Size Degradation of Dead-man Coke by Reaction with Molten FeO in Blast Furnace

Abstract

Since particle size of deadman coke greatly affects the permeability of gas and liquid in the lower part of a blast furnace, elucidation of the behavior the replacement of deadman coke is an important subject. This paper describes the degradation of deadman coke by the reaction with molten FeO. With use of a one-dimensional reaction model in which two kinetic parameters were determined from a fundamental experiment, the degradation of the deadman coke in an actual blast furnace was simulated. The effect of FeO in molten slag on the degradation of deadman coke concerns reduction ratio on the melting down of ore temperature, and productivity. It takes about 2 weeks that vertical size distribution of degrading deadman coke is stationary pattern.