To provide a method for operating a vertical furnace, with which a stable vertical furnace operation is made possible by raising rotating strength of coke for charging into the vertical furnace, such as a blast furnace, and suppressing powdering inside the furnace of the coke charged into the vertical furnace without increasing a cost caused by changing raw material coal for coke and without accompanying a complicated pretreatment to the produced coke.
The method for operating the vertical furnace is used, which includes: installing a vertical type coke filling-up tower 4 in a coke-conveying line from a coke furnace 1 to the vertical furnace 6; adjusting the charging amount and the discharging amount of the cokes so that the height of the coke layer in the coke filling-up tower 4 becomes a prescribed range or lower, when charging the coke from the upper part of the coke filling-up tower 4 and discharging the coke from the lower part thereof; imparting a dropping impact to the coke in the coke filling-up tower 4; and charging the coke after removing the powdery coke part produced by this dropping impact into the vertical furnace 6. It is preferable to use the coke filling-up tower 4 in which a dispersing plate is installed at the dropping position of the coke.
YAMAMOTO TETSUYA
FUKUMOTO CHIEKO
Kazuhiro Mori