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Metallurgist
Published in: Metallurgist 5-6/2015

01-09-2015

Recycling Rare-Earth-Metal Wastes by Pyrometallurgical Methods

Authors: E. G. Polyakov, A. S. Sibilev

Published in: Metallurgist | Issue 5-6/2015

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Abstract

Recycling secondary raw materials that contain rare-earth metals (REMs) can have a significant impact on the available supply of these valuable and scarce metals in the marketplace. The current use of pyrometallurgical methods to recover REMs from these materials is analyzed, with the focus being on such waste products as high-coercivity magnets and nickel-metal-hydride batteries. The analysis includes a discussion of the advantages and disadvantages of several pyrometallurgical processes, including melting, electroslag remelting, extraction with the use of molten magnesium, high-temperature treatment using halides and chlorides of metals, and the electrolysis of molten salts. Data are presented on the successful commercial use of pyrometallurgical processes in the recycling of REMs.
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Metadata
Title
Recycling Rare-Earth-Metal Wastes by Pyrometallurgical Methods
Authors
E. G. Polyakov
A. S. Sibilev
Publication date
01-09-2015
Publisher
Springer US
Published in
Metallurgist / Issue 5-6/2015
Print ISSN: 0026-0894
Electronic ISSN: 1573-8892
DOI
https://doi.org/10.1007/s11015-015-0111-8

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