Gasification Behaviors of Coke in a Blast Furnace with and without H2

The gasification behaviors of coke in a blast furnace with and without H2 were studied by thermodynamic calculations and high-temperature simulation experiments, and the change in the coke porosity was also studied. The results show that with the decrease in φ(CO)/φ(H2), the temperature range of C gasification decreases and moves to the low-temperature zone. In the absence of H2, the increase in φ(CO) increases the Ri, RC. In the presence of H2, φ(CO) and Ri increase, whereas the RC, decreases. With the increase in φ(CO) and φ(H2), the reduction of iron oxide tends to be carried out in the low-temperature zone, and the φ(CO2) and φ(H2O) produced in the high-temperature zone decrease, which is conducive to reducing the consumption of coke. The presence of H2 intensifies the gasification of coke. The presence of H2 aggravates the increase of coke porosity in the low temperature region, but it reduces the internal porosity in the high temperature region.