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    Iron production method of operation in a rotary hearth furnace and improved furnace apparatus
    4.
    发明授权
    Iron production method of operation in a rotary hearth furnace and improved furnace apparatus 有权
    在转炉炉中操作的铁生产方法和改进的炉装置

    公开(公告)号：US06413295B2

    公开(公告)日：2002-07-02

    申请号：US09266989

    申请日：1999-03-12

    申请人： David C. Meissner ,  Glenn E. Hoffman ,  Kyle J. Shoop ,  Takuya Negami ,  Akira Uragami ,  Yasuhiro Tanigaki ,  Shuzo Ito ,  Isao Kobayashi ,  Osamu Tsuge ,  Koji Tokuda ,  Shoichi Kikuchi

    发明人： David C. Meissner ,  Glenn E. Hoffman ,  Kyle J. Shoop ,  Takuya Negami ,  Akira Uragami ,  Yasuhiro Tanigaki ,  Shuzo Ito ,  Isao Kobayashi ,  Osamu Tsuge ,  Koji Tokuda ,  Shoichi Kikuchi

    IPC分类号： C21B1310

    CPC分类号： C21B13/10 ,  C21B13/105 ,  Y02P10/136

    摘要： The present invention is an apparatus and method for the direct reduction of iron oxide utilizing a rotary hearth furnace to form a high purity carbon-containing iron metal button. The hearth layer may be a refractory or a vitreous hearth layer of iron oxide, carbon, and silica compounds. Additionally, coating materials may be introduced onto the refractory or vitreous hearth layer before iron oxide ore and carbon materials are added, with the coating materials preventing attack of the molten iron on the hearth layer. The coating materials may include compounds of carbon, iron oxide, silicon oxide, magnesium oxide, and/or aluminum oxide. The coating materials may be placed as a solid or a slurry on the hearth layer and heated, which provides a protective layer onto which the iron oxide ores and carbon materials are placed. The iron oxide is reduced and forms molten globules of high purity iron and residual carbon, which remain separate from the hearth layer. An improved apparatus includes a cooling plate that is placed in close proximity with the refractory or vitreous hearth layer, cooling the molten globules to form iron metal buttons that are removed from the hearth layer. The improvements due to the present apparatus and method of operation provide high purity iron and carbon solid buttons, which are separate from slag particulates, and discharged without significant loss of iron product to the interior surfaces of the furnace.

    摘要翻译： 本发明是利用旋转炉床炉直接还原氧化铁以形成高纯度含碳铁金属按钮的装置和方法。 炉床层可以是氧化铁，碳和二氧化硅化合物的耐火材料或玻璃质炉床层。 此外，在添加氧化铁矿石和碳材料之前，可以将涂层材料引入耐火玻璃炉床层，涂层材料防止炉底层上的铁水的侵蚀。 涂层材料可以包括碳，氧化铁，氧化硅，氧化镁和/或氧化铝的化合物。 涂层材料可以作为固体或浆料放置在炉床层上并被加热，这提供了氧化铁矿石和碳材料放置在其上的保护层。 氧化铁被还原，形成高纯铁和剩余碳的熔池，它们与炉底层分开。 一种改进的装置包括一个靠近耐火玻璃炉底层放置的冷却板，冷却熔池以形成从炉床层去除的铁金属纽扣。 由于本设备和操作方法的改进提供了与炉渣微粒分离的高纯度铁和碳固体按钮，并且在铁的内表面没有显着损失的铁排出。

    Method of producing metallic iron
    9.
    发明授权
    Method of producing metallic iron 有权
    金属铁生产方法

    公开(公告)号：US06630010B2

    公开(公告)日：2003-10-07

    申请号：US09818591

    申请日：2001-03-28

    申请人： Shuzo Ito ,  Yasuhiro Tanigaki ,  Shoichi Kikuchi ,  Osamu Tsuge ,  Isao Kobayashi ,  Keisuke Honda ,  Koji Tokuda ,  Hidekazu Okamoto

    发明人： Shuzo Ito ,  Yasuhiro Tanigaki ,  Shoichi Kikuchi ,  Osamu Tsuge ,  Isao Kobayashi ,  Keisuke Honda ,  Koji Tokuda ,  Hidekazu Okamoto

    IPC分类号： C21B1100

    CPC分类号： F27B9/28 ,  C21B13/10 ,  C21B13/105 ,  Y02P10/136

    摘要： The present invention is directed to a method of producing granular metallic iron, including: heating a formed raw material comprising a carbonaceous reductant and a substance containing iron oxide in a reduction melting furnace to subject the iron oxide contained in the formed raw material to solid-state reduction; and carburizing reduced iron resulting from the solid-state reduction with carbon contained in the carbonaceous in the formed raw material and causing resulting molten metallic iron to coalesce into the granular metallic iron, wherein an atmospheric gas present in proximity to the formed raw material in the carburizing and melting step has a reduction degree of not less than 0.5. The present invention is also directed to a method of producing metallic iron, including forming a deposit layer containing slag produced in the reduction melting process on hearth refractories, thereby protecting the hearth refractories while producing the metallic iron. The present invention is further directed to a device for supplying an auxiliary raw material to a hearth of a moving hearth type reduction melting furnace adapted to produce metallic iron, the device including a supply duct vertically connecting with a ceiling portion of the furnace.

    摘要翻译： 本发明涉及一种生产颗粒状金属铁的方法，包括：在还原熔化炉中加热包含碳质还原剂的成形原料和含有氧化铁的物质，以使所形成的原料中所含的氧化铁固化， 国家减少 以及由所形成的原料中的碳质中含有的碳的固态还原产生的还原铁的渗碳，并使所得到的熔融金属铁凝聚成粒状金属铁，其中存在于所形成的原料中的气氛气体 渗碳熔融工序的还原度为0.5以上。 本发明还涉及一种生产金属铁的方法，包括在炉底耐火材料上形成包含在还原熔炼过程中产生的炉渣的沉积层，从而在制造金属铁的同时保护炉底耐火材料。 本发明还涉及一种用于将辅助原材料供应到适于生产金属铁的移动炉床式还原熔化炉的炉床中的装置，该装置包括与炉顶部垂直连接的供应管道。

    Method of manufacturing molten metal iron
    10.
    发明授权
    Method of manufacturing molten metal iron 失效
    制造熔融金属铁的方法

    公开(公告)号：US06569223B2

    公开(公告)日：2003-05-27

    申请号：US09819743

    申请日：2001-03-29

    申请人： Yasuhiro Tanigaki ,  Osamu Tsuge ,  Isao Kobayashi ,  Keisuke Honda ,  Koji Tokuda ,  Shoichi Kikuchi ,  Shuzo Ito

    发明人： Yasuhiro Tanigaki ,  Osamu Tsuge ,  Isao Kobayashi ,  Keisuke Honda ,  Koji Tokuda ,  Shoichi Kikuchi ,  Shuzo Ito

    IPC分类号： C21B1108

    CPC分类号： C21B13/10 ,  C21B11/08 ,  C21B13/085 ,  C21B13/105 ,  F27B9/16 ,  F27B9/30 ,  F27B9/39 ,  F27D1/0043 ,  F27D3/08 ,  F27D3/14 ,  F27D25/00 ,  Y02P10/136

    摘要： A method of manufacturing a molten metal iron by charging a starting material at least comprising a carbonaceous reducing material and an iron oxide-containing material into a rotary hearth furnace, reducing under heating the charged starting material into a solid reducing iron, carburizing the metal iron in the solid reduced iron with the carbon ingredient in the carbonaceous reducing material, thereby melting the metal iron, separating the slag ingredient contained in the starting material by the melting, and discharging the molten metal alloy in the molten state as it is to the outside of the rotary hearth furnace for recovery, wherein a downward inclined surface is disposed at an angle 3 to 30° relative to the horizontal plane on the upper surface of a hearth of the rotary hearth furnace on which the starting material is placed, and the molten metal iron is discharged at the discharging position for the molten metal iron from the lowest portion of the inclined surface.

    摘要翻译： 通过将至少包含碳质还原材料和含铁氧化物的原料的起始材料装入转底炉中来制造熔融金属铁的方法，将加入的起始原料还原成固体还原铁，将金属铁渗碳 在含碳还原材料中的碳成分的固体还原铁中，由此熔化金属铁，通过熔化分离原料中所含的渣成分，并将处于熔融状态的熔融金属合金原样排出到外部 用于回收的转底炉，其中向下倾斜的表面相对于其上放置起始材料的转底炉的炉床的上表面上的水平面以3°至30°的角度设置，并且熔融 金属铁从倾斜表面的最低部分在熔融金属铁的排出位置排出。