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Title: Recovering heavy rare earth metals from magnet scrap

Patent ·
OSTI ID:1374568
; ;

A method of treating rare earth metal-bearing permanent magnet scrap, waste or other material in a manner to recover the heavy rare earth metal content separately from the light rare earth metal content. The heavy rare earth metal content can be recovered either as a heavy rare earth metal-enriched iron based alloy or as a heavy rare earth metal based alloy.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC02-07CH11358
Assignee:
Iowa State University Research Foundation, Inc.
Patent Number(s):
9,725,788
Application Number:
14/545,994
OSTI ID:
1374568
Resource Relation:
Patent File Date: 2015 Jul 15
Country of Publication:
United States
Language:
English

References (10)

Process for the preparation of pure alloys based on rare earths and transition metals by metallothermy patent August 1988
Scrap treatment method for rare earth transition metal alloys patent July 1992
Leaching/flotation scrap treatment method patent August 1993
Recycling of rare earth metals from rare earth-transition metal alloy scrap by liquid metal extraction patent August 1995
Remelting of rare earth magnet scrap and/or sludge, magnet-forming alloy, and sintered rare earth magnet patent-application June 2003
Method and apparatus for recovery of rare earth element patent-application February 2011
Process for extraction of rare earth elements patent-application October 2013
Method for producing metal by molten salt electrolysis and apparatus used for the production method patent-application October 2014
Method for Separating and Recovering Rare-Earth Elements patent-application December 2014
Processes for recovering rare earth elements and rare metals patent-application April 2015

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Related Subjects

36 MATERIALS SCIENCE