Flow and heat transfer simulation in a flash smelting furnace

摘要

Fluid flow and heat transfer phenomena taking place in an industrial Outokumpu type flash smelting furnace were simulated with CFD software CFD2000 1.0 and PHOENICS 1.6.6. The computational domains and grids are basically the same as described in earlier reports. However, some changes and simplifications are made to the grids,especially in the reaction shaft model. The standard k-(epsilon) turbulence model and the six-flux radiation model were applied to the relevant flow and heat transfer computations. Both the Lagrangian and Eulerian treatment were used in two-phase flow calculations to describe the particle phase. All the two-phase simulations presented in this report are cold and isothermal, where the particles exchange only momentum with the gas phase. As a first attempt, combustion of gaseous sulphur with oxygen was used to represent the heat release from the copper concentrate oxidation reactions. The results presented in this report are preliminary reflecting the different stages of the model development. (orig.)