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

Authors: Yuhua Pan, Peter J. Witt, Dongsheng Xie

Addresses: CSIRO Process Science and Engineering, CSIRO Minerals Down Under Flagship, Box 312, Clayton South, VIC 3169, Australia. ' CSIRO Mathematics, Informatics and Statistics, CSIRO Minerals Down Under Flagship, Box 312, Clayton South, VIC 3169, Australia. ' CSIRO Process Science and Engineering, CSIRO Minerals Down Under Flagship, Box 312, Clayton South, VIC 3169, Australia

Abstract: Molten slag is atomised by a spinning disc into droplets that are quenched via cold air to produce glassy slag granules. Steady-state two-dimensional CFD simulations of the multiphase flow and heat transfer in the slag and air were carried out. Also considered in the CFD model is conjugate heat transfer between liquid slag, solidified slag and the disc. The thickness and temperature of the slag film prior to its rupture were predicted. Influence of factors including the slag pouring rate, temperature and the disc spinning speed on the slag film thickness and temperature were investigated.

Keywords: spinning disc; dry granulation; liquid slag; simulation; modelling; CFD; free surface flow; heat transfer; dry slag granulation; molten slag; glassy slag granules; computational fluid dynamics; slag pouring rate; slag temperature; disc spinning speed; slag film thickness; slag film temperature.

DOI: 10.1504/PCFD.2010.035362

Progress in Computational Fluid Dynamics, An International Journal, 2010 Vol.10 No.5/6, pp.292 - 299

Published online: 26 Sep 2010 *

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