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    A DEVICE FOR PREVENTING BACK MIXTURE IN A FLUIDIZED BED REACTOR
    1.
    发明授权
    A DEVICE FOR PREVENTING BACK MIXTURE IN A FLUIDIZED BED REACTOR 有权
    设备技术逆流混合IN A FLUIDATBETTREAKTOR预防

    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.

    VERFAHREN ZUM HERSTELLEN VON FLÜSSIGEM ROHEISEN ODER FLÜSSIGEN STAHLVORPRODUKTEN
    2.
    发明授权
    VERFAHREN ZUM HERSTELLEN VON FLÜSSIGEM ROHEISEN ODER FLÜSSIGEN STAHLVORPRODUKTEN 失效
    法生产液态生铁或钢液前兆

    公开(公告)号：EP0914475B1

    公开(公告)日：2001-06-06

    申请号：EP97928042.7

    申请日：1997-06-26

    申请人： VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH ,  POHANG IRON & STEEL CO., LTD. ,  RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY, INCORPORATED FOUNDATION

    发明人： KEPPLINGER, Leopold, Werner ,  WALLNER, Felix ,  SCHENK, Johannes ,  LEE, Il-Ock ,  KIM, Yong-Ha ,  PARK, Moon, Duk

    IPC分类号： C21B13/14

    CPC分类号： C21B13/14 ,  Y02P10/136

    摘要： In a method of producing liquid pig iron (43) or liquid steel precursors from charges consisting of iron ore (5) and fluxes, having at least in part a proportion of fines, the iron ore is reduced directly to sponge iron in two or more reduction stages (1, 2) by the fluidized-bed method. The sponge iron is then melted in a smelting-gasification zone (39), with carbonaceous materials and oxygenous gas added; a reducing gas containing CO and H2 is generated, which is introduced into the reducing zones of the reduction stages (1, 2), reacts there, is drawn off as top gas, and supplied to a consumer, where appropriate. In order to achieve uniform reduction of the iron ore with optimum utilization of the reducing gas, in a first reduction stage (1), the iron ore (5) is fractionated into two or more fractions of different grain-size distributions, with the help of the reducing gas; each fraction is reduced with the reducing gas in its own fluidized bed (6, 15); the reducing gas sustaining a first fluidized bed (6), containing the coarse-grain fraction, and separating the fine-grain fraction from it, and additional reducing gas being introduced directly into the other fluidized bed (15); reduced iron ore (5) is withdrawn from both the first and the additional fluidized beds (6, 15), and the fine-grain and coarse-grain fractions reduced in the first reduction stage (1) are reduced further in one or more additional reduction stages (2), that operate in the same way as the first reduction stage (1); from the last reduction stage (2), the fine-grain fraction is fed into the smelting-gasification zone (39) under agglomeration by addition of oxygen, and the coarse-grain fraction is gravity-fed directly into the smelting-gasification zone (39).

    VERFAHREN ZUM HERSTELLEN VON FLÜSSIGEM ROHEISEN ODER FLÜSSIGEN STAHLVORPRODUKTEN
    4.
    发明公开
    VERFAHREN ZUM HERSTELLEN VON FLÜSSIGEM ROHEISEN ODER FLÜSSIGEN STAHLVORPRODUKTEN 失效
    法生产液态生铁或钢液前兆

    公开(公告)号：EP0914475A1

    公开(公告)日：1999-05-12

    申请号：EP97928042.0

    申请日：1997-06-26

    申请人： VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH ,  POHANG IRON & STEEL CO., LTD. ,  RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY, INCORPORATED FOUNDATION

    发明人： KEPPLINGER, Leopold, Werner ,  WALLNER, Felix ,  SCHENK, Johannes ,  LEE, Il-Ock ,  KIM, Yong-Ha ,  PARK, Moon, Duk

    IPC分类号： C21B13

    CPC分类号： C21B13/14 ,  Y02P10/136

    摘要： The invention relates to a method for producing liquid pig iron (43) or liquid steel precursors from a hardening material formed by iron ore (5) and additives and having at least partially fines. To achieve a uniform reduction of the iron ore with optimum utilization of the reducing gas, the iron ore (5) is fractionated into at least two fractions, each of them having different grain size distribution, during a first reduction stage (1) with the help of the reducing gas. Each fraction is then reduced with the reducing gas in its own fluidized bed, whereby the reducing gas maintains a first fluidized bed (6) containing the coarse grain fraction and separates the fine grain fraction from it. An additional reducing gas is later introduced directly into the other fluidized bed (15). The reduced iron ore (5) is withdrawn both from the first and from the other fluidized bed (6, 15). The fine and coarse grain fractions reduced during the first reduction stage (1) are further reduced in ore or more additional reduction stages (2) operating in the same way as the first reduction stage (1). The fine grain fraction obtained during the last reduction stage (2) is fed into the smelting-gasification zone (39) under agglomeration by adding oxygen. The coarse grain fraction is gravity fed directly into the smelting-gasification zone (39).