| 摘要 |
PURPOSE: A top bunker of blast furnace with multistage charging function is provided to stabilize circumstances of the blast furnace and improve productivity by dividing the bunker into upper and lower bunkers, thereby maintaining level of the furnace to the appropriate state even when raw materials and fuel are not charged for a certain time. CONSTITUTION: In a bunker which is installed at left and right sides on the top of a blast furnace to temporarily store fuel and raw materials, the top bunker of the blast furnace with multistage charging function comprises an upper bunker(12) at the upper part of which an upper seal valve(120) is installed, and the lower part of which is opened or closed by a valve(18) operated by a cylinder(19); a lower bunker(14) which is extended to the lower part of the upper bunker(12), and at the blast furnace(100) of the lower part of which a lower seal valve(120) is installed; and a bypass pipe(26) which is equipped with a bypass valve(24) and connects the upper bunker(12) to the lower bunker(14), wherein the bypass pipe(26) is connected to pipes for supplying blast furnace gas and nitrogen gas to the upper bunker(12) for the bypass valve(24), and the bypass pipe(26) is connected to pipes for exhausting back pressure to the side of the lower bunker(14).
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