EP0582496B1 - Internal pouring tube made from refractory material for metallurgical vessels - Google Patents

Internal pouring tube made from refractory material for metallurgical vessels Download PDF

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Publication number
EP0582496B1
EP0582496B1 EP93401761A EP93401761A EP0582496B1 EP 0582496 B1 EP0582496 B1 EP 0582496B1 EP 93401761 A EP93401761 A EP 93401761A EP 93401761 A EP93401761 A EP 93401761A EP 0582496 B1 EP0582496 B1 EP 0582496B1
Authority
EP
European Patent Office
Prior art keywords
pouring tube
casting
internal
shoulder
nozzle
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 - Lifetime
Application number
EP93401761A
Other languages
German (de)
French (fr)
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EP0582496A1 (en
Inventor
Patrick Tassot
Bernard Debiesme
Marcel Rauner
Pierre Lerouge
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sollac SA
Original Assignee
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
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Publication date
Application filed by Sollac SA, Lorraine de Laminage Continu SA SOLLAC filed Critical Sollac SA
Publication of EP0582496A1 publication Critical patent/EP0582496A1/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
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Continuous Casting (AREA)

Abstract

The subject of the present invention is an internal pouring tube (nozzle) (10) made from refractory material for metallurgical vessels (1) for the bottom casting of metal, including a base wall (2, 3) intended to receive the said pouring tube (10) and being fitted (lined) with a nozzle seating block. This internal pouring tube (10) is formed from a vertical body (11) delimiting a runner (casting channel) (12) and equipped at its upper part with a shoulder (13) forming the nozzle seating block and the lower part (14) of which constitutes a reference plate under which bears a casting (pouring) tube (5) which is interchangeable during casting. <IMAGE>

Description

L'invention a pour objet une busette interne en matériau réfractaire pour récipients métallurgiques de coulée par le bas.The subject of the invention is an internal nozzle made of refractory material for metallurgical vessels for casting from below.

Les récipients métallurgiques de coulée vers le bas comme par exemple les répartiteurs de coulée continue éventuellement obturés à l'aide d'une quenouille comportent une paroi de fond munie généralement d'une brique de siège dans laquelle est logée une busette interne.Metallurgical vessels for downward casting, such as, for example, continuous casting distributors, possibly closed with a stopper, have a bottom wall generally provided with a seat brick in which an internal nozzle is housed.

Cette busette interne délimite un canal de coulée par lequel l'acier en fusion contenu dans le récipient s'écoule de façon continue dans une lingotière à l'aide d'un tube de coulée.This internal nozzle delimits a pouring channel through which the molten steel contained in the container flows continuously in an ingot mold using a pouring tube.

Jusqu'à présent, l'extrémité extérieure de la busette interne est logée dans une plaque fixe de référence.So far, the outer end of the internal nozzle is housed in a fixed reference plate.

Le tube de coulée comporte une bride supérieure en matériau réfractaire et est amené à coulisser sous l'action d'un double vérin pneumatique le long de la plaque de référence, de manière à glisser le long de celle-ci depuis une position de chargement vers une position de service ou d'obturation dans l'axe du canal de coulée du récipient et de la position de service vers une position de dégagement, de manière à permettre l'échange du tube de coulée sans soulever le récipient.The pouring tube has an upper flange of refractory material and is caused to slide under the action of a double pneumatic cylinder along the reference plate, so as to slide along it from a loading position towards a service or closing position in the axis of the pouring channel of the container and the service position to a release position, so as to allow the exchange of the pouring tube without lifting the container.

Les surfaces de contact entre, d'une part, le tube de coulée et la plaque de référence et, d'autre part, l'extrémité inférieure de la busette interne et cette plaque de référence, constituent des passages possibles pour l'air ambiant ou l'acier en cas de défaut d'étanchéité.The contact surfaces between, on the one hand, the pouring tube and the reference plate and, on the other hand, the lower end of the internal nozzle and this reference plate, constitute possible passages for the ambient air. or steel in the event of a leak.

En effet, ces zones sont soumises à une dépression importante créée dans le canal de coulée par le jet de métal s'écoulant dans ledit canal.Indeed, these areas are subjected to a significant depression created in the pouring channel by the metal jet flowing in said channel.

Jusqu'à présent, diverses solutions ont été mises en oeuvre pour empêcher l'entrée d'air dans le canal de coulée entre la surface de contact du tube de coulée et la plaque de référence, en prévoyant au niveau de cette surface une ceinture annulaire de gaz inerte de façon à isoler le métal en fusion de l'air ambiant par une barrière de protection gazeuse continue qui est cependant assez coûteuse en raison de la consommation importante de gaz.Until now, various solutions have been implemented to prevent the entry of air into the pouring channel between the contact surface of the pouring tube and the reference plate, by providing an annular belt at this surface. inert gas so as to isolate the molten metal from the ambient air by a continuous gaseous protection barrier which is however quite expensive due to the high consumption of gas.

Mais, le problème de l'étanchéité au niveau de la surface de contact entre la busette interne et la plaque de référence n'a pas été résolu de manière efficace.However, the problem of sealing at the level of the contact surface between the internal nozzle and the reference plate has not been effectively resolved.

Par ailleurs, la busette interne est jusqu'à présent introduite dans le récipient métallurgique par le bas ce qui pose un problème pour le maintien de cette busette.Furthermore, the internal nozzle has so far been introduced into the metallurgical container from below, which poses a problem for the maintenance of this nozzle.

En effet, lorsque la quenouille est appliquée sur la surface supérieure de la busette interne, celle-ci a tendance à se désolidariser du fond du récipient métallurgique ce qui peut provoquer une détérioration du dispositif d'amenée et d'échange du tube coulée.In fact, when the stopper rod is applied to the upper surface of the internal nozzle, the latter tends to separate from the bottom of the metallurgical container, which can cause deterioration of the device for supplying and exchanging the poured tube.

La présente invention vise à remédier à ces inconvénients en proposant une busette interne dont la conception permet d'améliorer son maintien dans le fond du récipient métallurgique et de réduire les zones d'infiltration d'air dans le canal de coulée.The present invention aims to remedy these drawbacks by proposing an internal nozzle whose design makes it possible to improve its retention in the bottom of the metallurgical container and to reduce the areas of air infiltration in the pouring channel.

La présente invention a donc pour objet une busette interne en matériau réfractaire pour récipients métallurgiques de coulée de métal par le bas, comportant une paroi de fond destinée à recevoir ladite busette et étant garnie d'une brique de siège, caractérisée en ce qu'elle est formée par un corps vertical délimitant un canal de coulée et muni à sa partie supérieure d'un épaulement formant la brique de siège et dont la partie inférieure constitue une plaque de référence sous laquelle s'appuie un tube de coulée interchangeable en cours de coulée.The present invention therefore relates to an internal nozzle made of refractory material for metallurgical containers for casting metal from below, comprising a bottom wall intended to receive said nozzle and being lined with a seat brick, characterized in that it is formed by a vertical body delimiting a pouring channel and provided at its upper part with a shoulder forming the seat brick and the lower part of which constitutes a reference plate under which an interchangeable pouring tube rests during casting.

Selon d'autres caractéristiques de l'invention :

  • l'épaulement est tronconique,
  • l'épaulement tronconique est évasé vers le haut, et
  • la surface supérieure de l'épaulement du corps vertical est inclinée vers le canal de coulée.
According to other characteristics of the invention:
  • the shoulder is frustoconical,
  • the frustoconical shoulder is flared upwards, and
  • the upper surface of the shoulder of the vertical body is inclined towards the runner.

L'entrée du canal de coulée présente un bord intérieur arrondi.The entrance to the sprue has a rounded inside edge.

D'autre part le corps vertical comporte des moyens de diffusion d'un gaz inerte dans la canal de coulée.On the other hand, the vertical body comprises means for diffusing an inert gas in the pouring channel.

Ces moyens de diffusion du gaz inerte peuvent être formés par une bague cylindrique en matériau poreux disposée dans une gorge ménagée dans le corps vertical et dont la paroi interne constitue une portion de longueur dudit canal de coulée, ladite gorge communiquant avec au moins une arrivée du gaz neutre.These means for diffusing the inert gas can be formed by a cylindrical ring of porous material disposed in a groove formed in the vertical body and the internal wall of which constitutes a length portion of said pouring channel, said groove communicating with at least one inlet of the neutral gas.

Selon une variante, les moyens de diffusion du gaz inerte peuvent être formés par une bague cylindrique en matériau dense munie de fentes verticales et disposée dans une gorge ménagée dans le corps vertical, la paroi interne de ladite bague constituant une portion de longueur dudit canal de coulée et ladite gorge communiquant avec au moins une arrivée du gaz inerte.Alternatively, the means for diffusing the inert gas can be formed by a cylindrical ring of dense material provided with vertical slots and disposed in a groove formed in the vertical body, the internal wall of said ring constituting a length portion of said channel. casting and said groove communicating with at least one inlet of the inert gas.

L'invention sera mieux comprise à l'aide de la description qui va suivre donnée uniquement à titre d'exemple en se référant au dessin unique annexé qui représente une vue en coupe verticale d'une busette interne selon l'invention, mise en place dans un récipient métallurgique.The invention will be better understood with the aid of the description which follows, given solely by way of example with reference to the single appended drawing which represents a view in vertical section of an internal nozzle according to the invention, put in place in a metallurgical container.

Sur la figure 1, on a représenté une partie du fond d'un récipient métallurgique de coulée par le bas désigné dans son ensemble par la référence 1.In Figure 1, there is shown a part from the bottom of a metallurgical container for bottom pouring designated as a whole by the reference 1.

La paroi de fond 2 est recouverte d'un revêtement interne 3 en matériau réfractaire.The bottom wall 2 is covered with an internal coating 3 of refractory material.

Le fond du récipient métallurgique 1 comporte un trou de coulée 4 dans lequel est placée une busette interne 10 en matériau réfractaire.The bottom of the metallurgical container 1 has a tap hole 4 in which is placed an internal nozzle 10 made of refractory material.

La busette interne 10 est formée par un corps vertical 11 délimitant un canal de coulée 12 de l'acier liquide contenu dans le récipient 1.The internal nozzle 10 is formed by a vertical body 11 delimiting a pouring channel 12 of the liquid steel contained in the container 1.

Ce corps vertical 11 est muni à sa partie supérieure d'un épaulement 13 formant la brique de siège qui est habituellement maçonnée dans le revêtement réfractaire 3 et dans laquelle est logée la busette interne.This vertical body 11 is provided at its upper part with a shoulder 13 forming the seat brick which is usually built in the refractory lining 3 and in which is housed the internal nozzle.

La partie inférieure 14 de ce corps vertical 11 constitue une plaque de référence sous laquelle vient s'appuyer un tube de coulée 5 du métal en fusion dans une lingotière de coulée non représentée.The lower part 14 of this vertical body 11 constitutes a reference plate under which is supported a pouring tube 5 of the molten metal in a casting mold not shown.

La busette interne 10 comprenant l'épaulement 13 et la partie inférieure 14 constitue un ensemble monolithique.The internal nozzle 10 comprising the shoulder 13 and the lower part 14 constitutes a monolithic assembly.

L'épaulement 13 est tronconique, de préférence évasé vers le haut, c'est à dire vers l'intérieur du récipient métallurgique 1.The shoulder 13 is frustoconical, preferably flared upwards, that is to say towards the inside of the metallurgical container 1.

La surface supérieure 15 de l'épaulement 13 est inclinée vers le canal de coulée 12 et l'entrée dudit canal de coulée 12 présente un bord intérieur 16 arrondi qui forme un siège pour une quenouille non représentée.The upper surface 15 of the shoulder 13 is inclined towards the runner 12 and the inlet of said runner 12 has a rounded inner edge 16 which forms a seat for a stopper rod not shown.

D'autre part, le corps vertical 11 de la busette interne 10 comporte des moyens de diffusion d'un gaz inerte, comme par exemple de l'argon, dans le canal de coulée 12 pour réaliser le bullage d'argon le long de la paroi intérieure dudit canal de coulée.On the other hand, the vertical body 11 of the internal nozzle 10 comprises means for diffusing an inert gas, such as for example argon, into the pouring channel 12 to carry out the bubbling of argon along the inner wall of said runner.

Ces moyens de diffusion du gaz inerte sont formés par une bague cylindrique 17 en matériau poreux disposée dans une gorge 18 ménagée dans le corps vertical 11. La paroi interne de la bague cylindrique 17 constitue une portion de longueur du canal de coulée 12 et la gorge 18 est reliée à au moins une arrivée 19 du gaz inerte.These inert gas diffusion means are formed by a cylindrical ring 17 of porous material arranged in a groove 18 formed in the vertical body 11. The internal wall of the cylindrical ring 17 constitutes a length portion of the pouring channel 12 and the groove 18 is connected to at least one inlet 19 of inert gas.

Du fait de la porosité du matériau constituant la bague 17, le gaz inerte traverse ladite bague et pénètre dans la canal de coulée 12.Due to the porosity of the material constituting the ring 17, the inert gas passes through said ring and enters the pouring channel 12.

Les moyens de diffusion du gaz inerte peuvent également être constitués par un anneau ou un tore en matériau poreux.The means for diffusing the inert gas can also consist of a ring or a torus of porous material.

Le tube de coulée 5 est supporté par un dispositif d'amenée et d'échange dudit tube et désigné dans son ensemble par la référence 20.The pouring tube 5 is supported by a supply and exchange device for said tube and designated as a whole by the reference 20.

Selon une variante, les moyens de diffusion du gaz inerte peuvent être constitués par une bague cylindrique en matériau dense munie de fentes verticales et disposée dans la gorge 18 ménagée dans le corps vertical 11. La paroi interne de cette bague constitue également une portion de longueur du canal de coulée 11 et la gorge 18 communique avec au moins une arrivée 11 du gaz inerte.According to a variant, the means for diffusing the inert gas can consist of a cylindrical ring of dense material provided with vertical slots and disposed in the groove 18 formed in the vertical body 11. The internal wall of this ring also constitutes a portion of length of the runner 11 and the groove 18 communicates with at least one inlet 11 for the inert gas.

Le tube de coulée 5 est appliqué élastiquement à l'aide de guides 6 contre la partie inférieure 14 de la busette interne 10 qui constitue une plaque de référence.The pouring tube 5 is applied elastically using guides 6 against the lower part 14 of the internal nozzle 10 which constitutes a reference plate.

La busette interne 10 est introduite dans le récipient métallurgique 1 par le haut.The internal nozzle 10 is introduced into the metallurgical container 1 from the top.

La construction monolithique de la busette interne 10 présente de nombreux avantages.The monolithic construction of the internal nozzle 10 has many advantages.

La plaque de référence formée par la partie inférieure de la busette sert de plaque supérieure au dispositif d'amenée et d'échange du tube de coulée.The reference plate formed by the lower part of the nozzle serves as an upper plate for the supply and exchange device for the pouring tube.

En effet, cette construction permet d'améliorer la solidité du corps vertical de la busette interne de façon que cette busette résiste mieux aux sollicitations thermiques et aux chocs mécaniques, notamment lors de l'application de la quenouille.Indeed, this construction improves the solidity of the vertical body of the internal nozzle. so that this nozzle better withstands thermal stresses and mechanical shocks, in particular during the application of the stopper rod.

D'autre part, lors de l'application de la quenouille, la busette interne a tendance à se coincer dans le revêtement réfractaire du récipient métallurgique du fait de la forme tronconique évasée vers le haut de l'épaulement 13 ce qui évite la détérioration du dispositif d'amenée et d'échange du tube de coulée.On the other hand, during the application of the stopper rod, the internal nozzle tends to get stuck in the refractory lining of the metallurgical container due to the frustoconical shape flared towards the top of the shoulder 13 which prevents deterioration of the device for supplying and exchanging the pouring tube.

Enfin, la busette selon la présente invention permet de limiter au maximum le nombre de joints et de passages possibles pour l'air ambiant et le métal en fusion. Ainsi, la propreté du métal et la fiabilité du système sont améliorées et les usures aléatoires des pièces réfractaires sont diminuées.Finally, the nozzle according to the present invention makes it possible to limit the number of joints and possible passages for the ambient air and the molten metal as much as possible. Thus, the cleanliness of the metal and the reliability of the system are improved and the random wear of the refractory parts is reduced.

Claims (4)

  1. An internal pouring tube made of a refractory material for metallurgical vessels for casting through the bottom, comprising a bottom side (2) intended to receive the said pouring tube (10) and being provided with a seating block, characterized in that it is formed by a vertical body (11) delimiting a runner (12), and provided at its upper portion with a shoulder (13) forming the seating block, and whose lower portion (14) constitutes a reference plate under which a casting tube (5) is supported that is interchangeable in the course of the casting operation.
  2. An internal pouring tube according to claim 1, characterized in that the shoulder (13) is frustoconical.
  3. An internal pouring tube according to claim 1, characterized in that the frustoconical shoulder (13) flares towards the top.
  4. An internal pouring tube according to claim 1, characterized in that the upper surface (15) of the shoulder (13) of the vertical body (11) is inclined towards the runner (12).
EP93401761A 1992-07-29 1993-07-06 Internal pouring tube made from refractory material for metallurgical vessels Expired - Lifetime EP0582496B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9209403A FR2694221B1 (en) 1992-07-29 1992-07-29 Internal nozzle in refractory material for metallurgical vessels.
FR9209403 1992-07-29

Publications (2)

Publication Number Publication Date
EP0582496A1 EP0582496A1 (en) 1994-02-09
EP0582496B1 true EP0582496B1 (en) 1995-11-08

Family

ID=9432420

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93401761A Expired - Lifetime EP0582496B1 (en) 1992-07-29 1993-07-06 Internal pouring tube made from refractory material for metallurgical vessels

Country Status (5)

Country Link
EP (1) EP0582496B1 (en)
AT (1) ATE129940T1 (en)
DE (1) DE69300761T2 (en)
ES (1) ES2082607T3 (en)
FR (1) FR2694221B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107470570A (en) * 2017-07-19 2017-12-15 重庆市翔聪机械制造有限公司 A kind of flywheel casting mould

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB968693A (en) * 1961-01-30 1964-09-02 Thomas Marshall & Company Loxl Refractory nozzle for the teeming of molten metal
DE1911145U (en) * 1964-12-23 1965-03-04 Stoecker & Kunz G M B H SPOUT FOR POURS, INTERMEDIATE RESERVOIRS AND THE LIKE.
US3752372A (en) * 1971-04-20 1973-08-14 Southwire Co Clay-graphite spout
BE893168A (en) * 1982-05-13 1982-11-16 Vesuvius Internat Corp PROTECTION GAS INJECTION HOSE IN A CAST TUBE
WO1984002670A1 (en) * 1983-01-03 1984-07-19 Vesuvius Crucible Co Flow control nozzle for continuous casting
WO1992000821A1 (en) * 1990-07-04 1992-01-23 International Industrial Engineering S.A. Improved pouring tube insertion and replacement device

Also Published As

Publication number Publication date
EP0582496A1 (en) 1994-02-09
ES2082607T3 (en) 1996-03-16
ATE129940T1 (en) 1995-11-15
FR2694221A1 (en) 1994-02-04
DE69300761T2 (en) 1996-04-04
DE69300761D1 (en) 1995-12-14
FR2694221B1 (en) 1994-10-21

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