Combustion characteristics of blast furnace gas in porous media burner

Abstract

This paper studied the combustion of blast furnace gas in a porous media burner. A numerical model method was established to analyze the combustion characteristics of blast furnace gas and solved by using the finite volume method. The temperature distribution, the position of the ignition, the flame structure, the recirculation zone and the concentration of the fuel were analyzed in the furnace. It was found that as increase of the distance between the porous body and the burner inlet, the temperature of the gas and the flame length increased and then decreased. When the porous media was located at 0.14 m in the burner, the peak temperature of the smoke gas was 1598 K at 0.36 m and the flame length was up to 0.41 m. With the porous media away from the burner nozzle, the ignition position was first away from the nozzle and then stabilize. The heat recirculation area increased and then stabilized. The position of the ignition was stable at 0.11 m. The flame length and flame radiation surface were wider and the oxygen concentration was the lowest at the exit, only 0.0043, when porous media was at 0.14 m.