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    POWDER INJECTION LANCE AND METHOD OF REFINING MOLTEN IRON USING SAID POWDER INJECTION LANCE
    1.
    发明公开
    POWDER INJECTION LANCE AND METHOD OF REFINING MOLTEN IRON USING SAID POWDER INJECTION LANCE 审中-公开
    PULVEREINBLASLANZE和方法进行精炼铁水使用本PULVEREINBLASLANZE

    公开(公告)号：EP2752497A4

    公开(公告)日：2016-03-02

    申请号：EP12841632

    申请日：2012-10-16

    申请人： JFE STEEL CORP

    发明人： OKUYAMA GORO ,  KIKUCHI NAOKI ,  UCHIDA YUICHI ,  TAKAHASHI YUKIO ,  SATO SHINGO ,  NAKASE KENJI ,  TA YASUTAKA ,  MIKI YUJI

    IPC分类号： C21C5/46 ,  C21C1/02 ,  C21C5/30

    CPC分类号： C21C5/32 ,  C21C1/02 ,  C21C5/35 ,  C21C5/4606 ,  C21C5/462 ,  C21C5/5217 ,  C21C7/0037 ,  F27D2019/0034 ,  F27D2019/0075 ,  Y02P10/216

    摘要： A top-blowing lance with which the hot metal blend ratio can be reduced and a method for refining molten iron and a smelting reduction method for molten metal using the injection lance are proposed. The top-blowing lance includes a refining oxygen gas blowing nozzle having a plurality of ejection openings through which oxygen gas is blown into an iron bath in a reaction vessel, the ejection openings being disposed along a circular orbit at intervals, and a burner nozzle having an axis coaxial with the central axis of the circular orbit, forming a flame inside the refining oxygen gas blowing nozzle, and having ejection openings for blowing a powder heated by the flame into the iron bath, wherein an indicator A that indicates the positional relationship between the ejection openings of the refining oxygen gas blowing nozzle and the ejection openings of the burner nozzle satisfies the following condition: A = 1.7 �¢ R - r - d / 2 / L + tan ¸ - 12 �¢ ° - 0.0524 > 0 where R denotes the pitch circle radius of the ejection openings of the refining oxygen gas blowing nozzle (mm), r denotes the radius of the ejection openings of the burner nozzle (mm), d denotes the diameter of the ejection openings of the refining oxygen nozzle (mm), ¸ denotes the angle (inclination) between the axis of the refining oxygen gas blowing nozzle and the central axis of the circular orbit (°), and L denotes the lance height (mm).

    METHOD FOR REFINING HOT METAL IN CONVERTER
    2.
    发明公开
    METHOD FOR REFINING HOT METAL IN CONVERTER 有权
    EEREM KONVERTER中的VERFAHREN ZUR VERFEINERUNG VON HEISSEM金属

    公开(公告)号：EP2808407A4

    公开(公告)日：2015-09-02

    申请号：EP13767440

    申请日：2013-03-25

    申请人： JFE STEEL CORP

    发明人： NAKASE KENJI ,  TAKAHASHI YUKIO ,  KIKUCHI NAOKI ,  OKUYAMA GORO ,  SATO SHINGO ,  UCHIDA YUICHI ,  MIKI YUJI

    IPC分类号： C21C5/30 ,  C21C1/02 ,  C21C5/35 ,  C21C5/46 ,  C21C7/00 ,  C21C7/064 ,  C21C7/068 ,  C21C7/072

    CPC分类号： C21C5/32 ,  C21C1/025 ,  C21C5/35 ,  C21C5/4606 ,  C21C5/4613 ,  C21C7/0037 ,  C21C7/064 ,  C21C7/068 ,  C21C7/072 ,  C21C2250/00 ,  Y02P10/212

    摘要： Provided is a method for refining hot metal in a converter by dephosphorizing or decarburizing the hot metal while forming a burner flame at the leading end of a top-blowing lance to transfer the heat of the flame to the hot metal, thereby providing high heat transfer efficiency and productivity without the risk of heat-up or combustion in a channel in the top-blowing lance so that the content of a cold iron source such as iron and steel scrap can be increased. A method for refining hot metal in a converter using a top-blowing lance 3 having a refining powder supply channel, a combustion oxidizing gas supply channel, and a refining oxidizing gas supply channel that are separate from each other includes supplying at least one of a lime-based flux, iron oxide, and a combustible material as a refining powder 29 from the refining powder supply channel to a surface of the hot metal using a fuel gas or a mixture of the fuel gas and an inert gas as a carrier gas while supplying a combustion oxidizing gas from the combustion oxidizing gas supply channel to form a flame below a leading end of the top-blowing lance, and supplying a refining oxidizing gas from the refining oxidizing gas supply channel to the surface of the hot metal.

    摘要翻译： 本发明提供一种在转炉中通过在顶吹喷枪的前端形成燃烧器火焰的同时对该热金属进行脱磷或脱碳来转化炉中的热金属的方法，以将火焰的热量转移到热金属上，从而提供高的热传递 效率和生产率，而不会在顶吹喷枪的通道中发生加热或燃烧的风险，从而可以增加诸如铁和废钢的冷铁源的含量。 使用具有彼此分离的精炼粉供应通道，燃烧氧化气体供给通道和精炼氧化气体供给通道的顶吹喷枪3，在转炉中精炼热金属的方法包括：将至少一个 石灰基助熔剂，氧化铁和作为精炼粉末29的可燃材料，其使用燃料气体或燃料气体和惰性气体的混合物作为载气，从精炼粉末供给通道向铁水的表面供给，同时 从所述燃烧氧化气体供给路径供给燃烧氧化气体，在所述顶吹喷枪前端形成火焰，并将精炼氧化气体从所述精炼用氧化气体供给流路供给到所述热金属表面。

    METHOD FOR OPERATING TOP-BLOWN CONVERTER
    3.
    发明公开
    METHOD FOR OPERATING TOP-BLOWN CONVERTER 审中-公开

    公开(公告)号：EP3279340A4

    公开(公告)日：2018-02-07

    申请号：EP16772595

    申请日：2016-03-25

    申请人： JFE STEEL CORP

    发明人： TAKAHASHI YUKIO ,  AMANO SHOTA ,  TAWA TOSHINORI ,  UCHIDA YUICHI ,  MIKI YUJI

    IPC分类号： C21C5/35 ,  C21C5/46 ,  C21C5/48

    CPC分类号： C21C5/35 ,  C21C5/46 ,  C21C5/48

    摘要： [Task] It is to provide a method of operating a top and bottom blowing converter which is capable of suppressing oscillation of a converter and generation of duct and also suppressing wear of furnace wall refractory in a decarburization refining with a top and bottom blowing converter. [Solution] A method of operating a top and bottom blowing converter by using a top-blown multihole lance having a plurality of lance nozzles for jetting oxygen gas, jetting oxygen jets from the lance nozzles at a nozzle tilting angle inclined with respect to a center axis of the top-blown multihole lance, disposing n bottom-blown tuyeres in a bottom of the converter and blowing an agitating gas from the bottom-blown tuyeres, wherein an interference rate (IR) showing an involving degree between a hot spot formed by impinging the oxygen jet jetted from the top-blown multihole lance to a bath surface of molten iron and an agitating gas floating region formed on a bath surface of molten iron by blowing and floating the agitating gas from the bottom-blown tuyeres in molten iron is not more than 0.7.