A Fundamental Study on Recycling of Rare Earth magnet Scrap

稀土磁铁废料回收利用的基础研究

• 批准号: 03650517
• 负责人: NIINAE Masakazu
• 金额: $ 1.15万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03650517/
• 关键词: Rare earth magnet scrap; Recycling; Acid leaching; Leaching rate; Solvent extraction; 酸化焙焼

Recycling of nonferrous secondary metals is thought to be important in view of the stable supply of the metal resources. Various separation methods in mineral processing and metallurgy are generally applicable to the recycling of nonferrous secondary metals.The rare earth magnet has a good performance, and now two types of rare earth magnet are produced as industrial products. One is Sm-Co magnet and the other is Nd-Fe-B magnet. There are not rare earth resources in Japan. Therefore, the recovery of rare earth elements from rare earth magnet scrap is very important.In the present study, various metallurgical processing methods, such as oxidizing roasting, leaching and solvent extraction, were tested to develop the recovery process of nonferrous metals, such as Sm, Nd, Co and Cu, from mixed rare earth magnet scrap.As the result of the study, a treatment process of rare earth magnet scrap could be proposed.

鉴于金属资源的稳定供应，有色金属二次金属的回收利用具有重要意义。选矿和冶金中的各种分离方法普遍适用于有色金属的回收利用，稀土磁体具有良好的性能，目前已有两种稀土磁体工业化生产。一种是Sm-Co磁体，另一种是Nd-Fe-B磁体。日本没有稀土资源。因此，从稀土废料中回收稀土元素是非常重要的。本研究通过对氧化焙烧、浸出、溶剂萃取等多种冶金处理方法的试验，开发了从混合稀土废料中回收有色金属Sm、Nd、Co、Cu的工艺，为稀土废料的处理提供了一条新的工艺路线。