Journal article

Mathematical modelling of batch sedimentation subject to slow aggregate densification

Yi Zhang, Paul Grassia, Alastair Martin, Shane P Usher, Peter J Scales

CHEMICAL ENGINEERING SCIENCE | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2015

Abstract

This paper considers an initially networked suspension in a batch settler subjected to very slow aggregate densification. The so-called pseudo-steady state aggregate densification theory developed by van Deventer (2012) has been extended to the case of initially networked suspensions. The solids behaviour and the evolutions of the suspension height and the consolidated bed height in the batch settler have been predicted using the extended pseudo-steady state theory. Different formulae for the weight-bearing strength of the consolidated bed (so-called weak gel and strong gel formulae, which differ near the top of the bed) are considered. The suspension height approaches the consolidated bed h..

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