Carbon containing nonfired agglomerated ore for blast furnace and production method thereof
    2.
    发明授权
    Carbon containing nonfired agglomerated ore for blast furnace and production method thereof 有权
    含碳高炉无火烧结矿石及其制造方法

    公开(公告)号:US06918944B2

    公开(公告)日:2005-07-19

    申请号:US10446638

    申请日:2003-05-28

    CPC分类号: C21B5/007 Y02P10/216

    摘要: A nonfired agglomerated ore which is satisfactory in reduction property in the shaft of a blast furnace and excellent in rapid heating bursting property and a production method thereof are provided. A carbon containing nonfired agglomerated ore for blast furnace which is prepared in such a way that iron oxide and a carbonaceous material are blended with each other to prepare a mixture, a binder is added to the mixture, and the mixture is kneaded, formed, and cured, wherein the agglomerated ore contains carbon in the content of 80 to 120% of the theoretical carbon quantity required to reduce the reducible oxygen in the iron ores to form metallic iron, and the binder is selected so that the crushing strength may be 7,850 kN/m2 or more at room temperature.

    摘要翻译: 提供了一种在高炉的轴中的还原性良好并且具有优异的快速加热破裂性的非烧结的团聚矿石及其制造方法。 一种用于高炉的含碳非烧结聚集矿石,其以将氧化铁和碳质材料彼此混合以制备混合物的方式制备,向混合物中加入粘合剂,并将混合物捏合,形成和 固化,其中,附聚矿石含有碳,其含量为减少铁矿石中可还原氧以形成金属铁所需的理论碳量的80至120%,并且选择粘合剂使得抗碎强度可为7,850kN / m 2以上。

    Operation method of vertical furnace
    4.
    发明授权
    Operation method of vertical furnace 失效
    立式炉操作方法

    公开(公告)号:US6129776A

    公开(公告)日:2000-10-10

    申请号:US913836

    申请日:1997-09-23

    摘要: A method for operating a shaft furnace which comprises charging the furnace with an iron source having a low degree of metallization and thus requiring reduction, an iron source having a high degree of metallization and thus requiring nothing but melting, and a solid fuel, and blowing an oxygen-containing gas at ordinary or higher temperature up to 600.degree. C. into the furnace through tuyeres to reduce and melt the iron sources. The optimal values of .eta.co (gas utilization factor) are determined from the average degree of metallization of the iron sources, and the shaft furnace is controlled so that the effluent gas from the furnace has the optimal .eta.co values. The control is accomplished by regulating the height of the charge, regulating the height of the coke bed, etc., using multistage tuyeres, and radially partitioning the charge. Thus, the iron sources can be efficiently reduced and melted at a low fuel ratio.

    摘要翻译: PCT No.PCT / JP97 / 00164 Sec。 371日期1997年9月23日 102(e)1997年9月23日PCT PCT 1997年1月24日PCT公布。 公开号WO97 / 27337 日期1997年7月31日一种用于操作竖炉的方法,其包括用具有低金属化程度的铁源并且因此需要还原的铁源,具有高度金属化的铁源,因此仅需要熔化, 固体燃料,并通过风口将通常或更高温度至600℃的含氧气体吹入炉中以减少和熔化铁源。 eta co(气体利用系数)的最优值由铁源的平均金属化度确定,并且控制竖炉,使得来自炉的废气具有最佳的η值。 通过使用多级风口调节电荷的高度,调节焦炭床的高度等,以及径向分配电荷来实现控制。 因此,可以以低燃料比有效地还原和熔融铁源。