EP0683706B1 - Casting tube - Google Patents

Casting tube Download PDF

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Publication number
EP0683706B1
EP0683706B1 EP94903708A EP94903708A EP0683706B1 EP 0683706 B1 EP0683706 B1 EP 0683706B1 EP 94903708 A EP94903708 A EP 94903708A EP 94903708 A EP94903708 A EP 94903708A EP 0683706 B1 EP0683706 B1 EP 0683706B1
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EP
European Patent Office
Prior art keywords
tube
collar
tubular element
thickness
casting
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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.)
Expired - Lifetime
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EP94903708A
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German (de)
French (fr)
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EP0683706A1 (en
Inventor
Stanislav Szadkowski
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International Industrial Engineering SA
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International Industrial Engineering SA
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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
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • 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
    • B22D41/56—Means for supporting, manipulating or changing a pouring-nozzle

Definitions

  • the present invention relates to a pouring tube comprising a tubular element having at an upper end, a perfectly flat upper face intended to slide in a device for feeding and changing the tube or a regulating device along the fixed underside of a reference or movable refractory plate of a drawer plate, the assembly of the upper end of the tubular element being reinforced by a collar and by a metal protective casing.
  • Document WO 89/02800 discloses a pouring tube for a sliding closure device formed from two separate parts generally made of different refractory ceramic materials.
  • the first part is a sliding tube plate made of alumina or magnesia, having a perfectly flat upper face intended to slide along a sliding plane
  • the second part is a cylindrical tubular element provided with a flange integral with the tubular element intended to be immersed in a mold.
  • the plate is attached to the tubular element by juxtaposition.
  • the clamping face of the seal between the insert plate and the flange is flat or interlocking. It is generally a simple nesting.
  • the flange and an upper part of the tubular element are covered with a protective metal casing, while the attached plate and the flank of the flange are enclosed in a hoop ring.
  • This embodiment in two separate parts, one of which is a plate, makes it possible to machine the sliding surface by grinding. A perfectly smooth sliding surface minimizes metal infiltration into the sliding plane.
  • This composite tube lies in the fact that the production of two flat surfaces is easier than that of an annular projection and a complementary groove.
  • Document FR-A-2241359 also discloses a submerged pouring tube having a channel of elliptical section, the wall of which has an increased thickness at the level of the major axis. This additional thickness is constant over the entire length of the pouring tube.
  • the oval-conical nozzle has a cross section of oval external shape as well as a flow channel of internal section of similar oval shape so that at the same section, the thickness of the wall is the same in all directions.
  • Vulnerable part of known pouring tubes is located at the level of the collar. This is where the mechanical reaction torque is exerted when changing the tube.
  • the plunging part of the tube moved parallel to itself from the standby position to the service position is in fact held back by the viscosity of the molten metal bath in the mold.
  • the present invention aims to solve this problem and provides a tube as described in the first paragraph of this specification.
  • the solution according to the invention consists in reinforcing the thickness of the tube not over the entire periphery and the entire length of the tubular element, but only in the most stressed places.
  • the present tube has at the collar and more particularly in the portions of walls oriented in the direction of movement of the tube, in order to reduce the risks of tube rupture, at the collar, an excess thickness of ceramic material by compared to the thickness of material at another cross section of the tubular element.
  • the collar is conical and of oblong cross section.
  • the collar is flush with the front and rear edges of the upper face, while it is set back from the lateral edges of said upper face. Therefore, the side flanges are free and can bear on the mechanical tube changing device.
  • the oblong shape of the collar in the direction of movement contributes to reinforcing its mechanical resistance to the thrust exerted by the rod when changing the pouring tube.
  • the oblong section serves to increase the moment of inertia and thereby reduce the risk of rupture.
  • the tubular element comprises, integral with it, an anchoring flange intended to fix an added plate, made of a refractory material different from the tubular element and subjected to a rectification in order to be better adapted to slide against the plate reference
  • the reinforcing collar is integral with said anchoring flange.
  • the collar is integral with them.
  • a pouring tube 1 is formed of a tubular element 2 having an internal central channel 3 of constant section and of an attached plate 4 of rectangular section.
  • the tubular element 2 is generally made of a refractory material resistant to erosion.
  • the body of the tubular element 2 may include an insert 5 of zirconium oxide intended to protect at least part of the external wall of the tube from the combined erosive action of steel and air at the location of the steel level in the mold.
  • the lower end of the tubular element 2 has lateral orifices 6, 7 which open in the direction of movement of the tube in a diametrically opposite manner. These orifices are intended to deflect the pouring jet and attenuate the erosive action of the eddies. (Fig. 1)
  • the upper end of the tubular element 2 carries a perfectly flat upper face forming an integral part of the tubular element 2.
  • the edge of the upper face and its junction with the upper end of the tubular element 2 of the tube are reinforced. by a collar 9 having on the side portions of walls directed in the direction of movement of the tube 1, an excess thickness of ceramic material, so as to have an oblong section. (Fig. 4)
  • the upper end of the tubular element has the same composition as the tubular element 2 and forms therewith the same single piece or entity. It can have either a simple interlocking surface (Fig. 1 and 3) or a flat surface (Fig. 5 and 6).
  • the first form is suitable for receiving an added plate 4.
  • the upper face of the plate is strictly flat to ensure the tightness of the tube 1 against the sliding plane of the plate. reference not shown, so as to avoid any aspiration of ambient atmospheric air. This makes it possible to prevent the formation of various oxides and bubbles in the mass of metal, considerably reducing the quality of the final product.
  • the present invention proposes to reinforce the thickness of the pouring tube only in the most stressed places, in the front and rear wall portions of the collar 9.
  • the collar 9 is preferably conical and has an oblong section.
  • the collar 9 and at least the upper part of the tubular element 2 are optionally covered by a metal protective casing 10.
  • This metal casing 10 follows the shape of the collar 9. It advantageously covers the relatively hard free lateral edges of the upper part of the tube. These lateral flanges serve as a sliding shoe for the pouring tube in the feeding and tube changing device. Without the presence of the envelope, the side edges, due to the hardness of the ceramic material, would scratch the guide rails and cause early wear.
  • the method of assembling the added plate 4 on the fixing flange 8 does not involve any anchoring part.
  • the fixing flange 8 and the added plate 4 are simply enclosed in a protective metal housing 11.
  • the collar 9 preferably has a conical shape. As illustrated in Figures 1 and 6, the collar 9 is flush with the front and rear edges of the upper face diametrically opposed by relative to the direction of movement of the pouring tube, when changing the tube.
  • the lateral edges of the added plate are not affected by these extra thicknesses and can bear on the feeding and tube changing device, in particular on guide rails arranged in the vicinity of a pouring tube and intended to bring a tube from a vertical standby position next to a tube in the casting position, towards said casting position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Endoscopes (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Furnace Charging Or Discharging (AREA)

Abstract

A reinforced casting tube with a collar (9) around which are formed thicker wall portions than the walls of another cross section of the tubular member. Apart from this thickened ceramic portion, another thickened portion may be provided in the moving direction of the tube so that the tubular member of the tube has an oblong cross section.

Description

La présente invention est relative à un tube de coulée comprenant un élément tubulaire présentant à une extrémité supérieure, une face supérieure parfaitement plane destinée à glisser dans un dispositif d'amenée et de changement de tube ou d'un dispositif de régulation le long de la face inférieure fixe d'une plaque réfractaire de référence ou mobile d'une plaque-tiroir, l'assemblage de l'extrémité supérieure de l'élément tubulaire étant renforcé par un collet et par une enveloppe métallique de protection.The present invention relates to a pouring tube comprising a tubular element having at an upper end, a perfectly flat upper face intended to slide in a device for feeding and changing the tube or a regulating device along the fixed underside of a reference or movable refractory plate of a drawer plate, the assembly of the upper end of the tubular element being reinforced by a collar and by a metal protective casing.

Elle est destinée à la fabrication des tubes de coulée utilisés principalement en sidérurgie, notamment dans les installations de coulée continue. Elle a pour but de renforcer mécaniquement les tubes de coulée. Ces tubes renforcées permettent ainsi de réduire les risques de dommages mécaniques lors des changements de tube au cours d'une même séquence de coulée.It is intended for the production of pouring tubes used mainly in the steel industry, in particular in continuous casting installations. Its purpose is to mechanically reinforce the pouring tubes. These reinforced tubes thus reduce the risk of mechanical damage during tube changes during the same casting sequence.

On connaît par le document WO 89/02800, un tube de coulée pour dispositif de fermeture coulissante formé de deux pièces distinctes réalisées généralement en matériaux céramiques réfractaires différents. La première pièce est une plaque de tube coulissant réalisée en alumine ou en magnésie, présentant une face supérieure parfaitement plane destinée à coulisser le long d'un plan de coulissement, et la seconde pièce est un élément tubulaire cylindrique pourvu d'une bride solidaire de l'élément tubulaire destinée à être immergé dans un moule. La plaque est rapportée à l'élément tubulaire par juxtaposition. La face de serrage du joint entre la plaque rapportée et la bride est plane ou à emboîtement. Il s'agit généralement d'un emboîtement simple. La bride et une partie supérieure de l'élément tubulaire sont recouvertes d'une enveloppe métallique de protection, tandis que la plaque rapportée et le flanc de la bride sont enserrés dans un anneau de frettage. Ce mode de réalisation en deux pièces distinctes dont l'une est une plaque, permet d'usiner la surface de coulissement par rectification. Une surface de coulissement parfaitement lisse permet de réduire au minimum les infiltrations de métal dans le plan de coulissement.Document WO 89/02800 discloses a pouring tube for a sliding closure device formed from two separate parts generally made of different refractory ceramic materials. The first part is a sliding tube plate made of alumina or magnesia, having a perfectly flat upper face intended to slide along a sliding plane, and the second part is a cylindrical tubular element provided with a flange integral with the tubular element intended to be immersed in a mold. The plate is attached to the tubular element by juxtaposition. The clamping face of the seal between the insert plate and the flange is flat or interlocking. It is generally a simple nesting. The flange and an upper part of the tubular element are covered with a protective metal casing, while the attached plate and the flank of the flange are enclosed in a hoop ring. This embodiment in two separate parts, one of which is a plate, makes it possible to machine the sliding surface by grinding. A perfectly smooth sliding surface minimizes metal infiltration into the sliding plane.

L'avantage de ce tube composite réside dans le fait que la réalisation de deux surfaces planes est plus aisée que celle d'une saillie annulaire et d'une rainure complémentaire.The advantage of this composite tube lies in the fact that the production of two flat surfaces is easier than that of an annular projection and a complementary groove.

Selon ce document, une planéité suffisante est obtenue par rectification.According to this document, sufficient flatness is obtained by rectification.

On connaît aussi, par le document FR-A-2241359, un tube de coulée immergé présentant un canal de section elliptique dont la paroi présente une surépaisseur au niveau du grand axe. Cette surépaisseur est constante sur toute la longueur du tube de coulée.Document FR-A-2241359 also discloses a submerged pouring tube having a channel of elliptical section, the wall of which has an increased thickness at the level of the major axis. This additional thickness is constant over the entire length of the pouring tube.

Dans ce document, on décrit le grand risque de rupture de la partie inférieure du tube de coulée au niveau des orifices de décharge latéraux mais non pas au niveau du collet.In this document, the great risk of rupture of the lower part of the pouring tube is described at the level of the lateral discharge orifices but not at the level of the collar.

De même, par le document FR-A-1447139, on connaît un procédé et dispositif pour la coulée directe de métaux pour la production de brames étroites. Il est proposé de former un jet de coulée ovale par l'emploi d'une busette ovale-conique.Similarly, from document FR-A-1447139, there is known a process and device for the direct casting of metals for the production of narrow slabs. It is proposed to form an oval casting jet by the use of an oval-conical nozzle.

La busette ovale-conique présente une section transversale de forme extérieure ovale ainsi qu'un canal de coulée de section intérieure de forme ovale semblable de sorte qu'au niveau d'une même section, l'épaisseur de la paroi est la même dans toutes les directions.The oval-conical nozzle has a cross section of oval external shape as well as a flow channel of internal section of similar oval shape so that at the same section, the thickness of the wall is the same in all directions.

Or, l'expérience montre qu'en raison des sollicitations extrêmes que subit le matériau réfractaire lors du changement du tube, les tubes de coulée sont fragilisées à l'endroit du collet.However, experience shows that due to the extreme stresses that the refractory material undergoes when the tube is changed, the pouring tubes are weakened at the location of the collar.

Partie vulnérable des tubes de coulée connus se situe au niveau du collet. C'est à cet endroit que s'exerce le couple de réaction mécanique lors du changement de tube. La partie plongeante du tube déplacée parallèlement à elle-même de la position d'attente vers la position de service est en effet freinée par la viscosité du bain de métal fondu dans le moule.Vulnerable part of known pouring tubes is located at the level of the collar. This is where the mechanical reaction torque is exerted when changing the tube. The plunging part of the tube moved parallel to itself from the standby position to the service position is in fact held back by the viscosity of the molten metal bath in the mold.

Pour y remédier on a proposé d'augmenter l'épaisseur des tubes de l'élément cylindrique, mais les contingences des dispositifs d'amenée et d'échange des tubes de coulée, le poids excessif des tubes et le peu d'espace disponible sous le conteneur métallurgique empêchent d'avoir des épaisseurs plus importantes.To remedy this, it has been proposed to increase the thickness of the tubes of the cylindrical element, but the contingencies of the devices for feeding and exchanging the pouring tubes, the excessive weight of the tubes and the little space available under the metallurgical container prevents having greater thicknesses.

La présente invention vise à résoudre ce problème et propose un tube tel que décrit dans le premier paragraphe du présent mémoire.The present invention aims to solve this problem and provides a tube as described in the first paragraph of this specification.

La solution suivant l'invention consiste à renforcer l'épaisseur du tube non pas sur tout le pourtour et toute la longueur de l'élément tubulaire, mais uniquement aux endroits les plus sollicités.The solution according to the invention consists in reinforcing the thickness of the tube not over the entire periphery and the entire length of the tubular element, but only in the most stressed places.

Dans ce but, le présent tube présente au niveau du collet et plus particulièrement dans les portions de parois orientées dans la direction de déplacement du tube, afin de réduire les risques de rupture du tube, au niveau du collet, une surépaisseur de matériau céramique par rapport à l'épaisseur de matière au niveau d'une autre section transversale de l'élément tubulaire.For this purpose, the present tube has at the collar and more particularly in the portions of walls oriented in the direction of movement of the tube, in order to reduce the risks of tube rupture, at the collar, an excess thickness of ceramic material by compared to the thickness of material at another cross section of the tubular element.

Le collet est conique et de section transversale oblongue.The collar is conical and of oblong cross section.

Dans la forme de réalisation proposée, le collet affleure les rebords avant et arrière de la face supérieure, tandis qu'il se trouve en retrait des rebords latéraux de ladite face supérieure. De ce fait, les rebords latéraux sont libres et peuvent prendre appui sur le dispositif mécanique de changement de tube.In the proposed embodiment, the collar is flush with the front and rear edges of the upper face, while it is set back from the lateral edges of said upper face. Therefore, the side flanges are free and can bear on the mechanical tube changing device.

La forme oblongue du collet dans la direction de déplacement contribue à renforcer sa résistance mécanique à la poussée exercée par la tige lors de changement de tube de coulée.The oblong shape of the collar in the direction of movement contributes to reinforcing its mechanical resistance to the thrust exerted by the rod when changing the pouring tube.

La section oblongue sert à augmenter le moment d'inertie et de diminuer par ce fait le risque de rupture.The oblong section serves to increase the moment of inertia and thereby reduce the risk of rupture.

Lorsque l'élément tubulaire comporte, faisant corps avec lui, une bride d'ancrage destinée à fixer une plaque rapportée, réalisée en un matériau réfractaire différent de l'élément tubulaire et soumise à une rectification afin de mieux être adaptée à coulisser contre la plaque de référence, le collet de renforcement fait corps avec ladite bride d'ancrage.When the tubular element comprises, integral with it, an anchoring flange intended to fix an added plate, made of a refractory material different from the tubular element and subjected to a rectification in order to be better adapted to slide against the plate reference, the reinforcing collar is integral with said anchoring flange.

De même, lorsque la plaque rapportée et l'élément tubulaire sont d'une seule pièce, le collet fait corps avec ceux-ci.Similarly, when the insert plate and the tubular element are in one piece, the collar is integral with them.

Les particularités et détails de l'invention, ainsi que d'autres caractéristiques apparaîtront au cours de la description détaillée suivante d'une forme de réalisation particulière du tube de coulée suivant l'invention, donnée à titre illustratif et non limitatif.The features and details of the invention, as well as other characteristics will become apparent during the following detailed description of a particular embodiment of the pouring tube according to the invention, given by way of illustration and not limitation.

Cette description se réfère aux dessins ci-joints, dans lesquels :

  • la figure 1 est une vue en coupe longitudinale d'un tube de coulée selon l'invention;
  • la figure 2 est une vue en plan d'une plaque réfractaire rapportée au tube;
  • la figure 3 est une vue en coupe transversale du tube de coulée montré dans la figure 1;
  • la figure 4 est une vue de dessous du tube de coulée montré dans les figures 1 et 3;
  • la figure 5 est une vue en coupe longitudinale d'une seconde forme de réalisation d'un tube de coulée selon l'invention; et
  • la figure 6 est une vue en coupe transversale du tube montré dans la figure 5.
This description refers to the attached drawings, in which:
  • Figure 1 is a longitudinal sectional view of a pouring tube according to the invention;
  • Figure 2 is a plan view of a refractory plate attached to the tube;
  • Figure 3 is a cross-sectional view of the pouring tube shown in Figure 1;
  • Figure 4 is a bottom view of the pouring tube shown in Figures 1 and 3;
  • Figure 5 is a longitudinal sectional view of a second embodiment of a pouring tube according to the invention; and
  • FIG. 6 is a cross-sectional view of the tube shown in FIG. 5.

Dans ces figures, les mêmes signes de référence désignent des éléments identiques ou analogues.In these figures, the same reference signs designate identical or analogous elements.

Comme illustré dans la figure 1, un tube de coulée 1 est formé d'un élément tubulaire 2 présentant un canal central interne 3 de section constante et d'une plaque rapportée 4 de section rectangulaire.As illustrated in FIG. 1, a pouring tube 1 is formed of a tubular element 2 having an internal central channel 3 of constant section and of an attached plate 4 of rectangular section.

L'élément tubulaire 2 est généralement réalisé en un matériau réfractaire résistant à l'érosion.The tubular element 2 is generally made of a refractory material resistant to erosion.

Le corps de l'élément tubulaire 2 peut comporter un insert 5 en oxyde de zirconium destiné a protéger au moins une partie de la paroi extérieure du tube de l'action érosive conjuguée de l'acier et de l'air à l'endroit du niveau d'acier dans le moule. L'extrémité inférieure de l'élément tubulaire 2 présente des orifices latéraux 6, 7 qui débouchent dans la direction de déplacement du tube de façon diamétralement opposée. Ces orifices sont destinés à défléchir le jet de coulée et atténuer l'action érosive des remous. (Fig.1)The body of the tubular element 2 may include an insert 5 of zirconium oxide intended to protect at least part of the external wall of the tube from the combined erosive action of steel and air at the location of the steel level in the mold. The lower end of the tubular element 2 has lateral orifices 6, 7 which open in the direction of movement of the tube in a diametrically opposite manner. These orifices are intended to deflect the pouring jet and attenuate the erosive action of the eddies. (Fig. 1)

L'extrémité supérieure de l'élément tubulaire 2 porte une face supérieure parfaitement plane faisant partie intégrante de l'élément tubulaire 2. Le bord de la face supérieure et sa jonction avec l'extrémité supérieure de l'élément tubulaire 2 du tube sont renforcés par un collet 9 présentant du côté des portions de parois dirigées dans le sens de déplacement du tube 1, une surépaisseur de matériau céramique, de manière à présenter une section oblongue. (Fig.4)The upper end of the tubular element 2 carries a perfectly flat upper face forming an integral part of the tubular element 2. The edge of the upper face and its junction with the upper end of the tubular element 2 of the tube are reinforced. by a collar 9 having on the side portions of walls directed in the direction of movement of the tube 1, an excess thickness of ceramic material, so as to have an oblong section. (Fig. 4)

L'extrémité supérieure de l'élément tubulaire a la même composition que l'élément tubulaire 2 et forme avec celui-ci une même et seule pièce ou entité. Elle peut présenter, soit une surface à emboîtement simple (Fig.1 et 3), soit une surface plane (Fig.5 et 6). La première forme est apte à recevoir une plaque rapportée 4. La face supérieure de la plaque est strictement plane pour assurer l'étanchéité du tube 1 contre le plan de glissement de la plaque de référence non montrée, de manière à éviter toute aspiration d'air atmosphérique ambiant. Ceci permet d'empêcher la formation d'oxydes divers et de bulles dans la masse de métal, nuisant considérablement à la qualité du produit final.The upper end of the tubular element has the same composition as the tubular element 2 and forms therewith the same single piece or entity. It can have either a simple interlocking surface (Fig. 1 and 3) or a flat surface (Fig. 5 and 6). The first form is suitable for receiving an added plate 4. The upper face of the plate is strictly flat to ensure the tightness of the tube 1 against the sliding plane of the plate. reference not shown, so as to avoid any aspiration of ambient atmospheric air. This makes it possible to prevent the formation of various oxides and bubbles in the mass of metal, considerably reducing the quality of the final product.

La présente invention propose de renforcer l'épaisseur du tube de coulée uniquement aux endroits les plus sollicités, dans les portions de parois avant et arrière du collet 9. Le collet 9 est de préférence conique et a une section oblongue.The present invention proposes to reinforce the thickness of the pouring tube only in the most stressed places, in the front and rear wall portions of the collar 9. The collar 9 is preferably conical and has an oblong section.

Le collet 9 et au moins la partie supérieure de l'élément tubulaire 2 sont éventuellement recouverts par une enveloppe métallique 10 de protection. Cette enveloppe métallique 10 épouse la forme du collet 9. Elle recouvre avantageusement les rebords latéraux libres relativement durs de la partie supérieure du tube. Ces rebords latéraux servent de patin de coulissement du tube de coulée dans le dispositif d'amenée et de changement de tubes. Sans la présence de l'enveloppe, les rebords latéraux, en raison de la dureté du matériau céramique rayeraient les rails de guidage et provoqueraient une usure précoce.The collar 9 and at least the upper part of the tubular element 2 are optionally covered by a metal protective casing 10. This metal casing 10 follows the shape of the collar 9. It advantageously covers the relatively hard free lateral edges of the upper part of the tube. These lateral flanges serve as a sliding shoe for the pouring tube in the feeding and tube changing device. Without the presence of the envelope, the side edges, due to the hardness of the ceramic material, would scratch the guide rails and cause early wear.

Le mode d'assemblage de la plaque rapportée 4 sur la bride de fixation 8 ne fait intervenir aucune pièce d'ancrage. La bride de fixation 8 et la plaque rapportée 4 sont simplement enserrées dans un boîtier métallique de protection 11.The method of assembling the added plate 4 on the fixing flange 8 does not involve any anchoring part. The fixing flange 8 and the added plate 4 are simply enclosed in a protective metal housing 11.

Le collet 9 présente de préférence une forme conique. Comme illustré dans les figures 1 et 6, le collet 9 affleure les rebords avant et arrière de la face supérieure diamétralement opposés par rapport à la direction de déplacement du tube de coulée, lors du changement de tube.The collar 9 preferably has a conical shape. As illustrated in Figures 1 and 6, the collar 9 is flush with the front and rear edges of the upper face diametrically opposed by relative to the direction of movement of the pouring tube, when changing the tube.

Les rebords latéraux de la plaque rapportée ne sont pas affectés par ces surépaisseurs et peuvent prendre appui sur le dispositif d'amenée et de changement de tube, en particulier sur des rails-guides disposés au voisinage d'un tube de coulée et destinés à amener un tube depuis une position verticale d'attente à côté d'un tube en position de coulée, vers ladite position de coulée.The lateral edges of the added plate are not affected by these extra thicknesses and can bear on the feeding and tube changing device, in particular on guide rails arranged in the vicinity of a pouring tube and intended to bring a tube from a vertical standby position next to a tube in the casting position, towards said casting position.

Claims (4)

  1. Casting tube comprising a tubular element (2) having at an upper end a perfectly flat upper face intended to slide in a device for feeding and changing the tube or a regulating device along the fixed lower face of a reference or movable refractory plate of a valve plate, the assembly of the upper end of the tube (1) being reinforced by a collar (9) and by a protective metallic covering (10), characterized in that the tube has at the level of the collar an over-thickness of ceramic material in relation to the material thickness in the vicinity of another transverse section of the tubular element, and in that the collar of the tube has at the same time a conical shape and an oblong transverse section.
  2. Casting tube according to Claim 1, characterized in that the casting tube has at the level of the collar (9), in the wall portions facing in the direction of displacement of the tube, an over-thickness of ceramic material in relation to the material thickness at the level of a lateral wall portion of the tubular element.
  3. Casting tube according to Claim 1 or 2, characterized in that the collar (9) is flush with the front and rear edges of the upper face, and in that it is set back from the lateral edges of the attached plate which are intended to bear on the device for feeding and changing the tube.
  4. Casting tube according to any one of the preceding claims, characterized in that the collar (9) has on the same side as the diametrically opposed wall portions, in the direction of displacement of the tube, over-thicknesses which reinforce the fixing of a tubular element (2) to a fixing flange (8) of refractory material.
EP94903708A 1993-02-10 1994-01-14 Casting tube Expired - Lifetime EP0683706B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE9300123 1993-02-10
BE9300123A BE1006726A3 (en) 1993-02-10 1993-02-10 Tube casting.
PCT/BE1994/000004 WO1994017937A1 (en) 1993-02-10 1994-01-14 Casting tube

Publications (2)

Publication Number Publication Date
EP0683706A1 EP0683706A1 (en) 1995-11-29
EP0683706B1 true EP0683706B1 (en) 1997-02-19

Family

ID=3886839

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94903708A Expired - Lifetime EP0683706B1 (en) 1993-02-10 1994-01-14 Casting tube

Country Status (9)

Country Link
EP (1) EP0683706B1 (en)
AT (1) ATE149006T1 (en)
AU (1) AU5806594A (en)
BE (1) BE1006726A3 (en)
DE (1) DE69401773T2 (en)
ES (1) ES2098914T3 (en)
MX (1) MX9401023A (en)
WO (1) WO1994017937A1 (en)
ZA (1) ZA94884B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6016941A (en) * 1998-04-14 2000-01-25 Ltv Steel Company, Inc. Submerged entry nozzle
MX2015002196A (en) * 2012-09-11 2015-05-08 Refractory Intellectual Prop Refractory pouring device.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1447139A (en) * 1964-02-03 1966-07-29 Hagenburger Chamotte Ton Method and device for the direct casting of metals and their various applications
ATA415774A (en) * 1973-08-24 1976-04-15 Kloeckner Werke Ag CASTING PIPE FOR CONTINUOUS CASTING PLANTS
BE1000948A3 (en) * 1987-10-02 1989-05-23 Internat Ind Engineering Sprl Tube casting for closure device sliding.

Also Published As

Publication number Publication date
AU5806594A (en) 1994-08-29
MX9401023A (en) 1994-08-31
ATE149006T1 (en) 1997-03-15
EP0683706A1 (en) 1995-11-29
DE69401773T2 (en) 1997-07-10
ES2098914T3 (en) 1997-05-01
ZA94884B (en) 1994-08-23
DE69401773D1 (en) 1997-03-27
BE1006726A3 (en) 1994-11-29
WO1994017937A1 (en) 1994-08-18

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