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    PROCESSED DRI MATERIAL
    4.
    发明公开
    PROCESSED DRI MATERIAL 审中-公开

    公开(公告)号：EP2614172A4

    公开(公告)日：2018-05-09

    申请号：EP11824175

    申请日：2011-09-09

    申请人： NU IRON TECH LLC

    发明人： LEVANDUSKI GARY M ,  BARTHOLOMEW KYLE ,  HENDRICKSON DAVID W ,  MANNING CHRISTOPHER P ,  RAMJEWAN ANTHONY

    IPC分类号： C23C4/02 ,  B07B1/00 ,  C21B11/06 ,  C21B13/08 ,  C22B1/24

    CPC分类号： B07B1/00 ,  C21B11/06 ,  C21B13/08 ,  Y02P10/136 ,  Y10T428/2982 ,  Y10T428/2991

    摘要： A processed DRI material having an average surface roughness (Ra) of less than 1.5 μm is disclosed. A method and system for making processed DRI are also disclosed. One embodiment of the method and system may include assembling a rotatable chamber having an internal screen capable of supporting DRI during tumbling, with at least one opening in the chamber to permit fines to exit the chamber during tumbling, and delivering DRI into the chamber to tumble the DRI on the screen to remove fines from the DRI. Another embodiment of the method and system may include assembling a rotatable chamber having a feed end and an exit end, and having a screen therein capable of supporting DRI as the DRI moves through the chamber, and delivering DRI to the chamber and rotating the chamber to tumble the DRI while removing fines.

    APPARATUS AND METHODS FOR PRODUCING DIRECT REDUCED IRON
    5.
    发明公开
    APPARATUS AND METHODS FOR PRODUCING DIRECT REDUCED IRON 审中-公开
    VORRICHTUNG UND VERFAHREN ZUR HERSTELLUNG VON DIREKT REDUZIERTEM EISEN

    公开(公告)号：EP2542706A4

    公开(公告)日：2017-06-14

    申请号：EP11750122

    申请日：2011-03-02

    申请人： GROSSI GIULIO

    发明人： GROSSI GIULIO

    IPC分类号： C21B13/08 ,  C21B13/06 ,  C21B13/10 ,  C21B13/14 ,  F27B9/18

    CPC分类号： C21B13/06 ,  C21B13/105 ,  C21B13/143 ,  F27B9/185 ,  Y02P10/136

    摘要： A hearth furnace for producing direct reduced iron is described. The furnace has first and second combustion chambers, each having a rotating hearth within it to receive iron oxide and reducing agent. A set of rabbles disposed over each of the rotating hearths interacts with the iron oxide and pushes the iron oxide towards an inside or an outside edge of each rotating hearth. The first combustion chamber having an outlet connected to an inlet of the second combustion chamber to receive materials pushed by the rabbles of the first combustion chamber to the first combustion chamber outlet. The furnace further comprising one or more gas transfer channels for transferring reduction gasses and heat between the second and first combustion chambers.

    摘要翻译： 描述了用于生产直接还原铁的炉底炉。 该炉具有第一和第二燃烧室，每个燃烧室在其内具有旋转炉膛以接收氧化铁和还原剂。 布置在每个旋转炉膛上的一组布料与氧化铁相互作用并将氧化铁推向每个旋转炉膛的内侧或外侧边缘。 第一燃烧室具有连接到第二燃烧室的入口的出口，以接收被第一燃烧室的垃圾推动到第一燃烧室出口的材料。 炉还包括一个或多个气体传送通道，用于在第二和第一燃烧室之间传送还原气体和热量。

    METHOD FOR OPERATING ROTARY HEARTH TYPE REDUCING FURNACE AND ROTARY HEARTH TYPE REDUCING FURNACE FACILITIES
    8.
    发明授权
    METHOD FOR OPERATING ROTARY HEARTH TYPE REDUCING FURNACE AND ROTARY HEARTH TYPE REDUCING FURNACE FACILITIES 有权
    运行方法用于车削COOKER还原炉转底炉还原和DEVICES

    公开(公告)号：EP1340822B1

    公开(公告)日：2008-01-16

    申请号：EP01982753.4

    申请日：2001-11-09

    申请人： Nippon Steel Corporation

    发明人： IBARAKI, Tetuharu ,  ODA, Hiroshi ,  TAKAHASHI, Masaharu

    IPC分类号： C21B13/10 ,  C21B11/08 ,  F27D17/00 ,  C22B1/16 ,  C21B13/08

    CPC分类号： C21B13/105 ,  C21B13/0073 ,  C21B13/10 ,  C21B2100/44 ,  C21B2100/66 ,  C22B5/10 ,  F27B9/16 ,  F27D17/004 ,  Y02P10/136 ,  Y02P10/216

    摘要： A method of operating a rotary hearth type reducing furnace, characterized in that a combustion gas generated in the furnace is held in a state, wherein the temperature of the gas is 800 DEG C or higher, the concentration of carbon monoxide is 2000 ppm by volume or less and turbulent flow is satisfactorily developed, for a period of a predetermined time or more, in at least one of the inside of an exhaust gas exit duct and the vicinity of the exhaust gas exit duct, and then is cooled rapidly; and rotary hearth type reducing furnace facilities required for the practice of the method of operation. The operating method allows the suppression of generation of dioxins in a combustion exhaust gas and also the efficient recovery of heat from the combustion exhaust gas having an elevated temperature, in a process of firing and reducing pellets or the like formed from a ore powder such as a chromium ore or iron ore powder, or a dust, a sludge or the like containing an oxidized metal such as iron oxide generated in the metal industry in a rotary hearth type reducing furnace, and also allows the total mole number of zinc and lead, the total mole number of alkali metals, and the total mole number of halogen elements contained in a dust in the combustion exhaust gas to be controlled so that the three numbers satisfy a specific relationship.