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1. 发明授权

US11952638B2 Direct reduction process utilizing hydrogen 有权
公开(公告)号：US11952638B2
公开(公告)日：2024-04-09
申请号：US17029778
申请日：2020-09-23
申请人： Midrex Technologies, Inc.
发明人： Keith Marshall Bastow-Cox , Enrique Jose Cintron , Gregory Darel Hughes
IPC分类号： C21B13/00 , C21B11/02 , C21B13/02
CPC分类号： C21B13/0073 , C21B11/02 , C21B13/02 , C21B2100/22 , C21B2100/44 , C21C2200/00
摘要： A direct reduction method/system, including: adding variable amounts of natural gas, hydrogen, and a carbon-free oxidizing gas to a feed gas stream upstream of a reformer; reforming the feed gas stream in the reformer to form a reformed gas stream, and delivering the reformed gas stream to a shaft furnace, where the reformed gas stream is used to reduce a metallic ore material to a direct reduced metallic material. The feed gas stream includes a top gas stream recycled from the shaft furnace. Optionally, the carbon-free oxidizing gas includes steam and the method further includes controlling a steam flow rate of the steam to maintain a maximum k-factor value of the feed gas stream of 0.74 or lower. Optionally, the variable amount of hydrogen is selected to replace 20-90% of the natural gas by fuel value. The variable amount of hydrogen is selected based upon an available supply of hydrogen.

2. 发明申请

US20220106651A1 Oxygen Injection For Reformer Feed Gas For Direct Reduction Process 有权
公开(公告)号：US20220106651A1
公开(公告)日：2022-04-07
申请号：US17063986
申请日：2020-10-06
申请人： Midrex Technologies, Inc.
发明人： Haruyasu MICHISHITA
IPC分类号： C21B11/02 , F27B1/08 , F23N5/00
摘要： A direct reduction plant is disclosed. The direct reduction plant includes an oxygen injection system, a reformer, and a shaft furnace. The oxygen injection system includes an oxygen injection reactor and a main oxygen burner. The oxygen injection reactor is adapted to receive a gas mixture. The main oxygen burner is adapted to increase a temperature of the gas mixture by burning a mixture of fuel and oxygen fed to the main oxygen burner. The reformer is adapted to reform the gas mixture with the increased temperature. The shaft furnace is adapted to reduce iron ore using the reformed gas mixture.

3. 发明授权

US10488111B2 Metallurgical furnace for producing metallic alloys 有权
公开(公告)号：US10488111B2
公开(公告)日：2019-11-26
申请号：US15537155
申请日：2015-11-09
申请人： TECNORED DESENVOLVIMENTO TECHNOLÓGICO S.A.
发明人： Hermes Joaquim Ferreira Filho , Kleiton Gonçalves Lovati , Luciano Augusto Morais Maia , André Silva da Luz , Geovane Viturino da Silva , Roberto Okada Junior
IPC分类号： F27B1/02 , C21B11/02 , C21B13/02 , F27B1/16
CPC分类号： F27B1/02 , C21B11/02 , C21B13/02 , F27B1/16
摘要： The instant invention relates to a metallurgical furnace, comprising at least one upper stack (1), at least one lower stack (2), at least one fuel feeder positioned substantially between at least one upper stack (1) and the at least one lower stack (2), at least one row of tuyères (3, 4) positioned in at least one of the at least one upper stack (1) and at least one lower stack (2), the at least one row of tuyères (3, 4) providing a fluid communication between the inside of the furnace and the external environment, positioned in at least one of at least one upper stack (1) and at least one lower stack (2), and further comprising at least one permeabilizing fuel column fed through at least one hood (6), placed in the upper stack (1), which extends longitudinally through the furnace.

4. 发明授权

US09951992B2 Metallurgical furnace 有权
公开(公告)号：US09951992B2
公开(公告)日：2018-04-24
申请号：US15107781
申请日：2014-12-22
申请人： Tecnored Desenvolvimento Tecnologico S.A.
发明人： Hermes Joaquim Ferreira Filho , Kleiton Gonçalves Lovati
IPC分类号： F27D7/02 , F27B1/16 , F27B1/02 , F27B1/10 , C21B11/02 , C21B7/16 , F27D99/00 , C21C5/56
CPC分类号： F27B1/16 , C21B7/16 , C21B11/02 , C21C5/56 , F27B1/02 , F27B1/10 , F27D7/02 , F27D99/0033 , Y02P10/136
摘要： The present invention pertains to metallurgical processes and equipment and, more particularly, to a metallurgical furnace capable of operating with a broad range of broad range of raw materials and fuels, including those with high levels of impurities. Accordingly, the metallurgical furnace of the present invention comprises (i) at least an upper tub, (ii) at least a lower tub, (iii) at least a fuel feeder positioned substantially between the at least an upper tub and the at least a lower tub, (iv) at least a row of tuyeres positioned on at least one of at least an upper tub and at least a lower tub, the at least a row of tuyeres fluidly communicating inside the furnace with the outside environment, and (v) at least a burner positioned on at least one of at least an upper tub and at least a lower tub. The use of at least a burner jointly with the at least a row of tuyeres generates a very intense release of heat by virtue of the exothermic reactions which occur by this combination.

5. 发明授权

US6143054A Process of producing molten metals 有权
标题翻译：生产熔融金属的工艺
公开(公告)号：US6143054A
公开(公告)日：2000-11-07
申请号：US160913
申请日：1998-09-25
申请人： Rodney James Dry
发明人： Rodney James Dry
IPC分类号： C21B11/00 , C21B11/02 , C21B13/00 , C21B13/04 , C22B5/10
CPC分类号： C22B5/10 , C21B13/0026 , Y02P10/136
摘要： A molten bath-based direct smelting process for producing metals from metal oxides (including partially reduced metal oxides) is disclosed. The process includes causing upward movement of splashes, droplets, and streams of molten material from a metal layer (15) of the molten bath which:(i) promotes strong mixing of metal in a slag layer (16) of the molten bath so that the slag layer (16) is maintained in a strongly reducing condition leading to FeO levels below 8 wt % based on the total weight of the slag in the slag layer (16); and(ii) extends into a space above a nominal quiescent surface of the molten bath to form a transition zone (23).
摘要翻译：公开了一种用于从金属氧化物（包括部分还原的金属氧化物）生产金属的基于熔池的直接熔炼方法。该方法包括使熔融材料的溅出物，液滴和熔融物流从熔池的金属层（15）向上运动，其中：（i）促进金属在熔池的熔渣层（16）中的强烈混合，使得渣层（16）保持在强还原条件下，导致FeO水平基于炉渣层（16）中炉渣的总重量低于8重量％。和（ii）延伸到熔融浴的标称静止表面上方的空间中以形成过渡区（23）。

6. 发明授权

US5902375A Method of melting tinned iron scrap 失效
标题翻译：镀锡铁屑的熔化方法
公开(公告)号：US5902375A
公开(公告)日：1999-05-11
申请号：US849039
申请日：1997-06-16
申请人： Hiroaki Ishida , Yoshiki Ito , Takaiku Yamamoto
发明人： Hiroaki Ishida , Yoshiki Ito , Takaiku Yamamoto
IPC分类号： C21B11/02 , C21B13/00 , C21C5/28 , C21C5/46 , C21C7/00 , C22B7/00 , C22B25/06
CPC分类号： C22B25/06 , C21B11/02 , C21B13/002 , C21C5/28 , C21C5/466 , C22B7/003 , C22B7/004 , C21C7/0006 , Y02P10/228 , Y02P10/265 , Y02P10/283
摘要： The method of the invention comprises a method of melting tin-plated iron type scrap using tin-plated iron type scrap of loose packing as a portion of the iron type scrap and conducting melting while controlling the post combustion ratio of the gas by adjusting the amount of the combustion sustaining gas blown from the secondary tuyeres and a method of melting tin-plated iron type scrap packing the tin-plated iron type scrap prior to the non tin-plated iron type scrap and conducting melting while retaining the tin-melted iron type scrap between the coke packed layer and the non tin-plated iron type scrap packed layer. According to the melting method of the tin-plated iron scrap of the present invention, exhaust gas of high heat generation amount can be recovered while producing pig iron with low Sn content usable for the production of high quality steels by one furnace, without adding a preliminary Sn-removing processing step or molten metal mixing step and without using expensive electric power, by one furnace. Further, an exhaust gas dust in which SnO.sub.2 is concentrated can be utilized effectively as an Sn source. Accordingly, the method according to the present invention can be utilized in the field of melting market scrap such as surface treated steels.
摘要翻译： PCT No.PCT / JP96 / 02835 Sec。 371日期：1997年6月16日 102（e）日期1996年6月16日PCT提交1996年9月27日PCT公布。出版物WO97 / 12065 日期1997年04月3日本发明的方法包括使用镀锡铁型废料作为铁型废料的一部分的松散填料来熔化镀锡铁型废料并进行熔融的方法，同时控制通过调节从二次风口吹出的燃烧持续气体的量的气体，以及在镀锡铁型废料之前对镀锡铁型废料进行镀锡的铁型废料的熔融方法，同时保持焦炭填充层和非镀锡铁型废料填充层之间的锡熔融铁型废料。根据本发明的镀锡铁屑的熔融方法，可以生产高生热量的废气，同时生产低Sn含量的生铁，用于通过一个炉子生产高品质钢，而不添加初步的Sn去除加工步骤或熔融金属混合步骤，并且不使用昂贵的电力。另外，作为Sn源，可以有效地利用SnO 2浓缩的废气灰尘。因此，根据本发明的方法可用于熔融市场废料如表面处理钢的领域。

7. 发明授权

US5759232A Method of charging materials into cupola 失效
标题翻译：将材料装入圆顶的方法
公开(公告)号：US5759232A
公开(公告)日：1998-06-02
申请号：US814484
申请日：1997-03-10
申请人： Yukio Takahashi , Shuji Takeuchi , Nagayasu Bessho
发明人： Yukio Takahashi , Shuji Takeuchi , Nagayasu Bessho
IPC分类号： C21B11/02 , F27B1/20 , C21B5/00
CPC分类号： F27B1/20 , Y10S266/90
摘要： A method of charging an iron scrap melting cupola with iron scrap and coke enables the iron scrap to be melted with high energy efficiency. The charging pipe feed is set at a level "h" which meets the condition of h .ltoreq. (r-r') tan .theta., and iron scrap of a quantity Ws meeting the condition of Ws .ltoreq. 1/3.multidot..pi.r.sup.3 .multidot.tan .theta..multidot..rho..sub.s is charged through the charging pipe, followed by charging of coke, wherein h represents the height of the charging feed above the material in the cupola (meters), r represents the inside radius of the cupola (meters), r' represents the inside radius of the charging pipe (meters), .theta. represents the angle of repose of the iron scrap (degrees), Ws represents the quantity of iron scrap per cycle (kg/ch), and .rho..sub.s represents the bulk specific gravity of the iron scrap (kg/m.sup.3).
摘要翻译：用废铁和焦炭装入废铁熔融圆顶炉的方法使铁屑以高能量效率熔化。充电管进料设定在满足h

8. 发明授权

US5728193A Process for recovering metals from iron oxide bearing masses 失效
标题翻译：从氧化铁轴承质量中回收金属的方法
公开(公告)号：US5728193A
公开(公告)日：1998-03-17
申请号：US434372
申请日：1995-05-03
申请人： Shyam V. Dighe , William A. Morgan , Jerry L. Penland
发明人： Shyam V. Dighe , William A. Morgan , Jerry L. Penland
IPC分类号： C01G9/02 , C21B11/02 , C21B13/00 , C22B5/10 , C22B7/00 , C22B7/02 , C22B19/30 , C21B11/10 , C01G9/03
CPC分类号： C21B13/002 , Y02P10/136 , Y02P10/216 , Y10S423/10 , Y10S75/961
摘要： A process for recovering iron from an iron oxide bearing mass. The process includes forming a bed of lump coke in a vertical shaft furnace, feeding the iron oxide bearing mass and scrap metal onto the bed of lump coke and combusting the coke in the coke bed while injecting a plasma gas having a temperature greater than about 5,000.degree. F. into the coke bed to form a reaction zone within the coke bed having a temperature in excess of 4,000.degree. F. The iron oxide bearing mass and scrap metal fed onto the bed of lump coke is melted to form a molten phase containing molten iron oxide and molten scrap metal. The molten phase flows into the reaction zone and a film is formed on the lump coke within the reaction zone, the iron oxide in the film being reduced by carbon from the coke to form molten iron in a solid/liquid reduction. The molten iron is discharged from the furnace.
摘要翻译：从含氧化铁载体中回收铁的方法。该方法包括在垂直竖炉中形成块状焦炭床，将氧化铁载体和废金属供给到块状焦炭床上，并将焦炭中的焦炭燃烧，同时注入温度大于约5,000的等离子体气体将F.F加入焦炭床中以在焦炭床内形成温度超过4,000°F的反应区。供给到块状焦炭床上的含铁氧化物的质量和废金属被熔化以形成含有熔融氧化铁和熔融废铁。熔融相流入反应区，并且在反应区内的块状焦炭上形成膜，膜中的氧化铁被来自焦炭的碳还原，形成固/液还原中的铁水。铁水从炉中排出。

9. 发明授权

US5698010A Scrap melting method 失效
标题翻译：废料熔化法
公开(公告)号：US5698010A
公开(公告)日：1997-12-16
申请号：US550364
申请日：1995-10-30
申请人： Tatsuro Ariyama , Takanori Inoguchi , Masahiro Matsuura , Hidetoshi Noda , Takashi Sumigama , Noboru Sakamoto
发明人： Tatsuro Ariyama , Takanori Inoguchi , Masahiro Matsuura , Hidetoshi Noda , Takashi Sumigama , Noboru Sakamoto
IPC分类号： C21B11/02 , C21C5/56 , C21B11/00
CPC分类号： F23D1/00 , C21B11/02 , C21C5/562 , F23L7/007 , F23D2900/00006 , F23L2900/07002 , F23L2900/07009 , Y02E20/322 , Y02E20/344 , Y02P10/136 , Y02P10/216 , Y02P10/34
摘要： Provided herein is a scrap melting method capable of both producing a molten iron by efficiently melting scrap and producing a large amount of high calorie exhaust gas having a high utility value as a fuel gas and at the same time capable of performing such operation at a low production cost. Scrap, the source of iron, and coke are charged into a shaft furnace and pulverized coal and oxygen are injected into the furnace from a burner provided at the tuyere portion; in such injection of the pulverized coal and oxygen, the pulverized coal is injected from the center or in the vicinity thereof in diametrical direction of the burner and the oxygen is injected from the surrounding portion thereof to mix the two, thereby rapidly burning the pulverized coal in a combustion zone formed beyond the tuyere; and the scrap is melted by the sensible heat of thus generated combustion gas to produce a molten iron and the combustion gas is collected as a fuel gas without causing a significant post combustion of the combustion gas.
摘要翻译：本发明是一种废料熔融法，其能够通过有效地熔融废料来生产铁水，并且产生大量作为燃料气体的高效用值的高热量废气，同时能够以低的速度进行这种操作生产成本。将废铁，铁源和焦炭装入竖炉中，将粉煤和氧气从设置在风口部分的燃烧器注入炉内; 在这种粉煤和氧气的注入中，粉煤从燃烧器的直径方向从中心或其附近喷射，并且从周围部分注入氧气以混合两者，由此快速燃烧粉煤在形成在风口外的燃烧区; 并且废料被这样产生的燃烧气体的显热熔化以产生铁水，并且燃烧气体作为燃料气体收集而不会引起燃烧气体的显着的后燃烧。

10. 发明授权

US5522916A Method and apparatus for injecting liquid oxygen 失效
标题翻译：注射液氧的方法和装置
公开(公告)号：US5522916A
公开(公告)日：1996-06-04
申请号：US325449
申请日：1994-10-31
申请人： Pierre Karinthi , Marc Buffenoir , Eric Streicher
发明人： Pierre Karinthi , Marc Buffenoir , Eric Streicher
IPC分类号： C21B5/00 , C21B11/02 , F27B1/16 , F27B9/16 , C21B7/16
CPC分类号： C21B11/02 , C21B5/003 , F27B1/16
摘要： A high-speed jet of liquid oxygen (21) with a speed higher than 100 meters per second is delivered into the tuyeres of a blast furnace of cupola furnace together with pulverised carbon. The jet reaches the opposite wall of the cavity (9) formed at the outlet of the tuyere (6) in the mass of material contained in the shaft. Supplying oxygen to the bottom of the cavity improves the burning of the remaining coal, whereby higher injection levels may be achieved. The shape of the cavity may also be altered, and, in particular, faster reactions may be achieved in the axial region of the shaft.
摘要翻译： PCT No.PCT / FR94 / 00223 Sec。 371日期：1994年10月31日 102（e）日期1994年10月31日PCT 1994年2月28日PCT PCT。公开号WO94 / 20642 日期：1994年9月15日。速度高于100米/秒的高速液氧（21）喷射到冲天炉高炉的风嘴和粉碎碳。喷射器到达形成在风口（6）的出口处的空腔（9）的相对壁，所述腔体包含在轴中的材料块中。向空腔底部供氧可以改善剩余煤的燃烧，从而可以实现更高的注入水平。空腔的形状也可以改变，并且特别地，可以在轴的轴向区域中实现更快的反应。

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