公开(公告)号：EP1165844A1

公开(公告)日：2002-01-02

申请号：EP00983519.0

申请日：2000-12-07

申请人： POHANG IRON & STEEL CO., LTD. ,  RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY ,  VOEST-ALPINE INDUSTRIEANLAGENBAU GESELLSCHAFT m.b.H.

发明人： KIM, Hang-Goo ,  JEONG, Sun-Kwang ,  LEE, Il-Ock ,  CHOI, Nag-Joon

IPC分类号： C21B13/02

CPC分类号： C21B13/0033 ,  Y02P10/136

摘要： A fluidized bed reduction reactor has a plurality of fluidized bed reactors (10) with inner gas distributors (19). A charge duct (12) passes through the top of the fluidized bed reactor (10) with a free end to charge a fine iron ore into said reactor (10). The free end of the iron ore charging duct (12) is positioned close to the top center of the gas distributor (19). A spiral-shaped partition weir (13) is placed over the gas distributor and surrounds the iron ore charging duct (12) while being spirally extended to an inner wall of the fluidized bed reactor (10) where it is fixed. The fine iron ore is fluidized and reduced while spirally flowing from the center of the fluidized bed rector (10) to its inner wall. In this structure, the back mixture phenomenon where the reacted fine iron ore is mixed with the non-reacted fine iron ore does not occur.

公开(公告)号：EP1165844B1

公开(公告)日：2003-09-10

申请号：EP00983519.0

申请日：2000-12-07

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

发明人： KIM, Hang-Goo ,  JEONG, Sun-Kwang ,  LEE, Il-Ock ,  CHOI, Nag-Joon

IPC分类号： C21B13/02

CPC分类号： C21B13/0033 ,  Y02P10/136

摘要： A fluidized bed reduction reactor has a plurality of fluidized bed reactors (10) with inner gas distributors (19). A charge duct (12) passes through the top of the fluidized bed reactor (10) with a free end to charge a fine iron ore into said reactor (10). The free end of the iron ore charging duct (12) is positioned close to the top center of the gas distributor (19). A spiral-shaped partition weir (13) is placed over the gas distributor and surrounds the iron ore charging duct (12) while being spirally extended to an inner wall of the fluidized bed reactor (10) where it is fixed. The fine iron ore is fluidized and reduced while spirally flowing from the center of the fluidized bed rector (10) to its inner wall. In this structure, the back mixture phenomenon where the reacted fine iron ore is mixed with the non-reacted fine iron ore does not occur.

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.

公开(公告)号：EP1177322A2

公开(公告)日：2002-02-06

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 ,  VOEST-ALPINE Industrieanlagenbau GmbH

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 (40) or a fluidized bed reactor (10, 20, 30), into dusts and reducing gas to supply them to each fluidized bed reactor (10, 20, 30) respectively is disclosed, in which the smelting reduction apparatus includes a three-stage type fluidized bed reactor, a melter-gasifier (40) for manufacturing molten pig iron and a dust separating device (45, 50, 60), which performs separation of exhausted gas from the melter-gasifier (40) into dusts and reducing gas, so as to supply the separated reducing gas to a lower part of the final fluidized bed reactor (30), dusts having a larger particle size back to the melter-gasifier (40) again and fine dusts having a smaller particle size to an upper part of the gas distributor of the final fluidized bed reactor (30).