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    METHOD FOR OPERATING A BLAST FURNACE INSTALLATION
    3.
    发明公开
    METHOD FOR OPERATING A BLAST FURNACE INSTALLATION 审中-公开

    公开(公告)号：US20230340628A1

    公开(公告)日：2023-10-26

    申请号：US18024644

    申请日：2021-09-09

    Applicant: PAUL WURTH S.A.

    Inventor： Cristiano CASTAGNOLA ,  Lorenzo MICHELETTI ,  Klaus Peter KINZEL ,  Miriam VALERIUS

    IPC: C21B5/06 ,  C21B7/00

    CPC classification number: C21B5/06 ,  C21B7/002 ,  C21B2100/26 ,  C21B2100/22

    Abstract: A method for operating a blast furnace for producing of pig iron, includes the following steps



    heating a first stream of steam in a first heater, before or after having been mixed with an oxygen source selected from oxygen and oxygen-enriched air, to provide a first heated stream of oxygen-enriched steam;
    heating a first stream of blast furnace gas from the blast furnace and a first stream of natural gas in a second heater, before or after being mixed together, to provide a heated carbon feed stream;
    feeding the first heated stream of oxygen-enriched steam and the heated carbon feed stream either as a combined stream or separately to a catalytic partial oxidation reactor to produce a stream of syngas; and
    feeding the stream of syngas to the shaft of the blast furnace.

    Method and device for operating a smelting reduction process
    4.
    发明授权
    Method and device for operating a smelting reduction process 有权
    冶炼还原工艺的运行方法和装置

    公开(公告)号：US09574247B2

    公开(公告)日：2017-02-21

    申请号：US14465375

    申请日：2014-08-21

    Applicant: SIEMENS VAI METALS TECHNOLOGIES GMBH

    Inventor： Robert Millner ,  Johannes Leopold Schenk ,  Kurt Wieder

    IPC: C21B5/00 ,  C21B5/06 ,  C21B7/00 ,  C21B13/00 ,  F02C6/00 ,  F27B1/26 ,  F27D17/00

    CPC classification number: C21B5/06 ,  C21B7/002 ,  C21B13/00 ,  C21B2100/02 ,  C21B2100/06 ,  C21B2100/282 ,  C21B2100/62 ,  F02C6/00 ,  F27B1/26 ,  F27D17/001 ,  Y02P10/122 ,  Y02P10/126 ,  Y02P10/128 ,  Y02P10/265 ,  Y02P10/283

    Abstract: In a method and a device for operating a smelting reduction process, at least part of an export gas from a blast furnace or a reduction unit is thermally utilized in a gas turbine and the exhaust gas of this gas turbine is used in a waste heat steam generator to generate steam. The remaining part of the export gas is fed to a CO2 separation apparatus, the tail gas thereby obtained being fed to a waste heat steam generator and burned for additional steam generation. The combustible components of the tail gas are sent for thermal utilization in a steam generator, so that the overall energy balance of the thermal use of the export gas is improved. In addition, a further part of the export gas is qualitatively improved by the CO2 separation apparatus, so as to generate a high-quality reduction gas which can be supplied for metallurgical use.

    Abstract translation: 在用于操作冶炼还原过程的方法和装置中，来自高炉或还原单元的输出气体的至少一部分在燃气轮机中热利用，并且该燃气轮机的废气用于废热蒸汽 发电机产生蒸汽。 将出口气体的剩余部分供给到CO 2分离装置中，由此获得的尾气被供给到废热蒸汽发生器，并被燃烧用于另外的蒸汽产生。 尾气中的可燃组分被送到蒸汽发生器中进行热利用，从而提高出口气体热利用的总能量平衡。 此外，通过二氧化碳分离装置对出口气体的另一部分进行定性改善，从而产生可用于冶金用途的高品质还原气体。

    METHOD AND SYSTEM FOR OPERATING A BLAST FURNACE WITH TOP-GAS RECYCLE AND A FIRED TUBULAR HEATER
    7.
    发明申请
    METHOD AND SYSTEM FOR OPERATING A BLAST FURNACE WITH TOP-GAS RECYCLE AND A FIRED TUBULAR HEATER 有权
    使用顶部气体回收和燃烧式管状加热器操作火焰炉的方法和系统

    公开(公告)号：US20150135900A1

    公开(公告)日：2015-05-21

    申请号：US14412071

    申请日：2013-07-03

    Applicant: HYL TECHNOLOGIES, S.A. DE C.V.

    Inventor： Jose Juan Martinez-Contreras

    IPC: C21B5/06 ,  C21B7/22 ,  F27D17/00 ,  C21B7/00

    CPC classification number: C21B5/06 ,  C10K1/005 ,  C10K1/02 ,  C10K1/04 ,  C21B7/002 ,  C21B7/22 ,  C21B2100/282 ,  C21B2100/44 ,  C21B2100/64 ,  C21D1/34 ,  C21D1/52 ,  F27B1/22 ,  F27B1/24 ,  F27D17/002 ,  F27D17/004 ,  F27D17/008 ,  F27D2017/006 ,  Y02P10/122 ,  Y02P10/126 ,  Y02P10/212 ,  Y02P10/283

    Abstract: A blast furnace system is used wherein the coke rate is decreased by recycling upgraded top gas from the furnace back into its shaft section (which upgraded top gas is heated in a tubular heater prior to being recycled). The top gas, comprising CO, CO2 and H2, is withdrawn from the upper part of the blast furnace; cooled and cleaned of dust, water, and CO2 for increasing its reduction potential and is heated to a temperature above 850° C. before being recycled thus defining a first gas flow path used during normal operation of the blast furnace. Uniquely, a second gas flow path for continued circulation of top gas selectively through the heater and a cooler during operation interruptions of the blast furnace allows time for gradual controlled cool down of the heater in a manner to avoid heat-shock damage to the tubular heater.

    Abstract translation: 使用高炉系统，其中通过将升级的顶部气体从炉返回到其轴部分（其中升级的顶部气体在再循环之前在管式加热器中被加热）来降低焦炭速率。 包括CO，CO 2和H 2的顶部气​​体从高炉的上部排出; 冷却并清洁灰尘，水和CO2，以增加其还原电位，并在再循环之前加热至高于850℃的温度，从而限定在高炉正常运行期间使用的第一气体流路。 独特地，用于在高炉的操作中断期间，顶部气体选择性地通过加热器和冷却器继续循环的第二气体流动路径允许加热器逐渐受控冷却的时间，以避免对管状加热器的热冲击损坏 。

    Blast furnace top gas recycling process and corresponding recycling equipment
    8.
    发明授权
    Blast furnace top gas recycling process and corresponding recycling equipment 有权
    高炉煤气回收利用过程及相应的回收设备

    公开(公告)号：US08992664B2

    公开(公告)日：2015-03-31

    申请号：US13257146

    申请日：2009-03-17

    Applicant: Fernand Didelon ,  Yves Rachenne ,  Christian Gillion ,  Jean Borlee ,  Dominique Sert

    Inventor： Fernand Didelon ,  Yves Rachenne ,  Christian Gillion ,  Jean Borlee ,  Dominique Sert

    IPC: F23N5/02 ,  C21B5/06 ,  C21B5/00 ,  C21B7/00 ,  C21B9/00

    CPC classification number: C21B5/06 ,  C21B5/001 ,  C21B7/002 ,  C21B9/00 ,  C21B2100/282 ,  C21B2100/64 ,  Y02E20/328 ,  Y02P10/122 ,  Y02P10/126 ,  Y02P10/128 ,  Y02P10/132 ,  Y02P10/265 ,  Y02P10/283 ,  Y02P10/34

    Abstract: A process for recycling blast furnace gas is provided. At least one portion of the gases resulting from the blast furnace undergo a CO2 purification step to create a CO-rich gas which is reinjected at a first top injection point at a temperature between 700° C. and 1000° C. through a top injection line, and at a second bottom injection point at a temperature between 1000° C. and 1300° C. through a bottom injection line. The gases from the bottom and top injection lines are heated at a temperature between 1000° C. and 1300° C. A portion of the CO-rich gas exiting the purification step is directly introduced into the top injection line via a cold gas injection line to obtain a temperature between 700° C. and 1000° C. at the first top injection point. The gas that flows through the bottom and top injection points controlled upstream of the system of the heaters. A device is also provided.

    Abstract translation: 提供了回收高炉煤气的方法。 由高炉产生的气体的至少一部分进行CO 2净化步骤以产生富CO的气体，其通过顶部注射在700℃和1000℃之间的温度在第一顶部注射点被再注入 并且在第二底部注射点处于1000℃和1300℃之间的温度下，通过底部注入管线。 来自底部和顶部注入管线的气体在1000℃和1300℃之间的温度下被加热。离开净化步骤的一部分富含CO的气体通过冷气体注入管线直接引入顶部注入管线 以在第一顶部注射点处获得在700℃和1000℃之间的温度。 流经底部和顶部注射点的气体控制在加热器系统的上游。 还提供了一种设备。

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