| 摘要 |
PROBLEM TO BE SOLVED: To provide a charging method of charging material into the center part of a blast furnace for executing the smooth blast furnace operation, by which a stable fused zone is formed even for the variation of furnace conditions according to the quality and the production amount of a pig iron produced by the blast furnace. SOLUTION: When the charging material is charged into the bell-less blast furnace, and the finish coke is charged on the preceding charged coke through a swing chute after setting the inclining angle of the swing chute in the range of 20-35 deg., the finish coke is charged and piled at a prescribed position in the radial direction of the furnace opening part of the blast furnace, and successively, iron ore is charged between the outside of the charged and piled coke and the furnace wall of the blast furnace through the swing chute. As the other way, after charging the coke into the lower part of a furnace top hopper just above the blast furnace, successively, the iron one is charged on the upper part thereof, and after storing the coke and the iron ore in the furnace top hopper layer by layer, the inclining angle of the swing chute is set at a specific angle in the range of 20-35 deg.. Thereafter, a cutoff valve is opened and a large quantity of the coke stored at the lower part is charged and piled onto the above position, and successively, the swing chute is shifted to the outside of the charged and piled coke to start the charge of the iron ore stored at the upper part.
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