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公开(公告)号：US20240052442A1
公开(公告)日：2024-02-15
申请号：US18250928
申请日：2021-10-28
发明人： Robert MILLNER , Norbert REIN , Johann WURM
CPC分类号： C21B13/14 , C21B13/0073 , C21C5/5205
摘要： A process for steel production that includes:
production of sponge iron from iron oxide-containing starting material by direct reduction with reduction gas, wherein the reduction gas has at least 20% by volume of hydrogen H2,
and production of an iron melt having a carbon content of 1-5% by mass from the sponge iron.
Sponge iron is subjected to a treatment that includes:
energy input and addition of additives to produce a melt and a slag, wherein the energy input is effected substantially from electricity and wherein the slag has a basicity B2 of less than 1.3, preferably less than 1.25, particularly preferably less than 1.2,
adjustment of the carbon content in the melt,
reduction of at least a sub-amount of the iron oxides present in the sponge iron
The slag is separated during and/or after the treatment.-
公开(公告)号：US20230295755A1
公开(公告)日：2023-09-21
申请号：US17697850
申请日：2022-03-17
CPC分类号： C21B13/04 , C21B13/14 , C21B13/0073 , C21B13/02 , C21B2300/02
摘要： A modular direct reduction system for producing direct reduced iron (DRI) includes a reformer system which receives a flow of feed gas and which discharges a flow of reducing gas, the reformer system including a plurality of separate reformer modules connected together and wherein each reformer module includes a reformer vessel including an internal chamber, a reactor tube extending through the internal chamber of the reformer vessel and containing a catalyst configured to react with the feed gas received by the reactor tube to form the reducing gas, and a burner to burn a fuel gas to heat the reactor tube, and a furnace system connected to the reformer system and including a furnace having a first inlet which receives an iron ore, a second inlet which receives the reducing gas from the reformer system to form the DRI, and an outlet which discharges the DRI.
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公开(公告)号：US20230160028A1
公开(公告)日：2023-05-25
申请号：US17922842
申请日：2021-05-03
CPC分类号： C21B13/0073 , C21B13/004 , C21B13/02 , C21B13/146 , C25B1/04 , C21B2100/24 , C21B2100/282 , C21B2100/66
摘要： The present disclosure relates to a process for the production of carburized sponge iron. The process comprises the steps of reducing iron ore pellets using a carbon-lean reducing gas in a direct reduction shaft reactor to provide a sponge iron intermediate; transferring the sponge iron intermediate to a carburization unit; and carburizing the sponge iron intermediate in the carburization unit using a carburizing gas to provide carburized sponge iron. The disclosure further relates to a system for the production of carburized sponge iron, a carburized sponge iron produced by the aforementioned process, and a sponge iron intermediate obtained during the production of such a carburized sponge iron.
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公开(公告)号：US20220002826A1
公开(公告)日：2022-01-06
申请号：US17294197
申请日：2019-11-01
申请人： POSCO
发明人： Chang Kuk KO , Myoung Kyun SHIN
摘要： A device for manufacturing molten iron is provided. The device for manufacturing the molten iron includes a multi-stage fluidized reduction furnace for reducing a powdered iron ore including hematite and limonite, a melting gas furnace connected to the fluidized reduction furnace through an ore conduit and a gas conduit, a fluidized bed oxidation furnace for oxidizing magnetite to be converted into hematite through steam provided from the fluidized reduction furnace, and a hydrogen processing unit for processing hydrogen generated by the oxidation reaction of magnetite in the fluidized bed oxidation furnace.
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5.发明申请公开(公告)号：US20210301359A1
公开(公告)日：2021-09-30
申请号：US17209706
申请日：2021-03-23
摘要： A direct reduction process comprises providing a shaft furnace of a direct reduction plant to reduce iron oxide with reducing gas; providing a direct reduced iron melting furnace; and coupling a discharge chute between a discharge exit of the direct reduced shaft furnace and an inlet of the direct reduced iron melting furnace; wherein direct reduced iron and the reducing gas from the shaft furnace flow through the discharge chute and the reducing gas controls the melting furnace atmosphere to reducing environment.
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公开(公告)号：US10543491B2
公开(公告)日：2020-01-28
申请号：US15991690
申请日：2018-05-29
发明人： Yuexin Han , Yanjun Li , Shuai Yuan , Peng Gao , Yongsheng Sun , Wenbo Li
摘要： The invention discloses a multi-stage suspension magnetizing roasting-magnetic separation system and method for refractory iron ore, which belongs to the field of mineral processing technology. This system comprises multistage suspension preheater, multistage suspension oxidizer, multistage suspension redactor, on-line grade analyzer, ore-like splitter, magnetic separator, dust remover, roots blower and other components and connection modes. The refractory iron ore treated by the present method can be produced to homogeneous magnetite or maghemite accurately, and through magnetic separation, on-line grade analyzer detection and ore-like splitter, the concentrate powder which reach the set grade can be obtained, and the unqualified ore powder enters the next stage of oxidation-reduction-magnetic separation-split treatment. Through the present system and method, products with different roasting quality can be obtained, and can avoid the phenomenon of over burning or under burning occurring in the past process and equipment.
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公开(公告)号：US10260117B2
公开(公告)日：2019-04-16
申请号：US14905680
申请日：2014-07-22
发明人： Ahmed H. Al-Nazr
摘要： In one aspect, the invention relates to a system for producing direct reduced iron wherein a portion of the top gas from a first module for reducing iron oxide by a direct reduction process is utilized as fuel in the thermal equipment of a second module for reducing iron oxide by a direct reduction process, wherein the second module comprises a process gas heating unit. In various aspects, the thermal equipment of the second module is a reducing gas heater and/or a steam boiler. In a further aspect, the top gas from multiple instances of the first module can be utilized collectively as fuel in the thermal equipment of the second module. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
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8.发明授权公开(公告)号：US09470456B2
公开(公告)日：2016-10-18
申请号：US14118849
申请日：2012-05-09
申请人： Georg Aichinger , Franz Berner , Thomas Eder , Robert Millner , Jan-Friedemann Plaul , Norbert Rein , Andreas Scherney , Kurt Wieder , Johann Wurm
发明人： Georg Aichinger , Franz Berner , Thomas Eder , Robert Millner , Jan-Friedemann Plaul , Norbert Rein , Andreas Scherney , Kurt Wieder , Johann Wurm
CPC分类号： F27D3/0025 , C21B13/002 , C21B13/0066 , C21B13/143 , F27D3/0026 , F27D3/08 , F27D19/00 , F27D21/0035
摘要： A melter gasifier of a smelting reduction installation is charged by bringing together coal -containing material in lump form and iron carrier material (which may be hot) before and/or while they enter the melter gasifier. The ratio of the combined amounts of iron carrier material and coal-containing material in lump form is variable. The combined amounts of iron carrier material and coal-containing material in lump form are distributed over the cross section of the melter gasifier by a dynamic distributing device, and the ratio of the combined amounts of the iron carrier material and coal-containing material in lump form is set depending on the position of the dynamic distributing device.
摘要翻译： 通过在进入熔化炉气化器之前和/或进料期间将包含块状的含煤材料和铁载体材料（其可能是热的）聚集在一起，进行熔融还原装置的熔化炉气化炉。 铁载体材料和含煤材料的组合量的比例是可变的。 铁载体材料和块状的含煤材料的组合量通过动态分配装置分布在熔化器气化器的横截面上，并且铁载体材料和含煤材料的组合量在块中的比例 形式根据动态分配装置的位置而设定。
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9.发明授权Combined pre-treatment process for enabling feed material to be charged in direct reduction processes 有权组合的预处理工艺，用于使饲料在直接还原过程中充电公开(公告)号：US09347109B2
公开(公告)日：2016-05-24
申请号：US10789694
申请日：2004-02-27
CPC分类号： C21B13/14 , C21B13/02 , C21B2100/02 , C21B2100/04 , C21B2100/22 , C21B2100/26 , C21B2100/44 , C21B2100/66 , C22B1/00 , C22B5/12 , Y02P10/136 , Y02P10/265 , Y02P10/283
摘要： An improved method and apparatus for pretreatment of solid lump feed material for gas and pellet/lump-based direct reduction processes, by initially storing the lump feed in stockpiles for stress release, followed by pre-drying the feed material prior to charging into the reduction furnace and finally increasing the average temperature of the reduction furnace, in order to reduce the amount of reduction at low temperatures, thereby minimizing the formation of fines within the furnace.
摘要翻译： 一种用于预处理用于气体和颗粒/块状直接还原方法的固体块状进料的改进方法和装置，通过最初将块状进料储存在储存中用于应力释放，随后在进料到还原之前预干燥进料 并最终提高还原炉的平均温度，以减少在低温下的还原量，从而最小化炉内细粉的形成。
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10.发明申请METHOD AND DEVICE FOR INTRODUCING FINE PARTICLE-SHAPED MATERIAL INTO THE FLUIDISED BED OF A FLUIDISED BED REDUCTION UNIT 有权用于将精细粒状材料引入流化床减少单元的流化床的方法和装置公开(公告)号：US20150135899A1
公开(公告)日：2015-05-21
申请号：US14401461
申请日：2013-04-04
CPC分类号： C21B13/0033 , C21B7/002 , C21B7/22 , C21B11/00 , C21B13/0013 , C21B13/0026 , C21B13/023 , C21B13/14 , C21B13/143 , C21B2100/282 , C22B1/14 , F27B15/14 , F27B15/18 , F27D1/18 , F27D3/18 , Y02P10/122 , Y02P10/126 , Y02P10/128 , Y02P10/136 , Y02P10/143
摘要： A method for introducing fine particulate material (4) of ferruginous particles into a fluidized bed reduction unit (1) having a fluidized bed (24), wherein the temperature in the fluidized bed (24) is more than 300° C., and wherein the fine particulate material (4) is introduced directly into the fluidized bed (24) and/or into a free space (25) above the fluidized bed (24) by means of a burner (2). The method may be used for producing liquid pig iron (17) or liquid steel precursor products (18) by a smelting reduction process in a smelting reduction unit (22).
摘要翻译： 一种用于将细小颗粒材料（4）引入具有流化床（24）的流化床还原单元（1）中的方法，其中流化床（24）中的温度大于300℃，其中 细颗粒材料（4）通过燃烧器（2）直接引入流化床（24）和/或流化床（24）上方的自由空间（25）中。 该方法可以通过冶炼还原单元（22）中的熔融还原方法用于生产液体生铁（17）或液态钢前体产物（18）。
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