Research on operating characteristics of a hot blast stove

Abstract

The function of a hot blast stove is mainly used to supply stable hot blast for blast furnace, which of the cyclic operating process consists of an on-gas period and an on-blast period. In this study, a 3D thermal-dynamics model of a DiDier type hot blast stove was used to calculate the temperature distribution in the operating process. In order to simplify the model, a non-equilibrium porous medium model was applied to calculate the heat exchange process in the checker chamber. The simulation result was compared with the experimental data of the cold flue temperature, and the maximum error was found to be lower than 5%. Experimental result shows that the temperature of the flue gas/blast and the checker decreased along the flow direction in the on-gas period but increased along the flow direction in the on-blast period.