8th International Congress on Science and Technology of Ironmaking - ICSTI 2018

Blast furnace productivity is limited by the resistance offered to the gas flow in the cohesive zone. Mixed use of nut coke with iron ore proved beneficial for decreasing this resistance. In present study effect of nut coke addition on the olivine iron ore pellet bed was studied under simulated blast furnace condition. Nut coke mixing degree (replacement of regular coke) varied from 0 to 40 wt% to study the physicochemical changes that it brings on pellet bed. The difference between the softening and melting temperature decreases with the nut coke addition. The softening temperature increases due to increase in reduction degree of the pellets. The melting temperature decreases due to the higher carbonisation degree of iron shell. During melting, the magnitude of the pressure drop peak decreases with the increase in nut coke concentration