公开(公告)号：EP1177322B1

公开(公告)日：2005-03-09

申请号：EP00986025.5

申请日：2000-12-20

申请人： POHANG IRON & STEEL CO., LTD ,  RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY

发明人： CHOI, Nag-Joon ,  JEONG, Sun-Kwang ,  KIM, Hang-Goo ,  KANG, Heung-Won ,  HAUZENBERGER, Franz, Voest-Alpine

IPC分类号： C21B3/00

CPC分类号： C21B13/002 ,  C21B13/0033 ,  C21B13/14 ,  C21B2100/44 ,  C22B5/14 ,  Y02P10/136 ,  Y02P10/216

摘要： A smelting reduction apparatus which separates exhaust gas, which is exhausted from a melter-gasifier or a fluidized bed reactor, into dusts and reducing gas to supply them to each fluidized bed reactor respectively is disclosed, in which the smelting reduction apparatus includes a three-stage type fluidized bed reactor, a melter-gasifier for manufacturing molten pig iron by finally reducing the fine iron ores of which reaction is finished in a final fluidized bed 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.