发明名称 |
Remelting of rare earth magnet scrap and/or sludge, magnet-forming alloy, and sintered rare earth magnet |
摘要 |
Rare earth magnet scrap and/or sludge is remelted for reuse. Once a rare earth-free magnet-constituent metal feed is loaded in a melting furnace and heated into a melt, a rare earth-containing metal feed and the rare earth magnet scrap and/or sludge are added to the melt, a particulate flux of an alkali metal, alkaline earth metal or rare earth metal halide and having an average particle size of 1-50 mum, preferably wrapped in a metal foil, is added to the melt, and the resulting mixture is melted, from which an alloy ingot is obtained. The valuable elements in the scrap and/or sludge can be recycled. Better separation between the slag and the molten metal ensures that the ingot is obtained from the melt in a high yield.
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申请公布号 |
US6960240(B2) |
申请公布日期 |
2005.11.01 |
申请号 |
US20020191279 |
申请日期 |
2002.07.10 |
申请人 |
SHIN-ETSU CHEMICAL CO., LTD. |
发明人 |
HIROTA KOICHI;MINOWA TAKEHISA |
分类号 |
C22B7/00;C22B9/10;C22B59/00;(IPC1-7):C22B59/00;H01F1/057 |
主分类号 |
C22B7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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