2-stage fluidized bed type fine iron ore reducing apparatus, and reducing method using the apparatus
    1.
    发明授权
    2-stage fluidized bed type fine iron ore reducing apparatus, and reducing method using the apparatus 失效
    2级流化床细铁矿石还原装置,以及使用该装置的还原方法

    公开(公告)号:US06491738B1

    公开(公告)日:2002-12-10

    申请号:US09763299

    申请日:2001-02-20

    IPC分类号: C21B1314

    摘要: A two-stage fluidized bed reducing apparatus and a reducing method for fine iron ore of a wide particle size distribution with an increased degree of utilization of the reducing gas. Fine iron particles dropping through the holes of a gas distributor can be recycled into the fluidized bed furnace, thereby preventing an impediment of the reducing gas flow due to abnormal defluidizing or channeling. A first fluidized bed furnace dries, pre-heats and pre-reduces the fine iron ore, and a second fluidized bed furnace finally reduces the pre-reduced iron ore. Downstream of the respective fluidized beds are installed intermediate hoppers and gas/solid sealing valves. Thus, the fine iron ore particles which drop through the holes of gas distributors during the abnormal operation are recycled to the furnaces. Accordingly, the gas flow is not impeded.

    摘要翻译: 一种二级流化床还原装置和一种具有较宽粒度分布的细铁矿石的还原方法,其还原气体的利用程度提高。 通过气体分配器的孔落下的细小铁颗粒可以循环进入流化床炉,从而防止由于异常流失或引流引起的还原气流的阻碍。 第一流化床炉干燥,预热和预还原细铁矿石,第二流化床炉最终减少预还原的铁矿石。 各流化床的下游安装有中间料斗和气体/固体密封阀。 因此,在异常操作期间通过气体分配器的孔落下的细铁矿石颗粒被再循环到炉中。 因此,气流不受阻碍。

    Apparatus for reducing fine iron ore
    2.
    发明授权
    Apparatus for reducing fine iron ore 失效
    减少铁矿石的设备

    公开(公告)号:US5897829A

    公开(公告)日:1999-04-27

    申请号:US894802

    申请日:1997-08-28

    摘要: A device for three-stage fluidized bed for reducing a fine iron ore in accordance with the present invention comprises: a first single-type fluidized bed furnace for drying/pre-heating a fine iron ore in a bubbling fluidized state; a first cyclone for collecting fine iron ore particles entrained in an exhaust gas from the first fluidized bed furnace; a second single-type fluidized bed furnace for pre-reducing the fine iron ore dried/pre-heated in the first fluidized bed furnace; a second cyclone for collecting fine iron ore particles entrained in an exhaust gas from the second fluidized bed furnace; a third twin-type fluidized bed furnace comprising a first cylindrical reaction furnace and a second reaction furnace for finally reducing coarse iron ore particles and medium/fine iron ore particles, respectively, which are pre-reduced in the second fluidized bed furnace; a third cyclone for collecting medium/fine iron ore particles entrained in an exhaust gas from the first reaction furnace of the third fluidized bed furnace; and a fourth cyclone for collecting ultrafine iron ore particles entrained in an exhaust gas from the second furnace of the third fluidized bed furnace.

    摘要翻译: PCT No.PCT / KR96 / 00261 Sec。 371日期1997年8月28日 102(e)日期1997年8月28日PCT 1996年12月28日PCT公布。 WO97 / 24463 PCT出版物 日本1997年7月10日根据本发明的用于还原精细铁矿石的三级流化床装置包括:用于干燥/预热起泡流化状态的细铁矿石的第一单式流化床炉 ; 用于收集夹带在来自第一流化床炉的废气中的细铁矿石颗粒的第一旋风器; 用于预还原在第一流化床炉中干燥/预热的细铁矿石的第二单流化床炉; 第二旋风器,用于收集夹带在来自第二流化床炉的废气中的细铁矿石颗粒; 第三双流化床炉,包括分别在第二流化床炉中预还原的第一圆柱反应炉和第二反应炉,用于最终还原粗铁矿石颗粒和中/细铁矿石颗粒; 用于收集夹带在来自第三流化床炉的第一反应炉的废气中的中/细铁矿石颗粒的第三旋风分离器; 以及第四旋风分离器,用于收集夹带在来自第三流化床炉的第二炉的废气中的超细铁矿石颗粒。

    Fluidized bed type reduction apparatus for iron ore particles and method
for reducing iron ore particles using the apparatus
    3.
    发明授权
    Fluidized bed type reduction apparatus for iron ore particles and method for reducing iron ore particles using the apparatus 失效
    用于铁矿石颗粒的流化床型还原装置和使用该装置还原铁矿石颗粒的方法

    公开(公告)号:US5785733A

    公开(公告)日:1998-07-28

    申请号:US702517

    申请日:1996-10-28

    IPC分类号: C21B11/00 C21B13/00 C21B13/14

    摘要: A reduction apparatus and a method for efficient reduction of fine iron ores of wide grain range comprising serially arranged a drying/preheating furnace, a first reducing furnace for prereduction and a second reduction furnace for final reduction, each working with bubbling fluidized bed and being connected each to a cyclone for capturing iron ore dust contained in the exhaust gases, having each a tapered shape smoothly expanded outwards and thus considerably decreasing elutriation of fine particles, increasing the reduction efficiency and enhancing the utilization of the reducing gas.

    摘要翻译: PCT No.PCT / KR95 / 00182 Sec。 371日期1996年10月28日第 102(e)日期1996年10月28日PCT提交1995年12月28日PCT公布。 出版物WO96 / 21045 日期:1996年7月11日一种用于有效还原宽晶粒范围的细铁矿的还原装置和方法,包括串联布置的干燥/预热炉,用于预还原的第一还原炉和用于最终还原的第二还原炉,每个都用起泡 流化床并且各自连接到旋风分离器,用于捕获废气中含有的铁矿石粉尘,每个锥形形状向外平滑地膨胀,从而大大减少细颗粒的淘析,从而提高还原效率并增强还原气体的利用。

    Fluidized bed type reducing system for reducing fine iron ore
    4.
    发明授权
    Fluidized bed type reducing system for reducing fine iron ore 失效
    用于还原细铁矿石的流化床型还原系统

    公开(公告)号:US06224819B1

    公开(公告)日:2001-05-01

    申请号:US09125549

    申请日:1998-08-27

    IPC分类号: C22B110

    摘要: A fluidized bed reducing system for reducing a fine iron ore is disclosed, in which the structure of the fluidized bed reducing furnace is improved such that the coarse iron ore particles are distributed in the lower portion of the fluidized bed within the furnace and the fine iron ore particles are distributed in the upper portion of the fluidized bed. Thus, the average residence times of the particles in the furnace are adjusted differently for different ore sizes, so that the reducing efficiency can be improved, and that the residence time of the reducing gas in the furnace can be extended, thereby improving the degree of gas utilization. The fluidized bed reducing system for reducing a fine iron ore includes: an upper iron ore outlet for discharging fine iron ore particles; a lower iron ore outlet for discharging coarse iron ore particles; a gas distributor installed in a lower portion of a reducing furnace; a gas inlet formed on a lower portion of the reducing furnace for introducing a reducing gas; an iron ore inlet for supplying an iron ore of wide particle size distribution; a circulating duct connected to an upper portion of the reducing furnace for discharging extremely fine iron ore particles together with the reducing gas; a particle capturing device an extremely fine iron ore recycling duct. The fluidized bed reducing furnace includes a cylindrical upper portion and a tapered lower portion, the tapered portion being in a wide-upper-narrow-lower shape.

    摘要翻译: 公开了一种用于还原细铁矿石的流化床还原体系,其中流化床还原炉的结构得到改善,使得粗铁矿石颗粒分布在炉内的流化床的下部,细铁 矿石颗粒分布在流化床的上部。 因此,对于不同的矿石尺寸,对炉中的颗粒的平均停留时间进行不同的调节,从而可以提高还原效率,并且可以延长还原气体在炉中的停留时间,从而提高 天然气利用。 用于还原细铁矿石的流化床还原系统包括:用于排出细铁矿石颗粒的上铁矿石出口; 用于排出粗铁矿石颗粒的下铁矿石出口; 安装在还原炉的下部的气体分配器; 气体入口,形成在所述还原炉的下部,用于引入还原气体; 用于供应宽粒度分布的铁矿石的铁矿石入口; 与还原炉的上部连接的循环管道,用于与还原气体一起排出极细的铁矿石颗粒; 颗粒捕获装置是极细的铁矿石循环管道。 流化床还原炉包括圆柱形上部和锥形下部,锥形部分处于宽 - 上 - 下 - 窄 - 下形状。

    Fluidized bed type reduction apparatus for iron ores and method for
reducing iron ores using the apparatus
    5.
    发明授权
    Fluidized bed type reduction apparatus for iron ores and method for reducing iron ores using the apparatus 失效
    用于铁矿石的流化床型还原装置和使用该装置还原铁矿石的方法

    公开(公告)号:US5762681A

    公开(公告)日:1998-06-09

    申请号:US696973

    申请日:1996-10-28

    摘要: A three-stage, fluidized-bed-type reduction apparatus and a method for using it for reducing fine iron ores of wide size ranges, improving the gas utilization and reduction degree, reducing the residence time of iron ores, and increasing the prereduction rate of reduced iron. The apparatus includes serially arranged a drying/preheating furnace with a first cyclone connected to it, a primary prereduction furnace with a second cyclone connected to it, a secondary high-gas-velocity reduction furnace for finally reducing only a coarse ore portion of the prereduced iron ores at a bubbling fluidized state while carrying over the medium/fine ore portion of the iron ores, a secondary low-gas-velocity reduction furnace for finally reducing the medium/fine ores forming a bubbling fluidized bed thereof, an inner cyclone installed in the secondary low-gas-velocity reduction furnace, and a third cyclone for capturing dusty ores not captured by the inner cyclone.

    摘要翻译: PCT No.PCT / KR95 / 00181 Sec。 371日期1996年10月28日第 102(e)日期1996年10月28日PCT提交1995年12月28日PCT公布。 公开号WO96 / 21044 日期1996年7月11日三级流化床型还原装置及其用于还原大范围铁矿石的方法,提高气体利用和还原度,减少铁矿石的停留时间,以及 增加还原铁的预还原率。 该装置包括串联地布置有与其连接的第一旋流器的干燥/预热炉,具有与其连接的第二旋风分离器的初级预还原炉,用于最终仅还原预还原的粗矿石部分的二次高速气体还原炉 铁矿石在鼓泡流化状态下,同时承载铁矿石的中/细矿石部分,二次低气速降低炉,用于最终还原形成其起泡流化床的中/细矿石,内旋风安装在 第二低速气体还原炉和用于捕获未被内旋风分离器捕获的多尘的矿石的第三旋风分离器。

    2-stage fluidized bed furnace for pre-reducing fine iron ore and method
for pre-reducing fine iron ore using the furnace
    6.
    发明授权
    2-stage fluidized bed furnace for pre-reducing fine iron ore and method for pre-reducing fine iron ore using the furnace 失效
    用于预还原精炼铁矿石的2级流化床炉和使用该炉预还原精细铁矿石的方法

    公开(公告)号:US5919281A

    公开(公告)日:1999-07-06

    申请号:US894670

    申请日:1997-08-25

    摘要: The 2-stage fluidized bed furnace for pre-reducing a fine iron ore comprises a first stage fluidized bed furnace for receiving the fine iron ore from a storage hopper, discharging medium/small particle size iron ore to the upper part thereof, and reducing a coarse particle size iron ore while forming a bubbling fluidized bed; a second stage fluidized bed furnace for receiving the medium/small particle size iron ore discharged from the upper part of the first stage and reducing it while forming a turbulent fluidized bed; and a first hot cyclone for collecting the small particle size iron ore contained in the discharged gas from the second stage fluidized bed furnace, the first stage furnace being formed in an upper-narrowed, lower-expanded shape and comprising a narrow, upper portion, a transitional, slanted portion and a wide, lower portion, the second stage furnace being in an upper-expanded, lower-narrowed shape and comprising a wide, upper portion, a transitional, slanted portion and a narrow, lower portion.

    摘要翻译: PCT No.PCT / KR96 / 00249 Sec。 371日期1997年8月25日第 102(e)日期1997年8月25日PCT 1996年12月26日PCT公布。 公开号WO97 / 23655 日期1997年7月3日用于预还原精细铁矿石的2级流化床炉包括用于从储料斗接收细铁矿石的第一级流化床炉,将中等/小粒径铁矿石排放到上部 并且在形成鼓泡流化床的同时还原粗颗粒铁矿石; 第二级流化床炉,用于接收从第一阶段上部排出的中/小粒度铁矿石,并在形成湍流流化床的同时还原; 以及第一热旋风分离器,用于收集来自第二级流化床炉的排放气体中所含的小粒度铁矿石,第一级炉形成为上部变窄的较低膨胀形状,并且包括窄的上部, 过渡的倾斜部分和宽的下部,第二级炉处于上部膨胀的下部变窄的形状,并且包括宽的上部,过渡的倾斜部分和较窄的下部。

    Smelting-reduction apparatus and method for producing molten pig iron
using the smelting reduction apparatus
    7.
    发明授权
    Smelting-reduction apparatus and method for producing molten pig iron using the smelting reduction apparatus 有权
    冶炼还原装置的冶炼还原装置及其制造方法

    公开(公告)号:US6086653A

    公开(公告)日:2000-07-11

    申请号:US125489

    申请日:1998-08-19

    摘要: A smelting reduction apparatus and a method for producing molten pig iron using the smelting reduction apparatus are disclosed. The molten pig iron is produced by using iron ore, sintered ore or iron pellets, so that the reduced iron discharge operation from a pre-reducing furnace to a melter-gasifier would not give any influence to the operation of the pre-reducing furnace. An iron ore is pre-reduced at a pre-reducing furnace by utilizing a reducing off-gas which is produced from a melter-gasifier. The pre-reduced iron ore is melted and reduced at the melter-gasifier. The reducing gas which is discharged from the melter-gasifier is supplied through an ascending duct and a cyclone into the pre-reducing furnace. The fine iron ore which is collected at the cyclone is spouted through a recycling device and a melter-burner into the melter-gasifier. A part of the reducing off-gas which has passed through the cyclone is supplied through a ventury scrubber, a compressor and a compressed gas circulating duct into the ascending duct. In such an apparatus, a reduced iron discharge device is installed between the pre-reducing furnace and the melter-gasifier.

    摘要翻译: PCT No.PCT / KR97 / 00274 Sec。 371日期1998年8月19日 102(e)1998年8月19日PCT 1997年12月19日PCT PCT。 公开号WO98 / 28448 日期1998年7月2日公开了一种熔融还原装置和使用该熔融还原装置生产熔融生铁的方法。 熔炼的生铁通过使用铁矿石,烧结矿或铁丸制成,使得从预还原炉到熔炉 - 气化炉的还原铁排放操作不会对预还原炉的操作产生任何影响。 铁矿石在预还原炉中通过利用由熔炉 - 气化器产生的还原废气预还原。 预还原的铁矿石在熔炉 - 气化器处熔化并还原。 从熔炉 - 气化器排出的还原气体通过上升管道和旋风分离器供给到预还原炉中。 在旋风分离器收集的细铁矿石通过回收装置和熔炉燃烧器喷射到熔炉 - 气化器中。 已经通过旋风分离器的一部分还原废气通过排气净化器,压缩机和压缩气体循环管道供应到上升管道中。 在这种装置中,还原铁排放装置安装在预还原炉和熔炉 - 气化器之间。

    Method for injecting fine iron ore in smelting reducing process
    8.
    发明授权
    Method for injecting fine iron ore in smelting reducing process 失效
    炼铁精矿注铁方法

    公开(公告)号:US5989309A

    公开(公告)日:1999-11-23

    申请号:US894852

    申请日:1997-08-28

    IPC分类号: C21B11/00 C21B13/00 C21B13/14

    摘要: A method for injecting fine iron ore in a smelting reducing process is disclosed, in which the carrier gas for the iron ore is the discharge gas from a melter gasifier without the need of separate carrier gas. It includes the steps of pre-reducing iron ore in a pre-reduction furnace, melting and reducing it in the melter gasifier, supplying the discharge gas from the melter gasifier through an ascending tube to a cyclone and to said pre-reduction furnace, directing the cooled and cleaned fine iron ore through a recycling system and a melting burner into the melter gasifier. A part of the discharge gas is supplied through a venturi scrubber, a first compressor and a circulating tube into an ascending tube. A part of the compressed gas circulating through the tube is recompressed by means of a second compressor and fine iron ore from a stored source is injected into ascending the tube by the recompressed gas by means of a pneumatic fine iron ore conveying system.

    摘要翻译: PCT No.PCT / KR96 / 00245 Sec。 371日期1997年8月28日 102(e)日期1997年8月28日PCT提交1996年12月24日PCT公布。 公开号WO97 / 24462 日本1997年7月10日公开了一种在冶炼还原工艺中注入细铁矿石的方法,其中用于铁矿石的载气是来自熔融气化器的排出气体,而不需要分离的载气。 它包括在预还原炉中预还原铁矿石的步骤,在熔化炉气化器中熔化和还原铁矿,将来自熔化炉气化器的排出气体通过上升管提供到旋风分离器和所述预还原炉,引导 冷却和清洁的细铁矿石通过回收系统和熔化燃烧器进入熔化炉气化炉。 放电气体的一部分通过文丘里洗涤器,第一压缩机和循环管供给到上升管中。 通过管道循环的一部分压缩气体通过第二压缩机被再压缩,并且通过气动细铁矿石输送系统将来自储存源的细铁矿石通过再压缩气体注入上管。