| 摘要 |
PURPOSE:To enable blast furnace operation with fast responsiveness and a min. cost by controlling the kind and amt. of the powder to be blown through a blast furnace tuyere in such a way that the pig iron cost expressed by the equation including the cost index of the gas produced by the blast furnace attains a min. value. CONSTITUTION:The kind and amt. of the powder to be blown into a blast furnace through the tuyere thereof is so controlled that the pig iron cost (y) expressed by the equation y=x1+x2+x3+x4-x5 (in which, x1; the cost of the coke to be charged at the furnace top, yen/t-p, x2; the cost of the raw material to be charged at the furnace top, yen/t-p, x3; cost of blasting, yen/t-p, x4; the cost of the raw material and fuel to be blown through the tuyere, yen/t-p, x5; the cost of the gas produced in the blast furnace, yen/t-p in the stage of operating the blast furnace by blowing various kinds of powder such as pulverized coal, iron oxide powder, calcium carbonate powder or the like together with blasting gas into the blast furnace through the tuyere. The blowing of various kinds of the powder through the tuyere has the effect of decreasing the pig iron cost with fast responsiveness. The powder requiring blowing most is selected at this time and is controlled so as to attain the min. cost. |
