METHOD FOR ADJUSTING DISTRIBUTION OF GASEOUS FLOW IN BLAST FURNACE IN STAGE OF CHANGING OPERATION

PURPOSE:To adjust the distribution of the gaseous flow in a blast furnace exactly and quickly and to stabilize the operation of the blast furnace by determining the layer thickness ratio of a furnace wall part after the change of an operation from the flow rate of the air passing in the furnace and a heat flow ratio in the stage of said changing and controlling a charge distribution so as to attain said ratio. CONSTITUTION:The layer thickness ratio of the furnace wall part after the change of the operation of the blast furnace is determined from the predetermined relation among the flow rate of the air passing in the furnace, the heat flow ratio and the layer thickness layer of the furnace wall part in the stage of changing said operation. The predicted value of the layer thickness ratio of the furnace wall part which is the index for the target gaseous distribution ratio is determined as the target and the distribution of the charge such as coke and ore is controlled in such a manner that the above-mentioned layer thickness ratio of the furnace wall part is obtd. The exact and quick adjustment of the distribution of the gaseous flow in the stage of changing the operation is thus made possible and the stable blast furnace operation is executed.