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    • 3. 发明公开
    • BLAST FURNACE OPERATING METHOD
    • 埃里恩霍芬福德
    • EP2733223A1
    • 2014-05-21
    • EP12814820.2
    • 2012-07-11
    • JFE Steel Corporation
    • MURAO, AkinoriFUJIWARA, DaikiWATAKABE, Shiro
    • C21B5/00C21B7/00
    • C21B5/00C21B5/003C21B7/00C21B7/163
    • A method for operating a blast furnace that makes it possible to further increase combustion temperature and reduce a unit consumption of reducing agent is provided. When two or more lances for injecting reducing agents from a tuyere are used, and LNG is used as a flammable reducing agent and pulverized coal is used as a solid reducing agent, a position of an end of the lance for injecting LNG is situated closer to a near side in a injecting direction by more than 0 to 50 mm than a position of an end of the lance for injecting pulverized coal. By this, the LNG effectively raises the temperature of the pulverized coal. The LNG contacts oxygen and undergoes combustion earlier, so that explosive diffusion occurs and the temperature of the pulverized coal is drastically increased. This makes it possible to drastically increase the combustion temperature and, thus, to reduce the unit consumption of reducing agent. In addition, when a double wall lance is used as a lance for injecting pulverized coal, the pulverized coal is injected from the inner tube and oxygen is injected from the outer tube, so that it is possible to provide oxygen necessary to the combustion of the pulverized coal and to further increase combustibility. The outlet flow velocity at the lance is 20 to 120 m/sec to prevent deformation of the lance.
    • 提供一种操作高炉的方法,其使得可以进一步提高燃烧温度并减少还原剂的单位消耗。 当使用用于从风口喷射还原剂的两个或更多个喷枪,并且使用LNG作为可燃性还原剂,并且将粉煤用作固体还原剂时,用于喷射LNG的喷枪的端部的位置位于更接近 在喷射方向上的近侧比用于注入粉煤的喷枪的端部的位置大大超过0至50mm。 由此,LNG有效地提高了粉煤的温度。 液化天然气与氧气接触并较早地进行燃烧,从而爆炸扩散,粉煤的温度急剧上升。 这使得可以显着增加燃烧温度,从而降低还原剂的单位消耗。 此外,当使用双壁喷枪作为喷射煤粉的喷枪时,从内管注入粉煤,并从外管注入氧气,从而可以提供燃烧所需的氧气 粉煤并进一步增加可燃性。 喷枪出口流速为20〜120m / sec,防止喷枪变形。
    • 10. 发明公开
    • BLAST FURNACE REPAIR METHOD
    • HOCHOFEN-REPARATURVERFAHREN
    • EP3029159A1
    • 2016-06-08
    • EP14832291.0
    • 2014-07-29
    • Nippon Steel & Sumikin Engineering Co., Ltd.
    • TAKASAKI HiroshiSUDO YujiTAGO Hiroki
    • C21B7/00
    • C21B7/00
    • A method for revamping a blast furnace that has a furnace body and a furnace body tower installed on a site foundation includes: while an old blast furnace is in operation (S1), a new furnace construction step (S2) of constructing a new furnace tower structure and a new furnace proper on the new foundation at a site different from the site foundation; and a foundation segmentation step (S3) of vertically cutting the site foundation to segment the site foundation into a foundation top on which the old furnace proper and the old furnace tower structure are mounted and a foundation bottom; blowing out the blast furnace (S4); an old furnace pull-out step (S5) of carrying out the foundation top integrally with the old furnace proper and the old furnace tower structure; and a new furnace pull-in step (S6) of introducing the new foundation on the foundation bottom integrally with the new furnace tower structure and the new furnace proper.
    • 一种在现场基础上安装有炉体和炉体塔的高炉的改造方法包括:在老式高炉运行中,(S1),构建新的炉塔的新炉施工步骤(S2) 结构和新炉适用于不同于现场基础的场地的新基础; 以及基础分割步骤(S3),将现场基础垂直切割,将现场基础分割成安装旧炉身和旧炉塔结构的基础顶部和基础底部; 吹出高炉(S4); 与旧炉体和旧炉塔结构一体地进行基础顶板的老炉拉出步骤(S5); 以及将新的基础与新的炉塔结构和新的炉子一体地引入基础底部的新的炉子引入步骤(S6)。