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1.发明授权Methods and systems for producing direct reduced iron incorporating a carbon dioxide and steam reformer fed by recovered carbon dioxide 有权用于生产直接还原铁的方法和系统，其包含由回收的二氧化碳进料的二氧化碳和蒸汽重整器公开(公告)号：US09534265B2
公开(公告)日：2017-01-03
申请号：US14570135
申请日：2014-12-15
CPC分类号： C21B13/0073 , C21B13/02 , F27B1/08 , F27B1/16 , F27D17/002 , F27D17/004 , F27D17/008 , Y02P10/122
摘要： Methods and systems for producing direct reduced iron (DRI), comprising: generating a syngas stream in a carbon dioxide (CO2) and steam reformer; and providing the syngas stream to a direct reduction (DR) shaft furnace as a reducing gas stream. The methods and systems also comprise combining the syngas stream with a recycled off-gas stream from the DR shaft furnace to form the reducing gas stream. The methods and systems further comprise removing carbon dioxide (CO2) from the recycled off-gas stream from the DR shaft furnace prior to combining it with the syngas stream to form the reducing gas stream. The methods and systems still further comprise feeding CO2 removed from the recycled off-gas stream from the DR shaft furnace to the CO2 and steam reformer. The methods and systems still further comprise feeding recycled off-gas from the recycled off-gas stream from the DR shaft furnace to the CO2 and steam reformer.
摘要翻译： 用于生产直接还原铁（DRI）的方法和系统，包括：在二氧化碳（CO 2）和蒸气重整器中产生合成气流; 并将合成气流提供给直接还原（DR）竖炉作为还原气流。 所述方法和系统还包括将合成气流与来自DR竖炉的再循环废气流组合以形成还原气流。 所述方法和系统还包括在将其与合成气流组合之前从来自DR竖炉的再循环废气流中除去二氧化碳（CO 2）以形成还原气流。 所述方法和系统还包括将从再循环废气流中除去的CO 2从DR竖炉送入CO 2和蒸汽重整器。 所述方法和系统还包括将来自再循环废气流的再循环废气从DR竖炉送入CO 2和蒸汽重整器。
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公开(公告)号：US06200363B1
公开(公告)日：2001-03-13
申请号：US09415399
申请日：1999-10-08
IPC分类号： C21B1102
CPC分类号： C21B13/0086 , F27D15/0286 , Y02P10/136
摘要： A method and apparatus for discharging cold product or a combination of cold and hot products from a continuous supply of hot direct reduced iron (“DRI”) comprising a product cooler connected to a shaft furnace, with downward movement of the hot DRI and upward concurrent flow of cooling gas through the product cooler. The method and apparatus provides for diverting of hot DRI from an upper portion of the cooler for gravitational transfer to an adjacent storage unit located at a lower elevation than the furnace. The product cooler is situated at a lower height in relation to the furnace, for gravity transfer of a continuous supply of hot DRI through an entry point into the cooler. Cooler provides for cooling gas injection into the lower portion of the cooler, with gas flow upward and counter-current to the hot DRI that descends through the cooler. Recovered cooling gas is scrubbed, cooled, and recycled back for injection into the bottom portion of the cooler. The cooled DRI is removed from the bottom portion of the cooler thereby establishing a gravitational movement of DRI through the cooler. Simultaneous to cooling of the DRI material, separate transfer portions of hot DRI material can be diverted at the top of the cooler with gravitational transfer to one or more adjacent storage units for processing.
摘要翻译： 一种用于从连续供应的直接还原铁（“DRI”）连续供应冷产品或冷热产品的组合的方法和装置，包括连接到竖炉的产品冷却器，热DRI向下运动并向上并发 冷却气流通过产品冷却器。 该方法和装置提供将热DRI从用于重力传递的冷却器的上部转移到位于比炉高的较低高度的相邻存储单元。 产品冷却器位于相对于炉子的较低高度处，用于通过进入冷却器的入口点连续供应热DRI的重力传递。 冷却器用于将冷却气注入冷却器的下部，气体向上流动并与通过冷却器下降的热DRI逆流。 回收的冷却气体被洗涤，冷却并再循环回来以注入冷却器的底部。 将冷却的DRI从冷却器的底部移除，从而建立DRI通过冷却器的重力运动。 在DRI材料冷却的同时，热DRI材料的分开的转移部分可以在冷却器的顶部转向重力传递到一个或多个相邻的存储单元进行处理。
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3.发明申请SYSTEM AND METHOD FOR REDUCING IRON OXIDE TO METALLIC IRON USING COKE OVEN GAS AND OXYGEN STEELMAKING FURNACE GAS 有权使用焦炉火焰和氧化炉燃烧气体将氧化铁还原成金属铁的系统和方法公开(公告)号：US20110277591A1
公开(公告)日：2011-11-17
申请号：US13107013
申请日：2011-05-13
CPC分类号： C21B13/02 , C21B2100/26 , C21B2100/282 , C21B2100/44 , C21B2100/60 , C21B2100/66 , Y02P10/122 , Y02P10/126 , Y02P10/128 , Y02P10/132 , Y02P10/136 , Y02P10/143
摘要： A process for the direct reduction of iron ore when the external source of reductants is one or both of coke oven gas (COG) and basic oxygen furnace gas (BOFG). Carbon dioxide (CO2) is removed from a mixture of shaft furnace off gas, obtained from a conventional direct reduction shaft furnace, and BOFG. This CO2 lean gas is mixed with clean COG, humidified, and heated in an indirect heater. Oxygen (O2) is injected into the heated reducing gas. This hot reducing gas flows to the direct reduction shaft furnace for use. The spent hot reducing gas exits the direct reduction shaft furnace as shaft furnace off gas, produces steam in a waste heat boiler, is cleaned in a cooler scrubber, and is compressed and recycled to join fresh BOFG. A portion of the shaft furnace off gas is sent to the heater burners. The BOFG and COG are also employed for a variety of other purposes in the process.
摘要翻译： 当外部还原剂来源是焦炉煤气（COG）和碱性氧气炉（BOFG）之一或两者时，直接还原铁矿石的方法。 从常规的直接还原轴炉获得的立式炉废气的混合物和BOFG中除去二氧化碳（CO 2）。 将该二氧化碳贫气与干净的COG混合，加湿并在间接加热器中加热。 将氧（O 2）注入加热的还原气体中。 该热还原气体流入直接还原竖炉使用。 废热还原气体从直接还原炉炉出来，作为竖炉废气，在废热锅炉中产生蒸汽，在较冷的洗涤器中进行清洗，并被压缩再循环以加入新鲜的BOFG。 一部分竖炉炉废气被送到加热器燃烧器。 BOFG和COG也用于此过程中的各种其他目的。
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4.发明授权System and method for reducing iron oxide to metallic iron using natural gas 有权使用天然气将氧化铁还原为金属铁的系统和方法公开(公告)号：US09127326B2
公开(公告)日：2015-09-08
申请号：US14069493
申请日：2013-11-01
CPC分类号： C21B5/001 , C21B13/0073 , C21B13/02 , C21B2100/02 , C21B2100/04 , C21B2100/06 , C21B2100/26 , C21B2100/282 , C21B2100/44 , C21B2100/60 , C21B2100/66 , Y02P10/122 , Y02P10/126 , Y02P10/128 , Y02P10/136 , Y02P10/143 , Y02P10/212 , Y02W30/54
摘要： In various exemplary embodiments, the present invention provides systems and methods that can convert clean or raw natural gas, clean or dirty coke oven gas, or the like to reducing gas/syngas suitable for direct reduction with minimal processing or cleaning. Hydrocarbons and the like are converted to H2 and CO. S does not affect the conversion to reducing gas/syngas, but is removed or otherwise cleaned up by the iron bed in the direct reduction shaft furnace. Top gas may be continuously recycled or a once-through approach may be employed.
摘要翻译： 在各种示例性实施例中，本发明提供了可以将洁净或原始天然气，洁净或脏焦炉气体等转换成适当直接还原的还原性气体/合成气的系统和方法，以最少的处理或清洁。 碳氢化合物等转化为H 2，CO不影响对还原性气体/合成气的转化，而是通过直接还原竖炉中的铁床除去或以其它方式清除。 顶部气体可以连续回收，或者可以采用一次通过的方法。
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5.发明申请公开(公告)号：US20130171049A1
公开(公告)日：2013-07-04
申请号：US13768331
申请日：2013-02-15
IPC分类号： B01D53/00
CPC分类号： B01D53/00 , B01D53/1475 , B01D2258/025 , B01J2219/00006 , C01B3/384 , C01B2203/0233 , C01B2203/0238 , C01B2203/0811 , C01B2203/0822 , C01B2203/0827 , C01B2203/0894 , C01B2203/1241 , C01B2203/148 , C01B2203/84 , C01B2203/86 , C21B13/0073 , C21B13/02 , C21B2100/22 , C21B2100/282 , C21B2100/66 , F27D17/004 , Y02C10/06 , Y02P10/122 , Y02P10/126 , Y02P10/132 , Y02P10/136 , Y02P20/128 , Y02P20/152 , Y02P30/30
摘要： A method and apparatus for sequestering carbon dioxide from a waste gas and reusing it as a recycled gas without emissions concerns, including: given a gas source divided into a process gas and a waste gas: mixing the process gas with a hydrocarbon and feeding a resulting feed gas into a reformer for reforming the feed gas and forming a reducing gas; and feeding at least a portion of the waste gas into a carbon dioxide scrubber for removing at least some carbon dioxide from the waste gas and forming a carbon dioxide lean gas that is mixed with the reducing gas. Optionally, the method also includes feeding at least a portion of the waste gas into the carbon dioxide scrubber for removing at least some carbon dioxide from the waste gas and forming a fuel gas after the addition of a hydrocarbon that is fed into the reformer. Optionally, the gas source and the reducing gas are associated with a direct reduction process for converting iron oxide to metallic iron in a reduction furnace that utilizes the reducing gas, optionally after some modification, and produces the gas source.
摘要翻译： 一种用于从废气中隔离二氧化碳并将其再循环使用而不排放考虑的方法和装置，包括：给出分为工艺气体和废气的气源：将工艺气体与烃混合并将所得的 将进料气体引入用于重整进料气体并形成还原气体的重整器中; 并且将至少一部分废气进料到二氧化碳洗涤器中，用于从废气中除去至少一些二氧化碳，并形成与还原气体混合的贫二氧化碳气体。 任选地，该方法还包括将至少一部分废气进料到二氧化碳洗涤器中，用于从废气中除去至少一些二氧化碳，并在加入进料到重整器中的烃之后形成燃料气体。 任选地，气源和还原气体与用于在还原炉中将铁氧化物转化为金属铁的直接还原方法相关联，所述还原炉中任选地在一些改性之后利用还原气体并产生气体源。
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6.发明授权System and method for reducing iron oxide to metallic iron using coke oven gas and oxygen steelmaking furnace gas 有权使用焦炉煤气和氧气炼钢炉气体将铁氧化物还原为金属铁的系统和方法公开(公告)号：US09028585B2
公开(公告)日：2015-05-12
申请号：US13955654
申请日：2013-07-31
CPC分类号： C21B11/02 , C01B2203/025 , C21B13/02 , C21B2100/02 , C21B2100/04 , C21B2100/06 , C21B2100/22 , C21B2100/282 , C21B2100/60 , C21B2100/66 , Y02P10/122 , Y02P10/126 , Y02P10/132 , Y02P10/136 , Y02P20/129
摘要： Novel systems and methods are described for reducing iron oxide to metallic iron in an integrated steel mill or the like that has a coke oven and/or an oxygen steelmaking furnace. More specifically, the present invention relates to novel systems and methods for reducing iron oxide to metallic iron using coke oven gas (COG) or COG and basic oxygen furnace gas (BOFG).
摘要翻译： 在具有焦炉和/或氧气炼钢炉的综合钢厂等中描述了将氧化铁还原为金属铁的新型系统和方法。 更具体地说，本发明涉及使用焦炉煤气（COG）或COG和碱性氧气炉气体（BOFG）还原氧化铁至金属铁的新系统和方法。
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公开(公告)号：US08377417B2
公开(公告)日：2013-02-19
申请号：US12762618
申请日：2010-04-19
CPC分类号： C01B3/384 , B01D53/1475 , B01J2219/00006 , C01B2203/0233 , C01B2203/0238 , C01B2203/0811 , C01B2203/0822 , C01B2203/0827 , C01B2203/0894 , C01B2203/1241 , C01B2203/148 , C01B2203/84 , C01B2203/86 , C21B13/0073 , C21B2100/24 , C21B2100/26 , C21B2100/282 , C21B2100/42 , F27D17/004 , Y02C10/06 , Y02P10/122 , Y02P10/126 , Y02P10/128 , Y02P10/132 , Y02P10/136 , Y02P20/128 , Y02P20/152 , Y02P30/30
摘要： A method and apparatus for sequestering carbon dioxide from a waste gas and reusing it as a recycled gas without emissions concerns, including: given a gas source divided into a process gas and a waste gas: mixing the process gas with a hydrocarbon and feeding a resulting feed gas into a reformer for reforming the feed gas and forming a reducing gas; and feeding at least a portion of the waste gas into a carbon dioxide scrubber for removing at least some carbon dioxide from the waste gas and forming a carbon dioxide lean gas that is mixed with the reducing gas. Optionally, the method also includes feeding at least a portion of the waste gas into the carbon dioxide scrubber for removing at least some carbon dioxide from the waste gas and forming a fuel gas after the addition of a hydrocarbon that is fed into the reformer. Optionally, the gas source and the reducing gas are associated with a direct reduction process for converting iron oxide to metallic iron in a reduction furnace that utilizes the reducing gas, optionally after some modification, and produces the gas source.
摘要翻译： 一种用于从废气中隔离二氧化碳并将其再循环使用而不排放考虑的方法和装置，包括：给出分为工艺气体和废气的气源：将工艺气体与烃混合并将所得的 将进料气体引入用于重整进料气体并形成还原气体的重整器中; 并且将至少一部分废气进料到二氧化碳洗涤器中，用于从废气中除去至少一些二氧化碳，并形成与还原气体混合的贫二氧化碳气体。 任选地，该方法还包括将至少一部分废气进料到二氧化碳洗涤器中，用于从废气中除去至少一些二氧化碳，并在加入进料到重整器中的烃之后形成燃料气体。 任选地，气源和还原气体与用于在还原炉中将铁氧化物转化为金属铁的直接还原方法相关联，所述还原炉中任选地在一些改性之后利用还原气体并产生气体源。
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8.发明授权System and method for reducing iron oxide to metallic iron using coke oven gas and oxygen steelmaking furnace gas 有权使用焦炉煤气和氧气炼钢炉气体将铁氧化物还原为金属铁的系统和方法公开(公告)号：US08685136B2
公开(公告)日：2014-04-01
申请号：US13363044
申请日：2012-01-31
CPC分类号： C21B13/02 , C21B2100/26 , C21B2100/282 , C21B2100/44 , C21B2100/60 , C21B2100/66 , Y02P10/122 , Y02P10/126 , Y02P10/128 , Y02P10/132 , Y02P10/136 , Y02P10/143
摘要： A process for reducing iron oxide to metallic iron using coke oven gas (COG), including: a direct reduction shaft furnace for providing off gas; a COG source for injecting COG into a reducing gas stream including at least a portion of the off gas; and the direct reduction shaft furnace reducing iron oxide to metallic iron using the reducing gas stream and injected COG. The COG has a temperature of about 1,200 degrees C. or greater upon injection. The COG has a CH4 content of between about 2% and about 13%. Preferably, the COG is reformed COG. Optionally, the COG is fresh hot COG. The COG source includes a partial oxidation system. Optionally, the COG source includes a hot oxygen burner.
摘要翻译： 一种使用焦炉煤气（COG）将铁氧化物还原为金属铁的方法，包括：用于提供废气的直接还原竖炉; COG源，用于将COG注入到包含至少一部分废气的还原气流中; 和直接还原竖炉，使用还原气流还原COG，还原氧化铁至金属铁。 COG注射时的温度约为1200摄氏度或更高。 COG的CH 4含量在约2％至约13％之间。 优选地，COG被重整COG。 可选地，COG是新鲜的COG。 COG源包括部分氧化系统。 可选地，COG源包括热氧燃烧器。
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9.发明授权System and method for reducing iron oxide to metallic iron using coke oven gas and oxygen steelmaking furnace gas 有权使用焦炉煤气和氧气炼钢炉气体将铁氧化物还原为金属铁的系统和方法公开(公告)号：US08496730B2
公开(公告)日：2013-07-30
申请号：US13107013
申请日：2011-05-13
IPC分类号： C21B5/06
CPC分类号： C21B13/02 , C21B2100/26 , C21B2100/282 , C21B2100/44 , C21B2100/60 , C21B2100/66 , Y02P10/122 , Y02P10/126 , Y02P10/128 , Y02P10/132 , Y02P10/136 , Y02P10/143
摘要： A process for the direct reduction of iron ore when the external source of reductants is one or both of coke oven gas (COG) and basic oxygen furnace gas (BOFG). Carbon dioxide (CO2) is removed from a mixture of shaft furnace off gas, obtained from a conventional direct reduction shaft furnace, and BOFG. This CO2 lean gas is mixed with clean COG, humidified, and heated in an indirect heater. Oxygen (O2) is injected into the heated reducing gas. This hot reducing gas flows to the direct reduction shaft furnace for use. The spent hot reducing gas exits the direct reduction shaft furnace as shaft furnace off gas, produces steam in a waste heat boiler, is cleaned in a cooler scrubber, and is compressed and recycled to join fresh BOFG. A portion of the shaft furnace off gas is sent to the heater burners. The BOFG and COG are also employed for a variety of other purposes in the process.
摘要翻译： 当外部还原剂来源是焦炉煤气（COG）和碱性氧气炉（BOFG）之一或两者时，直接还原铁矿石的方法。 从常规的直接还原轴炉获得的立式炉废气的混合物和BOFG中除去二氧化碳（CO 2）。 将该二氧化碳贫气与干净的COG混合，加湿并在间接加热器中加热。 将氧（O 2）注入加热的还原气体中。 该热还原气体流入直接还原竖炉使用。 废热还原气体从直接还原炉炉出来，作为竖炉废气，在废热锅炉中产生蒸汽，在较冷的洗涤器中进行清洗，并被压缩再循环以加入新鲜的BOFG。 一部分竖炉炉废气被送到加热器燃烧器。 BOFG和COG也用于此过程中的各种其他目的。
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公开(公告)号：US06506230B2
公开(公告)日：2003-01-14
申请号：US09781816
申请日：2001-02-12
IPC分类号： C21B1300
CPC分类号： C22B5/12 , B01J2219/00058 , B01J2219/00094 , B01J2219/00123 , B01J2219/00155 , B01J2219/00157 , B01J2219/00159 , B01J2219/00164 , C01B3/363 , C01B3/384 , C01B2203/0233 , C01B2203/0255 , C01B2203/0816 , C01B2203/141 , C01B2203/142 , C21B13/0073 , C21B13/02 , C21B2100/64 , Y02P10/136
摘要： An improved method and apparatus for increasing the productivity of a direct reduction process in which iron oxide is reduced to metallized iron by contact with hot reducing gas; comprising the steps of: a) providing a first hot reducing gas consisting essentially of CO and H2; b) providing additional reducing gas by reaction of a gaseous or liquid hydrocarbon fuel with oxygen; c) mixing the first hot reducing gas with the additional reducing gas to form a reducing gas mixture; d) enriching the reducing gas mixture by the addition of a gaseous or liquid hydrocarbon; e) injecting oxygen or oxygen-enriched air into the enriched mixture; and f) introducing the enriched mixture into an associated direct reduction furnace as reducing gas.
摘要翻译： 一种用于提高通过与热还原气体接触将氧化铁还原成金属化铁的直接还原工艺的生产率的改进方法和装置; 包括以下步骤：a）提供基本上由CO和H 2组成的第一热还原气体; b）通过气态或液态烃燃料与氧气的反应提供额外的还原气体; c）将第一热还原气体与另外的还原气体混合以形成还原气体混合物; d）通过加入气态或液态烃来富集还原气体混合物; e）将氧气或富氧空气注入富集的混合物中; 和f）将富集的混合物引入相关的直接还原炉中作为还原气体。
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