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1. 发明公开

US20240191314A1 METHOD OF OPERATING AN ELECTRIC ARC FURNACE AND STEEL MILL 审中-公开
公开(公告)号：US20240191314A1
公开(公告)日：2024-06-13
申请号：US18286667
申请日：2022-04-20
申请人： PAUL WURTH S.A.
发明人： Jan KRULL , Katia PAPALIA
IPC分类号： C21B13/12 , C21B13/00 , F27B3/22 , F27D17/00
CPC分类号： C21B13/12 , C21B13/0006 , C21B13/0073 , F27B3/22 , F27D17/003 , C21B2100/80 , C21B2300/02
摘要： The disclosure discloses a method of operating an electric arc furnace, the method comprising capturing, from at least one facility of a steel mill, a heated metallurgical gas comprising water and carbon monoxide; conducting, by a reactor supply line, said metallurgical gas to a reactor; transforming, by a treatment of said metallurgical gas within said reactor, the carbon monoxide and water into hydrogen and carbon dioxide according to a water-gas shift reaction; and subsequently separating said hydrogen by a separation device. The method is characterized in that it further comprises providing an iron-bearing material, which comprises iron mainly in the form of iron oxide, to the electric arc furnace; at least partially melting the iron-bearing material to obtain a molten bath; conducting, by a furnace supply line, said hydrogen to the electric arc furnace, which is arranged downstream of the furnace supply line; and injecting, by a plurality of hydrogen injection devices, said hydrogen into said electric arc furnace, such that said hydrogen reacts as a reducing agent for reducing iron oxide in the molten bath during a smelting operation of the electric arc furnace.

2. 发明授权

US11959153B2 Production of iron 有权
公开(公告)号：US11959153B2
公开(公告)日：2024-04-16
申请号：US17903773
申请日：2022-09-06
申请人： Technological Resources Pty. Limited
发明人： Michael Buckley
IPC分类号： C22B5/10 , C21B3/00 , C21B11/10 , C21B13/00 , C21B13/12 , C21B15/00 , C22B5/00 , F27D11/12 , F27D19/00 , F27D99/00 , H05B6/80
CPC分类号： C22B5/10 , C21B3/00 , C21B11/10 , C21B13/004 , C21B13/0066 , C21B13/12 , C21B15/00 , C22B5/00 , F27D11/12 , F27D19/00 , H05B6/806 , C21B2200/00 , F27D2099/0028 , Y02P10/122
摘要： A process for direct reduction of iron ore in a solid state includes exposing briquettes of iron ore fragments and biomass to electromagnetic energy under anoxic conditions and generating heat within iron ore in the briquettes. The iron ore is reduced in a solid state within the briquettes, and the biomass provides a source of reductant.

3. 发明授权

US11742660B2 Plant for melting and/or heating metal material and method to power it 有权
公开(公告)号：US11742660B2
公开(公告)日：2023-08-29
申请号：US17782992
申请日：2020-11-26
申请人： DANIELI AUTOMATION S.P.A.
发明人： Antonello Mordeglia
IPC分类号： H02J3/00 , H02J3/38 , C21B13/12 , H02J3/46 , H05B6/06 , H05B7/148
CPC分类号： H02J3/007 , C21B13/12 , H02J3/381 , H02J3/46 , H05B6/067 , H05B7/148
摘要： A plant for melting and/or heating metal material includes a furnace, electrical energy feed means and an electric power apparatus connected between the feed means and the furnace; and a corresponding method to power the melting and/or heating plant.

4. 发明申请

US20230002852A1 Production of Iron 有权
公开(公告)号：US20230002852A1
公开(公告)日：2023-01-05
申请号：US17903773
申请日：2022-09-06
申请人： Technological Resources Pty. Limited
发明人： Michael Buckley
IPC分类号： C22B5/10 , C21B15/00 , C21B13/00 , C21B11/10 , H05B6/80 , C21B13/12 , C22B5/00 , F27D19/00 , F27D11/12 , F27D99/00
摘要： A process for direct reduction of iron ore in a solid state includes exposing briquettes of iron ore fragments and biomass to electromagnetic energy under anoxic conditions and generating heat within iron ore in the briquettes. The iron ore is reduced in a solid state within the briquettes, and the biomass provides a source of reductant.

5. 发明申请

US20220389536A1 PLASMA INDUCED FUMING FURNACE 有权
公开(公告)号：US20220389536A1
公开(公告)日：2022-12-08
申请号：US17773674
申请日：2020-11-20
申请人： AURUBIS BEERSE
发明人： Mathias Chintinne , Yves De Visscher , Charles Geenen , Bert Coletti
IPC分类号： C22B4/00 , C21B13/00 , C21B13/12 , C21B3/06 , C22B5/16 , C22B7/04 , F27B3/20 , F27B3/22 , F27D99/00
摘要： Disclosed is a single-chamber furnace for fuming an evaporable metal or metal compound from a metallurgical charge including a bath furnace for containing a molten charge up to a determined level, the furnace being equipped with a non-transferred plasma torch for the generation of plasma and a first submerged injector for injecting the plasma below the determined level, the furnace further including an afterburning zone to form an oxidized form of the at least one evaporable metal or metal compound, and a recovery zone for recovering the oxidized form from the gas formed in the afterburning zone, whereby the furnace is further equipped with a second submerged injector for injecting extra gas into the furnace below the determined level. Further disclosed is the use of the furnace and a process for fuming an evaporable metal or metal compound from a metallurgical charge.

6. 发明申请

US20220064744A1 METHOD AND DEVICE FOR PRODUCING DIRECT REDUCED METAL 有权
公开(公告)号：US20220064744A1
公开(公告)日：2022-03-03
申请号：US17599504
申请日：2020-03-31
申请人： GREENIRON H2 AB
发明人： Hans MURRAY
IPC分类号： C21B13/12
摘要： Method for producing direct reduced metal material, comprising the steps: a) charging metal material to be reduced into a first furnace space (120) of a first furnace (220); b) evacuating an existing atmosphere from the first furnace space (120) so as to achieve an underpressure; c) providing, in a main heating step, heat and first hydrogen gas to the first furnace space (120), so that metal oxides present in the metal material are reduced, in turn causing water vapour to be formed; and d) condensing and collecting the water vapour formed in step c in a condenser (160) below the charged metal material. The first hydrogen gas in step c is provided without recirculation of the first hydrogen gas, the method further comprises a subsequently performed charged material cooling step, in which thermal energy from the charged material is absorbed by said first hydrogen gas, and in which thermal energy, by heat exchange, is transferred from said first hydrogen gas to second hydrogen gas to be used in a second furnace (210) for producing direct reduced metal material. The invention also relates to a system.

7. 发明授权

US10995379B2 Method and apparatus for the production of cast iron, cast iron produced according to said method 有权
公开(公告)号：US10995379B2
公开(公告)日：2021-05-04
申请号：US15763441
申请日：2017-05-29
申请人： TENOVA S.P.A.
发明人： Francesco Memoli , Cesare Giavani , Silvio Maria Reali , Kyle James Shoop
IPC分类号： C21B13/14 , C22C33/08 , B22F9/08 , C21B13/12 , C21C1/08 , C21C5/52 , C21B13/00 , C22C37/00 , C21B11/10 , C22C33/02
摘要： A method for the production of cast iron starting from pre-reduced iron ore (DRI) with an electric arc furnace includes the steps of preparing a charge of pre-reduced iron ore DRI having a metallization higher than 90% and containing over 2.8% by weight of carbon, wherein at least 80% of the carbon is combined with the iron to form iron carbide Fe3C; charging the charge of pre-reduced iron ore into the electric arc furnace; and melting the DRI charge to form liquid cast iron having at least 80% by weight of actual carbon content deriving from the carbon in the charge of pre-reduced iron ore, the melting step being in a reducing atmosphere and in a melting chamber of the electric arc furnace subjected to a positive internal pressure generated by the gases produced by reduction reactions that develop during melting.

8. 发明授权

US10428410B2 High toughness secondary hardening steels with nickel as a primary strength and toughening agent 有权
公开(公告)号：US10428410B2
公开(公告)日：2019-10-01
申请号：US15136205
申请日：2016-04-22
申请人： Carnegie Mellon University
发明人： Warren M. Garrison, Jr.
IPC分类号： C22C38/46 , C22C38/02 , C22C38/42 , C22C38/44 , C21B13/12 , C21D1/18
摘要： Steel alloys having high yield and ultimate tensile strengths in combination with high toughness based on medium carbon secondary hardening steel compositions having low cobalt content. Nickel is added to the medium carbon secondary hardening steel compositions to increase the yield and tensile strengths and fracture toughness. Applications of a steel alloy of the present disclosure include structural applications requiring high strength and high fracture toughness, such as aircraft landing gear.

9. 发明申请

US20190241990A1 Production of Iron 审中-公开
公开(公告)号：US20190241990A1
公开(公告)日：2019-08-08
申请号：US16343833
申请日：2017-10-24
申请人： Technological Resources Pty. Limited
发明人： Michael Buckley
IPC分类号： C22B5/10 , C21B13/12 , C21B13/00
CPC分类号： C22B5/10 , C21B11/10 , C21B13/004 , C21B13/0066 , C21B13/12 , C21B15/00 , C21B2200/00 , C22B5/00 , F27D99/0006 , F27D2099/0028 , H05B6/806 , Y02P10/122
摘要： A process for direct reduction of iron ore in a solid state is disclosed. The process operates under anoxic conditions with biomass as a reductant and with electromagnetic energy as a source of heat.

10. 发明申请

US20180274047A1 Method and apparatus for the production of cast iron, cast iron produced according to said method 审中-公开
公开(公告)号：US20180274047A1
公开(公告)日：2018-09-27
申请号：US15763441
申请日：2017-05-29
申请人： TENOVA S.P.A.
发明人： Francesco Memoli , Cesare Giavani , Sivio Maria Reali , Kyle James Shoop
IPC分类号： C21B13/14 , C22C33/08 , B22F9/08 , C21B13/12 , C21C1/08 , C21C5/52 , C21B13/00 , C22C37/00
CPC分类号： C21B13/143 , B22F9/082 , C21B11/10 , C21B13/0086 , C21B13/12 , C21C1/08 , C21C5/5211 , C22C33/0271 , C22C33/08 , C22C37/00 , Y02P10/216
摘要： A method for the production of cast iron starting from pre-reduced iron ore (DRI) with an electric arc furnace includes the steps of preparing a charge of pre-reduced iron ore DRI having a metallization higher than 90% and containing over 2.8% by weight of carbon, wherein at least 80% of the carbon is combined with the iron to form iron carbide Fe3C; charging the charge of pre-reduced iron ore into the electric arc furnace; and melting the DRI charge to form liquid cast iron having at least 80% by weight of actual carbon content deriving from the carbon in the charge of pre-reduced iron ore, the melting step being in a reducing atmosphere and in a melting chamber of the electric arc furnace subjected to a positive internal pressure generated by the gases produced by reduction reactions that develop during melting.

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