STUDY ON THE THERMAL EFFICIENCY AND HEAT TRANSFER OF POST COMBUSTION FOR SMELTING REDUCTION FURNACE

The objectives of this smelting reduction furnace study are to understand the heat transfer, fluid mechanics and combustion process inside a smelting reduction furnace, to develop the parametric control for the combustion optimization and to minimum energy consumption for the smelting reduction. A cold flow analysis with k−ε turbulence model was used to investigate the velocity and pressure profiles inside the testing furnace, which provide the initial information for the combustion analysis. A finite rate/eddy-break-up model and mixture fraction/partial probability density function (PPDF) model are adopted and the results compared. Numerical simulations revealed that a stagnation region present on the top opposite to the exit of the non-symmetrical smelting furnace. The mean furnace temperature that calculated from PPDF model is higher than that predicted from eddy-break-up model. The future research topics are also presented.