Elsevier

Powder Technology

Volume 20, Issue 1, May–June 1978, Pages 89-97
Powder Technology

A quantitative analysis of the mixing of two segregating powders of different density in a gas-fluidised bed

https://doi.org/10.1016/0032-5910(78)80013-8Get rights and content

Abstract

The mixing/segregation behaviour of binary mixtures of powders differing in density has been studied experimentally. The mixing index M can be related to the fluidising velocity U by means of the logistic equation:

where
UTO in the gas velocity at which M = 0.5, and UF is the lower of the two minimum fluidisation velocities. UTO, the take-over velocity, is related to the size, density, shape and proportion of the two powders and the bed aspect ratio. A complex empirical equation including all these factors has been obtained.

If there is no density difference between the powders, the logistic equation can still be used provided UTO is evaluated experimentally.

References (14)

  • R. Hooke et al.

    J. Assoc. Comput. Mach.

    (1961)
  • P.N. Rowe et al.

    Trans. Inst. Chem. Eng.

    (1972)
    P.N. Rowe et al.

    Trans. Inst. Chem. Eng.

    (1972)
  • L.Y.-L. Cheung
    (1976)
  • A.W. Nienow et al.

    Proc. 1st Eur. Symp. on Recovery of Materials and Energy from Refuse

    (1976)
  • A.J. Agbim et al.

    Chem. Eng. Sci.

    (1971)
  • H.H. Rosenbrock

    Comput. J.

    (1960)
  • A.J. Agbim
    (1970)
There are more references available in the full text version of this article.

Cited by (120)

View all citing articles on Scopus
View full text