WO2024251918A1 - Dispositif de chauffage de métal par induction - Google Patents

Dispositif de chauffage de métal par induction Download PDF

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Publication number
WO2024251918A1
WO2024251918A1 PCT/EP2024/065677 EP2024065677W WO2024251918A1 WO 2024251918 A1 WO2024251918 A1 WO 2024251918A1 EP 2024065677 W EP2024065677 W EP 2024065677W WO 2024251918 A1 WO2024251918 A1 WO 2024251918A1
Authority
WO
WIPO (PCT)
Prior art keywords
chamber
molten metal
fill level
melting
partition wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2024/065677
Other languages
German (de)
English (en)
Inventor
Alexander Keller
Benjamin Kramm
Stefan LANDTRETER
Christian LINDECKE
Patrick LÜCK
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABP Induction Systems GmbH
Original Assignee
ABP Induction Systems GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ABP Induction Systems GmbH filed Critical ABP Induction Systems GmbH
Priority to CN202480037719.4A priority Critical patent/CN121713036A/zh
Priority to EP24732218.3A priority patent/EP4724754A1/fr
Publication of WO2024251918A1 publication Critical patent/WO2024251918A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/04—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces of multiple-hearth type; of multiple-chamber type; Combinations of hearth-type furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/06—Crucible or pot furnaces heated electrically, e.g. induction crucible furnaces with or without any other source of heat
    • F27B14/061—Induction furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces heated electrically, with or without any other source of heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0006—Electric heating elements or system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0006—Electric heating elements or system
    • F27D2099/0015—Induction heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangement of monitoring devices; Arrangement of safety devices
    • F27D21/0014—Devices for monitoring temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D27/00—Stirring devices for molten material

Definitions

  • the present invention relates to a device for inductive heating of metal, in particular for inductive heating of a molten metal, wherein the device has at least one melting chamber with at least one inductor, a material feed and a chamber for the molten metal.
  • a device for inductive heating of metal in particular for inductive heating of a molten metal
  • the device has at least one melting chamber with at least one inductor, a material feed and a chamber for the molten metal.
  • Such a device is also referred to as a multi-chamber melting furnace.
  • a multi-chamber melting furnace for melting metal scrap in particular aluminum scrap, has become known, which has a melting chamber for charging material in which impurities on the charging material can be removed.
  • the multi-chamber melting furnace also has a heating chamber which is connected to the at least one melting chamber and has a device for supplying heat.
  • a charging hearth is known for charging the multi-chamber melting furnace with scrap, via which the metal scrap is fed.
  • DE 15 83 460 Al has disclosed a channel inductor which is arranged on the underside of a furnace and heats the melt in the furnace.
  • the channel inductor comprises a semicircular channel made of a refractory material which has an inlet and an outlet section and is filled with liquid metal during operation.
  • An alternating current flows through an induction coil of the inductor and initiates eddy currents in the molten metal, which lead to its heating.
  • crucible inductors are also known, such as in DE 10 2017 102 924 Al.
  • the present invention is based on the object of providing a device for inductive heating of a metal melt, which continuously and can supply a downstream production plant with a metal melt without interruption.
  • the device according to the invention is intended and designed for inductive heating of a molten metal.
  • the device has at least one melting chamber with at least one inductor, a material feed and a discharge chamber for the molten metal.
  • the discharge chamber has a transfer section which is designed to discharge liquid molten metal to a downstream unit.
  • the material feed supplies material in response to a fill level signal of the melting chamber, wherein a fill level measuring device is provided which detects a fill level of the molten metal and controls the material feed with the fill level signal when the fill level falls below a predetermined minimum fill level.
  • the solution to the problem according to the invention is based on the knowledge that a continuous and uninterrupted flow of molten metal for a downstream unit is not possible through automated and uniform feeding with material, but can only be achieved with a monitored fill level in the melting furnace and corresponding control of the material feed via a fill level signal. By checking the minimum fill level, it can be ensured that melting and heating processes of varying lengths do not lead to an uneven material flow, but that it remains reliably constant.
  • the fill level measuring device controls the material supply in such a way that an approximately constant fill level for the molten metal is present at the transfer section. In particular, when the transfer section is designed as an overflow for the molten metal, an approximately constant fill level is important for a uniform material flow.
  • this is a multi-chamber melting furnace in which the individual chambers are separated from one another by partition walls.
  • the partition wall extends into the molten metal in such a way that the molten metal does not flow over the surface but rather over the bottom of the chambers under the partition wall into the adjacent chamber.
  • the discharge chamber is separated by a first partition wall extending into the molten metal in such a way that the molten metal does not flow over the surface but rather over the bottom of the discharge chamber under the partition wall.
  • a second partition wall extending into the molten metal is also provided, which separates the melting chamber.
  • a mixing chamber is provided between the discharge chamber and the melting chamber.
  • the first partition wall thus separates the mixing chamber from the discharge chamber, while the second partition wall separates the melting chamber from the mixing chamber.
  • One or more of the following elements can be provided in the mixing chamber: a stirring unit for the molten metal, a temperature measuring device and a lockable lid.
  • a predetermined atmosphere can be generated in the mixing chamber via the lockable lid.
  • a supply for purge gas can also be provided at the bottom of the mixing chamber and/or discharge chamber.
  • the temperature measuring device can be provided, for example, to control the inductor, which is controlled according to the measured Temperature value is controlled in order to keep the molten metal within a predetermined temperature range.
  • the melting chamber is designed with at least one channel inductor which is designed to heat the melting chamber.
  • at least one channel inductor which is designed to heat the melting chamber.
  • three or more channel inductors are used.
  • Each channel inductor can be operated evenly. It is also possible to increase the power of the inductor when new material is fed in via the material feed in order to support the melting process.
  • several inductors are provided on the melting chamber in order to provide the required power and to maintain an even heat flow.
  • one or more of the chambers can be provided with a suction device in order to remove an atmosphere forming above the molten metal.
  • the emergency drain(s) are closed, for example, by a plug or a slide valve.
  • the device with its chambers is mounted in a tiltable manner, so that the chambers and in particular the inductor can run empty by tilting the device.
  • Fig. 1 a multi-channel melting furnace with a conveyor system for supplying the melt and Fig. 2 shows the multi-chamber melting furnace from Figure 1 with an additional supply for purge gas.
  • FIG. 1 shows a multi-chamber melting furnace 10 that is connected to a downstream unit 12.
  • the multi-chamber melting furnace 10 has a fireproof lining 14.
  • the multi-chamber melting furnace 10 is divided into a melting chamber 16, a mixing chamber 18 and a discharge chamber 20.
  • Material is supplied via a conveyor 22, a ramp 24 and a protection of the filling opening 26.
  • the feed material for example aluminum scrap, is fed to the melting chamber 16 via the conveyor.
  • the melt and the freshly fed metal scrap are heated via a channel inductor 28.
  • the protection of the filling opening 26 closes off the space above the melting chamber 16 and allows the metal scrap to pass through the conveyor.
  • a cover 30 is provided above the melting chamber 16, which can also be equipped with a suction device, for example.
  • the discharge to chamber 20 is separated from the mixing chamber 18 by a first partition wall 30.
  • the molten metal can pass from the mixing chamber 18 into the discharge chamber 20 below the partition wall 30 in the area 32.
  • the discharge chamber 20 has a transition section 34 via which the molten metal passes to the downstream unit 12.
  • the amount of molten metal passed into the downstream unit 12 is regulated by the multi-chamber melting furnace in such a way that a continuous flow is provided which is taken from the downstream unit 12.
  • a fill level measuring device 38 is provided in the dispensing chamber 20.
  • the fill level measuring device measures contact-free for example optically via light beams 40, in particular laser beams.
  • An acoustic measurement, for example by ultrasound, can also be provided as a contactless measuring method of the level measuring device.
  • the light beam 40 detects the level of the molten metal at the transfer point 36.
  • the transfer point 36 forms a conclusion of the transition section 34.
  • the measured level signal controls, for example, the conveyor device 22 to run for a predetermined time and to introduce the feedstock into the melting chamber.
  • the mixing chamber 18 is equipped with a stirrer 42.
  • the stirrer 42 mixes the molten metal, for example close to the first partition wall 30.
  • the temperature measuring device 44 measures the temperature in the molten metal, whereby the measured temperature value can be reported back to the channel inductor 28, for example, in order to control it accordingly.
  • the mixing chamber 18 is closed by a cover 46, so that a defined gas atmosphere can form in the mixing chamber 18 above the molten metal.
  • the mixing chamber 18 is separated from the melting chamber 16 by a second partition wall 48, so that the molten metal in the region 50 below the second partition wall 48 can pass from the melting chamber 16 into the mixing chamber 18.
  • Figure 2 additionally shows a supply of purge gas 52, which can be added to the molten metal in the mixing chamber.
  • the overall process in the multi-chamber melting furnace for the continuous and uninterrupted supply of the downstream unit 12 is carried out in such a way that feedstock in the form of ingots and circulating material is fed via the conveyor device 22 or a robot (not shown) is transported into the melting chamber 16.
  • the material is introduced into the melt bath as evenly as possible.
  • the heat that is transferred from the melt to the submerged material causes it to liquefy.
  • the level of the melt bath fluctuates within a working area due to the introduction of new, solid feedstock and the release of molten metal at the transfer point 36.
  • the temperature of the molten metal can also be regulated via the temperature measuring device 44 and the inductor 28 can be controlled accordingly taking the fill level into account.
  • the necessary melting and heat-holding energy is supplied to the bath in the form of heat by the inductor 28.
  • the material passes through the mixing chamber 18 of the melting furnace.
  • samples can be taken or additives can be added to the molten metal.
  • the bath movement and a homogeneous temperature distribution can also be supported by the stirrer 22.
  • the molten metal is transferred at the transfer point 36 to a downstream unit 12, for example a downstream furnace.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Furnace Details (AREA)

Abstract

La présente invention concerne un dispositif de chauffage par induction d'une masse fondue métallique, qui présente au moins une chambre de fusion avec une bobine d'induction, une alimentation en matériau et une chambre de décharge pour la masse fondue métallique, la chambre de décharge ayant une section de transfert, qui est conçue pour décharger la masse fondue métallique vers une unité en aval, et la charge de matériau alimente la chambre de fusion en réponse à un signal de niveau de remplissage, un dispositif de mesure de niveau de remplissage étant prévu, qui détecte un niveau de remplissage de la masse fondue métallique et active la charge de matériau avec le signal de niveau de remplissage si le niveau de remplissage est inférieur à un niveau de remplissage minimal prédéterminé.
PCT/EP2024/065677 2023-06-08 2024-06-06 Dispositif de chauffage de métal par induction Ceased WO2024251918A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202480037719.4A CN121713036A (zh) 2023-06-08 2024-06-06 用于感应式加热金属的设备
EP24732218.3A EP4724754A1 (fr) 2023-06-08 2024-06-06 Dispositif de chauffage de métal par induction

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102023115104.5A DE102023115104A1 (de) 2023-06-08 2023-06-08 Vorrichtung zur induktiven Erwärmung von Metall
DE102023115104.5 2023-06-08

Publications (1)

Publication Number Publication Date
WO2024251918A1 true WO2024251918A1 (fr) 2024-12-12

Family

ID=91470111

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2024/065677 Ceased WO2024251918A1 (fr) 2023-06-08 2024-06-06 Dispositif de chauffage de métal par induction

Country Status (4)

Country Link
EP (1) EP4724754A1 (fr)
CN (1) CN121713036A (fr)
DE (1) DE102023115104A1 (fr)
WO (1) WO2024251918A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1583460A1 (de) 1967-08-29 1970-08-06 Junker Dr Ing Eh Otto Niederfrequenz-Induktions-Rinnenofen zum Schmelzen und/oder Warmhalten von Metallen
US3844453A (en) * 1973-01-05 1974-10-29 Modern Equipment Co Apparatus and method for melting and pouring metal
DE3048220A1 (de) * 1980-01-24 1981-09-24 Stopinc AG, 6340 Baar "einrichtung zum vergiessen von metallschmelzen"
DE19504415A1 (de) * 1994-06-24 1996-01-04 Nippon Denso Co Warmhalteofen für eine Metallschmelze und Verfahren zur Aufnahme von Metallschmelze in einem derartigen Ofen
US5662859A (en) * 1995-04-26 1997-09-02 Toshiba Kikai Kabushiki Kaisha Constant molten metal surface level retaining furnace integrally provided with melting unit
US20020185789A1 (en) * 2001-06-11 2002-12-12 Alcoa Inc. Molten metal dosing furnace with metal treatment and level control and method
DE10256513A1 (de) * 2002-12-04 2004-06-24 Ing. Rauch Fertigungstechnik Ges.M.B.H. Verfahren zum Schmelzen eines Metalles und Vorrichtung zur Durchführung des Verfahrens
DE102017102924B3 (de) 2017-02-14 2018-03-08 Otto Junker Gmbh Induktionstiegelofen zum Schmelzen von metallischem Einsatzgut und Verfahren zum Sauberhalten des Sockelbereichs eines Induktionstiegelofens
DE102021121030A1 (de) 2021-08-12 2023-02-16 Otto Junker Gesellschaft mit beschränkter Haftung Vorrichtung zur induktiven Erwärmung einer Metallschmelze, Mehrkammerschmelzofen zum Schmelzen von Schrott aus Metall und Verfahren zum Schmelzen von Schrott aus Metall

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1583460A1 (de) 1967-08-29 1970-08-06 Junker Dr Ing Eh Otto Niederfrequenz-Induktions-Rinnenofen zum Schmelzen und/oder Warmhalten von Metallen
US3844453A (en) * 1973-01-05 1974-10-29 Modern Equipment Co Apparatus and method for melting and pouring metal
DE3048220A1 (de) * 1980-01-24 1981-09-24 Stopinc AG, 6340 Baar "einrichtung zum vergiessen von metallschmelzen"
DE19504415A1 (de) * 1994-06-24 1996-01-04 Nippon Denso Co Warmhalteofen für eine Metallschmelze und Verfahren zur Aufnahme von Metallschmelze in einem derartigen Ofen
US5662859A (en) * 1995-04-26 1997-09-02 Toshiba Kikai Kabushiki Kaisha Constant molten metal surface level retaining furnace integrally provided with melting unit
US20020185789A1 (en) * 2001-06-11 2002-12-12 Alcoa Inc. Molten metal dosing furnace with metal treatment and level control and method
DE10256513A1 (de) * 2002-12-04 2004-06-24 Ing. Rauch Fertigungstechnik Ges.M.B.H. Verfahren zum Schmelzen eines Metalles und Vorrichtung zur Durchführung des Verfahrens
DE102017102924B3 (de) 2017-02-14 2018-03-08 Otto Junker Gmbh Induktionstiegelofen zum Schmelzen von metallischem Einsatzgut und Verfahren zum Sauberhalten des Sockelbereichs eines Induktionstiegelofens
DE102021121030A1 (de) 2021-08-12 2023-02-16 Otto Junker Gesellschaft mit beschränkter Haftung Vorrichtung zur induktiven Erwärmung einer Metallschmelze, Mehrkammerschmelzofen zum Schmelzen von Schrott aus Metall und Verfahren zum Schmelzen von Schrott aus Metall

Also Published As

Publication number Publication date
CN121713036A (zh) 2026-03-20
EP4724754A1 (fr) 2026-04-15
DE102023115104A1 (de) 2024-12-12

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