EP0015251B1 - Installation for a metallurgical vessel with a protective tube - Google Patents

Installation for a metallurgical vessel with a protective tube Download PDF

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Publication number
EP0015251B1
EP0015251B1 EP19800890019 EP80890019A EP0015251B1 EP 0015251 B1 EP0015251 B1 EP 0015251B1 EP 19800890019 EP19800890019 EP 19800890019 EP 80890019 A EP80890019 A EP 80890019A EP 0015251 B1 EP0015251 B1 EP 0015251B1
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EP
European Patent Office
Prior art keywords
jacket
protective tube
outlet opening
casting
metallurgical vessel
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.)
Expired
Application number
EP19800890019
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German (de)
French (fr)
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EP0015251A1 (en
Inventor
Franz Kagerhuber
Wolfgang Lederer
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Voestalpine AG
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Voestalpine AG
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Publication of EP0015251A1 publication Critical patent/EP0015251A1/en
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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
    • B22D37/00—Controlling or regulating the pouring of molten metal from a casting melt-holding vessel
    • B22D37/005—Shielding the molten metal stream
    • 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
    • B22D11/106—Shielding the molten jet

Definitions

  • the invention relates to a device on a metallurgical vessel with a protective tube for a metal pouring jet flowing from an outlet opening of the vessel, in particular at an intermediate vessel of a continuous casting installation, the protective tube surrounding the pouring jet peripherally and extending from the outlet opening of the metallurgical vessel over at least part of the Has longitudinal extension of the pouring stream extending jacket which has an opening which can be closed by means of a cover.
  • the melt is usually poured from a ladle into an intermediate vessel and flows from the intermediate vessel through an outlet opening into a continuous mold arranged below the intermediate vessel.
  • the pouring jet is passed through a protective tube, which protective tube extends from the outlet opening of the metallurgical vessel, i.e. in continuous casting plants from the pan or from the tundish, extends over at least part of the longitudinal extent of the pouring stream.
  • the protective tube is immersed in the melt of the intermediate vessel or the mold, or it ends, as was the case with billet continuous caster, at a distance above the bath level of the intermediate vessel or the mold.
  • the protective tube is connected to a gas supply line for supplying an inert gas.
  • the outlet opening grows after a certain operating time, so that one is forced to observe the outlet opening from time to time during the casting, for which purpose - the protective tube - with the ones listed above Disadvantages - again laterally removed, that is, had to be moved transversely to the direction of the pouring jet.
  • the invention aims to avoid these disadvantages and difficulties and has as its object to create a device of the type described in the introduction, in which it is possible to remove and install, for example, replace the protective tube at any time during the casting operation, that is to say without interrupting the casting operation to be brought into position by another or, for example, only when the flow has flowed out of the metallurgical vessel without the melt striking the protective tube.
  • the opening of the jacket is designed as a slot which extends over the entire length of the jacket and its width is greater than the diameter of the pouring jet and that the jacket is releasably attached to the metallurgical vessel by means of a quick-release fastener .
  • a preferred embodiment is characterized in that the jacket and the cover can be fastened tightly to a gas supply device known per se provided at the outlet opening and surrounding it peripherally.
  • the quick-release fastener is expediently formed from two mutually opposite hooks which engage in guide rails mounted on the intermediate vessel. This makes it possible to move the protective tube along the guide rails for assembly and disassembly without being impeded by the pouring stone protruding from the intermediate vessel.
  • the steel flows out of the intermediate vessel 1 melt 2, for example aluminum-soaked steel melt, through an outlet opening 3 provided in the bottom of the vessel, which is provided in a pouring stone 4, into the continuous mold 5 arranged below the outlet opening 3.
  • This is a billet casting mold.
  • the size of the cross section of the outlet opening 3 cannot be regulated here.
  • the correct height of the bath level 6 in the mold 5 is regulated by coordinating the height of the molten steel 2 in the tundish 1 and the rate at which the strand is pulled out of the mold 5.
  • a cover slag is not provided on the bathroom mirror 6.
  • a protective tube 8 is provided on the underside of the intermediate vessel and is detachably mounted on the intermediate vessel by means of a quick-release fastener 9.
  • the quick-release fastener 9 is formed from two opposing hooks 11 which engage in guide rails 10 mounted on the intermediate vessel.
  • the guide rails 10 are arranged at a distance below the base plate of the intermediate vessel, so that the protective tube can be moved along the guide rails for assembly and disassembly without being impeded by the pouring stone protruding from the intermediate vessel.
  • the guide rails 10 are welded to a cylindrical ring body 12, which ring body is mounted via a radially outwardly directed flange 13 to a further ring body 14, which is arranged concentrically to the first ring body 12 and is detachably fastened to the intermediate vessel.
  • a gas supply line 15 for supplying inert protective gas is inserted into this second annular body 14.
  • the ring body 12 causes a uniform distribution of the protective gas around the pouring jet 7.
  • the jacket 16 of the protective tube 8 surrounds the pouring jet 7 at a peripheral distance and ends at a distance above the bath level in the mold. Since the mold has only a very small diameter in the illustrated embodiment, the jacket 16 ends above the mold.
  • the protective gas which flows in a meandering diversion around the first ring body 12 into the protective tube 8, passes through the gap 19 formed between the upper side 17 of the mold and the lower edge 18 of the protective tube.
  • the protective tube has an opening 20 in the jacket, which is designed as a continuous slot, ie, extending over the entire length 21 of the protective tube 8.
  • the width 22 of the slot 20 is larger than the diameter 23 of the pouring jet 7.
  • This slot 20 can be closed by a slide 24 arranged on the outside of the jacket 16 and movable in the circumferential direction of the jacket.
  • Two guide pins 25 are used to guide the slide 24.
  • a sealing strip 26 ensures a good closure.
  • the slide can be opened or closed by means of a handle 27.
  • the slide needs to be opened, whereupon an oxygen lance can be inserted through the slot and the necessary maintenance work can be carried out at the outlet opening.
  • the flow is passed into an emergency mold through a drainage channel 29 which can be pivoted in the direction of the arrows 28 in FIG. 1 to below the outlet opening.
  • This gutter is appropriately designed so that it can also be inserted through the slot 20 of the protective tube 8.
  • the end of the gutter can be bent in the direction of the pouring jet axis, so that when the gutter swivels, its end enters the slot 20 of the protective tube 8 without being obstructed by the jacket of the protective tube.
  • the protective tube can also be brought into position only after the start of pouring, that is to say after the flow has been drained off via the drainage channel, the protective tube being moved along the guide rails 13 with the slide 24 open to a stop 30 below the outlet opening and the pouring jet 7 passes through the slot 20 of the jacket. An impact of the pouring jet 7 on any part of the protective tube 8 is avoided. It is also possible to replace the protective tube at any time during the casting operation, without the pouring jet hitting the protective tube.
  • the protective tube can also serve to protect molten steel as it flows out of a ladle into an intermediate vessel. It can also be used in steel slab casting and, more generally, in transferring metal melts where the metal jet is to be protected from contamination.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Description

Die Erfindung betrifft eine Einrichtung an einem metallurgischen Gefäß mit einem Schutzrohr für einen aus einer Austrittsöffnung des Gefäßes strömenden Metallgießstrahl, insbesondere an einem Zwischengefäß einer Stranggießanlage, wobei das Schutzrohr einen den Gießstrahl peripher umgebenden, sich von der Austrittsöffnung des metallurgischen Gefäßes über zumindest einen Teil der Längserstreckung des Gießstrahles erstreckenden Mantel aufweist, der eine mittels einer Abdeckung verschließbare Öffnung aufweist.The invention relates to a device on a metallurgical vessel with a protective tube for a metal pouring jet flowing from an outlet opening of the vessel, in particular at an intermediate vessel of a continuous casting installation, the protective tube surrounding the pouring jet peripherally and extending from the outlet opening of the metallurgical vessel over at least part of the Has longitudinal extension of the pouring stream extending jacket which has an opening which can be closed by means of a cover.

Bei Stranggießanlagen wird üblicherweise die Schmelze von einer Gießpfanne in ein Zwischengefäß gegossen und strömt vom Zwischengefäß durch eine Austrittsöffnung in eine unterhalb des Zwischengefäßes angeordnete Durchlaufkokille. Um Reaktionen des Gießstrahles mit dem Luftsauerstoff zu verhindern, wird der Gießstrahl durch ein Schutzrohr geleitet, welches Schutzrohr sich von der Austrittsöffnung des metallurgischen Gefäßes, d.h. bei Stranggießanlagen von der Pfanne bzw. vom Zwischengefäß, über zumindest einen Teil der Längserstreckung des Gießstrahles erstreckt. Das Schutzrohr taucht bei Brammen-Stranggießanlagen in die Schmelze des Zwischengefäßes bzw. der Kokille ein oder es endigt, wie bei Knüppel-Stranggießanlagen ausgeführt, im Abstand oberhalb des Badspiegels des Zwischengefäßes bzw. der Kokille. Zwecks Vermeidung von Oxidation des Gießstrahies ist das Schutzrohr an eine Gaszuführungsleitung zur Zufuhr eines inerten Gases angeschlossen.In continuous casting plants, the melt is usually poured from a ladle into an intermediate vessel and flows from the intermediate vessel through an outlet opening into a continuous mold arranged below the intermediate vessel. To prevent reactions of the pouring jet with the atmospheric oxygen, the pouring jet is passed through a protective tube, which protective tube extends from the outlet opening of the metallurgical vessel, i.e. in continuous casting plants from the pan or from the tundish, extends over at least part of the longitudinal extent of the pouring stream. In the case of continuous slab caster, the protective tube is immersed in the melt of the intermediate vessel or the mold, or it ends, as was the case with billet continuous caster, at a distance above the bath level of the intermediate vessel or the mold. In order to avoid oxidation of the pouring stream, the protective tube is connected to a gas supply line for supplying an inert gas.

Zu Beginn des Gießens ist es oft notwendig, die Austrittsöffnung der Pfanne bzw. des Zwischengefäßes mit Hilfe einer Sauerstofflanze aufzubrennen. Es kann auch erforderlich sein, den « Vorlauf », d.h. die mit Verunreinigungen durchsetzte Schmelze zu Beginn des Gießens, mittels einer unter die Bodenöffnung schwenkbaren Rinne am Eintritt in das Zwischengefäß bzw. in die Kokille zu hindern und in einen Auffangbehälter zu leiten. Es ist bekannt, das Schutzrohr erst nach Durchführung der geschilderten Maßnahmen, also Aufbrennen der Austrittsöffnung bzw. Wegschwenken der Ablaufrinne von der Seite her in Stellung zu bringen, wobei ein Teil des oberen Randes des Schutzrohres durch den Gießstrahl hindurchbewegt werden muß. Dies hat zur Folge, daß Schmelze bei Auftreffen des Gießstrahles auf den Schutzrohrrand verspritzt wird, wobei sich Schmelze am Schutzrohrrahd und am Schutzrohr selbst festsetzt und eine einwandfreie dichte Montage des Schutzrohres an der Gießpfanne bzw. am Zwischengefäß erschwert. Durch das Besprühen von Schmelze wird die Bedienungsmannschaft gefährdet.At the beginning of the pouring process, it is often necessary to burn off the outlet opening of the pan or the intermediate vessel using an oxygen lance. It may also be necessary to carry out the "advance", i.e. to prevent the melt, which is contaminated with impurities, at the start of the pouring, by means of a channel which can be pivoted under the bottom opening, from entering the tundish or the mold, and to lead it into a collecting container. It is known to bring the protective tube into position only after carrying out the measures described, that is to say burning the outlet opening or pivoting away the drainage channel, part of the upper edge of the protective tube having to be moved through the pouring jet. This has the consequence that the melt is sprayed when the pouring jet strikes the edge of the protective tube, the melt attaching itself to the protective tube wire and the protective tube itself and making it difficult to install the protective tube properly on the ladle or on the tundish. Spraying the melt puts the operating team at risk.

Beim Gießen aluminiumberuhigter Stähle oder bei niedriger Schmelzentemperatur kommt es nach einer bestimmten Betriebsdauer zu einem Zuwachsen der Austrittsöffnung, so daß man gezwungen ist, während des Gießens von Zeit zu Zeit die Austrittsöffnung zu beobachten, zu welchem Zweck bisher-das Schutzrohr - mit den oben angeführten Nachteilen - wiederum seitlich entfernt, also quer zur Richtung des Gießstrahles durch diesen hindurchbewegt werden mußte.When casting aluminum-calmed steels or at a low melt temperature, the outlet opening grows after a certain operating time, so that one is forced to observe the outlet opening from time to time during the casting, for which purpose - the protective tube - with the ones listed above Disadvantages - again laterally removed, that is, had to be moved transversely to the direction of the pouring jet.

Bei einer Einrichtung der eingangs beschriebenen Art ist es aus der CH-A-571 908 bekannt, an dem Schutzrohr eine seitliche, verschließbare Öffnung vorzusehen, durch welche zum Aufbrennen der Ausgießöffnung eine sauerstoffördernde Lanze eingebracht werden kann. Das Schutzrohr selbst läßt sich jedoch vom Zwischengefäß nicht ohne Unterbrechung des Gießbetriebes aus- und einbauen, es sei denn, man nimmt das nachteilige Auftreffen des Gießstrahles auf den oberen Rand des Schutzrohres in Kauf.In a device of the type described at the outset, it is known from CH-A-571 908 to provide a side, closable opening on the protective tube through which an oxygen-promoting lance can be introduced to burn the pouring opening. However, the protective tube itself cannot be removed and installed from the tundish without interrupting the casting operation, unless one accepts the disadvantageous impact of the pouring jet on the upper edge of the protective tube.

Die Erfindung bezweckt die Vermeidung dieser Nachteile und Schwierigkeiten und stellt sich die Aufgabe, eine Einrichtung der eingangs beschriebenen Art zu schaffen, bei der es möglich ist, das Schutzrohr jederzeit während des Gießbetriebes, also ohne Unterbrechung des Gießbetriebes aus-und einzubauen, beispielsweise zu ersetzen durch ein anderes oder beispielsweise erst dann in Stellung zu bringen, wenn der Vorlauf aus dem metallurgischen Gefäß ausgeströmt ist, ohne daß Schmelze auf das Schutzrohr auftrifft.The invention aims to avoid these disadvantages and difficulties and has as its object to create a device of the type described in the introduction, in which it is possible to remove and install, for example, replace the protective tube at any time during the casting operation, that is to say without interrupting the casting operation to be brought into position by another or, for example, only when the flow has flowed out of the metallurgical vessel without the melt striking the protective tube.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Öffnung des Mantels als Schlitz ausgebildet ist, der sich über die gesamte Länge des Mantels erstreckt und dessen Breite größer ist als der Durchmesser des Gießstrahles und daß der Mantel mittels eines Schnellverschlusses an dem metallurgischen Gefäß lösbar befestigt ist.This object is achieved in that the opening of the jacket is designed as a slot which extends over the entire length of the jacket and its width is greater than the diameter of the pouring jet and that the jacket is releasably attached to the metallurgical vessel by means of a quick-release fastener .

Eine bevorzugte Ausführungsform ist dadurch gekennzeichnet, daß der Mantel und die Abdeckung dicht an einer an sich bekannten an der Austrittsöffnung vorgesehenen und diese peripher umgebenden Gaszuführungseinrichtung befestigbar ist.A preferred embodiment is characterized in that the jacket and the cover can be fastened tightly to a gas supply device known per se provided at the outlet opening and surrounding it peripherally.

Zweckmäßig ist der Schnellverschluß aus zwei einander gegenüberliegenden, in am Zwischengefäß montierte Führungsschienen eingreifenden Haken gebildet. Dadurch ist ein Verschieben des Schutzrohres entlang der Führungsschienen zwecks Montage und Demontage ohne Behinderung durch den vom Zwischengefäß vorstehenden Ausgießstein möglich.The quick-release fastener is expediently formed from two mutually opposite hooks which engage in guide rails mounted on the intermediate vessel. This makes it possible to move the protective tube along the guide rails for assembly and disassembly without being impeded by the pouring stone protruding from the intermediate vessel.

Die Erfindung ist nachstehend an einem Ausführungsbeispiel anhand der Zeichnung näher erläutert, wobei

  • Figur 1 einen Schnitt durch die Bodenöffnung eines Zwischengefäßes und durch eine darunter angeordnete Kokille,
  • Figur 2 einen Schnitt gemäß der Linie II-II der Fig. 1 und
  • Figur 3 ein erfindungsgemäßes Schutzrohr im Schrägriß zeigen.
The invention is explained below using an exemplary embodiment with reference to the drawing, wherein
  • 1 shows a section through the bottom opening of an intermediate vessel and through a mold arranged underneath,
  • Figure 2 shows a section along the line II-II of Fig. 1 and
  • Figure 3 shows a protective tube according to the invention in oblique view.

Aus dem Zwischengefäß 1 strömt die Stahlschmelze 2, beispielsweise aluminiumberuhigte Stahlschmelze, durch eine im Boden des Gefäßes vorgesehene Austrittsöffnung 3, die in einem Ausgießstein 4 vorgesehen ist, in die unterhalb der Austrittsöffnung 3 angeordnete Durchlaufkokille 5. Es handelt sich hierbei um eine Knüppelgießkokille. Die Größe des Querschnittes der Austrittsöffnung 3 ist hierbei nicht regulierbar. Die richtige Höhe des Badspiegels 6 in der Kokille 5 wird durch Abstimmung der Höhe der Stahlschmelze 2 im Zwischengefäß 1 und die Ausziehgeschwindigkeit des Stranges aus der Kokille 5 geregelt. Eine Abdeckschlacke ist auf dem Badspiegel 6 nicht vorgesehen. Zum Schutz des aus der Austrittsöffnung austretenden Gießstrahles 7 ist an der Unterseite des Zwischengefäßes ein Schutzrohr 8 vorgesehen, welches mittels eines Schnellverschlusses 9 am Zwischengefäß lösbar montiert ist. Der Schnellverschluß 9 ist aus zwei einander gegenüberliegenden, in am Zwischengefäß montierte Führungsschienen 10 eingreifenden Haken 11 ausgebildet. Die Führungsschienen 10 sind im Abstand unterhalb der Bodenplatte des Zwischengefäßes angeordnet, so daß ein Verschieben des Schutzrohres entlang der Führungsschienen zwecks Montage und Demontage ohne Behinderung durch den vom Zwischengefäß vorstehenden Ausgießstein möglich ist. Die Führungsschienen 10 sind an einem zylindrischen Ringkörper 12 angeschweißt, welcher Ringkörper über einen radial nach außen gerichteten Flansch 13 an einem weiteren, zum ersten Ringkörper 12 konzentrisch angeordneten, am Zwischengefäß lösbar befestigten Ringkörper 14 montiert ist. In diesen zweiten Ringkörper 14 ist eine Gaszuführungsleitung 15 zur Zuführung inerten Schutzgases eingesetzt. Der Ringkörper 12 bewirkt eine gleichmäßige Verteilung des Schutzgases um den Gießstrahl 7. Der Mantel 16 des Schutzrohres 8 umgibt den Gießstrahl 7 mit peripherem Abstand und endigt im Abstand oberhalb des Badspiegels in der Kokille. Da bei dem dargestellten Ausführungsbeispiel die Kokille nur einen sehr kleinen Durchmesser hat, endigt der Mantel 16 oberhalb der Kokille. Das Schutzgas, welches unter mäanderförmiger Umleitung um den ersten Ringkörper 12 in das Schutzrohr 8 einströmt, gelangt durch den zwischen Kokillenoberseite 17 und unterem Rand 18 des Schutzrohres gebildeten Spalt 19 ins Freie. Das Schutzrohr weist eine Öffnung 20 im Mantel auf, die als durchgehender, d.h..sich über die gesamte Länge 21 des Schutzrohres 8 erstreckender Schlitz ausgebildet ist. Die Breite 22 des Schlitzes 20 ist größer bemessen als der Durchmesser 23 des Gießstrahles 7. Dieser Schlitz 20 ist durch einen an der Außenseite des Mantels 16 angeordneten Schieber 24, der in Umfangsrichtung des Mantels bewegbar ist, verschließbar. Zur Führung des Schiebers 24 dienen zwei Führungszapfen 25. Eine Dichtleiste 26 sorgt für einen guten Verschluß. Der Schieber kann mittels eines Handgriffes 27 geöffnet bzw. geschlossen werden.The steel flows out of the intermediate vessel 1 melt 2, for example aluminum-soaked steel melt, through an outlet opening 3 provided in the bottom of the vessel, which is provided in a pouring stone 4, into the continuous mold 5 arranged below the outlet opening 3. This is a billet casting mold. The size of the cross section of the outlet opening 3 cannot be regulated here. The correct height of the bath level 6 in the mold 5 is regulated by coordinating the height of the molten steel 2 in the tundish 1 and the rate at which the strand is pulled out of the mold 5. A cover slag is not provided on the bathroom mirror 6. To protect the pouring jet 7 emerging from the outlet opening, a protective tube 8 is provided on the underside of the intermediate vessel and is detachably mounted on the intermediate vessel by means of a quick-release fastener 9. The quick-release fastener 9 is formed from two opposing hooks 11 which engage in guide rails 10 mounted on the intermediate vessel. The guide rails 10 are arranged at a distance below the base plate of the intermediate vessel, so that the protective tube can be moved along the guide rails for assembly and disassembly without being impeded by the pouring stone protruding from the intermediate vessel. The guide rails 10 are welded to a cylindrical ring body 12, which ring body is mounted via a radially outwardly directed flange 13 to a further ring body 14, which is arranged concentrically to the first ring body 12 and is detachably fastened to the intermediate vessel. A gas supply line 15 for supplying inert protective gas is inserted into this second annular body 14. The ring body 12 causes a uniform distribution of the protective gas around the pouring jet 7. The jacket 16 of the protective tube 8 surrounds the pouring jet 7 at a peripheral distance and ends at a distance above the bath level in the mold. Since the mold has only a very small diameter in the illustrated embodiment, the jacket 16 ends above the mold. The protective gas, which flows in a meandering diversion around the first ring body 12 into the protective tube 8, passes through the gap 19 formed between the upper side 17 of the mold and the lower edge 18 of the protective tube. The protective tube has an opening 20 in the jacket, which is designed as a continuous slot, ie, extending over the entire length 21 of the protective tube 8. The width 22 of the slot 20 is larger than the diameter 23 of the pouring jet 7. This slot 20 can be closed by a slide 24 arranged on the outside of the jacket 16 and movable in the circumferential direction of the jacket. Two guide pins 25 are used to guide the slide 24. A sealing strip 26 ensures a good closure. The slide can be opened or closed by means of a handle 27.

Erweist es sich als notwendig, die Austrittsöffnung 3 während des Gießbetriebes aufzubrennen bzw. Ansätze abzubrennen, braucht nur der Schieber geöffnet zu werden, worauf durch den Schlitz eine Sauerstofflanze eingeführt und die notwendige Wartungsarbeit an der Austrittsöffnung durchgeführt werden kann. Zu Beginn des Gießens wird der Vorlauf durch eine in Richtung der Pfeile 28 der Fig. 1 bis unterhalb der Austrittsöffnung schwenkbare Ablaufrinne 29 in eine Notkokille geleitet. Diese Ablaufrinne ist zweckmäßig so gestaltet, daß sie ebenfalls durch den Schlitz 20 des Schutzrohres 8 einführbar ist. Beispielsweise kann das Ende der Ablaufrinne in Richtung zur Gießstrahlachse gebogen sein, so daß bei einer Schwenkbewegung der Ablaufrinne ihr Ende in den Schlitz 20 des Schutzrohres 8 eintritt, ohne durch den Mantel des Schutzrohres behindert zu sein. Es kann aber auch das Schutzrohr erst nach Gießbeginn, also nachdem der Vorlauf über die Ablaufrinne abgeleitet worden ist, in Stellung gebracht werden, wobei das Schutzrohr mit geöffnetem Schieber 24 entlang der Führungsschienen 13 zu einem Anschlag 30 bis unterhalb der Austrittsöffnung bewegt wird und der Gießstrahl 7 durch den Schlitz 20 des Mantels hindurchtritt. Ein Auftreffen des Gießstrahles 7 auf irgendwelche Teile des Schutzrohres 8 wird dabei vermieden. Ebenso ist ein Auswechseln des Schutzrohres jederzeit während des Gießbetriebes möglich, ohne daß der Gießstrahl auf das Schutzrohr auftrifft.If it proves necessary to burn the outlet opening 3 during the casting operation or to burn off approaches, only the slide needs to be opened, whereupon an oxygen lance can be inserted through the slot and the necessary maintenance work can be carried out at the outlet opening. At the beginning of the casting, the flow is passed into an emergency mold through a drainage channel 29 which can be pivoted in the direction of the arrows 28 in FIG. 1 to below the outlet opening. This gutter is appropriately designed so that it can also be inserted through the slot 20 of the protective tube 8. For example, the end of the gutter can be bent in the direction of the pouring jet axis, so that when the gutter swivels, its end enters the slot 20 of the protective tube 8 without being obstructed by the jacket of the protective tube. However, the protective tube can also be brought into position only after the start of pouring, that is to say after the flow has been drained off via the drainage channel, the protective tube being moved along the guide rails 13 with the slide 24 open to a stop 30 below the outlet opening and the pouring jet 7 passes through the slot 20 of the jacket. An impact of the pouring jet 7 on any part of the protective tube 8 is avoided. It is also possible to replace the protective tube at any time during the casting operation, without the pouring jet hitting the protective tube.

Die Erfindung beschränkt sich nicht auf das dargestellte Ausführungsbeispiel, sondern kann in verschiedener Hinsicht modifiziert werden, beispielsweise kann das Schutzrohr auch dazu dienen, Stahlschmelze beim Ausströmen aus einer Gießpfanne in einZwischengefäß zu schützen. Es kann auch beim Stahl-Brammengießen sowie ganz allgemein bei Umfüllvorgängen von Metallschmelzen Verwendung finden, bei denen der Metallstrahl vor Verunreinigungen geschützt sein soll.The invention is not limited to the exemplary embodiment shown, but can be modified in various ways, for example the protective tube can also serve to protect molten steel as it flows out of a ladle into an intermediate vessel. It can also be used in steel slab casting and, more generally, in transferring metal melts where the metal jet is to be protected from contamination.

Mit dem beschriebenen Schutzrohr ist es möglich, auch legierte bzw. hoch kohlenstoffhältige Stähle in besten Qualitäten in Mehrstranggießanlagen zu vergießen, wofür bisher Schnorchelguß verwendet wurde. Beim Schnorchelguß war es jedoch nicht möglich, bei Mehrstranggießanlagen und kleinen Kriüppelquerschnitten ein zentrisches Eintauchen des Schnorchels zu erreichen, wodurch Qualitätseinbußen in Kauf genommen werden mußten.With the protective tube described, it is also possible to cast alloyed or high-carbon steels in the best qualities in multi-strand casting plants, for which snorkel casting has previously been used. In the case of snorkel casting, however, it was not possible to achieve a central immersion of the snorkel in multi-strand casting plants and small cripple cross sections, which meant that losses in quality had to be accepted.

Claims (3)

1. Arrangement at a metallurgical vessel (1) including a protection tube (8) for a metal casting jet (7) streaming out of an outlet opening (3) of the vessel, in particular at a tundish (1) of a continuous casting plant, wherein the protection tube (8) comprises a jacket (16) peripherally surrounding the casting jet (7) and extending from the outlet opening (3) of the metallurgical vessel over at least part of the longitudinal extension of the casting jet (7), the jacket including an opening (20) that is closeable by means of a covering (24), characterised in that the opening (20) of the jacket (16) is designed as a slot extending over the total length (21) of the jacket and whose width (22) is larger than the diameter (23) of the casting jet (7), and in that the jacket (16) is detachably fastened to the metallurgical vessel (1) by means of a quick lock (9).
2. Arrangement according to claim 1 characterised in that the jacket (16) and the covering (24) are tightly fastenable to a gas supply means (12 to 15) known per se provided at the outlet opening (3) and surrounding the same peripherally.
3. Arrangement according to claim 1 or 2, characterised in that the quick lock (9) is formed by two oppositely arranged hooks (11) engaging in guide rails (10) mounted at the tundish (1).
EP19800890019 1979-02-20 1980-02-13 Installation for a metallurgical vessel with a protective tube Expired EP0015251B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1287/79 1979-02-20
AT128779A AT368415B (en) 1979-02-20 1979-02-20 INSTALLATION ON A METALLURGICAL TUBE WITH A PROTECTIVE PIPE

Publications (2)

Publication Number Publication Date
EP0015251A1 EP0015251A1 (en) 1980-09-03
EP0015251B1 true EP0015251B1 (en) 1982-06-30

Family

ID=3510620

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800890019 Expired EP0015251B1 (en) 1979-02-20 1980-02-13 Installation for a metallurgical vessel with a protective tube

Country Status (7)

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EP (1) EP0015251B1 (en)
JP (1) JPS55114450A (en)
AT (1) AT368415B (en)
BR (1) BR8000915A (en)
CA (1) CA1157227A (en)
DE (1) DE3060604D1 (en)
ES (1) ES488721A0 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103350222A (en) * 2013-07-12 2013-10-16 抚顺特殊钢股份有限公司 Novel argon gas protecting device for die casting

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2490123A1 (en) * 1980-09-15 1982-03-19 Air Liquide PLATE SHUTTER DEVICE FOR CONTAINER CASTING HOLES CONTAINING A FUSION METAL
ZA821071B (en) * 1981-03-03 1983-01-26 Flogates Ltd Improvements in the pouring of molten metals
DE3342071C2 (en) * 1983-11-22 1986-08-07 Didier-Werke Ag, 6200 Wiesbaden Device for shielding a metallic pouring stream
FR2586210B1 (en) * 1985-08-14 1988-05-13 Air Liquide DEVICE FOR PROTECTION AGAINST OXIDATION AND / OR NITRURATION OF A LIQUID METAL JET AND ITS USE
KR100864444B1 (en) * 2002-04-24 2008-10-20 주식회사 포스코 Device for preventing oxidation of hot iron in continuous casting plant
JP2012205968A (en) * 2009-08-07 2012-10-25 Kinotech Solar Energy Corp Liquid supply apparatus
CN112024866B (en) * 2020-09-04 2021-12-21 攀钢集团攀枝花钢铁研究院有限公司 Full-sealed die casting pouring protection device

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Publication number Priority date Publication date Assignee Title
DE7008854U (en) * 1970-03-11 1970-11-26 Krupp Ag Huettenwerke DEVICE FOR PASTING UNDER SHIELD GAS.
CH570835A5 (en) * 1974-06-14 1975-12-31 Concast Ag Sealing casting tube to tundish outlet nozzle - for use in continuous casting of steel
CH598888A5 (en) * 1976-03-09 1978-05-12 Concast Ag
DE7631150U1 (en) * 1976-10-05 1977-04-28 Metacon Ag, Zuerich (Schweiz) METALLURGICAL VESSEL WITH A SPOUT
DE2800503A1 (en) * 1977-01-27 1978-08-03 Uss Eng & Consult DEVICE FOR ATTACHING A PIPE FOR A CASTING CONTAINER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103350222A (en) * 2013-07-12 2013-10-16 抚顺特殊钢股份有限公司 Novel argon gas protecting device for die casting

Also Published As

Publication number Publication date
CA1157227A (en) 1983-11-22
ES8100124A1 (en) 1980-11-01
BR8000915A (en) 1980-10-29
AT368415B (en) 1982-10-11
ATA128779A (en) 1982-02-15
EP0015251A1 (en) 1980-09-03
JPS55114450A (en) 1980-09-03
DE3060604D1 (en) 1982-08-19
ES488721A0 (en) 1980-11-01

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