溶融を伴う気液固体 3 相共存充填層における流れと伝熱(高炉内現象)(<特集>製銑)

概要

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In order to elucidate the mechanisms of flow and heat transfer in the cohesive zone in a blast furnace, model experiments at low temperature were carried out for the melting phenomenon, gas and liquid flow and heat transfer in the packed bed. Glass beads were packed and paraffin particles were charged on the top of the packed bed, which corresponded to the coke particle and ore respectively. A mathematical formulation was proposed for the simulation on simultaneous flow, heat transfer and melting phenomenon in the packed bed. The vectorial form of Ergun's equation was used for the gas flow. For the liquid flow, a dispersion-probability model was applied to obtain the flowing region, in which flow vector was computed from the modified Darcy's equation. Equations of heat balance on gas, solid and liquid were composed of the terms for convection, conduction, heat exchange between three phases and phase transformation. The finite difference method was used to compute flow and heat transfer in the packed bed. The grids for the computation were generated by the use of body-fitted coordinate. The experimental results showed good agreement with the values computed.
1992-07-01