CFD simulation of free surface flow and heat transfer of liquid slag on a spinning disc for a novel dry slag granulation process

• Autores: Yuhua Pan, Peter J. Witt, Dongsheng Xie
• Localización: Progress in computational fluid dynamics: an international journal, ISSN 1468-4349, Vol. 10, no. 5-6, 2010, págs. 292-299
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • A novel process for dry granulation of molten slag using a spinning disc is being developed by CSIRO. Molten slag is atomised by a spinning disc under centrifugal force and slag droplets are quenched and solidified via air to produce glassy granules and recover waste heat. In the present work, steady-state two-dimensional CFD simulations of fluid flow and heat transfer in the slag and the disc was carried out by using ANSYS CFX modelling package. The model domain is comprised of a solid disc, air and liquid slag before the slag film breaks up. Multiphase fluid flow and heat transfer were considered for the liquid slag with a free surface and the cooling air. The free surface was modelled with the continuum surface force method. Conjugate heat transfer between liquid slag and disc was included. The present model was applied to predict the thickness and temperature of the slag film prior to its rupture. Influences of factors including the pouring flowrate and temperature of liquid slag and the disc spinning rate on the slag film thickness and temperature were investigated.