EP0094926A1 - Orifice for injecting a protecting gas into a casting tube - Google Patents

Orifice for injecting a protecting gas into a casting tube Download PDF

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Publication number
EP0094926A1
EP0094926A1 EP83870047A EP83870047A EP0094926A1 EP 0094926 A1 EP0094926 A1 EP 0094926A1 EP 83870047 A EP83870047 A EP 83870047A EP 83870047 A EP83870047 A EP 83870047A EP 0094926 A1 EP0094926 A1 EP 0094926A1
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EP
European Patent Office
Prior art keywords
pouring tube
tube
annular channel
pouring
injecting
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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.)
Granted
Application number
EP83870047A
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German (de)
French (fr)
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EP0094926B1 (en
Inventor
Tom P. Hamilton
Roberto Grosso
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Vesuvius International Corp
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Vesuvius International Corp
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Publication of EP0094926A1 publication Critical patent/EP0094926A1/en
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Publication of EP0094926B1 publication Critical patent/EP0094926B1/en
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/072—Treatment with gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/58—Pouring-nozzles with gas injecting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/14—Charging or discharging liquid or molten material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge

Definitions

  • the present invention relates to a pouring tube made of refractory material having at its upper part orifices for injecting a protective gas in order to prevent oxidation of the molten metal and to cool the walls of said pouring tube. It relates to a pouring tube provided with protective gas injection orifices having a particular arrangement and shape.
  • the present invention finds wide application in the continuous casting of steel, during which the latter is discharged from a ladle to a degassing enclosure or to a basket, and from the latter to a mold or to an ingot mold.
  • the duration of the casting operation and the large contact surface that the metal presents to the air make the implementation of means inevitable creating a protective atmosphere protecting all the free surfaces of the metal from oxidation.
  • British patent 2,013,856 discloses a method and an apparatus for controlling and regulating, in particular in continuous casting, the discharge rate of a container provided with a sliding closure device and a pouring tube. .
  • the upper part of the pouring tube is embedded in a recess provided in the lower face of a fixed lower plate of said sliding closure device.
  • the recess is lined with a metal ring and is connected to an annular channel through which an inert or reducing gas is injected.
  • This metal ring is intended to form a baffle in order to prevent the infiltration of steel into the annular channel while allowing the passage of gas.
  • a device for replacing the pouring tube mounted on the discharge orifice of a ladle is known from American patent 4,079,869.
  • the gas stream which is generally argon, is used primarily to cool the pouring tube.
  • the gas is brought in by simple ramps distributing it as quickly as possible over the surfaces to be protected.
  • the gas pipes are provided in the movable arms of the support frame.
  • the injection ports are formed in the annular flange on which the tube and the fixing fork rests.
  • the object of the present invention is to avoid the drawbacks mentioned above. It relates to a refractory material pouring tube having at its upper part injection orifices for a protective gas during the casting operation in the flow of molten metal in order to prevent oxidation of that -this and to cool the walls of the pouring tube, this tube being essentially characterized in that it has a frustoconical part on which is fixed an assembly collar intended to apply it against a bottom plate of an orifice discharge from a ladle and in which are formed along certain generators of the truncated cone, injection grooves connected to each other at their upper part by an annular channel connected via a support ring to a source of shielding gas.
  • the aforementioned injection grooves are regularly distributed along the aforesaid frustoconical part.
  • the source of shielding gas is a source of inert gas, in particular argon.
  • the gas injection device according to the invention is mounted on the bottom of a ladle, designated as a whole by the reference notation 1 and intended to treat a bath of molten metal.
  • a bottom plate 2 surrounds a discharge orifice 3 of the ladle 1 provided with a closure device 4.
  • the closure device 4 consists of a movable anchor plate 5 made of refractory material, possibly consisting of several elements 6 each having an orifice 7 on which is fixed a pouring tube 8 having a cylindrical flow channel 9 of determined diameter.
  • the upper part of the pouring tube 8 is flared. It carries a fixing collar 10 intended to apply the pouring tube 8 against the bottom plate 2 provided with the orifice 3 for discharging a ladle.
  • the flared part in fact determines a truncated cone, located in the extension of the channel of the pouring tube 8.
  • grooves 11 are provided for injection. These grooves 11 are connected to each other at their upper part by an annular channel 12, possibly embedded in the mass of the fixing collar 10 of the tube 8.
  • a radial duct 13 connects the annular channel 12 to the support ring 14 at the source protective gas 15, possibly by means of oscillating arms 16.
  • the flared part of the pouring tube 8 is arranged below a constriction 17 of the discharge orifice 3 of the ladle 1.
  • the fixing collar 10 of the pouring tube 8 shown in FIG. 1, surrounds the upper edge of the flared part of said pouring tube 8.
  • the circular channel is formed by the annular wall of the fixing collar 10 and the base of a cylindrical or frustoconical part 18 which fits into the pouring tube forming a constriction 17 in the pouring channel.
  • This constriction 17 which, during the casting operation, acts like a Venturi tube, creates a depression.
  • This depression has the effect of sucking in the pouring tube 8, during the casting operation through the injection grooves provided in the pouring tube 8, a gas or mixture of protective gases and distributing it. along the walls of the pouring tube 8 in order to protect the free surfaces of the metal from oxidation.
  • the presence of air in the pouring tube causes a reduction in the quality of the casting metal due to the formation of exogenous blowing caused by the air driven mechanically during the casting.
  • the oxidized metal tends to stick in the pouring tube 8 and to give a film of oxides which, in the case of an ingot mold, can be the cause of skin defects.
  • the present invention allows above all to keep the injection grooves free even in case of interruption of the casting operation.
  • the injection of a protective gas also makes it possible to cool the internal wall of the pouring tube 8 made of refractory material.
  • This tube 8 is subjected to a considerable thermal and chemical attack. Among other things, it is subject to significant erosion.
  • the injection of shielding gas makes it possible to reduce or partially avoid this erosion.
  • the pouring tube 8 must therefore be replaced less often. This is moreover, with a view to frequent replacement of this pouring tube, a support fork is provided to keep it in place.
  • the fixing collar surrounds the entire frustoconical part of the pouring tube so as to form a more solid assembly.
  • This second embodiment gives sufficient solidity even if the annular channel 12 is embedded in the mass of the fixing collar 10.
  • Nitrogen is not suitable as a shielding gas because it causes the formation of nitrides. Generally, argon is used.

Abstract

Un tube de coulée (8) en matière réfractaire, présente à sa partie supérieure une série d'orifices d'injection d'un gaz de protection, par exemple de l'argon, en vue de créer une atmosphère protectrice contre l'oxydation du métal et de refroidir les parois du tube de coulée. Les orifices d'injection suivant l'invention sont des rainures (11) ménagées dans la partie supérieure de forme tronconique du tube de coulée (8) sur laquelle est fixé un collet d'assemblage (10). Ces rainures sont reliée entre elles par un canal annulaire (12).A pouring tube (8) of refractory material, has at its upper part a series of orifices for injecting a protective gas, for example argon, in order to create a protective atmosphere against oxidation of the metal and cool the walls of the pouring tube. The injection orifices according to the invention are grooves (11) formed in the upper frustoconical shape of the pouring tube (8) on which is fixed an assembly collar (10). These grooves are connected together by an annular channel (12).

Description

La présente invention concerne un tube de coulée en matière réfractaire présentant à sa partie supérieure des orifices d'injection d'un gaz de protection en vue d'éviter l'oxydation du métal en fusion et de refroidir les parois dudit tube de coulée. Elle concerne un tube de coulée muni d'orificesd'injection d'un gaz de protection ayant une disposition et une forme particulières.The present invention relates to a pouring tube made of refractory material having at its upper part orifices for injecting a protective gas in order to prevent oxidation of the molten metal and to cool the walls of said pouring tube. It relates to a pouring tube provided with protective gas injection orifices having a particular arrangement and shape.

La présente invention trouve une large application dans la coulée continue de l'acier, au cours de laquelle celui-ci est déchargé d'une poche de coulée vers une enceinte de dégazage ou vers un panier, et de ce dernier vers un moule ou vers une lingotière.The present invention finds wide application in the continuous casting of steel, during which the latter is discharged from a ladle to a degassing enclosure or to a basket, and from the latter to a mold or to an ingot mold.

La durée de l'opération de coulée et la grande surface de contact que le métal présente à l'air rendent inévitable la mise en oeuvre de moyens créant une atmosphère protectrice protégeant toutes les surfaces libres du métal de l'oxydation.The duration of the casting operation and the large contact surface that the metal presents to the air make the implementation of means inevitable creating a protective atmosphere protecting all the free surfaces of the metal from oxidation.

On connait par le brevet britannique 2 013 856, une méthode et un appareil pour contrôler'et régler, notamment en coulée continue, le débit de décharge d'un conteneur muni d'un dispositif d'obturation coulissant et d'un tube de coulée.British patent 2,013,856 discloses a method and an apparatus for controlling and regulating, in particular in continuous casting, the discharge rate of a container provided with a sliding closure device and a pouring tube. .

La partie supérieure du tube de coulée est encastrée dans un évidement prévu dans la face inférieure d'une plaque inférieure fixe dudit dispositif d'obturation coulissant.The upper part of the pouring tube is embedded in a recess provided in the lower face of a fixed lower plate of said sliding closure device.

L'évidement est garni d'un anneau métallique et est relié à un canal annulaire par lequel est injecté un gaz inerte ou réducteur. Cet anneau métallique est destiné à former une chicane en vue d'empêcher l'infiltration de l'acier dans le canal annulaire tout en permettant le passage du gaz.The recess is lined with a metal ring and is connected to an annular channel through which an inert or reducing gas is injected. This metal ring is intended to form a baffle in order to prevent the infiltration of steel into the annular channel while allowing the passage of gas.

Cette technique d'injection de gaz dans le tube de coulée présente cependant le grave inconvénient de ne pas empêcher l'obstruction d'une partie ou même de la totalité de l'orifice d'injection par du métal solidifié.This technique of injecting gas into the pouring tube however has the serious drawback of not preventing the obstruction of part or even of the whole of the injection orifice by solidified metal.

On connaît, d'autre part, par le brevet américain 4 079 869 un dispositif permettant de remplacer le tube de coulée monté sur l'orifice de décharge d'une poche de coulée. Le courant de gaz, qui est en général de l'argon, est utilisé avant tout pour refroidir le tube de coulée. Le gaz est amené par de simples rampes le répartissant le plus rapidement possible sur les surfaces à protéger. Comme dans le dispositif décrit ci-dessus, les conduites de gaz sont ménagées dans les bras mobiles du cadre support. Les orifices d'injection sont ménagés dans le rebord annulaire sur lequel s'appuie le tube et la fourche de fixation.On the other hand, a device for replacing the pouring tube mounted on the discharge orifice of a ladle is known from American patent 4,079,869. The gas stream, which is generally argon, is used primarily to cool the pouring tube. The gas is brought in by simple ramps distributing it as quickly as possible over the surfaces to be protected. As in the device described above, the gas pipes are provided in the movable arms of the support frame. The injection ports are formed in the annular flange on which the tube and the fixing fork rests.

Ces orifices ronds affleurent sur la paroi intérieure du tube sans protection particulière. L'expérience a montré qu'il n'est pas possible de répartir uniformément sur la surface intérieure du tube de coulée, les gaz inertes et d'abaisser partout la teneur en oxygène à un niveau suffisamment faible pour rendre l'oxydation du métal négligeable.These round holes are flush with the inside wall of the tube without any special protection. Experience has shown that it is not possible to distribute the inert gases uniformly over the inner surface of the pouring tube and to lower the oxygen content to a level everywhere low enough to make oxidation of the metal negligible.

Les dimensions réduites de ces orifices favorisent leur obstruction rapide lors de chaque interruption de la coulée. La protection du métal par un gaz est donc difficile à réaliser et, si elle est sqmmairement faite, elle a toute chance de n'être qu'illusoire.The reduced dimensions of these orifices favor their rapid obstruction during each interruption of the casting. The protection of the metal by a gas is therefore difficult to achieve and, if it is done, it is likely to be only an illusion.

La présente invention a pour but d'éviter les inconvénients mentionnés ci-dessus. Elle a pour objet un tube de coulée en matière réfractaire présentant à sa partie supérieure des orifices d'injection d'un gaz de protection pendant l'opération de coulée dans le flux de métal en fusion en vue d'éviter l'oxydation de celui-ci et de refroidir les parois du tube de coulée, ce tube étant essentiellement caractérisé en ce qu'il présente une partie tronconique sur laquelle est fixé un collet d'assemblage destiné à l'appliquer contre une plaque de fond d'un orifice de décharge d'une poche de coulée et dans laquelle sont ménagés le long de certaines génératrices du tronc de cône, des rainures d'injection reliées entre elles à leur partie supérieure par un canal annulaire connecté par l'intermédiaire d'un anneau support à une source de gaz de protection.The object of the present invention is to avoid the drawbacks mentioned above. It relates to a refractory material pouring tube having at its upper part injection orifices for a protective gas during the casting operation in the flow of molten metal in order to prevent oxidation of that -this and to cool the walls of the pouring tube, this tube being essentially characterized in that it has a frustoconical part on which is fixed an assembly collar intended to apply it against a bottom plate of an orifice discharge from a ladle and in which are formed along certain generators of the truncated cone, injection grooves connected to each other at their upper part by an annular channel connected via a support ring to a source of shielding gas.

Suivant une particularité de l'invention, les rainures d'injection susdites sont régulièrement réparties le long de la partie tronconique susdite.According to a feature of the invention, the aforementioned injection grooves are regularly distributed along the aforesaid frustoconical part.

Suivant une autre particularité de l'invention, la source de gaz de protection est une source de gaz inerte, en particulier de l'argon.According to another feature of the invention, the source of shielding gas is a source of inert gas, in particular argon.

D'autres détails et particularités de l'invention apparaitront au cours de la description détaillée suivante de deux modes de réalisations particulières donnés à titre purement illustratif d'un tube de coulée muni d'un dispositif d'injection d'un gaz de protection. Cette description détaillée fait référence aux dessins annexés, dans lesquels :

  • - la figure 1 est une coupe longitudinale d'un tube de coulée suivant l'invention, dont le collet de fixation est fixé au bord supérieur du tube;
  • - la figure 2 est une vue en plan du tube de coulée montré à la figure 1;
  • - les figures 3 et 4 sont semblables aux figures 1 et 2, illustrant un tube de coulée dont le canal annulaire est noyé dans le collet de fixation.
Other details and particularities of the invention will appear during the following detailed description of two particular embodiments given purely by way of illustration of a pouring tube provided with a device for injecting a protective gas. This detailed description refers to the accompanying drawings, in which:
  • - Figure 1 is a longitudinal section of a pouring tube according to the invention, the fixing collar is fixed to the upper edge of the tube;
  • - Figure 2 is a plan view of the pouring tube shown in Figure 1;
  • - Figures 3 and 4 are similar to Figures 1 and 2, illustrating a pouring tube whose annular channel is embedded in the fixing collar.

Comme montré à la figure 1, le dispositif d'injection de gaz suivant l'invention est monté sur le fond d'une poche de coulée, désignée dans son ensemble par la notation de référence 1 et destiné à traiter un bain de métal fondu. Une plaque de fond 2 entoure un orifice de décharge 3 de la poche de coulée 1 munie d'un dispositif d'obturation 4.As shown in Figure 1, the gas injection device according to the invention is mounted on the bottom of a ladle, designated as a whole by the reference notation 1 and intended to treat a bath of molten metal. A bottom plate 2 surrounds a discharge orifice 3 of the ladle 1 provided with a closure device 4.

Le dispositif d'obturation 4 est constitué d'une plaque d'ancrage mobile 5 en matière réfractaire, constituée éventuellement de plusieurs éléments 6 présentant chacun un orifice 7 sur lequel est fixé un tube de coulée 8 présentant un canal d'écoulement cylindrique 9 de diamètre déterminé.The closure device 4 consists of a movable anchor plate 5 made of refractory material, possibly consisting of several elements 6 each having an orifice 7 on which is fixed a pouring tube 8 having a cylindrical flow channel 9 of determined diameter.

La partie supérieure du tube de coulée 8 est évasée. Elle porte un collet de fixation 10 destiné à appliquer le tube de coulée 8 contre la plaque de fond 2 pourvue de l'orifice 3 de décharge d'une poche de coulée. La partie évasée détermine en fait un tronc de cône, situé dans le prolongement du chenal du tube de coulée 8.The upper part of the pouring tube 8 is flared. It carries a fixing collar 10 intended to apply the pouring tube 8 against the bottom plate 2 provided with the orifice 3 for discharging a ladle. The flared part in fact determines a truncated cone, located in the extension of the channel of the pouring tube 8.

Le long de certaines génératrices de ce tronc de cône, sont ménagées des rainures 11 d'injection. Ces rainures 11 sont reliées entre elles à leur partie supérieure par un canal annulaire 12, éventuellement noyé dans la masse du collet de fixation 10 du tube 8. Un conduit radial 13 connecte le canal annulaire 12 à l'anneau de support 14 à la source de gaz 15 de protection, éventuellement par l'intermédiaire de bras oscillants 16.Along some generators of this truncated cone, grooves 11 are provided for injection. These grooves 11 are connected to each other at their upper part by an annular channel 12, possibly embedded in the mass of the fixing collar 10 of the tube 8. A radial duct 13 connects the annular channel 12 to the support ring 14 at the source protective gas 15, possibly by means of oscillating arms 16.

En position de service, la partie évasée du tube de coulée 8 est disposée en-dessous d'un étranglement 17 de l'orifice de décharge 3 de la poche de coulée 1.In the operating position, the flared part of the pouring tube 8 is arranged below a constriction 17 of the discharge orifice 3 of the ladle 1.

Le collet de fixation 10 du tube de coulée 8 montré à la figure 1, entoure le bord supérieur de la partie évasée dudit tube de coulée 8. Le canal circulaire est formé par la paroi annulaire du collet de fixation 10 et la base d'une pièce cylindrique ou tronconique 18 qui s'emboîte dans le tube de coulée en formant un étranglement 17 dans le chenal de coulée.The fixing collar 10 of the pouring tube 8 shown in FIG. 1, surrounds the upper edge of the flared part of said pouring tube 8. The circular channel is formed by the annular wall of the fixing collar 10 and the base of a cylindrical or frustoconical part 18 which fits into the pouring tube forming a constriction 17 in the pouring channel.

Cet étranglement 17, qui, au cours de l'opération de coulée, agit à la manière d'un tube Venturi, crée une dépression.This constriction 17, which, during the casting operation, acts like a Venturi tube, creates a depression.

Cette dépression a pour effet d'aspirer dans le tube de coulée 8, pendant l'opération de coulée par les rainures d'injection aménagées dans le tube de coulée 8, un gaz ou mélange de gaz de protection et de répartir celui-ci le long des parois du tube de coulée 8 en vue de protéger les surfaces libres du métal de l'oxydation.This depression has the effect of sucking in the pouring tube 8, during the casting operation through the injection grooves provided in the pouring tube 8, a gas or mixture of protective gases and distributing it. along the walls of the pouring tube 8 in order to protect the free surfaces of the metal from oxidation.

En effet, la présence d'air dans le tube de coulée entraine une diminution de la qualité du métal de coulée en raison de la formation de soufflures exogènes provoquées par l'air entrainé mécaniquement au cours de la coulée. En outre, le métal oxydé tend à coller dans le tube de coulée 8 et à donner une pellicule d'oxydes qui, dans le cas d'une lingotière, peut être à l'origine de défauts de peau.Indeed, the presence of air in the pouring tube causes a reduction in the quality of the casting metal due to the formation of exogenous blowing caused by the air driven mechanically during the casting. In addition, the oxidized metal tends to stick in the pouring tube 8 and to give a film of oxides which, in the case of an ingot mold, can be the cause of skin defects.

La présente invention permet avant tout de maintenir les rainures d'injection libres même en cas d'interruption de l'opération de coulée.The present invention allows above all to keep the injection grooves free even in case of interruption of the casting operation.

En maintenant l'ensemble des orifices d'injection libres et dégagés, elle permet une répartition homogène du gaz de protection. On peut ainsi abaisser partout autour du métal la teneur en oxygène à un niveau suffisamment faible pour que l'oxydation devienne négligeable.By keeping all of the injection ports free and clear, it allows a homogeneous distribution of the shielding gas. It is thus possible to lower everywhere around the metal the oxygen content to a sufficiently low level so that the oxidation becomes negligible.

L'injection d'un gaz de protection permet également de refroidir la paroi interne du tube de coulée 8 en matière réfractaire. Ce tube 8 est soumis à une attaque thermique et chimique considérablé. Il subit entre autre une érosion non négligeable. L'injection de gaz de protection permet de réduire ou d'éviter partiellement cette érosion. Le tube de coulée 8 doit alors être moins souvent remplacé. C'est d'ailleurs en vue du remplacement fréquent de ce tube de coulée que l'on prévoit une fourche support pour le maintenir en place.The injection of a protective gas also makes it possible to cool the internal wall of the pouring tube 8 made of refractory material. This tube 8 is subjected to a considerable thermal and chemical attack. Among other things, it is subject to significant erosion. The injection of shielding gas makes it possible to reduce or partially avoid this erosion. The pouring tube 8 must therefore be replaced less often. This is moreover, with a view to frequent replacement of this pouring tube, a support fork is provided to keep it in place.

Dans une seconde forme de réalisation, illustrée à la figure 3, le collet de fixation entoure toute la partie tronconique du tube de coulée de manière à former un ensemble plus solide.In a second embodiment, illustrated in FIG. 3, the fixing collar surrounds the entire frustoconical part of the pouring tube so as to form a more solid assembly.

Cette seconde forme de réalisation confère une solidité suffisante même au cas où le canal annulaire 12 est noyé dans la masse du collet de fixation 10.This second embodiment gives sufficient solidity even if the annular channel 12 is embedded in the mass of the fixing collar 10.

L'azote ne convient pas comme gaz de protection parce qu'il provoque la formation de nitrures. En général, on utilise de l'argon.Nitrogen is not suitable as a shielding gas because it causes the formation of nitrides. Generally, argon is used.

Il est évident que l'invention n'est pas limitée aux formes de réalisation décrites et que bien des modifications peuvent être apportées à la forme, la disposition, la composition de certains éléments intervenant dans celles-ci sans que l'on sorte pour autant du cadre de l'invention.It is obvious that the invention is not limited to the embodiments described and that many modifications can be made to the form, the arrangement, the composition of certain elements intervening in them without however being removed. of the scope of the invention.

Claims (5)

1. Tube de coulée en matière réfractaire présentant à sa partie supérieure des orifices d'injections d'un gaz de protection pendant l'opération de coulée dans le flux de métal en fusion en vue d'éviter l'oxydation de celui-ci et de refroidir les parois du tube de coulée, caractérisé en ce qu'il présente une partie tronconique sur laquelle est fixé un collet d'assemblage (10) destiné à l'appliquer contre une plaque de fond (2) d'un orifice de décharge (3) d'une poche de coulée (1) et dans laquelle sont ménagés, le long de certaines génératrices du tronc de cône, des rainures d'injection (11),reliées entre elles à leur partie supérieure par un canal annulaire (12) connecté par l'intermédiaire d'un anneau support à une source (15) de gaz de protection.1. pouring tube of refractory material having at its upper part orifices for injecting a shielding gas during the casting operation in the flow of molten metal in order to avoid oxidation thereof and to cool the walls of the pouring tube, characterized in that it has a frustoconical part on which is fixed an assembly collar (10) intended to apply it against a bottom plate (2) of a discharge orifice (3) a ladle (1) and in which are formed, along certain generators of the truncated cone, injection grooves (11), connected to each other at their upper part by an annular channel (12 ) connected via a support ring to a source (15) of shielding gas. 2. Tube de coulée suivant la revendication 1, caractérisé en ce que les rainures d'injection (11) sont régulièrement réparties le long de la partie tronconique susdite.2. pouring tube according to claim 1, characterized in that the injection grooves (11) are regularly distributed along the aforesaid frustoconical part. 3. Tube de coulée suivant l'une quelconque des revendications précédentes, caractérisé en ce que le canal annulaire (12) qui relie les rainures d'injection (11) susdites est formé par la paroi intérieure du collet de fixation du tube de coulée et la paroi extérieure d'un élément (18) qui s'emboîte dans ledit tube de coulée (8).3. pouring tube according to any one of the preceding claims, characterized in that the annular channel (12) which connects the aforementioned injection grooves (11) is formed by the inner wall of the collar for fixing the pouring tube and the outer wall of an element (18) which fits into said pouring tube (8). 4. Tube de coulée suivant l'une quelconque des revendications 1 et 2, caractérisé en ce que le canal annulaire (12) est noyé dans la masse du collet de fixation (10) du tube de coulée.4. pouring tube according to any one of claims 1 and 2, characterized in that the annular channel (12) is embedded in the mass of the fixing collar (10) of the pouring tube. 5. Tube de coulée suivant la revendication 1, caractérisé en ce que la source de gaz inerte susdit (15) est une source d'argon.5. pouring tube according to claim 1, characterized in that the above-mentioned source of inert gas (15) is a source of argon.
EP83870047A 1982-05-13 1983-05-11 Orifice for injecting a protecting gas into a casting tube Expired EP0094926B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE208080 1982-05-13
BE0/208080A BE893168A (en) 1982-05-13 1982-05-13 PROTECTION GAS INJECTION HOSE IN A CAST TUBE

Publications (2)

Publication Number Publication Date
EP0094926A1 true EP0094926A1 (en) 1983-11-23
EP0094926B1 EP0094926B1 (en) 1986-02-26

Family

ID=3843530

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83870047A Expired EP0094926B1 (en) 1982-05-13 1983-05-11 Orifice for injecting a protecting gas into a casting tube

Country Status (5)

Country Link
US (1) US4519438A (en)
EP (1) EP0094926B1 (en)
JP (1) JPS58209453A (en)
BE (1) BE893168A (en)
DE (1) DE3362258D1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3342071A1 (en) * 1983-11-22 1985-06-05 Didier-Werke Ag, 6200 Wiesbaden DEVICE FOR SHIELDING A METAL CASTING RAY
GB2179573A (en) * 1985-08-29 1987-03-11 British Steel Corp Metal-pouring equipment modified for protective gas injection
DE3624320A1 (en) * 1986-07-18 1988-01-28 Dahlhoff Friedrich Wilhelm Sealing of casting equipment by means of protective gas supply
EP0373555A2 (en) * 1988-12-14 1990-06-20 NUOVA SIRMA S.p.A. Improvement in processes and devices for the continuous casting of metals
EP0582496A1 (en) * 1992-07-29 1994-02-09 Sollac Internal pouring tube made from refractory material for metallurgical vessels
WO1995026439A1 (en) * 1994-03-25 1995-10-05 Asea Brown Boveri Inc. Smelt spout for a recovery furnace
KR100728512B1 (en) * 2000-03-01 2007-06-15 데구사 게엠베하 Process for the production of organosilylalkyl polysulfanes

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EP0240482B1 (en) * 1986-04-02 1990-09-19 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Installation for casting steel
DE3634893C1 (en) * 1986-10-14 1988-03-31 Didier Werke Ag Casting-pipe arrangement, particularly for launders in continuous casting installations
US4836508A (en) * 1988-05-03 1989-06-06 Vesuvius Crucible Company Ladle shroud with co-pressed gas permeable ring
US5067552A (en) * 1989-07-26 1991-11-26 Ltv Steel Company, Inc. Shrouding for top pouring of ingots
US5404929A (en) * 1993-05-18 1995-04-11 Liquid Air Corporation Casting of high oxygen-affinity metals and their alloys
US20090064821A1 (en) * 2006-08-23 2009-03-12 Air Liquide Industrial U.S. Lp Vapor-Reinforced Expanding Volume of Gas to Minimize the Contamination of Products Treated in a Melting Furnace
US20080184848A1 (en) * 2006-08-23 2008-08-07 La Sorda Terence D Vapor-Reinforced Expanding Volume of Gas to Minimize the Contamination of Products Treated in a Melting Furnace
US8403187B2 (en) * 2006-09-27 2013-03-26 Air Liquide Industrial U.S. Lp Production of an inert blanket in a furnace
JP5505969B2 (en) * 2010-03-15 2014-05-28 黒崎播磨株式会社 Long nozzle
JP5459851B2 (en) * 2010-03-31 2014-04-02 黒崎播磨株式会社 Long nozzle
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
CN106141159A (en) * 2015-04-13 2016-11-23 天工爱和特钢有限公司 A kind of argon protecting cover of high speed steel mould pouring in steel smelting

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FR2220451A1 (en) * 1973-03-05 1974-10-04 Jones & Laughlin Steel Corp
GB2013856A (en) * 1978-01-25 1979-08-15 Uss Eng & Consult Pouring of molten metal into a continuous caster mould

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BE662975A (en) * 1964-04-29 1965-10-25
US3558256A (en) * 1964-10-21 1971-01-26 Paderwerk Gebruder Benteler Apparatus for the continuous casting of metals
FR2220451A1 (en) * 1973-03-05 1974-10-04 Jones & Laughlin Steel Corp
GB2013856A (en) * 1978-01-25 1979-08-15 Uss Eng & Consult Pouring of molten metal into a continuous caster mould

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3342071A1 (en) * 1983-11-22 1985-06-05 Didier-Werke Ag, 6200 Wiesbaden DEVICE FOR SHIELDING A METAL CASTING RAY
GB2150059A (en) * 1983-11-22 1985-06-26 Didier Werke Ag Shielding a stream of molten metal from the atmosphere
GB2179573A (en) * 1985-08-29 1987-03-11 British Steel Corp Metal-pouring equipment modified for protective gas injection
DE3624320A1 (en) * 1986-07-18 1988-01-28 Dahlhoff Friedrich Wilhelm Sealing of casting equipment by means of protective gas supply
EP0373555A2 (en) * 1988-12-14 1990-06-20 NUOVA SIRMA S.p.A. Improvement in processes and devices for the continuous casting of metals
EP0373555A3 (en) * 1988-12-14 1991-11-21 NUOVA SIRMA S.p.A. Improvement in processes and devices for the continuous casting of metals
EP0582496A1 (en) * 1992-07-29 1994-02-09 Sollac Internal pouring tube made from refractory material for metallurgical vessels
WO1995026439A1 (en) * 1994-03-25 1995-10-05 Asea Brown Boveri Inc. Smelt spout for a recovery furnace
KR100728512B1 (en) * 2000-03-01 2007-06-15 데구사 게엠베하 Process for the production of organosilylalkyl polysulfanes

Also Published As

Publication number Publication date
DE3362258D1 (en) 1986-04-03
JPH0142787B2 (en) 1989-09-14
BE893168A (en) 1982-11-16
JPS58209453A (en) 1983-12-06
EP0094926B1 (en) 1986-02-26
US4519438A (en) 1985-05-28

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