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