New approaches to dewatering of suspensions in the minerals industry

P. J. Scales, B. J. Gladman, S. P. Usher, M. J. Rudman

Research output: Contribution to conferencePaper

Abstract

The performance of dewatering processes such as thickening has been predicted by applying modern dewatering theory which properly accounts for compression of the suspension network structure. The method involves the characterisation of the variation in compressibility and permeability of a feed slurry over the relevant concentration range, from the feed solids concentration to the output solids concentration. These material properties are then used in thickener dewatering models to predict performance for a range of operating conditions. The role of shear in causing enhancement of dewatering that would not normally be accounted for in simple laboratory tests has now been quantified. A critical shear rate above which shear enhanced dewatering is diminished has also been identified and the incorporation of these effects into the phenomenological dewatering models has now demonstrated better confluence of model predictions and full scale thickener performance.

Original languageEnglish
Pages1637-1642
Number of pages6
Publication statusPublished - 1 Dec 2006
Externally publishedYes
Event23rd International Mineral Processing Congress, IMPC 2006 - Istanbul, Turkey
Duration: 3 Sep 20068 Sep 2006

Conference

Conference23rd International Mineral Processing Congress, IMPC 2006
CountryTurkey
CityIstanbul
Period3/09/068/09/06

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