| 摘要 |
PURPOSE: A method for charging fuel and raw material through controlling of charging material discharge trace is provided in which first charging of fuel coke is not performed by a separate charging order, and length of trace is adjusted according to discharge control of ordinary coke to reduce air permeability resistance against gas flow of the central part of blast furnace. CONSTITUTION: In a blast furnace charging method for sequentially charging coke, large sized iron ore, small sized iron ore, coke, large sized iron ore, central coke and small sized iron ore into blast furnace(30), the method for charging fuel and raw material through controlling of charging material discharge trace is characterized in that air permeability resistance obstacle for uniformed flow of furnace gas is solved by sequentially and continuously charging only coke and large sized ore into the blast furnace so that ore having a large grain diameter is guided to the central part of the blast furnace, wherein a process of discharging the coke comprises first step of adjusting opening ratio of gate of coke weighing hopper(12) to 25 to 30%; second step of loading coke in the first step on a charging material transport conveyor belt(10b) so that the number of charging material tracking traces(40) is adjusted to the range of 30 to 32; third step of sequentially storing coke into one hopper from charging material bin(20) in the trace range of the second step; fourth step of fixing opening ratio of gate to 35 to 40% to control trace according to discharge quantity of the fuel when discharging fuel from the weighing hopper in the third step; and fifth step of loading coke in the fourth step on the charging material transport conveyor belt so that the number of charging material tracking traces is adjusted to the range of 24 to 26.
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