PURPOSE: To prevent the operation of bridging phenomena, etc. and to supply smoothly coal, etc. into a combustion chamber in a cylindrical furnace body having roughly the same diameter by making common use of a tuyere for blowing oxygen and steam as a supply port for coke and coal.
CONSTITUTION: Coal 29, etc. are supplied through the tuyeres 21 in a furnace to form a combustion zone (a). Coke 25, etc. are charged through a charging port 22 in the upper part of the furnace body to form a heating part (b). Reduced iron 26 is likewise charged through the port 22 to form a melting part (c). The oxygen, 27, steam 28, etc. blown through the tuyeres 21 and the coal 20, etc. are brought into reaction in the zone (a) and the slag thermally decomposed and melted by the combustion gas consisting essentially of CO and H2 and the limestone, etc. blown through the tuyeres 21 is formed. The combustion gas passes through the heating part (b) and melts the reduced iron 26 in the melting part (c), whereafter the gas is recovered through a discharging port 23. The slag is melted in the part (c) and is recovered together with the molten iron 26 dropping down in the part (b) in a well (d) and is removed through a gap and cinder notch 24.
MIYAZAKI TOMIO
SHIMODA TERUHISA
OKI KOUJI
YAMAOKA HIDEYUKI
