Earticle

초록

영어

In 2013, highly concentrated rare-earth-rich mud (REE-rich mud) was discovered around Minami-Torishima Island, presenting an opportunity to develop a new source of rare-earth elements (REEs). This study proposes a new method for selectively removing non-REE components using magnetic separation. First, we calculated the theoretical levitation positions of the target minerals using the magneto-Archimedes method, considering the mineral density, magnetic susceptibility, and magnetic field distribution of a high-temperature superconducting (HTS) bulk magnet. Next, we conducted separation experiments to selectively isolate REEadsorbed apatite from a simulated mud sample consisting of a mixture of apatite, montmorillonite, quartz, and zeolite. The results demonstrated that non-apatite minerals were successfully removed using magnetic levitation method. Based on these results, we applied the method to actual core samples (REE-rich mud) fromthe coast of Minami-Torishima Island. These experiments showed that phillipsite could be selectively separated from the core sample using magnetic levitation. However, the overall weight reduction was less significant than that achieved with the simulated REE-rich mud. This discrepancy was attributed to the inability to separate the paramagnetic mineral montmorillonite into the levitated fraction, because of its swelling property and cation exchange capacity, and location-dependent variability in the mineral composition of the core samples. Possible solutions to this problem include improving the sample dispersion and combining this method with other separation techniques.

목차

Abstract
1. INTRODUCTION
2. PROPERTIES OF TARGET MATERIALS
2.1. Magnetic properties of minerals constituting REE-richmud
3．PRINCIPLE OF MAGNETO-ARCHIMEDES METHOD
4. DETERMINATION OF MAGNETIC SEPARATION CONDITIONS
5. MAGNETIC SEPARATION EXPERIMENTS USING SIMULATED REE-RICH MUD
5.1. Composition of simulated REE-rich mud
5.2. Experimental Procedure for Magnetic Separation
5.3. Results and discussion
6. MAGNETIC SEPARATION EXPERIMENT OF CORE SAMPLES
6.1 Description of core samples
6.2 Verification of Levitation
6.3 Experimental methods
6.4 Results and discussion
6.5 Mineral identification of levitated and settled fractions
7. STUDY ON IMPROVING THE PRECISION OF MAGNETIC SEPARATION
8. CONCLUSION
ACKNOWLEDGMENT
REFERENCES

키워드

저자

• Satoshi Nishikawa [ Graduate School of Engineering, The University of Osaka, Osaka, Japan ]
• Yoko Akiyama [ Graduate School of Engineering, The University of Osaka, Osaka, Japan ] Corresponding Author
• Tatsuya Mori [ Graduate School of Engineering, The University of Osaka, Osaka, Japan ]
• Yuichiro Manabe [ Graduate School of Engineering, The University of Osaka, Osaka, Japan ]
• Fuminobu Sato [ Graduate School of Engineering, The University of Osaka, Osaka, Japan ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국초전도·저온논문지 (구 한국초전도저온공학회논문지) [Progress in Superconductivity and Cryogenics]

• 간기

  계간

• pISSN

  1229-3008

• eISSN

  2287-6251

• 수록기간

  1999~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 427 DDC 537