EP0944448B1 - Inductor in a fusion tank - Google Patents

Inductor in a fusion tank Download PDF

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Publication number
EP0944448B1
EP0944448B1 EP97949973A EP97949973A EP0944448B1 EP 0944448 B1 EP0944448 B1 EP 0944448B1 EP 97949973 A EP97949973 A EP 97949973A EP 97949973 A EP97949973 A EP 97949973A EP 0944448 B1 EP0944448 B1 EP 0944448B1
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EP
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Prior art keywords
use according
cooling fluid
cooling
melt
field
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EP97949973A
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German (de)
French (fr)
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EP0944448A1 (en
Inventor
Raimund Brückner
Daniel Grimm
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Didier Werke AG
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Didier Werke AG
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
    • G08B13/2408—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using ferromagnetic tags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/60—Pouring-nozzles with heating or cooling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H01F1/153—Amorphous metallic alloys, e.g. glassy metals
    • H01F1/15316—Amorphous metallic alloys, e.g. glassy metals based on Co
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H05B6/42—Cooling of coils

Definitions

  • the invention relates to the use of an inductor Generation of an alternating electromagnetic field after Preamble of claim 1.
  • the induction coil consists of several side by side lying electrically switchable independently Areas whose turns a fill pipe helical surrounded and which when the current flow solidified in it Liquefy melt by induction.
  • the areas have cavities, which with a coolant, such as Cooling liquid or gas, e.g. Fed water or air become.
  • From US-A-4 972 899 is an apparatus for casting Molten metal from a tundish into a mold over one Connection tube known.
  • In the wall there are at least embedded two helical cooling tubes, which intermittently or cyclically independently with one another Cooling fluid can be acted upon.
  • Each cooling tube is with one separate AC power connection to also as Serve heater.
  • the device becomes like this operated that after a predetermined cooling time respective cooling fluid switched off and alternating current to the respective cooling tube is applied to reheat the Molten metal in the associated connecting pipe section initiate.
  • an inductor is connected to a control and Closure device of a metallurgical vessel known the one stator arranged in a vessel wall and one in this to throttle or shut off the melt flow rotatable rotor (tube-in-tube closure system).
  • the Cooling takes place using a single cooling fluid.
  • cooling fluid is usually compressed air used to prevent leakage, for example through Wear of the vessel wall, not a dangerous one Development of water vapor or detonating gas can occur.
  • GB-A-2 279 543 describes a two-part inductor separate electrical connections to the outlet member Melting vessel.
  • the object of the invention is to use an inductor to propose the type mentioned at the beginning, with which a Adaptation to different cooling requirements possible is.
  • the inductor has different areas with separate It has inlets and outlets for cooling fluid possible to use these areas simultaneously with different To apply cooling fluids. It is also possible that different areas, each one at a time with different ones To apply cooling fluids. This allows the cooling in the individual areas the respective requirements there be adjusted.
  • the danger zone lies where the inductor is located in the melt vessel Melt is closest because there is wear of the wall and / or cracking in the wall of the melt vessel Melt may reach the inductor. In one other area can be cooled with water or steam become.
  • the different cooling fluids are preferably liquid gas, or dry ice, or water, or water vapor, or gas, or Compressed air.
  • gases as the cooling fluid can also adapt to a cooling capacity required is variable adjustable ratio of several gases, for example Compressed air and supercooled air or nitrogen or carbon dioxide or oxygen or the like can be used.
  • the electromagnetic generated by it Use alternating field for various functions.
  • the areas of the inductor are preferably different electrical frequencies and / or electrical Services can be charged depending on the purpose of the respective area.
  • the figure shows an inductor in a tube-in-tube screw cap trained outlet organ at the bottom of a Melting vessel.
  • a pipe-in-pipe closure system R built-in. It has a perforated brick 2, in which means a holding device 3 a stator 4 made of refractory, ceramic material is attached.
  • a Rotor 6 made of refractory, ceramic material rotatable stored.
  • a melt outlet channel 8 designed, which by turning the rotor more or less or not to cover with a melt inlet opening 5 of the stator 4 are brought, whereby the melt discharge controllable e.g. is interruptible.
  • the stator 4 is from a coil-shaped inductor 9 enclosed, which is installed in the perforated brick 2 and bears on the stator 4 via insulation 10.
  • the inductor 9 consists of a hollow chamber-shaped metal profile and is connected to an electrical frequency converter 11, whose frequency and / or power is adjustable.
  • the inductor 9 is responsible for guiding cooling fluid serving hollow chamber profile in an upper region 12 and in divided a lower area 13.
  • the upper area 12 is closer to the melt S. Er in the vessel is close to a danger zone G, in which wear and tear during operation or crack formation is to be feared.
  • the lower area 13 is further away from this danger zone.
  • the upper Area 12 has a feed 14 and a discharge 15 for a cooling fluid.
  • the lower area 13 has a feed 16 and a discharge 17 for another cooling fluid.
  • the a feed 14 is from a first coolant source 18 fed.
  • the coolant for the upper region 12 is a gas especially compressed air.
  • the cooling fluid for the lower area 13 is liquid gas, or dry ice, or water, or water vapor. Depending on the application, however, the cooling fluids are also interchangeable. From the first coolant source 18 or the The regions 12, 13 can be provided by the second coolant source 19 independently of each other with regard to the type of cooling fluid and cooling capacity.
  • the inductor 9 can as well as it with regard to cooling is divided into areas 12, 13, also electrically in different areas. These are different Frequencies and / or services can be created. Accordingly is in the figure at the lower region 13 Frequency converter or converter 11 by means of electrical Connections 21, 22 and another to the upper region 12 Frequency converter or converter 20 by means of electrical Connections 23, 24 connected. The frequencies and / or The power of the converter or converter 11, 20 can be adjusted.
  • the upper region 12 in particular becomes inductive Heating of the melt flowing through the outlet channel 8 used.
  • the melt if necessary, by heat conduction or heat radiation is heated.
  • the cooling is done to protect the inductor before overheating and possibly to dissipate heat its surroundings.
  • the lower region 13 can also be used for inductive heating use the melt flowing through the outlet channel 8. Its cooling can be done by appropriate choice of the cooling fluid and / or its throughput speed may be stronger than in upper area 12. Due to intensive cooling there is also one Heat dissipation from the environment, the perforated brick possible.
  • the lower region 13 can also be used as a reference coil or Reference field for a temperature measurement of the outlet channel 8 flowing melt or for the detection of slag serve in the flow channel 8. Another (not shown) (receiver) coil required.
  • the lower Area 13 is in this case to a (not shown) Measuring device connected. Because the electrical properties, especially the conductivity, the melt are temperature dependent, they influence the reference field of the lower area 13 different depending on the temperature what is recorded and evaluated by the measuring device. The same also applies to slag detection because slag is a has different electrical conductivity than the melt. Also the cooling of the area 13 can be independent of the Cooling in the range 12 can be selected.
  • the lower region 13 can also be used to generate a Use directed electromagnetic field that in the a melt component that has penetrated into the gap 7, for example generated, which counteracts the melt flow. This seals the gap 7. A In this case, intensive cooling is cheap because it is high electrical power required to generate the force component are.
  • the inductor described can also be used with others Spouts in the wall or bottom of a metallurgical Vessel for pouring liquid metals, in particular Steel, use. But it can also in devices for Slag tapping in waste incineration plants, for example be used.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Computer Security & Cryptography (AREA)
  • Furnace Details (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Discharge Heating (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • General Induction Heating (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

PCT No. PCT/DE97/02784 Sec. 371 Date Jun. 4, 1999 Sec. 102(e) Date Jun. 4, 1999 PCT Filed Nov. 28, 1997 PCT Pub. No. WO98/25718 PCT Pub. Date Jun. 18, 1998An inductor is used to generate an electromagnetic AC field at a pipe-in-pipe discharge element of a metallurgical vessel. The inductor has at least two cooling fluid regions for the flow of cooling fluid therethrough. First supply and drain lines are connected to a first of the cooling fluid regions for supplying the first cooling fluid thereto. Second supply and drain lines are connected to a second region. The second cooling fluid is different than the first cooling fluid so that separate regions can be separately cooled with different cooling fluids having different properties.

Description

Die Erfindung betrifft die Verwendung eines Induktors zur Erzeugung eines elektromagnetischen Wechselfeldes nach dem Oberbegriff des Anspruchs 1.The invention relates to the use of an inductor Generation of an alternating electromagnetic field after Preamble of claim 1.

Eine derartige Verwendung ist aus der DE-A-2 433 582 bekannt. Die Induktionsspule besteht dort aus mehreren nebeneinander liegenden elektrisch voneinander unabhängig schaltbaren Bereichen, deren Windungen ein Füllrohr schraubenlinienförmig umgeben und welche bei Stromfluss die in diesem erstarrte Schmelze durch Induktion verflüssigen sollen. Die Bereiche weisen Hohlräume auf, welche mit einem Kühlmittel, wie Kühlflüssigkeit oder Kühlgas, z.B. Wasser oder Luft beschickt werden.Such a use is known from DE-A-2 433 582. There, the induction coil consists of several side by side lying electrically switchable independently Areas whose turns a fill pipe helical surrounded and which when the current flow solidified in it Liquefy melt by induction. The areas have cavities, which with a coolant, such as Cooling liquid or gas, e.g. Fed water or air become.

Aus der US-A-4 972 899 ist eine Vorrichtung zum Gießen von Metallschmelze aus einem Tundish in eine Kokille über ein Verbindungsrohr bekannt. In dessen Wandung sind mindestens zwei schraubenlinienförmige Kühlrohre eingebettet, welche intermittierend oder zyklisch unabhängig voneinander mit einem Kühlfluid beaufschlagbar sind. Jedes Kühlrohr ist mit einem gesonderten Wechselstromanschluss versehen, um auch als Heizvorrichtung zu dienen. Die Vorrichtung wird derart betrieben, dass nach einer vorbestimmten Kühlzeit das jeweilige Kühlfluid abgeschaltet und Wechselstrom an das jeweilige Kühlrohr angelegt wird, um ein Wiederaufheizen der Metallschmelze in dem zugeordneten Verbindungsrohrabschnitt einzuleiten.From US-A-4 972 899 is an apparatus for casting Molten metal from a tundish into a mold over one Connection tube known. In the wall there are at least embedded two helical cooling tubes, which intermittently or cyclically independently with one another Cooling fluid can be acted upon. Each cooling tube is with one separate AC power connection to also as Serve heater. The device becomes like this operated that after a predetermined cooling time respective cooling fluid switched off and alternating current to the respective cooling tube is applied to reheat the Molten metal in the associated connecting pipe section initiate.

Aus der DE-A-195 00 012 ist ein Induktor an einer Regel- und Verschlusseinrichtung eines metallurgischen Gefäßes bekannt, die einen in einer Gefäßwandung angeordneten Stator und einen in diesem zum Drosseln oder Absperren der Schmelzenströmung drehbaren Rotor aufweist (Rohr-im-Rohr-Verschluss-System). Die Kühlung erfolgt mittels eines einzigen Kühlfluids. Als Kühlfluid wird aus Sicherheitsgründen gewöhnlich Druckluft verwendt, damit es bei Leckagen, beispielsweise durch Verschleiß der Gefäßwandung, nicht zu einer gefährlichen Wasserdampfentwicklung bzw. Knallgasbildung kommen kann.From DE-A-195 00 012 an inductor is connected to a control and Closure device of a metallurgical vessel known the one stator arranged in a vessel wall and one in this to throttle or shut off the melt flow rotatable rotor (tube-in-tube closure system). The Cooling takes place using a single cooling fluid. As For safety reasons, cooling fluid is usually compressed air used to prevent leakage, for example through Wear of the vessel wall, not a dangerous one Development of water vapor or detonating gas can occur.

Die GB-A-2 279 543 beschreibt einen zweiteiligen Induktor mit separaten elektrischen Anschlüssen an dem Auslassorgan eines Schmelzengefäßes. GB-A-2 279 543 describes a two-part inductor separate electrical connections to the outlet member Melting vessel.

Aufgabe der Erfindung ist es, die Verwendung eines Induktors der eingangs genannten Art vorzuschlagen, mit welcher eine Anpassung an unterschiedliche Kühlungserfordernisse möglich ist.The object of the invention is to use an inductor to propose the type mentioned at the beginning, with which a Adaptation to different cooling requirements possible is.

Erfindungsgemäß wird diese Aufgabe mit den Merkmalen des Anspruchs 1 gelöst.According to the invention, this object is achieved with the features of claim 1 solved.

Dadurch, dass der Induktor verschiedene Bereiche mit getrennten Zu- und Abführungen für Kühlfluid aufweist, ist es möglich, diese Bereiche gleichzeitig mit verschiedenen Kühlfluids zu beaufschlagen. Auch ist es möglich, die verschiedenen Bereiche, jeweils, nacheinander mit unterschiedlichen Kühlfluids zu beaufschlagen. Dadurch kann die Kühlung in den einzelnen Bereichen den jeweils dortigen Erfordernissen angepasst werden. Insbesondere ist es möglich, die Kühlung in einem einer Gefahrenzone nahen Bereich, in der die Verwendung von Wasser als Kühlmittel zu gefährlich ist, mittels eines Gases, insbesondere Luft vorzunehmen. Die Gefahrenzone liegt dort, wo der Induktor der in dem Schmelzengefäß befindlichen Schmelze am nächsten liegt, weil dort durch Verschleiß der Wandung und/oder Rissbildung in der Wandung des Schmelzengefäßes Schmelze möglicherweise bis an den Induktor gelangt. In einem anderen Bereich kann mit Wasser oder Wasserdampf gekühlt werden.Because the inductor has different areas with separate It has inlets and outlets for cooling fluid possible to use these areas simultaneously with different To apply cooling fluids. It is also possible that different areas, each one at a time with different ones To apply cooling fluids. This allows the cooling in the individual areas the respective requirements there be adjusted. In particular, it is possible to cool in an area close to a danger zone in which the use of water as a coolant is too dangerous, by means of a Gases, especially air. The danger zone lies where the inductor is located in the melt vessel Melt is closest because there is wear of the wall and / or cracking in the wall of the melt vessel Melt may reach the inductor. In one other area can be cooled with water or steam become.

Für dem jeweiligen Bereich des Induktors lässt sich immer dasjenige Kühlfluid verwenden, das für seine Kühlung und die Kühlung seiner Umgebung jeweils am geeignetsten ist. Die unterschiedlichen Kühlfluids sind vorzugsweise Flüssiggas, oder Trockeneis, oder Wasser, oder Wasserdampf, oder Gas, oder Druckluft. Bei der vor allem in Gefahrenzonen bevorzugten Verwendung von Gasen als Kühlfluid kann auch zur Anpassung an eine jeweils erforderliche Kühlleistung ein veränderlich einstellbares Verhältnis von mehreren Gasen, beispielsweise Druckluft und unterkühlte Luft oder Stickstoff oder Kohlendioxid oder Sauerstoff oder dergleichen verwendet werden. For the respective area of the inductor you can always use the cooling fluid that is used for its cooling and Cooling its environment is most appropriate. The different cooling fluids are preferably liquid gas, or dry ice, or water, or water vapor, or gas, or Compressed air. With the preferred especially in danger zones Use of gases as the cooling fluid can also adapt to a cooling capacity required is variable adjustable ratio of several gases, for example Compressed air and supercooled air or nitrogen or carbon dioxide or oxygen or the like can be used.

Durch die Verwendung unterschiedlicher Kühlfluids und damit unterschiedlicher Kühlleistungen in den einzelnen Bereichen des Induktors lässt sich das von diesem erzeugte elektromagnetische Wechselfeld für verschiedene Funktionen nutzen. Diese sind insbesondere das induktive Aufheizen und/oder die Erzeugung eines Referenzfeldes für eine Temperaturmessung und/oder die Schlackendetektierung und/oder die Erzeugung eines gerichteten elektromagnetischen Feldes zur Ausübung einer Kraftkomponente auf die Schmelze, was beispielsweise für ein Spaltdichtung im Auslassorgan verwendet werden kann.By using different cooling fluids and thus different cooling capacities in the individual areas of the inductor, the electromagnetic generated by it Use alternating field for various functions. These are in particular inductive heating and / or Generation of a reference field for a temperature measurement and / or slag detection and / or generation a directed electromagnetic field for exercise a force component on the melt, for example for a gap seal can be used in the outlet element.

Vorzugsweise sind die Bereiche des Induktors mit unterschiedlichen elektrischen Frequenzen und/oder elektrischen Leistungen je nach Zweck des jeweiligen Bereichs beaufschlagbar.The areas of the inductor are preferably different electrical frequencies and / or electrical Services can be charged depending on the purpose of the respective area.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen und der folgenden Beschreibung eines Ausführungsbeispiels.Further advantageous embodiments of the invention result itself from the subclaims and the following description of an embodiment.

Die Figur zeigt einen Induktor bei einem als Rohr-im-Rohr-Drehverschluss ausgebildeten Auslassorgan am Boden eines Schmelzengefäßes.The figure shows an inductor in a tube-in-tube screw cap trained outlet organ at the bottom of a Melting vessel.

In einen Boden 1 eines Schmelzengefäßes, beispielsweise für eine Stahlschmelze, ist ein Rohr-im-Rohr-Verschluss-System R eingebaut. Es weist einen Lochstein 2 auf, in dem mittels einer Halteeinrichtung 3 ein Stator 4 aus feuerfestem, keramischem Material befestigt ist. In dem Stator 4 ist ein Rotor 6 aus feuerfestem, keramischem Material drehbar gelagert. Zwischen dem Stator 4 und dem Rotor 6 besteht ein Spalt 7. Innerhalb des Rotors 6 ist ein Schmelzenauslaufkanal 8 gestaltet, welcher durch Drehen des Rotors mehr oder weniger oder nicht zur Deckung mit einer Schmelzeneintrittsöffnung 5 des Stators 4 gebracht werden, wodurch der Schmelzenausfluss steuerbar zbw. unterbrechbar ist. In a bottom 1 of a melt vessel, for example for a molten steel, is a pipe-in-pipe closure system R built-in. It has a perforated brick 2, in which means a holding device 3 a stator 4 made of refractory, ceramic material is attached. In the stator 4 is a Rotor 6 made of refractory, ceramic material rotatable stored. There is a between the stator 4 and the rotor 6 Gap 7. Inside the rotor 6 is a melt outlet channel 8 designed, which by turning the rotor more or less or not to cover with a melt inlet opening 5 of the stator 4 are brought, whereby the melt discharge controllable e.g. is interruptible.

Der Stator 4 ist von einem spulenförmigen Induktor 9 umgschlossen, welcher in den Lochstein 2 eingebaut ist und über eine Isolierung 10 an dem Stator 4 anliegt. Der Induktor 9 besteht aus einem hohlkammerförmigen Metallprofil und ist an einen elektrischen Freuquenzumrichter 11 angeschlossen, dessen Frequenz und/oder Leistung einstellbar ist.The stator 4 is from a coil-shaped inductor 9 enclosed, which is installed in the perforated brick 2 and bears on the stator 4 via insulation 10. The inductor 9 consists of a hollow chamber-shaped metal profile and is connected to an electrical frequency converter 11, whose frequency and / or power is adjustable.

Der Induktor 9 ist bezüglich seines der Führung von Kühlfluid dienenden Hohlkammerprofils in einen oberen Bereich 12 und in einen unteren Bereich 13 aufgeteilt. Der obere Bereich 12 liegt näher bei der in dem Gefäß befindlichen Schmelze S. Er liegt nahe einer Gefahrenzone G, in der im Betrieb Verschleiß oder Rissbildung zu befürchten ist. Der untere Bereich 13 liegt weiter von dieser Gefahrenzone entfernt. Der obere Bereich 12 weist eine Zuführung 14 und eine Abführung 15 für ein Kühlfluid auf. Der untere Bereich 13 weist eine Zuführung 16 und eine Abführung 17 für ein anderes Kühlfuid auf. Die eine Zuführung 14 ist von einer ersten Kühlmittelquelle 18 gespeist. Das Kühlmittel für den oberen Bereich 12 ist ein Gas insbesondere Druckluft. Das Kühlfluid für den unteren Bereich 13 ist Flüssiggas, oder Trockeneis, oder Wassr, oder Wasserdampf. Je nach dem Einsatzfall sind die Kühlfluide jedoch auch austauschbar. Aus der ersten Kühlmittelquelle 18 bzw. der zweiten Kühlmittelquelle 19 lassen sich die Bereiche 12, 13 unabhängig voneinander hinsichtlich der Art des Kühlfluids und der Kühlleistung kühlen.The inductor 9 is responsible for guiding cooling fluid serving hollow chamber profile in an upper region 12 and in divided a lower area 13. The upper area 12 is closer to the melt S. Er in the vessel is close to a danger zone G, in which wear and tear during operation or crack formation is to be feared. The lower area 13 is further away from this danger zone. The upper Area 12 has a feed 14 and a discharge 15 for a cooling fluid. The lower area 13 has a feed 16 and a discharge 17 for another cooling fluid. The a feed 14 is from a first coolant source 18 fed. The coolant for the upper region 12 is a gas especially compressed air. The cooling fluid for the lower area 13 is liquid gas, or dry ice, or water, or water vapor. Depending on the application, however, the cooling fluids are also interchangeable. From the first coolant source 18 or the The regions 12, 13 can be provided by the second coolant source 19 independently of each other with regard to the type of cooling fluid and cooling capacity.

Der Induktor 9 kann ebenso, wie er hinsichtlich der Kühlung in Bereiche 12, 13 aufgeteilt ist, auch elektrisch in verschiedene Bereiche aufgeteilt sein. An diese sind unterschiedliche Frequenzen und/oder Leistungen anlegbar. Dementsprechend ist in der Figur an den unteren Bereich 13 ein Frequenzumrichter oder Umformer 11 mittels elektrischer Anschlüsse 21, 22 und an den oberen Bereich 12 ein weiterer Frequenzumrichter oder Umformer 20 mittels elektrischer Anschlüsse 23, 24 angeschlossen. Die Frequenzen und/oder Leistungen der Umrichter oder Umformer 11, 20 sind einstellbar.The inductor 9 can as well as it with regard to cooling is divided into areas 12, 13, also electrically in different areas. These are different Frequencies and / or services can be created. Accordingly is in the figure at the lower region 13 Frequency converter or converter 11 by means of electrical Connections 21, 22 and another to the upper region 12 Frequency converter or converter 20 by means of electrical Connections 23, 24 connected. The frequencies and / or The power of the converter or converter 11, 20 can be adjusted.

Insbesondere der obere Bereich 12 wird zum induktiven Aufheizen der den Auslaufkanal 8 durchströmenden Schmelze verwendet. Hierbei kann entweder die Stahlschmelze selbst oder der Rotor 6 und/oder der Stator 4 an das elektromagnetische Wechselfeld des Induktors 9 ankoppeln, wobei die Schmelze gegebenenfalls durch Wärmeleitung oder Wärmestrahlung aufgeheizt wird. Die Kühlung erfolgt zum Schutze des Induktors vor Überhitzung und gegebenenfalls zur Ableitung von Wärme aus dessen Umgebung.The upper region 12 in particular becomes inductive Heating of the melt flowing through the outlet channel 8 used. Here, either the molten steel itself or the rotor 6 and / or the stator 4 to the electromagnetic Coupling the alternating field of the inductor 9, the melt if necessary, by heat conduction or heat radiation is heated. The cooling is done to protect the inductor before overheating and possibly to dissipate heat its surroundings.

Auch der untere Bereich 13 lässt sich zum induktiven Aufheizen der den Auslaufkanal 8 durchströmenden Schmelze verwenden. Seine Kühlung kann durch entsprechende Wahl des Kühlfluids und/oder dessen Durchlaufgeschwindigkeit stärker sein als im oberen Bereich 12. Durch intensive Kühlung ist auch hier eine Wärmeableitung aus der Umgebung, dem Lochstein möglich.The lower region 13 can also be used for inductive heating use the melt flowing through the outlet channel 8. Its cooling can be done by appropriate choice of the cooling fluid and / or its throughput speed may be stronger than in upper area 12. Due to intensive cooling there is also one Heat dissipation from the environment, the perforated brick possible.

Der untere Bereich 13 kann auch als Referenzspule bzw. Referenzfeld für eine Temperaturmessung der den Auslaufkanal 8 durchströmenden Schmelze oder für die Erkennung von Schlacke in dem Durchlaufkanal 8 dienen. Hierzu ist eine weitere (nicht dargestellte) (Empfänger)-Spule erforderlich. Der untere Bereich 13 ist in diesem Fall an eine (nicht dargestellte) Messeinrichtung angeschlossen. Da die elektrischen Eigenschaften, insbesondere die Leitfähigkeit, der Schmelze temperaturabhängig sind, beeinflussen sie das Referenzfeld des unteren Bereichs 13 je nach Temperatur unterschiedlich, was von der Messeinrichtung erfasst und ausgewertet wird. Gleiches gilt auch für die Schlackenerkennung, weil Schlacke eine andere elektrische Leitfähigkeit als die Schmelze hat. Auch dabei kann die Kühlung des Bereichs 13 unabhängig von der Kühlung im Bereich 12 gewählt werden. The lower region 13 can also be used as a reference coil or Reference field for a temperature measurement of the outlet channel 8 flowing melt or for the detection of slag serve in the flow channel 8. Another (not shown) (receiver) coil required. The lower Area 13 is in this case to a (not shown) Measuring device connected. Because the electrical properties, especially the conductivity, the melt are temperature dependent, they influence the reference field of the lower area 13 different depending on the temperature what is recorded and evaluated by the measuring device. The same also applies to slag detection because slag is a has different electrical conductivity than the melt. Also the cooling of the area 13 can be independent of the Cooling in the range 12 can be selected.

Der untere Bereich 13 lässt sich auch zur Erzeugung eines gerichteten elektromagnetischen Feldes verwenden, das in der etwa in den Spalt 7 eingedrungenen Schmelze eine Kraftkomponente erzeugt, die dem Schmelzenfluss entgegenwirkt. Dadurch ist eine Abdichtung des Spaltes 7 erreicht. Eine intensive Kühlung ist in diesem Falle günstig, weil hohe elektrische Leistungen zur Erzeugung der Kraftkomponente nötig sind.The lower region 13 can also be used to generate a Use directed electromagnetic field that in the a melt component that has penetrated into the gap 7, for example generated, which counteracts the melt flow. This seals the gap 7. A In this case, intensive cooling is cheap because it is high electrical power required to generate the force component are.

Der beschriebene Induktor lässt sich auch bei anderen Ausgüssen in der Wandung oder im Boden eines metallurgischen Gefäßes zum Vergießen von flüssigen Metallen, insbesondere Stahl, verwenden. Er kann aber auch in Vorrichtungen zum Schlackenabstich in beispielsweise Müllverbrennungsanlagen eingesetzt werden.The inductor described can also be used with others Spouts in the wall or bottom of a metallurgical Vessel for pouring liquid metals, in particular Steel, use. But it can also in devices for Slag tapping in waste incineration plants, for example be used.

Claims (11)

  1. Use of an inductor for creating an electromagnetic alternating field at an outlet organ of a melting vessel which can be flowed through by a cooling fluid for cooling purposes and which comprises at least two areas (12, 13) having separate supply means and outlet means (14, 15; 16, 17) for a cooling fluid, characterized by the simultaneous admission of the various areas (12, 13) by different cooling fluids.
  2. Use according to claim 1, characterized in that the various areas (12, 13) are admitted by different cooling fluids, respectively, one after the other.
  3. Use according to claim 1 or 2, characterized in that the different cooling fluids are liquid gas, dry ice, water, water vapour or gas, in particular compressed air.
  4. Use according to one of the preceding claims, characterized in that the cooling fluid of the one area (13) is liquid gas, dry ice, water or water vapour and the cooling fluid of the other area (12) is gas, in particular compressed air.
  5. Use according to one of the preceding claims, characterized in that the different areas (12, 13) are admitted by different electrical frequencies and/or electrical power.
  6. Use according to one of the preceding claims, characterized in that the electromagnetic alternating field is used for inductive heating and as a reference field for a temperature measurement or detection of slag in at least one of the different areas (12, 13).
  7. Use according to one of the preceding claims, characterized in that the electromagnetic alternating field is used for inductive heating and/or for creating a reference field for a temperature measurement and/or detection of slag and/or for creating a directed electromagnetic field for execution of a power component onto the melt.
  8. Use according to one of the preceding claims, characterized in that an electromagnetic alternating field is used for inductive heating and another electromagnetic alternating field is used for creating a reference filed for a temperature measurement and/or a further electromagnetic alternating field is used for creating a reference field for detection of slag and still another electromagnetic alternating field for execution of a directed electriomagnetic field for execution of a power component onto the melt.
  9. Use according to one of the preceding claims at an outlet in the wall or bottom of a metallurgical vessel for pouring liquid metals, in particular steel.
  10. Use according to one of the preceding claims in a tube-in-tube locking system (R).
  11. Use according to claim 10, characterized in that the power component onto the melt in a ring gap (7) of the tube-in-tube locking system (R) is directed against the flow direction of the melt.
EP97949973A 1996-12-11 1997-11-28 Inductor in a fusion tank Expired - Lifetime EP0944448B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19651535A DE19651535C1 (en) 1996-12-11 1996-12-11 Inductor for a melt container
DE19651535 1996-12-11
PCT/DE1997/002784 WO1998025718A1 (en) 1996-12-11 1997-11-28 Inductor in a fusion tank

Publications (2)

Publication Number Publication Date
EP0944448A1 EP0944448A1 (en) 1999-09-29
EP0944448B1 true EP0944448B1 (en) 2002-02-20

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EP97949973A Expired - Lifetime EP0944448B1 (en) 1996-12-11 1997-11-28 Inductor in a fusion tank

Country Status (8)

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US (1) US6052403A (en)
EP (1) EP0944448B1 (en)
JP (1) JP2001505487A (en)
KR (1) KR20000057522A (en)
AT (1) ATE213440T1 (en)
AU (1) AU5309398A (en)
DE (3) DE19651535C1 (en)
WO (1) WO1998025718A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19819903C2 (en) * 1998-05-05 2000-09-14 Didier Werke Ag Fluid cooled electrical power line
DE10201355A1 (en) * 2002-01-16 2003-07-31 C G Aneziris Parts, linings and protective layers of machines comprise ceramic materials having electrical and/or electrochemical functional properties improved by contacting with melts, gases and/or solid particles
JP4660343B2 (en) * 2004-11-24 2011-03-30 新日本製鐵株式会社 Nozzle heating device for molten metal injection
EP3326735B1 (en) 2016-11-29 2020-07-22 Refractory Intellectual Property GmbH & Co. KG Method and device for the detection of quantities in the outlet of a metallurgical vessel

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US1681950A (en) * 1923-07-13 1928-08-28 Ajax Electrothermic Corp Multiple-path water-cooled furnace
US2277223A (en) * 1941-04-26 1942-03-24 Induction Heating Corp Electric induction furnace
US3014255A (en) * 1957-11-15 1961-12-26 Heraeus Gmbh W C Method of operating vacuum induction furnace
DE2433582A1 (en) * 1973-08-10 1975-02-27 Grohe Armaturen Friedrich Gravity-casting of metals - using runner surrounded by an induction heating coil to start and stop metal flow
FR2518239B1 (en) * 1981-12-15 1986-06-27 Air Liquide METHOD AND DEVICE FOR SINTERING REFRACTORY WALLS
DE3439369A1 (en) * 1984-10-27 1986-04-30 AMP Angewandte Meßtechnik und Prozeßsteuerung GmbH, 5100 Aachen METHOD AND DEVICE FOR DETECTING SLAG
DE3722795A1 (en) * 1987-07-10 1989-01-19 Amepa DEVICE FOR DETECTING SLAG FLOWING IN A FLOW OF A METAL MELT
US4972899A (en) * 1990-01-02 1990-11-27 Olin Corporation Method and apparatus for casting grain refined ingots
DE4125916A1 (en) * 1991-08-05 1993-02-11 Didier Werke Ag METHOD FOR INDUCTINGLY HEATING CERAMIC MOLDED PARTS
DE4320766C2 (en) * 1993-06-23 2002-06-27 Ald Vacuum Techn Ag Device for melting a solid layer of electrically conductive material
DE4428297A1 (en) * 1994-08-10 1996-02-15 Didier Werke Ag Refractory nozzle for pouring molten metal from a vessel
DE19500012A1 (en) * 1995-01-02 1996-07-04 Didier Werke Ag Control and closure device for a metallurgical vessel
DE19603317A1 (en) * 1995-08-28 1997-03-06 Didier Werke Ag Method for operating an inductor and inductor for carrying out the method
JP2954896B2 (en) * 1997-01-09 1999-09-27 核燃料サイクル開発機構 Device for extracting melt from cold crucible induction melting furnace

Also Published As

Publication number Publication date
US6052403A (en) 2000-04-18
WO1998025718A1 (en) 1998-06-18
DE59706455D1 (en) 2002-03-28
AU5309398A (en) 1998-07-03
DE19651535C1 (en) 1998-04-30
KR20000057522A (en) 2000-09-25
ATE213440T1 (en) 2002-03-15
DE19781390D2 (en) 1999-11-11
JP2001505487A (en) 2001-04-24
EP0944448A1 (en) 1999-09-29

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