EP1371433A1 - Process for casting metallurgical products in a continuous casting machine, comprising a tundish - Google Patents
Process for casting metallurgical products in a continuous casting machine, comprising a tundish Download PDFInfo
- Publication number
- EP1371433A1 EP1371433A1 EP03291435A EP03291435A EP1371433A1 EP 1371433 A1 EP1371433 A1 EP 1371433A1 EP 03291435 A EP03291435 A EP 03291435A EP 03291435 A EP03291435 A EP 03291435A EP 1371433 A1 EP1371433 A1 EP 1371433A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- distributor
- sheets
- metal
- casting
- preheating
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005266 casting Methods 0.000 title claims description 18
- 238000009749 continuous casting Methods 0.000 title claims description 9
- 239000002184 metal Substances 0.000 claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 claims abstract description 25
- 239000011819 refractory material Substances 0.000 claims abstract description 16
- 238000009434 installation Methods 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 230000006698 induction Effects 0.000 claims abstract description 4
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 229940082150 encore Drugs 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
-
- 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
- B22D41/02—Linings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
Definitions
- the invention relates to the continuous casting of metals, and more particularly the continuous casting of steel, especially in the form of strips thin.
- Liquid steel is traditionally produced in a converter from liquid iron or electric furnace from scrap. Then its composition precise is set in a pocket. Finally, it is cast on a casting machine keep on going.
- the dispatcher constitutes a reserve of liquid metal which makes it possible to maintain a flow feeding the ingot mold to the desired value at all stages of casting, especially at the start and end of bag emptying, as well as during periods when a ladle change takes place. This allows the emptying of several consecutive pockets without interrupting the pouring (pouring in in sequence).
- the distributor serves as a "buffer" container between the pocket and the ingot (s).
- the first cause can to some extent be remedied by covering the distributor and blowing an inert gas such as argon under the cover, so as to make the atmosphere at the start of casting non-oxidizing.
- Non-metallic inclusions formed during filling of the distributor are mainly found in the surface layers of first tonnes of product poured.
- the product is a slab classic thick (around 200mm for example), it can be tolerable to remove these surface layers by grinding the surface of the slab or a few slabs affected by this fault.
- the object of the invention is to provide users of casting metals, especially steel, and in particular thin strip casting, an efficient and economical way to improve appreciably the cleanliness of the first tonnes poured.
- the invention relates to a process for casting products metal on a continuous casting installation with a distributor coated internally with a refractory material, characterized in that fixed metal sheets on the surface of said refractory material, prior to filling of said distributor with the liquid metal to be poured.
- At least part of the said is fixed. sheets before a distributor preheating operation.
- said sheets are fixed after a distributor preheating operation.
- Said sheets preferably have a composition corresponding to that of cast metal.
- the casting installation continuous is an installation for continuous casting of thin strips.
- the invention essentially consists in internally coat the distributor, before the start of casting, with a set of metal sheets avoiding direct contact between the first tonnes of metal spilled into the distributor and the new refractories from the distributor.
- the contacts between the liquid metal and the refractories are thus, essentially, delayed until the sheet melting This occurs preferably at a when the distributor is completely filled, with flows of metal corresponding to a steady flow regime.
- the dispatcher is coated internally by refractory materials based on oxides (lime, magnesia, alumina, mainly silica) present in variable proportions.
- oxides limestone, magnesia, alumina, mainly silica
- the choice of the composition of these refractories is dictated by considerations of refractoriness, chemical compatibility with the steel to be cast and cost. These refractories can be shaped or flowable.
- the refractory of the distributor are subsequently heated by burners to dry them and to give them a high temperature before casting, limiting losses of the liquid metal when it is introduced into the distributor.
- metal sheets are also prepared intended to cover at least most of the interior coating of the distributor.
- These sheets can be fixed separately on the bottom and the walls side of the distributor by means such as nails, staples etc. At least some of them can also be joined together before they are fixed to the refractories of the distributor.
- the sheets are fixed to the of the distributor while they are still cold.
- the distributor is sent to the preheating station, so that the flames of the burners no longer come into direct contact with refractory, but sheets.
- This can result in local sheet metal mergers at level of flame impacts. But these mergers only concern areas limited and do not call into question the essential protective capacities of sheets.
- the sheets will expand: the means must fixing take into account this expansion so as to prevent the sheets do not curl excessively. For example, if you use nails, you can allow cold clearance between the nails and the contours of the orifices made in the sheets to receive them.
- Another variant of the invention consists in installing the sheets in the distributor already preheated, at least for the most part, if we can use sheet fastening devices protected against refractory radiation of the dispatcher.
- the preheating of the sheets is then carried out by burners, or by an induction device which makes it possible to reach the desired temperature, in the range of 1100-1200 ° C, in a few minutes.
- the area surrounding each of the nozzles through which the liquid metal flows during the casting so that the distaff controlling the flow of the liquid metal by said nozzle can play its role.
- the material of the sheets is chosen so that after it has melted, the components it contains do not change the composition of the metal cast way which places it outside the composition limits for products to be flow.
- the sheets have a composition in accordance with that of said products to be poured.
- they are constituted by portions of bands which have been discarded after their casting (if one is in the case of a installation of thin strip casting) or their rolling, for example heads and coil tails.
- the thickness of the sheets is preferably chosen so that their fusion does not end until the distributor has been filled, and preferably after the start of casting, so at a time when the flows inside the dispatcher have reached their normal regime. At this time, a direct contact generalized between the molten liquid metal and the refractories is possible without cause excessive pollution of the metal. Indeed, inclusions from first metal-refractory reactions will be distributed in a metal flow in continuous flow, instead of concentrating in the metal used for the first filling the distributor as in the prior practice which the invention aims to improve.
- the invention finds, as has been said, a preferred application for installations for the direct casting of thin strips, for which, in general, distributors are relatively small, so with a surface area ratio of refractories / high enclosed metal volume.
- Steel casting is a prime example of application of the invention, but it goes without saying that this can be used for continuous casting of other metals and alloys.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Laminated Bodies (AREA)
Abstract
Description
L'invention concerne la coulée continue des métaux, et plus particulièrement la coulée continue de l'acier, notamment sous forme de bandes minces.The invention relates to the continuous casting of metals, and more particularly the continuous casting of steel, especially in the form of strips thin.
L'acier liquide est traditionnellement élaboré au convertisseur à partir de fonte liquide ou au four électrique à partir de ferrailles. Puis sa composition précise est réglée dans une poche. Enfin, il est coulé sur une machine de coulée continue. Celle-ci comporte un répartiteur, qui est un récipient revêtu intérieurement de réfractaires et recevant l'acier liquide s'écoulant par le fond de la poche à travers un tube en réfractaire. Le métal liquide s'écoule ensuite par le fond du répartiteur dans une ou plusieurs lingotières sans fond à parois énergiquement refroidies, où s'initie la solidification du produit. Le répartiteur constitue une réserve de métal liquide qui permet de conserver un débit d'alimentation de la lingotière à la valeur désirée à tous les stades de la coulée, notamment en début et en fin de vidange de la poche, ainsi que pendant les périodes où a lieu un changement de poche de coulée. Cela permet de réaliser la vidange de plusieurs poches consécutives sans interrompre la coulée (coulée en en séquence). Autrement dit, le répartiteur sert de récipient « tampon » entre la poche et la ou les lingotières.Liquid steel is traditionally produced in a converter from liquid iron or electric furnace from scrap. Then its composition precise is set in a pocket. Finally, it is cast on a casting machine keep on going. This includes a distributor, which is a coated container internally refractory and receiving the liquid steel flowing through the bottom of the pocket through a refractory tube. The liquid metal then flows through the bottom of the distributor in one or more molds without bottom with walls energetically cooled, where the solidification of the product begins. The dispatcher constitutes a reserve of liquid metal which makes it possible to maintain a flow feeding the ingot mold to the desired value at all stages of casting, especially at the start and end of bag emptying, as well as during periods when a ladle change takes place. This allows the emptying of several consecutive pockets without interrupting the pouring (pouring in in sequence). In other words, the distributor serves as a "buffer" container between the pocket and the ingot (s).
Habituellement, les premières tonnes d'acier coulées, qui ont servi à remplir le répartiteur initialement vide, présentent une propreté inclusionnaire notablement plus médiocre que les suivantes. Cela est dû à la conjonction de deux phénomènes :
- d'une part, le fait que lors des premiers instants du remplissage, l'acier liquide s'écoule à l'air libre, l'extrémité du tube en réfractaire n'étant pas encore immergée dans l'acier liquide ;
- d'autre part des réactions chimiques entre les éléments désoxydants contenus dans l'acier liquide et certains composants de la surface des réfractaires revêtant le répartiteur ; les inclusions issues de ces réactions se concentrent dans le métal servant au remplissage du répartiteur.
- on the one hand, the fact that during the first moments of filling, the liquid steel flows in the open air, the end of the refractory tube not yet being immersed in the liquid steel;
- on the other hand chemical reactions between the deoxidizing elements contained in the liquid steel and certain components of the surface of the refractories coating the distributor; the inclusions resulting from these reactions are concentrated in the metal used to fill the distributor.
On peut dans une certaine mesure remédier à la première cause en capotant le répartiteur et en insufflant un gaz inerte tel que de l'argon sous le capot, de manière à rendre l'atmosphère du début de coulée non oxydante.The first cause can to some extent be remedied by covering the distributor and blowing an inert gas such as argon under the cover, so as to make the atmosphere at the start of casting non-oxidizing.
En revanche, on n'a pas de moyen satisfaisant pour remédier à la deuxième cause, mis à part de revêtir le répartiteur avec des réfractaires très résistants aux attaques chimiques, qui sont inévitablement coûteux et pas toujours optimaux d'un point de vue thermique.However, there is no satisfactory way to remedy the second cause, apart from coating the distributor with refractories very resistant to chemical attack, which is inevitably expensive and not always optimal from a thermal point of view.
Les inclusions non-métalliques formées lors du remplissage du répartiteur se retrouvent en grande partie dans les couches superficielles des premières tonnes de produit coulées. Dans le cas où le produit est une brame classique de forte épaisseur (de l'ordre de 200mm par exemple), il peut être tolérable de supprimer ces couches superficielles par un meulage de la surface de la brame ou des quelques brames affectées par ce défaut.Non-metallic inclusions formed during filling of the distributor are mainly found in the surface layers of first tonnes of product poured. In case the product is a slab classic thick (around 200mm for example), it can be tolerable to remove these surface layers by grinding the surface of the slab or a few slabs affected by this fault.
En revanche, lorsque le produit est une bande mince de quelques mm d'épaisseur, pouvant notamment être coulée sur une installation de coulée entre deux cylindres refroidis intérieurement et tournant en sens contraires, un tel meulage serait absolument rédhibitoire d'un point de vue économique. ll concernerait une surface de produit trop importante et serait donc exagérément long, et enlèverait une quantité de matière excessive par rapport à la quantité d'acier coulée. De plus il nécessiterait un débobinage de la bande avant ses traitements à froid.On the other hand, when the product is a thin strip of a few mm thick, which can in particular be poured on a casting installation between two cylinders internally cooled and rotating in opposite directions, such grinding would be absolutely unacceptable from an economic point of view. It would concern too large a product surface and would therefore be excessively long, and would remove an excessive amount of material compared to the amount of cast steel. In addition, it would require unwinding the tape before cold treatments.
Le but de l'invention est de procurer aux utilisateurs de coulées continues des métaux, notamment d'acier, et en particulier d'installations de coulées de bandes minces, un moyen efficace et économique pour améliorer sensiblement la propreté des premières tonnes coulées .The object of the invention is to provide users of casting metals, especially steel, and in particular thin strip casting, an efficient and economical way to improve appreciably the cleanliness of the first tonnes poured.
A cet effet, l'invention a pour objet un procédé de coulée de produits métalliques sur une installation de coulée continue comportant un répartiteur revêtu intérieurement d'un matériau réfractaire, caractérisé en ce qu'on fixe des tôles métalliques sur la surface dudit matériau réfractaire, préalablement au remplissage dudit répartiteur par le métal liquide à couler.To this end, the invention relates to a process for casting products metal on a continuous casting installation with a distributor coated internally with a refractory material, characterized in that fixed metal sheets on the surface of said refractory material, prior to filling of said distributor with the liquid metal to be poured.
Selon une variante de l'invention, on fixe au moins une partie desdites tôles avant une opération de préchauffage du répartiteur.According to a variant of the invention, at least part of the said is fixed. sheets before a distributor preheating operation.
Selon une autre variante de l'invention, on fixe lesdites tôles après une opération de préchauffage du répartiteur.According to another variant of the invention, said sheets are fixed after a distributor preheating operation.
On peut réaliser un préchauffage final desdites tôles au moyen d'un dispositif à induction.It is possible to carry out a final preheating of said sheets by means of a induction device.
Lesdites tôles ont de préférence une composition correspondant à celle du métal coulé.Said sheets preferably have a composition corresponding to that of cast metal.
Dans un exemple d'application privilégié, l'installation de coulée continue est une installation de coulée continue de bandes minces.In a preferred application example, the casting installation continuous is an installation for continuous casting of thin strips.
Comme on l'aura compris, l'invention consiste essentiellement à revêtir intérieurement le répartiteur, avant le début de la coulée, par un ensemble de tôles métalliques évitant un contact direct entre les premières tonnes de métal déversées dans le répartiteur et les réfractaires neufs du répartiteur. Les contacts entre le métal liquide et les réfractaires sont ainsi, pour l'essentiel, retardés jusqu'à la fusion des tôles Celle-ci se produit de préférence à un moment où le répartiteur est complètement rempli, avec des écoulements de métal correspondant à un régime d'écoulements stables.As will be understood, the invention essentially consists in internally coat the distributor, before the start of casting, with a set of metal sheets avoiding direct contact between the first tonnes of metal spilled into the distributor and the new refractories from the distributor. The contacts between the liquid metal and the refractories are thus, essentially, delayed until the sheet melting This occurs preferably at a when the distributor is completely filled, with flows of metal corresponding to a steady flow regime.
L'invention sera mieux comprise à la lecture de la description qui suit.The invention will be better understood on reading the description which follows.
Conformément à la pratique antérieure, le répartiteur est revêtu intérieurement par des matériaux réfractaires à base d'oxydes (chaux, magnésie, alumine, silice essentiellement) présents dans des proportions variables. Le choix de la composition de ces réfractaires est dicté par des considérations de réfractarité, de compatibilité chimique avec l'acier à couler et de coût. Ces réfractaires peuvent être sous forme façonnée ou coulable. Puis les réfractaires du répartiteur sont ultérieurement chauffés par des brûleurs pour les sécher et pour leur conférer avant la coulée une température élevée limitant les pertes thermiques du métal liquide lors de son introduction dans le répartiteur.In accordance with previous practice, the dispatcher is coated internally by refractory materials based on oxides (lime, magnesia, alumina, mainly silica) present in variable proportions. The choice of the composition of these refractories is dictated by considerations of refractoriness, chemical compatibility with the steel to be cast and cost. These refractories can be shaped or flowable. Then the refractory of the distributor are subsequently heated by burners to dry them and to give them a high temperature before casting, limiting losses of the liquid metal when it is introduced into the distributor.
Selon l'invention, on prépare également des tôles métalliques destinées à recouvrir au moins la plus grande partie du revêtement intérieur du répartiteur.According to the invention, metal sheets are also prepared intended to cover at least most of the interior coating of the distributor.
Ces tôles peuvent être fixées séparément sur le fond et les parois latérales du répartiteur par des moyens tels que des clous, des agrafes etc. Au moins certaines d'entre elles peuvent aussi être assemblées les unes aux autres avant leur fixation aux réfractaires du répartiteur.These sheets can be fixed separately on the bottom and the walls side of the distributor by means such as nails, staples etc. At least some of them can also be joined together before they are fixed to the refractories of the distributor.
Selon une première variante de l'invention, les tôles sont fixées sur les réfractaires du répartiteur alors que ceux-ci sont encore froids. Après cette fixation des tôles, le répartiteur est envoyé à la station de préchauffage, de sorte que les flammes des brûleurs viennent au contact non plus directement des réfractaires, mais des tôles. Il peut en résulter des fusions locales des tôles au niveau des impacts des flammes. Mais ces fusions ne concernent que des zones limitées et ne remettent pas en question l'essentiel des capacités protectrices des tôles. Au cours du préchauffage, les tôles vont se dilater : il faut que les moyens de fixation prennent en compte cette dilatation de manière à éviter que les tôles ne se gondolent exagérément. Par exemple, si on utilise des clous, on peut prévoir à froid un jeu important entre les clous et les contours des orifices pratiqués dans les tôles pour les recevoir.According to a first variant of the invention, the sheets are fixed to the of the distributor while they are still cold. After this fixing of the sheets, the distributor is sent to the preheating station, so that the flames of the burners no longer come into direct contact with refractory, but sheets. This can result in local sheet metal mergers at level of flame impacts. But these mergers only concern areas limited and do not call into question the essential protective capacities of sheets. During preheating, the sheets will expand: the means must fixing take into account this expansion so as to prevent the sheets do not curl excessively. For example, if you use nails, you can allow cold clearance between the nails and the contours of the orifices made in the sheets to receive them.
Une autre variante de l'invention consiste à installer les tôles dans le répartiteur déjà préchauffé, au moins pour l'essentiel, si on peut utiliser des dispositifs de fixation des tôles protégés contre le rayonnement des réfractaires du répartiteur. Le préchauffage des tôles est ensuite effectué par des brûleurs, ou par un dispositif à induction qui permet d'atteindre la température souhaitée, de l'ordre de 1100-1200°C, en quelques minutes. Another variant of the invention consists in installing the sheets in the distributor already preheated, at least for the most part, if we can use sheet fastening devices protected against refractory radiation of the dispatcher. The preheating of the sheets is then carried out by burners, or by an induction device which makes it possible to reach the desired temperature, in the range of 1100-1200 ° C, in a few minutes.
On peut aussi combiner ces deux méthodes en installant une partie des tôles avant le début du préchauffage et le restant à une étape ultérieure.We can also combine these two methods by installing a part sheets before the start of preheating and the rest at a later stage.
Lors du revêtement du répartiteur par les tôles, il faut laisser libre la zone entourant chacune des busettes par où le métal liquide s'écoule lors de la coulée pour que la quenouille commandant l'écoulement du métal liquide par ladite busette puisse jouer son rôle.When coating the distributor with the sheets, the area surrounding each of the nozzles through which the liquid metal flows during the casting so that the distaff controlling the flow of the liquid metal by said nozzle can play its role.
Le matériau des tôles est choisi de telle sorte qu'après sa fusion, les composants qu'il renferme ne modifient pas la composition du métal coulé d'une façon qui le place hors des limites de composition visées pour les produits à couler. Optimalement, les tôles ont une composition conforme à celle desdits produits à couler. Avantageusement, elles sont constituées par des portions de bandes qui ont été rebutées après leur coulée (si on se trouve dans le cas d'une installation de coulée de bandes minces) ou leur laminage, par exemple des têtes et des queues de bobines.The material of the sheets is chosen so that after it has melted, the components it contains do not change the composition of the metal cast way which places it outside the composition limits for products to be flow. Optimally, the sheets have a composition in accordance with that of said products to be poured. Advantageously, they are constituted by portions of bands which have been discarded after their casting (if one is in the case of a installation of thin strip casting) or their rolling, for example heads and coil tails.
L'épaisseur des tôles est préférentiellement choisie pour que leur fusion ne s'achève qu'après le remplissage du répartiteur, et de préférence après le début de la coulée, donc à un moment où les écoulements à l'intérieur du répartiteur ont atteint leur régime normal. A ce moment, un contact, direct généralisé entre le métal liquide coulé et les réfractaires est possible sans entraíner une pollution trop forte du métal. En effet, les inclusions issues des premières réactions métal-réfractaire vont se répartir dans un flux de métal en écoulement continu, au lieu de se concentrer dans le métal servant au premier remplissage du répartiteur comme dans la pratique antérieure que l'invention vise à améliorer.The thickness of the sheets is preferably chosen so that their fusion does not end until the distributor has been filled, and preferably after the start of casting, so at a time when the flows inside the dispatcher have reached their normal regime. At this time, a direct contact generalized between the molten liquid metal and the refractories is possible without cause excessive pollution of the metal. Indeed, inclusions from first metal-refractory reactions will be distributed in a metal flow in continuous flow, instead of concentrating in the metal used for the first filling the distributor as in the prior practice which the invention aims to improve.
L'invention trouve, comme on l'a dit, une application privilégiée aux installations de coulée directe de bandes minces, pour lesquelles, en général, les répartiteurs sont de relativement petite taille, donc avec un rapport surface de réfractaires/volume de métal renfermé élevé.The invention finds, as has been said, a preferred application for installations for the direct casting of thin strips, for which, in general, distributors are relatively small, so with a surface area ratio of refractories / high enclosed metal volume.
La coulée d'acier est un exemple privilégié d'application de l'invention, mais il va de soi que celle-ci peut être utilisée pour la coulée continue d'autres métaux et alliages.Steel casting is a prime example of application of the invention, but it goes without saying that this can be used for continuous casting of other metals and alloys.
Claims (6)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0207384A FR2840828B1 (en) | 2002-06-14 | 2002-06-14 | PROCESS FOR CASTING METALLURGICAL PRODUCTS ON A CONTINUOUS CASTING SYSTEM COMPRISING A DISTRIBUTOR |
| FR0207384 | 2002-06-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1371433A1 true EP1371433A1 (en) | 2003-12-17 |
Family
ID=29559180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03291435A Withdrawn EP1371433A1 (en) | 2002-06-14 | 2003-06-13 | Process for casting metallurgical products in a continuous casting machine, comprising a tundish |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20040011500A1 (en) |
| EP (1) | EP1371433A1 (en) |
| JP (1) | JP2004034156A (en) |
| KR (1) | KR20030096078A (en) |
| AU (1) | AU2003204668A1 (en) |
| BR (1) | BR0302070A (en) |
| FR (1) | FR2840828B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8546721B2 (en) | 2007-11-20 | 2013-10-01 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Seam position control for laser processing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4096976A (en) * | 1975-06-30 | 1978-06-27 | Daussan Et Compagnie | Vessels for transferring liquid metal having a removable insulating lining |
| GB1522764A (en) * | 1975-06-25 | 1978-08-31 | Centre Rech Metallurgique | Metallurgical vessel |
| US4165026A (en) * | 1971-12-07 | 1979-08-21 | Foseco Trading A.G. | Tundish with expendable lining and easily removable nozzle |
| GB1569970A (en) * | 1977-03-08 | 1980-06-25 | Metalaids Processes Ltd | Tundish lining |
| GB2085133A (en) * | 1980-10-14 | 1982-04-21 | London Scandinavian Metall | Refractory linings for metallurgical vessels |
| JPS59118253A (en) * | 1982-12-27 | 1984-07-07 | Shinagawa Rozai Kk | Applying method of tundish board |
-
2002
- 2002-06-14 FR FR0207384A patent/FR2840828B1/en not_active Expired - Fee Related
-
2003
- 2003-06-12 AU AU2003204668A patent/AU2003204668A1/en not_active Abandoned
- 2003-06-13 US US10/460,676 patent/US20040011500A1/en not_active Abandoned
- 2003-06-13 BR BR0302070-3A patent/BR0302070A/en not_active Application Discontinuation
- 2003-06-13 KR KR10-2003-0038203A patent/KR20030096078A/en not_active Application Discontinuation
- 2003-06-13 EP EP03291435A patent/EP1371433A1/en not_active Withdrawn
- 2003-06-13 JP JP2003169245A patent/JP2004034156A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4165026A (en) * | 1971-12-07 | 1979-08-21 | Foseco Trading A.G. | Tundish with expendable lining and easily removable nozzle |
| GB1522764A (en) * | 1975-06-25 | 1978-08-31 | Centre Rech Metallurgique | Metallurgical vessel |
| US4096976A (en) * | 1975-06-30 | 1978-06-27 | Daussan Et Compagnie | Vessels for transferring liquid metal having a removable insulating lining |
| GB1569970A (en) * | 1977-03-08 | 1980-06-25 | Metalaids Processes Ltd | Tundish lining |
| GB2085133A (en) * | 1980-10-14 | 1982-04-21 | London Scandinavian Metall | Refractory linings for metallurgical vessels |
| JPS59118253A (en) * | 1982-12-27 | 1984-07-07 | Shinagawa Rozai Kk | Applying method of tundish board |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 008, no. 238 (M - 335) 31 October 1984 (1984-10-31) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8546721B2 (en) | 2007-11-20 | 2013-10-01 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Seam position control for laser processing |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003204668A1 (en) | 2004-01-15 |
| FR2840828A1 (en) | 2003-12-19 |
| FR2840828B1 (en) | 2004-09-17 |
| BR0302070A (en) | 2004-08-17 |
| US20040011500A1 (en) | 2004-01-22 |
| JP2004034156A (en) | 2004-02-05 |
| KR20030096078A (en) | 2003-12-24 |
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