EP0138802A1 - Horizontal continuous casting mould - Google Patents

Horizontal continuous casting mould Download PDF

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Publication number
EP0138802A1
EP0138802A1 EP84890184A EP84890184A EP0138802A1 EP 0138802 A1 EP0138802 A1 EP 0138802A1 EP 84890184 A EP84890184 A EP 84890184A EP 84890184 A EP84890184 A EP 84890184A EP 0138802 A1 EP0138802 A1 EP 0138802A1
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EP
European Patent Office
Prior art keywords
continuous casting
horizontal continuous
casting mold
inlet
front part
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Granted
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EP84890184A
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German (de)
French (fr)
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EP0138802B1 (en
Inventor
Günter Dipl.-Ing. Holleis
Horst Dipl.-Ing. Wiesinger
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Voestalpine AG
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Voestalpine AG
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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
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/045—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for horizontal casting
    • B22D11/047—Means for joining tundish to mould
    • 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
    • B22D11/14—Plants for continuous casting
    • B22D11/143—Plants for continuous casting for horizontal casting

Definitions

  • the invention relates to a horizontal continuous casting mold, in particular for continuous steel casting, with an inlet part formed from refractory material on the inlet side, which can be connected in a sealing manner to a storage vessel for the melt, and with a continuous mold cavity which adjoins the inlet part and forms a continuous stepless cavity with internal cooling, preferably from Copper or a copper alloy formed mold main body.
  • a horizontal continuous casting mold without such radial cooling surfaces is known from DE-OS 25 20 091.
  • DE-OS 25 20 091 When operating a horizontal continuous casting mold, this However, due to the lack of a radial cooling surface, it is not possible to ensure the formation of the strand shell at a specific point in the longitudinal extent of the horizontal continuous casting mold, in particular in the inlet part.
  • the formation of the strand shell depends on a large number of parameters, such as the temperature of the melt in the storage vessel, the strand pull-out speed, the chemical composition of the melt to be cast and the heat removal due to the internal cooling of the main mold body.
  • the strand shell forms too early and grows beyond the inlet part, which can lead to tearing or tearing of the strand shell when the strand is pulled out. Furthermore, there is the risk that the strand shell only forms in the area at the connection point extending in the radial direction between the inlet part and the main mold body, as a result of which the connection point is affected by melt or melt can penetrate into a gap occurring at this connection point. which can lead to the destruction of the horizontal continuous casting mold or to tearing of the continuous shell.
  • the invention aims at avoiding these disadvantages and difficulties and has as its object to create a horizontal continuous casting mold of the type described in the introduction, in which the start of the continuous shell can be clearly defined at the desired location.
  • the inlet front part is provided with a heating device, and that between the heating device and the end of the strand lying in the pull-out direction Inlet part means for locating the strand shell formed, preferably a temperature measuring device, is provided.
  • the start of the strand shell growth can be determined in a transverse plane within the length of the inlet part.
  • the device for recognizing the strand shell enables the position of the start of shell growth to be monitored. As soon as this device gives a false indication, i.e. indicates the absence of a shell, the cooling in the mold wall is increased and the heat supplied via the heating device is reduced, etc. until the tray display device reports the presence of a tray again. If, according to the display of the device for locating the strand shell, this is already too strong - from which it follows that the beginning of the shell growth is too far on the input side of the horizontal continuous casting mold - the heat supplied via the heating device is intensified.
  • the inlet part has a sleeve provided in the pull-out direction of the strand, the wall thickness of which is less than the wall thickness of the front part of the inlet part, which sleeve is inserted into a recess provided on the end face of the main mold body and the outer surface of the sleeve on the annular Recess in the longitudinal direction of the horizontal continuous casting mold, the temperature measuring device is arranged within the sleeve net, wherein a heat insulating body is advantageously provided between the heating device and the temperature measuring device.
  • the heating device expediently being distributed over the length of the inlet front part and can be switched on and off individually arranged heater parts is formed.
  • the horizontal continuous casting mold With the horizontal continuous casting mold according to the invention, it is possible to continuously pull the strand out of the horizontal continuous casting mold, the horizontal continuous casting mold being drivable by means of an oscillating device. This eliminates the hitherto complicated, discontinuous pulling device for the strand.
  • the inlet front part expediently has a sliding surface on its peripheral outside and is surrounded by a pipe socket rigidly fastened to the storage vessel, the pipe socket advantageously having at least one circumferential groove on its mating sliding surface resting on the sliding surface of the inlet front part, into which at least one inert Gas supply line opens.
  • the circumferential groove is expediently filled with porous, refractory material.
  • Fig. 1 shows a schematic representation of a section through a horizontal continuous casting mold
  • Fig. 2 shows a diagram of the heat removal or the thermal conductivity for this mold
  • Fig. 3 shows a detail of Fig. 1 on a larger scale.
  • molten steel 3 is allowed to flow into a storage vessel 4, which is also called a distributor, via a pouring tube 2.
  • the storage vessel 4 is provided with a heating device (not shown) and has a heat-insulating jacket 5.
  • An outlet opening 7 for the molten steel 3 is provided on a vertical side wall 6 of the storage vessel 4, to which a short pipe socket 9 is connected by means of a flange 8.
  • a seal 10 is inserted between the flange 8 and the vertical side wall 6 of the storage vessel 4.
  • a first mold part which forms the inlet part 11 for the horizontal continuous casting mold, is inserted in the pipe socket 9 so as to be axially displaceable.
  • This inlet part 11 has an inner diameter 12 that is smaller than that (13) of the outlet opening 7 of the storage vessel 4.
  • the pipe socket 9 is provided on the inside with two circumferential grooves 15, which are filled with porous, refractory material 16 for the purpose of sealing. Lines 17 supplying inert gas open into these grooves 15.
  • the inlet part 11 which is formed from refractory material, is uncooled and essentially has two integrally connected parts 18, 19, namely an inlet front part 18 and a sleeve 19 extending the inlet front part 18.
  • the sleeve 19 has the same inner diameter 12 as the inlet front part 18; however, it is formed with a smaller wall thickness 20 than the inlet front part 18.
  • a In the inlet front part 18 are circumferential grooves 21 into which a heating device 22, such as. B. an electrically heated heating coil is used.
  • a heating device 22 such as. B. an electrically heated heating coil is used.
  • four heating coils are arranged one behind the other over the length 23 of the inlet front part 18. Each of the heating coils can be switched on and off and regulated separately from the others.
  • a device for locating the strand shell 24 formed by the molten steel is used, which is designed as a temperature sensor 25 in the exemplary embodiment shown.
  • a heat-insulating body 26 is provided between the temperature sensor 25 and the heating device 22, which ends at a distance from the inner surface 27 of the inlet part 11 and largely prevents the heating device from influencing the temperature sensor.
  • a second mold part adjoins the inlet part 11, specifically a mold main body 28 made of copper or a copper alloy, which is provided with channels for internal cooling.
  • This mold main body 28 has an annular recess 29 for receiving the sleeve 19, wherein in the case of assembled mold parts 11 and 28 the longitudinally extending outer surface 30 of the sleeve 19 touches the annular recess 29.
  • the radially directed connection surfaces 31, 32 of the recess 29 and the sleeve 19 rest against one another without a gap.
  • the inner surface 33 of the main mold body 28 has the same diameter 12 as the inner surface 27 of the inlet part 11, so that a stepless mold cavity 34 is formed by these two parts 11 and 28.
  • further mold parts for example aftercoolers 35 provided with internal cooling, one of which is shown in FIG. 1, can be connected to the main mold body 28 with or without a distance from the main mold body 28 extending in the longitudinal direction.
  • the temperature sensor 25 indicates a higher temperature as soon as steel melt 3 reaches the sleeve 19. In this case, the cooling of the main mold body 28 is intensified and the heating of the on running part 11, at least with the temperature sensor 25 adjacent heating coils reduced or switched off.
  • the strand shell 24 is in the range of 25 Tem p eraturmeßmonilers stronger and there is a temperature drop, which is registered by temperature sensor 25th In this case, the heating in the inlet part 11 is intensified and, if necessary, the cooling of the main mold body 28 is reduced at the same time.
  • the inlet part 11 have a low thermal conductivity and the mold main body 28 have a high thermal conductivity. Accordingly, the heat removal from strand heat in the area of the inlet part 11 is very low. It only rises sharply in the area of the relatively thin-walled sleeve 19, which slope 37 is responsible for the start of the formation of the strand shell 24. With the heating device installed on the inlet part 11, this increase 37 of the heat removal can be moved in the direction of the longitudinal axis of the horizontal continuous casting mold.
  • the invention is not limited to the embodiment shown in the drawing, but can be modified in various ways.
  • other devices for locating the strand shell 24 formed can be provided, such as. B. strain gauges or ultrasonic transmitters and receivers.
  • the heating device of the inlet front part can also be formed by a heating coil provided spirally in the inlet part 11.
  • the invention can also be implemented for differently shaped cross-sectional shapes of the mold cavity 34.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Abstract

1. A horizontal continuous casting mould, in particular for continuously casting steel, comprising a feed section (11) formed of refractory material on the feed side, which is sealingly connectable to a storage vessel (4) for the melt (3), and a mould main body (28) alignedly abutting on the feed section (11), forming a steplessly through-going mould cavity (34), provided with an internal cooling and preferably made of copper or a copper alloy, characterised in that the feed section front part (18) is provided with a heating means (22), and that a means (25) for detecting the formed strand skin (24), preferably a temperature measuring means, is provided between the heating means (22) and the end of the feed section (11) lying in the strand extraction direction.

Description

Die Erfindung betrifft eine Horizontalstranggießkokille, insbesondere zum Stahlstranggießen, mit einem einlaufseitig aus feuerfestem Material gebildeten Einlaufteil, der dichtend an ein Vorratsgefäß für die Schmelze anschließbar ist, und einem an den Einlaufteil fluchtend anschließenden und durchgehend stufenlosen Kokillenhohlraum bildenden, mit einer Innenkühlung versehenen, vorzugsweise aus Kupfer oder einer Kupferlegierung gebildeten Kokillenhauptkörper.The invention relates to a horizontal continuous casting mold, in particular for continuous steel casting, with an inlet part formed from refractory material on the inlet side, which can be connected in a sealing manner to a storage vessel for the melt, and with a continuous mold cavity which adjoins the inlet part and forms a continuous stepless cavity with internal cooling, preferably from Copper or a copper alloy formed mold main body.

Bei Horizontalstranggießanlagen ist es üblich (US-PS 3 329 200, FR-PS 1 522 983 und DE-PS 20 58 051), das einlaufseitige Ende der Kokille mit einer radial gerichteten Kühlfläche auszustatten. Diese Art der Kokillenausbildung hat den Nachteil, daß der Strang von dieser radialen Kühlfläche wegbewegt werden muß bzw. daß nur eine minimale Rückbewegung in der Größenordnung der Schrumpfung des Stranges in seiner Längsrichtung gestattet ist. Ein weiterer Nachteil der radialen Kühlfläche ist, daß das Schalenwachstum mit einem sägezahnähnlichen Profil erfolgt. Das sägezahn- ähnliche Schalenwachstum erfordert, daß im Auszugszyklus eine Pausenzeit vorgesehen ist, welche ein ausreichendes Schalenwachstum im schwächsten Schalenquerschnitt gewährleistet. Diese spezifische Art der Auszugsbewegung erfordert eine sehr komplizierte Auszugseinrichtung zum Ausziehen des Stranges.In horizontal continuous casting plants, it is customary (US Pat. No. 3,329,200, FR Pat. No. 1,522,983 and German Pat. No. 2,058,051) to equip the inlet-side end of the mold with a radially directed cooling surface. This type of mold formation has the disadvantage that the strand has to be moved away from this radial cooling surface or that only a minimal backward movement in the order of the shrinkage of the strand in its longitudinal direction is permitted. Another disadvantage of the radial cooling surface is that the shell growth takes place with a sawtooth-like profile. The sawtooth-like shell growth requires that a pause time is provided in the pull-out cycle, which ensures sufficient shell growth in the weakest shell cross-section. This specific type of pull-out movement requires a very complicated pull-out device for pulling out the strand.

Zur Vermeidung dieser Nachteile hat man versucht, Horizontalstranggießkokillen ohne radial gerichtete Kühlflächen einzusetzen. Eine Horizontalstranggießkokille ohne solche radiale Kühlflächen gemäß der eingangs beschriebenen Art ist aus der DE-OS 25 20 091 bekannt. Beim Betrieb einer Horizontalstranggießkokille dieser Art ist es jedoch infolge des Fehlens einer radialen Kühlfläche nicht möglich, die Bildung der Strangschale an einer bestimmten Stelle der Längserstreckung der Horizontalstranggießkokille, insbesondere im Einlaufteil, sicherzustellen. Die Bildung der Strangschale hängt nämlich von einer Vielzahl von Parametern ab, wie z.B. von der Temperatur der Schmelze im Vorratsgefäß, der Strangausziehgeschwindigkeit, der chemischen Zusammensetzung der zu vergießenden Schmelze und dem Wärmeentzug durch die Innenkühlung des Kokillenhauptkörpers.To avoid these disadvantages, attempts have been made to use horizontal continuous casting molds without radially directed cooling surfaces. A horizontal continuous casting mold without such radial cooling surfaces according to the type described above is known from DE-OS 25 20 091. When operating a horizontal continuous casting mold, this However, due to the lack of a radial cooling surface, it is not possible to ensure the formation of the strand shell at a specific point in the longitudinal extent of the horizontal continuous casting mold, in particular in the inlet part. The formation of the strand shell depends on a large number of parameters, such as the temperature of the melt in the storage vessel, the strand pull-out speed, the chemical composition of the melt to be cast and the heat removal due to the internal cooling of the main mold body.

So ist es bei der bekannten Horizontalstranggießkokille möglich, daß die Strangschale sich bereits zu früh bildet und über den Einlaufteil hinauswächst, wodurch es beim Ausziehen des Stranges zum Aufreißen bzw. Abreißen der Strangschale kommen kann. Weiters besteht die Gefahr, daß sich die Strangschale erst im Bereich bei der sich in radialer Richtung erstreckenden Anschlußstelle zwischen dem Einlaufteil und dem Kokillenhauptkörper bildet, wodurch die Anschlußstelle durch Schmelze in Mitleidenschaft gezogen wird bzw. Schmelze in einen an dieser Anschlußstelle auftretenden Spalt eindringen kann, was zu einer Zerstörung der Horizontalstranggießkokille bzw. ebenfalls zu einem Abreißen der Strangschale führen kann.So it is possible with the known horizontal continuous casting mold that the strand shell forms too early and grows beyond the inlet part, which can lead to tearing or tearing of the strand shell when the strand is pulled out. Furthermore, there is the risk that the strand shell only forms in the area at the connection point extending in the radial direction between the inlet part and the main mold body, as a result of which the connection point is affected by melt or melt can penetrate into a gap occurring at this connection point. which can lead to the destruction of the horizontal continuous casting mold or to tearing of the continuous shell.

Die Erfindung bezweckt die Vermeidung dieser Nachteile und Schwierigkeiten und stellt sich die Aufgabe, eine Horizontalstranggießkokille der eingangs beschriebenen Art zu schaffen, bei der der Strangschalenbeginn eindeutig an der gewünschten Stelle festlegbar ist.The invention aims at avoiding these disadvantages and difficulties and has as its object to create a horizontal continuous casting mold of the type described in the introduction, in which the start of the continuous shell can be clearly defined at the desired location.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Einlaufvorderteil mit einer Heizeinrichtung versehen ist, und daß zwischen der Heizeinrichtung und dem in Ausziehrichtung des Stranges liegenden Ende des Einlaufteiles eine Einrichtung zum Orten der gebildeten Strangschale, vorzugsweise eine Temperaturmeßeinrichtung, vorgesehen ist.This object is achieved in that the inlet front part is provided with a heating device, and that between the heating device and the end of the strand lying in the pull-out direction Inlet part means for locating the strand shell formed, preferably a temperature measuring device, is provided.

Durch Steuern der im Einlaufvorderteil vorgesehenen Heizeinrichtung und der im Kokillenhauptkörper vorgesehenen Kühlung läßt sich der Beginn des Strangschalenwachstums in einer Querebene innerhalb der Länge des Einlaufteiles festlegen. Die Einrichtung zum Erkennen der Strangschale ermöglicht eine Überwachung der Lage des Beginns des Schalenwachstums. Sobald diese Einrichtung eine Fehlanzeige gibt, also das Fehlen einer Schale anzeigt, wird die Kühlung in der Kokillenwand verstärkt und die über die Heizeinrichtung zugeführte Wärme reduziert, u.zw. so lange bis die Schalenanzeigeeinrichtung wieder das Vorhandensein einer Schale meldet. Ist gemäß der Anzeige der Einrichtung zum Orten der Strangschale diese bereits zu stark - woraus folgt, daß der Beginn des Schalenwachstums zu weit an der Eingangsseite der Horizontalstranggießkokille liegt - wird die über die Heizeinrichtung zugeführte Wärme intensiviert.By controlling the heating device provided in the front inlet part and the cooling provided in the main mold body, the start of the strand shell growth can be determined in a transverse plane within the length of the inlet part. The device for recognizing the strand shell enables the position of the start of shell growth to be monitored. As soon as this device gives a false indication, i.e. indicates the absence of a shell, the cooling in the mold wall is increased and the heat supplied via the heating device is reduced, etc. until the tray display device reports the presence of a tray again. If, according to the display of the device for locating the strand shell, this is already too strong - from which it follows that the beginning of the shell growth is too far on the input side of the horizontal continuous casting mold - the heat supplied via the heating device is intensified.

Gemäß einer bevorzugten Ausführungsform, bei der der Einlaufteil eine in Ausziehrichtung des Stranges vorgesehene Manschette aufweist, deren Wandstärke geringer ist als die Wandstärke des Vorderteiles des Einlaufteiles, welche Manschette in eine stirnseitig vorgesehene Ausnehmung des Kokillenhauptkörpers eingesetzt ist und wobei die Außenfläche der Manschette an der ringförmigen Ausnehmung in Längsrichtung der Horizontalstranggießkokille anliegt, ist die Temperaturmeßeinrichtung innerhalb der Manschette angeord
net, wobei vorteilhaft zwischen der Heizeinrichtung und der Temperaturmeßeinrichtung ein wärmeisolierender Körper vorgesehen ist.According to a preferred embodiment, in which the inlet part has a sleeve provided in the pull-out direction of the strand, the wall thickness of which is less than the wall thickness of the front part of the inlet part, which sleeve is inserted into a recess provided on the end face of the main mold body and the outer surface of the sleeve on the annular Recess in the longitudinal direction of the horizontal continuous casting mold, the temperature measuring device is arranged within the sleeve
net, wherein a heat insulating body is advantageously provided between the heating device and the temperature measuring device.

Um die Bildung der Strangschale besonders genau verfolgen und festlegen zu können, sind vorteilhaft über die Länge des Einlaufvorderteiles verteilt mehrere Einrichtungen zum Orten der gebildeten Strangschale im Abstand voneinander vorgesehen, wobei zweckmäßig die Heizeinrichtung aus einzeln zu- und abschaltbaren, über die Länge des Einlaufvorderteiles verteilt angeordneten Heizeinrichtungsteilen gebildet ist.In order to be able to track and determine the formation of the strand shell particularly precisely, several devices for locating the strand shell formed are advantageously spaced apart from one another over the length of the inlet front part, with the heating device expediently being distributed over the length of the inlet front part and can be switched on and off individually arranged heater parts is formed.

Mit der erfindungsgemäßen Horizontalstranggießkokille ist es möglich, den Strang kontinuierlich aus der Horizontalstranggießkokille auszuziehen, wobei die Horizontalstranggießkokille mittels einer Oszilliereinrichtung antreibbar ist. Dadurch entfällt die bisher übliche komplizierte diskontinuierlich arbeitende Auszieheinrichtung für den Strang.With the horizontal continuous casting mold according to the invention, it is possible to continuously pull the strand out of the horizontal continuous casting mold, the horizontal continuous casting mold being drivable by means of an oscillating device. This eliminates the hitherto complicated, discontinuous pulling device for the strand.

Für eine oszillierende Horizontalstranggießkokille weist zweckmäßig der Einlaufvorderteil an seiner peripheren Außenseite eine Gleitfläche auf und ist von einem am Vorratsgefäß starr befestigten Rohrstutzen umgeben, wobei vorteilhaft der Rohrstutzen an seiner an der Gleitfläche des Einlaufvorderteiles anliegenden Gegengleitfläche mindestens eine umlaufende Nut aufweist, in die mindestens eine inertes Gas zuführende Leitung mündet.For an oscillating horizontal continuous casting mold, the inlet front part expediently has a sliding surface on its peripheral outside and is surrounded by a pipe socket rigidly fastened to the storage vessel, the pipe socket advantageously having at least one circumferential groove on its mating sliding surface resting on the sliding surface of the inlet front part, into which at least one inert Gas supply line opens.

Zweckmäßig ist die umlaufende Nut mit porösem, feuerfestem Material ausgefüllt.The circumferential groove is expediently filled with porous, refractory material.

Die Erfindung ist nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert, wobei Fig. 1 in schematischer Darstellung einen Schnitt durch eine Horizontalstranggießkokille, Fig. 2 ein Diagramm des Wärmeentzuges bzw. der Wärmeleitfähigkeit für diese Kokille und Fig. 3 ein Detail der Fig. 1 in größerem Maßstab zeigen.The invention is based on a in the drawing tion illustrated embodiment, wherein Fig. 1 shows a schematic representation of a section through a horizontal continuous casting mold, Fig. 2 shows a diagram of the heat removal or the thermal conductivity for this mold and Fig. 3 shows a detail of Fig. 1 on a larger scale.

Aus einer Pfanne 1 wird über ein Gießrohr 2 Stahlschmelze 3 in ein Vorratsgefäß 4, welches auch Verteiler genannt ist, einfließen gelassen. Das Vorratsgefäß 4 ist mit einer nicht dargestellten Heizeinrichtung versehen und weist eine wärmeisolierende Ummantelung 5 auf. An einer vertikalen Seitenwand 6 des Vorratsgefäßes 4 ist eine Austrittsöffnung 7 für die Stahlschmelze 3 vorgesehen, an die mittels eines Flansches 8 ein kurzer Rohrstutzen 9 angeschlossen ist. Zwischen dem Flansch 8 und der vertikalen Seitenwand 6 des Vorratsgefäßes 4 ist eine Dichtung lO eingesetzt.From a pan 1, molten steel 3 is allowed to flow into a storage vessel 4, which is also called a distributor, via a pouring tube 2. The storage vessel 4 is provided with a heating device (not shown) and has a heat-insulating jacket 5. An outlet opening 7 for the molten steel 3 is provided on a vertical side wall 6 of the storage vessel 4, to which a short pipe socket 9 is connected by means of a flange 8. A seal 10 is inserted between the flange 8 and the vertical side wall 6 of the storage vessel 4.

In dem Rohrstutzen 9 ist ein erster Kokillenteil, der den Einlaufteil 11 für die Horizontalstranggießkokille bildet, axial verschiebbar eingesetzt. Dieser Einlaufteil 11 weist einen Innendurchmesser 12 auf, der kleiner ist als der(13) der Austrittsöffnung 7 des Vorratsgefäßes 4.A first mold part, which forms the inlet part 11 for the horizontal continuous casting mold, is inserted in the pipe socket 9 so as to be axially displaceable. This inlet part 11 has an inner diameter 12 that is smaller than that (13) of the outlet opening 7 of the storage vessel 4.

Zwischen dem Rohrstutzen 9 und der Außenmantelfläche 14 des Einlaufteiles 11 ist zwecks Abdichtung der Rohrstutzen 9 innenseitig mit zwei umlaufenden Nuten 15 versehen, die mit porösem, feuerfestem Material 16 ausgefüllt sind. In diese Nuten 15 münden inertes Gas zuführende Leitungen 17.Between the pipe socket 9 and the outer surface 14 of the inlet part 11, the pipe socket 9 is provided on the inside with two circumferential grooves 15, which are filled with porous, refractory material 16 for the purpose of sealing. Lines 17 supplying inert gas open into these grooves 15.

Der Einlaufteil 11, der aus feuerfestem Material gebildet ist, ist ungekühlt und weist im wesentlichen zwei integral zusammenhängende Teile 18, 19 auf, und zwar einen Einlaufvorderteil 18 und eine den Einlaufvorderteil 18 verlängernde Manschette 19. Die Manschette 19 weist den gleichen Innendurchmesser 12 wie der Einlaufvorderteil 18 auf; sie ist jedoch in geringerer Wandstärke 20 ausgebildet als der Einlaufvorderteil 18.The inlet part 11, which is formed from refractory material, is uncooled and essentially has two integrally connected parts 18, 19, namely an inlet front part 18 and a sleeve 19 extending the inlet front part 18. The sleeve 19 has the same inner diameter 12 as the inlet front part 18; however, it is formed with a smaller wall thickness 20 than the inlet front part 18.

a In den Einlaufvorderteil 18 sind umlaufende Nuten 21 eingearbeitet, in die eine Heizeinrichtung 22, wie z. B.eine elektrisch beheizte Heizspule eingesetzt ist. Beim dargestellten Ausführungsbeispiel sind über die Länge 23 des Einlaufvorderteiles 18 vier Heizspulen hintereinander angeordnet. Jede der Heizspulen ist getrennt von den übrigen ein- und ausschaltbar und regelbar.a In the inlet front part 18 are circumferential grooves 21 into which a heating device 22, such as. B. an electrically heated heating coil is used. In the illustrated embodiment, four heating coils are arranged one behind the other over the length 23 of the inlet front part 18. Each of the heating coils can be switched on and off and regulated separately from the others.

In der Manschette 19 ist eine Einrichtung zum Orten der von der Stahlschmelze gebildeten Strangschale 24 eingesetzt, die beim dargestellten Ausführungsbeispiel als Temperaturmeßfühler 25 ausgebildet ist. Zwischen dem Temperaturmeßfühler 25 und der Heizeinrichtung 22 ist ein wärmeisolierender Körper 26 vorgesehen, der im Abstand von der Innenfläche 27 des Einlaufteiles 11 endet und eine Beeinflussung des Temperaturmeßfühlers durch die Heizeinrichtung weitestgehend verhindert.In the sleeve 19, a device for locating the strand shell 24 formed by the molten steel is used, which is designed as a temperature sensor 25 in the exemplary embodiment shown. A heat-insulating body 26 is provided between the temperature sensor 25 and the heating device 22, which ends at a distance from the inner surface 27 of the inlet part 11 and largely prevents the heating device from influencing the temperature sensor.

An den Einlaufteil 11 schließt ein zweiter Kokillenteil an, und zwar ein aus Kupfer oder einer Kupferlegierung gebildeter Kokillenhauptkörper 28, der mit Kanälen für eine Innenkühlung versehen ist. Dieser Kokillenhauptkörper 28 weist zur Aufnahme der Manschette 19 eine ringförmige Ausnehmung 29 auf, wobei bei zusammengebauten Kokillenteilen 11 und 28 die sich in Längsrichtung erstreckende Außenfläche 30 der Manschette 19 an der ringförmigen Ausnehmung 29 berührend anlegt. Die radial gerichteten Anschlußflächen 31, 32 der Ausnehmung 29 und der Manschette 19 liegen spaltfrei aneinander an.A second mold part adjoins the inlet part 11, specifically a mold main body 28 made of copper or a copper alloy, which is provided with channels for internal cooling. This mold main body 28 has an annular recess 29 for receiving the sleeve 19, wherein in the case of assembled mold parts 11 and 28 the longitudinally extending outer surface 30 of the sleeve 19 touches the annular recess 29. The radially directed connection surfaces 31, 32 of the recess 29 and the sleeve 19 rest against one another without a gap.

Die Innenfläche 33 des Kokillenhauptkörpers 28 weist den gleichen Durchmesser 12 auf wie die Innenfläche 27 des Einlaufteiles 11, sodaß von diesen beiden Teilen 11 und 28 ein stufenloser Kokillenhohlraum 34 gebildet ist.The inner surface 33 of the main mold body 28 has the same diameter 12 as the inner surface 27 of the inlet part 11, so that a stepless mold cavity 34 is formed by these two parts 11 and 28.

An den Kokillenhauptkörper 28 können je nach Bedarf weitere Kokillenteile, beispielsweise mit einer Innenkühlung versehene Nachkühler 35, von denen einer in Fig. 1 dargestellt ist, mit oder ohne sich in Längsrichtung erstreckender Distanz zum Kokillenhauptkörper 28 anschließen.Depending on requirements, further mold parts, for example aftercoolers 35 provided with internal cooling, one of which is shown in FIG. 1, can be connected to the main mold body 28 with or without a distance from the main mold body 28 extending in the longitudinal direction.

Die Funktion der Einrichtung ist folgende:

  • Mittels der Heizeinrichtung 22 wird die Temperatur bzw. der Entzug von Wärme des Stranges durch den Einlaufteil 11 derart geregelt, daß sich die Strangschale 24 im Bereich des Übergangs der Manschette 19 zum Einlaufvorderteil 18 zu bilden beginnt. Mittels des Temperaturmeßfühlers 25 läßt sich die gebildete Strangschale 24 orten, da die Höhe der Temperatur im Bereich der Manschette 19 davon abhängt, ob die Manschette von einer Strangschale 24 bedeckt ist oder nicht.
The function of the facility is as follows:
  • By means of the heating device 22, the temperature or the removal of heat from the strand by the inlet part 11 is regulated in such a way that the strand shell 24 begins to form in the region of the transition from the sleeve 19 to the inlet front part 18. The strand shell 24 formed can be located by means of the temperature sensor 25, since the height of the temperature in the region of the sleeve 19 depends on whether the sleeve is covered by a strand shell 24 or not.

Wandert der Bereich 36 des Beginns der Strangschalenbildung in Richtung zum Kokillenhauptkörper 28, so zeigt der Temperaturmeßfühler 25 eine höhere Temperatur an, sobald Stahlschmelze 3 zur Manschette 19 gelangt. In diesem Fall wird die Kühlung des Kokillenhauptkörpers 28 intensiviert und die Heizung des Einlaufteiles 11, zumindest bei den dem Temperaturmeßfühler 25 benachbarten Heizspulen herabgesetzt bzw. abgeschaltet.If the region 36 of the start of the strand shell formation moves in the direction of the main mold body 28, the temperature sensor 25 indicates a higher temperature as soon as steel melt 3 reaches the sleeve 19. In this case, the cooling of the main mold body 28 is intensified and the heating of the on running part 11, at least with the temperature sensor 25 adjacent heating coils reduced or switched off.

Wandert hingegen der Bereich 36 des Beginns der Strangschalenbildung zum Vorratsgefäß 4, wird die Strangschale 24 im Bereich des Temperaturmeßfühlers 25 stärker und es kommt zu einem Temperaturabfall, der vom Temperaturmeßfühler 25 registriert wird. In diesem Fall wird die Heizung im Einlaufteil 11 intensiviert und erforderlichenfalls gleichzeitig die Kühlung des Kokillenhauptkörpers 28 vermindert.However, travels to the region 36 of the start of the strand shell formation for the storage vessel 4, the strand shell 24 is in the range of 25 Tem p eraturmeßfühlers stronger and there is a temperature drop, which is registered by temperature sensor 25th In this case, the heating in the inlet part 11 is intensified and, if necessary, the cooling of the main mold body 28 is reduced at the same time.

Aus Fig. 2 ist ersichtlich, daß der Einlaufteil 11 eine geringe Wärmeleitfähigkeit und der Kokillenhauptkörper 28 eine hohe Wärmeleitfähigkeit aufweisen. Dementsprechend ist auch der Wärmeentzug von Strangwärme im Bereich des Einlaufteiles 11 sehr gering. Er steigt erst im Bereich der relativ dünnwandigen Manschette 19 stark an, welcher Anstieg 37 für den Beginn der Bildung der Strangschale 24 verantwortlich ist. Mit der am Einlaufteil 11 installierten Heizeinrichtung läßt sich dieser Anstieg 37 des Wärmeentzuges in Richtung der Längsachse der Horizontalstranggießkokille verlegen.From Fig. 2 it can be seen that the inlet part 11 have a low thermal conductivity and the mold main body 28 have a high thermal conductivity. Accordingly, the heat removal from strand heat in the area of the inlet part 11 is very low. It only rises sharply in the area of the relatively thin-walled sleeve 19, which slope 37 is responsible for the start of the formation of the strand shell 24. With the heating device installed on the inlet part 11, this increase 37 of the heat removal can be moved in the direction of the longitudinal axis of the horizontal continuous casting mold.

Mit der erfindungsgemäßen Horizontalstranggießkokille ist es somit möglich, den Bereich 36 des Beginns der Strangschalenbildung festzulegen, sodaß die radial gerichteten Anschlußflächen 31, 32 zwischen Manschette 11 und Kokillenhauptkörper 28 von der Schmelze 3 nicht berührt werden und die radial zur Austrittsöffnung 7 des Vorratsbehälters 4 gerichtete Fläche 38 des Einlaufvorderteiles 18 niemals von einer Strangschale bedeckt werden kann.With the horizontal continuous casting mold according to the invention, it is thus possible to define the region 36 at the start of the formation of the continuous shell, so that the radially directed connection surfaces 31, 32 between the sleeve 11 and the main mold body 28 are not touched by the melt 3 and the surface directed radially to the outlet opening 7 of the storage container 4 38 of the inlet front part 18 can never be covered by a strand shell.

Die Erfindung beschränkt sich nicht auf das in der Zeichnung dargestellte Ausführungsbeispiel, sondern sie kann in verschiedener Hinsicht modifiziert werden. Beispielsweise ist es möglich, über die Länge 23 des Einlaufvorderteiles 18 mehrere Einrichtungen zum Orten der gebildeten Strangschale 24 vorzusehen. Anstelle des beim dargestellten Ausführungsbeispiel dargestellten Temperaturmeßfühlers 25 können auch andere Einrichtungen zum Orten der gebildeten Strangschale 24 vorgesehen sein, wie z. B. Dehnmeßstreifen oder Ultraschallsender- und -empfänger.The invention is not limited to the embodiment shown in the drawing, but can be modified in various ways. For example, it is possible to provide several devices for locating the strand shell 24 formed over the length 23 of the inlet front part 18. Instead of the temperature sensor 25 shown in the illustrated embodiment, other devices for locating the strand shell 24 formed can be provided, such as. B. strain gauges or ultrasonic transmitters and receivers.

Die Heizeinrichtung des Einlaufvorderteiles kann auch von einer im Einlaufteil 11 spiralförmig vorgesehenen Heizspule gebildet sein. Die Erfindung läßt sich weiters für unterschiedlich gestaltete Querschnittsformen des Kokillenhohlraumes 34 verwirklichen.The heating device of the inlet front part can also be formed by a heating coil provided spirally in the inlet part 11. The invention can also be implemented for differently shaped cross-sectional shapes of the mold cavity 34.

Claims (9)

1. Horizontalstranggießkokille, insbesondere zum Stahlstranggießen, mit einem einlaufseitig aus feuerfestem Material gebildeten Einlaufteil (11), der dichtend an ein Vorratsgefäß (4) für die Schmelze (3) anschließbar ist, und einem an den Einlaufteil (11) fluchtend anschließenden und durchgehend stufenlosen Kokillenhohlraum (34) bildenden, mit einer Innenkühlung versehenen, vorzugsweise aus Kupfer oder einer Kupferlegierung gebildeten Kokillenhauptkörper (28), dadurch gekennzeichnet, daß der Einlaufvorderteil (18) mit einer Heizeinrichtung (22) versehen ist, und daß zwischen der Heizeinrichtung (22) und dem in Ausziehrichtung des Stranges liegenden Ende des Einlaufteiles (11) eine Einrichtung (25) zum Orten der gebildeten Strangschale (24), vorzugsweise eine Temperaturmeßeinrichtung, vorgesehen ist.1. Horizontal continuous casting mold, in particular for continuous steel casting, with an inlet part (11) formed on the inlet side from refractory material, which can be sealingly connected to a storage vessel (4) for the melt (3), and one which is flush with the inlet part (11) and is continuously continuous Chill cavity (34) forming, with an internal cooling, preferably made of copper or a copper alloy, main mold body (28), characterized in that the inlet front part (18) is provided with a heating device (22), and that between the heating device (22) and A device (25) for locating the strand shell (24) formed, preferably a temperature measuring device, is provided at the end of the inlet part (11) lying in the pull-out direction of the strand. 2. Horizontalstranggießkokille nach Anspruch 1, wobei der Einlaufteil (11) eine in Ausziehrichtung des Stranges vorgesehene Manschette (19) aufweist, deren Wandstärke (20) geringer ist als die Wandstärke des Vorderteiles (18) des Einlaufteiles (11), welche Manschette (19) in eine stirnseitig vorgesehene Ausnehmung (29) des Kokillenhauptkörpers (28) eingesetzt ist und wobei die Außenfläche (30) der Manschette (19) an der ringförmigen Ausnehmung (29) in Längsrichtung der Horizontalstranggießkokille anliegt, dadurch gekennzeichnet, daß die Temperaturmeßeinrichtung (25) innerhalb der Manschette (19) angeordnet ist.2. Horizontal continuous casting mold according to claim 1, wherein the inlet part (11) has a sleeve (19) provided in the pull-out direction of the strand, the wall thickness (20) of which is less than the wall thickness of the front part (18) of the inlet part (11), which sleeve (19 ) is inserted into a recess (29) provided on the end face of the main mold body (28) and the outer surface (30) of the sleeve (19) bears against the annular recess (29) in the longitudinal direction of the horizontal continuous casting mold, characterized in that the temperature measuring device (25) is arranged within the sleeve (19). 3. Horizontalstranggießkokille nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß zwischen der Heizeinrichtung (22) und der Temperaturmeßeinrichtung (25) ein wärmeisolierender Körper (26) vorgesehen ist.3. Horizontal continuous casting mold according to claim 1 or 2, characterized in that a heat-insulating body (26) is provided between the heating device (22) and the temperature measuring device (25). 4. Horizontalstranggießkokille nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß über die Länge (23) des Einlaufvorderteiles (18) verteilt mehrere Einrichtungen (25) zum Orten der gebildeten Strangschale (24) im Abstand voneinander vorgesehen sind.4. Horizontal continuous casting mold according to claims 1 to 3, characterized in that several devices (25) for locating the formed shell (24) are provided at a distance from one another over the length (23) of the inlet front part (18). 5. Horizontalstranggießkokille nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß die Heizeinrichtung (22) aus einzeln zu- und abschaltbaren, über die Länge (23) des Einlaufvorderteiles (18) verteilt angeordneten Heizeinrichtungsteilen gebildet ist.5. Horizontal continuous casting mold according to claims 1 to 4, characterized in that the heating device (22) from individually switchable and disconnectable, over the length (23) of the inlet front part (18) distributed heating parts is formed. 6. Horizontalstranggießkokille nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, daß sie mittels einer Oszilliereinrichtung antreibbar ist.6. Horizontal continuous casting mold according to claims 1 to 5, characterized in that it can be driven by means of an oscillating device. 7. Horizontalstranggießkokille nach Anspruch 6, dadurch gekennzeichnet, daß der Einlaufvorderteil (18) an seiner peripheren Außenseite eine Gleitfläche aufweist und von einem am Vorratsgefäß (4) starr befestigten Rohrstutzen (9) umgeben ist.7. Horizontal continuous casting mold according to claim 6, characterized in that the inlet front part (18) has a sliding surface on its peripheral outside and is surrounded by a pipe socket (9) rigidly attached to the storage vessel (4). 8. Horizontalstranggießkokille nach Anspruch 7, dadurch gekennzeichnet, daß der Rohrstutzen (9) an seiner an der Gleitfläche des Einlaufvorderteiles (18) anliegenden Gegengleitfläche mindestens eine umlaufende Nut (15) aufweist, in die mindestens eine inertes Gas zuführende Leitung (17) mündet.8. Horizontal continuous casting mold according to claim 7, characterized in that the pipe socket (9) on its on the sliding surface of the inlet front part (18) adjacent sliding surface has at least one circumferential groove (15) into which at least one inert gas supply line (17) opens. 9. Horizontalstranggießkokille nach Anspruch 8, dadurch gekennzeichnet, daß die umlaufende Nut (15) mit porösem, feuerfestem Material (16) ausgefüllt ist.9. Horizontal continuous casting mold according to claim 8, characterized in that the circumferential groove (15) is filled with porous, refractory material (16).
EP19840890184 1983-10-13 1984-10-09 Horizontal continuous casting mould Expired EP0138802B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT3649/83 1983-10-13
AT0364983A AT379530B (en) 1983-10-13 1983-10-13 HORIZONTAL CONTINUOUS CASTING

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EP0138802A1 true EP0138802A1 (en) 1985-04-24
EP0138802B1 EP0138802B1 (en) 1987-05-27

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DE (1) DE3463904D1 (en)

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EP0470608A2 (en) * 1990-08-09 1992-02-12 Nippon Steel Corporation Method and apparatus for continuous casting
US5095970A (en) * 1989-06-28 1992-03-17 Wieland-Werke A.G. Continuous-casting mold for vertically casting metal strip
US5240065A (en) * 1990-12-26 1993-08-31 Sumitomo Chemical Company, Limited Continuously casting an aluminum bar having a herical contour
US5915455A (en) * 1995-09-08 1999-06-29 Norsk Hydro A.S. Apparatus, a mould and a stop procedure for horizontal direct chill casting of light metals, especially magnesium and magnesium alloys
WO2006040035A1 (en) * 2004-10-14 2006-04-20 Unilever N.V. System and process for preparing shaped solid detergent
CN103056335A (en) * 2012-12-27 2013-04-24 江苏三环实业股份有限公司 Gravity extrusion type lead belt casting machine
CN105894944A (en) * 2016-06-07 2016-08-24 辽宁科技大学 Experiment method and device for stimulating liquid steel calcium feeding line by adopting solid tracer
CN108580818A (en) * 2018-06-19 2018-09-28 沈阳麒飞新型材料科技有限公司 A kind of crystallizer of suitable production circular thin-wall base
CN108950327A (en) * 2017-05-22 2018-12-07 湖南德润有色焊材科技有限公司 A kind of process units and its workflow of aluminium alloy wlding bar base
CN113458346A (en) * 2021-06-05 2021-10-01 中铁北赛电工有限公司 Crystallizer for copper-chromium-zirconium alloy contact line
CN117961013A (en) * 2024-03-20 2024-05-03 常熟中佳新材料有限公司 Self-dehydrogenation type copper pipe horizontal continuous casting graphite crystallizer device of holding furnace

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JPH01166868A (en) * 1987-12-22 1989-06-30 Chuetsu Gokin Chuko Kk Continuous casting apparatus
KR101000027B1 (en) 2008-09-17 2010-12-09 안기현 Horizontal continuous casting apparatus

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5095970A (en) * 1989-06-28 1992-03-17 Wieland-Werke A.G. Continuous-casting mold for vertically casting metal strip
EP0470608A2 (en) * 1990-08-09 1992-02-12 Nippon Steel Corporation Method and apparatus for continuous casting
EP0470608A3 (en) * 1990-08-09 1994-09-21 Nippon Steel Corp Method and apparatus for continuous casting
US5240065A (en) * 1990-12-26 1993-08-31 Sumitomo Chemical Company, Limited Continuously casting an aluminum bar having a herical contour
US5915455A (en) * 1995-09-08 1999-06-29 Norsk Hydro A.S. Apparatus, a mould and a stop procedure for horizontal direct chill casting of light metals, especially magnesium and magnesium alloys
WO2006040035A1 (en) * 2004-10-14 2006-04-20 Unilever N.V. System and process for preparing shaped solid detergent
CN103056335A (en) * 2012-12-27 2013-04-24 江苏三环实业股份有限公司 Gravity extrusion type lead belt casting machine
CN105894944A (en) * 2016-06-07 2016-08-24 辽宁科技大学 Experiment method and device for stimulating liquid steel calcium feeding line by adopting solid tracer
CN105894944B (en) * 2016-06-07 2018-07-31 辽宁科技大学 A kind of experimental method and device for feeding calcium line using solid tracers simulation molten steel
CN108950327A (en) * 2017-05-22 2018-12-07 湖南德润有色焊材科技有限公司 A kind of process units and its workflow of aluminium alloy wlding bar base
CN108580818A (en) * 2018-06-19 2018-09-28 沈阳麒飞新型材料科技有限公司 A kind of crystallizer of suitable production circular thin-wall base
CN108580818B (en) * 2018-06-19 2023-12-08 沈阳麒飞新型材料科技有限公司 Crystallizer suitable for producing thin-wall annular blank
CN113458346A (en) * 2021-06-05 2021-10-01 中铁北赛电工有限公司 Crystallizer for copper-chromium-zirconium alloy contact line
CN117961013A (en) * 2024-03-20 2024-05-03 常熟中佳新材料有限公司 Self-dehydrogenation type copper pipe horizontal continuous casting graphite crystallizer device of holding furnace

Also Published As

Publication number Publication date
AT379530B (en) 1986-01-27
ATA364983A (en) 1985-06-15
EP0138802B1 (en) 1987-05-27
JPS60145249A (en) 1985-07-31
DE3463904D1 (en) 1987-07-02

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