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    Direct reduction process for producing metallic iron
    1.
    发明授权
    Direct reduction process for producing metallic iron 失效
    用于生产金属铁的直接还原工艺

    公开(公告)号：US4348226A

    公开(公告)日：1982-09-07

    申请号：US186131

    申请日：1980-09-11

    申请人： Mamoru Aoki ,  Masahiro Tomita ,  Kei Utsunomiya ,  Hironobu Sako ,  Dentaro Kaneko ,  Katsunori Shimazaki ,  Yoshitomo Ishii

    发明人： Mamoru Aoki ,  Masahiro Tomita ,  Kei Utsunomiya ,  Hironobu Sako ,  Dentaro Kaneko ,  Katsunori Shimazaki ,  Yoshitomo Ishii

    IPC分类号： C21B13/00 ,  C21B13/02

    CPC分类号： C21B13/0073 ,  Y02P10/136 ,  Y02P10/143 ,  Y02P10/265 ,  Y02P10/283

    摘要： A process for the direct reduction of iron oxide by blowing into a reduction furnace a reducing gas which is prepared by reforming a mixture of a reduction furnace exhaust gas and a gas mainly composed of methane, which comprises the steps of dividing the gas mainly composed of methane into two branch streams, mixing the first branch stream gas with a part of the reduction furnace exhaust gas and supplying the resulting mixture to the externally heated reformer furnace, to produce a high-temperature reformed gas; mixing the second branch stream gas with said high-temperature reformed gas and during the course to the reduction furnace, subjecting the mixture to endothermic reforming reactions in an after-reactor without external heating, utilizing the sensible heat of the high-temperature mixed gas, controlling the self-reforming reactions so as to lower the temperature and simultaneously adjust the composition of the high-temperature mixed gas, and blowing the reducing gas obtained into the reduction furnace. Effective use of the sensible heat can be achieved.

    摘要翻译： 通过将还原炉废气和主要由甲烷构成的气体的混合物进行重整制备的还原气体，通过向还原炉吹入还原气体来直接还原氧化铁的方法，该方法包括以下步骤：将主要由 将甲烷分成两个分支流，将第一分支气体气体与还原炉废气的一部分混合，并将所得混合物供给到外部加热的重整炉中，以产生高温重整气体; 将第二分支气体气体与所述高温重整气体混合，并且在还原炉的过程中，利用高温混合气体的显热，在未经外部加热的混合物中进行吸热重整反应， 控制自重整反应以降低温度并同时调节高温混合气体的组成，并且将获得的还原气体吹入还原炉。 可以有效地利用显热。