| 摘要 |
PURPOSE:To improve the efficiency of blast furnace operation by controlling the ratio of permeable resistances of iron ore and coke to the specific range at the time of supplying alternately the ore and the coke as layer-state. CONSTITUTION:The ore and coke are alternately supplied in the blast furnace as the layer-state. Then, the ratio of the permeable resistance of the iron ore charged in the furnace wall side of the blast furnace and the permeable resistance of the coke layer charged in the upper face and the lower face of the iron ore layer, is controlled so as to become the range of 10-45. For example, charging of the iron ore classified into grain sizes, etc., is executed. By this method, inactive zone in the blast furnace can be controlled and the utilizing efficiency in the blast furnace can be improved. |
