[ Papers ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 31, No. 4, pp.233-239

ISSN: 2508-5107 (Online)

Print publication date 15 Aug 2022

Received 17 May 2022 Revised 04 Jul 2022 Accepted 11 Jul 2022

DOI: https://doi.org/10.7735/ksmte.2022.31.4.233

NdFeB계 희토류 자석 스크랩에서 에멀젼 플로우 공법을 이용한 중희토류의 용매추출 공정 연구

김병준^a ; 김용성^b^{, *}

Study on the Solvent Extraction Process of Heavy Rare Earth Using Emulsion Flow Method from NdFeB Based Rare Earth Magnet Scrap

Byeong Jun Kim^a ; Young Sung Kim^b^{, *}

aGraduate School of NIDE Fusing Technology, Seoul National University of Science & Technology
bSeoul Tech NDT Research Center, Seoul National University of Science & Technology

Correspondence to: ^*Tel.: +82-2-970-6804 E-mail address: youngsk@seoultech.ac.kr (Young Sung Kim).

Abstract

In this study, emulsion flow equipment was newly manufactured by modifying the shape of the oil phase nozzle and the filter pore size. An experiment to find the optimal conditions for separating Nd and Dy in the chlorinated rare earth aqueous solution recovered from the dissolution process of the spent Nd magnet was performed with this equipment. The emulsion filling rate was the highest at 100% when the nozzle for spraying oil phase inside the cylinder was type B with a jaw height of 5 mm above the filter and the filter pore size was 40 to 100 μm (P2). Therefore, it was confirmed that these are the most optimal emulsion process conditions in the nozzle when separating Nd and Dy by the emulsion flow method.

Keywords:

Solvent extraction, Emulsion flow, NdFeB magnet, Rare earth, Separating

Acknowledgments

이 논문은 2022년도 에너지기술개발사업 과제번호 20205210100070의 연구비지원으로 수행되었습니다.

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Byeong Jun Kim

Master Candidate in the Graduate School of NIDE Fusing Technology, Seoul National University of Science and Technology. His research interest is Material and Nano-Micro Technology.

E-mail: kbj1020@seoultech.ac.kr

Young Sung Kim

Professor in the NDT Research Center, Seoul National University of Science and Technology. His research interest in Material and Nano-Micro Technology.

E-mail: youngsk@seoultech.ac.kr