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    TWO STEP TWIN-SINGLE FLUIDIZED BED TYPE PRE-REDUCTION APPARATUS FOR PRE-REDUCING FINE IRON ORE, AND METHOD THEREFOR
    114.
    发明公开
    TWO STEP TWIN-SINGLE FLUIDIZED BED TYPE PRE-REDUCTION APPARATUS FOR PRE-REDUCING FINE IRON ORE, AND METHOD THEREFOR 审中-公开
    用于预还原细铁矿的两步双单流化床型预还原装置及其方法

    公开(公告)号：EP0968311A1

    公开(公告)日：2000-01-05

    申请号：EP98959282.9

    申请日：1998-12-16

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

    发明人： CHOI, Nag Joon,Res. Inst. of Ind. Science & Tech. ,  JEONG, Sun KwangRes. Inst. of Ind. Science & Tech ,  JUNG, Uoo ChangRes. Inst. of Ind. Science & Tech. ,  KANG, Heung WonRes. Inst. of Ind. Science & Tech.

    IPC分类号： C21B13/14

    CPC分类号： C21B13/0033 ,  Y02P10/136

    摘要： A two step twin-single fluidized bed type reduction apparatus for fine iron ore, and a method therefor, are disclosed. The fluidizing of the fine iron ore is stabilized so as to improve the reduction degree and the gas utilization rate, and so as to minimize the elutriation loss of the iron ore. The apparatus includes a first fluidized bed furnace (110) for carrying out a first pre-reduction on only coarse/intermediate iron ore particles among fine iron ores of a wide particle size distribution by a bubbling/turbulent fluidization after their charge from a charging hopper (100), while making fine iron ore particles fly away. A second fluidized bed furnace (120) carries out a first pre-reduction on the fine iron ore particles flown from the first fluidized bed furnace (110) by a bubbling fluidization, and a third fluidized bed furnace (130) carries out a second pre-reduction on the iron ores discharged from the first (110) and second (120) fluidized bed furnaces after their first pre-reduction. A first cyclone (124) captures extremely fine iron ore particles from an off-gas discharged from the second fluidized bed furnace (120) to circulate them back to the second fluidized bed furnace (120). A second cyclone (134) captures extremely fine iron ore particles from an off-gas discharged from the third fluidized bed furnace (130) to circulate them back to the third fluidized bed furnace (130). A gas reforming system (140) reforms a part of the off-gas of the first cyclone (124) to circulate the reformed gas to the first (110) and second (120) fluidized bed furnaces.

    摘要翻译： 公开了用于粉铁矿的两步双单流化床型还原设备及其方法。 粉铁矿的流化稳定以提高还原程度和气体利用率，并且使铁矿石的淘析损失最小化。 该设备包括：第一流化床炉（110），用于在它们从装料斗装料之后通过鼓泡/湍流流化在仅宽大粒度分布的细铁矿石中的粗/中铁矿石颗粒上进行第一预还原 （100），同时使细铁矿颗粒飞走。 第二流化床炉（120）通过鼓泡流化对从第一流化床炉（110）流出的粉铁矿颗粒进行第一预还原，第三流化床炉（130）进行第二预处理 - 在第一次预还原之后还原从第一（110）和第二（120）流化床炉排出的铁矿石。 第一旋风分离器（124）从从第二流化床炉（120）排出的废气中捕获极细的铁矿石颗粒以将其循环回到第二流化床炉（120）。 第二旋风分离器（134）从从第三流化床炉（130）排出的废气中捕集极细的铁矿石颗粒以使其循环回到第三流化床炉（130）。 气体重整系统（140）重整第一旋风器（124）的一部分废气以使重整气体循环到第一（110）和第二（120）流化床炉。

    VERFAHREN ZUM HERSTELLEN VON FLÜSSIGEM ROHEISEN ODER FLÜSSIGEN STAHLVORPRODUKTEN
    116.
    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).

    VERFAHREN ZUR HERSTELLUNG VON FLÜSSIGEM ROHEISEN ODER STAHLVORPRODUKTEN AUS EISENHÄLTIGEM MATERIAL
    118.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON FLÜSSIGEM ROHEISEN ODER STAHLVORPRODUKTEN AUS EISENHÄLTIGEM MATERIAL 失效
    用于生产液态生铁或钢前兆FROM含铁材料

    公开(公告)号：EP0882142A1

    公开(公告)日：1998-12-09

    申请号：EP97911045.0

    申请日：1997-11-05

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

    发明人： NAGL, Michael ,  SCHENK, Johannes-Leopold ,  KEPPLINGER, Leopold, Werner

    IPC分类号： C21B11 ,  C21B13

    CPC分类号： C21B13/14 ,  C21B13/002 ,  C21B2100/44

    摘要： In a process for producing liquid pig iron (9) or semifinished steel products from finely divided iron-containing materials (4) in a melting gasifier (1), the iron-containing materials (4) are molten in a bed of solid carbon-containing materials (2) to which carbon-containing materials (2) and oxygen-containing gas are supplied, at the same time as a reduction gas is generated. The finely divided reduced materials (4) and the oxygen are laterally introduced into the bed (20, 21). To enable the finely divided iron-containing materials to be introduced into the melting gasifier (1) without being previously briquetted and thus to prevent the finely divided iron-containing materials (4) from being discharged by the reduction gas generated in the melting gasifier (1), a fluidised bed (21) of finely divided solid carbon-containing materials (2) and finely divided iron-containing reduced materials (4) is created above a solid bed (20) of solid carbon-containing materials (2). The finely divided reduced materials (4) are brought directly into contact with oxygen in the fluidised bed (21), preferably in the form of a jet having a ring-shaped cross-section which surrounds the periphery of a jet of oxygen, so that the oxygen is surrounded by the supply of finely divided reduced materials (4), which are then molten in the fluidised bed.