Phase Evolution During Extraction and Recovery of Pure Nd from Magnet

• Autorzy: Rasheed Mohammad Zarar , Nam Sun-Woo , Lee Sang-Hoon , Park Sang-Min , Cho Ju-Young , Kim Taek-Soo

Identyfikatory

DOI

10.24425/amm.2021.136414

• Języki publikacji: EN

Abstrakty

EN

Liquid Metal Extraction process using molten Mg was carried out to obtain Nd-Mg alloys from Nd based permanent magnets at 900°C for 24 h. with a magnet to magnesium mass ratio of 1:10. Nd was successfully extracted from magnet into Mg resulting in ~4 wt.% Nd-Mg alloy. Nd was recovered from the obtained Nd-Mg alloys based on the difference in their vapor pressures using vacuum distillation. Vacuum distillation experiments were carried out at 800°C under vacuum of 2.67 Pa at various times for the recovery of high purity Nd. Nd having a purity of more than 99% was recovered at distillation time of 120 min and above. The phase transformations of the Nd-Mg alloy during the process, from Mg₁₂Nd to α-Nd, were confirmed as per the phase diagram at different distillation times. Pure Nd was recovered as a result of two step recycling process; Liquid Metal Extraction followed by Vacuum Distillation.

Słowa kluczowe

EN

Liquid Metal Extraction; rare earth recycling; vacuum distillation; phase transformation

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2021
• Tom: Vol. 66, iss. 4
• Strony: 1001--1005
• Opis fizyczny: Bibliogr. 16 poz., fot., rys., tab.

Twórcy

autor

Rasheed Mohammad Zarar

• University of Science and Technology, Industrial Technology, Daejeon, Republic of Korea
• Korea Institute for Rare Metals, Korea Institute of Industrial Technology, Incheon, Republic of Korea

• https://orcid.org/0000-0003-4253-8848

autor

Nam Sun-Woo

• Korea Institute for Rare Metals, Korea Institute of Industrial Technology, Incheon, Republic of Korea

• https://orcid.org/0000-0001-7434-5034

autor

Lee Sang-Hoon

• Korea Institute for Rare Metals, Korea Institute of Industrial Technology, Incheon, Republic of Korea

• https://orcid.org/0000-0002-9667-459X

autor

Park Sang-Min

• Korea Institute for Rare Metals, Korea Institute of Industrial Technology, Incheon, Republic of Korea

• https://orcid.org/0000-0003-2194-0213

autor

Cho Ju-Young

• Korea Institute for Rare Metals, Korea Institute of Industrial Technology, Incheon, Republic of Korea

• https://orcid.org/0000-0001-5638-5016

autor

Kim Taek-Soo

• University of Science and Technology, Industrial Technology, Daejeon, Republic of Korea
• Korea Institute for Rare Metals, Korea Institute of Industrial Technology, Incheon, Republic of Korea

• https://orcid.org/0000-0002-0258-0526

Bibliografia

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Uwagi

1. This research was supported by a grant from project of development of environment friendly pyrometallurgy process for high purity HREE and materialization (Project number: 20000970) by Korea evaluation Institute of Industrial Technology (KEIT) in Republic of Korea.

2. Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).