| 摘要 |
PURPOSE:To enable measuring of dropping curve of raw material into a furnace from a large bell with high accuracy and to improve the furnace operation result by controlling distribution of the raw material in the furnace, by detecting shocking force to an armor plate by the dropped raw material from the large bell in a bell type raw material charging apparatus in the blast furnace. CONSTITUTION:When the raw material 9 in the large bell drops in the blast furnace by descending the large bell 2 of the bell type raw material charging apparatus in the blast furnace, after the raw material collides with the armor plate 11 of a movable armor 1 hung from a hanging tool 12 fitted at an iron shell 19, the raw material layer 8 is formed in the furnace. In this case, an external force at the time, when the raw material collides wit the armor plate 11, gives a shaft 15 through a pushing rod 13 and a lever 14 supporting the movable armor 1 the torsional deformation. This deformation quantity is detected by a detector and then the position, where the raw material collides to the armor plate 11, is detected, and by shifting a driving ring 16, the pushing rod 13 is shifted through the lever 14, to control angle of the armor plate 11, and by suitably controlling the distribution of the raw material in the blast furnace, the furnace condition of the blast furnace is stabilized.
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