Reduction Behavior in Cohesive Layer of Blast Furnace

Abstract

Behavior of gas flow, heat transfer and reduction of iron ore in a cohesive layer is investigated by the non-steady mathematical model and experiments.
It was found that
1) reduction of iron ore in a cohesive layer is affected by the gas flow resistance through the cohesive layer,
2) with the increase of the gas flow resistance through the cohesive layer, rate controlling step of heat transfer and reduction in a cohesive layer is switched over from the convection to the diffusion,
3) the reduction of iron ore in a cohesive layer proceeded from the surface to the center of the cohesive layer.