Method for direct reduction ironmaking, and apparatus for production of reducing gas therefor
    2.
    发明专利
    Method for direct reduction ironmaking, and apparatus for production of reducing gas therefor 审中-公开
    直接还原铁的方法及其生产降低气体的装置

    公开(公告)号:JP2012007213A

    公开(公告)日:2012-01-12

    申请号:JP2010144724

    申请日:2010-06-25

    Abstract: PROBLEM TO BE SOLVED: To provide a method for direct reduction ironmaking capable of collecting and utilizing most of waste heat generated in a natural gas reformer in a reforming process and of achieving excellent energy efficiency, and to provide an apparatus for production of a reducing gas therefor.SOLUTION: Reforming of a natural gas is performed by charging the natural gas 1, steam 2 and oxygen 6 in a reformer 50 to burn partially. The obtained reducing gas containing hydrogen and carbon monoxide is supplied to a shaft furnace 30 through a line 56, and an iron ore 7 is reduced in the shaft furnace 30 to produce a direct reduction iron 8. The waste gas generated in the shaft furnace 30 is introduced into a carbon dioxide-removing device 40, and after removal of carbon dioxide, the waste gas is reutilized as the reducing gas in the shaft furnace 30 through a waste gas-reutilizing line 49.

    Abstract translation: 要解决的问题:提供一种直接还原炼铁的方法,其能够收集和利用重整过程中天然气重整器中产生的大部分废热并实现优异的能量效率,并且提供一种用于生产 一种还原气体。 解决方案:天然气的重整是通过在重整器50中装入天然气1,蒸汽2和氧气6进行部分燃烧。 得到的含有氢和一氧化碳的还原气体通过管线56供给立式炉30,在竖炉30中还原铁矿石7,生成直接还原铁8.在竖炉30中产生的废气 被引入二氧化碳去除装置40中,并且在除去二氧化碳之后,废气通过废气再循环管线49作为竖炉30中的还原气体再利用。版权所有(C)2012 ,JPO&INPIT

    Production of reduced iron and its device
    4.
    发明专利
    Production of reduced iron and its device 失效
    减少铁的生产及其设备

    公开(公告)号:JPS57123910A

    公开(公告)日:1982-08-02

    申请号:JP898981

    申请日:1981-01-26

    CPC classification number: C21B13/02 C21B2100/22 C21B2100/60 C21B2100/64

    Abstract: PURPOSE:To facilitate the separation of a reducing furnace and a reducing gas producer and to perform the direct reduction operation of iron ore stably in a direct reducing device for iron ore by providing a high temp. shut-off valve between the reducing gas producer and the reducing furnace. CONSTITUTION:A mixture of hydrocarbon and steam or CO2 is fed into a steam reformer 1 as a reducing gas reforming furnace, and is fed as a reducing gaseous mixture of H2 and CO to a reducing furnace 2, by which iron ore is subjected to solid phase reduction. In this case, a high temp. shut-off valve 20 is installed to a line 6 connecting the reformer 1 and the furnace 2, and a gas cooler 21 is provided to a branch line 23. To interrupt the operation of the furnace 2 temporarily on generation of abnormality in the part associating to the furnace 2, the valve 20 is closed, and the high temp. reducing gas from the reformer 1 is flowed to a cooler 21 where it is cooled, then it is released. Since the operation of the reformer 1 can be continued without interruption, it responds immediately when the operation of the furnace 2 is resumed.

    Abstract translation: 目的:为了便于还原炉和还原气体生产商的分离,并通过提供高温直接还原铁矿石直接还原装置来稳定地直接还原铁矿石。 关闭阀在还原气体生产者和还原炉之间。 构成:将烃和蒸汽或二氧化碳的混合物作为还原气体重整炉供给到蒸汽重整器1中,并且作为还原气体混合物H 2和CO进料到还原炉2中,通过该还原炉2将铁矿石固体 相位降低。 在这种情况下,高温 截止阀20安装在连接重整器1和炉子2的管线6上,并且气体冷却器21设置在分支管线23上。为了在产生部件关联的异常时暂时停止炉子2的操作 到炉2,阀20关闭,高温 来自重整器1的还原气体流入冷却器21,冷却器21被释放。 由于重整器1的操作可以不间断地继续进行,所以当炉2的操作恢复时立即响应。

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