Title:
SEPARATION AND RECOVERY METHOD FOR RARE-EARTH MAGNETS, MANUFACTURING METHOD FOR RARE-EARTH MAGNETS, AND MANUFACTURING METHOD FOR ROTARY ELECTRIC MACHINE
Document Type and Number:
WIPO Patent Application WO/2013/144995
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a separation and recovery method for rare-earth magnets, a manufacturing method for rare-earth magnets, and a manufacturing method for a rotary electric machine. In this separation and recovery method for rare-earth magnets, first, a rotor (object to be separated) (1), comprising a rotor core (2) and a permanent magnet (rare-earth magnet) (3), secured to the rotor core (2) with an adhesive (4), is heated in a vacuum with a hydrogen partial pressure of 1 kPa or below or in a non-oxidizing gas (heating step). Then, the temperature of the rotor (1) is maintained at a temperature of 850-1150°C in a vacuum with a hydrogen partial pressure of 1-15 kPa or in a non-oxidizing gas (prescribed temperature range step). Then, the rotor (1) is cooled in a vacuum with a hydrogen partial pressure of 1 kPa or below or in a non-oxidizing gas (cooling step). The adhesive (4) breaks up and the permanent magnet (3) is separated and so recovered.
Inventors:
ARAKI TAKESHI (JP)
NAKANO YOSHIKAZU (JP)
NAKANO YOSHIKAZU (JP)
Application Number:
PCT/JP2012/002097
Publication Date:
October 03, 2013
Filing Date:
March 27, 2012
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
ARAKI TAKESHI (JP)
NAKANO YOSHIKAZU (JP)
ARAKI TAKESHI (JP)
NAKANO YOSHIKAZU (JP)
International Classes:
B09B3/00; H01F41/00; B09B5/00; H01F41/02
Foreign References:
| JP2001085223A | 2001-03-30 | |||
| JP2007059619A | 2007-03-08 | |||
| JPS61153201A | 1986-07-11 | |||
| JP2011216678A | 2011-10-27 | |||
| JP2001044013A | 2001-02-16 |
Attorney, Agent or Firm:
TAKAHASHI, Shogo et al. (JP)
Shogo Takahashi (JP)
Shogo Takahashi (JP)
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