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Flotation for Improving Grade of Domestic Fine Coal

국내산(國內産) 미립(微粒) 석탄(石炭)의 품위향상(品位向上)을 위한 부유선별(浮遊選別) 연구(硏究)

  • Han, Oh-Hyung (Department of Energy & Resources Engineering, Chosun University) ;
  • Kim, Min-Gyu (Department of Energy & Resources Engineering, Chosun University) ;
  • Kim, Byoung-Gon (Korea Institute of Geoscience and Mineral Resources)
  • 한오형 (조선대학교 공과대학 에너지.자원공학과) ;
  • 김민규 (조선대학교 공과대학 에너지.자원공학과) ;
  • 김병곤 (한국지질자원연구원)
  • Received : 2013.11.14
  • Accepted : 2013.12.10
  • Published : 2013.12.31

Abstract

The purpose of this study is to confirm the possibility of obtaining high grade coal from 57.39% of fixed carbon fine coal. Also, the mineralogical, physical/chemical and liberation characteristics are to be identified to decrease in ash amount, during the pre-processing of clean coal technology. In this study, batch flotation and CPT column flotation proper for the processing of fine particles were used with the variation in kinds and quantity of frother, collector and depressant. Also air flow rate and feeding rates were examined. As a result of batch flotation using 20% of pulp density DMU 101 collector(100 mL/ton), AF65 frother(300 mL/ton), sodium metaphosphate depressant (1 kg/ton), 67.57% of ash rejection and 70.90% of combustible recovery were obtained. The result of CPT column flotation was 85.59% of ash rejection and 88.97% of combustible recovery under the conditions of 5% of pulp density, DMU-101 collector (100 mL/ton), AF65 frother(10 L/ton), SMP depressant(1 kg/ton), wash water(100 mL/min.) and air flow rate(1,200 mL/min.).

본 연구는 고정탄소 57.39%의 미립 석탄으로부터 고품위 석탄 생산의 가능성을 확인하고자 하여 광물학적, 물리화학적 방법과 단체분리도의 특성을 파악하여 청정 석탄 기술의 처리과정에서 회분을 감소시키는데 목적이 있다. 본 연구에서 일반부선과 미립자 처리에 적합한 column 부선기의 최신형인 CPT column 부선을 적용하여 기포제, 포수제, 억제제의 종류와 첨가량의 변화, 공기주입량, 급광량 그리고 광액농도에 따른 영향을 확인하였다. 먼저 광액농도 20%, 포수제 DMU-101 (100 mL/ton), 기포제 AF65(300 mL/ton), 억제제 sodium metaphosphate(1 kg/ton)의 실험조건으로 일반부선을 실시한 결과, 회분제거율과 가연분회수율(combustible recovery)을 각각 67.57%와 70.90%를 얻었으며, 광액농도 3%, 포수제 DMU-101(100mL/ton), 기포제 AF65(10 L/ton), 억제제 sodium metaphosphate(1 kg/ton), 세척수(100 mL/min.)와 공기주입량(1,200 mL/min.)인 조건에서 CPT column 부선을 실시한 결과 회분제거율과 가연분회수율이 각각 85.59%와 88.97%인 결과를 얻었다.

Keywords

References

  1. H. S. Joen, O. H. Han, S. M. Shin and R. H. Yoon, 2002 : "Development of Recycling Technique of Mill Reject Produce using Ttiboelectrostatic Separation", The Korean Institute of Resources Recycling, Vol. 11, No. 2, pp.20-27.
  2. G. M. Lee, 1985 : "Mineral processing", pp.219-305, Bando publisher, Seoul, Korea.
  3. S. W. Yoo, H. K. Park and M. Y. Jung, 2009 : Effect of the Oxidation of Fixed Carbon on the Oily Collector Addition for the Coal Briquette Ash Flotation, Journal of The Korean Society of Mineral and Energy Resources Engineers, Vol. 46, No. 5, p.58.
  4. M. D. Brown, G. T. Adel, and R. H. Yoon, 1984 : A Laboratory Stirred Ball Mill for Fine Grinding of Coal, Proceedings of 4th Annual Collegiate Association of Mining Education, Lexington, Kentucky, U.S.A, October, 1984.
  5. Finch and Dobby, 1990; Groopo and Parekh, 1990; Goodall and O'Connor, 1992; Tao etal, 2000.
  6. R. H. Yoon, G. T. Adel and G. H. Luttrell., 1987 : Development of The Microbubble Column Flotation Process, Proceedings of 2nd International Conference on Processing and Utilization of High-Sulfur Coals, Carbondale, Illinois, U.S.A, September 27-October 1, 1987.
  7. J. A. Finch and G. S. Dobby, 1989 : Column Flotation, p.157. Pergamon Press.
  8. Julius B. R. Rubinstein, 1995 : Column Flotation Processes, Designs and Practices. Vol. 2, p.143, Gordon and Breach Science Publishers, Switzerland.
  9. Wills, B. A and T. J. Napier-Munn, 2006 : Mineral processing technology(7th), p.290, p.306. Elsevier, Burlington, USA.