| 摘要 |
PURPOSE:To suitably control gas flow distribution to radius direction in a furnace by changing piling shape and porosity to the radius direction at the furnace top and to stabilize furnace condition, by changing area or shape of a dischanging hole of swinging chute for charging raw material in a two bell movable armor type blast furnace. CONSTITUTION:After storing once iron ore, coke and the other submaterials in a fixed hopper 1 arranged at the top of the blast furnace, they are stayed in a small bell hopper 4 through discharging valve 2 and swinging chute 3. The raw materials are dropped into a large bell hopper by opening/closing the small bell 5 through descending/ascending a lifting rod 6 and successively by opening the large bell, they are charged as dispersing on the furnace top part. In this case, by arranging changing mechanism 7 of area and shape in discharging hole of the swinging chute 3, dropping condition of charging raw material dropping from the swinging chute 3 is changed to change the piling shape and the porosity to the radius direction of the raw material on the small bell 5. And, by adjusting the piling shape and the cavity to the radius direction of the raw material on the furnace top stock line, ascending gas flow at the radius direction in the furnace is suitably controlled and the furnace condition of the blast furnace is stabilized. |
