| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus and a method for charging raw material into a blast furnace with which "coke/ore" layer thickness ratio only in a limited range at a furnace center part is kept to be large and also, the coke grain diameter charged in the furnace center part can be made coarse. SOLUTION: The apparatus is installed at a furnace top part for charging the raw material into the blast furnace. The apparatus provided with: furnace top bunkers having discharging holes at a position eccentric to the center axis; a swinging chute for charging the raw material discharged from the furnace top bunkers; and a center coke exclusive chute for charging the coke into the area near the furnace axis, is used. It is preferable to provide≥3 sets of the furnace bunkers and a guide means for charging the raw material from the upper part of the discharging hole to the furnace top bunker. Further, as regards the grain diameter of the charging material charged into the blast furnace from the furnace top bunker, a large amount of fine grain is charged at the initial stage of the discharge and a large amount of coarse grain is charged at the latter stage of the discharge. COPYRIGHT: (C)2007,JPO&INPIT
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