EP0379042B1 - Arrangement to stir a liquid core for a strand at the mold-exit in a continuous casting installation - Google Patents
Arrangement to stir a liquid core for a strand at the mold-exit in a continuous casting installation Download PDFInfo
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- EP0379042B1 EP0379042B1 EP90100398A EP90100398A EP0379042B1 EP 0379042 B1 EP0379042 B1 EP 0379042B1 EP 90100398 A EP90100398 A EP 90100398A EP 90100398 A EP90100398 A EP 90100398A EP 0379042 B1 EP0379042 B1 EP 0379042B1
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- Prior art keywords
- mould
- mold
- billet
- agitating
- cooling system
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- 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
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
Definitions
- the invention relates to a stirring device in a continuous casting installation for stirring a liquid strand sump according to the preamble of claim 1.
- the stirring devices are often built into the mold.
- the electromagnetic field must penetrate the mold wall, which usually consists of copper.
- the magnetic field also has to penetrate a cooling water gap, boundary walls for the cooling water gap and for the stirrer housing, which causes high electrical outputs and correspondingly high operating costs.
- a continuous casting mold which is designed as a composite body and consists of an upper and lower mold part.
- the upper mold part has copper walls and the lower mold part has mold cavity walls made of antimagnetic material and is equipped with stirring coils.
- This mold which is composed of two different metals in the mold cavity, can cause problems at the interface due to different expansion coefficients. At the interface, gap joints and bends can occur, which lead to difficulties starting up, string errors and breakthroughs.
- the invention has for its object to provide a stirring device for stirring the liquid sump of a cast strand in the mold exit area, which eliminates the aforementioned disadvantages.
- a high stirring effect should be achieved with a relatively low energy requirement and at the same time a quick and easy mold change with or without a stirrer change should be realized.
- investment costs for mold stirrers are to be reduced and only a few new parts are required when installing stirrers in existing systems.
- the stirring device according to the invention and the arrangement according to the invention on the mold table allow stirrers to be operated with low electrical outputs which achieve a high stirring effect.
- the stirring device which oscillates with the mold table and which immediately follows the mold outlet brings sufficient stirring power or a rotational movement into the liquid sump inside the mold, so that there is no need for a stirrer in the mold itself. Chill mold changes can be carried out more quickly and easily without dismantling the stirrer, and old, stirrer-free molds can still be used when stirring devices are installed in existing systems. Only a few new parts are required for the stirrer assembly itself.
- a particularly advantageous variant is to provide the mold table with support, centering and clamping devices for the stirring device.
- the mold can be used independently of the support, centering and clamping devices for the stirrer Chill table with its own such facilities.
- the existing, stirrer-free molds can be centered and tightened via an intermediate piece on the mold table.
- the outer dimensions of the intermediate piece are generally larger than the outer dimensions of a support flange of the stirring device.
- An optimal geometric shape of the stirrer with regard to wear, cooling and efficiency can be achieved if an air gap is provided between the stirrer and the cast strand and spray compartments of spray nozzles penetrate into this air gap.
- the air gap can diverge in the direction of the run.
- a high stirring effect in the strand at a relatively low electrical power can additionally be achieved if, according to one embodiment, the housing wall is made of stainless steel between the coils of the stirring device and the strand.
- an exchangeable protective shield made of stainless steel between the stirrer and the strand surface.
- This protective shield can overlap the mold tube or abut a mold tube on the end face and can be arranged to be exchangeable at the bottom.
- Water cooling can also be provided between the stirring device and the protective shield.
- stirrer is designed with coils for a mains frequency, preferably for 50 or 60 Hz.
- the stirrer coils can be arranged in such a way that the stirring device generates a rotating field transverse to the strand withdrawal direction and applies a rotational movement to the liquid core of the strand, which runs essentially concentrically to the strand longitudinal axis.
- the stirring device is mounted separately from the mold on the mold table, the stirrer is directly at the exit during casting arranged the mold tube.
- the gap between the stirrer and the mold cannot be measured or can hardly be measured in many cases. It is preferably a few tenths of a mm to 5 mm and in exceptional cases can be up to 20 mm. Larger gaps, however, reduce the stirring effect within the mold and favor the entry of liquid steel between the mold and stirrer in the event of a strand break.
- stirrer with a cooling system that is independent of the mold cooling.
- the stirrer cooling system can advantageously be connected to the spray water cooling. Additional spray water cooling can be set up between the stirring device and the protective shield.
- FIG. 1 an upper part of a vertical or sheet continuous casting system, preferably for billet, bloom or blank formats, etc., is shown.
- a steel jet 3 feeds liquid steel to a mold 2, and a partially solidified strand 4 is drawn out at the lower end of the mold.
- the mold 2 is supported via an intermediate piece 5 on a guide part 6 of the mold table 8.
- a stirring device is designated, which immediately follows the mold cavity 11 of the oscillating mold.
- the stirring device 10 is separated from the mold 2 and is held in position independently of this in the guide part 6 of the mold table 8 by means of centering devices 12.
- the agitator is direction 10 carried by the mold table 8 or clamped directly to it.
- the mold 2 has its own centering devices 15 and clamping devices 16. In this example, it is attached to the oscillating table 8 via an intermediate piece 5. However, it could also be centered and clamped directly on the oscillation table via a correspondingly large mold flange.
- the outer dimensions 19 of the intermediate piece 5 are larger than the dimension 20 of the outer boundary of an aerofoil 7 of the stirring device 10.
- An air gap 22 is provided between the stirrer 10 and the cast strand 4, which diverges strongly in the direction of the strand. Spray compartments 24 of spray nozzles 25 penetrate into this gap, which increases downwards.
- An envelope 27 between the coils in the stirring device 10 and the strand 4 is made of stainless steel.
- the stirrer 10 has stirring coils which are designed for a three-phase mains frequency, for example 50 or 60 Hz etc.
- the stirring coils generally generate a rotating field transverse to the strand withdrawal direction 28, which sets the liquid core 29 of the strand 4 in rotation.
- an exchangeable protective shield 30 or 30 ' is provided in these examples.
- the protective shield 30 overlaps at its upper ends a copper pipe part 32 of the mold 2.
- an open cooling device 31, 31' is provided by means of spray water.
- the protective shield 30 'abuts the end face of a copper pipe part 32' of the mold 2.
- the protective shields 30, 30 ' are fastened so that they can be replaced from below even in the installed state.
- stirrer 10 and the mold 2 are installed independently of one another on the mold table, between the lower boundary surface 34 of the mold 2 and an upper boundary surface 35 of the stirring device 10 the smallest possible gap between a fraction of a mm and 5 mm is provided.
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Abstract
Description
Die Erfindung betrifft eine Rühreinrichtung in einer Stranggiessanlage zum Rühren eines flüssigen Strangsumpfes gemäss Oberbegriff von Anspruch 1.The invention relates to a stirring device in a continuous casting installation for stirring a liquid strand sump according to the preamble of claim 1.
Es ist bekannt, den flüssigen Strangsumpf beim Stranggiessen in der Kokille selbst oder entlang einer Sekundärkühlzone mittels elektromagnetischen Kräften zu rühren.It is known to stir the liquid strand sump during the continuous casting in the mold itself or along a secondary cooling zone by means of electromagnetic forces.
Bei Knüppel- und Vorblockformaten werden die Rühreinrichtungen vielfach in die Kokille eingebaut. Das elektromagnetische Feld muss dabei die Kokillenwand, die in der Regel aus Kupfer besteht, durchdringen. Im weiteren muss das magnetische Feld auch noch einen Kühlwasserspalt, Begrenzungswände für den Kühlwasserspalt und für das Rührergehäuse durchdringen, was hohe elektrische Leistungen und entsprechend hohe Betriebskosten verursacht.In the case of billet and billet formats, the stirring devices are often built into the mold. The electromagnetic field must penetrate the mold wall, which usually consists of copper. Furthermore, the magnetic field also has to penetrate a cooling water gap, boundary walls for the cooling water gap and for the stirrer housing, which causes high electrical outputs and correspondingly high operating costs.
Aus DE-PS 29 11 187 ist eine Stranggiesskokille bekannt, die als Verbundkörper ausgebildet ist und aus einem oberen und unteren Kokillenteil besteht. Der obere Kokillenteil hat Kupferwände und der untere Kokillenteil hat Formhohlraumwände aus antimagnetischem Werkstoff und ist mit Rührspulen versehen. Bei dieser im Formhohlraum aus zwei unterschiedlichen Metallen zusammengesetzten Kokille können Probleme an der Nahtstelle wegen unterschiedlichen Ausdehnungskoeffizienten entstehen. An der Nahtstelle können Spaltfugen und Verbiegungen auftreten, die Anfahrschwierigkeiten, Strangfehler und Durchbrüche erzeugen.From DE-PS 29 11 187 a continuous casting mold is known, which is designed as a composite body and consists of an upper and lower mold part. The upper mold part has copper walls and the lower mold part has mold cavity walls made of antimagnetic material and is equipped with stirring coils. This mold, which is composed of two different metals in the mold cavity, can cause problems at the interface due to different expansion coefficients. At the interface, gap joints and bends can occur, which lead to difficulties starting up, string errors and breakthroughs.
Aus DE-PS 27 31 238, die den Oberbegriff von Anspruch 1 bildet, ist weiter eine Kokille bekannt, die mit einer anschliessend an den Formhohlraum der Kokille versehenen Rühreinrichtung ausgerüstet ist. Je nach den Erfordernissen kann die Länge der Rühreinrichtung, die mit dem Kokillenboden verschraubt ist, in ihrer Länge verändert werden. Die Vielzahl der Rührer in der Kokille und unterhalb der Kokille erfordert eine hohe elektrische Leistung. Bei jedem Kokillenwechsel werden die Rührer zwangsläufig mit der Kokille ausgebaut. Bei Einbauten von Rührern in vorhandene Anlagen sind neue Kokillen und in der Regel auch neue Kokillentische erforderlich.From DE-PS 27 31 238, which forms the preamble of claim 1, a mold is also known, which with a subsequent to the mold cavity the mold-equipped stirrer is equipped. Depending on the requirements, the length of the stirring device which is screwed to the mold bottom can be changed in length. The large number of stirrers in the mold and below the mold requires high electrical power. With each mold change, the stirrers are inevitably removed with the mold. When installing stirrers in existing systems, new molds and generally also new mold tables are required.
Der Erfindung liegt die Aufgabe zugrunde, eine Rühreinrichtung zum Rühren des flüssigen Sumpfes eines gegossenen Stranges im Bereich des Kokillenausganges zu schaffen, die die vorgenannten Nachteile ausschaltet. Insbesondere soll eine hohe Rührwirkung bei relativ niedrigem Energiebedarf erreicht und gleichzeitig ein rascher und einfacher Kokillenwechsel mit oder ohne Rührerwechsel verwirklicht werden können. Im weiteren sollen Investitionskosten für Kokillenrührer gesenkt und bei Einbauten von Rührern in vorhandene Anlagen nur wenig Neubauteile benötigt werden.The invention has for its object to provide a stirring device for stirring the liquid sump of a cast strand in the mold exit area, which eliminates the aforementioned disadvantages. In particular, a high stirring effect should be achieved with a relatively low energy requirement and at the same time a quick and easy mold change with or without a stirrer change should be realized. In addition, investment costs for mold stirrers are to be reduced and only a few new parts are required when installing stirrers in existing systems.
Diese Aufgabe wird durch die Summe der Merkmale von Anspruch 1 gelöst.This object is achieved by the sum of the features of claim 1.
Die erfindungsgemässe Rühreinrichtung und die erfindungsgemässe Anordnung am Kokillentisch erlauben, Rührer mit niedrigen elektrischen Leistungen zu betreiben, die eine hohe Rührwirkung erzielen. Die mit dem Kokillentisch oszillierende Rühreinrichtung, die unmittelbar dem Kokillenausgang folgt, bringt eine ausreichende Rührkraft bzw. eine Rotationsbewegung in den flüssigen Sumpf innerhalb der Kokille, so dass auf Rührer in der Kokille selbst verzichtet werden kann. Kokillenwechsel können ohne Demontage des Rührers rascher und einfacher vorgenommen werden, und bei Einbauten von Rühreinrichtungen in vorhandene Anlagen können alte, rührerlose Kokillen weiter verwendet werden. Auch für die Rührermontage selbst sind nur wenige Neubauteile erforderlich.The stirring device according to the invention and the arrangement according to the invention on the mold table allow stirrers to be operated with low electrical outputs which achieve a high stirring effect. The stirring device which oscillates with the mold table and which immediately follows the mold outlet brings sufficient stirring power or a rotational movement into the liquid sump inside the mold, so that there is no need for a stirrer in the mold itself. Chill mold changes can be carried out more quickly and easily without dismantling the stirrer, and old, stirrer-free molds can still be used when stirring devices are installed in existing systems. Only a few new parts are required for the stirrer assembly itself.
Es sind verschiedene Möglichkeiten denkbar, die Rühreinrichtungen am Kokillentisch anzubringen. Eine besonders vorteilhafte Variante besteht darin, den Kokillentisch mit Auflage-, Zentrier- und Spanneinrichtungen für die Rühreinrichtung zu versehen. Die Kokille kann unabhängig von den Auflage-, Zentrier- und Spanneinrichtungen für den Rührer gegenüber dem Kokillentisch mit eigenen solchen Einrichtungen versehen sein.Various options are conceivable for attaching the stirring devices to the mold table. A particularly advantageous variant is to provide the mold table with support, centering and clamping devices for the stirring device. The mold can be used independently of the support, centering and clamping devices for the stirrer Chill table with its own such facilities.
Beim Einbau von Rührern in vorhandene Anlagen ist es von besonderem Vorteil, wenn die vorhandenen, rührerlosen Kokillen über ein Zwischenstück am Kokillentisch zentrier- und festspannbar sind. Die Aussenabmessungen des Zwischenstückes sind dabei in der Regel grösser, als die Aussenabmessungen eines Tragflansches der Rühreinrichtung.When installing stirrers in existing systems, it is particularly advantageous if the existing, stirrer-free molds can be centered and tightened via an intermediate piece on the mold table. The outer dimensions of the intermediate piece are generally larger than the outer dimensions of a support flange of the stirring device.
Eine optimale geometrische Formgebung des Rührers in bezug auf Verschleiss, Kühlung und Wirkungsgrad kann erreicht werden, wenn zwischen dem Rührer und dem gegossenen Strang ein Luftspalt vorgesehen ist und Sprühfächer von Sprühdüsen in diesen Luftspalt eindringen. Gemäss einer vorteilhaften Ausführungsform kann der Luftspalt in Stranglaufrichtung divergieren.An optimal geometric shape of the stirrer with regard to wear, cooling and efficiency can be achieved if an air gap is provided between the stirrer and the cast strand and spray compartments of spray nozzles penetrate into this air gap. According to an advantageous embodiment, the air gap can diverge in the direction of the run.
Eine hohe Rührwirkung im Strang bei relativ niedriger elektrischer Leistung kann zusätzlich erreicht werden, wenn, gemäss einem Ausführungsbeispiel, zwischen den Spulen der Rühreinrichtung und dem Strang die Gehäusewand aus rostfreiem Stahl ausgeführt ist.A high stirring effect in the strand at a relatively low electrical power can additionally be achieved if, according to one embodiment, the housing wall is made of stainless steel between the coils of the stirring device and the strand.
Zum Schutz der Rühreinrichtung gegen Wärmestrahlung, ausfliessenden Stahl bei Durchbrüchen etc. wird im Sinne eines Ausführungsbeispieles vorgeschlagen, zwischen Rührer und Strangoberfläche ein auswechselbares Schutzschild aus rostfreiem Stahl anzuordnen. Dieses Schutzschild kann das Kokillenrohr überlappen oder stirnseitig an ein Kokillenrohr anstossen und nach unten auswechselbar angeordnet sein. Zwischen der Rühreinrichtung und dem Schutzschild kann im weiteren eine Wasserkühlung vorgesehen sein.To protect the stirring device against heat radiation, leaking steel in the event of breakthroughs, it is proposed in the sense of an exemplary embodiment to arrange an exchangeable protective shield made of stainless steel between the stirrer and the strand surface. This protective shield can overlap the mold tube or abut a mold tube on the end face and can be arranged to be exchangeable at the bottom. Water cooling can also be provided between the stirring device and the protective shield.
Eine weitere wesentliche Reduktion von Investitionskosten ist erzielbar, wenn der Rührer mit Spulen für eine Netzfrequenz, vorzugsweise für 50 oder 60 Hz, ausgelegt ist. Die Rührerspulen können dabei so angeordnet sein, dass die Rühreinrichtung ein Drehfeld quer zur Strangabzugsrichtung erzeugt und dem flüssigen Kern des Stranges eine Rotationsbewegung aufbringt, die im wesentlichen konzentrisch zur Stranglängsachse verläuft.A further substantial reduction in investment costs can be achieved if the stirrer is designed with coils for a mains frequency, preferably for 50 or 60 Hz. The stirrer coils can be arranged in such a way that the stirring device generates a rotating field transverse to the strand withdrawal direction and applies a rotational movement to the liquid core of the strand, which runs essentially concentrically to the strand longitudinal axis.
Obwohl die Rühreinrichtung getrennt von der Kokille am Kokillentisch montiert wird, ist der Rührer während des Giessens unmittelbar am Ausgang des Kokillenrohres angeordnet. Gemäss einem Ausführungsbeispiel ist der Spalt zwischen Rührer und Kokille in vielen Fällen nicht oder kaum messbar. Er beträgt vorzugsweise wenige zehntel-mm bis 5 mm und kann in Ausnahmefällen bis 20 mm betragen. Grössere Spalte reduzieren aber die Rührwirkung innerhalb der Kokille und begünstigen den Eintritt von flüssigem Stahl zwischen Kokille und Rührer im Falle eines Strangdurchbruches.Although the stirring device is mounted separately from the mold on the mold table, the stirrer is directly at the exit during casting arranged the mold tube. According to one embodiment, the gap between the stirrer and the mold cannot be measured or can hardly be measured in many cases. It is preferably a few tenths of a mm to 5 mm and in exceptional cases can be up to 20 mm. Larger gaps, however, reduce the stirring effect within the mold and favor the entry of liquid steel between the mold and stirrer in the event of a strand break.
Gemäss einem Ausführungsbeispiel wird vorgeschlagen, den Rührer mit einem von der Kokillenkühlung unabhängigen Kühlsystem zu versehen. Das Rührerkühlsystem kann mit Vorteil mit der Sprühwasserkühlung verbunden werden. Eine zusätzliche Sprühwasserkühlung kann zwischen der Rühreinrichtung und dem Schutzschild eingerichtet werden.According to one embodiment, it is proposed to provide the stirrer with a cooling system that is independent of the mold cooling. The stirrer cooling system can advantageously be connected to the spray water cooling. Additional spray water cooling can be set up between the stirring device and the protective shield.
Im nachfolgenden soll die Erfindung anhand von Figuren zusätzlich erläutert werden.In the following, the invention will be further explained with the aid of figures.
Es zeigen:
- Fig. 1 eine Seitenansicht, teilweise im Schnitt, einer Stranggiesskokille und einer Rühreinrichtung auf einem oszillierenden Kokillentisch,
- Fig. 2 einen vergrösserten Vertikalschnitt durch einen Kokillen- und Rührerteil eines weiteren Beispieles und
- Fig. 3 einen vergrösserten Vertikalschnitt durch einen Kokillen- und Rührerteil eines weiteren Beispieles.
- 1 is a side view, partly in section, of a continuous casting mold and a stirring device on an oscillating mold table,
- Fig. 2 is an enlarged vertical section through a mold and stirrer part of another example and
- Fig. 3 is an enlarged vertical section through a mold and stirrer part of another example.
In Fig. 1 ist ein oberer Teil einer Vertikal- oder Bogenstranggiessanlage, vorzugsweise für Knüppel-, Vorblock- oder Platinenformate etc.,dargestellt. Ein Stahlstrahl 3 führt einer Kokille 2 flüssigen Stahl zu, und am unteren Ende der Kokille wird ein teilweise erstarrter Strang 4 ausgezogen. Die Kokille 2 ist über ein Zwischenstück 5 auf einem Führungsteil 6 des Kokillentisches 8 abgestützt.In Fig. 1, an upper part of a vertical or sheet continuous casting system, preferably for billet, bloom or blank formats, etc., is shown. A
Mit 10 ist eine Rühreinrichtung bezeichnet, die dem Formhohlraum 11 der oszillierenden Kokille unmittelbar folgt. Die Rühreinrichtung 10 ist von der Kokille 2 getrennt und wird unabhängig von dieser im Führungsteil 6 des Kokillentisches 8 mittels Zentriereinrichtungen 12 in Position gehalten. Mittels Auflage- und Spanneinrichtungen 13 bzw. 14 wird die Rührein richtung 10 vom Kokillentisch 8 getragen bzw. an diesem direkt festgeklemmt.With 10 a stirring device is designated, which immediately follows the
Die Kokille 2 besitzt eigene Zentriereinrichtungen 15 und Spanneinrichtungen 16. Sie ist in diesem Beispiel über ein Zwischenstück 5 am Oszillationstisch 8 befestigt. Sie könnte aber auch über einen entsprechend grossen Kokillenflansch direkt am Oszillationstisch zentriert und festgeklemmt werden. Die Aussenabmessungen 19 des Zwischenstückes 5 sind grösser als die Abmessung 20 der äusseren Begrenzung einer Tragfläche 7 der Rühreinrichtung 10.The
Zwischen dem Rührer 10 und dem gegossenen Strang 4 ist ein Luftspalt 22 vorgesehen, der in Stranglaufrichtung stark divergiert. In diesem sich nach unten vergrössernden Spalt dringen von unten Sprühfächer 24 von Sprühdüsen 25 ein. Eine Umhüllung 27 zwischen den Spulen in der Rühreinrichtung 10 und dem Strang 4 ist aus rostfreiem Stahl gefertigt.An
Der Rührer 10 besitzt Rührspulen, die für eine Drehstromnetzfrequenz, beispielsweise 50 oder 60 Hz etc., ausgelegt sind. Die Rührspulen erzeugen in der Regel ein Drehfeld quer zur Strangabzugsrichtung 28, das den flüssigen Kern 29 des Stranges 4 in Rotation versetzt.The
In Fig. 2 und 3 werden für gleiche Teile gleiche Bezugsziffern wie für Fig. 1 verwendet. Zwischen dem Gehäuse des Rührers 10 und dem gegossenen Strang 4 ist in diesen Beispielen ein auswechselbares Schutzschild 30 bzw. 30′ vorgesehen. Das Schutzschild 30 überlappt an seinen oberen Enden einen Kupferrohrteil 32 der Kokille 2. Zwischen dem Schutzschild 30, 30′ und dem Gehäuse des Rührers 10 ist eine offene Kühleinrichtung 31, 31′ mittels Sprühwasser vorgesehen.2 and 3, the same reference numerals are used as for Fig. 1 for the same parts. Between the housing of the
In Fig. 3 stösst das Schutzschild 30′ stirnseitig an einen Kupferrohrteil 32′ der Kokille 2. Die Schutzschilder 30, 30′ sind so befestigt, dass sie auch in eingebautem Zustand von unten auswechselbar sind.In Fig. 3, the protective shield 30 'abuts the end face of a copper pipe part 32' of the
Obwohl der Rührer 10 und die Kokille 2 voneinander unabhängig am Kokillentisch eingebaut werden, ist zwischen der unteren Begrenzungsfläche 34 der Kokille 2 und einer oberen Begrenzungsfläche 35 der Rühreinrichtung 10 ein möglichst kleiner Spalt zwischen eime Bruchteil eines mm und 5 mm vorgesehen.Although the
Claims (17)
- A device in a continuous casting plant for agitating a liquid phase of a billet in the chill mould outlet region, an agitating device (10) being provided adjacent the cavity (11) of an oscillating chill mould (2), characterised in that the agitating device (10), which oscillates together with the mould (2) and is directly adjacent the cooled mould cavity (11), can be attached to the mould table (8) separately from the mould (2).
- A device according to claim 1, characterised in that the agitating device (10) has means (12) for centring it relative to the mould table (8).
- A device according to claim 1 or 2, characterised in that the agitating device (10) has means (7, 14) for resting it on and/or clamping it to the mould table (8).
- A device according to any of claims 1 to 3, characterised in that the mould (2) has means (15, 16) for centring and clamping it to the mould table (8).
- A device according to any of claims 1 to 4, characterised in that the mould (2) can be centred and clamped to the mould table (8) via an intermediate member (5).
- A device according to claim 5, characterised in that the outer dimensions (19) of the intermediate member (5) are greater than the outer dimensions (10) of a bearing flange on the agitating device (10).
- A device according to any of claims 1 to 6, characterised in that an air gap (22) is provided between the agitator (10) and the cast billet (4) and blowers (24) of spray nozzles (25) penetrate into the gap ( 22 ).
- A device according to claim 7, characterised in that the air gap (22) diverges in the direction of motion (28) of the billet.
- A device according to any of claims 1 to 8, characterised in that a stainless steel jacket (27) is provided between the billet (4) and the coils of the agitating device (10).
- A device according to any of claims 1 to 9, characterised in that the agitator (10) has coils designed for a mains frequency of preferably 50 - 60 Hz.
- A device according to any of claims 1 to 10, characterised in that the agitating device (10) generates a rotating field transversely to the direction (28) of withdrawal of the billet and drives the liquid core (29) of the billet (4) in motion substantially concentrically relative to the billet axis.
- A device according to any of claims 1 to 11, characterised in that the agitator (10) has a cooling system (31, 31′) independently of the mould cooling system.
- A device according to claim 12, characterised in that the agitator cooling system is connected to the spray-water cooling system (31).
- A device according to any of claims 1 to 13, characterised in that a gap of 0 - 5 mm is provided between the bottom boundary surface (34) of the mould (2) and an upper boundary surface (35) of the agitating device (10).
- A device according to any of claims 1 to 14, characterised in that the protective shield (30) overlaps a mould tube (32) and is replaceable from beneath.
- A device according to claim 15, characterised in that the edge of the protective shield (30′) abuts a mould tube (32′) and is secured so as to be replaceable from beneath.
- A device according to claim 15 or 16, characterised in that a water cooling system (31. 31′) is provided between the agitating device (10) and the protective shield (30, 30′).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT90100398T ATE82170T1 (en) | 1989-01-19 | 1990-01-10 | STIRRING DEVICE IN CONTINUOUS CASTING PLANT FOR STIRRING A LIQUID STRAND SUMP IN THE MOLD OUTLET AREA. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH164/89 | 1989-01-19 | ||
| CH164/89A CH678026A5 (en) | 1989-01-19 | 1989-01-19 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0379042A2 EP0379042A2 (en) | 1990-07-25 |
| EP0379042A3 EP0379042A3 (en) | 1990-12-19 |
| EP0379042B1 true EP0379042B1 (en) | 1992-11-11 |
Family
ID=4180719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90100398A Expired - Lifetime EP0379042B1 (en) | 1989-01-19 | 1990-01-10 | Arrangement to stir a liquid core for a strand at the mold-exit in a continuous casting installation |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5025853A (en) |
| EP (1) | EP0379042B1 (en) |
| JP (1) | JP2955315B2 (en) |
| AT (1) | ATE82170T1 (en) |
| CH (1) | CH678026A5 (en) |
| DE (1) | DE59000436D1 (en) |
| ES (1) | ES2036844T3 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4103963A1 (en) * | 1991-02-09 | 1992-08-13 | Kabelmetal Ag | METHOD FOR THE CONTINUOUS CONTINUOUS CASTING OF COPPER ALLOYS |
| AT404104B (en) * | 1994-07-01 | 1998-08-25 | Voest Alpine Ind Anlagen | CONTINUOUS CHOCOLATE WITH A STIRRIER INCLUDING A MAGNETIC CIRCLE |
| KR100376504B1 (en) * | 1998-08-04 | 2004-12-14 | 주식회사 포스코 | Continuous casting method and continuous casting apparatus used |
| US20090110892A1 (en) * | 2004-06-30 | 2009-04-30 | General Electric Company | System and method for making a graded barrier coating |
| US20110048669A1 (en) * | 2009-08-31 | 2011-03-03 | Abb Inc. | Electromagnetic stirrer arrangement with continuous casting of steel billets and bloom |
| WO2019113165A1 (en) * | 2017-12-06 | 2019-06-13 | The Suppes Family Trust | Molded self-assembled electromagnet motors and devices |
| KR102121979B1 (en) * | 2018-10-24 | 2020-06-12 | 주식회사 퓨쳐캐스트 | A die casting device comprising a movable electromagnetic control coil module |
| WO2020085775A1 (en) * | 2018-10-24 | 2020-04-30 | 주식회사 퓨쳐캐스트 | Die casting apparatus provided with movable electromagnetically controlled structure control module |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3167829A (en) * | 1962-02-20 | 1965-02-02 | Concast Ag | Apparatus for continuous casting of metal |
| US3804147A (en) * | 1971-03-30 | 1974-04-16 | Etudes De Centrifugation | Continuous rotary method of casting metal utilizing a magnetic field |
| US3967362A (en) * | 1975-07-14 | 1976-07-06 | United States Steel Corporation | Continuous caster alignment method |
| FR2358222A1 (en) * | 1976-07-13 | 1978-02-10 | Siderurgie Fse Inst Rech | NEW PROCESS AND DEVICE FOR THE ELECTROMAGNETIC BREWING OF CONTINUOUS FLOWING METAL PRODUCTS |
| GR65264B (en) * | 1978-02-18 | 1980-07-31 | British Aluminium Co Ltd | Metal casting |
| AT359225B (en) * | 1978-03-23 | 1980-10-27 | Voest Alpine Ag | TURNING FRAME CONTINUOUS CHOCOLATE |
| JPS5794458A (en) * | 1980-12-03 | 1982-06-11 | Mitsubishi Heavy Ind Ltd | Electromagnetic stirrer in continuous casting machine |
| US4473105A (en) * | 1981-06-10 | 1984-09-25 | Olin Corporation | Process for cooling and solidifying continuous or semi-continuously cast material |
| JPS58215254A (en) * | 1982-06-08 | 1983-12-14 | Kawasaki Steel Corp | Electromagnetic stirrer disposed right under casting mold of continuous casting machine or in posterior position |
| JPS59101261A (en) * | 1982-12-02 | 1984-06-11 | Kawasaki Steel Corp | Continuous casting method with which flow of molten steel is braked by static magnetic field |
| JPS60136845U (en) * | 1984-02-16 | 1985-09-11 | 株式会社神戸製鋼所 | Mold for electromagnetic stirring of continuous casting machine |
| JPS61186157A (en) * | 1985-02-14 | 1986-08-19 | Mitsubishi Heavy Ind Ltd | Supporting method of electromagnetic stirrer |
-
1989
- 1989-01-19 CH CH164/89A patent/CH678026A5/de not_active IP Right Cessation
-
1990
- 1990-01-05 JP JP2000138A patent/JP2955315B2/en not_active Expired - Lifetime
- 1990-01-10 US US07/462,807 patent/US5025853A/en not_active Expired - Fee Related
- 1990-01-10 DE DE9090100398T patent/DE59000436D1/en not_active Expired - Lifetime
- 1990-01-10 AT AT90100398T patent/ATE82170T1/en not_active IP Right Cessation
- 1990-01-10 ES ES199090100398T patent/ES2036844T3/en not_active Expired - Lifetime
- 1990-01-10 EP EP90100398A patent/EP0379042B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CH678026A5 (en) | 1991-07-31 |
| JP2955315B2 (en) | 1999-10-04 |
| EP0379042A3 (en) | 1990-12-19 |
| ES2036844T3 (en) | 1993-06-01 |
| US5025853A (en) | 1991-06-25 |
| ATE82170T1 (en) | 1992-11-15 |
| JPH02229652A (en) | 1990-09-12 |
| EP0379042A2 (en) | 1990-07-25 |
| DE59000436D1 (en) | 1992-12-17 |
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