Temperature Dependence of Reduction Disintegration of Self-fluxing Pellet under High Hydrogen Condition of Blast Furnace

It has been reported that an increasing H2 gas ratio of the reducing gas in the blast furnace promotes the low temperature reduction disintegration of the iron ore pellet. Reduction of the pellet sample proceeds uniformly under higher H2 condition at 500°C. Microcracks with the size of several micrometer form at the primary particles of iron oxide and it promote fine particles formation after the drum test. Macrocracks with the size of several millimeter form inside of the pellet after reduction and it promotes the volumetric destruction. In this study, the temperature dependence of reduction disintegration of self-fluxing pellet under higher H2 condition was examined.