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    Method for the heat treatment of iron ore lumps in a reduction system
    1.
    发明授权
    Method for the heat treatment of iron ore lumps in a reduction system 有权
    还原体系中铁矿石块的热处理方法

    公开(公告)号：US06395056B1

    公开(公告)日：2002-05-28

    申请号：US09368378

    申请日：1999-08-04

    申请人： Juan A. Villarreal-Trevino ,  Jose María Eloy Aparicio-Arranz ,  Ricardo Viramontes-Brown ,  Juan Celada-Gonzalez ,  Raul Gerardo Quintero-Flores ,  Roberto Octaviano Flores-Serrano

    发明人： Juan A. Villarreal-Trevino ,  Jose María Eloy Aparicio-Arranz ,  Ricardo Viramontes-Brown ,  Juan Celada-Gonzalez ,  Raul Gerardo Quintero-Flores ,  Roberto Octaviano Flores-Serrano

    IPC分类号： C21B1314

    CPC分类号： C21B13/0073 ,  C21B13/0033 ,  C21B13/029 ,  C21B2100/282 ,  C21B2100/64 ,  C21B2100/66 ,  Y02P10/122 ,  Y02P10/126 ,  Y02P10/136

    摘要： A method and apparatus for the production of prereduced iron ore, DRI, sponge iron or the like by the gaseous reduction of iron-oxide containing particles in a reduction system which comprises a preheating device for the iron ore particles. The preheating device preserves the strength of the iron ore particles through the reduction system by preheating the particles with non-reducing (or preferably oxidizing) gas, whereby the DRI or like material produced is stronger than if it were processed in a reduction reactor without said preheating device. The invention thereby avoids sticking and fines production problems which some iron ores cause in the reduction reactor. The preheating device also produces other advantages in the reduction system as, for example, that the reducing gas reaches a higher degree of oxidation in the reduction reactor whereby the productivity of the reduction system increases as a result of the decreased amount of reducing gas as well as the decreased residence time required. A further advantage produced by the invention is that the recycled reducing gas can be preheated by heat-exchange with the gas stream effluent from the reduction reactor at a higher temperature as a result of the preheating of the iron ore particles.

    摘要翻译： 一种用于通过在还原体系中气体还原含氧化铁的颗粒来生产预还原铁矿石，DRI，海绵铁等的方法和装置，其包括用于铁矿石颗粒的预热装置。 预热装置通过使用非还原（或优选氧化）气体预热颗粒，通过还原体系保持铁矿石颗粒的强度，由此产生的DRI或类似材料比在还原反应器中加工而不具有所述 预热装置 因此，本发明避免了还原反应器中一些铁矿石引起的粘附和细粉生产问题。 预热装置还在还原系统中产生其它优点，例如，还原气体在还原反应器中达到较高程度的氧化，由此还原系统的生产率由于还原气体的量的减少而增加 因为所需的停留时间减少。 本发明产生的另一个优点是可以通过与铁矿石颗粒的预热结果在更高的温度下与来自还原反应器的气流流出物进行热交换来再循环的还原气体。

    Apparatus for producing direct reduced iron with a controlled amount of carbon
    2.
    发明授权
    Apparatus for producing direct reduced iron with a controlled amount of carbon 有权
    用于生产具有受控量碳的直接还原铁的设备

    公开(公告)号：US6039916A

    公开(公告)日：2000-03-21

    申请号：US175396

    申请日：1998-10-19

    申请人： Juan Celada-Gonzalez ,  Raul Gerardo Quintero-Flores ,  Ricardo Viramontes-Brown ,  Roberto Octaviano Flores-Serrano

    发明人： Juan Celada-Gonzalez ,  Raul Gerardo Quintero-Flores ,  Ricardo Viramontes-Brown ,  Roberto Octaviano Flores-Serrano

    IPC分类号： C21B13/00 ,  C21B13/02

    CPC分类号： C21B13/0033 ,  C21B13/0073 ,  Y02P10/122 ,  Y02P10/128 ,  Y02P10/136 ,  Y02P10/143

    摘要： Method and apparatus for the production of prereduced iron ore, Direct Reduced Iron (DRI), or the like, in an ironmaking plant wherein the reducing gas utilized in the chemical reduction of iron oxides is generated from natural gas within the reduction reactor system by reforming the hydrocarbons with such oxidants as water and oxygen inside the reduction reactor which under steady state conditions contains metallic iron which acts as a reformation catalyst. The amount of carbon in the DRI can be reliably controlled by modifying the relative amounts of water, carbon dioxide and oxygen in the composition of the reducing gas fed to the reduction reactor. The amount of carbon in the DRI is controlled by the amount of water in the reducing gas fed to the reduction reactor while the addition of oxygen provides the energy necessary for such DRI carburization.

    摘要翻译： 在炼铁厂中用于生产预还原铁矿石，直接还原铁（DRI）等的方法和装置，其中用于化学还原铁氧化物的还原气体由还原反应器系统内的天然气通过重整 在还原反应器内具有水和氧的氧化剂的烃在稳态条件下含有用作改性催化剂的金属铁。 通过改变供给到还原反应器的还原气体的组成中的水，二氧化碳和氧气的相对量，可以可靠地控制DRI中的碳量。 DRI中的碳的量由供给到还原反应器的还原气体中的水量控制，而加入氧气则提供了这种DRI渗碳所需的能量。

    Method for producing direct reduced iron with a controlled amount of carbon
    3.
    发明授权
    Method for producing direct reduced iron with a controlled amount of carbon 失效
    直接还原铁的生产方法

    公开(公告)号：US5858057A

    公开(公告)日：1999-01-12

    申请号：US719930

    申请日：1996-09-25

    申请人： Juan Celada-Gonzalez ,  Raul Gerardo Quintero-Flores ,  Ricardo Viramontes-Brown ,  Roberto Octaviano Flores-Serrano

    发明人： Juan Celada-Gonzalez ,  Raul Gerardo Quintero-Flores ,  Ricardo Viramontes-Brown ,  Roberto Octaviano Flores-Serrano

    IPC分类号： C21B13/02 ,  C21B13/00

    CPC分类号： C21B13/0073 ,  C21B13/0033 ,  Y02P10/122 ,  Y02P10/128 ,  Y02P10/136 ,  Y02P10/143

    摘要： Method and apparatus for the production of prereduced iron ore, Direct Reduced Iron (DRI), or the like, in an ironmaking plant wherein the reducing gas utilized in the chemical reduction of iron oxides is generated from natural gas within the reduction reactor system by reforming the hydrocarbons with such oxidants as water and oxygen inside the reduction reactor which under steady state conditions contains metallic iron which acts as a reformation catalyst. The amount of carbon in the DRI can be reliably controlled by modifyng the relative amounts of water, carbon dioxide and oxygen in the composition of the reducing gas fed to the reduction reactor. The amount of carbon in the DRI is controlled by the amount of water in the reducing gas fed to the reduction reactor while the addition of oxygen provides the energy necessary for such DRI carburization.

    摘要翻译： 在炼铁厂中用于生产预还原铁矿石，直接还原铁（DRI）等的方法和装置，其中用于化学还原铁氧化物的还原气体由还原反应器系统内的天然气通过重整 在还原反应器内具有水和氧的氧化剂的烃在稳态条件下含有用作改性催化剂的金属铁。 通过改变供给到还原反应器的还原气体的组成中的水，二氧化碳和氧气的相对量，可以可靠地控制DRI中的碳量。 DRI中的碳的量由供给到还原反应器的还原气体中的水量控制，而加入氧气则提供了这种DRI渗碳所需的能量。