Earticle

초록

영어

A large amount of cesium-contaminated soil was generated as a result of the decontamination work following the accident at the Fukushima Daiichi Nuclear Power Plant. To reduce the final disposal volume of contaminated soil, it is necessary to separate the contaminated soil into low- and high-dose soil components and reuse the low-dose soil under 8000 Bq/kg. We have investigated a magnetic separation technique to reduce the volume of the contaminated soil. Magnetic separation is a volume reduction technology that utilizes these differences in magnetic properties. However, the high-gradient magnetic separation technique (HGMS) we have been studied has problems such as clogging of filters and low separation accuracy due to the passage of 2:1 type clay minerals with small particle diameters. In this study, we propose a new separation method using a cyclone-type magnetic separator that focuses not only on magnetic susceptibility but also on differences in particle size. The cyclone-type magnetic separator can separate 2:1 type clay minerals from 1:1 type clay minerals by inducing 1:1 type clay minerals with large particle diameters to the outside of the cylinder and 2:1 type clay minerals with small and large particle diameters to the inside of the cylinder through the difference in the combined magnetic and centrifugal forces acting on soil particles. Separation accuracy was evaluated using simulated soil consisting of vermiculite and kaolinite. Based on these results, the reduction rate of the radioactivity concentration was estimated, and the design guidelines of the device for practical use were discussed.

목차

Abstract
1. INTRODUCTION
2. CONSEPT OF CYCLONE-TYPE MAGNETIC SEPARATION TECHNOLOGY
2.1. Magnetic Separation of Clay Minerals
2.2. Estimation of Forces Acting on Soil Particles
3. EXPERIMENTAL METHOD
3.1. Magnetic Separation Experiment
3.2. Post-separation Analysis
4. RESULTS AND DISCUSSION
4.1. Weight and Composition of Soil After Separation
4.2. Particle Size Distribution of Soil after Magnetic Separation Experiment
4.3. Estimation of Radioactivity Concentration from Separation Ratio of Soil Components
5. CONCLUSION
REFERENCES

키워드

저자

• Hina Miura [ Graduate School of Engineering, Osaka University, Osaka, Japan ]
• Yoko Akiyama [ Graduate School of Engineering, Osaka University, Osaka, Japan ] Corresponding Author
• Yuichiro Manabe [ Graduate School of Engineering, Osaka University, Osaka, Japan ]
• Fuminobu Sato [ Graduate School of Engineering, Osaka University, 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