EP0248742A1 - Process and device for cleaning the tap hole of a steel furnace provided with an extended bottom tap hole - Google Patents
Process and device for cleaning the tap hole of a steel furnace provided with an extended bottom tap hole Download PDFInfo
- Publication number
- EP0248742A1 EP0248742A1 EP87420119A EP87420119A EP0248742A1 EP 0248742 A1 EP0248742 A1 EP 0248742A1 EP 87420119 A EP87420119 A EP 87420119A EP 87420119 A EP87420119 A EP 87420119A EP 0248742 A1 EP0248742 A1 EP 0248742A1
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- EP
- European Patent Office
- Prior art keywords
- pouring orifice
- cutting tool
- edge
- cutting
- pouring
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/19—Arrangements of devices for discharging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/15—Tapping equipment; Equipment for removing or retaining slag
Definitions
- the method and the device according to the invention relate to the cleaning of the pouring orifice of a steel arc furnace, comprising a lateral zone equipped with a pouring orifice from the bottom.
- Such ovens include, in the vicinity of the steel melting zone, a pouring zone, arranged laterally, and provided with a pouring orifice which opens out below the furnace.
- the casting of such an oven is carried out by tilting the oven towards the side of this casting zone, the metal then flowing very quickly, after opening the valve closing the pouring orifice, in a pocket located below. After casting, the oven is returned to its initial position and the bag is removed.
- casting residues form protuberances which remain attached to the outer annular edge of the casting aperture protrusions which must be removed before closing the shutter valve of the casting aperture for the next use of the furnace .
- the means used, in the usual way, to remove these growths which require time to be implemented, such as steel bars provided with cutting ends are not very effective and tend to damage the refractory lining of this orifice. casting and all the more so as these growths have time to cool.
- the internal radiation emitted by this orifice does not facilitate this cleaning work.
- This method and this device generally apply to steel furnaces comprising a lateral pouring zone provided with a bottom pouring orifice.
- a cutting tool is passed, below this orifice, so that the cutting edge of this tool moves in a plane substantially parallel to the plane tangent to the outer annular edge of this orifice, the closest possible from this edge, the length of this cutting edge and its course being determined so that it completely crosses the space which is in front of the pouring orifice.
- the length of the cutting edge is at least equal to the outside diameter of the annular edge of the pouring orifice.
- the cutting tool is passed in front of the pouring orifice less than 30 seconds and preferably of the order of 10 seconds after the completion of the casting.
- the device which is also the subject of the invention is used to remove the protuberances formed on the outer annular edge of the pouring orifice.
- the cutting tool provided with a cutting edge which has just been described, is fixed to one end of an arm, the other end of which is secured to a control rod mounted in rotation on bearings.
- the axis of this rod is substantially perpendicular to the plane tangent to the outer annular edge of the pouring orifice and the cutting tool is fixed to the arm, so that, as has been said above, its cutting edge is in a plane parallel to said tangent plane and as close as possible to it.
- An operating means makes it possible to rotate the control rod, thereby driving the arm which carries the cutting tool, so that the cutting edge of the latter completely crosses the space which is in front of the pouring orifice. .
- the cutting tool cuts the protuberances which adhere to the annular edge of the pouring orifice and extend downwards the plane in which the cutting edge of this cutting tool moves.
- an adjustment means makes it possible to adjust the distance between the cutting plane and the plane tangent to the outer annular edge of the casting orifice so that the cutting edge of the cutting tool passes just below the orifice. without hitting its annular edge.
- the means for operating the control rod is at least one actuator which makes it possible to rotate this rod by the desired angle so that the cutting tool cuts through the protuberances fixed to the annular edge of the pouring orifice, and which also allows the same cutting tool to return to its starting position.
- At least the cutting edge of the preferably bevelled cutting tool is made of any material suitable for cutting out protuberances formed from such solid residues.
- It can be made of ordinary steel or for example of tool steel, or of stainless or refractory steel. It may also include added cutting parts.
- Figure 1 is a schematic top view of a steel arc furnace (1) with three electrodes (2) having a lateral casting zone (3).
- This lateral zone equipped like the melting zone with a cover, comprises a pouring orifice (4) visible in section in FIG. 2.
- a partial section of the outer envelope (5) reveals the lining. as a refractory (6) which surrounds the pouring orifice (4).
- the annular outer edge (7) of this orifice is of revolution about the axis (X1-X1).
- the level of the steel is above the level of the inlet (8) of the pouring orifice (4) this orifice being filled with refractory powder for protect the closing valve of said orifice until the moment of actual casting. It is only at the time of pouring that the furnace is tilted so that the liquid steel flows quickly after opening the valve closing the pouring orifice in a pocket placed below. The oven is then returned to its initial position. It is then observed that casting residues, consisting of small quantities of steel and slag, solidified during cooling, remain attached to the outer annular edge (7) of the casting orifice.
- This tool (9) is a kind of knife, as shown in FIG. 3, the cutting edge (10) of which is in a plane parallel to the plane tangent to the annular edge (7) of the pouring orifice. The distance between these two planes is as small as possible, so that the growths can be cut as close as possible to the annular edge (7) to which they are attached.
- the cutting tool (9) is fixed to an arm (11) rotatably mounted around the axis (X2-X2) of the control rod (12).
- This axis (X2-X2) is perpendicular to the plane tangent to the annular edge (7).
- the control rod (12) is rotatably mounted on two bearings (13-14) fixed to the wall (5) of the oven. This rotation is caused by an operating means constituted by a double-acting jack (15), the body of which is connected by a joint, in a known manner to the wall (5) of the furnace and the rod of which is connected by another articulation, in a manner also known to a lever (16) mounted at a right angle on the control rod (12) so as to be able to drive it in rotation.
- the angular position and the length of the lever (16), the stroke of the jack (15), the angular position and the length of the arm (11), are determined so that the actuation of the jack (15) drives the arm ( 11) which moves in the direction of the arrow (F) the cutting tool from its starting position shown in (9) to its end of stroke position shown in dashes in (17).
- the cutting edge (10) cuts all the growths which it meets which extend downwards, the plane in which it moves.
- the length of the arm (11) is such that the cutting edge (10) passes in front of the pouring orifice (4) over its entire section.
- the length of this cutting edge is at least equal to the diameter of the pouring orifice (4) and preferably greater than this diameter.
- the length of the cutting edge (10) is greater than the outside diameter (D) of the annular edge (7) of the pouring orifice (4) as seen in FIG. 3.
- D outside diameter
- the cutting tool does not cause damage to the refractory material which constitutes the annular edge (7) of the pouring orifice.
- the cutting tool is then returned to its initial position.
- the cutting tool is made of beveled ordinary steel. Many other embodiments of the device and method according to the invention can be envisaged which do not depart from the field of the latter.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Cleaning In General (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Detergent Compositions (AREA)
- Processing Of Solid Wastes (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Charging Or Discharging (AREA)
Abstract
Description
Le procédé et le dispositif suivant l'invention concernent le nettoyage de l'orifice de coulée d'un four à arc d'aciérie, comportant une zone latérale équipée d'un orifice de coulée par le fond. De tels fours comportent au voisinage de la zone de fusion de l'acier une zone de coulée, disposée latéralement, et munie d'un orifice de coulée qui débouche au dessous du four. La coulée d'un tel four est réalisée en inclinant le four du côté de cette zone de coulée, le métal s'écoulant alors très rapidement, après ouverture du clapet de fermeture de l'orifice de coulée, dans une poche située au dessous. Après coulée on ramène le four à sa position initiale et on enlève la poche. On constate alors que des résidus de coulée forment des excroissances qui restent accrochées au bord annulaire extérieur de l'orifice de coulée excroissances qu'il faut enlever avant de refermer le clapet de fermeture de l'orifice de coulée pour l'utilisation suivante du four. Les moyens utilisés, de façon habituelle, pour enlever ces excroissances qui demandent du temps pour être mis en oeuvre, tels que des barres d'acier munies d'extrémités coupantes ne sont pas très efficaces et tendent à endommager le garnissage réfractaire de cet orifice de coulée et ceci d'autant plus que ces excroissances ont le temps de se refroidir. De plus le rayonnement interne, émis par cet orifice, ne facilite pas ce travail de nettoyage.The method and the device according to the invention relate to the cleaning of the pouring orifice of a steel arc furnace, comprising a lateral zone equipped with a pouring orifice from the bottom. Such ovens include, in the vicinity of the steel melting zone, a pouring zone, arranged laterally, and provided with a pouring orifice which opens out below the furnace. The casting of such an oven is carried out by tilting the oven towards the side of this casting zone, the metal then flowing very quickly, after opening the valve closing the pouring orifice, in a pocket located below. After casting, the oven is returned to its initial position and the bag is removed. It is then found that casting residues form protuberances which remain attached to the outer annular edge of the casting aperture protrusions which must be removed before closing the shutter valve of the casting aperture for the next use of the furnace . The means used, in the usual way, to remove these growths which require time to be implemented, such as steel bars provided with cutting ends are not very effective and tend to damage the refractory lining of this orifice. casting and all the more so as these growths have time to cool. In addition, the internal radiation emitted by this orifice does not facilitate this cleaning work.
On a donc recherché la possibilité d'enlever les excroissances formées par ces résidus de coulée de façon rapide et efficace sans endommager le garnissage réfractaire.We therefore sought the possibility of removing the protuberances formed by these casting residues quickly and efficiently without damaging the refractory lining.
Le procédé et le dispositif qui font l'objet de l'invention apportent à ce problème une solution particulièrement satisfaisante.The method and the device which are the subject of the invention provide a particularly satisfactory solution to this problem.
Ce procédé et ce dispositif s'appliquent d'une façon générale aux fours d'aciérie comportant une zone de coulée latérale munie d'un orifice de coulée par le fond. Dans ce procédé, on fait passer un outil tranchant, au dessous de cet orifice, de façon que le bord de coupe de cet outil se déplace dans un plan sensiblement parallèle au plan tangent au bord annulaire extérieur de cet orifice, le plus près possible de ce bord, la longueur de ce bord de coupe et son parcours étant déterminés de façon qu'il traverse complètement l'espace qui se trouve devant l'orifice de coulée. De préférence la longueur du bord de coupe est au moins égale au diamètre extérieur du bord annulaire de l'orifice de coulée. Avantageusement on fait passer l'outil tranchant devant l'orifice de coulée moins de 30 secondes et de préférence de l'ordre de 10 secondes après l'achèvement de la coulée.This method and this device generally apply to steel furnaces comprising a lateral pouring zone provided with a bottom pouring orifice. In this method, a cutting tool is passed, below this orifice, so that the cutting edge of this tool moves in a plane substantially parallel to the plane tangent to the outer annular edge of this orifice, the closest possible from this edge, the length of this cutting edge and its course being determined so that it completely crosses the space which is in front of the pouring orifice. Preferably the length of the cutting edge is at least equal to the outside diameter of the annular edge of the pouring orifice. Advantageously, the cutting tool is passed in front of the pouring orifice less than 30 seconds and preferably of the order of 10 seconds after the completion of the casting.
On utilise en particulier, pour enlever les excroissances formées sur le bord annulaire extérieur de l'orifice de coulée, le dispositif qui fait aussi l'objet de l'invention. Dans ce dispositif, l'outil tranchant, muni d'un bord de coupe qui vient d'être décrit, est fixé à une extrémité d'un bras dont l'autre extrémité est solidaire d'une tige de commande montée en rotation sur des paliers. L'axe de cette tige est sensiblement perpendiculaire au plan tangent au bord annulaire extérieur de l'orifice de coulée et l'outil tranchant est fixé au bras, de façon que, comme cela a été dit plus haut, son bord de coupe soit dans un plan parallèle au dit plan tangent et le plus près possible de celui-ci. Un moyen de manoeuvre permet de faire tourner la tige de commande, en entraînant ainsi le bras qui porte l'outil tranchant, de façon que le bord de coupe de celui-ci traverse complètement l'espace qui se trouve devant l'orifice de coulée. Au cours de ce passage l'outil tranchant sectionne les excroissances qui adhèrent au bord annulaire de l'orifice de coulée et dépassent vers le bas le plan dans lequel se déplace le bord de coupe de cet outil tranchant. Avantageusement un moyen de réglage permet d'ajuster la distance entre le plan de coupe et le plan tangent au bord annulaire extérieur de l'orifice de coulée de façon que le bord de coupe de l'outil tranchant passe juste au dessous de l'orifice de coulée sans cependant heurter son bord annulaire.In particular, the device which is also the subject of the invention is used to remove the protuberances formed on the outer annular edge of the pouring orifice. In this device, the cutting tool, provided with a cutting edge which has just been described, is fixed to one end of an arm, the other end of which is secured to a control rod mounted in rotation on bearings. The axis of this rod is substantially perpendicular to the plane tangent to the outer annular edge of the pouring orifice and the cutting tool is fixed to the arm, so that, as has been said above, its cutting edge is in a plane parallel to said tangent plane and as close as possible to it. An operating means makes it possible to rotate the control rod, thereby driving the arm which carries the cutting tool, so that the cutting edge of the latter completely crosses the space which is in front of the pouring orifice. . During this passage, the cutting tool cuts the protuberances which adhere to the annular edge of the pouring orifice and extend downwards the plane in which the cutting edge of this cutting tool moves. Advantageously, an adjustment means makes it possible to adjust the distance between the cutting plane and the plane tangent to the outer annular edge of the casting orifice so that the cutting edge of the cutting tool passes just below the orifice. without hitting its annular edge.
Avantageusement, le moyen de manoeuvre de la tige de commande est au moins un vérin qui permet de faire tourner cette tige de l'angle voulu pour que l'outil tranchant sectionne les excroissances fixées au bord annulaire de l'orifice de coulée, et qui permet aussi le retour de ce même outil tranchant à sa position de départ. Au moins le bord de coupe de l'outil tranchant de préférence biseauté est réalisé en tout matériau convenable pour sectionner des excroissances formées de tels résidus solides.Advantageously, the means for operating the control rod is at least one actuator which makes it possible to rotate this rod by the desired angle so that the cutting tool cuts through the protuberances fixed to the annular edge of the pouring orifice, and which also allows the same cutting tool to return to its starting position. At least the cutting edge of the preferably bevelled cutting tool is made of any material suitable for cutting out protuberances formed from such solid residues.
Il peut être réalisé en acier ordinaire ou encore par exemple en acier à outil, ou en acier inoxydable ou réfractaire. Il peut comporter aussi des pièces de coupe rapportées.It can be made of ordinary steel or for example of tool steel, or of stainless or refractory steel. It may also include added cutting parts.
L'exemple et les figures ci-après décrivent, de façon non limitative, un mode particulier de réalisation du dispositif suivant l'invention.
- Figure 1 : Vue schématique en plan, de dessus, du dispositif de nettoyage de l'orifice de coulée, suivant l'invention installé sur un four à arc d'aciérie à trois électrodes.
- Figure 2 : Vue en élévation de la zone latérale du four à arc, de la figure 1, avec coupe partielle au niveau de l'orifice de coulée équipé du dispositif suivant l'invention.
- Figure 3 : Vue de dessous de la zone latérale du four à arc de la figure 1 comportant l'orifice de coulée équipé du dispositif suivant l'invention.
- Figure 1: Schematic plan view, from above, of the device for cleaning the pouring orifice, according to the invention installed on a steel arc furnace with three electrodes.
- Figure 2: Elevation view of the lateral zone of the arc furnace, of Figure 1, with partial section at the level of the pouring orifice equipped with the device according to the invention.
- Figure 3: Bottom view of the lateral zone of the arc furnace of Figure 1 comprising the pouring orifice equipped with the device according to the invention.
La figure 1 est une vue schématique de dessus d'un four à arc d'aciérie (1) à trois électrodes (2) comportant une zone latérale de coulée (3). Cette zone latérale, équipée comme la zone de fusion d'un couvercle, comporte un orifice de coulée (4) visible en coupe sur la figure 2. Sur cette figure 2 une coupe partielle de l'enveloppe extérieure (5) fait apparaître le garnissage en réfractaire (6) qui entoure l'orifice de coulée (4). Le bord extérieur annulaire (7) de cet orifice est de révolution autour de l'axe (X1-X1). De façon connue, pendant la période de fusion de l'acier, le niveau de l'acier se trouve au dessus du niveau de l'entrée (8) de l'orifice de coulée (4) cet orifice étant rempli de poudre réfractaire pour protéger le clapet de fermeture dudit orifice jusqu'au moment de la coulée proprement dite. C'est seulement au moment de la coulée que le four est incliné de façon que l'acier liquide s'écoule rapidement après ouverture du clapet de fermeture de l'orifice de coulée dans une poche placée au dessous. Le four est ensuite ramené à sa position initiale. On constate alors que des résidus de coulée, constitués par de petites quantités d'acier et de laitier, solidifiées en cours de refroidissement, restent accrochés au bord annulaire extérieur (7) de l'orifice de coulée. Ces résidus forment des excroissances qui réduisent la section de passage de l'orifice de coulée et se prolongent au dessous du niveau du plan tangent à ce bord annulaire (7) dont la trace est indiquée en (18) à la figure 2. On sectionne alors ces excroissances en mettant en oeuvre l'outil tranchant (9). Cet outil (9) est une sorte de couteau, comme le montre la figure 3, dont le bord de coupe (10) est dans un plan parallèle au plan tangent au bord annulaire (7) de l'orifice de coulée. La distance entre ces deux plans est aussi réduite que possible, de façon à pouvoir sectionner les excroissances le plus près possible du bord annulaire (7) auquel elles sont accrochées. L'outil tranchant (9) est fixé à un bras (11) monté en rotation autour de l'axe (X2-X2) de la tige de commande (12). Cet axe (X2-X2) est perpendiculaire au plan tangent au bord annulaire (7). La tige de commande (12) est montée en rotation sur deux paliers (13-14) fixés à la paroi (5) du four. Cette rotation est provoquée par un moyen de manoeuvre constitué par un vérin (15), à double effet, dont le corps est relié par une articulation, de façon connue à la paroi (5) du four et dont la tige est reliée par une autre articulation, de façon également connue à un levier (16) monté à un angle droit sur la tige de commande (12) de façon à pouvoir l'entraîner en rotation. La position angulaire et la longueur du levier (16), la course du vérin (15), la position angulaire et la longueur du bras (11), sont déterminées de façon que la mise en action du vérin (15) entraîne le bras (11) qui déplace dans le sens de la flêche (F) l'outil tranchant depuis sa position de départ représentée en (9) jusqu'à sa position de fin de course représentée en tirets en (17). Au cours de ce déplacement le bord de coupe (10) sectionne toutes les excroissances qu'il rencontre qui dépassent vers le bas, le plan dans lequel il se déplace. La longueur du bras (11) est telle que le bord de coupe (10) passe devant l'orifice de coulée (4) sur toute sa section. La longueur de ce bord de coupe est au moins égale au diamètre de l'orifice de coulée (4) et de préférence supérieur à ce diamètre. Dans le cas du présent exemple la longueur du bord de coupe (10) est supérieure au diamètre extérieur (D) du bord annulaire (7) de l'orifice de coulée (4) comme on le voit figure 3. Ceci permet de sectionner les excroissances accrochées à ce bord annulaire (7) de façon particulièrement efficace. L'expérience a montré qu'il est particulièrement aisé de sectionner les excroissances lorsque les résidus de coulée viennent de se solidifier et sont encore à température élevée. Leur résistance mécanique est alors faible et l'effort exercé par l'outil tranchant ne cause pas de dégats au matériau réfractaire qui constitue le bord annulaire (7) de l'orifice de coulée. De préférence on actionne l'outil tranchant moins de 30 secondes et avantageusement de l'ordre de 10 secondes après la fin de la coulée. L'outil tranchant est ensuite ramené à sa position initiale. Dans le cas du présent exemple l'outil tranchant est réalisé en acier ordinaire biseauté.
Bien d'autres modes de réalisation du dispositif et du procédé suivant l'invention peuvent être envisagés qui ne sortent pas du domaine de celle-ci.Figure 1 is a schematic top view of a steel arc furnace (1) with three electrodes (2) having a lateral casting zone (3). This lateral zone, equipped like the melting zone with a cover, comprises a pouring orifice (4) visible in section in FIG. 2. In this FIG. 2, a partial section of the outer envelope (5) reveals the lining. as a refractory (6) which surrounds the pouring orifice (4). The annular outer edge (7) of this orifice is of revolution about the axis (X1-X1). In known manner, during the melting period of the steel, the level of the steel is above the level of the inlet (8) of the pouring orifice (4) this orifice being filled with refractory powder for protect the closing valve of said orifice until the moment of actual casting. It is only at the time of pouring that the furnace is tilted so that the liquid steel flows quickly after opening the valve closing the pouring orifice in a pocket placed below. The oven is then returned to its initial position. It is then observed that casting residues, consisting of small quantities of steel and slag, solidified during cooling, remain attached to the outer annular edge (7) of the casting orifice. These residues form growths which reduce the flow section of the pouring orifice and extend below from the level of the plane tangent to this annular edge (7), the trace of which is indicated in (18) in FIG. 2. These protrusions are then sectioned by using the cutting tool (9). This tool (9) is a kind of knife, as shown in FIG. 3, the cutting edge (10) of which is in a plane parallel to the plane tangent to the annular edge (7) of the pouring orifice. The distance between these two planes is as small as possible, so that the growths can be cut as close as possible to the annular edge (7) to which they are attached. The cutting tool (9) is fixed to an arm (11) rotatably mounted around the axis (X2-X2) of the control rod (12). This axis (X2-X2) is perpendicular to the plane tangent to the annular edge (7). The control rod (12) is rotatably mounted on two bearings (13-14) fixed to the wall (5) of the oven. This rotation is caused by an operating means constituted by a double-acting jack (15), the body of which is connected by a joint, in a known manner to the wall (5) of the furnace and the rod of which is connected by another articulation, in a manner also known to a lever (16) mounted at a right angle on the control rod (12) so as to be able to drive it in rotation. The angular position and the length of the lever (16), the stroke of the jack (15), the angular position and the length of the arm (11), are determined so that the actuation of the jack (15) drives the arm ( 11) which moves in the direction of the arrow (F) the cutting tool from its starting position shown in (9) to its end of stroke position shown in dashes in (17). During this movement, the cutting edge (10) cuts all the growths which it meets which extend downwards, the plane in which it moves. The length of the arm (11) is such that the cutting edge (10) passes in front of the pouring orifice (4) over its entire section. The length of this cutting edge is at least equal to the diameter of the pouring orifice (4) and preferably greater than this diameter. In the case of the present example, the length of the cutting edge (10) is greater than the outside diameter (D) of the annular edge (7) of the pouring orifice (4) as seen in FIG. 3. This makes it possible to cut the growths attached to this annular edge (7) particularly effectively. Experience has shown that it is particularly easy to cut off the protuberances when the casting residues have just solidified and are still at high temperature. Their mechanical resistance is then low and the force exerted by the cutting tool does not cause damage to the refractory material which constitutes the annular edge (7) of the pouring orifice. Preferably we operate the cutting tool less than 30 seconds and advantageously of the order of 10 seconds after the end of the casting. The cutting tool is then returned to its initial position. In the case of this example, the cutting tool is made of beveled ordinary steel.
Many other embodiments of the device and method according to the invention can be envisaged which do not depart from the field of the latter.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT87420119T ATE48186T1 (en) | 1986-05-06 | 1987-05-04 | PROCEDURE FOR CLEANING THE TAP HOLE IN A STEEL PLANT FURNACE WITH BAY VIEW TAP. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8607012 | 1986-05-06 | ||
| FR8607012A FR2598437B1 (en) | 1986-05-06 | 1986-05-06 | PROCESS AND DEVICE FOR CLEANING THE CASTING ORIFICE OF A BOTTOM CAST STEEL FURNACE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0248742A1 true EP0248742A1 (en) | 1987-12-09 |
| EP0248742B1 EP0248742B1 (en) | 1989-11-23 |
Family
ID=9335285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87420119A Expired EP0248742B1 (en) | 1986-05-06 | 1987-05-04 | Process and device for cleaning the tap hole of a steel furnace provided with an extended bottom tap hole |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0248742B1 (en) |
| AT (1) | ATE48186T1 (en) |
| DE (1) | DE3761031D1 (en) |
| ES (1) | ES2011817B3 (en) |
| FR (1) | FR2598437B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007058446A1 (en) * | 2007-12-05 | 2009-06-10 | Siemens Ag | Oven and cleaning device for a stove |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2535835A1 (en) * | 1982-11-10 | 1984-05-11 | Mannesmann Ag | TILTING ARC OVEN |
| FR2555719A1 (en) * | 1983-11-24 | 1985-05-31 | Clecim Sa | Device for closing off a tap hole |
| EP0173669A2 (en) * | 1984-06-01 | 1986-03-05 | VOEST-ALPINE Aktiengesellschaft | Tiltable metallurgical vessel |
-
1986
- 1986-05-06 FR FR8607012A patent/FR2598437B1/en not_active Expired
-
1987
- 1987-05-04 ES ES87420119T patent/ES2011817B3/en not_active Expired - Lifetime
- 1987-05-04 EP EP87420119A patent/EP0248742B1/en not_active Expired
- 1987-05-04 AT AT87420119T patent/ATE48186T1/en not_active IP Right Cessation
- 1987-05-04 DE DE8787420119T patent/DE3761031D1/en not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2535835A1 (en) * | 1982-11-10 | 1984-05-11 | Mannesmann Ag | TILTING ARC OVEN |
| FR2555719A1 (en) * | 1983-11-24 | 1985-05-31 | Clecim Sa | Device for closing off a tap hole |
| EP0173669A2 (en) * | 1984-06-01 | 1986-03-05 | VOEST-ALPINE Aktiengesellschaft | Tiltable metallurgical vessel |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0248742B1 (en) | 1989-11-23 |
| ATE48186T1 (en) | 1989-12-15 |
| FR2598437A1 (en) | 1987-11-13 |
| ES2011817B3 (en) | 1990-02-16 |
| DE3761031D1 (en) | 1989-12-28 |
| FR2598437B1 (en) | 1989-05-26 |
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