Desirable Blast Velocity from the View Point of Fine Coke Deposit around Blast Furnace Raceway

Synopsis : Using a two-dimensional model of the lower part of a blast furnace and a raceway hot model, the formation of raceway and furnace core and the coke degradation have been studied to clarify the desirable blast velocity of a blast furnace. The results obtained are summarized as follows. (1) The reliable raceway penetration DR(m) is derived as shown by the equation below, and it is estimated that the penetration in large blast furnaces is about 1.4 m.