Correlation Between Pellet Reduction and Some Blast Furnace Operation Parameters

Modern blast furnace ironmaking aims at lowering consumption of reduction agents. Coke consumption is decreased while the amount of injected pulverized coal is increased. As the ore-to-coke ratio increases, so does load on the charged materials. An increased pulverized coal injection (PCI) will among other things affect the composition of the ascending reduction gases, the in-furnace temperature isotherms and possibly the position of the cohesive zone; all parameters important for the reduction of iron oxides. The loss of pellet strength depends on the reduction gas composition.