EP0282824A2 - Device for emptying metallurgical vessels - Google Patents

Device for emptying metallurgical vessels Download PDF

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Publication number
EP0282824A2
EP0282824A2 EP88103223A EP88103223A EP0282824A2 EP 0282824 A2 EP0282824 A2 EP 0282824A2 EP 88103223 A EP88103223 A EP 88103223A EP 88103223 A EP88103223 A EP 88103223A EP 0282824 A2 EP0282824 A2 EP 0282824A2
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Prior art keywords
metal
taphole
segments
gas
tap hole
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EP88103223A
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German (de)
French (fr)
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EP0282824A3 (en
Inventor
Francis Meyer
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Arcelor Luxembourg SA
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Arbed SA
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Publication of EP0282824A2 publication Critical patent/EP0282824A2/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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4653—Tapholes; Opening or plugging thereof

Definitions

  • the present invention relates to a device for emptying metallurgical vessels, in particular steelworks converters, containing metal and slag.
  • gas-permeable elements around the taphole, comprising elongated segments having a rectangular section and provided on the cold side with a gas distribution chamber.
  • These permeable elements are preferably two or four in number and located around the taphole at a distance of about 0.5 m from the axis.
  • the continuous bubbling of gas on the surface of the metal expels the slag, but only above the permeable elements and the slag may nevertheless reach the taphole by flowing between the slag-free areas above the permeable elements .
  • the object of the present invention is to remedy these drawbacks, and to effectively limit the quantities of slag entrained by the vortex which forms above the taphole.
  • the bubbling agent is usefully a neutral gas such as argon, nitrogen or possibly carbon dioxide.
  • gases used serve at the same time as washing gases favoring the ascent of the inclusions of impurities, suspended in the metal, towards the surface.
  • the casting lathe and the segments are directly adjacent, the dimensions are tolerable and the assembly is easy; moreover, the gases having a cooling effect on the walls of the taphole, their wear is delayed.
  • Fig.1 there is a tap hole 1 housed in the lining 2 of a converter in the drain position. To avoid any premature flow of slag and metal during tilting, the tap hole 1 was previously closed with a wooden plug. After tilting, this plug burns quickly and is pushed out of the tap hole 1, freeing the passage to steel 3. Eight elements permeable to a bubbling agent are located around the tap hole 1. It is essential that a first series of permeable elements 4 is adjacent to the stone comprising the hole which gives way to the steel. There is also shown a second series of permeable elements 5 which can be separated by a few tens of centimeters from the first series; the optimal separation distance, the number and size of these elements, their minimum degree of permeability etc. are determined for each converter by routine testing.
  • the different permeable elements are each provided on the cold side with a distribution chamber (not shown) from which a duct 7 leads, leading to valves for regulating the gas flow rate.
  • a distribution chamber (not shown) from which a duct 7 leads, leading to valves for regulating the gas flow rate.
  • the bodies of the permeable elements 4.5 do not cross the entire thickness of the coating 2; for the same reason the conduits 7 have baffles (not shown) capable of ensuring the freezing of the steel.
  • the total amount of gas injected is average. It is mainly done by the elements 4, adjacent to the taphole, so as to have a given quantity of gas entrained by the flow of metal flowing from the container; it is this gas which influences the wear profile of the inlet and the wall of the tap hole.
  • the remaining quantity of gas leaving the elements forms a curtain 8 of bubbling agent around the hole and rises to the surface where it creates a circular area 9. This range is free of slag, so that the steel can flow without being loaded with inclusions.
  • a gas flow of ca. two m3 / hour ensures the permeability of a refractory element.
  • the flow is increased up to ten m3 / hour to reach twenty m3 / hour towards the end of the casting.
  • exaggerated gas flows towards the end of the casting cause metal and slag splashes which are not favorable for a clean casting.
  • Fig. 2 shows a variant, in which the second series of permeable elements 25 is separated by a minimum distance from the first series 4.
  • Such an execution may be imposed by constraints coming from constructive details of the coating 2. It must also be chosen, when the permeability of the refractory elements 4 is not sufficient to effectively counteract the creation of the vortex.
  • a tap hole is usually made up of several superimposed ferrules with cylindrical orifices.
  • the upper shell a configuration in the form of an inlet funnel (see reference 21).
  • a conical taphole (see reference 22) is obtained which optimally adapts to the pouring jet; the steps between the ferrules of different diameter are quickly eliminated during the first pouring.
  • Fig. 3 shows details of a tap hole 1 surrounded by a series of four permeable elements 4.
  • Each of the four permeable elements is constituted by two neighboring segments of refractory material 31, 35, surrounded by a metal box 32.
  • a distribution chamber (not visible) is welded to the walls of this box. Most of the gas is passed at the interface of the segments.
  • One of the adjacent faces may have a profiling, such as lines or grooves. It is also possible to insert metal plates between the segments.
  • the metal box 32 and the outer segment 31 are omitted and the metal channels 34 are disposed between the refractory material of the tap hole and the adjacent segment 35.
  • the distribution chamber takes an elongated shape, by cylindrical example and the metal channels are connected to it by welding. Note that the distribution chamber must have a sufficient cross-section to ensure a supply of the different channels under comparable pressure. Given that the inner segment 35 is then shortened by the thickness of the outer segment 31 (to keep a square section for the whole), a particularly compact embodiment is obtained.
  • Fig. 4 shows a variant in which the taphole is surrounded by a permeable element 44, in the form of a hollow truncated cone.
  • the tap hole consists of two and the permeable element by four pieces which fit together.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Charging Or Discharging (AREA)

Abstract

The device consists of a taphole (1) adjacent to means for blowing a bubbling-through agent into the steel bath (3). These means are immediately adjacent to the taphole, completely surround it and consist of permeable refractory elements (4, 5, 25, 44) each comprising at least one elongated segment (31, 35) made from a non-porous refractory material. Recesses run along both sides of the segment in the direction in which the gas is blown. Gas-dispensing means are arranged on the cold side of the elements and may consist of a chamber in the continuation of a metal box structure (32) which surrounds the segments made from refractory material (31, 35). In an alternative embodiment, flattened metal channels (33, 34) are arranged in the recesses and the gas is dispensed via an elongated chamber. The taphole preferably has the shape of a funnel (21) on the metal bath side and has a cross-section which decreases continuously in the direction of the cold side. <IMAGE>

Description

La présente invention concerne un dispositif pour vidanger des récipients métallurgiques, notamment des convertisseurs d'aciérie, contenant du métal et des scories.The present invention relates to a device for emptying metallurgical vessels, in particular steelworks converters, containing metal and slag.

Vers la fin de la coulée du métal, en particulier de l'acier, dans un récipient de transport ou de traitement, une certaine quantité de scorie passe à travers le trou de coulée. Il en résulte un risque de rephosphorisation de l'acier. D'autre part, par suite de l'activité élevée de l'oxygène dans la scorie, le traitement métallurgique des aciers calmés et semi-calmés s'effectue alors difficilement. De plus, la désulphuration de l'acier devient critique. Aussi s'efforce-t-on depuis longtemps d'éviter l'entraînement de scorie lors de la vidange de récipients métallurgiques et divers dispositifs utilisables à cette fin ont déjà été développés. Les plus connus de ces dispositifs sont le clapet d'obturation, la fermeture à tiroir et le flotteur massif, dont la section est plus large que celle de l'orifice d'écoulement et qui nage au-dessus de l'embouchure du trou de coulée. Ces flotteurs ont une densité comprise entre celle de la scorie et celle du métal et ont pour fonction d'obturer le trou de coulée, lorsque pratiquement tout le métal s'est écoulé.Towards the end of the pouring of the metal, in particular the steel, into a transport or processing container, a certain quantity of slag passes through the taphole. This results in a risk of rephosphorization of the steel. On the other hand, due to the high activity of oxygen in the slag, the metallurgical treatment of quenched and semi-quenched steels is then difficult to perform. In addition, the desulphurization of the steel becomes critical. We have therefore been striving for a long time to avoid entraining slag when emptying metallurgical vessels and various devices which can be used for this purpose have already been developed. The best known of these devices are the shutter valve, the drawer closure and the massive float, the cross section of which is wider than that of the flow orifice and which swims above the mouth of the casting. These floats have a density between that of the slag and that of the metal and have the function of closing the tap hole, when practically all the metal has flowed.

Ces dispositifs permettent sans doute de réduire l'écoulement de la scorie dans la poche, mais sont impropres à freiner la quantité de scorie entraînée par le tourbillon, dit vortex, qui se forme au-dessus du trou de coulée et dont le creux central peut traverser la profon­deur du bain. On a déjà proposé de diminuer l'effet de ce tourbillon par insufflation d'un gaz de barbotage dans le bain métallique, soit par le trou de coulée, soit au voisinage immédiat de ce dernier. Malheureusement les tuyères utilisées pour pratiquer l'insuffflation nécessitent, pour éviter leur obstruction d'importantes quantités de gaz, non seulement pendant la vidange, mais également pendant la campagne. D'autre part, les tuyères entrant en contact avec la scorie et le métal liquide, présentent des durées de vie nettement inférieures à celles du revêtement avoisinant.These devices undoubtedly make it possible to reduce the flow of slag in the pocket, but are unsuitable for slowing down the quantity of slag entrained by the vortex, known as a vortex, which forms above the taphole and whose central hollow can cross the depth of the bath. We have already proposed to reduce the effect of this vortex by blowing a bubbling gas into the metal bath, either through the tap hole, or in the immediate vicinity of the latter. Unfortunately, the nozzles used to practice insuffflation require, in order to avoid their obstruction, large quantities of gas, not only during the draining, but also during the campaign. On the other hand, the nozzles coming into contact with the slag and the liquid metal, have lifetimes much shorter than those of the surrounding coating.

Il est également connu de disposer aux abords du trou de coulée des éléments perméables au gaz, comportant des segments allongés ayant une section rectangulaire et munis du côté froid d'une chambre de distribution de gaz. Ces éléments perméables sont de préférence au nombre de deux ou de quatre et situés autour du trou de coulée à une distance de quelque 0,5 m de l'axe. Le bouillonnement continu de gaz à la surface du métal refoule la scorie, mais uniquement au-­dessus des éléments perméables et la scorie risque néanmoins d'atteindre le trou de coulée en s'écoulant entre les plages exemptes de scorie au-dessus des éléments perméables.It is also known to have gas-permeable elements around the taphole, comprising elongated segments having a rectangular section and provided on the cold side with a gas distribution chamber. These permeable elements are preferably two or four in number and located around the taphole at a distance of about 0.5 m from the axis. The continuous bubbling of gas on the surface of the metal expels the slag, but only above the permeable elements and the slag may nevertheless reach the taphole by flowing between the slag-free areas above the permeable elements .

La présente invention a pour but de remédier à ces inconvénients, et de limiter efficacement les quantités de scories entraînées par le tourbillon qui se forme au-dessus du trou de coulée.The object of the present invention is to remedy these drawbacks, and to effectively limit the quantities of slag entrained by the vortex which forms above the taphole.

Ce but est atteint par le dispositif suivant l'invention, tel qu'il est caractérisé dans la revendication 1. Des variantes d'exécution préférentielles sont décrites dans les revendications dépendantes.This object is achieved by the device according to the invention, as characterized in claim 1. Preferential alternative embodiments are described in the dependent claims.

L'agent de barbotage est utilement un gaz neutre comme l'argon, l'azote ou éventuellement l'anhydride carbonique. Les gaz employés servent en même temps comme gaz de lavage favorisant la remontée des inclusions d'impuretés, en suspension dans le métal, vers la surface. Le tour de coulée et les segments sont directement adjacents, l'encombrement est tolérable et le montage facile; de plus, les gaz ayant un effet refroidissant sur les parois du trou de coulée, leur usure est retardée.The bubbling agent is usefully a neutral gas such as argon, nitrogen or possibly carbon dioxide. The gases used serve at the same time as washing gases favoring the ascent of the inclusions of impurities, suspended in the metal, towards the surface. The casting lathe and the segments are directly adjacent, the dimensions are tolerable and the assembly is easy; moreover, the gases having a cooling effect on the walls of the taphole, their wear is delayed.

L'invention est exposée plus en détail à l'aide de la description de dessins schématisés qui en montrent, de manière non-limitative, des formes d'exécution possibles.

  • La Fig. 1 montre de manière schématique une coupe longitudinale à travers une partie d'un convertisseur possédant un trou de coulée selon l'invention,
  • la Fig. 2 une variante d'un trou de coulée selon l'invention et
  • les Fig. 3 et 4, des coupes transversales à travers des trous de coulée.
The invention is explained in more detail using the description of schematic drawings which show, without limitation, possible embodiments.
  • Fig. 1 schematically shows a longitudinal section through a part of a converter having a taphole according to the invention,
  • Fig. 2 a variant of a tap hole according to the invention and
  • Figs. 3 and 4, cross sections through tap holes.

On distingue en Fig.1 un trou de coulée 1 logé dans le revêtement 2 d'un convertisseur en position de vidange. Pour éviter tout écoule­ment prématuré de scorie et de métal lors du basculement, le trou de coulée 1 était préalablement obturé par un bouchon en bois. Après basculement, ce bouchon se consume rapidement et est refoulé hors du trou de coulée 1, libérant le passage à l'acier 3. Huit éléments perméables à un agent de barbotage sont situés aux abords du trou de coulée 1. Il est essentiel qu'une première série d'éléments permé­ables 4 soit adjacente à la pierre comportant le trou qui livre pas­sage à l'acier. Il est représenté également une deuxième série d'éléments perméables 5 qui peuvent être séparés de quelques dizaines de centimètres de la première série; la distance de sépa­ration optimale, le nombre et la dimension de ces éléments, leur degré de perméabilité minimal etc. sont déterminés pour chaque convertisseur par des essais de routine.In Fig.1, there is a tap hole 1 housed in the lining 2 of a converter in the drain position. To avoid any premature flow of slag and metal during tilting, the tap hole 1 was previously closed with a wooden plug. After tilting, this plug burns quickly and is pushed out of the tap hole 1, freeing the passage to steel 3. Eight elements permeable to a bubbling agent are located around the tap hole 1. It is essential that a first series of permeable elements 4 is adjacent to the stone comprising the hole which gives way to the steel. There is also shown a second series of permeable elements 5 which can be separated by a few tens of centimeters from the first series; the optimal separation distance, the number and size of these elements, their minimum degree of permeability etc. are determined for each converter by routine testing.

Les différents éléments perméables sont chacun munis du côté froid d'une chambre de distribution (non représentée) de laquelle part un conduit 7 aboutissant à des vannes de règlage du débit du gaz. On peut prévoir une alimentation individuelle de chaque élément per­méable mais habituellement les éléments de la première série sont alimentés en parallèle; il en est de même pour ceux de la deuxième série. Pour des raison d'économie de montage on peut évidemment alimenter tous les éléments perméables en parallèle. Il est cepen­dant avantageux d'avoir à sa disposition des possibilités de réglage différentiel des débits, et ceci surtout vers la fin de la coulée, lorsque la couche de scorie devient plus épaisse. A ce moment les éléments perméables 5 extérieurs requièrent un débit de gaz élevé pour refouler la couche de scorie.The different permeable elements are each provided on the cold side with a distribution chamber (not shown) from which a duct 7 leads, leading to valves for regulating the gas flow rate. One can provide an individual supply of each permeable element but usually the elements of the first series are supplied in parallel; it is the same for those of the second series. For reasons of assembly savings, it is obviously possible to supply all the permeable elements in parallel. It is however advantageous to have at its disposal possibilities for differential adjustment of the flow rates, and this especially towards the end of the casting, when the slag layer becomes thicker. At this time, the permeable exterior elements 5 require a high gas flow rate to discharge the slag layer.

Notons que pour pallier une percée éventuelle, les corps des élé­ments perméables 4,5 ne traversent pas toute l'épaisseur du revê­tement 2; pour la même raison les conduits 7 possèdent des chicanes (non représentées) capables d'assurer un figeage de l'acier.Note that to compensate for a possible breakthrough, the bodies of the permeable elements 4.5 do not cross the entire thickness of the coating 2; for the same reason the conduits 7 have baffles (not shown) capable of ensuring the freezing of the steel.

Au début de la vidange, lorsque les risques de formation du vortex sont réduits, la quantité total de gaz injectée est moyenne. Elle se fait en majeure partie par les éléments 4, adjacents au trou de coulée, de sorte à avoir une quantité donnée de gaz entraînée par le flot de métal s'écoulant du récipient; c'est ce gaz qui influe sur le profil d'usure de l'entrée et de la paroi du trou de coulée. La quantité restante du gaz sortant des éléments forme un rideau 8 en agent de barbotage autour du trou et remonte à la surface où il crée une plage 9 circulaire. Cette plage est dénuée de scorie, de sorte que l'acier peut s'écouler sans être chargé d'inclusions.At the start of the emptying, when the risks of vortex formation are reduced, the total amount of gas injected is average. It is mainly done by the elements 4, adjacent to the taphole, so as to have a given quantity of gas entrained by the flow of metal flowing from the container; it is this gas which influences the wear profile of the inlet and the wall of the tap hole. The remaining quantity of gas leaving the elements forms a curtain 8 of bubbling agent around the hole and rises to the surface where it creates a circular area 9. This range is free of slag, so that the steel can flow without being loaded with inclusions.

Vers la fin de la coulée, lorsque les risques de formation d'un vor­tex s'accroissent, la quantité de gaz injectée par les éléments adjacents au trou de coulée est augmentée au maximum. Pareillement la quantité de gaz traversant les éléments 5 est augmentée, moins pour contrecarrer la création du vortex, mais plutôt pour repousser la scorie au-dessus du trou.Towards the end of the pouring, when the risks of forming a vortex increase, the quantity of gas injected by the elements adjacent to the taphole is increased to the maximum. Similarly, the amount of gas passing through the elements 5 is increased, less to counteract the creation of the vortex, but rather to push the slag over the hole.

Pendant la campagne, un débit de gaz de ca. deux m³/heure assure la perméabilité d'un élément réfractaire. Au moment du basculement le débit est augmenté jusqu'à une dixaine de m³/heure pour atteindre une vingtaine de m³/heure vers la fin de la coulée. Notons que des débits exagérés de gaz vers la fin de la coulée provoquent des pro­jections de métal et de scorie peu favorables à une coulée propre. Pareillement, il n'est pas indiqué d'injecter des quantités exagérées de gaz dans le bain, pour éviter un refroidissement notable du métal.During the campaign, a gas flow of ca. two m³ / hour ensures the permeability of a refractory element. At the time of the changeover the flow is increased up to ten m³ / hour to reach twenty m³ / hour towards the end of the casting. Note that exaggerated gas flows towards the end of the casting cause metal and slag splashes which are not favorable for a clean casting. Likewise, it is not advisable to inject exaggerated amounts of gas into the bath, to avoid significant cooling of the metal.

En Fig. 2 est représentée une variante, dans laquelle la deuxième série d'éléments perméables 25 est séparée d'une distance minimale de la première série 4. Une telle exécution peut être imposée par des contraintes provenant de détails constructifs du revêtement 2. Elle doit également être choisie, lorsque la perméabilité des éléments réfractaires 4 n'est pas suffisante pour contrecarrer efficacement la création du vortex.In Fig. 2 shows a variant, in which the second series of permeable elements 25 is separated by a minimum distance from the first series 4. Such an execution may be imposed by constraints coming from constructive details of the coating 2. It must also be chosen, when the permeability of the refractory elements 4 is not sufficient to effectively counteract the creation of the vortex.

Un trou de coulée est habituellement constitué par plusieurs viroles superposées à orifices cylindriques. Pour obtenir une coulée régulière il est avantageux de donner à la virole supérieure une configuration en entonnoir d'admission (voir référence 21). En superposant des viroles dont le diamètre des orifices se rétrécit par degrés en direction du côté froid on obtient un trou de coulée conique (voir référence 22) qui s'adapte de façon optimale au jet de coulée; les marches entre les viroles de diamètre différent sont rapidement éliminées lors de la première coulée.A tap hole is usually made up of several superimposed ferrules with cylindrical orifices. To obtain regular pouring, it is advantageous to give the upper shell a configuration in the form of an inlet funnel (see reference 21). By superimposing ferrules whose diameter of the orifices narrows by degrees in the direction of the cold side, a conical taphole (see reference 22) is obtained which optimally adapts to the pouring jet; the steps between the ferrules of different diameter are quickly eliminated during the first pouring.

La Fig. 3 montre des détails d'un trou de coulée 1 entouré d'une série de quatre éléments perméables 4. Chacun des quatre éléments perméables est constitué par deux segments avoisinants en matériau réfractaire 31, 35, entourés par un caisson métallique 32. Du côté froid de l'élément, une chambre de distribution (non visible) est soudée aux parois de ce caisson . Le passage du gaz se fait en majeure partie à l'interface des segments. Une des faces adjacentes peut présenter un profilage, tel que raies ou sillons. Il est également possible d'intercaler des plaques métalliques entre les segments.Fig. 3 shows details of a tap hole 1 surrounded by a series of four permeable elements 4. Each of the four permeable elements is constituted by two neighboring segments of refractory material 31, 35, surrounded by a metal box 32. On the cold side of the element, a distribution chamber (not visible) is welded to the walls of this box. Most of the gas is passed at the interface of the segments. One of the adjacent faces may have a profiling, such as lines or grooves. It is also possible to insert metal plates between the segments.

Lorsqu'on envisage d'injecter dans le métal un gaz susceptible de décomposer le matériau des segments, il faut entourer ceux-ci de tous les côtés d'une enveloppe métallique protectrice ou bien loger des canaux métalliques aplatis 33 entre les segments 31 et 35, tel qu'expliqué p.ex. dans le brevet LU 85.131.When considering injecting into the metal a gas capable of decomposing the material of the segments, it is necessary to surround these on all sides with a protective metallic envelope or else to house flat metal channels 33 between the segments 31 and 35 , as explained for example in patent LU 85,131.

Dans une variante, le caisson métallique 32 et le segment extérieur 31 sont supprimés et les canaux métalliques 34 sont disposés entre le matériau réfractaire du trou de coulée et le segment 35 adjacent. Dans ce cas la chambre de distribution prend une forme allongée, par exemple cylindrique et les canaux métalliques y sont reliés par soudage. Notons que la chambre de distribution doit avoir une section suffisante pour assurer une alimentation des différents canaux sous pression comparable. Etant donné que le segment intérieur 35 est alors raccourci de l'épaisseur du segment extérieur 31 (pour conserver une section carrée à l'ensemble) on obtient un mode d'exécution particulièrement compact. Il est bien évident qu'au lieu de choisir des segments 35 monolithiques, on peut les recon­stituer en juxtaposant plusieurs briques réfractaires; pareillement, en disposant plusieurs rangées de canaux métalliques en parallèle, séparées les unes des autres par des segments réfractaires et alimentées par une ou plusieurs chambres de distribution disposées du côté froid des segments, on ne sort pas du cadre de l'invention.Alternatively, the metal box 32 and the outer segment 31 are omitted and the metal channels 34 are disposed between the refractory material of the tap hole and the adjacent segment 35. In this case the distribution chamber takes an elongated shape, by cylindrical example and the metal channels are connected to it by welding. Note that the distribution chamber must have a sufficient cross-section to ensure a supply of the different channels under comparable pressure. Given that the inner segment 35 is then shortened by the thickness of the outer segment 31 (to keep a square section for the whole), a particularly compact embodiment is obtained. It is quite obvious that instead of choosing monolithic segments, they can be reconstituted by juxtaposing several refractory bricks; Similarly, by having several rows of metal channels in parallel, separated from each other by refractory segments and fed by one or more distribution chambers arranged on the cold side of the segments, it is not going beyond the ambit of the invention.

La Fig. 4 montre une variante dans laquelle le trou de coulée est entouré d'un élément perméable 44, ayant la forme d'un cône tronqué creux. Le trou de coulée est constitué par deux et l'élément per­méable par quatre morceaux qui s'emboîtent.Fig. 4 shows a variant in which the taphole is surrounded by a permeable element 44, in the form of a hollow truncated cone. The tap hole consists of two and the permeable element by four pieces which fit together.

Claims (10)

1. Dispositif pour vidanger des récipients métallurgiques contenant du metal et des scories, lequel dispositif est constitué par un trou de coulée avoisiné de moyens pour insuffler un agent de barbotage dans le bain, caractérisé en ce que ces moyens sont immédiatement adjacents au trou de coulée (1), l'entourent complètement et sont constitués par des éléments réfractaires perméables (4, 5, 25, 44), comportant chacun au moins un segment allongé (31, 35) en matériau réfractaire non poreux, ayant de préférence une section rectangulaire, en ce que des évidements longent les segments de part en part dans le sens du soufflage gazeux et en ce que du côté froid des éléments réfractaires sont prévus des moyens de distribution de gaz, reliés par l'intermé­diaire d'un conduit à une source d'agent de barbotage.1. Device for emptying metallurgical vessels containing metal and slag, which device consists of a tap hole adjacent to means for blowing a bubbling agent into the bath, characterized in that these means are immediately adjacent to the tap hole (1), completely surround it and are constituted by permeable refractory elements (4, 5, 25, 44), each comprising at least one elongated segment (31, 35) of non-porous refractory material, preferably having a rectangular section , in that recesses run right through the segments in the direction of gas blowing and in that on the cold side of the refractory elements are provided gas distribution means, connected via a conduit to a source bubbling agent. 2. Dispositif selon la revendication 1, caractérisé en ce que des canaux métalliques aplatis (33, 34) sont disposés dans lesdits évidements.2. Device according to claim 1, characterized in that flattened metal channels (33, 34) are arranged in said recesses. 3. Dispositif selon la revendication 2, caractérisé en ce que les canaux métalliques (33) sont disposés entre deux segments (31, 35).3. Device according to claim 2, characterized in that the metal channels (33) are arranged between two segments (31, 35). 4. Dispositif selon une des revendications 2 ou 3, caractérisé en ce que les canaux métalliques (34) sont disposés entre les segments (35) et le trou de coulée (1).4. Device according to one of claims 2 or 3, characterized in that the metal channels (34) are arranged between the segments (35) and the taphole (1). 5. Dispositif selon une des revendications 1-4, caractérisé en ce que les moyens de distribution du gaz sont constitués par une chambre allongée dans laquelle débouchent les canaux métalliques (33, 34).5. Device according to one of claims 1-4, characterized in that the gas distribution means are constituted by an elongated chamber into which open the metal channels (33, 34). 6. Dispositif selon une des revendications 1-3, caractérisé en ce que les moyens de distribution sont constitués par une chambre dans la prolongation d'un caisson métallique (32) qui entoure les segments en matériau réfractaire (31, 35).6. Device according to one of claims 1-3, characterized in that the distribution means are constituted by a chamber in the extension of a metal box (32) which surrounds the segments of refractory material (31, 35). 7. Dispositif selon une des revendications 1 à 6, caractérisé en ce que le trou de coulée a du côté bain métallique une configuration en entonnoir (21).7. Device according to one of claims 1 to 6, characterized in that the tap hole has on the metal bath side a funnel configuration (21). 8. Dispositif selon la revendication 7, caractérisé en ce que la section du trou de coulée diminue continûment en direction du côté froid.8. Device according to claim 7, characterized in that the section of the tap hole decreases continuously in the direction of the cold side. 9. Dispositif selon la revendication 1, caractérisé en ce qu'il comporte une première série d'éléments réfractaires perméables (4), adjacents au trou de coulée, ainsi que des éléments réfrac­taires perméables (5) supplémentaires, distants d'au moins 10 centimètres de la première série.9. Device according to claim 1, characterized in that it comprises a first series of permeable refractory elements (4), adjacent to the taphole, as well as additional permeable refractory elements (5), at least 10 apart centimeters from the first series. 10. Dispositif selon la revendication 1, caractérisé en ce que la source d'agent de barbotage contient de l'azote, de l'argon ou de l'anhydride carbonique.10. Device according to claim 1, characterized in that the source of bubbling agent contains nitrogen, argon or carbon dioxide.
EP88103223A 1987-03-19 1988-03-03 Device for emptying metallurgical vessels Withdrawn EP0282824A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU86816A LU86816A1 (en) 1987-03-19 1987-03-19 DEVICE FOR DRAINING METALLURGICAL CONTAINERS
LU86816 1987-03-19

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EP0282824A2 true EP0282824A2 (en) 1988-09-21
EP0282824A3 EP0282824A3 (en) 1989-03-15

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EP88103223A Withdrawn EP0282824A3 (en) 1987-03-19 1988-03-03 Device for emptying metallurgical vessels

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EP (1) EP0282824A3 (en)
JP (1) JPS63255313A (en)
AU (1) AU1287288A (en)
DE (1) DE3807333A1 (en)
FR (1) FR2612433A1 (en)
LU (1) LU86816A1 (en)
ZA (1) ZA881701B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2025431A1 (en) * 2007-08-17 2009-02-18 LLC "TMT" Peresechenie Logoiskiy tr&MKAD Device for metal refining in the pony ladle
EP2255904A1 (en) 2009-05-27 2010-12-01 Calderys France Refractory purging porous block

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19820727A1 (en) * 1998-05-11 1999-11-25 Berthold Raubuch Vessel for holding liquid steel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4487251A (en) * 1982-03-08 1984-12-11 Vesuvius Crucible Company Continuous casting apparatus and a method of using the same
EP0146079A2 (en) * 1983-12-12 1985-06-26 Arbed S.A. Gas-permeable refractory plug
DE3149399C1 (en) * 1981-12-09 1987-07-09 Mannesmann AG, 4000 Düsseldorf Submerged (immersion) nozzle
AT383529B (en) * 1985-10-24 1987-07-10 Voest Alpine Ag Arrangement for pouring melts

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3149399C1 (en) * 1981-12-09 1987-07-09 Mannesmann AG, 4000 Düsseldorf Submerged (immersion) nozzle
US4487251A (en) * 1982-03-08 1984-12-11 Vesuvius Crucible Company Continuous casting apparatus and a method of using the same
EP0146079A2 (en) * 1983-12-12 1985-06-26 Arbed S.A. Gas-permeable refractory plug
AT383529B (en) * 1985-10-24 1987-07-10 Voest Alpine Ag Arrangement for pouring melts

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2025431A1 (en) * 2007-08-17 2009-02-18 LLC "TMT" Peresechenie Logoiskiy tr&MKAD Device for metal refining in the pony ladle
EP2255904A1 (en) 2009-05-27 2010-12-01 Calderys France Refractory purging porous block
WO2010136519A1 (en) * 2009-05-27 2010-12-02 Calderys France Refractory purging porous block

Also Published As

Publication number Publication date
ZA881701B (en) 1988-09-06
DE3807333A1 (en) 1988-10-06
JPS63255313A (en) 1988-10-21
AU1287288A (en) 1988-09-22
FR2612433A1 (en) 1988-09-23
EP0282824A3 (en) 1989-03-15
LU86816A1 (en) 1988-11-17

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