Abstract
In this paper we examine the accuracy of three approximate solutions to the radiative transfer equation in the context of simulating a flash smelting furnace. We have built some one-phase models decoupled from flow and other means of heat transfer to validate them against the zone model solutions of the radiative transfer equation. The approximations have also been incorporated into an overall two-phase model of fluid flow and heat transfer in a particle-seeded gas jet enclosed within an axisymmetric cylindrical shaft with hot radiating walls. We have explored the sensitivity of the predictions of the overall model to the choice of the radiation approximation and some other model parameters.
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