Dynamic dissolution of CO 2 /H 2 O(g)-gasified coke by slag containing FeO

In top gas recycling-oxygen blast furnace (TGR-BF) and injection coke oven gas-blast furnace (COG-BF), lower coke ratio highlight the importance of coke in the melting and dropping zone. To understand the deterioration of coke in lower blast furnace, the dynamic dissolution of CO₂/H₂O-gasified coke by slag containing FeO and reaction kinetics were analysed. The results showed that the coke deterioration was more serious in CO₂ than in H₂O for the same gasification ratio. To understand the internal variation of coke, pore distribution and microstructure of coke were observed using mercury porosimeter and scanning electron microscope (SEM). For the same gasification ratio, pore structure was more uniform in H₂O than in CO₂. In addition, the kinetics of coke's reaction with FeO in slag was analysed.