EP0277889A1 - Method for regulating the level of the contact line of the free metal surface with the continuous-casting mould in a vertical casting - Google Patents
Method for regulating the level of the contact line of the free metal surface with the continuous-casting mould in a vertical casting Download PDFInfo
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- EP0277889A1 EP0277889A1 EP88420009A EP88420009A EP0277889A1 EP 0277889 A1 EP0277889 A1 EP 0277889A1 EP 88420009 A EP88420009 A EP 88420009A EP 88420009 A EP88420009 A EP 88420009A EP 0277889 A1 EP0277889 A1 EP 0277889A1
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- circuit
- mold
- metal
- fraction
- ingot mold
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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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
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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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
Definitions
- the invention relates to a method for adjusting the level of the line of contact of the free surface of the metal with the ingot mold in a vertical flow of products of any cross-section.
- the French patent No. 2570340 of which the Applicant is proprietor teaches a level adjusting process of the line of contact of the free surface of the metal with the ingot mold characterized by the application to the liquid during solidification of a periodic magnetic field of variable intensity and direction substantially parallel to the axis of the ingot mold which is adapted intensity depending on the desired level.
- This process makes it possible to obtain a cortical layer of practically zero thickness, a smooth skin and a fine grain without the prior addition of a refining agent such as AT5B for example, and is very well suited in particular to aluminum-based products. of circular section such as billets.
- the value of the field applied to the metal is not, at a given instant, the same over the entire periphery of the metal but has differences on one or more fractions of said periphery.
- This modulation can be obtained, in particular, in three ways: - By modifying the distance between the electrical circuit and the ingot mold, knowing that this distance must be increased in front of the periphery fraction whose level is to be raised or decreased if the level is to be lowered.
- the distance which separates the circuit from the short sides of the ingot mold is increased and this increase can be from 1 to 2 times the distance which separates the circuit from the large sides, the latter distance being that which is fixed as the basis of operation during casting.
- this displacement is preferably by a height at most equal to half the natural height of the circuit.
- this displacement can be limited to the part of the circuit facing the short sides.
- This side instead of being straight may have one or more curves alternating or not with straight parts or only straight parts, one part is vertical and the other inclined. This inclination is preferably less than or equal to 45 degrees relative to the vertical and produced so as to distance the side of the mold.
- the invention also comprises an electrical circuit modular allowing to carry out the modifications of distance, the changes of position in height and the variations of shape of the profile.
- This circuit is characterized in that it is formed by a modular set of elongated, removable elements, adaptable to the format of the cast product, electrically connected to each other, except at one place in the circuit where there is a discontinuity between and 'other of which are placed pads for connection to a current source.
- these elements can be rectilinear or curved, of rectangular or square section, be placed in the same horizontal plane and their connections between them are such as they allow by placing them in different directions to form a contour similar to that of the poured product and by moving their ends relative to each other to obtain the proper distance.
- these elements can have the configuration described above with the difference that they are placed in at least two horizontal planes.
- the profile of the circuit In the case where it is desired to vary the shape of the profile of the circuit, it can be formed of elements of suitable profile and associated as before.
- a cooling system can be provided, for example by giving the elements a hollow shape so as to be able to circulate within them a coolant. .
- connection of the elements to each other can be obtained by any means known to those skilled in the art which makes it possible to make the circuit modular and extensible at will while maintaining a suitable electrical contact resistance between elements. It can be for example any connection system by screws and nuts placed at the ends of the elements which are provided with elongated openings and inside which the bodies of the screws can slide, or even any system of clamps, jacks, assemblies via shoulders, or open mortise and tenon.
- FIG 1 there is a mold (1) of rectangular section and a circuit (2) consisting of two elongated elements (3) which rest on the ends of the elements (4) provided with shoulders.
- the elements (4) can be moved according to the arrows (5) so as to increase the circuit-ingot mold distance on the short sides of the ingot mold by means of bolt-nut systems (6) arranged in elongated openings (7) placed at the ends of the elements (3).
- FIG. 3 it can be seen that the shoulder (10) produced on the element (4) is higher than in FIG. 2 so that the element (3) is located in a plane different from the element ( 4) to which it is connected by the bolt-nut system (6).
- the element (4) has on the side of its profile facing the ingot mold a vertical part (11) upwards and an oblique part (12) downwards.
- a rectangular ingot mold of dimensions 1050 mm x 460 mm was equipped with a circuit according to the invention comprising 4 copper elements of section 2000 mm2 of which two are 1177 mm long and the other two are 634 mm long.
- the short elements were equipped at their ends with shoulders and connected to the large bars as indicated in FIG. 2 so as to have a mold-long element distance equal to 20 mm and a mold-short element distance equal to 35 mm.
- the ends of the elements placed at one of the vertices of the rectangle thus formed were equipped with electrical supply areas and isolated from each other.
- the invention finds its application in obtaining cast products having a thin cortical layer, a fine grain and a regular skin.
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- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Microwave Amplifiers (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
- Manufacturing Of Electrical Connectors (AREA)
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Abstract
L'invention est relative à un procédé de réglage du niveau de la ligne de contact de la surface libre du métal avec la lingotière dans une coulée verticale continue de produits de section quelconque dans lequel on applique au métal liquide en cours de solidification, au moyen d'un circuit électrique (2), entourant la lingotière (1), un champ magnétique d'intensité variable et de direction sensiblement parallèle à l'axe de la lingotière et on adapte le champ en fonction du niveau souhaité. Elle est caractérisée en ce que l'on module le champ appliqué sur au moins une fraction de la périphérie du métal soit en modifiant la distance circuit-lingotière, soit en changeant la position en hauteur du circuit, soit en faisant varier la forme du profil du circuit. L'invention concerne également le circuit modulable permettant d'appliquer l'invention. Ce procédé permet de réduire l'épaisseur de la couche corticale, d'affiner le grain et de régulariser la peau des produits coulés.The invention relates to a method for adjusting the level of the line of contact of the free surface of the metal with the ingot mold in a continuous vertical casting of products of any cross section in which liquid metal is being solidified by means an electrical circuit (2), surrounding the mold (1), a magnetic field of variable intensity and direction substantially parallel to the axis of the mold and the field is adapted according to the desired level. It is characterized in that the field applied is modulated on at least a fraction of the periphery of the metal either by modifying the circuit-ingot mold distance, or by changing the height position of the circuit, or by varying the shape of the profile. of the circuit. The invention also relates to the modular circuit for applying the invention. This process makes it possible to reduce the thickness of the cortical layer, to refine the grain and to regulate the skin of the cast products.
Description
L'invention est relative à un procédé de réglage du niveau de la ligne de contact de la surface libre du métal avec la lingotière dans une coulée verticale de produits de section quelconque.The invention relates to a method for adjusting the level of the line of contact of the free surface of the metal with the ingot mold in a vertical flow of products of any cross-section.
Lors de la fabrication de semi-produits métallurgiques par coulée de métaux ferreux ou légers comme l'aluminium et ses alliages, l'homme de l'art cherche à obtenir des lingots, des billettes, des plaques, etc... ayant la meilleure homogénéité physique et chimique possible, ceci afin d'éviter l'apparition de certains défauts lors de la transformation ultérieure de ces produits en feuilles, fils, etc...During the manufacture of metallurgical semi-products by casting ferrous or light metals such as aluminum and its alloys, those skilled in the art seek to obtain ingots, billets, plates, etc. having the best physical and chemical homogeneity possible, this in order to avoid the appearance of certain defects during the subsequent transformation of these products into sheets, threads, etc.
Or, la plupart des procédé de coulée utilisés actuellement dans l'industrie donnent lieu, lors du passage du métal de l'état liquide à l'état solide, à la formation de défauts d'homogénéité plus ou moins importants, dus essentiellement à des conditions de refroidissement différentes d'un point à l'autre des produits coulés. C'est ainsi que dans la coulée en lingotière à passage vertical où le métal est successivement refroidi indirectement par l'intermédiare de la lingotière, puis directement par une lame d'eau, on constate la présence sur les semi-produits d'une couche externe dite "couche corticale primair". Cette couche dont la structure et la composition diffèrent de celles de la partie interne du semi-produit, résulte du refroidissement indirect du métal au contact de la lingotière.However, most of the casting methods currently used in industry give rise, during the transition of the metal from the liquid state to the solid state, to the formation of more or less significant homogeneity defects, essentially due to different cooling conditions from one point to another of the cast products. Thus in casting in a vertical passage ingot mold where the metal is successively indirectly cooled by the intermediary of the ingot mold, then directly by a sheet of water, we observe the presence on the semi-finished products of a layer external called "primary cortical layer". This layer, the structure and composition of which differ from that of the internal part of the semi-finished product, results from the indirect cooling of the metal in contact with the ingot mold.
Pour supprimer cette couche, on a donc cherché soit à éviter tout contact du métal avec la lingotière comme dans la coulée électromagnétique objet du brevet français 1 509 962, soit à limiter la hauteur de contact avec la lingotière.To remove this layer, we therefore sought either to avoid any contact of the metal with the ingot mold as in the electromagnetic casting object of French patent 1 509 962, or to limit the contact height with the ingot mold.
Dans le cadre de cette limitation, le brevet français no 2 570 340 dont la demanderesse est titulaire, enseigne un procédé de réglage du niveau de la ligne de contact de la surface libre du métal avec la lingotière caractérisé par l'application au liquide en cours de solidification d'un champ magnétique périodique d'intensité variable et de direction sensiblement parallèle à l'axe de la lingotière dont on adapte l'intensité en fonction du niveau souhaité.In the context of this limitation, the French patent No. 2570340 of which the Applicant is proprietor, teaches a level adjusting process of the line of contact of the free surface of the metal with the ingot mold characterized by the application to the liquid during solidification of a periodic magnetic field of variable intensity and direction substantially parallel to the axis of the ingot mold which is adapted intensity depending on the desired level.
Ce procédé permet d'obtenir une couche corticald d'épaisseur pratiquement nulle, une peau lisse et un grain fin sans ajout préalable d'un agent affinant tel que l'AT5B par exemple, et convient très bien notamment aux produits à base d'aluminium de section circulaire tels que les billettes.This process makes it possible to obtain a cortical layer of practically zero thickness, a smooth skin and a fine grain without the prior addition of a refining agent such as AT5B for example, and is very well suited in particular to aluminum-based products. of circular section such as billets.
Mais dans son application aux produits de section autre que circulaire et plus particulièrement aux plaques rectangulaires de grandes dimensions, on constate que le champ magnétique n'a pas le même effet sur toute la périphérie du produit et ce en se plaçant dans les mêmes conditions de coulée que les billettes, c'est-à-dire en donnant au circuit électrique créateur du champ un contour équidistant de celui de la lingotière, une forme identique et une même hauteur. Ainsi, cet effet est exacerbé sur les petits côtés du produit c'està-dire que ceux-ci ont tendance à se décoller de la paroi de la lingotière avant les grands côtés d'où un niveau de la ligne de contact plus bas en regard des petits côtés. Or, comme on l'a exposé dans le brevet français 2 570 304, l'épaisseur de la couche corticale des produits coulés est fonction de la position de ce niveau. Il en résulte donc que l'application de ce procédé à des produits de section quelconque conduit à une couche corticale d'épaisseur variable et par suite à un produit hétérogène.But in its application to products of section other than circular and more particularly to rectangular plates of large dimensions, it is found that the magnetic field does not have the same effect on the entire periphery of the product and this when placed under the same conditions of casting as the billets, that is to say by giving the electric circuit creating the field a contour equidistant from that of the mold, an identical shape and the same height. Thus, this effect is exacerbated on the short sides of the product, that is to say that they tend to peel off the wall of the mold before the long sides, hence a lower level of the contact line opposite. short sides. However, as explained in French patent 2,570,304, the thickness of the cortical layer of the cast products is a function of the position of this level. It therefore follows that the application of this process to products of any cross section leads to a cortical layer of variable thickness and consequently to a heterogeneous product.
C'est pour remédier à cette dissymétrie non seulement de l'épaisseur de la couche corticale mais aussi de la finesse de grain et de la régularité de la peau que la demanderesse a conçu un procédé qui, dans le cadre de son brevet cité plus haut, est caractérisé en ce que l'on module le champ appliqué sur au moins une fraction de la périphérie du métal.It is to remedy this asymmetry not only of the thickness of the cortical layer but also of the fineness of grain and the regularity of the skin that the applicant has devised a process which, within the framework of its patent cited above. , is characterized in that the field applied is modulated on at least a fraction of the periphery of the metal.
Ainsi, à la différence du brevet précédent où à un instant donné le champ appliqué était le même sur toute la périphérie du métale et pouvait varier dans le temps dans son ensemble pour régler le niveau à la hauteur voulue, dans la présente invention, la valeur du champ appliqué au métal n'est pas, à un instant donnée, la même sur toute la périphérie du métal mais présente des différences sur une ou plusieurs fractions de ladite périphérie.Thus, unlike the previous patent where at a given time the applied field was the same over the entire periphery of the metal and could vary over time as a whole to adjust the level to the desired height, in the present invention, the value of the field applied to the metal is not, at a given instant, the same over the entire periphery of the metal but has differences on one or more fractions of said periphery.
Cette modulation peut être obtenue, en particulier, de trois manières:
- par modification de la distance entre le circuit électrique et la lingotière sachant que cette distance doit être augmentée face à la fraction de périphérie dont on veut élever le niveau ou diminuée si l'on veut au contraire abaisser le niveau.This modulation can be obtained, in particular, in three ways:
- By modifying the distance between the electrical circuit and the ingot mold, knowing that this distance must be increased in front of the periphery fraction whose level is to be raised or decreased if the level is to be lowered.
Dans le cas d'une lingotière de section rectangulaire, de préférence, on augmente la distance qui sépare le circuit des petits côtés de la lingotière et cette augmentation peut être de 1 à 2 fois la distance qui sépare le circuit des grands côtés, cette dernière distance étant celle qu'on s'est fixée comme base de fonctionnement durant la coulée.
- par changement de la position en hauteur du circuit par rapport à la lingotière, c'est-à-dire qu'une hauteur optimale ayant été déterminée, hauteur qui donne la ligne de contact avec la lingotière la plus basse, toutes choses égales par ailleurs, on déplace vers le haut ou vers le bas, la partie du circuit faisant face à la fraction de périphérie qu'on veut élever. ce déplacement est de préférence d'une hauteur au plus égale à la moitié de la hauteur propre du circuit. Dans le cas d'une lingotière de section rectangulaire, ce déplacement peut être limité à la partie du circuit faisant face aux petits côtés.
- par variation de la forme du profil du circuit et de préférence en se limitant au côté du profil placé en regard de la lingotière. Ce côté au lieu d'être rectiligne peut présenter une ou plusieurs courbes alternatn ou non avec des parties droites ou uniquement des parties droites dont une partie est verticale et une autre inclinée. Cette inclinaison est de préférence inférieure ou égale à 45 degrés par rapport à la verticale et réalisée de manière à éloigner le côté de la lingotière.In the case of an ingot mold of rectangular section, preferably, the distance which separates the circuit from the short sides of the ingot mold is increased and this increase can be from 1 to 2 times the distance which separates the circuit from the large sides, the latter distance being that which is fixed as the basis of operation during casting.
- by changing the height position of the circuit relative to the ingot mold, that is to say that an optimal height having been determined, height which gives the line of contact with the lowest ingot mold, all other things equal by elsewhere, we move up or down, the part of the circuit facing the periphery fraction that we want to raise. this displacement is preferably by a height at most equal to half the natural height of the circuit. In the case of an ingot mold of rectangular section, this displacement can be limited to the part of the circuit facing the short sides.
- By variation of the shape of the profile of the circuit and preferably by limiting itself to the side of the profile placed opposite the mold. This side instead of being straight may have one or more curves alternating or not with straight parts or only straight parts, one part is vertical and the other inclined. This inclination is preferably less than or equal to 45 degrees relative to the vertical and produced so as to distance the side of the mold.
Dans le cas d'une lingotière rectantulaire, on adopte, de préférence, la solution consistant à avoir un circuit dont le côté du profil faisant face à la lingotière est rectiligne et vertical en regard des grands côtés; en regard des petits côtés de la lingotière, le côté du profil est aussi rectiligne mais présente une partie verticale vers le haut et une partie inclinée vers le bas.In the case of a rectangular mold, it is preferable to adopt the solution consisting in having a circuit whose side of the profile facing the ingot mold is straight and vertical opposite the long sides; facing the short sides of the mold, the side of the profile is also straight but has a vertical part upwards and a part inclined downwards.
Mais on peut également utiliser un circuit dans lequel le côté du profil est vertical en regard des petits côtés de la lingotière alors qu'en regard des grands côtés, il présente une partie inclinée vers le haut et une partie verticale vers le bas.However, it is also possible to use a circuit in which the side of the profile is vertical opposite the short sides of the ingot mold whereas, opposite the long sides, it has a part inclined upwards and a vertical part downwards.
Ces trois manières peuvent être utilisées séparément mais également en combinaison entre elles, ou avec d'autres moyens tel que celui consistant à augmenter la hauteur de la lingotière sur les petits côtés.These three ways can be used separately but also in combination with one another, or with other means such as that of increasing the height of the mold on the short sides.
Il est évident que les bobines constituées par un fil de cuivre émaillé telles que celles décrites dans le brevet français no 2 570 304 se prêtent difficilement à la réalisation du procédé selon l'invention C'est pourquoi l'invention comporte également un circuit électrique modulable permettant de réaliser les modifications de distance, les changements de position en hauteur et les variations de forme du profil.It is obvious that the coils consist of an enamelled copper wire such as those described in French Patent No. 2,570,304 are not ideal for carrying out the method according to the invention Therefore the invention also comprises an electrical circuit modular allowing to carry out the modifications of distance, the changes of position in height and the variations of shape of the profile.
Ce circuit est caractérisé en ce qu'il est formé par un ensemble modulable d'éléments allongés, amovibles, adaptables au format du produit coulé, reliés électriquement entre eux, sauf en un endroit du circuit où se trouve disposée une discontinuité de part et d'autre de laquelle sont placées des plages de raccordement à une source de courant.This circuit is characterized in that it is formed by a modular set of elongated, removable elements, adaptable to the format of the cast product, electrically connected to each other, except at one place in the circuit where there is a discontinuity between and 'other of which are placed pads for connection to a current source.
Dans le cas où ou veut seulement modifier la distance circuit-lingotière, ces éléments peuvent être rectilignes ou courbes, de section rectangulaire ou carrée, être placées dans un même plan horizontal et leurs liaisons entre eux sont tells qu'elless permettent en les plaçant dans des directions différentes de former un contour semblable à celui du produit coulé et par déplacement de leurs extrémités les unes par rapport aux autres d'obtenir la distance convenable.In the case where or only wants to modify the circuit-ingot mold distance, these elements can be rectilinear or curved, of rectangular or square section, be placed in the same horizontal plane and their connections between them are such as they allow by placing them in different directions to form a contour similar to that of the poured product and by moving their ends relative to each other to obtain the proper distance.
Dans le cas où on veut seulement changer la position en hauteur du circuit, ces éléments peuvent avoir la configuration décrite ci-dessus avec la différence qu'ils sont placés dans au moins deux plans horizontaux.In the case where we only want to change the height position of the circuit, these elements can have the configuration described above with the difference that they are placed in at least two horizontal planes.
Dans le cas où on veut faire varier la forme du profil du circuit, celui-ci peut être formé d'éléments de profil convenable et associés comme précédemment.In the case where it is desired to vary the shape of the profile of the circuit, it can be formed of elements of suitable profile and associated as before.
Suivant l'intensité du courant électrique qui circule dans ces éléments et de l'effet JOULE qui en résulte, on peut prévoir un système de refroidissement en donnant par exemple aux éléments une forme creuse de manière à pouvoir faire circuler en leur sein un liquide réfrigérant.Depending on the intensity of the electric current flowing in these elements and the resulting JOULE effect, a cooling system can be provided, for example by giving the elements a hollow shape so as to be able to circulate within them a coolant. .
Le raccordement des éléments entre eux peut être obtenu par tout moyen connu de l'homme de l'art qui permette de rendre le circuit modulable et extensible à volonté tout en maintenant une résistance électrique de contact entre éléments convenable. Ce peut être par exemple tout système de raccordement par vis et écrous placé aux extrémités des éléments qui sont munies d'ouvertures de forme allongée et à l'intérieur desquelles peuvent coulisser les corps de vis, ou encore tout système de pinces, de verins, d'assemblages par l'intermédiaire d'épaulements, ou de mortaise ouverte et de tenon.The connection of the elements to each other can be obtained by any means known to those skilled in the art which makes it possible to make the circuit modular and extensible at will while maintaining a suitable electrical contact resistance between elements. It can be for example any connection system by screws and nuts placed at the ends of the elements which are provided with elongated openings and inside which the bodies of the screws can slide, or even any system of clamps, jacks, assemblies via shoulders, or open mortise and tenon.
L'invention sera mieux comprise à l'aide des dessins ci-joints qui représentent:
- . Figure 1, une vue en coupe horizontale d'un circuit contenant une lingotière de section rectangulaire et dans lequel on veut faire varier la distance circuit-lingotière.
- . Figure 2, une vue en perspective du détail de raccordement entre deux éléments suivant 1.
- . Figure 3, une vue en perspective du détail du raccordement entre deux éléments dans le cas où on veut changer la position en hauteur de certains éléments du circuit.
- . Figure 4, une vue en perspective du détail du raccordement entre deux éléments dont on fait varier le profil d'un des éléments.
- . Figure 1, a horizontal sectional view of a circuit containing a mold of rectangular section and in which we want to vary the distance circuit-mold.
- . Figure 2, a perspective view of the connection detail between two elements according to 1.
- . Figure 3, a perspective view of the detail of the connection between two elements in the case where we want to change the height position of some elements of the circuit.
- . Figure 4, a perspective view of the detail of the connection between two elements whose profile of one of the elements is varied.
Sur la figure 1, on distingue une lingotière (1) de section rectangulaire et un circuit (2) constitué par deux éléments allongés (3) qui reposent sur les extrémités des éléments (4) munis d'épaulements. Les éléments (4) peuvent être déplacés suivant les flèches (5) de manière à augmenter la distance circuit-lingotière sur les petits côtés de la lingotière au moyen de systèmes boulon-écrou (6) disposés dans des ouvertures (7) de forme allongée placées aux extrémités des éléments (3).In Figure 1, there is a mold (1) of rectangular section and a circuit (2) consisting of two elongated elements (3) which rest on the ends of the elements (4) provided with shoulders. The elements (4) can be moved according to the arrows (5) so as to increase the circuit-ingot mold distance on the short sides of the ingot mold by means of bolt-nut systems (6) arranged in elongated openings (7) placed at the ends of the elements (3).
Les extrémités en regard d'un élément (3) et d'un élément (4) sont isolées éléctriquement et munies de plages (8) de liaison à la source de courant.The opposite ends of an element (3) and an element (4) are electrically insulated and provided with pads (8) for connection to the current source.
Sur la figure 2, on voit une portion d'élément (4) munie d'un épaulement (9) sur lequel repose l'éxtrémité d'un élément (3), l'un et l'autre étant raccordées au moyen d'un système boulon-écrou (6). L'épaulement est réalisé de manière que les éléments (3) et (4) de même section soient situés dans un même plan horizontal.In Figure 2, we see a portion of element (4) provided with a shoulder (9) on which rests the end of an element (3), both being connected by means of a bolt-nut system (6). The shoulder is made so that the elements (3) and (4) of the same section are located in the same horizontal plane.
Sur la figure 3, on voit que l'épaulement (10) réalisé sur l'élément (4) est plus haut que sur la figure 2 de manière que l'élément (3) soit situé dans un plan différent de l'élément (4) auquel il est raccordé par le système boulon-écrou (6).In FIG. 3, it can be seen that the shoulder (10) produced on the element (4) is higher than in FIG. 2 so that the element (3) is located in a plane different from the element ( 4) to which it is connected by the bolt-nut system (6).
Sur la figure 4, l'élément (4) présente sur le côté de son profil faisant face à la lingotière une partie verticale (11) vers le haut et une partie oblique (12) vers le bas.In FIG. 4, the element (4) has on the side of its profile facing the ingot mold a vertical part (11) upwards and an oblique part (12) downwards.
L'invention peut être illustré à l'aide de l'exemple d'application suivant :The invention can be illustrated using the following example of application:
Une lingotière rectangulaire de dimensions 1050 mm x 460 mm a été équipée d'un circuit selon l'invention comprenant 4 éléments en cuivre de section 2000 mm² dont deux de longueur 1177 mm et les deux autres de longueur 634 mm.A rectangular ingot mold of dimensions 1050 mm x 460 mm was equipped with a circuit according to the invention comprising 4 copper elements of section 2000 mm² of which two are 1177 mm long and the other two are 634 mm long.
Les éléments courts étaient équipés à leurs extrémités d'épaulements et raccordés aux grandes barres comme il est indiqué sur la figure 2 de manière à avoir une distance lingotière-élément long égale à 20 mm et une distance lingotière-élément court égale à 35 mm.The short elements were equipped at their ends with shoulders and connected to the large bars as indicated in FIG. 2 so as to have a mold-long element distance equal to 20 mm and a mold-short element distance equal to 35 mm.
Les extrémités des éléments placés à l'un des sommets du rectangle ainsi formé étaient équipées de plages d'alimentation électrique et isolées l'une de l'autre.The ends of the elements placed at one of the vertices of the rectangle thus formed were equipped with electrical supply areas and isolated from each other.
On a coulé au moyen de cette lingotière une plaque en alliage d'aluminium du type 1050 suivant les normes de l'Aluminium Association alors que la tension aux bornes du circuit était de 5,28 Volts. Le produit obtenu était parfaitement homogène.An aluminum alloy plate of the type 1050 according to the standards of the Aluminum Association was poured by means of this ingot mold while the voltage at the terminals of the circuit was 5.28 Volts. The product obtained was perfectly homogeneous.
L'invention trouve son application dans l'obtention de produits coulés ayant une couche corticale de faible épaisseur, un grain fin et une peau régulière.The invention finds its application in obtaining cast products having a thin cortical layer, a fine grain and a regular skin.
Claims (19)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT88420009T ATE55564T1 (en) | 1987-01-15 | 1988-01-13 | METHOD OF CONTROLLING THE LEVEL OF THE LINE OF CONTACT OF THE FREE METAL SURFACE WITH THE CONTINUOUS CASTING MOLD IN A VERTICAL CONTINUOUS CASTING. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8700815A FR2609656B1 (en) | 1987-01-15 | 1987-01-15 | METHOD OF ADJUSTING THE CONTACT LINE OF THE FREE METAL SURFACE WITH THE LINGOTIERE IN A VERTICAL CAST OF PRODUCTS OF ANY SECTION |
| FR8700815 | 1987-01-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0277889A1 true EP0277889A1 (en) | 1988-08-10 |
| EP0277889B1 EP0277889B1 (en) | 1990-08-16 |
Family
ID=9347227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88420009A Expired - Lifetime EP0277889B1 (en) | 1987-01-15 | 1988-01-13 | Method for regulating the level of the contact line of the free metal surface with the continuous-casting mould in a vertical casting |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US4848441A (en) |
| EP (1) | EP0277889B1 (en) |
| JP (1) | JPS63180352A (en) |
| AT (1) | ATE55564T1 (en) |
| AU (1) | AU592247B2 (en) |
| CA (1) | CA1329978C (en) |
| DE (1) | DE3860451D1 (en) |
| ES (1) | ES2016678B3 (en) |
| FR (1) | FR2609656B1 (en) |
| GR (1) | GR3000723T3 (en) |
| NO (1) | NO169758C (en) |
| NZ (1) | NZ223143A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0807478A1 (en) * | 1996-05-13 | 1997-11-19 | DANIELI & C. OFFICINE MECCANICHE S.p.A. | Continuous casting method and apparatus with pulsating electromagnetic field |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6341642B1 (en) | 1997-07-01 | 2002-01-29 | Ipsco Enterprises Inc. | Controllable variable magnetic field apparatus for flow control of molten steel in a casting mold |
| CA2242037C (en) * | 1997-07-01 | 2004-01-27 | Ipsco Inc. | Controllable variable magnetic field apparatus for flow control of molten steel in a casting mold |
| US8070130B2 (en) * | 2008-01-22 | 2011-12-06 | Fisher Controls International, Llc | Apparatus to bias valve closure members |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1095999B (en) * | 1953-07-30 | 1960-12-29 | Boehler & Co Ag Geb | Process for continuous casting, especially of difficult-to-melt metals |
| LU83988A1 (en) * | 1982-03-09 | 1983-11-17 | Arbed | CONTINUOUS CASTING LINGOTIERES |
| FR2570304A1 (en) * | 1984-09-19 | 1986-03-21 | Cegedur | METHOD FOR ADJUSTING THE LEVEL OF THE CONTACT LINE OF THE FREE METAL SURFACE WITH THE LINGOTIERE IN A VERTICAL CASTING |
| EP0201069A1 (en) * | 1985-05-10 | 1986-11-12 | Erik A. Olsson | Process for continuously casting metallic products |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2397251A1 (en) * | 1977-07-12 | 1979-02-09 | Anvar | METHOD AND DEVICE FOR DIRECTING, IN THE ABSENCE OF WALLS, LIQUID METALLIC VEINS, IN PARTICULAR FOR CENTERING, GUIDING OR CHECKING THEIR CIRCULAR SHAPE |
| CH625441A5 (en) * | 1977-12-05 | 1981-09-30 | Alusuisse | |
| US4321959A (en) * | 1979-07-11 | 1982-03-30 | Olin Corporation | Electromagnetic casting shape control by differential screening and inductor contouring |
| FR2530511B1 (en) * | 1982-07-23 | 1985-07-05 | Cegedur | PROCESS FOR CASTING METALS IN WHICH MAGNETIC FIELDS ARE OPERATED |
| US4512386A (en) * | 1982-11-12 | 1985-04-23 | Swiss Aluminium Ltd. | Adjustable mold for electromagnetic casting |
| US4606397A (en) * | 1983-04-26 | 1986-08-19 | Olin Corporation | Apparatus and process for electro-magnetically forming a material into a desired thin strip shape |
| JPS613640A (en) * | 1984-06-18 | 1986-01-09 | Sumitomo Electric Ind Ltd | Continuous metal casting method |
| JPS61129261A (en) * | 1984-11-28 | 1986-06-17 | Nippon Steel Corp | Production of continuously cast steel ingot having less surface defect |
| JPS61206550A (en) * | 1985-03-12 | 1986-09-12 | Nippon Steel Corp | Continuous casting method for steel |
| FR2595597B1 (en) * | 1986-03-13 | 1988-04-29 | Cegedur | DEVICE FOR ADJUSTING THE LEVEL OF THE CONTACT LINE OF THE FREE METAL SURFACE WITH THE LINGOTIERE IN A VERTICAL CAST |
| FR2595596B1 (en) * | 1986-03-13 | 1988-04-29 | Cegedur | LINGOTIERE FOR ADJUSTING THE NEXT LEVEL IN WHICH IT IS IN CONTACT WITH THE FREE METAL SURFACE IN A VERTICAL CAST |
-
1987
- 1987-01-15 FR FR8700815A patent/FR2609656B1/en not_active Expired
-
1988
- 1988-01-11 NZ NZ223143A patent/NZ223143A/en unknown
- 1988-01-12 US US07/143,010 patent/US4848441A/en not_active Expired - Lifetime
- 1988-01-13 ES ES88420009T patent/ES2016678B3/en not_active Expired - Lifetime
- 1988-01-13 DE DE8888420009T patent/DE3860451D1/en not_active Expired - Fee Related
- 1988-01-13 AT AT88420009T patent/ATE55564T1/en not_active IP Right Cessation
- 1988-01-13 JP JP63005672A patent/JPS63180352A/en active Granted
- 1988-01-13 EP EP88420009A patent/EP0277889B1/en not_active Expired - Lifetime
- 1988-01-14 CA CA000556533A patent/CA1329978C/en not_active Expired - Fee Related
- 1988-01-14 NO NO880152A patent/NO169758C/en unknown
- 1988-01-14 AU AU10273/88A patent/AU592247B2/en not_active Ceased
-
1990
- 1990-08-17 GR GR90400296T patent/GR3000723T3/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1095999B (en) * | 1953-07-30 | 1960-12-29 | Boehler & Co Ag Geb | Process for continuous casting, especially of difficult-to-melt metals |
| LU83988A1 (en) * | 1982-03-09 | 1983-11-17 | Arbed | CONTINUOUS CASTING LINGOTIERES |
| FR2570304A1 (en) * | 1984-09-19 | 1986-03-21 | Cegedur | METHOD FOR ADJUSTING THE LEVEL OF THE CONTACT LINE OF THE FREE METAL SURFACE WITH THE LINGOTIERE IN A VERTICAL CASTING |
| EP0201069A1 (en) * | 1985-05-10 | 1986-11-12 | Erik A. Olsson | Process for continuously casting metallic products |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0807478A1 (en) * | 1996-05-13 | 1997-11-19 | DANIELI & C. OFFICINE MECCANICHE S.p.A. | Continuous casting method and apparatus with pulsating electromagnetic field |
| US5988261A (en) * | 1996-05-13 | 1999-11-23 | Danieli & C. Officine Meccaniche Spa | Continuous casting method and relative crystalliser for continuous casting |
Also Published As
| Publication number | Publication date |
|---|---|
| NO169758B (en) | 1992-04-27 |
| NZ223143A (en) | 1990-11-27 |
| JPS63180352A (en) | 1988-07-25 |
| US4848441A (en) | 1989-07-18 |
| NO169758C (en) | 1992-08-05 |
| NO880152D0 (en) | 1988-01-14 |
| ES2016678B3 (en) | 1990-11-16 |
| AU1027388A (en) | 1988-07-21 |
| DE3860451D1 (en) | 1990-09-20 |
| CA1329978C (en) | 1994-06-07 |
| FR2609656B1 (en) | 1989-03-24 |
| NO880152L (en) | 1988-07-18 |
| FR2609656A1 (en) | 1988-07-22 |
| ATE55564T1 (en) | 1990-09-15 |
| AU592247B2 (en) | 1990-01-04 |
| GR3000723T3 (en) | 1991-10-10 |
| JPH0569629B2 (en) | 1993-10-01 |
| EP0277889B1 (en) | 1990-08-16 |
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