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

    公开(公告)号：EP2024521A2

    公开(公告)日：2009-02-18

    申请号：EP07734425.7

    申请日：2007-04-23

    申请人： HYL Technologies, S.A. de C.V.

    发明人： ZENDEJAS-MARTINEZ, Eugenio

    IPC分类号： C21B13/00

    CPC分类号： C21B13/02 ,  C21B13/0086 ,  C21B13/029 ,  C21B2100/22 ,  C21B2100/44 ,  Y02P10/122 ,  Y02P10/126 ,  Y02P10/128 ,  Y02P10/136 ,  Y02P10/143

    摘要： A direct reduction process for producing direct reduced iron (DRI) in a reduction reactor having a reduction zone for reducing iron-oxides-containing particles, such as iron ore pellets, to DRI by reaction of said iron oxides with a high temperature reducing gas, and a cooling zone for lowering the temperature of the DRI produced in said reduction zone, wherein a stream of cooling gas, usually natural gas, is circulated through said cooling zone, a portion of said cooling gas is withdrawn from the cooling zone, cooled and cleaned in a gas cooler and a portion of the cooled gas is recycled to said reduction zone by means of an ejector utilizing the high-pressure natural gas make-up feed as the ejector's motive fluid. Using an ejector for recycling the cooling gas instead of using a mechanical compressor provides significant savings in electricity and in capital, operational and maintenance costs. A direct reduction plant having a DRI cooling zone which uses at least one ejector in recycling at least a portion of cooling gas to the cooling zone.

    摘要翻译： 一种用于通过所述铁氧化物与高温还原气体的反应在还原反应器中生产直接还原铁（DRI）的直接还原方法，所述还原反应器具有用于还原含铁氧化物颗粒例如铁矿石颗粒至DRI的还原区， 以及用于降低在所述还原区中产生的DRI的温度的冷却区，其中通过所述冷却区循环冷却气体（通常为天然气）流，所述冷却气体的一部分从所述冷却区域排出，冷却并且 在气体冷却器中清洁，并且通过使用高压天然气补充进料作为喷射器的运动流体的喷射器将一部分冷却的气体再循环到所述还原区。 使用喷射器回收冷却气体而不是使用机械压缩机可大大节省电力以及资金，运营和维护成本。 具有DRI冷却区域的直接还原装置，其使用至少一个喷射器将至少一部分冷却气体再循环到冷却区域。

    METHOD AND APPARATUS FOR PRODUCING DIRECT REDUCED IRON
    8.
    发明授权
    METHOD AND APPARATUS FOR PRODUCING DIRECT REDUCED IRON 有权
    生产直接还原铁的方法和设备

    公开(公告)号：EP2024521B1

    公开(公告)日：2018-01-03

    申请号：EP07734425.7

    申请日：2007-04-23

    申请人： HYL Technologies, S.A. de C.V.

    发明人： ZENDEJAS-MARTINEZ, Eugenio

    IPC分类号： C21B13/00 ,  C21B13/02

    CPC分类号： C21B13/02 ,  C21B13/0086 ,  C21B13/029 ,  C21B2100/22 ,  C21B2100/44 ,  Y02P10/122 ,  Y02P10/126 ,  Y02P10/128 ,  Y02P10/136 ,  Y02P10/143

    摘要： A direct reduction process for producing direct reduced iron (DRI) in a reduction reactor having a reduction zone for reducing iron-oxides-containing particles, such as iron ore pellets, to DRI by reaction of said iron oxides with a high temperature reducing gas, and a cooling zone for lowering the temperature of the DRI produced in said reduction zone, wherein a stream of cooling gas, usually natural gas, is circulated through said cooling zone, a portion of said cooling gas is withdrawn from the cooling zone, cooled and cleaned in a gas cooler and a portion of the cooled gas is recycled to said reduction zone by means of an ejector utilizing the high-pressure natural gas make-up feed as the ejector's motive fluid. Using an ejector for recycling the cooling gas instead of using a mechanical compressor provides significant savings in electricity and in capital, operational and maintenance costs. A direct reduction plant having a DRI cooling zone which uses at least one ejector in recycling at least a portion of cooling gas to the cooling zone.

    METHOD AND APPARATUS FOR PRODUCTION OF DIRECT REDUCED IRON (DRI) UTILIZING COKE OVEN GAS
    9.
    发明公开
    METHOD AND APPARATUS FOR PRODUCTION OF DIRECT REDUCED IRON (DRI) UTILIZING COKE OVEN GAS 审中-公开
    对任何直接的制造方法和设备还原铁使用焦炉煤气

    公开(公告)号：EP2794932A2

    公开(公告)日：2014-10-29

    申请号：EP12848748.5

    申请日：2012-12-21

    申请人： HYL Technologies, S.A. de C.V. ,  Danieli & C. Officine Meccaniche SpA

    发明人： MARTINIS, Alessandro ,  BECERRA-NOVOA, Jorge-octavio ,  CONDOSTA, Michele ,  ZENDEJAS-MARTINEZ, Eugenio

    IPC分类号： C21B13/00 ,  C21B13/02 ,  C10K1/00 ,  C01B3/36 ,  C10B43/10 ,  C10G9/16 ,  F27D25/00

    CPC分类号： C21B13/0073 ,  C01B2203/0227 ,  C01B2203/025 ,  C10G9/16 ,  C10G75/00 ,  C21B13/02 ,  C21B13/029 ,  C21B2100/66 ,  F27D25/00 ,  F27D25/008 ,  Y02P10/122 ,  Y02P10/126 ,  Y02P10/128 ,  Y02P10/136 ,  Y02P10/265 ,  Y02P10/283

    摘要： Direct reduction process and plant for producing DRI comprising a reduction reactor and at least one reducing gas heater typically comprising a convective heating section and a radiant heating section for raising the reducing gas temperature to a level adequate for iron oxides reduction to metallic iron, typically above 850° C., wherein the reducing gas fed to the reduction reactor comprises a stream of reducing gas recycled from the reduction reactor and a make-up stream of coke oven gas containing carbon compounds which may form carbon deposits in the heating path of said heater, namely BTX and other complex carbon compounds. The heater is provided with means for feeding oxidizing agents, for example steam, steam and air and/or oxygen at predetermined heating tubes successively for eliminating the carbon deposits which may form inside the heating tubes of said heater without interrupting the operation of the plant. The make-up stream of cold COG can be combined with the recycled gas at a point in the gas heating path of the heater where the tubes have a skin wall temperature of at least 700° C., or when the mixture of recycled gas and COG is at a temperature above 700° C. for minimizing clogging or fouling of heating equipment.

    摘要翻译： 直接还原过程和工厂用于生产DRI包括还原反应器和至少一种还原气体加热器一般包括一个对流加热段和用于提高还原气的温度，以足够的铁的氧化物还原成金属铁的水平的辐射加热段，典型地高于 850℃，进料worin到还原反应器的还原气体包括从所述还原反应器和其可形成的碳沉积物在所述加热器的加热路径焦炉气的含碳化合物的补充流再循环还原气体的流 即BTX和其它复杂的碳化合物。 加热器被用于按预定的加热管连续供给氧化剂，例如蒸汽，蒸汽和空气和/或氧气用于消除碳沉积物可形成所述加热器的加热管内，而不会中断的计划手术的装置。 冷COG的补充料流可以与再循环气体在加热器的气体加热通路，其中管具有壁皮肤温度至少700℃，或者当再循环气体的混合物和一个点相结合 COG是在高于700℃的温度下最小化堵塞或加热设备结垢。