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Journal of Central South University

, Volume 18, Issue 2, pp 374–380 | Cite as

Modularized dry coal beneficiation technique based on gas-solid fluidized bed

  • Yue-min Zhao (赵跃民)Email author
  • Gong-min Li (李功民)
  • Zhen-fu Luo (骆振福)
  • Chun-cheng Liang (梁春成)
  • Li-gang Tang (唐利刚)Email author
  • Zeng-qiang Chen (陈增强)
  • Hong-bo Xing (邢洪波)
Article

Abstract

A 40–60 t/h modularized dry coal beneficiation process with a novel method to control the bed was designed around a gas-solid fluidized bed separator. Furthermore, the hydrodynamics of medium-solids consisting of wide-size-range magnetite powder (0.3–0.06 mm) and <1 mm fine coal were numerically studied. The simulation results show that the fluidization performance of the wide-size-range medium-solid bed is good. The separation performance of the modularized system was then investigated in detail using a mixture of <0.3 mm magnetite powder (mass fraction of 0.3–0.06 mm particles is 91.38 %) and <1 mm fine coal as solid media. The experimental results show that at separation densities of 1.33 g/cm3 or 1.61 g/cm3, 50–6 mm coal can be separated effectively with probable error, E, values of 0.05 g/cm3 and 0.06 g/cm3, respectively. This technique is beneficial for saving water resources and for the clean utilization of coal.

Key words

dry coal beneficiation modularization gas-solid fluidized bed wide-size-range medium-solids 

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References

  1. [1]
    DWARI R K, RAO K H. Dry beneficiation of coal—A review [J]. Mineral Processing and Extractive Metallurgy Review, 2007, 28(3): 177–234.CrossRefGoogle Scholar
  2. [2]
    FRASER T, YANCEY H F. Process of separating loosely-mixed materials. US 1534846 [P]. 1925-04-21.Google Scholar
  3. [3]
    YOUROVSKY A Z, GOROSHKO V D, KORSHUNOV V I, REMESNIKOV I D. New dry processes for coal preparation—magnetic, aero-suspension, radiometric [C]// Proceedings of 4th International Coal Preparation Congress. Harrogate, Yorkshire, 1962: 403–411.Google Scholar
  4. [4]
    DOUGLAS E, JOY A S, WALSH T, WHITEHEAD A. Development of equipment for the dry concentration of minerals [J]. Filtration and Separation, 1972, 9: 532–538, 544.Google Scholar
  5. [5]
    BEECKMANS J M, MINH T. Separation of mixed granular solids using the fluidized counter current cascade principle [J]. The Canadian Journal of Chemical Engineering, 1977, 55(5): 493–496.CrossRefGoogle Scholar
  6. [6]
    DONG X, BEECKMANS J M. Separation of particulate solids in a pneumatically driven counter-current fluidized cascade [J]. Powder Technology, 1990, 62(3): 261–267.CrossRefGoogle Scholar
  7. [7]
    MAK C, CHOUNG J, BEAUCHAMP R, KELLY D J A, XU Z. Potential of air dense medium fluidized bed separation of mineral matter for mercury rejection from Alberta sub-bituminous coal [J]. International Journal of Coal Preparation and Utilization, 2008, 28(2): 115–132.CrossRefGoogle Scholar
  8. [8]
    ZHANG C, CHEN G, YANG T, LU G, MAK C, KELLY D, XU Z. An investigation on mercury association in an Alberta sub-bituminous coal [J]. Energy & Fuels, 2007, 21(2): 485–490.CrossRefGoogle Scholar
  9. [9]
    SAHU A K, BISWAL S K, PARIDA A. Development of air dense medium fluidized bed technology for dry beneficiation of coal—A review [J]. International Journal of Coal Preparation and Utilization, 2009, 29(4): 216–241.CrossRefGoogle Scholar
  10. [10]
    TANAKA Z, OSHITANI J, KUBO Y, ZUSHI T. Dry coal cleaning in Drewboy bath type by dry heavy medium [C]// Proceedings of First International Symposium on Dry Coal Cleaning, Clean Coal Technology. Xuzhou: China University of Mining and Technology Press, 2002: 73–78.Google Scholar
  11. [11]
    de JONG T P R, MESINA M B, KUILMAN W. Electromagnetic de-shaling of coal [J]. Physical Separation in Science and Engineering, 2003, 12(4): 223–236.CrossRefGoogle Scholar
  12. [12]
    van HOUWELINGEN J A, de JONG T P R. Dry cleaning of coal: review, fundamentals and opportunities [J]. Geologica Belgica, 2004, 7(3/4): 335–343.Google Scholar
  13. [13]
    WEITKAEMPER L, WOTRUBA H, WEITKAEMPER L, WOTRUBA H. Effective dry density beneficiation of fine coal using a new developed fluidized bed separator [C]// Proceedings of 16th International Coal Preparation Congress. Littleton: Society for Mining, Metallurgy, and Exploration, 2010: 587–595.Google Scholar
  14. [14]
    ZHAO Yue-min, LUO Zhen-fu, CHEN Zeng-qiang, TANG Li-gang, WANG Hai-feng, XING Hong-bo. The effect of feed-coal particle size on the separating characteristics of a gas-solid fluidized bed [J]. Journal of the South Africa Institute of Mining and Metallurgy, 2010, 110(5): 219–224.Google Scholar
  15. [15]
    LUO Zhen-fu, ZUO Wei, TANG Li-gang, ZHAO Yue-min, FAN Mao-ming. Preparation of solid medium for use in separation with gas-solid fluidized beds [J]. Mining Science and Technology, 2010, 20(5): 743–746.Google Scholar
  16. [16]
    TANG Li-gang, ZHAO Yue-min, LUO Zhen-fu, LIANG Chun-cheng, CHEN Zeng-qiang, XING Hong-bo. The Effect of fine coal particles on the performance of gas-solid fluidized beds [J]. International Journal of Coal Preparation and Utilization, 2009, 29(5): 265–278.CrossRefGoogle Scholar
  17. [17]
    ZHAO Yue-min, TANG Li-gang, LUO Zhen-fu, LIANG Chun-cheng, XING Hong-bo, WU Wan-chang, DUAN Chen-long. Experimental and numerical simulation studies of the fluidization characteristics of a separating gas-solid fluidized bed [J]. Fuel Processing Technology, 2010, 91(12): 1819–1825.CrossRefGoogle Scholar

Copyright information

© Central South University Press and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Yue-min Zhao (赵跃民)
    • 1
    Email author
  • Gong-min Li (李功民)
    • 2
  • Zhen-fu Luo (骆振福)
    • 1
  • Chun-cheng Liang (梁春成)
    • 1
  • Li-gang Tang (唐利刚)
    • 3
    Email author
  • Zeng-qiang Chen (陈增强)
    • 1
  • Hong-bo Xing (邢洪波)
    • 1
  1. 1.School of Chemical Engineering and TechnologyChina University of Mining and TechnologyXuzhouChina
  2. 2.Tangshan Shenzhou Manufacturing Co., Ltd.TangshanChina
  3. 3.State Key Laboratory of Multiphase Complex Systems, Institute of Process EngineeringChinese Academy of SciencesBeijingChina

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