Electronics 、 Environmental science
摘要: NdFeB permanent magnets have different life cycles, depending on the applications: from as short 2–3 years in consumer electronics to 20–30 wind turbines. The size of ranges less than 1 g small about kg electric vehicles (EVs) and hybrid (HEVs), can be large 1000–2000 generators modern contain 31–32 wt% rare-earth elements (REEs). Recycling REEs contained this type End-of-Life (EOL) products will play an important complementary role total supply future. However, collection recovery imposes great social technological challenges. This paper gives overview sources related their applications, followed by a summary various available technologies recover these magnets, including physical processing separation, direct alloy production, metallurgical extraction recovery. At present, no commercial operation has been identified for recycling EOL associated REE content. Most methods are still at research development stages. It is estimated that coming 10–15 years, recycled significant magnet sector, provided efficient developed implemented practice.
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