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Electrochemical recovery of rare earth elements from magnets : Conversion of rare earth based metals into rare earth fluorides in molten salts. / Abbasalizadeh, Aida; Malfliet, Annelies; Seetharaman, Seshadri; Sietsma, Jilt; Yang, Yongxiang.

In: Materials Transactions, Vol. 58, No. 3, 2017, p. 400-405.

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Abbasalizadeh, Aida ; Malfliet, Annelies ; Seetharaman, Seshadri ; Sietsma, Jilt ; Yang, Yongxiang. / Electrochemical recovery of rare earth elements from magnets : Conversion of rare earth based metals into rare earth fluorides in molten salts. In: Materials Transactions. 2017 ; Vol. 58, No. 3. pp. 400-405.

BibTeX

@article{054fb49f5fd040d3ac7f359fc85bca10,
title = "Electrochemical recovery of rare earth elements from magnets: Conversion of rare earth based metals into rare earth fluorides in molten salts",
abstract = "In the present work, selective extraction of rare earth (RE) metals from NdFeB magnets is investigated by studying the effects of various fluxes, viz. AlF3, ZnF2, FeF3 and Na3AlF6 in the LiF-NdFeB system. The aim is to convert RE from RE magnet into the fluoride salt melt. The results show the complete selective separation of neodymium (also dysprosium) from the magnet and formation of rare earth fluoride, leaving iron and boron unreacted. The formed rare earth fluoride can subsequently be processed in the same reactor through an electrolysis route so that RE can be deposited as a cathode product. The results of XRD and EPMA analysis of the reacted samples indicate that AlF3, ZnF2 and FeF3 can act as strong fluorinating agents for extraction of rare earth from NdFeB magnet, converting the RE to REF3. The results confirm the feasibility of the rare earth metals recovery from scrap NdFeB magnet as raw material. The fluoride conversion-electrolysis route suggested in the present work enables the extraction of rare earth metals in a single step using the above-mentioned fluxes.",
keywords = "Fluorination, Rare earth, Rare earth magnet, Recycling",
author = "Aida Abbasalizadeh and Annelies Malfliet and Seshadri Seetharaman and Jilt Sietsma and Yongxiang Yang",
year = "2017",
doi = "10.2320/matertrans.MK201617",
language = "English",
volume = "58",
pages = "400--405",
journal = "Materials Transactions",
issn = "1345-9678",
publisher = "Japan Institute of Metals (JIM)",
number = "3",

}

RIS

TY - JOUR

T1 - Electrochemical recovery of rare earth elements from magnets

T2 - Materials Transactions

AU - Abbasalizadeh, Aida

AU - Malfliet, Annelies

AU - Seetharaman, Seshadri

AU - Sietsma, Jilt

AU - Yang, Yongxiang

PY - 2017

Y1 - 2017

N2 - In the present work, selective extraction of rare earth (RE) metals from NdFeB magnets is investigated by studying the effects of various fluxes, viz. AlF3, ZnF2, FeF3 and Na3AlF6 in the LiF-NdFeB system. The aim is to convert RE from RE magnet into the fluoride salt melt. The results show the complete selective separation of neodymium (also dysprosium) from the magnet and formation of rare earth fluoride, leaving iron and boron unreacted. The formed rare earth fluoride can subsequently be processed in the same reactor through an electrolysis route so that RE can be deposited as a cathode product. The results of XRD and EPMA analysis of the reacted samples indicate that AlF3, ZnF2 and FeF3 can act as strong fluorinating agents for extraction of rare earth from NdFeB magnet, converting the RE to REF3. The results confirm the feasibility of the rare earth metals recovery from scrap NdFeB magnet as raw material. The fluoride conversion-electrolysis route suggested in the present work enables the extraction of rare earth metals in a single step using the above-mentioned fluxes.

AB - In the present work, selective extraction of rare earth (RE) metals from NdFeB magnets is investigated by studying the effects of various fluxes, viz. AlF3, ZnF2, FeF3 and Na3AlF6 in the LiF-NdFeB system. The aim is to convert RE from RE magnet into the fluoride salt melt. The results show the complete selective separation of neodymium (also dysprosium) from the magnet and formation of rare earth fluoride, leaving iron and boron unreacted. The formed rare earth fluoride can subsequently be processed in the same reactor through an electrolysis route so that RE can be deposited as a cathode product. The results of XRD and EPMA analysis of the reacted samples indicate that AlF3, ZnF2 and FeF3 can act as strong fluorinating agents for extraction of rare earth from NdFeB magnet, converting the RE to REF3. The results confirm the feasibility of the rare earth metals recovery from scrap NdFeB magnet as raw material. The fluoride conversion-electrolysis route suggested in the present work enables the extraction of rare earth metals in a single step using the above-mentioned fluxes.

KW - Fluorination

KW - Rare earth

KW - Rare earth magnet

KW - Recycling

UR - http://www.scopus.com/inward/record.url?scp=85016004685&partnerID=8YFLogxK

U2 - 10.2320/matertrans.MK201617

DO - 10.2320/matertrans.MK201617

M3 - Article

VL - 58

SP - 400

EP - 405

JO - Materials Transactions

JF - Materials Transactions

SN - 1345-9678

IS - 3

ER -

ID: 26022104