EP1897636A1 - Continuous casting machine and method - Google Patents

Continuous casting machine and method Download PDF

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Publication number
EP1897636A1
EP1897636A1 EP06405379A EP06405379A EP1897636A1 EP 1897636 A1 EP1897636 A1 EP 1897636A1 EP 06405379 A EP06405379 A EP 06405379A EP 06405379 A EP06405379 A EP 06405379A EP 1897636 A1 EP1897636 A1 EP 1897636A1
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EP
European Patent Office
Prior art keywords
strand
guide rollers
casting
continuous casting
spraying
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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
EP06405379A
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German (de)
French (fr)
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EP1897636B1 (en
EP1897636B2 (en
Inventor
Christian Dratva
Franz Kawa
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SMS Concast AG
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Concast AG
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Priority to PT06405379T priority Critical patent/PT1897636E/en
Priority to DE502006004250T priority patent/DE502006004250D1/en
Priority to PL06405379T priority patent/PL1897636T3/en
Priority to SI200630434T priority patent/SI1897636T1/en
Priority to ES06405379.6T priority patent/ES2331532T5/en
Application filed by Concast AG filed Critical Concast AG
Priority to EP06405379.6A priority patent/EP1897636B2/en
Publication of EP1897636A1 publication Critical patent/EP1897636A1/en
Publication of EP1897636B1 publication Critical patent/EP1897636B1/en
Publication of EP1897636B2 publication Critical patent/EP1897636B2/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
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock
    • B22D11/208—Controlling or regulating processes or operations for removing cast stock for aligning the guide rolls
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1226—Accessories for subsequent treating or working cast stock in situ for straightening strands
    • 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
    • B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
    • B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling

Definitions

  • the invention relates to a continuous casting plant, in particular for steel long products, according to the preamble of claim 1 and a process for continuous casting according to the preamble of claim 13.
  • the liquid metal eg. As the liquid steel, filled in a cooled mold and continuously led away from this mold with shell formation as Giessstrang continuously.
  • This Giessstrang is by a further cooling device, a so-called secondary cooling, along a successively arranged guide rollers guided guideway and thereby further cooled by applying with coolants (spraying of water, water-air mixture) and contact with the guide rollers and by a radiation of heat.
  • the cooling nozzles must be accurately positioned and aligned and have the same spray characteristics, but on the other hand, an exact guidance of the casting strand along its guideway is important. As soon as an unbalanced temperature field is established in the cast strand for some reason, the strand tends to be deformed due to thermal deformation from the guideway, e.g. sideways dodge. This shift leads immediately to uneven coolant-impingement and thus further displacement of the strand from its desired position.
  • the problem is particularly critical when small-sized strands (billets, about 100-160 mm square) are poured using high-intensity spray water cooling, so-called hard cooling. Furthermore, when cast billet strands for lifting the strand come from its arcuate guideway when increased frictional forces occur in the mold area, while the relatively flexible strand is quasi stretched.
  • guide rollers which are fixed or compliant (via spring assemblies, compressed air bellows, etc.) are mounted at a predetermined minimum distance from the strand, the compliant design is practically only used on the strand top.
  • the present invention has for its object to provide a continuous casting of the type mentioned above and to propose a method for continuous casting in particular steel, with which the quality of the cast strand can be significantly improved by a precise, with respect to the strand cross-section symmetrically distributed cooling.
  • the non-productive time should be reduced when changing the casting plant to another casting format and maintenance.
  • the other guide rollers are adjustable in a direction substantially perpendicular to the corresponding Giessstrang inhabit and the contact pressure of the respective roller is adjustable to the casting strand, it is ensured that the guide rollers constantly run through the clamping of the strand and the casting strand is held in its desired position in the guideway.
  • the risk of thermal overloading of the rollers and damage to the strand surface is significantly reduced and ensures symmetrical cooling.
  • the contact pressure of the strand to the centering rollers can be measured and a signal derived therefrom can be delivered to a control device.
  • a targeted change in the cooling can be carried out locally, for example on a specific strand side, so that a centric strand run is achieved virtually on the thermal path.
  • the continuous casting plant according to the invention makes it possible to cast strands of various sizes without impairing the availability of the plant, since the respective change of the guide rollers and / or the spraying organs or a manual, new positioning of the same is superfluous.
  • the centric strand guidance guarantees high production quality in all strand formats and the changeover times are considerably shortened.
  • a continuous casting plant comprises a mold 1, into which the liquid metal, in particular steel, is filled and continuously removed from below this water-cooled mold 1 with the formation of a shell as cast strand 2.
  • This casting strand is passed through a further cooling device, a so-called secondary cooling, and thereby further cooled.
  • support rollers and spray elements 4 can be installed on the mold outlet as so-called foot roller stands or support segments. These are format-dependent and are replaced with the casting mold each time with the mold.
  • the cooling device comprises a plurality of spray modules 3 arranged one behind the other, in which the guided along a guideway Giessstrang 2 with coolants, usually with water or a water-air mixture is applied.
  • each cooling module 3 is equipped with a multiplicity of spray nozzles 5 designed as spray elements, which are preferably mounted in water-conducting spray mats 7.
  • the spray mats 7 are controlled via an adjusting member 6 substantially concentric to the cast strand axis adjustable.
  • sliding arms 6a are advantageously provided for the spray mats 7 at the inner or outer radius of the strand, or corresponding pivot arms 6b for lateral spray mats 7.
  • a drive 6c connected to the sliding arms 6a or the swivel arms 6b is provided for this adjusting element 6.
  • the strand without spray cooling, d h. be essentially cooled only by means of water-cooled rollers. It is all the more important in this case that the strand remains constantly in contact with all the guide rollers.
  • the casting strand 2 passes through a plurality of successively arranged centering modules 10, each of which has a fixed, the target course of the guideway defining roller 11 for a strand side 2a and other guide rollers for the other strand sides.
  • these further guide rollers 12, 13, 14 are arranged adjustable in a direction substantially perpendicular to the corresponding casting strand surfaces 2b, 2c, 2d independently of the casting strand cross-sectional shape (square, rectangle, round, double-T, etc.), as will be described below.
  • the respective centering module 10 has a stationary frame 20.
  • One of the other guide rollers, the upper guide roller 12, is held by a bracket 20 pivotally mounted, bow-shaped holder 22 worn, such that it can be adjusted during its pivoting relative to the fixed mounted roller 11 and thereby pressed onto the strand side 2b.
  • the pivoting of the holder 22 is preferably accomplished by means of an apparent from Fig. 2 hydraulic cylinder 25 via a rotatably connected to a pivot shaft 21 lever 26. When adjusting the hydraulic cylinder 25 and the lever 26, the pivot shaft 21 and with it also the bow-shaped holder 22 is pivoted accordingly.
  • the two other lateral guide rollers 13, 14 are each supported by a respective fixed frame axis 31, 32 pivotable, sleeve-shaped part 33, 34, via two associated with the respective part flange 33a, 34a, in which the rollers are mounted ,
  • the two sleeve-shaped parts 33, 34 are rotatably connected to each other via intermeshing tooth segments 35, 36.
  • the part 34 is actuated or pivoted by a further hydraulic cylinder 40, wherein its pivoting on the tooth segments 35, 36 is also transmitted to the other part 33, so that the two guide rollers 13, 14 via the pivotable flange 33a, 34a exclusively symmetrical to each other, ie adjusted concentrically to the desired axis of the strand guide path and can be pressed according to uniformly on the two strand side surfaces 2c, 2d.
  • the current contact pressure can be measured in the casting operation and at a pressure rise due to a thermally induced deformation of the casting strand a signal to a control device are issued, via which a targeted change in the cooling initiated and locally, for example on certain strand side, can be performed so that a centric strand run is achieved quasi on the thermal path.
  • a control or regulation of the position and / or the contact force of the guide rollers 12, 13, 14 may be provided on the casting strand (2).
  • this position and / or the contact force of the guide rollers can be set by comparing the setpoints with actual values.
  • control cylinder Under the mentioned regenerative circuit of the control cylinder is meant a circuit in which the two cylinder pressure chamber are connected via line and the active pressure force results from the rod surface and the oil pressure. Only when the strand wants to escape from the desired position increases the pressure on the piston side and the cylinder is up to a predetermined max. Force blocked.
  • the actuators preferably hydraulic cylinders 25, 40 and the control device with advantage in a water-cooled, sealed box 41 above the guide rollers housed and protected by the heat radiation and the corrosive environment.
  • the continuous casting plant according to the invention makes it possible to cast strands of various sizes without impairing the availability of the plant, since the respective change of the guide rolls or new positioning thereof is superfluous. This ensures high production quality in all strand formats.
  • the complete centering modules can be quickly installed and removed in the cooling chamber by means of special manipulators positioned outside the cooling chamber.
  • each module at the junction in the cooling chamber have a special connector unit by means of which all media and signals can be automatically connected.
  • spray nozzles according to the invention could also be provided in a special system, which are contained in a plurality of spray modules (3) arranged one behind the other and can be controlled substantially concentrically to the cast strand axis, during which the guide rollers would be arranged in the conventional sense.

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

Abstract

The casting plant for long steel products, comprises ingot mold (1), from which a cast strand (2) is continuously poured off that forms along a guide way by sequentially arranged guide rollers and is led in a cooling chamber with spraying organs (4) in quasi-manner, and a hydraulic cylinder and/or an actuator on the cast strand. The guide rollers and/or the spraying organs are contained in sequentially arranged centering modules (10) and/or spraying modules (3) and are adjustably driven for defined axis of the cast strand in concentric manner. The casting plant for long steel products, comprises ingot mold (1), from which a cast strand (2) is continuously poured off that forms along a guide way by sequentially arranged guide rollers and is led in a cooling chamber with spraying organs (4) in quasi-manner, and a hydraulic cylinder and/or an actuator on the cast strand. The guide rollers and/or the spraying organs are contained in sequentially arranged centering modules (10) and/or spraying modules (3) and are adjustably driven for defined axis of the cast strand in concentric manner. The respective centering module has a firmly mounted roller defined the set cycle of the guide way for a strand side and further guide rollers for the other strand side. The guide rollers are adjustable by operating bodies in vertical direction to the corresponding strand sides up to the constant contact with the cast strand and concentrically to the defined axis of the cast strand. The contact pressing force of the respective roller is adjustable on the cast strand. The adjustment of the spraying organs is coupled with the adjustment of the guide rollers. One of the further guide rollers of the respective centering module is adjusted relative to the firmly mounted roller and the other remaining guide rollers are concentrically adjustable to the defined axis. The upper guide roller of the centering module adjustable relative to the mounted roller is carried by a bow-shaped holder of the operating bodies lockably held at a frame of the centering module. The hydraulic cylinder and/or the actuator are present on the cast strand for pivoting the holder and/or for pressing the guide roller. The remaining edgewise guide rollers are carried by a hollow-shaped part of the operating bodies pivotable around a fixed frame axis. The hollow-shaped parts are rotatably connected together over an interlocking tooth segment and one of the parts is operated by a further hydraulic cylinder, for the purpose of symmetrical locking of the parts and/or for concentric pressing of the guide roller in reference to the cast strand running in its defined position. A control or a regulator provides pressing force of the guide rollers at the cast strand. The respective hydraulic cylinders of the operating bodies are fixable by a prefixed position of the guide rollers up to a very high adjustable defining force. The cylinders operatively connected with a control device are jointly arranged with the control device in a water-cooled box above the guide rollers. The centering modules are installable and/or upgradeable with a manipulator positioned outside of the respective cooling chamber. The centering module has connector units defined at the connection point for casting plant. The cooling- and controlling media and measuring- and controlling signal are automatically connected by the connector units during module installation. The spraying modules are arranged as spraying nozzles or similarly formed spraying organs with the spraying slats. The spraying slats and the spraying organs are adjustable in vertical direction to the corresponding strand sides by the operating bodies. An independent claim is included for a process for strand casting of long steel products.

Description

Die Erfindung betrifft eine Stranggiessanlage, insbesondere für Stahl-Langprodukte, gemäss dem Oberbegriff des Anspruches 1 sowie ein Verfahren zum Stranggiessen nach dem Oberbegriff des Anspruches 13.The invention relates to a continuous casting plant, in particular for steel long products, according to the preamble of claim 1 and a process for continuous casting according to the preamble of claim 13.

Beim Stranggiessen wird bekanntlich das flüssige Metall, z. B. der flüssige Stahl, in eine gekühlte Kokille eingefüllt und unten aus dieser Kokille unter Schalenbildung als Giessstrang kontinuierlich weggeführt. Dieser Giessstrang wird durch eine weitere Kühleinrichtung, eine sogenannte Sekundärkühlung, entlang einer durch hintereinander angeordnete Führungsrollen gebildeten Führungsbahn geführt und dabei durch Beaufschlagen mit Kühlmitteln (Aufspritzen von Wasser, Wasser-Luftgemisch) sowie Kontakt mit den Führungsrollen als auch durch eine Abstrahlung der Wärme weiter abgekühlt.When continuous casting is known, the liquid metal, eg. As the liquid steel, filled in a cooled mold and continuously led away from this mold with shell formation as Giessstrang continuously. This Giessstrang is by a further cooling device, a so-called secondary cooling, along a successively arranged guide rollers guided guideway and thereby further cooled by applying with coolants (spraying of water, water-air mixture) and contact with the guide rollers and by a radiation of heat.

Aus Qualitätsgründen ist es wichtig, dass der Giessstrang in Bezug auf seinen Querschnitt symmetrisch gekühlt wird. Dazu müssen einerseits die Kühldüsen genau positioniert und ausgerichtet sein sowie gleiche Sprühcharakteristika aufweisen, anderseits ist aber auch eine exakte Führung des Giessstranges entlang seiner Führungsbahn wichtig. Sobald sich im gegossenen Strang aus irgendeinem Grund ein unsymmetrisches Temperaturfeld einstellt, tendiert der Strang dazu, infolge von thermischer Verformung aus der Führungsbahn z.B. seitlich auszuweichen. Diese Verlagerung führt sofort zur ungleichmässigen Kühlwassermittel-Beaufschlagung und somit zur weiteren Verlagerung des Stranges aus seiner Sollposition. Das Problem wird besonders kritisch, wenn kleinformatige Stränge (Knüppel, ca. 100-160 mm Vierkant) unter Einsatz von hochintensiver Spritzwasserkühlung, sogenannter harter Kühlung, gegossen werden. Des Weiteren kann es beim Giessen von Knüppel-Strängen zum Abheben des Stranges von seiner bogenförmigen Führungsbahn kommen, wenn im Kokillenbereich erhöhte Reibkräfte auftreten, und dabei der relativ biegeweiche Strang quasi gestreckt wird.For quality reasons, it is important that the cast strand is cooled symmetrically with respect to its cross section. For this purpose, on the one hand the cooling nozzles must be accurately positioned and aligned and have the same spray characteristics, but on the other hand, an exact guidance of the casting strand along its guideway is important. As soon as an unbalanced temperature field is established in the cast strand for some reason, the strand tends to be deformed due to thermal deformation from the guideway, e.g. sideways dodge. This shift leads immediately to uneven coolant-impingement and thus further displacement of the strand from its desired position. The problem is particularly critical when small-sized strands (billets, about 100-160 mm square) are poured using high-intensity spray water cooling, so-called hard cooling. Furthermore, when cast billet strands for lifting the strand come from its arcuate guideway when increased frictional forces occur in the mold area, while the relatively flexible strand is quasi stretched.

Zur Führung des Stranges durch die Kühleinrichtung werden Führungsrollen verwendet, welche fix oder nachgiebig (über Federpakete, Pressluftbälge etc.) in einem vorgegebenen Mindestabstand zum Strang montiert sind, wobei die nachgiebige Ausführung praktisch nur an der Strangoberseite verwendet wird.To guide the strand through the cooling device guide rollers are used, which are fixed or compliant (via spring assemblies, compressed air bellows, etc.) are mounted at a predetermined minimum distance from the strand, the compliant design is practically only used on the strand top.

Es ist bei diesen Lösungen von Nachteil, dass infolge der stark korrosiven und feuchten Umgebung der Kühlkammer die meisten Rollen nach kurzer Dauer festsitzen, da sie nur sporadisch vom Strang berührt und von diesem gedreht werden, weshalb an den Lagerstellen rasch Korrosionsprodukte und Kalkablagerungen sich absetzen können. Festsitzende Rollen werden einerseits infolge der Wärmestrahlung des Stranges thermisch überlastet und anderseits beschädigen sie vielfach die Strangoberflächen mit Riefen und Längskratzern, welche zum Produktausschuss führen. Ausserdem müssen - wenn in der gleichen Stranggiessanlage Stränge mit verschieden grossen Querschnitts-Formaten gegossen werden - jeweils entweder komplett neue Führungselemente eingebaut oder Führungsrollen in eine neue Position versetzt werden. Beides bedeutet Zeitaufwand und beeinträchtigt die Verfügbarkeit der Giessanlage. In der Praxis werden deshalb die Führungsrollen vielfach auf das grösste Format eingestellt, und die kleineren Formate dadurch nur in weiten Grenzen geführt.It is disadvantageous in these solutions that due to the highly corrosive and humid environment of the cooling chamber, most of the roles stuck after a short time, as they are only sporadically touched by the strand and be rotated by this, which is why at the bearings quickly corrosion products and lime deposits can settle. Fixed rollers are on the one hand thermally overloaded as a result of the heat radiation of the strand and on the other hand they often damage the strand surfaces with grooves and longitudinal scratches, which lead to product rejects. In addition - if in the same continuous casting line strands are cast with different sizes cross-sectional formats - each have either completely new guide elements installed or guide rollers are moved to a new position. Both means time expenditure and affects the availability of the casting plant. In practice, therefore, the leadership roles are often set to the largest format, and thereby led the smaller formats only within wide limits.

Beim Auftreten von Giessstörungen, z.B. Strangdurchbrüchen, erschweren fix positionierte Führungsrollen und Sprühlatten das Entfernen des Durchbruchstranges, und die Wiederherstellung der Betriebsbereitschaft ist zeitaufwendig.When casting disorders occur, e.g. Strand breakthroughs, fixedly positioned guide rollers and spray mats make it difficult to remove the breakthrough line, and restoring readiness for operation is time consuming.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Stranggiessanlage der eingangs genannten Art zu schaffen sowie ein Verfahren zum Stranggiessen insbesondere von Stahl vorzuschlagen, mit denen die Qualität des gegossenen Stranges durch eine präzise, in Bezug auf den Strangquerschnitt symmetrisch verteilte Kühlung erheblich verbessert werden kann. Ausserdem sollen die Nebenzeiten bei Umstellung der Giessanlage auf ein anderes Giessformat und beim Unterhalt reduziert werden.The present invention has for its object to provide a continuous casting of the type mentioned above and to propose a method for continuous casting in particular steel, with which the quality of the cast strand can be significantly improved by a precise, with respect to the strand cross-section symmetrically distributed cooling. In addition, the non-productive time should be reduced when changing the casting plant to another casting format and maintenance.

Diese Aufgabe wird erfindungsgemäss durch eine Stranggiessanlage mit den Merkmalen des Anspruches 1 sowie durch ein Verfahren nach Anspruch 13 gelöst.This object is achieved by a continuous casting with the features of claim 1 and by a method according to claim 13.

Weitere bevorzugte Ausgestaltungen der erfindungsgemässen Stranggiessanlage sowie des erfindungsgemässen Verfahrens bilden den Gegenstand der abhängigen Ansprüche.Further preferred embodiments of the continuous casting plant according to the invention and of the process according to the invention form the subject matter of the dependent claims.

Bei der erfindungsgemässen Stranggiessanlage mit mehreren hintereinander angeordneten Zentriermodulen, von denen jedes eine fix montierte, den Sollverlauf der Führungsbahn definierende Rolle für eine Strangseite sowie weitere Führungsrollen für die anderen Strangseiten aufweist, wobei die weiteren Führungsrollen in im wesentlichen senkrechter Richtung zu den entsprechenden Giessstrangflächen verstellbar sind und der Anpressdruck der jeweiligen Rolle auf den Giessstrang einstellbar ist, wird sichergestellt, dass die Führungsrollen durch das Klemmen des Stranges ständig mitlaufen und der Giessstrang in seiner Sollposition in der Führungsbahn gehalten wird. Dadurch wird einerseits die Gefahr einer thermischen Überlastung der Rollen und einer Beschädigung der Strangoberfläche erheblich reduziert und eine symmetrische Kühlung gewährleistet.In the inventive continuous casting with several consecutively arranged centering modules, each of which has a fixed, defining the desired course of the guideway role for a strand side and other leadership roles for the other strand sides, the other guide rollers are adjustable in a direction substantially perpendicular to the corresponding Giessstrangflächen and the contact pressure of the respective roller is adjustable to the casting strand, it is ensured that the guide rollers constantly run through the clamping of the strand and the casting strand is held in its desired position in the guideway. As a result, on the one hand the risk of thermal overloading of the rollers and damage to the strand surface is significantly reduced and ensures symmetrical cooling.

Zudem kann der Anpressdruck des Stranges an die Zentrierrollen gemessen und ein daraus abgeleitetes Signal an eine Steuereinrichtung abgegeben werden. Beispielsweise bei einem Kraftanstieg an die seitlichen Rollen infolge einer thermisch bedingten Verformung des Giessstranges kann eine gezielte Veränderung der Kühlung örtlich, zum Beispiel an bestimmter Strangseite, durchgeführt werden, so dass ein zentrischer Stranglauf quasi auf dem thermischen Wege erreicht wird.In addition, the contact pressure of the strand to the centering rollers can be measured and a signal derived therefrom can be delivered to a control device. For example, in the case of an increase in force on the lateral rollers as a result of a thermally induced deformation of the cast strand, a targeted change in the cooling can be carried out locally, for example on a specific strand side, so that a centric strand run is achieved virtually on the thermal path.

Ebenso können aus dem Anstieg der Stranganpresskraft des entlang seiner bogenförmigen Führungsbahn bewegten Knüppelstranges an die oberen Zentrierrollen auf die Strangausziehkräfte und somit auf die Reibkräfte im Kokillenbereich Rückschlüsse gezogen werden, was neu Möglichkeiten für die Überwachung des Giessprozesses, insbesondere der Kokillenreibung, eröffnet.Likewise, conclusions can be drawn from the increase in the strand pressing force of the billet strand moved along its arcuate guide track to the upper centering rolls on the strand withdrawal forces and thus on the frictional forces in the mold region, which opens up new possibilities for monitoring the casting process, in particular the mold friction.

Die erfindungsgemässe Stranggiessanlage ermöglicht Giessen von Strängen mit verschieden grossen Formaten ohne Beeinträchtigung der Verfügbarkeit der Anlage, da sich der jeweilige Wechsel der Führungsrollen und/oder der Sprühorgane bzw. eine manuelle, neue Positionierung derselben erübrigt. Dabei wird durch die zentrische Strangführung bei allen Strangformaten hohe Produktionsqualität gewährleistet und die Umrüstzeiten werden wesentlich verkürzt.The continuous casting plant according to the invention makes it possible to cast strands of various sizes without impairing the availability of the plant, since the respective change of the guide rollers and / or the spraying organs or a manual, new positioning of the same is superfluous. The centric strand guidance guarantees high production quality in all strand formats and the changeover times are considerably shortened.

Die Erfindung wird nachfolgend anhand der Zeichnung näher erläutert.
Es zeigen:

Fig. 1
schematisch einen Teil (Kokille mit der anschliessender Kühlkammer) einer erfindungsgemässen Stranggiessanlage in Seitenansicht;
Fig. 2
ein Zentriermodul als Teil der Stranggiessanlage nach Fig. 1 in perspektivischer Darstellung; und
Fig. 3
das Zentriermodul nach Fig. 2 mit einem Schutzkasten für eine Steuereinrichtung.
The invention will be explained in more detail with reference to the drawing.
Show it:
Fig. 1
schematically a part (mold with the subsequent cooling chamber) of a continuous casting plant according to the invention in side view;
Fig. 2
a centering module as part of the continuous casting plant of Figure 1 in a perspective view. and
Fig. 3
the centering module of FIG. 2 with a protective box for a control device.

Gemäss Fig.1 umfasst eine Stranggiessanlage eine Kokille 1, in welche das flüssige Metall, insbesondere Stahl, eingefüllt und unten aus dieser wassergekühlten Kokille 1 unter Schalenbildung als Giessstrang 2 kontinuierlich weggeführt wird. Dieser Giessstrang wird durch eine weitere Kühleinrichtung, eine sogenannte Sekundärkühlung, geführt und dabei weiter abgekühlt. Am Kokillenausgang können je nach Bedarf Stützrollen und Sprühorgane 4 als sogenannte Fussrollengerüste oder Stützsegmente installiert sein. Diese sind formatabhängig und werden jeweils beim Giessformatwechsel mit der Kokille ausgewechselt.According to FIG. 1, a continuous casting plant comprises a mold 1, into which the liquid metal, in particular steel, is filled and continuously removed from below this water-cooled mold 1 with the formation of a shell as cast strand 2. This casting strand is passed through a further cooling device, a so-called secondary cooling, and thereby further cooled. Depending on requirements, support rollers and spray elements 4 can be installed on the mold outlet as so-called foot roller stands or support segments. These are format-dependent and are replaced with the casting mold each time with the mold.

Die Kühleinrichtung umfasst mehrere hintereinander angeordnete Sprühmodule 3, in welchen der entlang einer Führungsbahn geführte Giessstrang 2 mit Kühlmitteln, in der Regel mit Wasser oder einem Wasser-Luftgemisch beaufschlagt wird. Zu diesem Zweck ist jedes Kühlmodul 3 mit einer Vielzahl von als Sprühorgane ausgebildeten Sprühdüsen 5 ausgestattet, welche vorzugsweise in wasserführenden Sprühlatten 7 montiert sind. Die Sprühlatten 7 sind über ein Verstellorgan 6 im wesentlichen konzentrisch zur Giessstrangachse gesteuert einstellbar. Als Verstellorgan 6 sind vorteilhaft Schiebearme 6a für die Sprühlatten 7 an dem Innen bzw. Aussenradius des Stranges, bzw. entsprechende Schwenkarme 6b für seitliche Sprühlatten 7 vorgesehen. Ausserdem ist für dieses Verstellorgan 6 ein mit den Schiebearmen 6a bzw. den Schwenkarme 6b verbundener Antrieb 6c vorgesehen.The cooling device comprises a plurality of spray modules 3 arranged one behind the other, in which the guided along a guideway Giessstrang 2 with coolants, usually with water or a water-air mixture is applied. For this purpose, each cooling module 3 is equipped with a multiplicity of spray nozzles 5 designed as spray elements, which are preferably mounted in water-conducting spray mats 7. The spray mats 7 are controlled via an adjusting member 6 substantially concentric to the cast strand axis adjustable. As an adjusting member 6 sliding arms 6a are advantageously provided for the spray mats 7 at the inner or outer radius of the strand, or corresponding pivot arms 6b for lateral spray mats 7. In addition, a drive 6c connected to the sliding arms 6a or the swivel arms 6b is provided for this adjusting element 6.

Unter besondern Umständen kann beim sogenannten Trockengiessen der Strang hingegen ohne Sprühkühlung, d h. im wesentlichen nur mittels wassergekühlten Rollen gekühlt werden. Es ist in diesem Fall um so wichtiger, dass der Strang ständig mit allen Führungsrollen im Kontakt bleibt.Under special circumstances, however, in the so-called dry casting, the strand without spray cooling, d h. be essentially cooled only by means of water-cooled rollers. It is all the more important in this case that the strand remains constantly in contact with all the guide rollers.

Der Giessstrang 2 läuft mehrere hintereinander angeordnete Zentriermodule 10 durch, von denen jedes eine fix montierte, den Sollverlauf der Führungsbahn definierende Rolle 11 für eine Strangseite 2a sowie weitere Führungsrollen für die anderen Strangseiten aufweist. Diese sind insbesondere aus Fig. 2 und 3 ersichtlich ). Im Gegensatz zur Rolle 11 sind diese weiteren Führungsrollen 12, 13, 14 in im wesentlichen senkrechter Richtung zu den entsprechenden Giessstrangflächen 2b, 2c, 2d unabhängig vom Giessstrang-Querschnittsform (Quadrat, Rechteck, Rund, Doppel-T, etc.) verstellbar angeordnet, wie nun im folgenden beschrieben wird.The casting strand 2 passes through a plurality of successively arranged centering modules 10, each of which has a fixed, the target course of the guideway defining roller 11 for a strand side 2a and other guide rollers for the other strand sides. These can be seen in particular from FIGS. 2 and 3). In contrast to the roller 11, these further guide rollers 12, 13, 14 are arranged adjustable in a direction substantially perpendicular to the corresponding casting strand surfaces 2b, 2c, 2d independently of the casting strand cross-sectional shape (square, rectangle, round, double-T, etc.), as will be described below.

Das jeweilige Zentriermodul 10 weist einen ortsfesten Rahmen 20 auf. Eine der weiteren Führungsrollen, die obere Führungsrolle 12, wird von einem am Rahmen 20 verschwenkbar gehaltenen, bügelförmigen Halter 22 getragen, derart, dass sie bei seiner Verschwenkung relativ zu der fix montierten Rolle 11 verstellt und dabei auf die Strangseite 2b angepresst werden kann. Die Verschwenkung des Halters 22 wird vorzugsweise mittels eines aus Fig. 2 ersichtlichen Hydraulikzylinders 25 über einen drehfest mit einer Schwenkwelle 21 verbundenen Hebel 26 bewerkstelligt. Bei der Verstellung des Hydraulikzylinders 25 und des Hebels 26 wird die Schwenkwelle 21 und mit ihr auch der bügelförmige Halter 22 entsprechend verschwenkt.The respective centering module 10 has a stationary frame 20. One of the other guide rollers, the upper guide roller 12, is held by a bracket 20 pivotally mounted, bow-shaped holder 22 worn, such that it can be adjusted during its pivoting relative to the fixed mounted roller 11 and thereby pressed onto the strand side 2b. The pivoting of the holder 22 is preferably accomplished by means of an apparent from Fig. 2 hydraulic cylinder 25 via a rotatably connected to a pivot shaft 21 lever 26. When adjusting the hydraulic cylinder 25 and the lever 26, the pivot shaft 21 and with it also the bow-shaped holder 22 is pivoted accordingly.

Die beiden übrigen seitlichen Führungsrollen 13, 14 werden von je einem um je eine rahmenfeste Achse 31, 32 verschwenkbaren, hülsenförmigen Teil 33, 34 getragen, und zwar über je zwei mit dem jeweiligen Teil verbundene Flanschteile 33a, 34a, in denen die Rollen gelagert sind. Die beiden hülsenförmigen Teile 33, 34 sind über ineinandergreifende Zahnsegmente 35, 36 miteinander drehverbunden. Einer der beiden Teile, gemäss Fig. 2 der Teil 34, wird von einem weiteren Hydraulikzylinder 40 betätigt bzw. verschwenkt, wobei seine Verschwenkung über die Zahnsegmente 35, 36 auch auf den anderen Teil 33 übertragen wird, so dass die beiden Führungsrollen 13, 14 über die verschwenkbaren Flanschteile 33a, 34a ausschliesslich symmetrisch zueinander, d.h konzentrisch zur Sollachse der Strangführungsbahn verstellt und entsprechend gleichmässig auf die beiden Strang-Seitenflächen 2c, 2d angepresst werden können.The two other lateral guide rollers 13, 14 are each supported by a respective fixed frame axis 31, 32 pivotable, sleeve-shaped part 33, 34, via two associated with the respective part flange 33a, 34a, in which the rollers are mounted , The two sleeve-shaped parts 33, 34 are rotatably connected to each other via intermeshing tooth segments 35, 36. One of the two parts, as shown in FIG. 2, the part 34 is actuated or pivoted by a further hydraulic cylinder 40, wherein its pivoting on the tooth segments 35, 36 is also transmitted to the other part 33, so that the two guide rollers 13, 14 via the pivotable flange 33a, 34a exclusively symmetrical to each other, ie adjusted concentrically to the desired axis of the strand guide path and can be pressed according to uniformly on the two strand side surfaces 2c, 2d.

Über die beiden Hydraulikzylinder 25, 40 wird der Anpressdruck der Führungsrollen 12, 13, 14 gesteuert eingestellt, und es wird sichergestellt, dass die Führungsrollen ständig mitlaufen. Dadurch wird die Gefahr einer thermischen Überlastung der Rollen und einer Beschädigung der Strangoberfläche erheblich reduziert.About the two hydraulic cylinders 25, 40, the contact pressure of the guide rollers 12, 13, 14 is controlled, and it is ensured that the guide rollers constantly run. As a result, the risk of thermal overload of the rollers and damage to the strand surface is significantly reduced.

Zudem kann im Giessbetrieb der aktuelle Anpressdruck gemessen und bei einem Druckanstieg infolge einer thermisch bedingten Verformung des Giessstranges ein Signal an eine Steuereinrichtung abgegeben werden, über welche eine gezielte Veränderung der Kühlung eingeleitet und örtlich, z.B. an bestimmter Strangseite, durchgeführt werden kann, so dass ein zentrischer Stranglauf quasi auf dem thermischen Wege erreicht wird.In addition, the current contact pressure can be measured in the casting operation and at a pressure rise due to a thermally induced deformation of the casting strand a signal to a control device are issued, via which a targeted change in the cooling initiated and locally, for example on certain strand side, can be performed so that a centric strand run is achieved quasi on the thermal path.

Je nach Bedarf kann eine Steuerung oder eine Regelung der Position und/oder der Anpresskraft der Führungsrollen 12, 13, 14 an den Giessstrang (2) vorgesehen sein. Bei einer Regelung kann diese Position und/oder die Anpresskraft der Führungsrollen durch einen Vergleich der Sollwerte mit Istwerten eingestellt werden.Depending on requirements, a control or regulation of the position and / or the contact force of the guide rollers 12, 13, 14 may be provided on the casting strand (2). In a closed-loop control, this position and / or the contact force of the guide rollers can be set by comparing the setpoints with actual values.

Es ist auch möglich, eine vorangestellte Position der Zentrierrollen über eine entsprechende Schaltung der Betätigungsorgane, beispielsweise durch regenerative Schaltung der Hydraulikzylinder, bis zu einer sehr hohen, einstellbaren Ablasskraft zu fixieren. Diese Position kann in vorgegebenen Zeitabständen überprüft und bei Bedarf korrigiert werden. Diese Korrektur kann entweder gesteuert oder sogar in Form einer adaptiven Regelung erfolgen, die sich den lokalen geometrischen Bedürfnissen des Stranges anpassen kann.It is also possible to fix a preceding position of the centering rollers via a corresponding circuit of the actuators, for example by regenerative switching of the hydraulic cylinders, up to a very high, adjustable discharge force. This position can be checked at predetermined intervals and corrected if necessary. This correction can be either controlled or even done in the form of an adaptive control that can accommodate the local geometric needs of the string.

Unter der erwähnten regenerativen Schaltung der Steuerzylinder ist eine Schaltung gemeint bei der die beiden Zylinderdruckammer über Leitung verbunden sind und die aktive Anpresskraft aus der Stangenfläche und dem Oeldruck resultiert. Erst wenn der Strang aus der Solllage ausweichen will steigt der Druck an der Kolbenseite und der Zylinder wird bis zu einer vorgegebener max. Kraft blockiert.Under the mentioned regenerative circuit of the control cylinder is meant a circuit in which the two cylinder pressure chamber are connected via line and the active pressure force results from the rod surface and the oil pressure. Only when the strand wants to escape from the desired position increases the pressure on the piston side and the cylinder is up to a predetermined max. Force blocked.

Wie aus Fig. 3 ersichtlich, werden die Stellorgane, vorzugsweise Hydraulikzylinder 25, 40 sowie die Steuereinrichtung mit Vorteil in einem wassergekühlten, dicht verschlossenen Kasten 41 oberhalb der Führungsrollen untergebracht und von der Wärmestrahlung und der Korrosiven Umgebung geschützt.As can be seen from Fig. 3, the actuators, preferably hydraulic cylinders 25, 40 and the control device with advantage in a water-cooled, sealed box 41 above the guide rollers housed and protected by the heat radiation and the corrosive environment.

Die erfindungsgemässe Stranggiessanlage ermöglicht ein Giessen von Strängen mit verschieden grossen Formaten ohne Beeinträchtigung der Verfügbarkeit der Anlage, da sich der jeweilige Wechsel der Führungsrollen bzw. neue Positionierung derselben erübrigt. Dabei wird bei allen Strangformaten hohe Produktionsqualität gewährleistet.The continuous casting plant according to the invention makes it possible to cast strands of various sizes without impairing the availability of the plant, since the respective change of the guide rolls or new positioning thereof is superfluous. This ensures high production quality in all strand formats.

Es wäre möglich, die mit Sprühdüsen bestückten Sprühlatten mit den Stellmechanismen der Führungsrollen zu koppeln und dadurch eine automatische Verstellung der Kühlorgane bei Formatwechseln zu realisieren, was eine schnelle, ferngesteuerte Umstellung der Giessanlage auf neues Giessformat ermöglichen würde.It would be possible to couple the spray mats equipped with spray nozzles with the adjusting mechanisms of the guide rollers and thereby realize an automatic adjustment of the cooling elements in format changes, which would allow a fast, remote control of the casting plant to new casting format.

Die kompletten Zentriermodule können mittels speziellen, ausserhalb der Kühlkammer positionierten Manipulatoren in die Kühlkammer schnell ein- und ausgebaut werden. Dabei kann jedes Modul an der Anschlussstelle in der Kühlkammer eine spezielle Steckereinheit aufweisen, mit Hilfe derer alle Medien und Signale automatisch angeschlossen werden können.The complete centering modules can be quickly installed and removed in the cooling chamber by means of special manipulators positioned outside the cooling chamber. In this case, each module at the junction in the cooling chamber have a special connector unit by means of which all media and signals can be automatically connected.

Im Prinzip könnten im Rahmen der Erfindung auch bei einer speziellen Anlage nur erfindungsgemässe Sprühorgane vorgesehen sein, welche in mehreren hintereinander angeordneten Sprühmodulen (3) enthalten sind und im wesentlichen konzentrisch zur Giessstrangachse gesteuert verstellbar sind, währenddessen die Führungsrollen im herkömmlichen Sinne angeordnet wären.In principle, within the scope of the invention, only spray nozzles according to the invention could also be provided in a special system, which are contained in a plurality of spray modules (3) arranged one behind the other and can be controlled substantially concentrically to the cast strand axis, during which the guide rollers would be arranged in the conventional sense.

Claims (20)

Stranggiessanlage insbesondere für Stahl-Langprodukte, mit einer Kokille (1), aus welcher ein Giessstrang (2) kontinuierlich abgegossen wird, welcher entlang einer durch hintereinander angeordneten Führungsrollen (11, 12, 13, 14) gebildeten, insbesondere bogenförmigen Führungsbahn und gleichsam in einer Kühlkammer mit Sprühorganen geführt ist, dadurch gekennzeichnet, dass
die Führungsrollen (12, 13, 14) und/oder die Sprühorgane in mehreren hintereinander angeordneten Zentriermodulen (10) bzw. Sprühmodulen (3) enthalten sind und im wesentlichen konzentrisch zur Giessstrang-Sollachse gesteuert verstellbar sind.Continuous casting plant especially for long steel products, with a mold (1) from which a casting strand (2) is poured continuously, which along a guide rollers (11, 12, 13, 14) arranged, in particular arcuate guideway and quasi in a Cooling chamber is guided with spray elements, characterized in that
the guide rollers (12, 13, 14) and / or the spray elements are contained in a plurality of centering modules (10) or spray modules (3) arranged one behind the other and can be controlled in a controlled manner substantially concentric with the casting strand target axis. Stranggiessanlage nach Anspruch 1, dadurch gekennzeichnet, dass dem jeweiligen Zentriermodul (10) wenigstens eine fest montierte, den Sollverlauf der Führungsbahn definierende Rolle (11) für eine Strangseite (2a) sowie weitere Führungsrollen (12, 13, 14) für die anderen Strangseiten (2b, 2c, 2d) aufweist, wobei diese weiteren Führungsrollen (12, 13, 14) mittels Betätigungsorganen in annähernd senkrechter Richtung zu den entsprechenden Strangseiten (2b, 2c, 2d) bis zum ständigen Kontakt mit dem Giessstrang (2) und konzentrisch zur Sollachse des Giesstranges verstellbar sind und die Anpresskraft der jeweiligen Rolle auf den Giessstrang (2) einstellbar ist.Continuous casting installation according to claim 1, characterized in that the respective centering module (10) has at least one fixed roller (11) defining the desired course of the guide track for one strand side (2a) and further guide rollers (12, 13, 14) for the other strand sides ( 2b, 2c, 2d), said further guide rollers (12, 13, 14) by means of actuators in approximately perpendicular direction to the respective strand sides (2b, 2c, 2d) to constant contact with the casting strand (2) and concentric with the desired axis of Gießstranges are adjustable and the contact pressure of the respective role on the casting strand (2) is adjustable. Stranggiessanlage nach Anspruch 1, dadurch gekennzeichnet, dass die Verstellung der Sprühorgane mit der Verstellung der Führungsrollen (12, 13, 14) gekoppelt ist.Continuous casting plant according to claim 1, characterized in that the adjustment of the spray elements with the adjustment of the guide rollers (12, 13, 14) is coupled. Stranggiessanlage nach Anspruch 2, dadurch gekennzeichnet, dass eine der weiteren Führungsrollen (12, 13, 14) des jeweiligen Zentriermoduls (10) relativ zu der fest montierten Rolle (11) und die beiden übrigen Führungsrollen (13, 14) konzentrisch zur Stranggiess-Sollachse verstellbar sind.Continuous casting plant according to claim 2, characterized in that one of the further guide rollers (12, 13, 14) of the respective centering module (10) relative to the fixedly mounted roller (11) and the two remaining guide rollers (13, 14) concentric with the continuous casting target axis are adjustable. Stranggiessanlage nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die relativ zu der fest montierten Rolle (11) verstellbare obere Führungsrolle (12) des jeweiligen Zentriermoduls (10) von einem bügelförmigen, an einem Rahmen (20) des Zentriermoduls (10) verschwenkbar gehaltenen Halter (22) des Betätigungsorgans getragen ist, wobei zur Verschwenkung des Halters (22) bzw. zum Anpressen der Führungsrolle (12) auf den Giessstrang (2) ein Hydraulikzylinder (25) bzw. ein Aktuator (beispielsweise ein elektromechanischer Zylinder etc.) vorhanden ist.Continuous casting installation according to one of Claims 1 to 4, characterized in that the upper guide roller (12) of the respective centering module (10) which can be adjusted relative to the fixed roller (11) consists of a bow-shaped frame (20) of the centering module (10). pivotally held holder (22) of the actuating member is carried, wherein for pivoting the holder (22) or for pressing the guide roller (12) on the casting strand (2) a hydraulic cylinder (25) or an actuator (for example, an electromechanical cylinder, etc. ) is available. Stranggiessanlage nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die beiden übrigen seitlichen Führungsrollen (13, 14) von je einem um je eine rahmenfeste Achse (31, 32) verschwenkbaren, hülsenförmigen Teil (33, 34) des Betätigungsorgans getragen sind, wobei die beiden hülsenförmigen Teile (33, 34) über ineinandergreifende Zahnsegmente (35, 36) miteinander drehverbunden sind und einer der beiden Teile (33, 34) von einem weiteren Hydraulikzylinder (40) betätigbar ist, zwecks symmetrischer Verschwenkung der Teile (33, 34) bzw. zum konzentrischen Anpressen der Führungsrollen (13, 14) in Bezug auf auf den in seiner Sollposition laufenden Giessstrang (2).Continuous casting installation according to one of Claims 1 to 5, characterized in that the two other lateral guide rollers (13, 14) are each supported by a sleeve-shaped part (33, 34) of the actuating element that can pivot about a respective frame-fixed axis (31, 32). wherein the two sleeve-shaped parts (33, 34) are rotatably connected to one another via intermeshing toothed segments (35, 36) and one of the two parts (33, 34) can be actuated by a further hydraulic cylinder (40) for symmetrical pivoting of the parts (33, 34 ) or for the concentric pressing of the guide rollers (13, 14) with respect to the running in its desired position casting strand (2). Stranggiessanlage nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass eine Steuerung oder eine Regelung der Position und/oder der Anpresskraft der Führungsrollen (12, 13, 14) an den Giessstrang (2) vorgesehen ist.Continuous casting plant according to claim 5 or 6, characterized in that a control or regulation of the position and / or the contact force of the guide rollers (12, 13, 14) to the casting strand (2) is provided. Stranggiessanlage nach Anspruch 5, 6 oder 7, dadurch gekennzeichnet, dass der jeweilige Hydraulikzylinder (25, 40) des Betätigungsorgans mittels einer Steuerschaltung, vorzugsweise mittels einer regenerativen Schaltung in einer vorangestellten Position der Führungsrollen (12, 13, 14) bis zu einer sehr hohen einstellbaren Grenzkraft fixierbar ist.Continuous casting plant according to claim 5, 6 or 7, characterized in that the respective hydraulic cylinder (25, 40) of the actuating member by means of a control circuit, preferably by means of a regenerative circuit in a leading position of the guide rollers (12, 13, 14) up to a very high adjustable limit force can be fixed. Stranggiessanlage nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, dass die mit einer Steuerungseinrichtung wirkverbundenen Hydraulikzylinder (25, 40) zusammen mit der Steuerungseinrichtung in einem wassergekühlten Kasten (41) oberhalb der Führungsrollen (11, 12, 13, 14) angeordnet sind.Continuous casting plant according to one of Claims 5 to 8, characterized in that the hydraulic cylinders (25, 40) operatively connected to a control device are arranged together with the control device in a water-cooled box (41) above the guide rollers (11, 12, 13, 14). Stranggiessanlage nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Zentriermodule (10) mit Hilfe eines ausserhalb der jeweiligen Kühlkammer positionierten Manipulators ein- bzw. ausbaubar sind.Continuous casting installation according to one of Claims 1 to 9, characterized in that the centering modules (10) can be installed or removed by means of a manipulator positioned outside the respective cooling chamber. Stranggiessanlage nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die Zentriermodule (10) an den Anschlussstellen zur Giessanlage definierte Steckereinheiten aufweisen, mit Hilfe derer sowohl Kühl- und Steuermedien als auch Mess- und Steuersignale beim Moduleinbau automatisch angeschlossen werden.Continuous casting installation according to one of Claims 1 to 10, characterized in that the centering modules (10) have plug units defined at the connection points to the casting installation, with the aid of which both cooling and control media and measuring and control signals are automatically connected during module installation. Stranggiessanlage nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass den Sprühmodulen (3) Sprühlatten (7) mit den als Sprühdüsen (5)oder ähnlichem ausgebildeten Sprühorganen zugeordnet sind, wobei diese Sprühlatten (7) und mit ihnen die Sprühorgane in annähernd senkrechter Richtung zu den entsprechenden Strangseiten (2b, 2c, 2d) mittels Betätigungsorganen verstellbar sind.Continuous casting plant according to one of claims 1 to 11, characterized in that the spray modules (3) assigned to spray mats (7) with the spray nozzles as (5) or the like spray members are, these spray mats (7) and with them the spray elements in approximately perpendicular direction to the respective strand sides (2b, 2c, 2d) are adjustable by means of actuators. Verfahren zum Stranggiessen insbesondere von Stahl-Langprodukten, bei dem der flüssige Stahl in eine Kokille (1) eingefüllt und unten aus dieser Kokille (1) unter Schalenbildung als Giessstrang (2) kontinuierlich abgezogen wird, wobei dieser Giessstrang (2) entlang einer durch hintereinander angeordnete Führungsrollen (11, 12, 13, 14) gebildeten Führungsbahn geführt und dabei durch Beaufschlagung mit Kühlmitteln weiter abgekühlt wird, dadurch gekennzeichnet, dass
die Anpresskraft von mindestens einem Teil der Führungsrollen (11, 12, 13, 14) auf den Giessstrang (2) gemessen und ein Signal an eine Steuerungseinrichtung abgegeben wird.Process for continuous casting, in particular of steel long products, in which the liquid steel is introduced into a mold (1) and continuously withdrawn from below this mold (1) with formation of a shell as cast strand (2), this casting strand (2) being passed through one behind the other arranged guide rollers (11, 12, 13, 14) guided guideway and thereby cooled further by applying coolant, characterized in that
the contact force of at least part of the guide rollers (11, 12, 13, 14) measured on the casting strand (2) and a signal is output to a control device. Verfahren nach Anspruch 13, dadurch gekennzeichnet, dass die Anpresskraft des Stranges an die seitlichen Führungsrollen (13, 14) jeweils gemessen und daraus abgeleitete Signale an eine Steuerungseinrichtung abgegeben wird, über welche bei einer thermischen Verformung des Giessstranges (2) eine gezielte Veränderung der durch die Kühleinrichtung (3) erfolgten Kühlung eingeleitet und örtlich durchgeführt wird.A method according to claim 13, characterized in that the contact force of the strand to the lateral guide rollers (13, 14) respectively measured and derived signals is delivered to a control device, via which in a thermal deformation of the casting strand (2) a targeted change of the cooling device (3) was initiated cooling and carried out locally. Verfahren nach Anspruch 13 oder 14, dadurch gekennzeichnet, dass die Anpresskraft des entlang seiner bogenförmigen Führungsbahn bewegten Stranges an die oberen Führungsrollen (12) jeweils gemessen wird und daraus abgeleitete Signale für die Überwachung der Reibkräfte im Kokillenbereich verwendet wird.A method according to claim 13 or 14, characterized in that the contact pressure of the strand moved along its arcuate guide track to the upper guide rollers (12) is measured in each case and signals derived therefrom for monitoring the frictional forces in the mold area is used. Verfahren nach Anspruch 13, 14 oder 15, dadurch gekennzeichnet, dass der Giessstrang (2) mehrere hintereinander angeordnete Zentriermodule (10) durchläuft, wobei der Sollverlauf der Führungsbahn durch je eine fest montierte, auf eine Strangseite (2a) einwirkenden Rolle (11) des jeweiligen Zentriermoduls (10) vorgegeben ist und der Giessstrang (2) mittels weiteren, auf die anderen Strangseiten (2b, 2c, 2d) einwirkenden und in im wesentlichen senkrechter Richtung zu diesen verstellbaren Führungsrollen (12, 13, 14) zentrisch geführt wird, wobei die Anpresskraft der jeweiligen Führungsrolle auf den Giessstrang (2) gesteuert eingestellt werden kann.Method according to claim 13, 14 or 15, characterized in that the casting strand (2) passes through a plurality of centering modules (10) arranged one behind the other, wherein the desired course of the guideway is determined by a fixed roller (11) acting on a strand side (2a). the respective centering module (10) is predetermined and the casting strand (2) is guided centrally by means of further guide rollers (12, 13, 14) acting on the other strand sides (2b, 2c, 2d) and in a direction substantially perpendicular thereto, wherein the pressing force of the respective guide roller on the casting strand (2) can be controlled controlled. Verfahren nach einem der Ansprüche 13 bis 16, dadurch gekennzeichnet, dass die durch die wassergekühlten und vom Giessstrang bewegten Führungsrollen (12, 13, 14) gemessene Anpresskraft zur Steuerung der Strangkühlung herangezogen wird.Method according to one of Claims 13 to 16, characterized in that the contact force measured by the water-cooled guide rollers (12, 13, 14) moved by the cast strand is used to control the strand cooling. Verfahren nach einem der Ansprüche 13 bis 17, dadurch gekennzeichnet, dass die Positionen der Führungsrollen (12, 13, 14) gemessen und daraus die aktuellen Querschnittsabmessungen des Giessstranges erfasst werden.Method according to one of claims 13 to 17, characterized in that the positions of the guide rollers (12, 13, 14) measured and from the current cross-sectional dimensions of the casting strand are detected. Verfahren nach einem der Ansprüche 13 bis 18, dadurch gekennzeichnet, dass bei Formatwechseln des Giessstranges (2) die Verstellung der Führungsrollen (12, 13, 14) automatisch eine Verstellung von mit Sprühorganen (42) bestückten Sprühlatten (7, 41) oder dergleichen, die einen Teil des Kühlmoduls (3) bilden, angesteuert werden kann.Method according to one of claims 13 to 18, characterized in that when changing the format of the cast strand (2) the adjustment of the guide rollers (12, 13, 14) automatically an adjustment of spray elements (42) equipped with spray mats (7, 41) or the like, which form part of the cooling module (3), can be controlled. Verfahren nach einem der Ansprüche 13 bis 19, dadurch gekennzeichnet, dass die Führungsrollen (12, 13, 14) annähernd mit gleichem Druck an den Giessstrang (2) angepresst werden.Method according to one of claims 13 to 19, characterized in that the guide rollers (12, 13, 14) are pressed approximately with the same pressure on the casting strand (2).
EP06405379.6A 2006-09-04 2006-09-04 Continuous casting machine and method Not-in-force EP1897636B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE502006004250T DE502006004250D1 (en) 2006-09-04 2006-09-04 Continuous casting plant and a process for continuous casting
PL06405379T PL1897636T3 (en) 2006-09-04 2006-09-04 Continuous casting machine and method
SI200630434T SI1897636T1 (en) 2006-09-04 2006-09-04 Continuous casting machine and method
ES06405379.6T ES2331532T5 (en) 2006-09-04 2006-09-04 Continuous casting installation as well as a procedure for continuous casting
PT06405379T PT1897636E (en) 2006-09-04 2006-09-04 Continuous casting machine and method
EP06405379.6A EP1897636B2 (en) 2006-09-04 2006-09-04 Continuous casting machine and method

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EP06405379.6A EP1897636B2 (en) 2006-09-04 2006-09-04 Continuous casting machine and method

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EP1897636A1 true EP1897636A1 (en) 2008-03-12
EP1897636B1 EP1897636B1 (en) 2009-07-15
EP1897636B2 EP1897636B2 (en) 2014-09-10

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DE (1) DE502006004250D1 (en)
ES (1) ES2331532T5 (en)
PL (1) PL1897636T3 (en)
PT (1) PT1897636E (en)
SI (1) SI1897636T1 (en)

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Publication number Priority date Publication date Assignee Title
WO2009089843A1 (en) * 2008-01-14 2009-07-23 Concast Ag Continuous casting system particularly for long steel products, and a method for continuous casting
CN110935855A (en) * 2018-09-25 2020-03-31 首要金属科技奥地利有限责任公司 Roller carrier with elastically mounted support rollers

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JPS57130752A (en) * 1981-02-03 1982-08-13 Sumitomo Heavy Ind Ltd Continuous casting machine
DE3305660A1 (en) * 1982-02-19 1983-09-08 Hitachi, Ltd., Tokyo Process and apparatus for correcting the contour of a billet for a continuous casting plant
DE10051959A1 (en) * 2000-10-20 2002-05-02 Sms Demag Ag Method and device for continuous casting and subsequent shaping of a steel casting strand, in particular a casting strand with block format or pre-profile format

Cited By (5)

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Publication number Priority date Publication date Assignee Title
WO2009089843A1 (en) * 2008-01-14 2009-07-23 Concast Ag Continuous casting system particularly for long steel products, and a method for continuous casting
CN110935855A (en) * 2018-09-25 2020-03-31 首要金属科技奥地利有限责任公司 Roller carrier with elastically mounted support rollers
WO2020064448A1 (en) * 2018-09-25 2020-04-02 Primetals Technologies Austria GmbH Roller stand having elastically mounted supporting rollers
JP2022502266A (en) * 2018-09-25 2022-01-11 プライメタルズ・テクノロジーズ・オーストリア・ゲーエムベーハー Rolling stand with elastically mounted support rolls
US11660665B2 (en) 2018-09-25 2023-05-30 Primetals Technologies Austria GmbH Roller stand having elastically mounted supporting rollers

Also Published As

Publication number Publication date
PT1897636E (en) 2009-10-20
EP1897636B1 (en) 2009-07-15
SI1897636T1 (en) 2009-12-31
PL1897636T3 (en) 2010-01-29
EP1897636B2 (en) 2014-09-10
DE502006004250D1 (en) 2009-08-27
ES2331532T5 (en) 2014-11-04
ES2331532T3 (en) 2010-01-07

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