Analysis of performance of an iron-bath reactor using computational fluid dynamics |
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| Institution: | 1. BHP Steel Research Laboratories, Old Port Kembla Road, Port Kembla NSW 2505, Australia;2. Minerals Technology, BHP Minerals, P.O. Box 188, Wallsend NSW 2287, Australia;3. School of Materials Science and Engineering, The University of NSW, Sydney NSW 2052, Australia |
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| Abstract: | The performance of an iron-bath reactor has been studied using a comprehensive numerical model that combines a computational fluid dynamics approach for the gas phase and a heat and mass balance model for the bath. The model calculates: - •coal, ore, flux and oxygen consumption;
- •post-combustion ratio (PCR);
- •heat-transfer efficiency (HTE);
- •off-gas temperature and composition;
- •heat transfer and chemical reactions between gas and iron and slag droplets; and
- •heat transfer between gas and bath, refractories and lance.
The model was validated with data reported by the Nippon Steel Corporation for a 100 t pilot plant, and the calculated and measured data are in good agreement. Modelling results showed that the dominant mechanisms of heat transfer from the gas to the bath are radiation to the slag surface and convection heat transfer to droplets. |
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