EP0181567A1 - Equipment for casting metal strip, especially steel strip - Google Patents

Equipment for casting metal strip, especially steel strip Download PDF

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Publication number
EP0181567A1
EP0181567A1 EP85113826A EP85113826A EP0181567A1 EP 0181567 A1 EP0181567 A1 EP 0181567A1 EP 85113826 A EP85113826 A EP 85113826A EP 85113826 A EP85113826 A EP 85113826A EP 0181567 A1 EP0181567 A1 EP 0181567A1
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EP
European Patent Office
Prior art keywords
casting
storage vessel
film
molten metal
metal
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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.)
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EP85113826A
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German (de)
French (fr)
Inventor
Fritz-Peter Dr.-Ing. Pleschiutschnigg
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Vodafone GmbH
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Mannesmann AG
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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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars

Definitions

  • the invention relates to a device for continuous casting of molten metal, in particular steel, in which pressurized molten metal can be conveyed from a storage vessel into a crystallizer according to the principle of communicating tubes.
  • Devices of this type are operated according to a method in which the molten metal from a storage container and a spout is introduced into a stationary (non-oscillating) continuous casting mold in a controlled manner, in which the casting strand is also pulled out in a controlled manner and in which at least one heat-resistant film is continuously produced during casting is carried along on a cross-sectional side at the rate at which the cast strand is pulled out.
  • the classic process line of continuous slab casting (thickness approx. 200 to 300 mm) / hot strip (-Ready, -Intermediate, -Finished) has a reduction degree of greater than 30.
  • the objective of reducing the degree of reduction from greater than 30 to greater than 3 leads to an elimination of the rough and intermediate road and parts of the finishing train and thus to a new technology which leads to a substantial reduction in the process line and thus to a reduction in the conversion costs between cast strip and finished wamband contributes.
  • the invention is based on the problem of difficulties encountered in strip casting, e.g. to avoid with regard to the regulation of the inflow into the very narrow die.
  • the object is achieved according to the invention in that the metal melt, which is under increased pressure in an at least partially closed storage vessel, can be introduced through a gap outlet which is provided in the upper region of the storage vessel, that at least on the underside of the closed casting cross section
  • the film can be inserted into the path of the respective strand side at a casting speed and that the film and cast strip lie on a cooled guide for the film or cast strip.
  • This design allows an exact metering of the amount of metal, possibly with the exclusion of air, so that the specified pull-out speed can be maintained.
  • the additional pressure improves the density of the cast.
  • the pressure acts as a regulator for the cast tape's contact with the cooled guide.
  • the film saves a special oscillation device. The film also causes undisturbed passage of heat into the cooled guide.
  • An advantageous embodiment of the invention consists in that the gap outlet is formed from an overflow arranged at the level of the guide and a cooling roller which can be driven in the direction of movement of the cast strip.
  • the object is further achieved according to the invention in that the metal melt, which is under increased pressure in a storage vessel closed at the top, is introduced vertically through a gap outlet into a continuous plate casting mold, with at least two opposite broad sides between a slot inlet and the cooled plates Continuous casting mold, a film can be inserted into the path of the respective strand side at the casting speed.
  • this design allows casting in the arc of a thin strand, which is subjected to the least possible deformation during the later winding process.
  • Another improvement of the invention is that the film is guided between the overflow and the cooled guide.
  • a pressure chamber is arranged adjacent to the storage vessel for the molten metal, which is connected to the storage vessel by an opening in the bottom region of a partition.
  • the overflow is assigned at least one cooling roller set or adjustable to cast strip thickness as a crystallizer.
  • the cooling roller replaces a film on the top of the cast strip and also allows the cast strip thickness to be adjusted.
  • a side limitation for the cast belt can advantageously be achieved in that the cooling rollers are each provided with flanges at their ends at a distance from the cast belt width.
  • the invention also avoids reoxidation of the molten metal during crucial phases of the casting process, in that inert gas is applied to the pressure chamber assigned to the storage vessel.
  • the 1 has a storage vessel 1, from which the molten metal 2 (liquid steel) is conveyed into the crystallizer 3.
  • the molten metal 2 is conveyed from a pressure chamber 4 by a controllable excess pressure dp / dt.
  • the storage vessel 1 is closed insofar as it is connected in a communicating manner to the pressure chamber 4 according to FIG. 1 due to the metal melt 2 and has only one gap outlet 5 which is formed by an upper nozzle plate 5a and a lower nozzle plate 5b.
  • the resulting bottom 3a of the crystallizer 3 is used for feeding a film 6.
  • the film 6 bears against a cooled guide 10, which extracts the heat flow dQ / dt from the molten metal 2.
  • the film 6 can be made from a wide variety of materials. Aluminum or steel strips can be considered as the film 6 made of metal. However, the film 6 can also be a ceramic film, for example 0.1 mm thick, with high thermal conductivity. Furthermore, glass fiber film, carbon fleece, whisker film made of C single crystals can be considered for the film 6. It goes without saying that mixed forms of the materials mentioned above can also be used for this film 6. The materials mentioned are resistant to temperature changes and have a relatively high thermal conductivity. It must also be assumed that the film 6 is also used together with a metal band supporting it, the metal band not coming into direct contact with the molten metal 2 or the externally solidified cast band 9. In this case, the film 6 prevents sticking between the cooled metal band and the hot cast band 9.
  • the film 6 serves to save the crystallizer 3 from oscillating.
  • the problem, the molten metal 2 with a Introducing a temperature of approx. 1500 ° C. (molten steel) into the narrow crystallizer 3 is solved here through the gap outlet 5 in connection with the pressure in the pressure chamber 4 which is higher than the atmospheric pressure.
  • the gap outlet 5 is formed from an overflow 11, which is arranged at the level 12, the cooled guide 10 being assigned a cooling roller 13 as a component of the crystallizer 3.
  • the drivable cooling roller 13 is mounted in the arrow directions 14 for the purpose of setting different cast strip thicknesses.
  • the gap outlet 5 is consequently formed here by the cooled guide 10 or the film 6 together with the cooling roller 13.
  • the overflow 11 acts like a pre-metering of the molten metal flow.
  • Full cooling begins in the gap outlet 5 because the roller 13 is cooled like the guide 10.
  • the gap outlet 5 is moved in the vertical direction of movement (dm / dt).
  • a continuous plate casting mold 15 is preferred which dissipates the heat flow dQ / dt through the respective copper plate.
  • the film 6 is in each case on two opposite broad sides of the continuous plate casting mold 15, each with a slot inlet 16 forming the guide for the films 6 moving in a closed circuit.
  • the heat flow dQ / dt dissipated via the foils 6 is essentially released to the cooling units 17.
  • the film 6 moves over driven and idling guide rollers 18 and 19 at casting speed Yg.
  • the film 6 is guided between the upper run 11 and the cooled guide 10.
  • the molten metal 2 is fed from the pressure chamber 4 to the storage vessel 1 through an opening 20 in the base region 21, which is created by a partition wall 22.
  • the invention can be implemented in further variations:
  • the embodiment according to FIG. 2 allows the cooling roller 13 to be followed by a further cooling roller 13 in the casting belt movement direction 9a, an endless film 6 being wrapped around the cooling rollers 13.
  • One of the cooling rollers 3 is then driven at the casting speed Vg.
  • the casting speed Vg is to be equated with the casting belt speed.
  • the lateral limitation for the cast strip 9 can be formed by flanges 23 (FIG. 3), which are adjustable to the cast strip width, in addition to side walls 8a, 8b (FIG. 3).
  • additional foils 6 with analog guidance as described in FIGS. 1, 2 and 4 can also be used. Such an example can be seen in FIG. 5.
  • the side foils are designated 6a and 6b there.
  • the pressure chamber 4 assigned to the storage vessel 1 is charged with inert gas in order to avoid reoxidation of the molten metal 2.
  • FIG. 4 A further embodiment is shown in FIG. 4.
  • the storage vessel 1 has been further developed up to the gap outlet 5, whereby (left half of the illustration) the metal melt 2 is brought abruptly onto the casting cross section 7 via a tear-off edge 24 and is also cooled there abruptly.
  • An alternative to this is the right half of the illustration in FIG. 4, the storage vessel 1 guiding the molten metal 2 onto the casting cross section 7 through a vertically delimited wall part 25.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Abstract

In such equipment for casting metal strip, especially molten steel, the molten metal (2) under pressure can be conveyed according to the principle of communicating tubes from a storage vessel (1) into a straight mould (3). In order to avoid difficulties which occur during the casting of strips, e.g. those which relate to the control of the inflow of molten metal (2) into the very narrow slot mould, it is proposed that the molten metal (2) under high pressure in an at least partially closed storage vessel (1) should be introducible through a slot outlet (5) which is provided in the upper region of the storage vessel (1), that a foil (6) should be introducible at the casting rate into the path of the respective side of the strand, at least at the underside (3a) of the closed casting cross-section (7), and that the foil (6) and the cast strip (9) should rest on a cooled guide (10) for the foil (6) and the cast strip (9). <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum Bandstranggießen von Metall-, insbesondere von Stahlschmelze, bei dem unter Druck stehende Metallschmelze nach dem Prinzip kommunizierender Röhren, von einem Vorratsgefäß in einen Kristallisator förderbar ist.The invention relates to a device for continuous casting of molten metal, in particular steel, in which pressurized molten metal can be conveyed from a storage vessel into a crystallizer according to the principle of communicating tubes.

Derartige Vorrichtungen werden nach einem Verfahren betrieben, bei dem die Metallschmelze aus einem Vorratsbehälter und einem Ausguß in eine ortsfeste (nicht oszillierende) Stranggießkokille geregelt eingeleitet wird, bei dem ferner der Gußstrang geregelt ausgezogen wird und bei dem während des Gießens kontinuierlich jeweils eine wärmebeständige Folie zumindest an einer Querschnittsseite mit Ausziehgeschwindigkeit des Gußstranges mitgeführt wird.Devices of this type are operated according to a method in which the molten metal from a storage container and a spout is introduced into a stationary (non-oscillating) continuous casting mold in a controlled manner, in which the casting strand is also pulled out in a controlled manner and in which at least one heat-resistant film is continuously produced during casting is carried along on a cross-sectional side at the rate at which the cast strand is pulled out.

Die Entwicklung einer neuen Technologie zur Produktion von gegossenen Bändern basiert auf der physikalisch-technischen Möglichkeit, geforderte Werkstoffeigenschaften an gewalztem Warmband mit einem minimalen Reduktionsgrad von größer 3 aus gegossenem Vormaterial erzeugen zu können.The development of a new technology for the production of cast strips is based on the physical and technical possibility of being able to produce the required material properties on rolled hot strips with a minimum degree of reduction of greater than 3 from cast primary material.

Die klassische Verfahrenslinie Brammenstrangguß (Dicke ca. 200 bis 300 mm) / Warmband (-Vorstraße, -Zwischenstraße, -Fertigstraße) weist dagegen einen Reduktionsgrad von größer 30 auf. Alle anderen Produktionslinien, wie Profil-, Nahtlosrohr und Grobblech, weisen heute bereits einen Reduktionsgrad von 3 bis 10 auf. Die Zielsetzung, den Reduktionsgrad von größer 30 auf größer 3 zu verringern, führt zu einer Eliminierung der Vor- und Zwischenstraße und Teilen der Fertigstraße und damit zu einer neuen Technologie, die zur wesentlichen Kürzung der Verfahrenslinie und damit zur Verringerung der Umwandlungskosten zwischen gegossenem Band und fertigem Wamband beiträgt.In contrast, the classic process line of continuous slab casting (thickness approx. 200 to 300 mm) / hot strip (-Ready, -Intermediate, -Finished) has a reduction degree of greater than 30. All other production lines, such as profile, seamless tube and heavy plate, already have a reduction rate of 3 to 10. The objective of reducing the degree of reduction from greater than 30 to greater than 3 leads to an elimination of the rough and intermediate road and parts of the finishing train and thus to a new technology which leads to a substantial reduction in the process line and thus to a reduction in the conversion costs between cast strip and finished wamband contributes.

Der Stand der Technik gliedert sich in folgende Verfahren, denen grundsätzlich selbständige Bedeutung zukommt:

  • Das Stranggießen von Metallen wird im Senkrechtverfahren und im Horizontalverfahren bei oszillierender Kokille bzw. bei einer Relativbewegung zwischen Gußstrang und horizontal-Stranggießkokille ausgeübt. Sodann werden wandernde Kokillen angewendet, worunter Paare von Bändern, Walzen, Ketten u. dgl. verstanden werden.
The state of the art is divided into the following methods, which are basically independent:
  • The continuous casting of metals is carried out in the vertical process and in the horizontal process with an oscillating mold or with a relative movement between the cast strand and the horizontal continuous casting mold. Then moving molds are used, including pairs of belts, rollers, chains and the like. Like. To be understood.

Der Erfindung liegt demgegenüber die Aufgabe zugrunde, beim Bandstranggießen auftretende Schwierigkeiten, z.B. hinsichtlich der Regelung des Zuflusses in die sehr schmale Spaltkokille zu vermeiden.In contrast, the invention is based on the problem of difficulties encountered in strip casting, e.g. to avoid with regard to the regulation of the inflow into the very narrow die.

Die gestellte Aufgabe wird nach einem ersten Vorschlag erfindungsgemäß dadurch gelöst, daß die unter erhöhtem Druck in einem zumindest teilweise geschlossenen Vorratsgefäß befindliche Metallschmelze durch einen Spaltauslaß, der im oberen Bereich des Vorratsgefäßes vorgesehen ist, einführbar ist, daß zumindest an der Unterseite des geschlossenen Gießquerschnitts eine Folie in den Weg der jeweiligen Strangseite mit Gießgeschwindigkeit einführbar ist und daß Folie und Gußband auf einer gekühlten Führung für die Folie bzw. das Gußband aufliegen. Diese Gestaltung gestattet ein genaues Dosieren der Metallmenge, ggf. unter Luftabschluß, so daß die vorgegebene Ausziehgeschwindigkeit eingehalten werden kann. Der zusätzliche Druck verbessert die Dichte des Gusses. Außerdem wirkt der Druck als Regulativ für das Anliegen des Gußbandes an der gekühlten Führung. Andererseits erspart die Folie eine besondere Oszillationsvorrichtung. Die Folie bewirkt außerdem einen ungestörten Wärmedurchtritt in die gekühlte Führung.According to a first proposal, the object is achieved according to the invention in that the metal melt, which is under increased pressure in an at least partially closed storage vessel, can be introduced through a gap outlet which is provided in the upper region of the storage vessel, that at least on the underside of the closed casting cross section The film can be inserted into the path of the respective strand side at a casting speed and that the film and cast strip lie on a cooled guide for the film or cast strip. This design allows an exact metering of the amount of metal, possibly with the exclusion of air, so that the specified pull-out speed can be maintained. The additional pressure improves the density of the cast. In addition, the pressure acts as a regulator for the cast tape's contact with the cooled guide. On the other hand, the film saves a special oscillation device. The film also causes undisturbed passage of heat into the cooled guide.

Eine vorteilhafte Ausgestaltungsform der Erfindung besteht darin, daß der Spaltauslaß aus einem auf dem Niveau der Führung angeordneten Überlauf und einer in Gußbandbewegungsrichtung antreibbaren Kühlrolle gebildet ist.An advantageous embodiment of the invention consists in that the gap outlet is formed from an overflow arranged at the level of the guide and a cooling roller which can be driven in the direction of movement of the cast strip.

Die gestellte Aufgabe wird ferner nach einem zweiten Vorschlag erfindungsgemäß dadurch gelöst, daß die unter erhöhtem Druck in einem oben geschlossenen Vorratsgefäß befindliche Metallschmelze durch einen Spaltauslaß lotrecht in eine Platten-Stranggießkokille eingeleitet wird, wobei zumindest auf zwei gegenüberliegenden Breitseiten zwischen einem Schlitzeinlaß und der gekühlten Platten-Stranggießkokille eine Folie in den Weg der jeweiligen Strangseite mit Gießgeschwindigkeit einführbar ist. Neben dem genauen Dosieren, der verbesserten Gußdichte und der vorteilhaften Wärmeabfuhr gestattet diese Gestaltung das Gießen im Bogen eines dünnen Stranges, der einer geringstmöglichen Deformation beim späteren Wickelvorgang unterworfen wird.The object is further achieved according to the invention in that the metal melt, which is under increased pressure in a storage vessel closed at the top, is introduced vertically through a gap outlet into a continuous plate casting mold, with at least two opposite broad sides between a slot inlet and the cooled plates Continuous casting mold, a film can be inserted into the path of the respective strand side at the casting speed. In addition to the precise dosing, the improved casting density and the advantageous heat dissipation, this design allows casting in the arc of a thin strand, which is subjected to the least possible deformation during the later winding process.

Eine weitere Verbesserung der Erfindung besteht darin, daß die Folie zwischen Überlauf und gekühlter Führung geführt ist. Die Vorteile sind Vermeidung der Oszillation, eine größtmögliche Gießgeschwindigkeit sowie der ungestörte Wärmeübergang in die Kokillenplatte.Another improvement of the invention is that the film is guided between the overflow and the cooled guide. The advantages are the avoidance of oscillation, the highest possible casting speed and the undisturbed heat transfer into the mold plate.

Nach der weiteren Erfindung wird vorgeschlagen, daß benachbart zum Vorratsgefäß für die Metallschmelze ein Druckraum angeordnet ist, der durch eine Öffnung im Bodenbereich einer Trennwand mit dem Vorratsgefäß verbunden ist.According to the further invention, it is proposed that a pressure chamber is arranged adjacent to the storage vessel for the molten metal, which is connected to the storage vessel by an opening in the bottom region of a partition.

Eine andere Verbesserung der Erfindung besteht darin, daß dem Überlauf zumindest eine auf Gußbanddicke eingestellte bzw. einstellbare Kühlrolle als Kristallisator zugeordnet ist. Die Kühlrolle ersetzt eine Folie an der Oberseite des Gußbandes und erlaubt außerdem eine Einstellung der Gußbanddicke.Another improvement of the invention is that the overflow is assigned at least one cooling roller set or adjustable to cast strip thickness as a crystallizer. The cooling roller replaces a film on the top of the cast strip and also allows the cast strip thickness to be adjusted.

Andererseits ist vorteilhaft, die Schrumpfung des Gußbandes dadurch zu kompensieren, indem der Kühlrolle zumindest eine weitere Kühlrolle in Gußbandbewegungsrichtung nachgeordnet ist, daß um die Kühlrollen eine Folie geschlungen ist und daß zumindest eine der Kühlrollen mit Gußbandgeschwindigkeit drehantreibbar ist. Der Vorteil einer solchen Gestaltung besteht in der Anstellbarkeit der Kühlrollen, die in Hintereinanderanordnung nicht auf derselben Höhe angeordnet sein müssen.On the other hand, it is advantageous to compensate for the shrinkage of the cast strip in that at least one further cooling roll is arranged downstream of the cast roll in the direction of movement of the cast strip, that a film is wrapped around the cooling rolls and that at least one of the cooling rollers can be driven in rotation at the casting belt speed. The advantage of such a design is the adjustability of the cooling rollers, which need not be arranged at the same height in a row.

Eine Seitenbegrenzung für das Gußband läßt sich vorteilhafterweise dadurch erzielen, daß die Kühlrollen an ihren Enden im Abstand der Gußbandbreite jeweils mit Bordscheiben versehen sind.A side limitation for the cast belt can advantageously be achieved in that the cooling rollers are each provided with flanges at their ends at a distance from the cast belt width.

Die Erfindung vermeidet außerdem eine Reoxidation der Metallschmelze während entscheidender Phasen des Gießprozesses, indem der dem Vorratsgefäß zugeordnete Druckraum mit inertem Gas beaufschlagt ist.The invention also avoids reoxidation of the molten metal during crucial phases of the casting process, in that inert gas is applied to the pressure chamber assigned to the storage vessel.

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im folgenden näher beschrieben.Embodiments of the invention are shown in the drawing and are described in more detail below.

Es zeigen

  • Fig. 1 eine perspektivische Seitenansicht einer ersten Ausführungsform der Vorrichtung,
  • Fig. 2 eine alternative Ausführungsform der Vorrichtung, ebenfalls. perspektivisch in einer Teilseitenansicht,
  • Fig. 3 die Vorrichtung gemäß Fig. 2 in Vorderansicht,
  • Fig. 4 einen senkrechten Querschnitt durch eine weitere alternative Ausführungsform der Vorrichtung und
  • Fig. 5 einen horizontalen Querschnitt in der Ebene Y - V gemäß Fig. 4.
Show it
  • 1 is a perspective side view of a first embodiment of the device,
  • Fig. 2 shows an alternative embodiment of the device, also. perspective in a partial side view,
  • 3 shows the device according to FIG. 2 in front view,
  • Fig. 4 is a vertical cross section through a further alternative embodiment of the device and
  • 5 shows a horizontal cross section in the plane Y-V according to FIG. 4.

Die Vorrichtung zum Bandstranggießen gemäß Fig. 1 weist ein Vorratsgefäß 1 auf, von dem die Metallschmelze 2 (flüssiger Stahl) in den Kristallisator 3 gefördert wird. Die Metallschmelze 2 wird durch einen regelbaren Überdruck dp/dt aus einem Druckraum 4 gefördert. Das Vorratsgefäß 1 ist insoweit geschlossen, als es gemäß Fig. 1 mit dem Druckraum 4 kommunizierend aufgrund der Metallschmelze 2 verbunden ist und nur einen Spaltauslaß 5 aufweist, der durch eine obere Düsenplatte 5a und eine untere Düsenplatte 5b gebildet wird. Die sich daraus ergebende Unterseite 3a des Kristallisators 3 wird für die Zuführung einer Folie 6 benutzt. Im übrigen ist der Gießquerschnitt 7, z.B. durch Seitenwände 8a und 8b an den Schmalseiten des Gußbandes 9 in der Art gemäß Fig. 3 begrenzt. Die Folie 6 liegt hierbei gegen eine gekühlte Führung 10 an, die der Metallschmelze 2 den Wärmestrom dQ/dt entzieht.1 has a storage vessel 1, from which the molten metal 2 (liquid steel) is conveyed into the crystallizer 3. The molten metal 2 is conveyed from a pressure chamber 4 by a controllable excess pressure dp / dt. The storage vessel 1 is closed insofar as it is connected in a communicating manner to the pressure chamber 4 according to FIG. 1 due to the metal melt 2 and has only one gap outlet 5 which is formed by an upper nozzle plate 5a and a lower nozzle plate 5b. The resulting bottom 3a of the crystallizer 3 is used for feeding a film 6. Otherwise, the casting cross section 7, e.g. limited by side walls 8a and 8b on the narrow sides of the cast strip 9 in the manner shown in FIG. 3. The film 6 bears against a cooled guide 10, which extracts the heat flow dQ / dt from the molten metal 2.

Die Folie 6 kann aus den unterschiedlichsten Werkstoffen hergestellt sein. Als Folie 6 aus Metall kommen Aluminium- oder Stahlbänder in Betracht. Die Folie 6 kann jedoch auch eine Keramikfolie von z.B. 0,1 mm Dicke mit hoher Temperaturleitfähigkeit sein. Ferner kann für die Folie 6 Glasfaserfolie, Kohlenstoff-Vlies, Whisker-Folie aus C-Einkristallen in Betracht kommen. Es versteht sich, daß für diese Folie 6 auch Mischformen aus den vorstehend genannten Werkstoffen angewendet werden können. Die genannten Werkstoffe sind temperaturwechselbeständig und weisen eine relativ hohe Wärmeleitfähigkeit auf. Es ist außerdem zu unterstellen, daß die Folie 6 auch zusammen mit einem sie stützenden Metallband verwendet wird, wobei das Metallband mit der flüssigen Metallschmelze 2 oder dem äußerlich erstarrten Gußband 9 nicht in unmittelbare Berührung kommt. Die Folie 6 verhindert in diesem Fall ein Kleben zwischen dem gekühlten Metallband und dem heißen Gußband 9. Im Prinzip dient die Folie 6 dazu, ein Oszillieren des Kristallisators 3 zu ersparen. Das Problem, die Metallschmelze 2 mit einer Temperatur von ca. 1500°C (Stahlschmelze) in den engen Kristallisator 3 einzubringen, wird hier durch den Spaltauslaß 5 In Verbindung mit dem gegenüber dem Atmosphären-Druck erhöhten Druck im Druckraum 4 gelöst. Gemäß einer zweiten Ausführungsform (Fig. 2 und 3) ist der Spaltauslaß 5 aus einem Überlauf 11 gebildet, der auf dem Niveau 12 angeordnet ist, wobei der gekühlten Führung 10 eine Kühlrolle 13 als Bestandteil des Kristallisators 3 zugeordnet ist. Die drehantreibbare Kühlrolle 13 ist in den Pfeil richtungen 14 zwecks Einstellung unterschiedlicher Gußbanddicken verstellbar gelagert. Der Spaltauslaß 5 wird hier demzufolge durch die gekühlte Führung 10 bzw. die Folie 6 zusammen mit der Kühlrolle 13 gebildet. Der Überlauf 11 wirkt wie eine Vordosierung der Metallschmelzenströmung. Die volle Kühlung setzt im Spaltauslaß 5 ein, weil die Rolle 13 wie die Führung 10 gekühlt ist.The film 6 can be made from a wide variety of materials. Aluminum or steel strips can be considered as the film 6 made of metal. However, the film 6 can also be a ceramic film, for example 0.1 mm thick, with high thermal conductivity. Furthermore, glass fiber film, carbon fleece, whisker film made of C single crystals can be considered for the film 6. It goes without saying that mixed forms of the materials mentioned above can also be used for this film 6. The materials mentioned are resistant to temperature changes and have a relatively high thermal conductivity. It must also be assumed that the film 6 is also used together with a metal band supporting it, the metal band not coming into direct contact with the molten metal 2 or the externally solidified cast band 9. In this case, the film 6 prevents sticking between the cooled metal band and the hot cast band 9. In principle, the film 6 serves to save the crystallizer 3 from oscillating. The problem, the molten metal 2 with a Introducing a temperature of approx. 1500 ° C. (molten steel) into the narrow crystallizer 3 is solved here through the gap outlet 5 in connection with the pressure in the pressure chamber 4 which is higher than the atmospheric pressure. According to a second embodiment (FIGS. 2 and 3), the gap outlet 5 is formed from an overflow 11, which is arranged at the level 12, the cooled guide 10 being assigned a cooling roller 13 as a component of the crystallizer 3. The drivable cooling roller 13 is mounted in the arrow directions 14 for the purpose of setting different cast strip thicknesses. The gap outlet 5 is consequently formed here by the cooled guide 10 or the film 6 together with the cooling roller 13. The overflow 11 acts like a pre-metering of the molten metal flow. Full cooling begins in the gap outlet 5 because the roller 13 is cooled like the guide 10.

Gemäß weiterer Ausführungsformen (Fig. 4) ist der Spaltauslaß 5 in die lotrechte Bewegungsrichtung (dm/dt) verlegt. Hierbei wird eine Platten-Stranggießkokille 15 bevorzugt, die durch die jeweilige Kupferplatte den Wärmestrom dQ/dt abführt. Die Folie 6 liegt jeweils auf zwei gegenüberliegenden Breitseiten der Platten-Stranggießkokille 15 auf, wobei jeweils ein Schlitzeinlaß 16 die Führung für die in einem geschlossenen Kreislauf bewegten Folien 6 bilden. Der über die Folien 6 abgeführte Wärmestrom dQ/dt wird im wesentlichen an die Kühlaggregate 17 abgegeben. Hierbei bewegt sich die Folie 6 jeweils über angetriebene und leerlaufende Führungsrollen 18 und 19 mit Gießgeschwindigkeit Yg.According to further embodiments (FIG. 4), the gap outlet 5 is moved in the vertical direction of movement (dm / dt). In this case, a continuous plate casting mold 15 is preferred which dissipates the heat flow dQ / dt through the respective copper plate. The film 6 is in each case on two opposite broad sides of the continuous plate casting mold 15, each with a slot inlet 16 forming the guide for the films 6 moving in a closed circuit. The heat flow dQ / dt dissipated via the foils 6 is essentially released to the cooling units 17. Here, the film 6 moves over driven and idling guide rollers 18 and 19 at casting speed Yg.

I. Ausführungsbeispiel gemäß den Fig. 2 und 3 ist die Folie 6 zwischen dem Oberlauf 11 und der gekühlten Führung 10 geführt. In allen Fällen wird die Metallschmelze 2 dem Vorratsgefäß 1 durch eine Öffnung 20 im Bodenbereich 21, die durch eine Trennwand 22 entsteht, aus dem Druckraum 4 zugeführt.I. Embodiment according to FIGS. 2 and 3, the film 6 is guided between the upper run 11 and the cooled guide 10. In all cases, the molten metal 2 is fed from the pressure chamber 4 to the storage vessel 1 through an opening 20 in the base region 21, which is created by a partition wall 22.

Die Erfindung kann in weiteren Variationen verwirklicht werden: Die Ausführungsform gemäß Fig. 2 gestattet, der Kühlrolle 13 eine weitere Kühlrolle 13 in Gußbandbewegungsrichtung 9a nachzuordnen, wobei um die Kühlrollen 13 eine endlose Folie 6 geschlungen ist. Eine der Kühlrollen 3 ist sodann mit Gießgeschwindigkeit Vg angetrieben. Die Gießgeschwindigkeit Vg ist mit der Gußbandgeschwindigkeit gleichzusetzen.The invention can be implemented in further variations: The embodiment according to FIG. 2 allows the cooling roller 13 to be followed by a further cooling roller 13 in the casting belt movement direction 9a, an endless film 6 being wrapped around the cooling rollers 13. One of the cooling rollers 3 is then driven at the casting speed Vg. The casting speed Vg is to be equated with the casting belt speed.

Die seitliche Begrenzung für das Gußband 9 kann außer durch Seitenwände 8a, 8b (Fig. 3) noch durch Bordscheiben 23 (Fig. 3), die auf Gußbandbreite einstellbar sind, gebildet werden. Außerdem können auch zusätzliche Folien 6 mit analoger Führung wie zu den Fig. 1, 2 und 4 beschrieben, eingesetzt werden. Ein solches Beispiel ist aus Fig. 5 zu ersehen. Die seitlichen Folien sind dort mit 6a und 6b bezeichnet.The lateral limitation for the cast strip 9 can be formed by flanges 23 (FIG. 3), which are adjustable to the cast strip width, in addition to side walls 8a, 8b (FIG. 3). In addition, additional foils 6 with analog guidance as described in FIGS. 1, 2 and 4 can also be used. Such an example can be seen in FIG. 5. The side foils are designated 6a and 6b there.

Der dem Vorratsgefäß 1 zugeordnete Druckraum 4 ist mit inertem Gas beaufschlagt, um eine Reoxidation der Metallschmelze 2 zu vermeiden.The pressure chamber 4 assigned to the storage vessel 1 is charged with inert gas in order to avoid reoxidation of the molten metal 2.

Eine weitere Ausführungsform enthält Fig. 4. Das Vorratsgefäß 1 ist hier bis zum Spaltauslaß 5 weiterentwickelt, wobei (linke Hälfte der Darstellung) die Metallschmelze 2 ohne Temperaturabfall über eine Abrißkante 24 abrupt auf den Gießquerschnitt 7 geführt und dort ebenso abrupt gekühlt wird. Eine Alternative hierzu bildet die rechte Hälfte der Darstellung in Fig. 4, wobei das Vorratsgefäß 1 die Metallschmelze 2 auf den Gießquerschnitt 7 durch einen senkrecht begrenzten Wandteil 25 leitet.A further embodiment is shown in FIG. 4. The storage vessel 1 has been further developed up to the gap outlet 5, whereby (left half of the illustration) the metal melt 2 is brought abruptly onto the casting cross section 7 via a tear-off edge 24 and is also cooled there abruptly. An alternative to this is the right half of the illustration in FIG. 4, the storage vessel 1 guiding the molten metal 2 onto the casting cross section 7 through a vertically delimited wall part 25.

Claims (9)

1. Vorrichtung zum Bandstranggießen von Metall-, insbesondere von Stahlschmelze, bei dem unter Druck stehende Metallschmelze nach dem Prinzip kommunizierender Röhren von einem Vorratsgefäß in einen Kristallisator förderbar ist,
dadurch gekennzeichnet,
daß die unter erhöhtem Druck in einem zumindest teilweise geschlossenen Vorratsgefäß (1) befindliche Metallschmelze (2) durch einen Spaltauslaß (5), der im oberen Bereich des Vorratsgefäßes (1) vorgesehen ist, einführbar ist, daß zumindest an der Unterseite (3a) des geschlossenen Gießquerschnitts (7) eine Folie (6) in den Weg der jeweiligen Strangseite mit Gießgeschwindigkeit einführbar ist und daß Folie (6) und GuBband (9) auf einer gekühlten Führung (10) für die Folie (6) bzw. das Gußband (9) aufliegen.1. Device for the continuous casting of molten metal, in particular steel, in which pressurized molten metal can be conveyed from a storage vessel into a crystallizer according to the principle of communicating tubes,
characterized,
that the metal melt (2) located under increased pressure in an at least partially closed storage vessel (1) can be introduced through a gap outlet (5) which is provided in the upper region of the storage vessel (1), that at least on the underside (3a) of the closed casting cross-section (7), a film (6) can be introduced into the path of the respective strand side at casting speed and that film (6) and guBband (9) on a cooled guide (10) for the film (6) or the casting band (9 ) lie on. 2. Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß der Spaltauslaß (5) aus einem auf dem Niveau (12) der Führung (10) angeordneten Überlauf (11) und einer in Gußbandbewegungsrichtung antreibbaren Kühl rolle (13) gebildet ist.2. Device according to claim 1,
characterized,
that the gap outlet (5) from an on the level (12) of the guide (10) arranged overflow (11) and a cooling roller (13) which can be driven in the direction of the cast strip movement is formed. 3. Vorrichtung zum Bandstranggießen von Metall-, insbesondere von Stahlschmelze, bei dem unter Druck stehende Schmelze nach dem Prinzip kommunizierender Röhren von einem Vorratsgefäß in einen Kristallisator förderbar ist;
dadurch gekennzeichnet,
daß die unter erhöhtem Druck in einem oben geschlossenen Yorratsgefäß (1) befindliche Metallschmelze (2) durch einen Spaltauslaß (5) lotrecht in eine Platten-Stranggießkokille (15) eingeleitet wird, wobei zumindest auf zwei gegenüberliegenden Breitseiten zwischen einem Schlitzeinlaß (16) und der gekühlten Platten-Stranggießkokille (15) eine Folie (6) in den Weg der jeweiligen Strangseite mit Gießgeschwindigkeit einführbar ist.3. Device for the continuous casting of metal, in particular steel melt, in which the pressurized melt can be conveyed from a storage vessel into a crystallizer according to the principle of communicating tubes;
characterized,
that the metal melt (2) located under increased pressure in a closed Yorrats vessel (1) is introduced vertically through a gap outlet (5) into a continuous plate casting mold (15), at least on two opposite broad sides between a slot inlet (16) and the cooled plate continuous casting mold (15) a film (6) can be inserted in the path of the respective strand side at the casting speed. 4. Vorrichtung nach den Ansprüchen 1 und 2, dadurch gekennzeichnet,
daß die Folie (6) zwischen Überlauf (11) und gekühlter Führung (10) geführt ist.4. Device according to claims 1 and 2, characterized in
that the film (6) between the overflow (11) and the cooled guide (10) is guided. 5. Vorrichtung nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet,
daß benachbart zum Vorratsgefäß (1) für die Metallschmelze (2) ein Druckraum (4) angeordnet ist, der durch eine Öffnung (22) im Bodenbereich (21) einer Trennwand (22) mit dem Vorratsgefäß (1) verbunden ist.5. The device according to one or more of claims 1 to 4, characterized in
that a pressure chamber (4) is arranged adjacent to the storage vessel (1) for the molten metal (2) and is connected to the storage vessel (1) by an opening (22) in the bottom region (21) of a partition (22). 6. Vorrichtung nach den Ansprüchen 1, 2 und 4,
dadurch gekennzeichnet,
daß dem Überlauf (11) zumindest eine auf Gußbanddicke eingestellte bzw. einstellbare Kühlrolle (13) als Kristallisator (3) zugeordnet ist.6. Device according to claims 1, 2 and 4,
characterized,
that the overflow (11) is assigned at least one cooling roller (13) set or adjustable to cast strip thickness as a crystallizer (3). 7. Vorrichtung nach Anspruch 6,
dadurch gekennzeichnet,
daß der Kühlrolle (13) zumindest eine weitere Kühlrolle (13) in Gußbandbewegungsrichtung (9a) nachgeordnet ist, daß um die Kühlrollen (13) eine Folie (6) geschlungen ist und daß zumindest eine der Kühlrollen (13) mit Gußbandgeschwindigkeit drehantreibbar ist.7. The device according to claim 6,
characterized,
that the cooling roller (13) is followed by at least one further cooling roller (13) in the casting belt movement direction (9a), that a film (6) is wrapped around the cooling rollers (13) and that at least one of the cooling rollers (13) can be driven in rotation at the casting belt speed. 8. Vorrichtung nach den Ansprüchen 1 bis 7,
dadurch gekennzeichnet,
daß die Kühlrollen (13) an ihren Enden im Abstand der Gußbandbreite jeweils mit Bordscheiben (23) versehen sind.8. Device according to claims 1 to 7,
characterized,
that the cooling rollers (13) are each provided with flanges (23) at their ends at a distance from the casting belt width. 9. Vorrichtung nach den Ansprüchen 1 bis 8,
dadurch gekennzeichnet,
daß der dem Vorratsgefäß (1) zugeordnete Druckraum (4) mit inertem Gas beaufschlagt ist.9. Device according to claims 1 to 8,
characterized,
that the pressure chamber (4) assigned to the storage vessel (1) is acted upon by inert gas.
EP85113826A 1984-11-03 1985-10-30 Equipment for casting metal strip, especially steel strip Withdrawn EP0181567A1 (en)

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DE19843440237 DE3440237C2 (en) 1984-11-03 1984-11-03 Device for continuous strip casting of metals, in particular steel
DE3440237 1984-11-03

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CN115415488A (en) * 2022-07-27 2022-12-02 上海交通大学 Horizontal continuous casting preparation process for ultra-high quality single crystal copper

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DE3810302A1 (en) * 1988-03-24 1989-10-12 Mannesmann Ag CASTING DEVICE FOR THE CONTINUOUS PRODUCTION OF METAL STRIP
DE4344953C2 (en) * 1993-12-27 1996-10-02 Mannesmann Ag Method and device for casting a metal strip close to its final dimensions
DE19815007C2 (en) * 1998-01-23 2000-07-06 Sms Demag Ag Casting process for a metal strand
DE19811434C2 (en) * 1998-03-17 2002-05-16 Mannesmann Ag Method and device for uniformizing a molten metal film
DE19828773C2 (en) * 1998-06-27 2000-09-14 Sms Demag Ag Belt casting machine for metal belt
DE102006057858A1 (en) 2006-12-08 2008-08-21 Vladimir Volchkov Continuous casting method for steels which are highly alloyed and have high carbon content comprises casting melt on to strip of unalloyed, low-carbon steel whose edges are brought together around it and welded together
CN102836975A (en) * 2011-06-24 2012-12-26 北京有色金属研究总院 Zinc alloy horizontal continuous casting system solidified under pressure and vibration
DE102012017684A1 (en) 2012-08-31 2014-03-06 Vladimir Volchkov Continuous casting of non-ferrous metals, comprises casting a melt of non-ferrous metal on movable metallic sheath, which is made of band, subjecting band edges to continuous welding to form melt, and wrapping continuous cast block
DE102012017682A1 (en) 2012-08-31 2014-03-06 Vladimir Volchkov Continuous casting of non-ferrous metals involves pouring melt of non-ferrous metal in continuously formed movable metallic sheath, forming continuous cast block, and continuously welding edge strips in controlled protective atmosphere
CN104722726B (en) * 2013-12-23 2017-03-29 鞍钢股份有限公司 Continuous casting production method of high-silicon electrical steel

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CN115415488A (en) * 2022-07-27 2022-12-02 上海交通大学 Horizontal continuous casting preparation process for ultra-high quality single crystal copper

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JPS61123451A (en) 1986-06-11
CN85106442A (en) 1987-02-25
DE3440237C2 (en) 1986-11-06
DE3440237A1 (en) 1986-05-22

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