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

The gasification behaviors of coke in a blast furnace with and without H-2 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 phi(CO)/phi(H-2), the temperature range of C gasification decreases and moves to the low-temperature zone. In the absence of H-2, the increase in phi(CO) increases the R-i, R-c. In the presence of H-2, phi(CO) and R-i increase, whereas the R-c, decreases. With the increase in phi(CO) and phi(H-2), the reduction of iron oxide tends to be carried out in the low-temperature zone, and the phi(CO2) and phi(H2O) produced in the high-temperature zone decrease, which is conducive to reducing the consumption of coke. The presence of H-2 intensifies the gasification of coke. The presence of H-2 aggravates the increase of coke porosity in the low temperature region, but it reduces the internal porosity in the high temperature region.