| 摘要 |
PROBLEM TO BE SOLVED: To improve utility value of blast furnace gas as a heat source while attempting reduction of reduction material ratio.SOLUTION: Blast furnace operation is carried out by charging coke and ore in a blast furnace. As a part of the coke, high reactive coke that a coke reactivity index CRI as an indicator of reactivity of the coke is not less than 65% is used. An average value of a reducibility index RI as an indicator of reducibility of iron oxide of the ore is 50% or more and 65% or less.SELECTED DRAWING: None |
