METHOD OF SMELTING REDUCTION OF ORES CONTAINING METAL OXIDES

摘要

Metal oxide ore is subjected to smelting reduction to obtain the molten metal by a method which comprises prereducing said ore in solid state in a prereduction furnace, thereafter melting said ore and carrying out final reduction thereof in a smelting reduction furnace, and at the same time introducing gas generated in said smelting reduction furnace and having reductive capability into said prereduction furnace, the rate of prereducing said ore in said prereduction furnace being controlled at a value with a maximum of the order of 33 percent for raising the rate of utilization of energy to a maximum limit.