Heat and mass transfer during dewatering of slurries

M. Mezhericher, A. Levy, I. Borde

Research output: Contribution to conferencePaperpeer-review

Abstract

On the basis of our fully unsteady model of heat and mass transfer during dewatering of slurry droplets in atmospheric air, the simulations of silica slurry dehumidification under different conditions have been performed and distributions of pressure and fractions within the capillary pores of the wet particle have been predicted. The calculated data show two origins of possible silica particle cracking/rupture: temperature stresses as the result of temperature differences between the particle outer surface and its centre, and mechanical stresses as the result of pressure gradient in the capillary pores of the particle. The procedure for calculation of the stresses is proposed and typical distributions of total stresses during dewatering have been evaluated and presented. From the obtained results it can be concluded that the total tangential stress in the wet particle crust predominates over the radial component in the course of dewatering (in 5÷10 times greater) and the maximum stress value is positive and located at the inner surface of the particle crust.

Original languageEnglish
StatePublished - 1 Dec 2007
Event9th International Conference on Bulk Materials Storage, Handling and Transportation, ICBMH 2007 - Newcastle, NSW, Australia
Duration: 9 Oct 200711 Oct 2007

Conference

Conference9th International Conference on Bulk Materials Storage, Handling and Transportation, ICBMH 2007
Country/TerritoryAustralia
CityNewcastle, NSW
Period9/10/0711/10/07

ASJC Scopus subject areas

  • Transportation

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