Rare earth-transition metal scrap treatment method
Abstract
Rare earth-transition metal (e.g. iron) scrap (e.g. Nd-Fe-B scrap) is melted to reduce the levels of tramp oxygen and nitrogen impurities therein. The tramp impurities are reduced in the melt by virtue of the reaction of the tramp impurities and the rare earth to form dross on the melt. The purified melt is separated from the dross for reuse. The oxygen and nitrogen of the melt are reduced to levels acceptable for reuse of the treated alloy in the manufacture of end-use articles, such as permanent magnets.
- Inventors:
-
- Ames, IA
- Nevada, IA
- Des Moines, IA
- Woodward, IA
- Issue Date:
- Research Org.:
- Ames Laboratory (AMES), Ames, IA; Iowa State Univ., Ames, IA (United States)
- OSTI Identifier:
- 868167
- Patent Number(s):
- 5087291
- Application Number:
- 07/591,046
- Assignee:
- Iowa State University Research Foundation, Inc. (Ames, IA)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- DOE Contract Number:
- W-7405-ENG-82
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- rare; earth-transition; metal; scrap; treatment; method; iron; nd-fe-b; melted; reduce; levels; tramp; oxygen; nitrogen; impurities; therein; reduced; melt; virtue; reaction; earth; form; dross; purified; separated; reuse; acceptable; treated; alloy; manufacture; end-use; articles; permanent; magnets; treatment method; permanent magnet; transition metal; rare earth; permanent magnets; earth-transition metal; rare earth-transition; metal scrap; tramp impurities; nd-fe-b scrap; nitrogen impurities; /75/
Citation Formats
Schmidt, Frederick A, Peterson, David T, Wheelock, John T, Jones, Lawrence L, and Lincoln, Lanny P. Rare earth-transition metal scrap treatment method. United States: N. p., 1992.
Web.
Schmidt, Frederick A, Peterson, David T, Wheelock, John T, Jones, Lawrence L, & Lincoln, Lanny P. Rare earth-transition metal scrap treatment method. United States.
Schmidt, Frederick A, Peterson, David T, Wheelock, John T, Jones, Lawrence L, and Lincoln, Lanny P. Tue .
"Rare earth-transition metal scrap treatment method". United States. https://www.osti.gov/servlets/purl/868167.
@article{osti_868167,
title = {Rare earth-transition metal scrap treatment method},
author = {Schmidt, Frederick A and Peterson, David T and Wheelock, John T and Jones, Lawrence L and Lincoln, Lanny P},
abstractNote = {Rare earth-transition metal (e.g. iron) scrap (e.g. Nd-Fe-B scrap) is melted to reduce the levels of tramp oxygen and nitrogen impurities therein. The tramp impurities are reduced in the melt by virtue of the reaction of the tramp impurities and the rare earth to form dross on the melt. The purified melt is separated from the dross for reuse. The oxygen and nitrogen of the melt are reduced to levels acceptable for reuse of the treated alloy in the manufacture of end-use articles, such as permanent magnets.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 11 00:00:00 EST 1992},
month = {Tue Feb 11 00:00:00 EST 1992}
}
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