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1. 发明申请

WO2023016663A1 ELECTROMAGNETIC STIRRING APPARATUS FOR A METAL FURNACE AND METHOD OF OPERATION THEREOF 审中-公开
公开(公告)号：WO2023016663A1
公开(公告)日：2023-02-16
申请号：PCT/EP2021/072643
申请日：2021-08-13
申请人： ABB SCHWEIZ AG
发明人： YANG, Hongliang , RYDHOLM, Bengt , TENG, Lidong , ZIELINSKA, Monika , WREDH, Simon
IPC分类号： F27D27/00 , C21C5/52 , F27D3/00
摘要： The present disclosure provides an. electromagnetic stirring apparatus for a metal furnace, including a stirring assembly having a ferromagnetic core arranged in a ring-like configuration, and at least three windings which are wound on the ferromagnetic core such that a winding axis of each one of the at least three windings extends in a circumferential direction with respect to the ring-like configuration. The electromagnetic stirring apparatus further includes a multiphase AC power supply electrically connected to the at least three windings and a mounting member for mounting the stirring assembly below the metal furnace, wherein the multiphase AC power supply is configured for providing electrical currents to each of the at least three windings, the electrical currents being adapted for generating an electromagnetic stirring field for stirring a melt in the metal furnace when the stirring assembly is mounted below the metal furnace. The present disclosure further provides a metal furnace having the electromagnetic stirring apparatus, and a method for stirring a melt in a metal furnace.

2. 发明申请

WO2023281153A1 A METHOD FOR PROCESSING IRON ORE TO OBTAIN STEEL 审中-公开
公开(公告)号：WO2023281153A1
公开(公告)日：2023-01-12
申请号：PCT/FI2021/050526
申请日：2021-07-06
申请人： METSO OUTOTEC FINLAND OY
发明人： HAIMI, Timo , PEKKALA, Olli
IPC分类号： C21B13/14 , C21B3/02 , C21C5/52 , C21C5/28
摘要： A method for processing iron ore to obtain steel (501) by feeding the DRI into a smelting furnace (1) so as to obtain an intermediate iron product, which is then subsequently introduced (301) into a conversion unit for obtaining steel (501) form the intermediate iron product. Moreover, carbon is introduced (401) into the process. As a consequence, a suitable carbon content may be achieved for the intermediate iron product such that impurities of the intermediate iron product may be reduced along with carbon contents thereof in a steel conversion process without sacrificing iron contents of the intermediate iron product. Simultaneously, suitable fluxes are fed (201; 202) into the smelting furnace (1) together with the DRI, such that high-quality slag suitable as raw material for further processing is obtained therefrom. An associated smelting furnace arrangement is also disclosed.

3. 发明申请

WO2022118201A1 SCRAP INVENTORY MANAGEMENT METHOD 审中-公开
公开(公告)号：WO2022118201A1
公开(公告)日：2022-06-09
申请号：PCT/IB2021/061157
申请日：2021-12-01
申请人： ARCELORMITTAL
发明人： ENA RODRIGUEZ, Borja , VALLEDOR PELLICER, Pablo , FERNANDEZ ALONSO, Alejandro , DIAZ FIDALGO, Diego
IPC分类号： C21C5/52 , C21C5/56
摘要： A scrap inventory management method allowing to have a better control of scrap stocks. The method includes a calculation step of at least one combination of an action to be performed and an associated quantity for a given scrap based on characteristics of the liquid steel to be produced and on scrap properties.

4. 发明申请

WO2022098375A1 PREDICTIVE REFRACTORY PERFORMANCE MEASUREMENT SYSTEM 审中-公开
公开(公告)号：WO2022098375A1
公开(公告)日：2022-05-12
申请号：PCT/US2020/062543
申请日：2020-11-30
申请人： HARBISONWALKER INTERNATIONAL, INC.
发明人： RICHTER, Tomas , FORSTER, Corey , ABRINO, Donald
IPC分类号： F27B3/28 , F27D21/00 , C21C5/46 , C21C5/52 , C03B5/425 , C03B17/00 , C03B18/16 , G01N21/00
摘要： A measurement system is provided for predicting a future status of a refractory lining that is lined over an inner surface of an outer wall of a manufacturing vessel and exposed to an operational cycle during which the refractory lining is exposed to a high-temperature environment for producing a non-metal and the produced non-metal. The system includes one or more laser scanners and a processor. The laser scanners are configured to conduct one or more pre-operational laser scans of the refractory lining prior to the operational cycle to collect data related to pre-operational cycle structural conditions, and one or more post-operational laser scans of the refractory lining after the operational cycle to collect data related to post-operational cycle structural conditions of the refractory lining. The processor is configured to predict future status of the refractory lining after subsequent operational cycles based on the determined exposure impact of the operational cycle.

5. 发明申请

WO2021188397A1 ESTIMATION OR CONTROL OF LENGTHS AND POSITIONS OF ONE OR MORE TRANSVERSELY LOCALIZED ELECTRIC CURRENT SEGMENTS FLOWING BETWEEN TWO CONDUCTIVE BODIES 审中-公开
公开(公告)号：WO2021188397A1
公开(公告)日：2021-09-23
申请号：PCT/US2021/022264
申请日：2021-03-15
申请人： KW ASSOCIATES LLC
发明人： CIBULA, Matthew, A. , PETTINGER, Nathan, L. , KING, Paul, E. , MOTLEY, Joshua, R.
IPC分类号： C21C5/52 , F27B3/08 , F27B3/28 , F27D19/00 , F27D21/00 , G01R33/07
摘要： Magnetic field components are measured at multiple longitudinal positions and used to calculate estimated longitudinal position and length of a transversely localized electric current segment flowing across a gap between conductive bodies. The apparatus can be used with a remelting furnace. The electrode and ingot act as the conductive bodies, and arcs, discharges, or slag currents are the current segments spanning the gap. Actuators for movable sensors can be coupled to the sensors in a servomechanism arrangement to move the sensors along with the moving gap. An actuator for moving one of the conductive bodies can be coupled to sensors in a servomechanism arrangement to maintain the gap distance within a selected range as the gap moves.

6. 发明申请

WO2021144637A1 IMPROVED PROCESS AND PLANT FOR PREHEATING A METAL CHARGE FED IN CONTINUOUS TO AN ELECTRIC MELTING FURNACE 审中-公开
公开(公告)号：WO2021144637A1
公开(公告)日：2021-07-22
申请号：PCT/IB2020/061879
申请日：2020-12-14
申请人： TENOVA S.P.A.
发明人： GIAVANI, Cesare , REALI, Silvio Maria
IPC分类号： C21C5/52 , C21C5/56 , F27D13/00 , F27D17/00 , F27B3/18 , C21C2100/06 , C21C5/565 , F27D13/002 , F27D7/02
摘要： A process and plant for preheating a metal charge (11) fed in continuous to an electric melting furnace (12) through a preheating tunnel (16) provided with side walls, a vault and horizontal conveyor (13), wherein said metal charge (11) is enveloped in countercurrent by the fumes or exhaust gases (17) exiting from said electric melting furnace (12). According to said process and plant, the air intake for completing the combustion of said fumes or exhaust gases (17) is effected from the surrounding environment through openings along the preheating tunnel, preferably openings present at the interface between said preheating tunnel and said electric melting furnace, said intake being regulated by acting on suction fans and/or on said openings, on the basis of measurements revealed by temperature sensors (21) and/or composition of the outgoing gases located in the terminal part of said tunnel (16) or downstream of said part; the metal charge is enveloped by jets of gas ejected through a plurality of nozzles (15) arranged on the vault of said tunnel (16), the jets of gas injected by said nozzles (15) being non- uniformly distributed transversely on the vault of the preheating tunnel (16), with a greater concentration on the top of the vault of said tunnel (16) and the jets of gas being non- uniformly distributed longitudinally along said preheating A process and plant for preheating a metal charge (11) fed in continuous to an electric melting furnace (12) through a preheating tunnel (16) provided with side walls, a vault and horizontal conveyor (13), wherein said metal charge (11) is enveloped in countercurrent by the fumes or exhaust gases (17) exiting from said electric melting furnace (12). According to said process and plant, the air intake for completing the combustion of said fumes or exhaust gases (17) is effected from the surrounding environment through openings along the preheating tunnel, preferably openings present at the interface between said preheating tunnel and said electric melting furnace, said intake being regulated by acting on suction fans and/or on said openings, on the basis of measurements revealed by temperature sensors (21) and/or composition of the outgoing gases located in the terminal part of said tunnel (16) or downstream of said part; the metal charge is enveloped by jets of gas ejected through a plurality of nozzles (15) arranged on the vault of said tunnel (16), the jets of gas injected by said nozzles (15) being non- uniformly distributed transversely on the vault of the preheating tunnel (16), with a greater concentration on the top of the vault of said tunnel (16) and the jets of gas being non- uniformly distributed longitudinally along said preheating tunnel (16), transverse sections being provided along which said nozzles (15) are distributed, interspersed with longitudinal sections of tunnel (16) without said nozzles (15) so as to avoid interference phenomena.

7. 发明申请

WO2021122807A1 VERFAHREN UND ANLAGE ZUR ÜBERWACHUNG EINES ABGIESSVORGANGES VON FLÜSSIGEM METALL UND/ODER SCHLACKE AUS EINEM METALLURGISCHEN GEFÄSS 审中-公开
公开(公告)号：WO2021122807A1
公开(公告)日：2021-06-24
申请号：PCT/EP2020/086509
申请日：2020-12-16
申请人： PRIMETALS TECHNOLOGIES AUSTRIA GMBH
发明人： ROHRHOFER, Andreas , FISCHER, Paul , HARTL, Franz , MAYRHOFER, Anna , STADLMAYR, Richard , VOGLMAYR, Bernhard
IPC分类号： C21B7/14 , C21C5/46 , F27D21/04 , F27D21/00 , F27D3/15 , F27D21/02 , F27D19/00 , C21C5/52 , C21C2005/5288 , C21C5/4653 , C21C5/4673 , F27D2019/0096 , F27D2021/026 , F27D3/1545
摘要： Die Erfindung betrifft das Gebiet der metallurgischen Anlagen, konkret metallurgische Gefäße für flüssiges Metall und flüssige Schlacke. Die Aufgabe der Erfindung ist es, ein sicheres Abgießen von flüssigem Metall (14) aus einem metallurgischen Gefäß in ein anderes metallurgisches Gefäß zu gewährleisten, ohne Menschen oder Anlagenteile im Bereich eines Abgießvorganges zu gefährden. Die Aufgabe wird dadurch gelöst, dass für das zweite metallurgische Gefäß (11) aufgrund von Informationen aus einem Speicher (2) eine Abgießposition bestimmt wird. Das zweite metallurgische Gefäß (11) wird an dieser Abgießposition platziert und diese Abgießposition wird im Speicher (2) als angefahren markiert. Wenn das metallurgische Gefäß eine zweite Öffnung (13) aufweist, kann diese mit einem optischen Sensorsystem (3a) überwacht werden. Mithilfe der Auswerteeinheit (1) wird bei Erkennung von flüssiger Schlacke (15) und / oder Stahl (14) in einem vordefinierten Bereich dieser zweiten Öffnung (13) ein Alarm ausgegeben und/oder einem Steuer- und Regelsystem (4) wird ein Signal übermittelt.

8. 发明申请

WO2021097500A1 A SYSTEM FOR PREDICTING SUBMERGED ORE FURNACE ELECTRODE LENGTHS AND FOR AUTOMATIC ADJUSTMENT AND CONTROL THEREOF 审中-公开
公开(公告)号：WO2021097500A1
公开(公告)日：2021-05-20
申请号：PCT/ZA2020/050061
申请日：2020-11-11
申请人： BEYLEFELD, Jacques
发明人： BEYLEFELD, Jacques
IPC分类号： C21C5/52 , F27B3/28 , F27D11/10 , F27D19/00 , F27D21/00 , H05B7/10 , H05B7/148 , H05B7/152
摘要： The invention provides a method for predicting a length of each of a plurality of electrodes in a submerged arc furnace and for making an adjustment to the length of an electrode based on the length as predicted, which method includes the steps of: entering into a processor which runs a program which includes an artificial intelligence algorithm a dataset which includes a measurement of the length of each electrode ("the measured length") and information on one or more of the following which is associated with the measured length: the temperature of a hearth of the furnace, the temperature of a sidewall of a furnace, the electrical power supply to the electrodes, the rate at which the electrode moves through a holder of each electrode and the vertical position of the holder; entering into the processor data from one or more of the following: a first temperature sensor for measuring the temperature of the hearth, a second temperature sensor for measuring the temperature in the sidewall a power measuring device for measuring the electrical power supply to the electrodes, a slip meter for measuring the rate at which the electrode moves through the holder, and a position sensor for measuring the vertical position of the holder; obtaining from the processor based on the dataset and the data an estimate of the length of each electrode ("the estimated length"); and adjusting the length of an electrode based on the estimated length of each electrode by changing the rate at which the electrode moves through the holder or by changing the vertical position of the holder.

9. 发明申请

WO2021094646A1 DIRECT CURRENT ELECTRIC ARC FURNACE 审中-公开
公开(公告)号：WO2021094646A1
公开(公告)日：2021-05-20
申请号：PCT/FI2019/050820
申请日：2019-11-15
申请人： MASERCATA OY
发明人： HURTTA, Matti
IPC分类号： C22B9/20 , C22B4/06 , C21C5/52 , C22C38/40 , C22C38/28
摘要： The invention relates to a method for extracting metal from metal-containing raw material in a batch process by using a direct current electric arc furnace (100) having one or more than one top electrode (125) and at least one bottom electrode (115), wherein the method comprises the following steps: adding the metal-containing raw material to the furnace (100), thereby obtaining a loaded bath, moving the top electrode(s) (125) on to the raw material, heating the loaded bath in a heating step by applying direct current through the top electrode(s) to provide an arc to melt the raw material, thereby obtaining molten metal (202), wherein an average voltage during the heating step is from 20 V to 110 V, and forming solid metal from the molten metal (202). The invention further relates to a direct current electric arc furnace, a system comprising a direct current electric arc furnace, and a solid metal obtainable by the method.

10. 发明申请

WO2021053701A1 METHOD OF STIRRING LIQUID METAL IN AN ELECTRIC ARC FURNACE 审中-公开
公开(公告)号：WO2021053701A1
公开(公告)日：2021-03-25
申请号：PCT/IT2020/050223
申请日：2020-09-15
申请人： DANIELI & C. OFFICINE MECCANICHE S.P.A.
发明人： PATRIZIO, Damiano , CODUTTI, Andrea , BURIN, Paolo , SELLAN, Romano , GAGLIARDI, Nicola
IPC分类号： F27B3/08 , C21C5/52 , F27B3/10 , F27D27/00 , F27D3/00
摘要： Method for electromagnetic stirring of liquid metal in a continuous charge electric arc furnace (10), in which there are positioned a first electromagnetic field along a first axis of electromagnetic stirring (XI) and a second electromagnetic field along a second axis of electromagnetic stirring (X2).

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