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.