FLUIDIZED BED TYPE FINE IRON ORE REDUCING APPARATUS, AND METHOD THEREFOR

摘要

A fluidized bed type reducing apparatus for reducing a fine iron ore of a wide particle size distribution includes a first fluidized bed type furnace (210) for a first reduction of only coarse/intermediate iron ores and a second fluidized bed type furnace (220) for the reduction of the iron ores of the first fluidized bed type furnace (210). A first cyclone (240) captures fine iron ore particles from the discharge gas of the first fluidized bed type furnace (210) and a second cyclone (250) captures those from that of the second fluidized bed type furnace (220). In a third fluidized bed type furnace (230) the fine iron ore particles are reduced which have been captured by the first and second cyclones (240 and 250). A third cyclone (260) captures the extremely fine iron ore particles discharged from the third fluidized bed type furnace (230) to recycle them to the third fluidized bed type furnace (230).