| 摘要 |
PURPOSE:To economize energy consumption by charging reduced iron into a pallet type half-carbonizing furnace, bringing the same into contact with coke raw material to half-carbonized coke, and charging the half-carbonized coke into a melting and gasifying furnace having a tuyere and a charge port for solid fuel. CONSTITUTION:Oxygen 9, pulverized coal 10, steam 11 and limestone powder 13a are blown through a tuyere 4 into a melting and gasifying furnace 1, and coke 16, coal 17, limestone 18 and steam 11 are blown therein through a charge port 15 of solid fuel, where the fuel is converted to combustion gas by oxygen 9, and the high temp. gas consisting essentially of CO and H2 is formed. The gas is allowed to rise in a coke-packed layer (b) to melt the reduced iron (a) in the upper part thereof and the reduced iron is dropped as pig iron (C); at the same time, reducing gas 12 through a gas removal port 3 is fed to a shaft furnace 20 to reduce the iron ore in the furnace to reduced iron 7. The reduced iron 7 is fed into a pallet type half-carbonizing furnace 30, where the reduced iron is brought into contact with the coke in the furnace to form half-carbonized coke 8. The reduced iron 7 and the coke 8 are charged through a charge port 2 into the furnace 1. |
