Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Separation of High Purity and High Carbon Fly Ash by Electrostatic Method

정전선별법에 의한 고순도 석탄회와 고탄소 석탄회의 분리

  • Published : 2003.04.01
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Abstract

In 2001, Korea produced a total of 4.91 million metric tons of fly ash, approximately 63.3% of which was recycled. Almost all of the recycled fly ash are used in concrete mixtures and cement industry. Therefore, in order to develop a new usage to increase the utilization of the fly ash, conductive induction was used in this research rather than triboelectrostatic. By applying conductive induction, we could verify the possibility of obtaining high purity fly ash below 1%LOI and high carbon fly ash over 70%LOI from raw fly ash. In this test, the potential difference between the two electrodes was conducted by changing the range of 8 to 16 kV.

2001년 국내에서는 총 491만톤의 석탄회가 발생되어, 이중 약 63.3%가 재활용되고 있으나 이들의 대부분은 콘크리트 혼합물과 시멘트 산업에 사용되고 있다. 그러므로 본 연구에서는 석탄회의 활용도를 높이기 위한 새로운 용도개발을 위한 목적으로 마찰대전법 대신 정전유도법을 사용하였다. 정전유도법을 적용하여 석탄회로부터 1%LOI 이하의 고순도 석탄회와 70%LOI 이상의 고탄소질 석탄회를 얻을 수 있음을 확인하였으며, 본 실험에서 두 전극간의 전위차는 8～16kV 범위로 적용하였다.

Keywords

References

  1. 이희상: '국내외 석탄회 발생 및 처리현황', 석탄회 활용기술 연구회 워크숍, 3-15 (2002)
  2. Kelly, E. G. and Spottiswood, D. J.: 'The Theory Electro static Separations: A Review Part II. Particle Chargeing', Mineral Engineering, 2(2), 193-205 (1989) https://doi.org/10.1016/0892-6875(89)90040-X
  3. Tennal, K. B. et al.: 'Triboelectric Separation of Granular Matehals', IEEE Industry Applications Society Annual Meeting, Louisiana, October 5-8 pp.1724-1729 (1997)
  4. Ban H. et al.: 'Fundamentals of Triboelectrostatic Separation: A Discussion on Particle Charge, Particle Size and Separation', Preprint, Annual Meeting of the Society of Mining, Metallurgy and Exploration, Inc. (SME), Denver, CO. (1997)
  5. Hepher, N. M.: 'Apparatus for Separating Particulate Materials', U. S. Patent 4,556,486 (1985)
  6. Inculet, I. I., Norberg, K. E. and Hepher, N. M.: 'Method of Apparatus for Separation Particulate Materials', U.S. Patent 4,517,078 (1985)
  7. Stencel, J. M., Schaefer, J. L. Ban, H. and Finseth, D.: 'Method and Apparatus for Triboelectric-Centrifugal Separation', U. S. Patent 5,755,333 (1998)
  8. Stencel, J. M. et al.: 'Technology Development for Carbon-Ash Beneficiation by Pneumatic Transport, Triboelectric Processing', 1999 International Ash Utilization Symposium, October 18-20, Lexington, Kentucky (1999)
  9. Edward K. Levy and Carlos Herrera: 'Ash Beneficiation Using Fluidized Bed Separation, 1997 International Ash Utilization Symposium, 467-470, Lexington, Kentucky (1977)
  10. Inculet, I. I.: 'Electrostatic Mineral Separation, Research Studies Press Ltd', London, 85-93 (1984)
  11. Bittner, J. D.: 'STI Fly Ash Separation System: Operating History at New England Power's Brayton Point Plant', 12th International Symposium on Coal Combustion By-Product(CCB) Management and Use. EPRI TR-107055-V2, 2, 62-1-64-5 (1997)
  12. Roe-Hoan Yoon, Oh-Hyung Han, Eric S. Yan and Byung-Wook Park: 'Electrostatic Method of Separating Particulate Materials', U.S. Patent 6,320,148 B1 (2001)
  13. 한오형, 전호석, Roe-Hoan Yoon: '석탄회로부터 미연탄소분 제거를 위한 정전분리기술 개발', 한국자원공학회지, 38(6), 416-423 (2001)