Gasification of iron-coke and co-gasification behavior of iron-coke and coke under simulated hydrogen-rich blast furnace condition

The gasification of iron-coke and the co-gasification behavior of iron-coke and coke in a hydrogen-rich environment were studied. The results indicate that the initial gasification temperature of iron-coke decreased with the increasing content of iron ore powder in the CO₂ and H₂O(g) atmosphere. In the atmosphere of 40% H₂O + 60% CO₂, the coke reactivity index (CRI) of iron-coke with the addition of 3% iron ore powder reached 58.7% and its coke strength after reaction (CSR) reached 56.5%. Due to the catalytic action of iron, the reaction capacity of iron-coke was greater than that of coke. As the iron-coke was preferentially gasified, the CRI of the coke was reduced and its CSR was increased when the iron-coke and the coke are co-gasified. The results show that the skeleton action of the coke can be protected by iron-coke.