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    • 4. 发明专利
    • Method for operating vertical furnace
    • 操作垂直炉的方法
    • JP2009079287A
    • 2009-04-16
    • JP2008176968
    • 2008-07-07
    • Kuettner Gmbh & Co KgNippon Steel Corpクットナー ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディト ゲゼルシャフト新日本製鐵株式会社
    • SHINOTAKE AKIHIKOOMATSU YASUHIKONAITO MASAAKIAKAGI KAZUSHITSUBOTA ATSUSHIKIKUCHI ZENETSUMURASE SHINLACHNER HANS JAANLEMPERLE MICHEL
    • C21B11/02C22B7/02
    • C21B11/02C21B5/008C21B13/023C21B2200/00C21C5/562C21C2200/00C22B7/003C22B9/16F27B1/16F27B1/20Y02P10/216
    • PROBLEM TO BE SOLVED: To provide a method for efficiently and stably melting an iron source that contains a large amount of an iron scrap of thin sheets, for a long period of time, while inhibiting the base metal from depositing on a furnace wall, and preventing a bridging phenomenon, the increase in pressure loss and the aggravation in air permeability. SOLUTION: In a method for operating a vertical furnace by alternately charging the iron source which contains 50 to 90 mass% of the iron scrap of the thin sheets and coke onto a bed of coke that has been charged in a lower part of the furnace from the furnace top so that they form layers, and melting the iron source while sending air through tuyeres of the lower part of the furnace, this operation method includes the steps of: (a) dividing the iron scrap of the thin sheets into two parts so that the ratio of the iron scrap of the thin sheets after having been divided with respect to the whole quantity of the iron source becomes 50 mass% or less in both of the parts, for one charge in a raw material feeding bucket; (b) inserting at least any of raw materials among an iron scrap of thick plates, an iron source excluding iron scrap and coke, in an interval between the charges of the divided iron scraps of the thin sheets; and then (c) alternately charging the divided iron scraps of the thin sheets and any of the iron scrap of the thick plates, the iron source excluding the iron scrap and the coke so that they form layers, into the furnace through the raw material feeding bucket. COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:为了提供一种用于高效稳定地熔化含有大量废铁薄铁片的铁源的方法,同时抑制贱金属沉积在炉子上 防止桥接现象,压力损失的增加和透气性的恶化。 解决方案:在用于操作立式炉的方法中,通过交替地将含有50-90质量%的薄片和焦炭的铁屑的铁源装载到已经装入下部的焦炭床上 来自炉顶的炉,使得它们形成层,并且在通过炉下部的风嘴送空气的同时熔化铁源,该操作方法包括以下步骤:(a)将薄片的废铁分为 两部分,使得原料进料斗中的一次装料在两部分中相对于铁源的总量分割后的薄片的铁屑的比例为50质量%以下。 (b)在薄板的铁屑之间的间隔内,在厚板的铁屑,不包括废铁和焦炭的铁源中插入至少任何原料; 然后(c)交替地将薄片的分割铁屑和厚板的铁屑,不包括废铁的焦炭和焦炭形成层,通过原料进料加入炉中 桶。 版权所有(C)2009,JPO&INPIT