Inner Profile and Burden Descent Behavior in the Blast Furnace

The blast furnace inner wall profile exerts a large influence on not only the descent velocity distribution of the burden but also the layer structure of the burden and the gas flow. Then, it was clarified that the furnace wall brick erosion and the scaffolding made the solid flow and the gas flow unstable in the upper part of the shaft and the furnace wall erosion changed the shape of cohesive zone greatly in the lower part of the furnace based on the finding of the three-dimensional half-section blast furnace model experiment of 1/10-1/20 reduced scales concerning the optimization of the blast furnace inner wall profile seen from the viewpoint of the stabilization of the solid flow and the gas flow. The problem of the lower part profile of the large-scale actual blast furnace was discussed at the end.