Fluidized bed reactor for preventing the fine iron ore from sticking therein and method thereof

A smelting reduction apparatus for preventing sticking of charged fine iron ores in fluidized bed reactors, comprising:

• a three-stage type fluidized bed reactors including;
• a) an ore charging duct mounted on a side of respective fluidized bed reactors for charging fine iron ores,
• b) a gas supply duct mounted at a lower part of the respective fluidized bed reactors for supplying reducing gas,
• c) an ore discharge duct mounted on a side wall of the respective fluidized bed reactors for discharging fine iron ores which are charged into the respective fluidized bed reactors and reactions thereof are finished,
• d) a gas distributor mounted in the respective fluidized bed reactors for uniformly distributing the reducing gas to the inner space of the respective fluidized bed reactors, and
• e) a cyclone for separating fine iron ore particles from the exhausted gas, which is discharged from the upper parts of the respective fluidized bed reactors, to supply the reducing gas to next reactor or release outside and recycle the fine iron ore particles to the lower parts of the respective fluidized bed reactors;
• a melter-gasifier for manufacturing molten pig iron by finally reducing the fine iron ores of which reaction is finished in a final fluidized reactor;
• and
• a dust separating device, which performs separation of exhausted gas from the melter-gasifier into dusts and reducing gas, so as to supply the separated reducing gas to a lower part of the final fluidized bed reactor, dusts having a larger particle sizes in the separated dusts to the melter-gasifier again, and fine dusts having a smaller particle sizes in the separated dusts to an upper part of a gas distributor of the final fluidized bed reactor.