EP0755740A1 - Method and apparatus for induction heating of a refractory article - Google Patents
Method and apparatus for induction heating of a refractory article Download PDFInfo
- Publication number
- EP0755740A1 EP0755740A1 EP96110899A EP96110899A EP0755740A1 EP 0755740 A1 EP0755740 A1 EP 0755740A1 EP 96110899 A EP96110899 A EP 96110899A EP 96110899 A EP96110899 A EP 96110899A EP 0755740 A1 EP0755740 A1 EP 0755740A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- molded part
- interior
- insulation
- inductor
- inner inductor
- 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.)
- Granted
Links
Images
Classifications
-
- 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
- B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
- B22D41/01—Heating means
- B22D41/015—Heating means with external heating, i.e. the heat source not being a part of the ladle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
-
- 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
-
- 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
- H05B6/38—Coil arrangements specially adapted for fitting into hollow spaces of workpieces
Definitions
- the invention relates to a method for inductively heating a refractory molded part which has a channel-shaped interior. Furthermore, the invention relates to a device for performing the method.
- Such molded parts are in particular part of a melt outlet device or melt feed device in a metallurgical vessel. They are preheated in order to prevent the melt flowing through it from cooling down, in particular freezing it.
- DE 38 42 690 A1 shows a refractory spout for a continuous caster.
- the spout is surrounded on the outside by an induction coil with which the inner outer wall can be heated inductively in a controlled manner.
- the coil is part of the pouring component. This is complex and expensive, which is particularly important because such refractory pouring parts are wearing parts.
- Fireproof pouring moldings are usually heated by means of gas burners. This has the disadvantage that it can burn out the carbon, which is a material component of the molded part. It is also unfavorable that there is an uneven temperature distribution in the molded part during heating. For example, temperature differences of about 400 K were observed. It also takes a considerable amount of time to heat up.
- the object of the invention is to enable rapid and uniform heating of the refractory molded part.
- the above object is achieved in a method of the type mentioned in the introduction that an internal inductor is introduced into the interior of the refractory molded part, that the molded part is heated by means of the internal inductor and then the internal inductor is removed from the internal space.
- the refractory molded part is heated up rapidly and uniformly, which is, for example, a feed and metering system for a belt or twin roll caster, with which the melt outflow can be interrupted and / or controlled or regulated.
- the invention achieves increased plant availability because freezing problems are avoided.
- the method and the device are suitable not only for heating during casting, but also for heating during interruptions in casting in order to keep the molded part at a suitable temperature.
- a device for performing the method is characterized in that the internal inductor is formed from one or more cooled induction coils.
- the figure shows a fireproof molded part as a feed channel for a twin-roll caster with an internal inductor inserted.
- a feed channel which is known in its form, is a refractory molded part (1) made of a ceramic, carbon-containing material, which can be inductively coupled to an alternating electrical field, which results in heating.
- the feed channel has a channel-shaped interior (2) with a rectangular cross section.
- the supply duct is provided in an outer partial area with a metallic outer jacket (3), as is often used when using so-called ETA changers.
- the metallic outer jacket (3) therefore shields electromagnetic fields from the supply channel, so that the supply channel could not be heated uniformly with an external induction coil.
- an inner inductor (4) is inserted into the interior (2) with a rectangular cross section.
- the dimensions of the inner inductor (4), in particular its length, are adapted to the interior (2) so that it extends as far as possible over the entire length of the interior (2).
- its outer geometry is adapted to the dimensions of the interior (2).
- the internal inductor (4) has a number of cooled induction coils (5) which are connected to a generator (6).
- the interior (2) is elastically and / or thermally insulated from the inner inductor (4) with a layer (12), for example a ceramic glaze, so that the refractory molded part (1) does not come into contact with parts carrying electrical voltage and / or no zonal overheating occurs.
- the outer surface of the inner inductor (4) is electrically and / or thermally insulated from the surfaces of the inner space (2) by means of an insulation molding (7).
- the inner inductor (4) is also advantageous to adapt the inner inductor (4) to different geometries or wall thicknesses such that there are different distances between the inner inductor (4) and the surfaces of the areas to be heated. With this measure, different energy densities are generated in the molded part (1), which improves the uniformity of the heating with different wall thicknesses.
- the molded insulation part (7) is to be designed accordingly.
- the molded insulation part (7) also serves to center the inner inductor (4) in the interior (2).
- the molded insulation part (7) is slid onto the induction coil (5) so that it can be replaced if necessary.
- the outer geometry of the molded insulation part (7) is adapted to the interior (2) in such a way that it can be easily inserted into the interior (2) and pulled out of the interior (2) with the interior inductor (4).
- the design can also be such that first the molded insulation part (7) is inserted into the interior (2) and then the internal inductor (4) into the molded insulation part (7).
- the molded insulation part (7) has a flange (8) at the top to limit insertion. It's open below. In other applications, e.g. in the case of supply ducts with lateral outflow openings, the insulation molded part (7) can be closed by means of a base.
- the inner inductor (4) is provided with an additional turn (10) above the flange (8).
- the molded insulation part (7) consists of a highly heat-resistant, ceramic fiber material or ceramic foam material.
- molded insulation part (7) it is not necessary for the molded insulation part (7) to extend over the entire length of the internal inductor (4). Two or more molded insulation parts can also be provided distributed.
- the molded insulation part (7) or the molded insulation parts need not be able to be pulled out of the interior (2). It is also possible to design the molded insulation part (7) or the molded insulation parts as the lining of the interior (2).
- the supply duct radiates heat to the outside, ie loses heat
- external insulation preferably made of ceramic fiber material or ceramic foam material. This improves the rapid and even heating of the feed channel.
- the internal inductor (4) with the molded insulation part (7) is inserted into the interior (2) and the generator (6) is switched on.
- the feed channel is inductively heated rapidly and uniformly over its entire cross section.
- the internal inductor (4) is pulled out of the supply duct. This is then pre-heated and ready for the casting operation.
- the inner inductor (4) can be used for many heating processes on many supply channels. Its use is therefore independent of the wear of the feed channel.
- the insulation molded part (7), if it is worn, can be pulled off the inner inductor (4) and replaced by a new insulation molded part. In the case of different cross sections of supply channels, molded insulation parts (7) with correspondingly different dimensions can be kept ready. This makes it possible to insert the inner inductor (4) in a centered manner even with different interior geometries.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
- Heat Treatment Of Articles (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Forging (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum induktiven Aufheizen eines feuerfesten Formteils, das einen kanalförmigen Innenraum aufweist. Weiterhin betrifft die Erfindung eine Vorrichtung zur Durchführung des Verfahrens.The invention relates to a method for inductively heating a refractory molded part which has a channel-shaped interior. Furthermore, the invention relates to a device for performing the method.
Solche Formteile sind insbesondere Teil einer Schmelzenauslaßvorrichtung bzw. Schmelzenaufgabevorrichtung bei einem metallurgischen Gefäß. Sie werden vorgeheizt, um ein unerwünschtes Abkühlen der durchfließenden Schmelze, insbesondere deren Einfrieren, zu vermeiden.Such molded parts are in particular part of a melt outlet device or melt feed device in a metallurgical vessel. They are preheated in order to prevent the melt flowing through it from cooling down, in particular freezing it.
In der DE 38 42 690 A1 ist ein feuerfester Ausguß für eine Stranggießanlage gezeigt. Der Ausgußkanal ist außen von einer Induktionsspule umgeben, mit der die innere Außenwand geregelt induktiv aufheizbar ist. Die Spule ist Bestandteil des Ausgußbauteils. Dieses ist dadurch aufwendig und teuer, was insbesondere ins Gewicht fällt, weil solche feuerfesten Ausgußformteile Verschleißteile sind.DE 38 42 690 A1 shows a refractory spout for a continuous caster. The spout is surrounded on the outside by an induction coil with which the inner outer wall can be heated inductively in a controlled manner. The coil is part of the pouring component. This is complex and expensive, which is particularly important because such refractory pouring parts are wearing parts.
Üblicherweise werden feuerfeste Ausgußformteile mittels Gasbrennern aufgeheizt. Dies hat den Nachteil, daß es dabei zu einem Ausbrennen des Kohlenstoffs kommen kann, der Materialbestandteil des Formteils ist. Ungünstig ist dabei außerdem, daß es beim Aufheizen zu einer ungleichmäßigen Temperaturverteilung im Formteil kommt. Es wurden beispielsweise Temperaturunterschiede von etwa 400 K beobachtet. Darüber hinaus nimmt das Aufheizen eine beträchtliche Zeit in Anspruch.Fireproof pouring moldings are usually heated by means of gas burners. This has the disadvantage that it can burn out the carbon, which is a material component of the molded part. It is also unfavorable that there is an uneven temperature distribution in the molded part during heating. For example, temperature differences of about 400 K were observed. It also takes a considerable amount of time to heat up.
Aufgabe der Erfindung ist es, ein rasches und gleichmäßiges Aufheizen des feuerfesten Formteils zu ermöglichen.The object of the invention is to enable rapid and uniform heating of the refractory molded part.
Erfindungsgemäß ist obige Aufgabe bei einem Verfahren der eingangs genannten Art dadurch gelöst, daß in den Innenraum des feuerfesten Formteils ein Inneninduktor eingebracht wird, daß mittels des Inneninduktors das Formteil aufgeheizt wird und danach der Inneninduktor aus dem Innenraum herausgenommen wird.According to the invention, the above object is achieved in a method of the type mentioned in the introduction that an internal inductor is introduced into the interior of the refractory molded part, that the molded part is heated by means of the internal inductor and then the internal inductor is removed from the internal space.
Dabei erfolgt ein rasches und gleichmäßiges Aufheizen des feuerfesten Formteils, das beispielsweise ein Zufuhr- und Dosiersystem für einen Belt- oder Twin-Roll-Caster ist, mit dem der Schmelzenausfluß unterbrechbar und/oder steuer- bzw. regelbar ist.The refractory molded part is heated up rapidly and uniformly, which is, for example, a feed and metering system for a belt or twin roll caster, with which the melt outflow can be interrupted and / or controlled or regulated.
Durch die Erfindung ist eine erhöhte Anlagenverfügbarkeit erreicht, weil Einfrierprobleme vermieden werden. Das Verfahren und die Vorrichtung eignen sich nicht nur zum Aufheizen beim Angießen, sondern auch zum Aufheizen bei Gießunterbrechungen, um das Formteil auf einer geeigneten Temperatur zu halten.The invention achieves increased plant availability because freezing problems are avoided. The method and the device are suitable not only for heating during casting, but also for heating during interruptions in casting in order to keep the molded part at a suitable temperature.
Eine Vorrichtung zur Durchführung des Verfahrens zeichnet sich dadurch aus, daß der Inneninduktor aus einer oder mehreren gekühlten Induktionsspulen gebildet ist.A device for performing the method is characterized in that the internal inductor is formed from one or more cooled induction coils.
Vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen und der folgenden Beschreibung eines Ausführungsbeispiels.Advantageous embodiments of the invention result from the subclaims and the following description of an exemplary embodiment.
Die Figur zeigt ein feuerfestes Formteil als Zufuhrkanal für einen Twin-Roll-Caster mit einem eingesetzten Inneninduktor.The figure shows a fireproof molded part as a feed channel for a twin-roll caster with an internal inductor inserted.
Ein in seiner Form an sich bekannter Zufuhrkanal ist ein feuerfestes Formteil (1) aus einem keramischen, kohlenstoffhaltigen Material, das induktiv an ein elektrisches Wechselfeld mit der Folge einer Aufheizung ankoppelbar ist. Der Zufuhrkanal weist einen kanalförmigen Innenraum (2) mit rechteckigem Querschnitt auf. Der Zufuhrkanal ist in einem äußeren Teilbereich mit einem metallischen Außenmantel (3) versehen, wie man ihn häufig beim Einsatz von sogenannten ETA-Wechslern verwendet. Der metallische Außenmantel (3) schirmt also elektromagnetische Felder gegenüber dem Zufuhrkanal ab, so daß der Zufuhrkanal mit einer äußeren Induktionsspule nicht gleichmäßig aufheizbar wäre.A feed channel, which is known in its form, is a refractory molded part (1) made of a ceramic, carbon-containing material, which can be inductively coupled to an alternating electrical field, which results in heating. The feed channel has a channel-shaped interior (2) with a rectangular cross section. The supply duct is provided in an outer partial area with a metallic outer jacket (3), as is often used when using so-called ETA changers. The metallic outer jacket (3) therefore shields electromagnetic fields from the supply channel, so that the supply channel could not be heated uniformly with an external induction coil.
In dem in der Figur dargestellten Zustand ist in den Innenraum (2) mit rechteckigem Querschnitt ein Inneninduktor (4) eingeschoben. Der Inneninduktor (4) ist dabei in seinen Abmessungen, insbesondere in seiner Länge dem Innenraum (2) so angepaßt, daß er sich möglichst über die gesamte Länge des Innenraums (2) erstreckt. Außerdem ist seine Außengeometrie den Abmessungen des Innenraumes (2) angepaßt.In the state shown in the figure, an inner inductor (4) is inserted into the interior (2) with a rectangular cross section. The dimensions of the inner inductor (4), in particular its length, are adapted to the interior (2) so that it extends as far as possible over the entire length of the interior (2). In addition, its outer geometry is adapted to the dimensions of the interior (2).
Der Inneninduktor (4) weist mehrere gekühlte Induktionsspulen (5) auf, die an einen Generator (6) angeschlossen sind. Der Innenraum (2) ist gegenüber dem Inneninduktor (4) mit einer Schicht (12), beispielsweise einer keramischen Glasur, elastisch und/oder thermisch isoliert, damit das feuerfeste Formteil (1) nicht mit elektrische Spannung führenden Teilen in Berührung kommt und/oder keine zonale Überhitzung erfolgt.The internal inductor (4) has a number of cooled induction coils (5) which are connected to a generator (6). The interior (2) is elastically and / or thermally insulated from the inner inductor (4) with a layer (12), for example a ceramic glaze, so that the refractory molded part (1) does not come into contact with parts carrying electrical voltage and / or no zonal overheating occurs.
In einer weiteren Ausgestaltung der Erfindung ist die Außenfläche des Inneninduktors (4) mittels eines Isolationsformteils (7) gegenüber den Oberflächen des Innenraumes (2) elektrisch und/oder thermisch isoliert.In a further embodiment of the invention, the outer surface of the inner inductor (4) is electrically and / or thermally insulated from the surfaces of the inner space (2) by means of an insulation molding (7).
Vorteilhaft ist auch, den Inneninduktor (4) unterschiedlichen Geometrien oder Wandstärken anzupassen, dergestalt, daß verschiedene Abstände zwischen dem Inneninduktor (4) und den Oberflächen der aufzuheizenden Bereiche bestehen. Mit dieser Maßnahme werden unterschiedliche Energiedichten im Formteil (1) erzeugt, was die Gleichmäßigkeit der Aufheizung bei unterschiedlichen Wandstärken verbessert. Das Isolationsformteil (7) ist entsprechend zu gestalten.It is also advantageous to adapt the inner inductor (4) to different geometries or wall thicknesses such that there are different distances between the inner inductor (4) and the surfaces of the areas to be heated. With this measure, different energy densities are generated in the molded part (1), which improves the uniformity of the heating with different wall thicknesses. The molded insulation part (7) is to be designed accordingly.
Das Isolationsformteil (7) dient auch der Zentrierung des Inneninduktors (4) im Innenraum (2). Das Isolationsformteil (7) ist auf die Induktionsspule (5) reibschlüssig aufgeschoben, so daß es im Bedarfsfall auswechselbar ist. Die Außengeometrie des Isolationsformteils (7) ist so an den Innenraum (2) angepaßt, daß es mit dem Inneninduktor (4) leicht in den Innenraum (2) einschiebbar und aus dem Innenraum (2) herausziehbar ist. Die Gestaltung kann jedoch auch so getroffen sein, daß zunächst das Isolationsformteil (7) in den Innenraum (2) und dann der Inneninduktor (4) in das Isolationsformteil (7) einzuschieben ist.The molded insulation part (7) also serves to center the inner inductor (4) in the interior (2). The molded insulation part (7) is slid onto the induction coil (5) so that it can be replaced if necessary. The outer geometry of the molded insulation part (7) is adapted to the interior (2) in such a way that it can be easily inserted into the interior (2) and pulled out of the interior (2) with the interior inductor (4). However, the design can also be such that first the molded insulation part (7) is inserted into the interior (2) and then the internal inductor (4) into the molded insulation part (7).
Das Isolationsformteil (7) weist oben zur Begrenzung des Einschiebens einen Flansch (8) auf. Unten ist es offen. Bei anderen Anwendungen, z.B. bei Zufuhrkanälen mit seitlichen Ausströmöffnungen kann das Isolationsformteil (7) mittels eines Bodens verschlossen sein.The molded insulation part (7) has a flange (8) at the top to limit insertion. It's open below. In other applications, e.g. in the case of supply ducts with lateral outflow openings, the insulation molded part (7) can be closed by means of a base.
Um den Zufuhrkanal auch in seinem erweiterten Kopfbereich (9) aufzuheizen, ist der Inneninduktor (4) oberhalb des Flansches (8) mit einer zusätzlichen Windung (10) versehen.In order to heat up the supply channel also in its enlarged head area (9), the inner inductor (4) is provided with an additional turn (10) above the flange (8).
Das Isolationsformteil (7) besteht aus einem hochhitzebeständigen, keramischen Fasermaterial oder keramischen Schaummaterial.The molded insulation part (7) consists of a highly heat-resistant, ceramic fiber material or ceramic foam material.
Es ist nicht notwendig, daß sich das Isolationsformteil (7) über die gesamte Länge des Inneninduktors (4) erstreckt. Es können auch zwei oder mehrere Isolationsformteile verteilt vorgesehen sein.It is not necessary for the molded insulation part (7) to extend over the entire length of the internal inductor (4). Two or more molded insulation parts can also be provided distributed.
Das Isolationsformteil (7) bzw. die Isolationsformteile müssen nicht aus dem Innenraum (2) herausziehbar sein. Es ist auch möglich, das Isolationsformteil (7) bzw. die Isolationsformteile als Auskleidung des Innenraums (2) zu gestalten.The molded insulation part (7) or the molded insulation parts need not be able to be pulled out of the interior (2). It is also possible to design the molded insulation part (7) or the molded insulation parts as the lining of the interior (2).
Um zu vermeiden, daß der Zufuhrkanal beim Aufheizen Wärme nach außen abstrahlt, d.h. verliert, kann er mit einer Außenisolierung (11), vorzugsweise aus keramischem Fasermaterial oder keramischem Schaummaterial versehen sein. Diese verbessert die rasche und gleichmäßige Aufheizung des Zufuhrkanals.In order to avoid that the supply duct radiates heat to the outside, ie loses heat, it can be provided with external insulation (11), preferably made of ceramic fiber material or ceramic foam material. This improves the rapid and even heating of the feed channel.
Soll der Zufuhrkanal aufgeheizt werden, dann wird der Inneninduktor (4) mit dem Isolationsformteil (7) in den Innenraum (2) eingeschoben und der Generator (6) wird eingeschaltet. Dadurch wird der Zufuhrkanal im wesentlichen über seinen gesamten Querschnitt rasch und gleichmäßig induktiv aufgeheizt. Nach Erreichen der Solltemperatur wird der Inneninduktor (4) aus dem Zufuhrkanal herausgezogen. Dieser steht dann vorgeheizt für den Gießbetrieb bereit. Der Inneninduktor (4) läßt sich für viele Aufheizvorgänge an vielen Zufuhrkanälen verwenden. Seine Einsatzmöglichkeit ist dadurch vom Verschleiß des Zufuhrkanals unabhängig. Das Isolationsformteil (7) läßt sich, wenn es verschlissen ist, von dem Inneninduktor (4) abziehen und durch ein neues Isolationsformteil ersetzen. Bei unterschiedlichen Querschnitten von Zufuhrkanälen können Isolationsformteile (7) mit entsprechend unterschiedlichen Abmessungen bereitgehalten werden. Es ist dadurch möglich, den Inneninduktor (4) auch bei unterschiedlichen Innenraumgeometrien jeweils zentriert einzuschieben.If the supply duct is to be heated, then the internal inductor (4) with the molded insulation part (7) is inserted into the interior (2) and the generator (6) is switched on. As a result, the feed channel is inductively heated rapidly and uniformly over its entire cross section. After reaching the target temperature, the internal inductor (4) is pulled out of the supply duct. This is then pre-heated and ready for the casting operation. The inner inductor (4) can be used for many heating processes on many supply channels. Its use is therefore independent of the wear of the feed channel. The insulation molded part (7), if it is worn, can be pulled off the inner inductor (4) and replaced by a new insulation molded part. In the case of different cross sections of supply channels, molded insulation parts (7) with correspondingly different dimensions can be kept ready. This makes it possible to insert the inner inductor (4) in a centered manner even with different interior geometries.
Claims (16)
dadurch gekennzeichnet,
daß in den Innenraum (2) ein Inneninduktor (4) eingebracht wird, daß mittels des Inneninduktors (4) das Formteil (1) aufgeheizt wird und danach der Inneninduktor (4) aus dem Innenraum (2) herausgenommen wird.Method for inductively heating a refractory molded part which has a channel-shaped interior with a substantially rectangular cross section
characterized,
that an inner inductor (4) is introduced into the interior (2), that the molded part (1) is heated by means of the inner inductor (4) and then the inner inductor (4) is removed from the interior (2).
dadurch gekennzeichnet,
daß das Formteil (1) ein feuerfester Zufuhrkanal für flüssiges Metall, insbesondere Stahl, in oder auf einen Metallschmelzensumpf ist.Method according to claim 1,
characterized,
that the molded part (1) is a refractory feed channel for liquid metal, in particular steel, in or on a metal melt sump.
dadurch gekennzeichnet,
daß das Formteil (1) zumindest in einem Teilbereich einen metallischen Außenmantel (3) aufweist.Method according to claim 2,
characterized,
that the molded part (1) has a metallic outer jacket (3) at least in a partial area.
dadurch gekennzeichnet,
daß der Inneninduktor (4) aus einer oder mehreren gekühlten Induktionsspulen (5) gebildet ist.Device for carrying out the method according to one of claims 1 to 3,
characterized,
that the inner inductor (4) is formed from one or more cooled induction coils (5).
dadurch gekennzeichnet,
daß die Abmessungen des Inneninduktors (4) den Abmessungen des Innenraums (2) des feuerfesten Formteils (1) angepaßt sind.Device according to claim 4,
characterized,
that the dimensions of the inner inductor (4) are adapted to the dimensions of the interior (2) of the refractory molded part (1).
dadurch gekennzeichnet,
daß zwischen dem Inneninduktor (4) und dem Innenraum (2) eine elektrisch und/oder thermisch isolierende Schicht (12) vorgesehen ist.Device according to claim 4 or 5,
characterized,
that an electrically and / or thermally insulating layer (12) is provided between the inner inductor (4) and the interior (2).
dadurch gekennzeichnet,
daß der Abstand des Inneninduktors (4) von den Oberflächen der aufzuheizenden Bereiche des feuerfesten Formteils (1) so eingestellt ist, daß unterschiedliche Energiemengen übertragbar sind.Device according to one of claims 4 to 6,
characterized,
that the distance between the internal inductor (4) and the surfaces of the areas of the refractory molded part (1) to be heated is set so that different amounts of energy can be transferred.
dadurch gekennzeichnet,
daß der Inneninduktor (4) im Innenraum (2) des Formteils (1) zentriert ist.Device according to one of claims 4 to 7,
characterized,
that the inner inductor (4) in the interior (2) of the molded part (1) is centered.
dadurch gekennzeichnet,
daß die Zentrierung / Abstände durch ein Isolationsformteil (7) aus einem elektrisch und/oder thermisch isolierenden Material vorgegeben ist / sind.Device according to one of claims 7 or 8,
characterized,
that the centering / distances is / are predetermined by an insulation molded part (7) made of an electrically and / or thermally insulating material.
dadurch gekennzeichnet,
daß das Isolationsformteil (7) aus hochhitzebeständigem, keramischem Fasermaterial oder keramischem Schaummaterial ist.Device according to one of claims 7 to 9,
characterized,
that the insulation molding (7) is made of highly heat-resistant, ceramic fiber material or ceramic foam material.
dadurch gekennzeichnet,
daß das Isolationsformteil (7) auf den Inneninduktor (4) aufschiebbar ist.Device according to one of claims 8 to 10,
characterized,
that the molded insulation part (7) can be pushed onto the inner inductor (4).
dadurch gekennzeichnet,
daß das Isolationsformteil (7) am Inneninduktor (4) auswechselbar ist.Device according to one of claims 8 to 11,
characterized,
that the molded insulation part (7) on the inner inductor (4) is replaceable.
dadurch gekennzeichnet,
daß das Isolationsformteil (7) und das feuerfeste Formteil (1) bzw. der Inneninduktor (4) nach dem Aufheizen einfach voneinander lösbar sind.Device according to one of claims 4 to 12,
characterized,
that the insulation molded part (7) and the refractory molded part (1) or the internal inductor (4) are easily detachable from each other after heating.
dadurch gekennzeichnet,
daß das Isolationsformteil (7) im Innenraum (2) des Formteils (1) zumindest als dessen teilweise Auskleidung angeordnet ist.Device according to one of claims 8 to 12,
characterized,
that the insulation molding (7) in the interior (2) of the molding (1) is arranged at least as its partial lining.
dadurch gekennzeichnet,
daß das Isolationsformteil nach dem Aufheizen zerfällt.Device according to claim 14,
characterized,
that the insulation molding disintegrates after heating.
dadurch gekennzeichnet,
daß das Formteil (1) eine Außenisolierung (11), vorzugsweise aus keramischem Fasermaterial oder keramischem Schaummaterial, aufweist.Device according to one of claims 3 to 15,
characterized,
that the molded part (1) has an outer insulation (11), preferably made of ceramic fiber material or ceramic foam material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19526967A DE19526967A1 (en) | 1995-07-25 | 1995-07-25 | Method and device for inductively heating a refractory molded part |
| DE19526967 | 1995-07-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0755740A1 true EP0755740A1 (en) | 1997-01-29 |
| EP0755740B1 EP0755740B1 (en) | 2002-02-27 |
Family
ID=7767627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96110899A Expired - Lifetime EP0755740B1 (en) | 1995-07-25 | 1996-07-05 | Method and apparatus for induction heating of a refractory article |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0755740B1 (en) |
| JP (1) | JPH09122902A (en) |
| KR (1) | KR970005458A (en) |
| CN (1) | CN1146938A (en) |
| AT (1) | ATE213678T1 (en) |
| AU (1) | AU725323B2 (en) |
| DE (2) | DE19526967A1 (en) |
| ZA (1) | ZA966009B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1211002A1 (en) * | 2000-12-01 | 2002-06-05 | KM Europa Metal Aktiengesellschaft | Process for controlling the temperature of a tundish and tundish for carrying out this method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104962699A (en) * | 2015-07-20 | 2015-10-07 | 柳州市建西机械铸造厂 | Workpiece heat treatment device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1607264A (en) * | 1922-02-02 | 1926-11-16 | Budd Wheel Co | Method of and means for heating disks or plates electrically |
| US2227866A (en) * | 1938-06-29 | 1941-01-07 | Howard E Somes | Protected and insulated heat treatment coil |
| US2806117A (en) * | 1953-12-07 | 1957-09-10 | Westinghouse Electric Corp | Inductor apparatus |
| EP0487924A2 (en) * | 1990-11-29 | 1992-06-03 | Didier-Werke Ag | Process for manufacturing ceramic mouldings and/or profile members |
-
1995
- 1995-07-25 DE DE19526967A patent/DE19526967A1/en not_active Withdrawn
-
1996
- 1996-07-05 DE DE59608780T patent/DE59608780D1/en not_active Expired - Fee Related
- 1996-07-05 AT AT96110899T patent/ATE213678T1/en not_active IP Right Cessation
- 1996-07-05 EP EP96110899A patent/EP0755740B1/en not_active Expired - Lifetime
- 1996-07-09 JP JP8211825A patent/JPH09122902A/en active Pending
- 1996-07-15 ZA ZA966009A patent/ZA966009B/en unknown
- 1996-07-15 KR KR1019960028514A patent/KR970005458A/en not_active Application Discontinuation
- 1996-07-22 CN CN96109932A patent/CN1146938A/en active Pending
- 1996-07-23 AU AU60650/96A patent/AU725323B2/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1607264A (en) * | 1922-02-02 | 1926-11-16 | Budd Wheel Co | Method of and means for heating disks or plates electrically |
| US2227866A (en) * | 1938-06-29 | 1941-01-07 | Howard E Somes | Protected and insulated heat treatment coil |
| US2806117A (en) * | 1953-12-07 | 1957-09-10 | Westinghouse Electric Corp | Inductor apparatus |
| EP0487924A2 (en) * | 1990-11-29 | 1992-06-03 | Didier-Werke Ag | Process for manufacturing ceramic mouldings and/or profile members |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1211002A1 (en) * | 2000-12-01 | 2002-06-05 | KM Europa Metal Aktiengesellschaft | Process for controlling the temperature of a tundish and tundish for carrying out this method |
| KR100738857B1 (en) * | 2000-12-01 | 2007-07-16 | 카엠 오이로파 메탈 악티엔 게젤샤프트 | Method for purposefully moderating of pouring spout and pouring spout for performing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1146938A (en) | 1997-04-09 |
| ATE213678T1 (en) | 2002-03-15 |
| AU6065096A (en) | 1997-01-30 |
| DE19526967A1 (en) | 1997-02-13 |
| KR970005458A (en) | 1997-02-19 |
| DE59608780D1 (en) | 2002-04-04 |
| ZA966009B (en) | 1997-01-31 |
| AU725323B2 (en) | 2000-10-12 |
| JPH09122902A (en) | 1997-05-13 |
| EP0755740B1 (en) | 2002-02-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE19526970C2 (en) | Process for induction heating of a refractory molded part | |
| EP0755740B1 (en) | Method and apparatus for induction heating of a refractory article | |
| DE3427268C2 (en) | Device for determining the presence of metallic melt in a flow channel of a metallurgical furnace or a ladle | |
| EP0212248B1 (en) | Vertical or curved continuous-casting machine for steel | |
| DE10044364C1 (en) | Molten metal atomizer for powder metallurgy, surrounds crucibles by insulation and external induction coil, and includes hot channel for atomization air | |
| WO1998005452A1 (en) | Method, device and fireproof nozzle for the injection and/or casting of liquid metals. | |
| EP0771239B1 (en) | Process for the inductive heating of a fireproof moulding and a suitable moulding therefor | |
| EP0093386A2 (en) | Process and device for casting electrode grids for electric accumulators | |
| DE19651531C2 (en) | Process for regulating the temperature and for uniformizing the temperature profile of a molten, metallic strand | |
| EP0959997A2 (en) | Method, device and closure member for casting on liquid casts | |
| DE19540641C2 (en) | Method for operating an induction device when non-metallic melts flow out | |
| DE10333589B4 (en) | Method for producing a band-shaped composite material for slide bearing production and apparatus for carrying out the method | |
| DE10333590B4 (en) | Casting chamber for a process for producing a band-shaped composite material | |
| DE3041741C2 (en) | Induction channel furnace | |
| DE10333591B4 (en) | Flowers for applying a liquid, in particular a molten metal to a substrate | |
| DE3105129A1 (en) | EQUIPMENT OF TAPE HOLE OF A MELTING FURNACE FOR NON-METAL MATERIALS | |
| DE19651533C2 (en) | Process for the prevention of deposits in metallurgical vessels | |
| DE102007041263A1 (en) | Apparatus and method for casting strips of a molten metal, in particular a molten steel | |
| DE102022210325A1 (en) | Method for preparing and producing a metallic product by continuous casting | |
| EP4192640A1 (en) | Casting nozzle or casting distributor, assembly and method for heating and/or preheating a casting nozzle | |
| DE3048236A1 (en) | Smelting oven with inductive heating, for low conductivity materials - e.g. silicon, has insulating crucible and central conductive rod | |
| DE19855689A1 (en) | Alternating current ladle furnace, especially three phase current ladle furnace | |
| AT526563A1 (en) | Extrusion head for the additive manufacturing of a molded body | |
| DE19603607A1 (en) | Multi-region inductor unit | |
| DE1231856B (en) | Casting ladle with stopper and electrically heated spout |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE DE ES FR GB NL |
|
| 17P | Request for examination filed |
Effective date: 19970308 |
|
| 17Q | First examination report despatched |
Effective date: 19991124 |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE DE ES FR GB NL |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20020227 Ref country code: GB Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20020227 Ref country code: FR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20020227 |
|
| REF | Corresponds to: |
Ref document number: 213678 Country of ref document: AT Date of ref document: 20020315 Kind code of ref document: T |
|
| REF | Corresponds to: |
Ref document number: 59608780 Country of ref document: DE Date of ref document: 20020404 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020705 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020731 |
|
| NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
| GBV | Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed] |
Effective date: 20020227 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20020829 |
|
| EN | Fr: translation not filed | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| BERE | Be: lapsed |
Owner name: *DIDIER-WERKE A.G. Effective date: 20020731 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030201 |
|
| 26N | No opposition filed |
Effective date: 20021128 |