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Title: Recovering rare earth metals from magnet scrap

Abstract

A method is provided for treating a rare earth metal-bearing scrap material by melting an extractant selected from the group consisting of bismuth (Bi) and lead (Pb) and contacting the melted extractant and the scrap material at a temperature and time to recover at least one of the light rare earth metal content and the heavy rare earth metal content as a metallic extractant alloy, which can be subjected to vacuum distillation or sublimation to recover the rare earth metal(s). The method can be practiced to recover the light rare earth metal content and the heavy rare earth metal content concurrently in a one-step process or separately and sequentially in a two-step process.

Inventors:
;
Issue Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1568482
Patent Number(s):
10,323,299
Application Number:
14/999,802
Assignee:
Iowa State University Research Foundation, Inc. (Ames, IA)
DOE Contract Number:  
AC02-07CH11358
Resource Type:
Patent
Resource Relation:
Patent File Date: 06/28/2016
Country of Publication:
United States
Language:
English

Citation Formats

Ott, Ryan T., and McCallum, Ralph W. Recovering rare earth metals from magnet scrap. United States: N. p., 2019. Web.
Ott, Ryan T., & McCallum, Ralph W. Recovering rare earth metals from magnet scrap. United States.
Ott, Ryan T., and McCallum, Ralph W. Tue . "Recovering rare earth metals from magnet scrap". United States. https://www.osti.gov/servlets/purl/1568482.
@article{osti_1568482,
title = {Recovering rare earth metals from magnet scrap},
author = {Ott, Ryan T. and McCallum, Ralph W.},
abstractNote = {A method is provided for treating a rare earth metal-bearing scrap material by melting an extractant selected from the group consisting of bismuth (Bi) and lead (Pb) and contacting the melted extractant and the scrap material at a temperature and time to recover at least one of the light rare earth metal content and the heavy rare earth metal content as a metallic extractant alloy, which can be subjected to vacuum distillation or sublimation to recover the rare earth metal(s). The method can be practiced to recover the light rare earth metal content and the heavy rare earth metal content concurrently in a one-step process or separately and sequentially in a two-step process.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {6}
}

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Works referenced in this record:

Leaching/flotation scrap treatment method
patent, August 1993


Methods for manufacturing R-Fe-B type magnet raw material powder and R-Fe-B type magnet
patent, November 2000


Scrap treatment method for rare earth transition metal alloys
patent, July 1992


Electromigration lifetime increase of lead base alloys
patent, November 1986


Rare earth magnet and its preparation
patent, June 2015


Recovering heavy rare earth metals from magnet scrap
patent, August 2017