Effects of Adding Different Proportions of H-2 to the Simulated Hydrogen-Rich Blast Furnace

The volume-fraction changes of CO2 and H2O after adding different proportions of H-2 to the hydrogen-rich blast furnace were simulated by thermodynamic calculations to evaluate the effects of H-2 on coke gasification in a blast furnace. Thermodynamic calculations indicated that the H2O content in the mixed gas gradually increased with higher H-2 content. The coke gasification kinetics effective diffusion coefficient D-e and interfacial reaction rate constant k(+) of the coke gasification reaction improved with higher H-2 content. In addition, the reactivity of cokes enhanced and the coke strength after reaction decreased with higher H-2 content. Mercury porosimeter experiments demonstrated that the coke gasification reaction mainly occurred on the surface.