METHOD FOR SUPPLYING RAW MATERIAL IN SMELTING REDUCTION

摘要

PURPOSE:To supply powdery raw material into a furnace at high solid/gas ratio and good yield and to maintain reducing reaction velocity to high by blowing the powdery raw material toward slag surface together with carrier gas at the prescribed inclined angle. CONSTITUTION:A powdery raw material supplying device 7 is fitted to a furnace wall opening part 11 arranging to the furnace wall 10 in a smelling reduction furnace 1 and the powdery raw material is blown into the furnace together with the carrier gas. The blowing of the powdery raw material is executed so as to have the prescribed inclined angle to the stationary slag surface L. Blowing velocity at tip injecting hole 7a decided by the solid/gas ratio, supplying velocity and cross sectional area of the injecting hole 7a set with conveying characteristic of the powdery raw material. Height of the furnace wall opening part 11 and the blowing inclined angle are set so that the powdery raw material is blown toward the stationary slag surface L at the prescribed blowing angle from the furnace wall opening part 11. As the opening part 11 is positioned at the upper part from the molten slag, the stable furnace operation can be executed.