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EP0356618A1 - Shut-off and/or control element for tapping molten metal melts from a metallurgical container - Google Patents

Shut-off and/or control element for tapping molten metal melts from a metallurgical container Download PDF

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Publication number
EP0356618A1
EP0356618A1 EP89107511A EP89107511A EP0356618A1 EP 0356618 A1 EP0356618 A1 EP 0356618A1 EP 89107511 A EP89107511 A EP 89107511A EP 89107511 A EP89107511 A EP 89107511A EP 0356618 A1 EP0356618 A1 EP 0356618A1
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EP
European Patent Office
Prior art keywords
refractory
closing
molten metal
annular gap
parts
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.)
Granted
Application number
EP89107511A
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German (de)
French (fr)
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EP0356618B1 (en
Inventor
Raimund Brückner
José GIMPERA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Didier Werke AG
Original Assignee
Didier Werke AG
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Publication date
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Priority to AT89107511T priority Critical patent/ATE82173T1/en
Publication of EP0356618A1 publication Critical patent/EP0356618A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D37/00—Controlling or regulating the pouring of molten metal from a casting melt-holding vessel
    • 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
    • B22D41/14—Closures

Definitions

  • the invention relates to a closing and / or regulating member for tapping liquid melt from a metallurgical vessel with an immovable refractory part and a movable refractory part that can be rotated and / or displaced relative to it, both refractory parts being provided with a circular cylindrical sealing surface and both sealing surfaces are fitted into one another in a sealing manner.
  • the refractory parts are usually made of ceramic material. However, they can also be made from other, for example metallic, materials which may also be combined with one another. The only decisive factor here is that these parts are fire-proof, that is to say that they not only withstand the mechanical and chemical exposure during operation, but also the temperature-related stress caused by the molten metal.
  • Closing and / or regulating devices of this type are characterized in that they have the pressing device which is otherwise required in conventional linear and rotary slide closures for melting and airtight pressing of the movable closure parts to each other can be omitted.
  • This makes it possible, on the one hand, to actuate the closing and / or regulating element with relatively low driving forces, and, on the other hand, to arrange its refractory parts in the interior of the metallurgical vessel, so that they are immersed in the molten metal during operation. This prevents the outside air from attacking the refractory parts of the closing and / or regulating member or from penetrating through the refractory parts into the molten metal.
  • the dimensioning of the annular gap between the two circular cylindrical sealing surfaces of the refractory parts is of crucial importance for the proper functioning of the closing and / or regulating element during operation.
  • the annular gap must be dimensioned such that, on the one hand, it enables the two refractory parts to move freely with one another during operation, and, on the other hand, is narrow enough to prevent the molten metal from penetrating into the region of the annular gap.
  • the various metallurgical parameters such as the nature of the molten metal, wettability of the refractory parts, liquidus temperature of the melt etc. also play a role here. a role.
  • the object of the invention is to optimize the width of the annular gap between the sealing surfaces of the refractory parts in the sense of the above requirements in the case of a closing and / or regulating element of the type mentioned at the outset.
  • the expansion coefficients of the two refractory parts are matched to one another in such a way that, in the operating state, an annular gap which forms a still melt-tight fit is established between the circular-cylindrical sealing surfaces of the two refractory parts.
  • the closing and / or regulating element according to the invention is further characterized according to a preferred embodiment in that the expansion coefficients of both refractory parts are the same. This makes it possible to use refractory parts of the same type, which makes the structural design of the refractory parts and the determination of the annular gap between their circular-cylindrical sealing surfaces easier. In addition, the manufacture of the closing and / or regulating member is simplified in this way.
  • the annular gap which in the operating state forms a play fit that is still melt-tight, has the same dimensions over the entire length of the two interacting circular-cylindrical sealing surfaces of the refractory parts.
  • the annular gap which in the operating state still forms a tight fit to the melt, to the area of the two interacting circular-cylindrical sealing surfaces of the refractory parts, in which the opening and closing areas of the two Refractory parts lie.
  • refractory parts can be stretched as uniformly as possible and also in order to make these parts as simple as possible, it is also advantageous that they are designed as cylindrical tubes at least in the area of their interacting circular-cylindrical sealing surfaces.
  • the annular gap which in the operating state is still a melt-tight clearance fit, is between 0.05 in the cold state and is 0.7 mm.
  • the closing and / or regulating element 1 consists of a tubular stator 2 and a likewise tubular rotor 3, both made of ceramic, refractory material.
  • the stator 2 is mortar-sealed in the refractory lining 4 of the intermediate vessel 5 in an airtight and melt-tight manner and opens into a freewheel nozzle 6 through which the molten metal flows out of the interior of the intermediate vessel 5 when the closing and / or regulating member 1 is open.
  • the rotor 3 is non-rotatably connected by bolts 7 to a holder 8, which in turn is connected to a drive arm 10 via a cardan link 9.
  • the latter is supported on a bearing block 11 of the intermediate vessel 5 and has a lever arm 12 at its outer end, with the aid of which a torque is applied to the holder 8 and thus to the rotor 3 of the closing and / or via the drive arm 10 and the cardan joint 9
  • Control body 1 can exercise.
  • the rotor 3 is rotatable relative to the stator 2 in both directions of rotation about the common longitudinal axis 13.
  • Both the stator 2 and the rotor 3 are each provided with two diametrically opposed through bores 14 and 15, which are aligned in the axial direction in the open position of the closing and / or regulating member 1 shown.
  • the stator 2 and the rotor 3 are also provided in an axial region 16 each with a circular cylindrical sealing surface 17, 18, both sealing surfaces 17, 18 being fitted into one another in a sealing manner.
  • the diameter of both sealing surfaces 17, 18 are dimensioned such that an annular gap 19 is formed between the two.
  • the outside diameter of the stator 2 outside the axial area 16 was approx. 73 mm, that of the rotor 3 approx. 93 mm.
  • the inner diameters of the stator 2 and the rotor 3 were approx. 33 mm and approx. 40 mm, respectively.
  • the average diameter in the area of the annular gap 19 was approximately 63 mm.
  • the stator 2 and the rotor 3 were produced from a high-alumina, fired refractory material with the following composition: Al2O3 - about 70% by weight Zircon mullite - approx. 20% by weight Carbon content - approx. 10% by weight.
  • stator 2 and the rotor 3 were made of the same material, so that both refractory parts had the same expansion coefficient.
  • the diameters of the sealing surfaces 17 and 18 were determined so that both diameters differed by approximately 0.4 mm when cold.
  • the annular gap 19 between the two sealing surfaces was thus approximately 0.2 mm.
  • the stator 2 was then preheated uniformly to a temperature of approximately 950 ° C. with the rotor 3.
  • the interior of the intermediate vessel 4 was then filled with steel melt to a level of 20.
  • the melt was then poured from commercially available, slightly liquid steel at a temperature of approximately 1560 ° C.
  • the rotor 3 was repeatedly rotated relative to the stator 2 in order to bring the through bores 14, 15 of both parts more or less in register and thus regulate the melt flow flowing out of the intermediate vessel 5.
  • the rotor 3 was also rotated several times until the through holes 14 and 15 were no longer in register. The melt passage through the closing and / or regulating element 1 was thus completely interrupted.
  • the rotor 3 could be turned by hand relative to the stator 2 with little effort.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Continuous Casting (AREA)
  • Packages (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

The present invention is drawn to a regulating device of a metallurgical vessel for regulating the flow of molten metal from the vessel. The device includes a fixed refractory part defining a first cylindrical peripheral surface of the device and a movable refractory part that is rotatable and/or slidable relative to the fixed refractory part and defines a second cylindrical peripheral surface sealingly engaged with the first cylindrical peripheral surface. An actuating device is connected to the movable refractory part for rotating and/or sliding the movable refractory part relative to the fixed refractory part. The cylindrical peripheral surfaces of the refractory parts are spaced apart from one another so as to define an annular gap therebetween. In order to ensure that during operation the refractory parts can be moved relative to one another by the actuating device while preventing the penetration of molten metal into the annular gap, each of the refractory parts has a coefficient of thermal expansion which, when the device is subjected to a high temperature corresponding to the melting temperature of a molten metal, causes a clearance fit to be established between the peripheral surfaces that is effective to prevent molten metal having a melting point at the same predetermined high temperature from penetrating between the peripheral sealing surfaces while allowing the movable refractory part to be moved relative to the fixed refractory part.

Description

Die Erfindung betrifft ein Schließ- und/oder Regelorgan für den Abstich flüssiger Schmelze aus einem metallurgischen Gefäß mit einem unbeweglichen Feuerfestteil und einem relativ zu diesem dichtend dreh- und/oder verschiebbaren, beweglichen Feuerfestteil, wobei beide Feuerfestteile mit je einer kreiszylindrischen Dichtfläche versehen sind und beide Dichtflächen ineinander dichtend eingepaßt sind. Die Feuerfestteile sind normalerweise aus keramischem Material hergestellt. Sie können aber auch aus anderen, beispielsweise metallischen, ggf. auch miteinander kombinierten Werkstoffen hergestellt sein. Entscheidend ist es hierbei lediglich, daß diese Teile feuerfest sind, das heißt, daß sie im Betrieb nicht nur der mechanischen und chemischen Beaufschlagung, sondern auch der temperaturbedingten Beanspruchung durch die Metallschmelze standhalten.The invention relates to a closing and / or regulating member for tapping liquid melt from a metallurgical vessel with an immovable refractory part and a movable refractory part that can be rotated and / or displaced relative to it, both refractory parts being provided with a circular cylindrical sealing surface and both sealing surfaces are fitted into one another in a sealing manner. The refractory parts are usually made of ceramic material. However, they can also be made from other, for example metallic, materials which may also be combined with one another. The only decisive factor here is that these parts are fire-proof, that is to say that they not only withstand the mechanical and chemical exposure during operation, but also the temperature-related stress caused by the molten metal.

Derartige Schließ- und/oder Regelorgane, wie sie beispielsweise aus der DE-PS 35 40 202 bekannt sind, zeichnen sich dadurch aus, daß bei ihnen die sonst bei herkömmlichen Linear- und Drehschieberverschlüssen erforderliche Anpreßeinrichtung zum schmelze- und luftdichten Anpressen der beweglichen Verschlußteile zueinander entfallen kann. Dadurch ist es zum einen möglich, das Schließ- und/oder Regelorgan mit relativ geringen Antriebskräften zu betätigen, und zum anderen seine Feuerfestteile im Innenraum des metallurgischen Gefäßes anzuordnen, so daß sie im Betrieb in der Metallschmelze eingetaucht sind. Damit wird verhindert, daß die Außenluft die Feuerfestteile des Schließ- und/­oder Regelorgans angreifen kann bzw. daß sie durch die Feuerfestteile hindurch bis in die Metallschmelze eindringen kann.Closing and / or regulating devices of this type, as are known, for example, from DE-PS 35 40 202, are characterized in that they have the pressing device which is otherwise required in conventional linear and rotary slide closures for melting and airtight pressing of the movable closure parts to each other can be omitted. This makes it possible, on the one hand, to actuate the closing and / or regulating element with relatively low driving forces, and, on the other hand, to arrange its refractory parts in the interior of the metallurgical vessel, so that they are immersed in the molten metal during operation. This prevents the outside air from attacking the refractory parts of the closing and / or regulating member or from penetrating through the refractory parts into the molten metal.

Bei einem solchen Schließ- und/oder Regelorgan ist die Bemessung des Ringspaltes zwischen den beiden kreiszylindrischen Dichtflächen der Feuerfestteile für die einwandfreie Funktionsfähigkeit des Schließ- und/oder Regelorgans im Betrieb von entscheidender Bedeutung. Der Ringspalt muß so bemessen sein, daß er im Betrieb einerseits die freie Beweglichkeit der beiden Feuerfestteile zueinander ermöglicht, und andererseits eng genug ist, um zu verhindern, daß die Metallschmelze in den Bereich des Ringspaltes eindringen kann. Hierbei spielen auch selbstverständlich die verschiedenen metallurgischen Parameter wie Beschaffenheit der Metallschmelze, Benetzbarkeit der Feuerfestteile, Liquidustemperatur der Schmelze u.s.w. eine Rolle.With such a closing and / or regulating element, the dimensioning of the annular gap between the two circular cylindrical sealing surfaces of the refractory parts is of crucial importance for the proper functioning of the closing and / or regulating element during operation. The annular gap must be dimensioned such that, on the one hand, it enables the two refractory parts to move freely with one another during operation, and, on the other hand, is narrow enough to prevent the molten metal from penetrating into the region of the annular gap. Of course, the various metallurgical parameters such as the nature of the molten metal, wettability of the refractory parts, liquidus temperature of the melt etc. also play a role here. a role.

Der Erfindung liegt die Aufgabe zugrunde, bei einem Schließ-­und/oder Regelorgan der eingangs genannten Art, die Breite des Ringspaltes zwischen den Dichtflächen der Feuerfestteile im Sinne der obigen Anforderungen zu optimieren.The object of the invention is to optimize the width of the annular gap between the sealing surfaces of the refractory parts in the sense of the above requirements in the case of a closing and / or regulating element of the type mentioned at the outset.

Zur Lösung dieser Aufgabe wird gemäß der Erfindung vorgeschlagen, daß die Ausdehnungskoeffizienten der beiden Feuerfestteile aufeinander so abgestimmt sind, daß sich im Betriebszustand zwischen den kreiszylindrischen Dichtflächen der beiden Feuerfestteile ein eine noch schmelzedichte Spielpassung bildende Ringspalt einstellt.To achieve this object, it is proposed according to the invention that the expansion coefficients of the two refractory parts are matched to one another in such a way that, in the operating state, an annular gap which forms a still melt-tight fit is established between the circular-cylindrical sealing surfaces of the two refractory parts.

Durch den erfindungsgemäßen Vorschlag, den Ringspalt zwischen den Dichtflächen der Feuerfestteile in Abhängigkeit von den aufeinander abzustimmenden Ausdehnungskoeffizienten dieser Teile zu bemessen, ist es möglich, den Ringspalt im kalten Zustand so auszulegen, daß er während der gesamten Betriebsdauer, d.h. von Betriebsanfang bis Betriebsende, sowohl die freie Beweglichkeit der beiden Feuerfestteile zueinander als auch die einwandfreie Dichtigkeit des Schließ- und/oder Regelorgangs gegenüber der Metallschmelze im metallurgischen Gefäß gewährleistet.Through the proposal according to the invention to measure the annular gap between the sealing surfaces of the refractory parts as a function of the expansion coefficients of these parts to be coordinated with one another, it is possible to design the annular gap in the cold state in such a way that it remains open during the entire operating period, i.e. From the start of operation to the end of operation, both the free movement of the two refractory parts to one another and the perfect tightness of the closing and / or control system with respect to the molten metal in the metallurgical vessel are guaranteed.

Das Schließ- und/oder Regelorgan nach der Erfindung ist ferner gemäß einer bevorzugten Ausführungsform dadurch gekennzeichnet, daß die Ausdehnungskoeffizienten beider Feuerfestteile gleich sind. Dadurch ist es möglich, gleich beschaffene Feuerfestteile zu verwenden, was die konstruktive Auslegung der Feuerfestteile sowie die Festlegung des Ringspaltes zwischen deren kreiszylindrischen Dichtflächen leichter macht. Darüberhinaus wird die Herstellung des Schließ- und/oder Regelorganes auf diese Weise vereinfacht.The closing and / or regulating element according to the invention is further characterized according to a preferred embodiment in that the expansion coefficients of both refractory parts are the same. This makes it possible to use refractory parts of the same type, which makes the structural design of the refractory parts and the determination of the annular gap between their circular-cylindrical sealing surfaces easier. In addition, the manufacture of the closing and / or regulating member is simplified in this way.

Ebenfalls im Sinne einer vereinfachten Herstellungsweise wird ferne gemäß der Erfindung vorgeschlagen, daß der im Betriebszustand eine noch schmelzedichte Spielpassung bildende Ringspalt auf der gesamten Länge der beiden miteinander zusammenwirkenden kreiszylindrischen Dichtflächen der Feuerfestteile gleich bemessen ist.Also in the sense of a simplified manufacturing method it is further proposed according to the invention that the annular gap, which in the operating state forms a play fit that is still melt-tight, has the same dimensions over the entire length of the two interacting circular-cylindrical sealing surfaces of the refractory parts.

Alternativ dazu kann auch je nach Art des Schließ- und/oder Regelorgans von Vorteil sein, den im Betriebszustand eine noch schmelzedichte Spielpassung bildenden Ringspalt auf den Flächenbereich der beiden miteinander zusammenwirkenden kreiszylindrischen Dichtflächen der Feuerfestteile zu beschränken, in dem die Öffnungs- und Schließbereiche der beiden Feuerfestteile liegen. Bei dieser Ausführungsform ist es zum Beispiel möglich, den Ringspalt zwischen den Feuerfestteilen relativ breit zu bemessen und ihn nur in dem obengenannten Flächenbereich der Dichtflächen zu verengen, beispielsweise durch Auftragen einer Oberflächenbeschichtung auf eines der Feuerfestteile oder alternativ auf beide Teile.Alternatively, depending on the type of closing and / or regulating element, it may be advantageous to restrict the annular gap, which in the operating state still forms a tight fit to the melt, to the area of the two interacting circular-cylindrical sealing surfaces of the refractory parts, in which the opening and closing areas of the two Refractory parts lie. In this embodiment it is possible, for example, to dimension the annular gap between the refractory parts relatively broadly and to narrow it only in the abovementioned surface area of the sealing surfaces, for example by applying a surface coating to one of the refractory parts or alternatively to both parts.

Zwecks einer möglichst gleichmäßigen Dehnbarkeit der Feuerfestteile und auch im Hinblich auf eine möglichst einfachere Herstellung dieser Teile ist es ferner von Vorteil, daß sie zumindest im Bereich ihrer miteinander zusammenwirkenden kreiszylindrischen Dichtflächen als zylindrische Rohre ausgebildet sind.In order to ensure that the refractory parts can be stretched as uniformly as possible and also in order to make these parts as simple as possible, it is also advantageous that they are designed as cylindrical tubes at least in the area of their interacting circular-cylindrical sealing surfaces.

Ausgehend von den in der Praxis zu vergießenden Schmelzen sowie von den zur Verfügung stehenden Werkstoffen für die Feuerfestteile des Schließ- und/oder Regelorgangs gemäß der Erfindung ist es zweckmäßig, daß der im Betriebszustand eine noch schmelzedichte Spielpassung bildende Ringspalt im kalten Zustand zwischen 0,05 und 0.7 mm beträgt.Starting from the melts to be cast in practice and from the materials available for the refractory parts of the closing and / or regulating mechanism according to the invention, it is expedient that the annular gap, which in the operating state is still a melt-tight clearance fit, is between 0.05 in the cold state and is 0.7 mm.

Die Erfindung wird nachfolgend anhand eines praktischen Ausführungsbeispiels unter Bezugnahme auf die Zeichnung näher erläutert.The invention is explained in more detail below using a practical exemplary embodiment with reference to the drawing.

Es zeigen:

  • Fig. 1 ein erfindungsgemäßes Schließ- und/oder Regelorgan in senkrechter Anordnung, in einem Zwischengefäß (Tundish) eingebaut,
  • Fig. 2 die Einzelheit I aus Fig. 1, vergrößert dargestellt.
Show it:
  • 1 an inventive closing and / or regulating element in a vertical arrangement, installed in an intermediate vessel (tundish),
  • Fig. 2 shows the detail I of Fig. 1, enlarged.

Das erfindungsgemäße Schließ- und/oder Regelorgan 1 besteht aus einem rohrförmigen Stator 2 und einem ebenfalls rohrförmigen Rotor 3, beide aus keramischem, feuerfestem Material.The closing and / or regulating element 1 according to the invention consists of a tubular stator 2 and a likewise tubular rotor 3, both made of ceramic, refractory material.

Der Stator 2 ist in der feuerfesten Auskleidung 4 des Zwischengefäßes 5 luft- und schmelzedicht eingemörtelt und mündet in eine Freilaufdüse 6 ein, durch welche bei geöffnetem Schließ- und/oder Regelorgan 1 die Metallschmelze aus den Inneren des Zwischengefäßes 5 herausströmt.The stator 2 is mortar-sealed in the refractory lining 4 of the intermediate vessel 5 in an airtight and melt-tight manner and opens into a freewheel nozzle 6 through which the molten metal flows out of the interior of the intermediate vessel 5 when the closing and / or regulating member 1 is open.

Der Rotor 3 ist durch Bolzen 7 mit einer Halterung 8 drehfest verbunden, die ihrerseits über eine Kardanlenkung 9 mit einem Antriebsarm 10 verbunden ist. Letzterer lagert auf einem Lagerbock 11 des Zwischengefäßes 5 und weist an seinem äußeren Ende einen Hebelarm 12 auf, mit dessen Hilfe man über den Antriebsarm 10 und die Kardanlenkung 9 ein Dremoment auf die Halterung 8 und somit auf den Rotor 3 des Schließ- und/oder Regelorgans 1 ausüben kann.The rotor 3 is non-rotatably connected by bolts 7 to a holder 8, which in turn is connected to a drive arm 10 via a cardan link 9. The latter is supported on a bearing block 11 of the intermediate vessel 5 and has a lever arm 12 at its outer end, with the aid of which a torque is applied to the holder 8 and thus to the rotor 3 of the closing and / or via the drive arm 10 and the cardan joint 9 Control body 1 can exercise.

Hierdurch ist der Rotor 3 gegenüber dem Stator 2 in beiden Drehrichtungen um die gemeinsame Längsachse 13 drehbar.As a result, the rotor 3 is rotatable relative to the stator 2 in both directions of rotation about the common longitudinal axis 13.

Sowohl der Stator 2 als auch der Rotor 3 sind mit je zwei diametral zueinander liegenden Durchgangsbohrungen 14 bzw. 15 versehen, die in der dargestellten Öffnungsstellung des Schließ- und/oder Regelorgans 1 in axialer Richtung fluchten. Der Stator 2 und der Rotor 3 sind ferner in einem Axialbereich 16 mit je einer kreiszylindrischen Dichtfläche 17, 18 versehen, wobei beide Dichtflächen 17, 18 ineinander dichtend eingepaßt sind. Die Durchmesser beider Dichtflächen 17, 18 sind so bemessen, daß zwischen beiden ein Ringspalt 19 gebildet wird.Both the stator 2 and the rotor 3 are each provided with two diametrically opposed through bores 14 and 15, which are aligned in the axial direction in the open position of the closing and / or regulating member 1 shown. The stator 2 and the rotor 3 are also provided in an axial region 16 each with a circular cylindrical sealing surface 17, 18, both sealing surfaces 17, 18 being fitted into one another in a sealing manner. The diameter of both sealing surfaces 17, 18 are dimensioned such that an annular gap 19 is formed between the two.

Beim vorliegenden Ausführungsfall betrug der Außendurchmesser des Stators 2 außerhalb des Axialbereiches 16 ca. 73mm, der des Rotors 3 ca. 93 mm. Die Innendurchmesser des Stators 2 und des Rotors 3 betrugen ca. 33 mm bzw. ca. 40 mm. Im Axialbereich 16 betrug der mittlere Durchmesser im Bereich des Ringspaltes 19 ca. 63 mm.In the present embodiment, the outside diameter of the stator 2 outside the axial area 16 was approx. 73 mm, that of the rotor 3 approx. 93 mm. The inner diameters of the stator 2 and the rotor 3 were approx. 33 mm and approx. 40 mm, respectively. In the axial area 16, the average diameter in the area of the annular gap 19 was approximately 63 mm.

Der Stator 2 und der Rotor 3 wurden aus einem hochtonerdehaltigen, gebrannten feuerfesten Werkstoff mit folgender Zusammensetzung hergestellt:
Al₂O₃ - ca. 70% Gew.-Anteile
Zirkonmullit - ca. 20% Gew.-Anteile
Kohlenstoffanteil - ca. 10% Gew.-Anteile.The stator 2 and the rotor 3 were produced from a high-alumina, fired refractory material with the following composition:
Al₂O₃ - about 70% by weight
Zircon mullite - approx. 20% by weight
Carbon content - approx. 10% by weight.

Der Stator 2 und der Rotor 3 wurden aus dem gleichen Werkstoff hergestellt, so daß beide Feuerfestteile gleiche Ausdehnungskoeffizienten hatten.The stator 2 and the rotor 3 were made of the same material, so that both refractory parts had the same expansion coefficient.

Die Durchmesser der Dichtflächen 17 und 18 wurden so fest­gelegt, daß im kalten Zustand beide Durchmesser um ca. 0,4 mm differierten. Der Ringspalt 19 zwischen beiden Dichtflächen betrug somit ca. 0,2 mm.The diameters of the sealing surfaces 17 and 18 were determined so that both diameters differed by approximately 0.4 mm when cold. The annular gap 19 between the two sealing surfaces was thus approximately 0.2 mm.

Vor der Inbetriebnahme des Schließ- und/oder Regelorgans 1 wurde auf die Dichtflächen 17 und 18 ein graphithaltiges Schmiermittel aufgetragen, so daß nach dieser Operation die Durchmesser der Dichflächen 17 und 18 nur noch um ca. 0,25 mm differierten. Der Ringspalt 19 betrug somit nurmehr ca. 0,125 mm.Before the closing and / or control element 1 was put into operation, a graphite-containing lubricant was applied to the sealing surfaces 17 and 18, so that after this operation the diameters of the sealing surfaces 17 and 18 only differed by approximately 0.25 mm. The annular gap 19 was thus only approximately 0.125 mm.

Unter diesen Bedingungen konnte bei leerem Zwischengefäß 4 und im kalten Zustand der Rotor 3 mit Hilfe des Antrieb­armes 10 einwandfrei relativ zum Stator 2 gedreht werden.Under these conditions, when the intermediate vessel 4 was empty and in the cold state, the rotor 3 could be rotated perfectly with respect to the stator 2 with the aid of the drive arm 10.

Anschließend wurde der Stator 2 mit dem rotor 3 gleichmäßig auf eine Temperatur von ca. 950°C vorgewärmt. Danach wurde der Innenraum des Zwischengefäßes 4 mit Stahlschmelze bis zu einem Pegel 20 aufgefüllt.The stator 2 was then preheated uniformly to a temperature of approximately 950 ° C. with the rotor 3. The interior of the intermediate vessel 4 was then filled with steel melt to a level of 20.

Anschließend wurde die Schmelze aus handelsüblichem, leicht flüssigem Stahl bei einer Temperatur von ca. 1560°C abgegossen. Zwischendurch wurde immer wieder der Rotor 3 gegenüber dem Stator 2 gedreht, um die Durchgangsbohrungen 14, 15 beider Teile mehr oder weniger in Deckung zu bringen und somit den aus dem Zwischengefäß 5 herausfließenden Schmelzefluß zu regulieren. Der Rotor 3 wurde auch mehrere Male weitergedreht, bis die Durchgangsbohrungen 14 und 15 nicht mehr in Deckung waren. Damit wurde der Schmelzedurchgang durch das Schließ- und/oder Regelorgan 1 ganz unterbrochen.The melt was then poured from commercially available, slightly liquid steel at a temperature of approximately 1560 ° C. In between, the rotor 3 was repeatedly rotated relative to the stator 2 in order to bring the through bores 14, 15 of both parts more or less in register and thus regulate the melt flow flowing out of the intermediate vessel 5. The rotor 3 was also rotated several times until the through holes 14 and 15 were no longer in register. The melt passage through the closing and / or regulating element 1 was thus completely interrupted.

Insgesamt wurden durch das Schließ- und/oder Regelorgan 1 vier Pfannenchargen vergossen, was eine Betriebszeit von ca. 4 Stunden in Anspruch nahm. Bei jeder Charge ließ man den Schmelzepegel 20 nur soweit abgesenken, daß der Axialbereich 16 des Schließ- und/oder Regelorgans noch in der Metallschmelze eingetaucht blieb. Damit war gewährleistet, daß die Außenluft weder durch die Durchgangsbohrungen 14, 15 noch durch den Ringspalt 19 des Schließ- und/oder Regelorgans 1 eindringen konnte.A total of four pan batches were shed by the locking and / or regulating device 1, which took an operating time of approximately 4 hours. For each batch, the melt level 20 was only lowered to such an extent that the axial region 16 of the closing and / or regulating member remained immersed in the molten metal. This ensured that the outside air could neither penetrate through the through holes 14, 15 nor through the annular gap 19 of the closing and / or regulating member 1.

Während des ganzen Betriebes konnte der Rotor 3 einwandfrei und mit geringem Kraftaufwand von Hand gegenüber dem Stator 2 gedreht werden.During the entire operation, the rotor 3 could be turned by hand relative to the stator 2 with little effort.

Nach der o.g. Betriebszeit von ca. 4 Stunden wurden die Bestandteile des Schließ- und/oder Regelorgans 1 abgenommen und auf etwaige Metallinfiltrationen untersucht. Es wurde festegestellt, daß während des Betriebes im Bereich des Ringspaltes 19 keine nennenswerten Metallinfiltrationen erfolgt waren.After the above Operating time of approx. 4 hours, the components of the closing and / or regulating element 1 were removed and examined for any metal infiltration. It was found that no significant metal infiltration occurred during operation in the area of the annular gap 19.

Claims (6)

1. Schließ- und/oder Regelorgan für den Abstich flüssiger Metallschmelze aus einem metallurgischen Gefäß mit einem unbeweglichen Feuerfestteil und einem relativ zu diesem dichtend dreh- und/oder verschiebbaren, beweglichen Feuerfestteil, wobei beide Feuerfestteile mit je einer kreiszylindrischen Dichtfläche versehen sind und beide Dichtflächen ineinander dichtend eingepaßt sind, dadurch gekennzeichnet, daß die Ausdehnungskoeffizienten der beiden Feuerfestteile aufeinander so abgestimmt sind, daß sich im Betriebszustand zwischen den kreiszylindrischen Dichtflächen der beiden Feuerfestteile ein eine noch schmelzedichte Spielpassung bildender Ringspalt einstellt.1. Closing and / or regulating member for tapping liquid molten metal from a metallurgical vessel with an immovable refractory part and a movable refractory part that can be rotated and / or displaced relative to it, both refractory parts being provided with a circular cylindrical sealing surface and both sealing surfaces are fitted into one another in a sealing manner, characterized in that the expansion coefficients of the two refractory parts are matched to one another in such a way that in the operating state an annular gap which still forms a melt-tight fit is formed between the circular-cylindrical sealing surfaces of the two refractory parts. 2. Schließ- und/oder Regelorgan nach Anspruch 1, dadurch gekennzeichnet, daß die Ausdehnungskoeffizienten beider Feuerfestteile gleich sind.2. Closing and / or regulating element according to claim 1, characterized in that the expansion coefficients of both refractory parts are the same. 3. Schließ- und/oder Regelorgan nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der im Betriebszustand eine noch schmelzedichte Spielpassung bildende Ringspalt auf der gesamten Länge der beiden miteinander zusammenwirkenden kreiszylindrischen Dichtflächen der Feuerfestteile gleich bemessen ist.3. Closing and / or regulating element according to claim 1 or 2, characterized in that the annular gap, which in the operating state forms a play fit that is still melt-tight, is dimensioned the same over the entire length of the two interacting circular cylindrical sealing surfaces of the refractory parts. 4. Schließ- und/oder Regelorgan nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der im Betriebszustand eine noch schmelzedichte Spielpassung bildende Ringspalt auf den Flächenbereich der beiden miteinander zusammenwirkenden kreiszylindrischen Dichtflächen der Feuerfestteile beschränkt ist, in dem die öffnungs- und Schließbereiche der beiden Feuerfestteile liegen.4. Closing and / or regulating element according to claim 1 or 2, characterized in that the annular gap, which in the operating state forms an even more melt-tight clearance fit, is limited to the surface area of the two interacting circular-cylindrical sealing surfaces of the refractory parts, in which the opening and closing areas of the two Refractory parts lie. 5. Schließ- und/oder Regelorgan nach einem oder mehreren vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Feuerfestteile zumindest im Bereich ihrer miteinander zusammenwirkenden kreiszylindrischen Dichtflächen als zylindrische Rohre ausgebildet sind.5. Closing and / or regulating member according to one or more of the preceding claims, characterized in that the refractory parts are designed as cylindrical tubes at least in the area of their interacting circular cylindrical sealing surfaces. 6. Schließ- und/oder Regelorgan nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der im Betriebszustand eine noch schmelzedichte Spielpassung bildende Ringspalt im kalten Zustand zwischen 0,05 und 0.7 mm beträgt.6. Closing and / or regulating element according to one or more of the preceding claims, characterized in that the annular gap, which in the operating state is still a melt-tight fit, is between 0.05 and 0.7 mm in the cold state.
EP89107511A 1988-08-02 1989-04-26 Shut-off and/or control element for tapping molten metal melts from a metallurgical container Expired - Lifetime EP0356618B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89107511T ATE82173T1 (en) 1988-08-02 1989-04-26 CLOSING AND/OR CONTROLLING ORGAN FOR TAPING LIQUID METAL FROM A METALLURGICAL VESSEL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3826245 1988-08-02
DE3826245A DE3826245A1 (en) 1988-08-02 1988-08-02 CLOSING AND / OR REGULATOR FOR THE LAYER OF LIQUID METAL MELTING FROM A METALLURGICAL DANGER

Publications (2)

Publication Number Publication Date
EP0356618A1 true EP0356618A1 (en) 1990-03-07
EP0356618B1 EP0356618B1 (en) 1992-11-11

Family

ID=6360094

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89107511A Expired - Lifetime EP0356618B1 (en) 1988-08-02 1989-04-26 Shut-off and/or control element for tapping molten metal melts from a metallurgical container

Country Status (13)

Country Link
US (1) US4966314A (en)
EP (1) EP0356618B1 (en)
JP (1) JP2764615B2 (en)
KR (1) KR960013887B1 (en)
CN (1) CN1019458B (en)
AT (1) ATE82173T1 (en)
BR (1) BR8903810A (en)
CA (1) CA1340550C (en)
DE (2) DE3826245A1 (en)
ES (1) ES2035411T3 (en)
GR (1) GR3006459T3 (en)
SU (1) SU1722220A3 (en)
ZA (1) ZA893952B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0423450A2 (en) * 1989-10-17 1991-04-24 Didier-Werke Ag Shut-off and/or control element for a metallurgical container
EP0429860A2 (en) * 1989-11-28 1991-06-05 Didier-Werke Ag Shut-off and/or control element
WO2011009579A1 (en) 2009-07-20 2011-01-27 Fuchs Technology Holding Ag Sealing and filling device for a metallurgical furnace, metallurgical furnace, and method for tapping the metallurgical furnace.
DE102009033934B3 (en) * 2009-07-20 2011-02-03 Fuchs Technology Holding Ag Device for temporarily sealing a tap hole, which has a first internal diameter and is provided in the bottom of a metallurgical furnace, for filling the tap hole with free-flowing fire-resistant compound, comprises sealing and filling pipe

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3934601C1 (en) * 1989-10-17 1990-10-04 Didier-Werke Ag, 6200 Wiesbaden, De
US5230813A (en) * 1989-11-28 1993-07-27 Didier-Werke Ag Stator and rotor members for use in apparatus for closing and/or regulating the discharge or tapping of molten metal
DE19543058C2 (en) * 1995-11-10 2001-01-04 Sms Demag Ag Method and device for closing a tap hole
CN106323009A (en) * 2016-09-17 2017-01-11 天津立中汽车铝合金配件有限公司 Molten aluminum discharging device of hub casting and melting furnace
CN106247806A (en) * 2016-09-17 2016-12-21 天津立中汽车铝合金配件有限公司 A kind of aluminum liquid stream rotary device for wheel hub casting
CN115289222A (en) * 2022-07-17 2022-11-04 罗托布斯特(上海)氢能科技有限公司 Molten metal injection valve

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DE1558285A1 (en) * 1921-05-15 1970-05-06 Weinreich Dr Ing Wolfgang Bottom closure for pouring pans
LU67368A1 (en) * 1972-04-08 1973-06-18
DE3540202C1 (en) * 1985-11-13 1986-11-27 Brown, Boveri & Cie Ag, 6800 Mannheim Inflow regulating element for mould level control in a continuous casting plant

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JPS5731497A (en) * 1980-08-04 1982-02-19 Metsukusu:Kk Fitting structure of raw liquid supply block or the like in filter press
SU1072995A1 (en) * 1982-08-25 1984-02-15 Алтайский Ордена Ленина Тракторный Завод Им.М.И.Калинина Wicket taper refractory gate
JPS59157756U (en) * 1983-04-04 1984-10-23 住友金属工業株式会社 tandateshiyu
JPS617563U (en) * 1984-06-20 1986-01-17 三建産業株式会社 Continuous heating furnace fitting skid
JPS61238909A (en) * 1985-04-13 1986-10-24 Kurosaki Refract Co Ltd Lance for treating molten metal
ATE83957T1 (en) * 1987-08-03 1993-01-15 Didier Werke Ag ROTARY CAP FOR A METALLURGICAL VESSEL AND ROTOR OR. STATOR FOR SUCH ROTARY LOCK.
DE3731600A1 (en) * 1987-09-19 1989-04-06 Didier Werke Ag TURNTABLE CLOSURE FOR A METALURIGAN TUBE AND ROTOR AND / OR STATOR FOR SUCH A TURNOVER

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1558285A1 (en) * 1921-05-15 1970-05-06 Weinreich Dr Ing Wolfgang Bottom closure for pouring pans
LU67368A1 (en) * 1972-04-08 1973-06-18
DE3540202C1 (en) * 1985-11-13 1986-11-27 Brown, Boveri & Cie Ag, 6800 Mannheim Inflow regulating element for mould level control in a continuous casting plant

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0423450A2 (en) * 1989-10-17 1991-04-24 Didier-Werke Ag Shut-off and/or control element for a metallurgical container
EP0423450A3 (en) * 1989-10-17 1992-04-08 Didier-Werke Ag Shut-off and/or control element for a metallurgical container
EP0429860A2 (en) * 1989-11-28 1991-06-05 Didier-Werke Ag Shut-off and/or control element
EP0429860A3 (en) * 1989-11-28 1992-04-15 Didier-Werke Ag Shut-off and/or control element
WO2011009579A1 (en) 2009-07-20 2011-01-27 Fuchs Technology Holding Ag Sealing and filling device for a metallurgical furnace, metallurgical furnace, and method for tapping the metallurgical furnace.
DE102009033934B3 (en) * 2009-07-20 2011-02-03 Fuchs Technology Holding Ag Device for temporarily sealing a tap hole, which has a first internal diameter and is provided in the bottom of a metallurgical furnace, for filling the tap hole with free-flowing fire-resistant compound, comprises sealing and filling pipe

Also Published As

Publication number Publication date
JP2764615B2 (en) 1998-06-11
KR960013887B1 (en) 1996-10-10
CA1340550C (en) 1999-05-18
US4966314A (en) 1990-10-30
ATE82173T1 (en) 1992-11-15
SU1722220A3 (en) 1992-03-23
DE3826245C2 (en) 1991-05-23
DE3826245A1 (en) 1990-02-08
GR3006459T3 (en) 1993-06-21
KR900002869A (en) 1990-03-23
EP0356618B1 (en) 1992-11-11
JPH0270374A (en) 1990-03-09
ES2035411T3 (en) 1993-04-16
CN1019458B (en) 1992-12-16
DE58902680D1 (en) 1992-12-17
ZA893952B (en) 1990-02-28
BR8903810A (en) 1990-03-20
CN1039748A (en) 1990-02-21

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