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Application of the Hausner ratio to fluidised powder systems

5 Application of the Hausner ratio to fluidised powder systems [Pg.20]

Geldart et al. (1984) in an extension of the work on the classification of fluidisable powders used the ratio of tapped density to a loosely packed density (Hausner ratio) to predict the type of particle movement that can occur with powders having various degrees of cohesiveness. Re-appraisal of this work shows that with a Hausner ratio below 1.27 (Table 1.8), all the powders investigated could be classified as aeratable. Powders with a Hausner ratio above [Pg.20]

5 were, however, cohesive and difficult to fluidise. There was also an intermediate group between the Hausner ratios of 1.3 and 1.5 which showed intermediate fluidisable properties and behaviour. [Pg.20]




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