SMELTING REDUCTION APPARATUS AND METHOD OF OPERATING THE SAME

摘要

Smelting reduction apparatus for manufacturing a molten metal under the slag by adding a raw metal material, charcoal and a medium solvent to a furnace body having a rectangular horizontal section, and blowing oxygen and/or an oxygen enriched gas from a lower tuyere in the side wall of the furnace body into the slag and a method of operating the same are improved. An inert gas is blown through a botton tuyere provided in the vicinity of the center in the direction of shorter sides of a furnace bottom into the molten metal so as to secure a slag stirring operation in the vicinity of the center in the direction of the short sides. An inert gas is blown through a lowermost tuyere, which is provided in the side wall of the furnace body which is between a position lower than the lower tuyere and the interface between the slag and a molten metal so that the lowermost tuyere inclines at 0 DEG -45 DEG downward with respect to the horizontal plane, so as to stir the slag on the immediately upper side of the molten metal, increase the relative speed of the slag and molten metal and also increase the amount of heat transferred from the slag to the molten metal. The lower tuyere is provided laterally and perpendicularly to the long sides of the furnace body so as to incline at 15 DEG -45 DEG in the opposite direction of a raw material input port, so as to cause the slag to flow also in the direction of the long sides of the furnace body.