A mathematical model to characterise effects of liquid hold-up on bosh silicon transport in the dripping zone of a blast furnace |
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Authors: | S.K. Das Amrita Kumari D. Bandopadhay S.A. Akbar G.K. Mondal |
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Affiliation: | National Metallurgical Laboratory, Council of Scientific and Industrial Research, Jamshedpur 831 007, India |
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Abstract: | A first principle based mathematical model has been developed to characterise the effect of total liquid hold-up on the bosh silicon distribution behaviour in the dripping zone of a blast furnace. Two specific cases of hold-up behaviour have been investigated, namely, hold-up in the absence and in the presence of counter current gas flow conditions. The model exemplifies coupled phenomenon of chemical kinetics, transport processes and liquid hold-up to characterise the silicon behaviour in the dripping zone. The present modelling investigation shows that the bosh silicon level diminishes with the enhanced liquid hold-up in the dripping zone. Further, the influence of counter current gas flow on the hold-up is not significant. However, it has been observed that the liquid phase temperature reduces with increased liquid hold-up in dripping zone under steady state operating conditions. The model predictions of bosh silicon distribution have been validated with the published literatures (bulk values) and found to be in good agreement. |
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