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Method of separating and recovering rare earth magnets, rare earth magnet manufacturing method, an 发明授权

2023-09-05 1510 241K 0

专利信息

申请日期 2025-07-18 申请号 JP2011151031
公开(公告)号 JP5642029B2 公开(公告)日 2014-12-17
公开国别 JP 申请人省市代码 全国
申请人 Mitsubishi Electric Corporation6013
简介 PROBLEM TO BE SOLVED : To provide a separation recovery method of rare-earth magnets capable of enhancing the purity of rare-earth magnets which are separately recovered from an object to be separated, and to provide a manufacturing method of rare-earth magnets, and a manufacturing method of rotary electric machines.SOLUTION : In the separation recovery method of rare-earth magnets for separation recovering the rare-earth magnets 3 from a rotor (object to be separated) 1 including a rotor core 2 and the permanent magnets (rare-earth magnets) 3 fixed to the rotor core 2 with an adhesive 4, temperature of the rotor 1 is raised at first in a vacuum where the hydrogen partial pressure is 1 Pa or lower or in a non-oxidation gas (temperature rise step). Subsequently, temperature of the rotor 1 is maintained between 900-1000°C in a vacuum where the hydrogen partial pressure is 1-15 Pa or in a non-oxidation gas (predetermined temperature region step). Thereafter, temperature of the rotor 1 is lowered in a vacuum where the hydrogen partial pressure is 1 Pa or lower or in a non-oxidation gas (temperature lowering step).


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