Process for producing reduced iron pellets, and process for producing pig iron
    53.
    发明授权
    Process for producing reduced iron pellets, and process for producing pig iron 有权
    生产还原铁丸的方法和生铁生产方法

    公开(公告)号:US09034074B2

    公开(公告)日:2015-05-19

    申请号:US12673141

    申请日:2008-09-11

    摘要: In a method for producing a reduced iron pellet, when a powder formed article including iron oxide and carbon is heated and reduced in a rotary hearth furnace, a formed article produced using a raw material, in which an average diameter of the iron oxide is 50 microns or less and a ratio of carbon monoxide to carbon dioxide in a reduction zone is from 0.3 to 1, is reduced at a temperature of 1400° C. or less, thereby producing a reduced iron pellet in which a metallization ratio of iron is 50 to 85% and a ratio of residual carbon is 2% or less.

    摘要翻译: 在还原铁丸的制造方法中,在转炉式炉中加热还原含有氧化铁和碳的粉末成形体时,使用原料制造成型体,其中氧化铁的平均直径为50 微米或更小,并且还原区中的一氧化碳与二氧化碳的比例为0.3至1,在1400℃或更低的温度下还原,从而产生铁的金属化率为50的还原铁丸 至85%,残留碳的比例为2%以下。

    Partially-reduced iron producing method and partially-reduced iron producing apparatus
    54.
    发明授权
    Partially-reduced iron producing method and partially-reduced iron producing apparatus 有权
    部分还原铁生产方法和部分还原铁生产设备

    公开(公告)号:US08961650B2

    公开(公告)日:2015-02-24

    申请号:US13693581

    申请日:2012-12-04

    摘要: A reduction furnace includes a pellet material supplying device forming on a grate an ignition carbon material layer having a predetermined height; an ignition device; and an exhaust gas circulation device supplying an oxygen-containing gas comprising circulated exhaust gas mixed with air, to a packed bed of the pellets heated by a combustion heat of the ignition carbon material layer. A partially-reduced iron is produced by thermally reducing the pellets through a combustion region for the ignition carbon material layer and a heating region, the combustion region formed upstream in a travelling direction of the grate by supplying a gas having a high oxygen concentration, the heating region formed downstream of the combustion region by supplying a gas having a low oxygen concentration.

    摘要翻译: 还原炉包括在炉排上形成具有预定高度的点火碳材料层的颗粒材料供给装置; 点火装置; 以及废气循环装置,其将包含与空气混合的循环废气的含氧气体供给到通过点燃碳材料层的燃烧热加热的颗粒的填充床。 通过将点火碳材料层和加热区域的燃烧区域热还原,通过供给具有高氧浓度的气体在炉排的行进方向上游形成燃烧区域来产生部分还原的铁, 通过提供具有低氧浓度的气体形成在燃烧区域下游的加热区域。

    Direct production of iron slabs and nuggets from ore without pelletizing or briquetting
    55.
    发明授权
    Direct production of iron slabs and nuggets from ore without pelletizing or briquetting 有权
    从矿石直接生产铁板和矿块,无需造粒或压块

    公开(公告)号:US08906131B2

    公开(公告)日:2014-12-09

    申请号:US13450535

    申请日:2012-04-19

    申请人: John J. Simmons

    发明人: John J. Simmons

    IPC分类号: C21B13/10 C21B13/00

    摘要: Metallic iron is produced from a composition formed from a mixture of iron ore particles and particles of a reductant made of a biomass material, a coal or coke in a particulate form together with a flux and is processed in a loose, un-agglomerated non-pelletized, non-briquetted form in a reducing furnace to produce metallic iron directly from the ore. An excess of biomass or coal or coke reductant can be used to provide CO and H that can be recovered as a synthetic gas and converted to electrical or other energy. Metallic iron nuggets or slabs can be produced from manganiferous ores or concentrates. Manganese can be caused to enter the nugget or slab or the slag by adjusting the furnace temperature. Titaniferous ores or concentrates can be used to produce metallic iron slabs or nuggets and a titanium-rich slag.

    摘要翻译: 金属铁由由铁矿石颗粒和由生物质材料制成的还原剂的颗粒,颗粒形式的煤或焦炭与助熔剂的混合物形成的组合物制成,并且在松散的未结块的非 - 在还原炉中将颗粒状,非压块形式直接从矿石中生产金属铁。 可以使用过量的生物质或煤或焦炭还原剂来提供可作为合成气体回收并转化为电或其他能量的CO和H。 金属铁块或板坯可由锰矿石或精矿生产。 通过调整炉温可以使锰进入熔核或板坯或炉渣。 含铁矿石或浓缩物可用于生产金属铁板或块和富含钛的炉渣。

    System and method for producing metallic iron
    56.
    发明授权
    System and method for producing metallic iron 有权
    金属铁生产系统及方法

    公开(公告)号:US08377371B2

    公开(公告)日:2013-02-19

    申请号:US13245653

    申请日:2011-09-26

    IPC分类号: C21B13/10

    摘要: A battery of stationary hearth furnaces, and method for using, for producing metallic iron nodules having a furnace having a stationary hearth, an inlet and an outlet; a heating chamber beneath the stationary hearth having heated fluids circulated thereto and heating reducible material on the stationary hearth; passageways circulating fluids, through ports from the furnace housing above the reducible material to the heating chamber beneath; burners and air inlets in the furnace and optionally in at least one passageway and a heating chamber for drying and heating the reducible material, driving off and burning volatile material, and forming metallic iron nodules; a loading device for loading reducible material and optionally hearth material onto the stationary hearth through the inlet; and a discharging device capable of discharging metallic iron nodules and optionally related material from the stationary hearth through the outlet.

    摘要翻译: 一种固定的炉底炉,以及用于制造具有炉子的金属铁结核的方法,所述炉具有固定的炉床,入口和出口; 位于固定炉底下的加热室具有循环到其上的加热流体和在固定炉床上的可加热还原材料; 通过循环流体,通过从可还原材料上方的炉壳体到下面的加热室的端口; 燃烧器和空气入口,并且可选地在至少一个通道和加热室中,用于干燥和加热可还原材料,驱除和燃烧挥发性物质,并形成金属铁结核; 用于将可还原材料和任选的炉床材料加载到通过入口的固定炉床上的装载装置; 以及能够通过出口从固定炉床排出金属铁结核和任选的相关材料的排出装置。

    Method and apparatus for manufacturing granular metallic iron
    57.
    发明授权
    Method and apparatus for manufacturing granular metallic iron 有权
    颗粒状金属铁的制造方法和装置

    公开(公告)号:US08377169B2

    公开(公告)日:2013-02-19

    申请号:US12446467

    申请日:2007-10-18

    IPC分类号: C21B13/10

    摘要: A method for manufacturing granular metallic iron by reducing a raw material mixture including an iron oxide-containing material and a carbonaceous reducing agent, comprises: a step of charging the raw material mixture onto a hearth of a moving hearth-type thermal reduction furnace; a step of reducing the iron oxide in the raw material mixture by the carbonaceous reducing agent through the application of heat, thereby forming metallic iron, subsequently melting the metallic iron, and coalescing the molten metallic iron to granular metallic iron while separating the molten metallic iron from subgenerated slag; and a step of cooling the metallic iron to solidify; wherein the heat-reducing step includes a step of controlling the flow velocity of atmospheric gas in a predetermined zone of the furnace within a predetermined range. This method makes it possible to manufacture the granular metallic iron of high quality.

    摘要翻译: 通过还原包含含氧化铁的材料和碳质还原剂的原料混合物来制造颗粒状金属铁的方法包括:将原料混合物装入移动的炉床式热还原炉的炉床上的步骤; 通过加热使碳质还原剂还原原料混合物中的氧化铁的步骤,从而形成金属铁,随后熔化金属铁,并将熔融金属铁聚结成粒状金属铁,同时分离熔融金属铁 来自次生渣 和冷却金属铁固化的步骤; 其特征在于,所述减热工序包括在预定范围内控制所述炉的预定区域内的气氛气体的流速的步骤。 该方法可以制造高质量的粒状金属铁。

    APPARATUS AND METHODS FOR PRODUCING DIRECT REDUCED IRON
    58.
    发明申请
    APPARATUS AND METHODS FOR PRODUCING DIRECT REDUCED IRON 审中-公开
    用于生产直接还原铁的装置和方法

    公开(公告)号:US20120325053A1

    公开(公告)日:2012-12-27

    申请号:US13582180

    申请日:2011-03-02

    申请人: Giulio Grossi

    发明人: Giulio Grossi

    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: 描述了一种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的炉床以接收氧化铁和还原剂。 设置在每个旋转炉床上的一组摇摆物与氧化铁相互作用并将氧化铁推向每个旋转炉床的内部或外部边缘。 所述第一燃烧室具有连接到所述第二燃烧室的入口的出口,以接收由所述第一燃烧室的冲击物推动到所述第一燃烧室出口的材料。 该炉还包括一个或多个用于在第二和第一燃烧室之间传送还原气体和加热的气体输送通道。

    USE OF BIMODAL CARBON DISTRIBUTION IN COMPACTS FOR PRODUCING METALLIC IRON NODULES
    59.
    发明申请
    USE OF BIMODAL CARBON DISTRIBUTION IN COMPACTS FOR PRODUCING METALLIC IRON NODULES 有权
    二氧化碳分配在生产金属铁矿石的混合物中的应用

    公开(公告)号:US20120160060A1

    公开(公告)日:2012-06-28

    申请号:US12977035

    申请日:2010-12-22

    申请人: Iwao Iwasaki

    发明人: Iwao Iwasaki

    IPC分类号: C21B13/10 C22B11/10

    摘要: A method for use in production of metallic iron nodules comprising providing a reducible mixture into a hearth furnace for the production of metallic iron nodules, where the reducible mixture comprises a quantity of reducible iron bearing material, a quantity of first carbonaceous reducing material of a size less than about 28 mesh of an amount between about 65 percent and about 95 percent of a stoichiometric amount necessary for complete iron reduction of the reducible iron bearing material, and a quantity of second carbonaceous reducing material with an average particle size greater than average particle size of the first carbonaceous reducing material and a size between about 3 mesh and about 48 mesh of an amount between about 20 percent and about 60 percent of a stoichiometric amount of necessary for complete iron reduction of the reducible iron bearing material.

    摘要翻译: 一种用于生产金属铁结核的方法,包括将可还原的混合物提供到用于生产金属铁结核的炉底炉中,其中可还原的混合物包含一定数量的可还原铁轴承材料,一定量的第一碳质还原材料 少于约28目的量的可还原铁轴承材料的完全铁还原所需的化学计量量的约65%至约95%的量,以及平均粒度大于平均粒度的第二碳质还原材料的量 的第一碳质还原材料,并且约3目和约48目之间的尺寸为可还原铁轴承材料的完全铁还原所需的化学计量量的约20%至约60%之间的量。

    Forehearth
    60.
    发明授权
    Forehearth 有权
    前膛

    公开(公告)号:US07828873B2

    公开(公告)日:2010-11-09

    申请号:US11912781

    申请日:2006-04-26

    申请人: Matthew John Gurr

    发明人: Matthew John Gurr

    IPC分类号: C21C5/42 C21C7/072 C21B13/10

    摘要: A direct smelting vessel (3) for operating a molten bath-based direct smelting process under pressure conditions in the vessel is disclosed. The vessel includes a forehearth (67) for tapping molten metal continuously from the vessel. The forehearth includes an open connection (97) that extends through a side wall of the vessel into the interior of the vessel. The open connection is formed to dampen the impact of sudden changes in pressure in the vessel on molten metal flow in the forehearth that could result in an undesirable surge of molten metal from the forehearth. The open connection is also formed so that molten metal does not freeze in the connection for at least 6 hours when molten metal is not being discharged from the vessel into the forehearth via the open connection.

    摘要翻译: 公开了一种用于在压力条件下在容器中操作基于熔池的直接熔炼过程的直接熔炼炉(3)。 容器包括用于从容器连续地排出熔融金属的前炉(67)。 前炉包括一个开口连接件(97),其通过容器的侧壁延伸到容器的内部。 形成开放连接以抑制容器中突然的压力变化对前炉中熔融金属流的影响,这可能导致来自前炉的不希望的熔融金属浪涌。 开口连接也形成为使熔融金属在熔融金属未通过开放连接从容器排放到前炉中时不会在连接中冻结至少6小时。