ELUTRIATION OF FINE POWDERS FROM A FLUIDIZED BED OF A BINARY PARTICLE-MIXTURE

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著者

    • MA Xiaoxun
    • Department of Biological & Chemical Engineering, Gunma University
    • KATO Kunio
    • Department of Biological & Chemical Engineering, Gunma University

抄録

The elutriation of fine powders (Group C or A powders in Geldart's classification) from a fluidized bed of fines-coarse particle mixtures had been investigated in a transparent column with diameter of 7.1 cm and height of 102 cm. In the experiments, a silica sand (Group B in Geldart's classification) was used as the coarse particles, whereas several kinds of limestone powder varying in Geldart's classification from A to C were used as fines. The elutriation rate constant of fine powders was obtained by measuring the elutriation rate of powders, and the concentration of powders in the bed at steady state. The effects of superficial gas velocity, concentration of powders in the bed and diameter of powders on the elutriation rate constant were investigated. Experimental results showed that the elutriation rate constant of powders reaches a maximum at a certain powder size corresponding approximately to the boundary between Group A and C powders, giving an indication of the different elutriation mechanisms between Group A (or B) particles and C powders. This finding is contrary to the assumption made by existing models for the prediction of elutriation rate of Group A and B particles and may be attributed to the powder cohesivity.

収録刊行物

  • Journal of chemical engineering of Japan

    Journal of chemical engineering of Japan 29(2), 330-335, 1996-04-20

    The Society of Chemical Engineers, Japan

参考文献:  24件中 1-24件 を表示

被引用文献:  8件中 1-8件 を表示

各種コード

  • NII論文ID(NAID)
    10003814186
  • NII書誌ID(NCID)
    AA00709658
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00219592
  • データ提供元
    CJP書誌  CJP引用  J-STAGE 
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