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    • 3. 发明申请
    • PROCESS FOR PRODUCTION OF DIRECT REDUCED IRON
    • 生产直接还原铁的工艺
    • US20110247457A1
    • 2011-10-13
    • US13122729
    • 2009-09-22
    • Klaus KnopSten Ångström
    • Klaus KnopSten Ångström
    • C21B3/02
    • C21B13/0046B01D2257/504C21B13/0073C21B13/02C21B2100/24C21B2100/26C21B2100/282C21B2100/284C21B2100/44C21B2100/66Y02P10/122Y02P10/126Y02P10/128Y02P10/136Y02P10/143
    • The present invention relates to a process for the direct reduction of iron ore performed by means of a plant comprising a gravitational furnace (2) having at least one iron ore reduction zone (8) in the upper part thereof, and at least one carbon deposition zone (9) and one reduced metal product cooling zone (10) in the lower part thereof, and means for feeding a reducing gas mixture into the reactor in correspondence to the with the reduction zone, means for recycle exhaust or reactor off gas from the reactor to syngas and mixing the recycled gas with natural gas to form a reducing gas mixture. According to the invention a in first reformation step (5) unreacted carbon monoxide CO and steam present in the reactor off gas is reformed to carbon dioxide and hydrogen following the water gas shift reaction CO+H20=CO2+H2, in a secondary reformation step the de-watered reactor off gas comprising mainly of carbon dioxide and hydrogen is processed to remove carbon dioxide, and in a third reformation step physical separation of both nitrogen and carbon oxide CO from the reducing syngas is carried out to bring down the levels of CO and any existing other gases in the recycled gas to as low level as possible such that recycled reducing gas is as close to pure hydrogen H2 as possible.
    • 本发明涉及一种通过包括在其上部具有至少一个铁矿还原区(8)的重力炉(2)的植物直接还原铁矿石的方法,以及至少一个碳沉积 区域(9)和其下部的一个还原的金属制品冷却区(10),以及用于将还原气体混合物与还原区相对应地供给到反应器中的装置,用于再循环排出的废气或来自 反应器进行合成气并将再循环气体与天然气混合以形成还原气体混合物。 根据本发明,在第一重整步骤(5)中,在二次重整步骤中,在水煤气变换反应CO + H 2 O = CO 2 + H 2之后,存在于反应器废气中的未反应的一氧化碳CO和蒸汽重整成二氧化碳和氢气 处理主要包含二氧化碳和氢气的脱水反应器废气被处理以除去二氧化碳,并且在第三重整步骤中,进行氮和碳氧化物CO与还原性合成气的物理分离以降低CO的含量 和再循环气体中的任何现有其他气体尽可能低的水平,使得再循环的还原气体尽可能接近纯氢气H2。
    • 6. 发明授权
    • Process for producing and using syngas and recovering methane enricher
gas therefrom
    • 用于生产和使用合成气并从其中回收富含甲烷的气体的方法
    • US4678480A
    • 1987-07-07
    • US790325
    • 1985-10-23
    • Peter HeinrichKlaus KnopFriedbert Rube
    • Peter HeinrichKlaus KnopFriedbert Rube
    • C10J3/54C10J3/46C22B5/12
    • C10J3/54C10J3/463C10K1/02C10K1/04C10J2300/093C10J2300/0959C10J2300/0976C10J2300/1675C10J2300/1884Y10S48/01
    • A process for producing a synthesis gas containing methane and using a reactor having a fuel containing carbon comprises directing gasification gases in a circulation system through a bed of fuel containing carbon to form a synthesis gas containing methane and carbon dioxide. Thereafter, the synthesis gas is cooled in a regenerator and subjected to the gas separation wherein the syngas is subjected to a gas cleansing by means of a pressure change absorption in a gas scrubber to remove most of the methane and carbon dioxide and its water content is increased. The separated gas is then heated and subsequently the portion is returned into the system together with the waste gases and fuel containing carbon. The process includes a 4-pole heater which includes the first heat exchange passage for the syngas which is cooled and a second heat exchange passage for the recirculation of the syngas and is further cooled and passed through a scrubber. The system includes a heater which is arranged after the 4-pole heater which operates the gas and then the gas is passed through a reduction reactor back through a heating element of the regenerator that initially cooled the gas. A portion of the gas is also used to drive a steam turbine and to direct the excess steam from the turbine into the initial reactor which has a fluidized bed of the carbon material such as coal.
    • 一种生产含甲烷的合成气和使用含有碳的燃料的反应器的方法包括将循环系统中的气化气体导引通过含碳燃料床形成含有甲烷和二氧化碳的合成气。 此后,将合成气在再生器中冷却并进行气体分离,其中合成气通过气体洗涤器中的压力变化吸收进行气体净化以除去大部分甲烷和二氧化碳,并且其含水量为 增加。 然后将分离的气体加热,随后将该部分与废气和含碳燃料一起返回到系统中。 该方法包括四极加热器,其包括用于合成气的第一热交换通道,其被冷却,第二热交换通道用于合成气的再循环,并进一步冷却并通过洗涤器。 该系统包括加热器,该加热器布置在操作气体的四极加热器之后,然后气体通过还原反应器返回通过初始冷却气体的再生器的加热元件。 气体的一部分也用于驱动蒸汽轮机并且将来自涡轮机的过量蒸汽引导到具有诸如煤的碳材料的流化床的初始反应器中。
    • 7. 发明授权
    • Method of and device for directly reducing fine-particle ores and
concentrates thereof
    • 直接还原细颗粒矿石及其浓缩物的方法和装置
    • US5545251A
    • 1996-08-13
    • US286164
    • 1994-08-05
    • Klaus Knop
    • Klaus Knop
    • C21B11/02B01J8/18B01J8/26B01J8/36C21B13/00C22B5/14C21B11/00
    • C21B13/0033B01J8/1836B01J8/26B01J8/36C21B13/0026C22B5/14B01J2219/182Y02P10/136Y02P10/216Y02P10/265Y02P10/283
    • The present invention concerns a method of and a device for directly reducing fine-particle ore in a horizontal reactor with an ore-reducing gas and a heat vehicle, also a gas, in a fluidized bed.The ore-reducing vessel itself comprises a horizontal fluidized-bed reactor (1). The ore (F) is blown into it from below. The heated ore-reducing gas (A) is blown into the reactor through oncoming-gas floors (2). The heat needed for the endothermic reaction is supplied to the reactor at different temperatures through heat exchangers (3) and transferred to the bed. Heat is supplied counter to the ore-reducing gas.Fuel (B) in the form of gas is burned with air (C) to make the heat vehicle (D). The ore-reducing gas (A') is heated in downstream heat exchangers (5.1 to 5.3) before arriving in the three sections (1a, 1b, & 1c) of the reactor through the floors.Sponge iron (6) is removed and throat gas (E) extracted from a sponge-collecting section (1d).
    • 本发明涉及一种用于在流化床中用还原气体和热载体(也称为气体)在水平反应器中直接还原微粒矿石的方法和装置。 减矿容器本身包括卧式流化床反应器(1)。 矿石(F)从下方吹入。 加热的矿石还原气体(A)通过迎面而来的地板(2)吹入反应器。 吸热反应所需的热量通过热交换器(3)在不同的温度下供给反应器并转移到床上。 热量与减矿气相反。 气体燃料(B)用空气(C)燃烧以制造热载体(D)。 在下游热交换器(5.1至5.3)中,通过地板到达反应堆的三个部分(1a,1b和1c)之前,将减矿气体(A')加热。 除去海绵铁(6),并从海绵收集部(1d)中提取咽喉气(E)。