EP1356879B1 - Continuous casting mould - Google Patents

Continuous casting mould Download PDF

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Publication number
EP1356879B1
EP1356879B1 EP03004607A EP03004607A EP1356879B1 EP 1356879 B1 EP1356879 B1 EP 1356879B1 EP 03004607 A EP03004607 A EP 03004607A EP 03004607 A EP03004607 A EP 03004607A EP 1356879 B1 EP1356879 B1 EP 1356879B1
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EP
European Patent Office
Prior art keywords
coolant
row
bores
casting
copper plate
Prior art date
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EP03004607A
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German (de)
French (fr)
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EP1356879A3 (en
EP1356879A2 (en
Inventor
Karl Rittner
Uwe Kopfstedt
Wolfgang Dr. Hennig
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SMS Siemag AG
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SMS Demag 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • 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
    • B22D11/055—Cooling the moulds

Definitions

  • the invention relates to a continuous casting mold for liquid metals, in particular for liquid steel, which can be cast at different casting speeds, approximately between 3 m / min to 10 m / min, wherein different thicknesses of the cast strand are provided as a slab as well as a thin slab and the heat by means can be discharged through guided in the direction of casting channels coolant.
  • the invention is based, to propose a vote of a minimum number of parameters of fundamental importance for the generation of a faultless end product the task.
  • the currently used version of the copper plates has a continuous row of cooling holes with a certain distance from each other.
  • This design is improved by arranging the coolant passages consisting of coolant bores in the copper plate with a predetermined distance from the hot side of the copper plate.
  • the distance in the row over the copper plate width and the flow cross sections of the coolant channels are matched to one another.
  • the coolant bores extend at a predetermined distance from each other across the width of the copper plate and with a predetermined length over the height of the copper plate.
  • the cooling intensity in the area of the meniscus is thereby enhanced by providing, for higher casting speeds with respect to the hot side, in addition to a front, first row of coolant bores, at least one second row of coolant bores arranged to the first row at an increased distance from the hot side is.
  • the casting speed can basically be increased considerably.
  • the introduction of a second row of coolant bores may be configured as another improvement in that the second row of coolant bores each has a coolant hole spaced apart from the hot side, between two coolant bores of the first row.
  • Improved heat dissipation may also be aided in that the second series of offset coolant bores is provided over an upper portion or over the entire height of the copper plate.
  • a cooling intensity change before or during the casting operation is possible in that the coolant holes of the first row and the second row are each connected to a separate coolant circuit.
  • a further embodiment consists in that the flow direction of the coolant in the first row and in the second row respectively from top to bottom or vice versa. In the return, the coolant quantities of two rows of coolant holes are regulated according to the required cooling intensity
  • the coolant quantities of the first row and the second row of coolant bores can be regulated as a function of the respective casting speed.
  • a vote can be made such that is passed for a low casting speed of the main flow of the coolant through the first row of coolant holes and a partial flow of the coolant through a reduced in the height of the mold plate length or the entire length of coolant holes.
  • the main flow of the coolant is carried out by a second row, which is designed in the height of the mold plate of reduced length or overall length from coolant bores and only a partial flow of the coolant through the first row of coolant bores.
  • the continuous casting mold consists on its broad sides (for slabs or thin slab cross-sections) of copper plates 1 with a copper plate thickness 1a, for example, 25 mm thickness.
  • the continuous casting mold forms in the exemplary embodiment a so-called funnel mold, as indicated on the hot side 4.
  • funnel coasters are eg in CSP systems used.
  • One of the broad sides bounds the liquid metal 5, in particular the liquid steel, and thus forms the hot side 4, wherein the liquid casting metal 5 is constantly maintained at the level of the bath level 4a.
  • the copper plate remaining thickness 1 c in front of a coolant channel 2 toward the hot side 4 is tuned.
  • the coolant channels 2 consisting of coolant holes 2a in the copper plate 1 are arranged at a predetermined distance 6, which substantially corresponds to the copper plate residual thickness 1c, to the hot side 4 of the copper plate 1 and a distance 7 between the next coolant hole 2a has.
  • Another criterion of the vote forms in addition to the distance 7 over the width 1b of the copper plate 1 a predetermined length 8 on the height 9 of the copper plate 1.
  • the length 8 may extend over the entire height 9 or the height 8 only extends into a middle Area and the lower area is cooled as before via cooling slots (not shown).
  • first row 10 of the coolant holes 2a at least one to the first row 10 at an increased distance 11 to the hot side 4, a second row 12 of coolant holes 2a arranged.
  • Row 10 is always used for the normal casting operation up to about 6 m / min. In this case, a partial flow for the row 12 is possible.
  • this second row 12 of coolant bores 2a is in each case an enlarged distance 11 to the hot side 4 arranged coolant bore 2a, which lies between two coolant holes 2a of the first row 10 (see. Fig. 3 ).
  • the second row 12 of offset coolant holes 2 a can only be provided over an upper portion, the length 8, in the copper plate 1.
  • the coolant holes 2a can also extend over the full height 9 of the copper plate 1.
  • the coolant holes 2a of the first row 10 and the second row 12 are each connected to a separate coolant circuit, which are operated alternately or simultaneously.
  • the diameters of the coolant bores 2a in the first row 10 can also be selected larger than the diameters of the coolant bores 2a in the second row 12. This results in different distances 11 to the hot side. 4
  • the flow direction 13 of the coolant 3 extends in the first row 10 and in the second row 12 each from top to bottom.
  • the further vote on different casting speeds of the liquid metal 5 is effected by; the coolant quantities of the first row 10 and the second row 12 of coolant bores 2a are regulated as a function of the respective casting speed (cf. Fig. 4 ).
  • the main flow of the coolant 3 is guided through the first row 10 of coolant bores 2a and a partial flow of the coolant 3 through the length 14 of the coolant bore 2a which is reduced in the height 9 of the mold plate 1.
  • Fig. 5 are the hot-side temperatures occurring in CSP plants depending on the casting speeds, the coolant velocities and the thickness 1a of the mold copper plates 1 can be seen.

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

Abstract

In order to generate a faultless final product, a minimum number of basic parameters are set by the fact that residual depth (1c) of copper plates in front of a channel (2) for coolants (3) towards the hot side (4) along with the structure and dimensions of the channels and the coolant flow speed are all matched to the total range of pouring rates for molten metal (5).

Description

Die Erfindung betrifft eine Stranggießkokille für flüssige Metalle, insbesondere für flüssigen Stahl, die mit unterschiedlichen Gießgeschwindigkeiten, etwa zwischen 3 m/min bis 10 m/min vergießbar sind, wobei unterschiedliche Dicken des Gießstrangs als Bramme sowie auch als Dünnbramme vorgesehen sind und die Wärme mittels durch in Gießrichtung verlaufende Kanäle geführtes Kühlmittel abführbar ist.The invention relates to a continuous casting mold for liquid metals, in particular for liquid steel, which can be cast at different casting speeds, approximately between 3 m / min to 10 m / min, wherein different thicknesses of the cast strand are provided as a slab as well as a thin slab and the heat by means can be discharged through guided in the direction of casting channels coolant.

Es sind verschiedene Anordnungen von Kühlmittel-Kanälen bekannt ( EP 1 025 930 A1 ; DE 195 81 604 T1 ), die jedoch der Bedeutung des Wärmeübergangs nicht ihre volle Aufmerksamkeit schenken oder die die üblichen schlitzförmigen Kühlmittel-Kanäle anwenden. Diese wiederum berücksichtigen mehr die Tiefe der Schlitze und deren seitlichen Abstand ( DE 38 40 448 C2 ).Various arrangements of coolant channels are known ( EP 1 025 930 A1 ; DE 195 81 604 T1 ), which, however, do not pay full attention to the importance of heat transfer or which use the usual slot-shaped coolant channels. These in turn take into account more the depth of the slots and their lateral spacing ( DE 38 40 448 C2 ).

Die Bestrebungen, eine höhere Gießgeschwindigkeit und damit höhere Produktion oder Endlos-Walzen ( in CSP-Anlagen) von aus der Stranggießmaschine austretendem prozesswarmem Stranggut durchzuführen, setzen wegen der an die Walzgeschwindigkeiten anzunähernden Gießgeschwindigkeiten einen höheren Massenfluss zwischen der Gießmaschine und der Walzstraße voraus und bedeuten eine Erhöhung der Gießgeschwindigkeit. Je nach der Querschnittsform und den Gießabmessungen liegen die Gießgeschwindigkeiten bis 10 m / min oder höher, wobei die oberen Werte noch nicht genutzt oder noch nicht erreicht werden.The efforts to perform a higher casting speed and thus higher production or continuous rolling (in CSP plants) exiting from the continuous casting process warm extrudates, due to the approaching to the rolling speeds casting speeds a higher mass flow between the caster and the rolling mill ahead and mean one Increasing the casting speed. Depending on the cross-sectional shape and the casting dimensions, the casting speeds are up to 10 m / min or higher, although the upper values have not yet been used or have not yet been reached.

Für das Erreichen der hohen Gießgeschwindigkeiten ist ein deutlich höherer Wärmeübergang in der Stranggießkokille zur herkömmlichen Brammentechnik notwendig.To achieve the high casting speeds, a significantly higher heat transfer in the continuous casting mold for conventional slab technology is necessary.

Aus einer Vielzahl von CSP-Anlagen, die im Bereich von 6 m/min bis 6,5 m/min Gießgeschwindigkeit arbeiten und unter Produktionsbedingungen im Sequenzbetrieb betrieben werden, wurden Erfahrungen über die Wärmeabfuhr im und unmittelbar unter dem Meniskus-Bereich des Gießmetalls gesammelt. Demzufolge sind die Einflussgrößen auf den Wärmeübergang zwischen dem flüssigen Metall und dem Kühlmittel folgende Größen:

  • Kupferdicke im Abstand zwischen der Heißseite und dem Kühlmittel-Kanal
  • Strömungsgeschwindigkeit des Kühlmittels im Kühlmittel-Kanal
  • Strömungsrichtung des Kühlmittels
  • Form der Kühlmittel-Kanäle (Bohrungen oder Schlitze)
  • Druckverlust des Kühlmittels in der gesamten Stranggießkokille
  • verwendetes Gießpulver und
  • Eingangstemperatur des Kühlmittels.
From a variety of CSP plants operating in the range of 6 m / min to 6.5 m / min casting speed and operating under production conditions in sequence operation, experience was gained on the heat dissipation in and just below the meniscus region of the cast metal. Consequently, the factors influencing the heat transfer between the liquid metal and the coolant are the following quantities:
  • Copper thickness at the distance between the hot side and the coolant channel
  • Flow velocity of the coolant in the coolant channel
  • Flow direction of the coolant
  • Shape of coolant channels (holes or slots)
  • Pressure loss of the coolant throughout the continuous casting mold
  • used casting powder and
  • Inlet temperature of the coolant.

Diese Parameter stehen teilweise in einem unmittelbaren und teilweise in einem mittelbaren Zusammenhang.These parameters are partly in an immediate and partly in an indirect context.

Der Erfindung liegt die Aufgabe zugrunde, für die Erzeugung eines fehlerfreien Endproduktes eine Abstimmung einer Mindestanzahl von Parametern mit grundlegender Bedeutung vorzuschlagen.The invention is based, to propose a vote of a minimum number of parameters of fundamental importance for the generation of a faultless end product the task.

Die gestellte Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst.The stated object is achieved by the features of claim 1.

Dadurch können wachsende Gießgeschwindigkeiten von Anlage zu Anlage mit einem einheitlichen Kühlsystem (Kühlmittel-Kanäle und Wasserkästen) bewältigt werden.As a result, increasing casting speeds can be managed from plant to plant with a uniform cooling system (coolant channels and water boxes).

Die derzeit verwendete Ausführung der Kupferplatten weist eine durchgehende Reihe von Kühlbohrungen mit bestimmtem Abstand zueinander auf. Diese Gestaltung wird dadurch verbessert, dass die aus Kühlmittel-Bohrungen in der Kupferplatte bestehenden Kühlmittel-Kanäle mit einem vorherbestimmten Abstand zur Heißseite der Kupferplatte angeordnet sind. Dadurch werden außer dem Heißseiten-Abstand noch der Abstand in der Reihe über die Kupferplatten-Breite und die Strömungsquerschnitte der Kühlmittel-Kanäle aufeinander abgestimmt.The currently used version of the copper plates has a continuous row of cooling holes with a certain distance from each other. This design is improved by arranging the coolant passages consisting of coolant bores in the copper plate with a predetermined distance from the hot side of the copper plate. As a result, in addition to the hot side spacing, the distance in the row over the copper plate width and the flow cross sections of the coolant channels are matched to one another.

Um bestimmte Kupferwanddicken vor dem Kühlmittel für eine entsprechende Produktqualität einzuhalten, wird ferner vorgeschlagen, dass die Kühlmittel-Bohrungen mit einem vorherbestimmten Abstand zueinander über die Breite der Kupferplatte und mit einer vorherbestimmten Länge über die Höhe der Kupferplatte verlaufen.In order to maintain certain copper wall thicknesses in front of the coolant for a corresponding product quality, it is further proposed that the coolant bores extend at a predetermined distance from each other across the width of the copper plate and with a predetermined length over the height of the copper plate.

Die Kühlungs-Intensität im Bereich des Meniskus wird dadurch verstärkt, indem für höhere Gießgeschwindigkeiten in Bezug auf die Heißseite zusätzlich zu einer vorderen, ersten Reihe der Kühlmittel-Bohrungen zumindest eine zur ersten Reihe mit vergrößertem Abstand zur Heißseite angeordnete zweite Reihe von Kühlmittel-Bohrungen vorgesehen ist. Dadurch kann die Gießgeschwindigkeit grundsätzlich erheblich erhöht werden.The cooling intensity in the area of the meniscus is thereby enhanced by providing, for higher casting speeds with respect to the hot side, in addition to a front, first row of coolant bores, at least one second row of coolant bores arranged to the first row at an increased distance from the hot side is. As a result, the casting speed can basically be increased considerably.

Die Einführung einer zweiten Reihe von Kühlmittel-Bohrungen kann als eine andere Verbesserung dadurch gestaltet werden, dass die zweite Reihe von Kühlmittel-Bohrungen jeweils eine mit vergrößertem Abstand zur Heißseite angeordnete Kühlmittel-Bohrung zwischen zwei Kühlmittel-Bohrungen der ersten Reihe aufweist.The introduction of a second row of coolant bores may be configured as another improvement in that the second row of coolant bores each has a coolant hole spaced apart from the hot side, between two coolant bores of the first row.

Eine verbesserte Wärmeabfuhr kann außerdem dahingehend unterstützt werden, dass die zweite Reihe von versetzten Kühlmittel-Bohrungen über einen oberen Teilbereich oder auch über die gesamte Höhe der Kupferplatte vorgesehen ist.Improved heat dissipation may also be aided in that the second series of offset coolant bores is provided over an upper portion or over the entire height of the copper plate.

Nach der weiteren Erfindung ist eine Kühlintensitäts-Änderung vor oder während des Gießbetriebs dadurch möglich, dass die Kühlmittel-Bohrungen der ersten Reihe und der zweiten Reihe jeweils an einen separaten Kühlmittel-Kreislauf angeschlossen sind. Dafür kann eine konstruktive Gestaltung von getrennten Wasserkästen, auf denen die Kupferplattenbreitseiten aufliegen und befestigt sind, gewählt werden.According to the further invention, a cooling intensity change before or during the casting operation is possible in that the coolant holes of the first row and the second row are each connected to a separate coolant circuit. For a constructive design of separate water boxes on which the Kupferplattenbreitseiten rest and are fixed to be selected.

Eine weitere Ausgestaltung besteht darin, dass die Strömungsrichtung des Kühlmittels in der ersten Reihe und in der zweiten Reihe jeweils von oben nach unten oder umgekehrt verläuft. Im Rücklauf werden die Kühlmittel-Mengen von zwei Kühlmittel-Bohrungsreihen entsprechend der benötigten Kühl-Intensität geregeltA further embodiment consists in that the flow direction of the coolant in the first row and in the second row respectively from top to bottom or vice versa. In the return, the coolant quantities of two rows of coolant holes are regulated according to the required cooling intensity

Für eine solche Regelung ist nach weiteren Merkmalen vorgesehen, dass die Kühlmittel-Mengen der ersten Reihe und der zweiten Reihe von Kühlmittel-Bohrungen in Abhängigkeit der jeweiligen Gießgeschwindigkeit regelbar sind.For such a regulation, it is provided according to further features that the coolant quantities of the first row and the second row of coolant bores can be regulated as a function of the respective casting speed.

Dabei kann eine Abstimmung derart erfolgen, dass für eine niedrige Gießgeschwindigkeit der Hauptstrom des Kühlmittels durch die erste Reihe von Kühlmittel-Bohrungen und ein Teilstrom des Kühlmittels durch eine in der Höhe der Kokillenplatte reduzierte Länge oder die gesamte Länge von Kühlmittel-Bohrungen geführt ist.In this case, a vote can be made such that is passed for a low casting speed of the main flow of the coolant through the first row of coolant holes and a partial flow of the coolant through a reduced in the height of the mold plate length or the entire length of coolant holes.

Für eine andere Ausführungsform der Regelung ist vorgesehen, dass für die höheren Gießgeschwindigkeiten der Hauptstrom des Kühlmittels durch eine im der Höhe der Kokillenplatte mit reduzierter Länge oder gesamte Länge ausgeführte, zweite Reihe von Kühlmittel-Bohrungen und nur ein Teilstrom des Kühlmittels durch die erste Reihe von Kühlmittel-Bohrungen geführt ist. Somit ist eine nahezu stufenlose Wahl der Kupferplattendicke vor dem Kühlmittel entsprechend den Gießgeschwindigkeiten und den damit verknüpften Wärmeübergängen möglich.For another embodiment of the scheme it is provided that, for the higher casting speeds, the main flow of the coolant is carried out by a second row, which is designed in the height of the mold plate of reduced length or overall length from coolant bores and only a partial flow of the coolant through the first row of coolant bores. Thus, a nearly stepless choice of copper plate thickness before the coolant according to the casting speeds and the associated heat transfer is possible.

Gleichzeitig kann die Lebensdauer bzw. die Standzeit der Kokillenplatten erhöht werden. Bisher wurden bei nur einer Kühlmittel-Bohrungsreihe und bei hoher Gießgeschwindigkeit verringerte Standzeiten erzielt.At the same time, the life or the service life of the mold plates can be increased. So far, reduced service life has been achieved with only one row of coolant holes and high casting speed.

In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt, die nachstehend näher erläutert werden.In the drawings, embodiments of the invention are shown, which are explained in more detail below.

Es zeigen:

Fig. 1
eine Vorderansicht auf eine Breitseite der Kupferplatte,
Fig. 2
eine zu Fig. 1 gehörende Draufsicht,
Fig. 3
ein Diagramm der Temperaturverteilung über die Höhe der Kupferplatte,
Fig. 4
eine Einzelheit "X" in vergrößertem Maßstab aus Fig. 2 zur Anordnung und Verteilung der Kühlmittel-Bohrungen von oben gesehen und
Fig. 5
ein Diagramm der Kokillen-Heißseiten-Temperatur über der Gießgeschwindigkeit, in Abhängigkeit der Kupferplattendicke.
Show it:
Fig. 1
a front view on a broad side of the copper plate,
Fig. 2
one too Fig. 1 belonging top view,
Fig. 3
a diagram of the temperature distribution over the height of the copper plate,
Fig. 4
a detail "X" on an enlarged scale Fig. 2 for arranging and distributing the coolant holes seen from above and
Fig. 5
a graph of the mold hot side temperature over the casting speed, depending on the copper plate thickness.

Die Stranggießkokille besteht an ihren Breitseiten ( für Brammen oder Dünnbrammen-Querschnitte) aus Kupferplatten 1 mit einer Kupferplattendicke 1a, von z.B. 25 mm Dicke. Die Stranggießkokille bildet im Ausführungsbeispiel eine sog. Trichterkokille, wie auf der Heißseite 4 angedeutet ist. Solche Trichterkokillen werden z.B. in CSP-Anlagen eingesetzt. Eine der Breitseiten begrenzt das flüssige Metall 5, insbesondere den flüssigen Stahl, und bildet damit die Heißseite 4, wobei das flüssige Gießmetall 5 ständig auf dem Niveau des Badspiegels 4a gehalten wird.The continuous casting mold consists on its broad sides (for slabs or thin slab cross-sections) of copper plates 1 with a copper plate thickness 1a, for example, 25 mm thickness. The continuous casting mold forms in the exemplary embodiment a so-called funnel mold, as indicated on the hot side 4. Such funnel coasters are eg in CSP systems used. One of the broad sides bounds the liquid metal 5, in particular the liquid steel, and thus forms the hot side 4, wherein the liquid casting metal 5 is constantly maintained at the level of the bath level 4a.

Das durch Kühlmittel-Kanäle 2, hier kreisrunde Kühlmittel-Bohrungen 2a, strömende Kühlmittel 3 (Kühlwasser mit oder ohne Zusätze) führt die Wärme des flüssigen Metalls ab, so dass, wie in Fig. 3 dargestellt ist, der Temperaturverlauf 4b am Badspiegel 4a steil ansteigt und knapp unterhalb einen Höhepunkt erreicht, von dem aus gesehen die Temperatur bis zum Ausgang der Kupferplatte 1 abfällt.The through coolant channels 2, here circular coolant holes 2 a, flowing coolant 3 (cooling water with or without additives) dissipates the heat of the liquid metal, so that, as in Fig. 3 is shown, the temperature profile 4b rises steeply at the bathroom mirror 4a and reaches just below a peak, seen from the temperature drops to the output of the copper plate 1.

Wie schon beschrieben, ist es zweckmäßig und vorteilhaft, dass die Kupferplatten-Restdicke 1 c vor einem Kühlmittel-Kanal 2 zur Heißseite 4 hin, die Anordnung und die Abmessungen der Kühlmittel-Kanäle 2 und die Strömungsgeschwindigkeit des Kühlmittels 3 auf den gesamten Bereich der Gießgeschwindigkeit für das Gießmetall 5 abgestimmt wird.As already described, it is expedient and advantageous that the copper plate remaining thickness 1 c in front of a coolant channel 2 toward the hot side 4, the arrangement and the dimensions of the coolant channels 2 and the flow rate of the coolant 3 over the entire range of casting speed for the casting metal 5 is tuned.

Ein Gesichtspunkt der Abstimmung bildet dabei, dass die aus Kühlmittel-Bohrungen 2a in der Kupferplatte 1 bestehenden Kühlmittel-Kanäle 2 mit einem vorherbestimmten Abstand 6, der der Kupferplatten-Restdicke 1c im wesentlichen entspricht, zur Heißseite 4 der Kupferplatte 1 angeordnet sind und einen Abstand 7 zwischen der nächsten Kühlmittel-Bohrung 2a besitzt. Ein weiteres Kriterium der Abstimmung bildet neben dem Abstand 7 über die Breite 1b der Kupferplatte 1 eine vorherbestimmte Länge 8 über die Höhe 9 der Kupferplatte 1. Dabei kann die Länge 8 über die gesamte Höhe 9 reichen oder die Höhe 8 reicht nur bis in einen mittleren Bereich und der untere Bereich wird wie bisher über Kühlschlitze (nicht gezeichnet) gekühlt.One aspect of the tuning is that the coolant channels 2 consisting of coolant holes 2a in the copper plate 1 are arranged at a predetermined distance 6, which substantially corresponds to the copper plate residual thickness 1c, to the hot side 4 of the copper plate 1 and a distance 7 between the next coolant hole 2a has. Another criterion of the vote forms in addition to the distance 7 over the width 1b of the copper plate 1 a predetermined length 8 on the height 9 of the copper plate 1. The length 8 may extend over the entire height 9 or the height 8 only extends into a middle Area and the lower area is cooled as before via cooling slots (not shown).

Gemäß den Fig. 1 und 2 ist für höhere Gießgeschwindigkeiten in Bezug auf die Heißseite 4 zusätzlich zu einer vorderen, ersten Reihe 10 der Kühlmittel-Bohrungen 2a zumindest eine zur ersten Reihe 10 mit vergrößertem Abstand 11 zur Heißseite 4 eine zweite Reihe 12 aus Kühlmittel-Bohrungen 2a angeordnet. Die Reihe 10 wird immer für den normalen Gießbetrieb zur Zeit bis ca. 6 m/min verwendet. Dabei ist auch ein Teilstrom für die Reihe 12 möglich. Bei Einsatz der Reihe 12 ist diese zweite Reihe 12 von Kühlmittel-Bohrungen 2a jeweils eine mit vergrößertem Abstand 11 zur Heißseite 4 angeordnete Kühlmittel-Bohrung 2a, die zwischen zwei Kühlmittel-Bohrungen 2a der ersten Reihe 10 liegt (vgl. Fig. 3). Die zweite Reihe 12 aus versetzten Kühlmittel-Bohrungen 2a kann nur über einen oberen Teilbereich, der Länge 8, in der Kupferplatte 1 vorgesehen sein. Die Kühlmittel-Bohrungen 2a können auch über die volle Höhe 9 der Kupferplatte 1 verlaufen.According to the Fig. 1 and 2 is for higher casting speeds with respect to the hot side 4 in addition to a front, first row 10 of the coolant holes 2a at least one to the first row 10 at an increased distance 11 to the hot side 4, a second row 12 of coolant holes 2a arranged. Row 10 is always used for the normal casting operation up to about 6 m / min. In this case, a partial flow for the row 12 is possible. When using the row 12, this second row 12 of coolant bores 2a is in each case an enlarged distance 11 to the hot side 4 arranged coolant bore 2a, which lies between two coolant holes 2a of the first row 10 (see. Fig. 3 ). The second row 12 of offset coolant holes 2 a can only be provided over an upper portion, the length 8, in the copper plate 1. The coolant holes 2a can also extend over the full height 9 of the copper plate 1.

Für eine Regelung der abzuführenden Wärmemenge pro Zeiteinheit sind die Kühlmittel-Bohrungen 2a der ersten Reihe 10 und der zweiten Reihe 12 jeweils an einen separaten Kühlmittel-Kreislauf angeschlossen, die wechselweise oder gleichzeitig betätigt werden.For a control of the amount of heat to be dissipated per unit time, the coolant holes 2a of the first row 10 and the second row 12 are each connected to a separate coolant circuit, which are operated alternately or simultaneously.

Die Durchmesser der Kühlmittel-Bohrungen 2a in der ersten Reihe 10 können auch größer als die Durchmesser der Kühlmittel-Bohrungen 2a in der zweiten Reihe 12 gewählt werden. Dadurch ergeben sich unterschiedliche Abstände 11 zur Heißseite 4.The diameters of the coolant bores 2a in the first row 10 can also be selected larger than the diameters of the coolant bores 2a in the second row 12. This results in different distances 11 to the hot side. 4

Die Strömungsrichtung 13 des Kühlmittels 3 verläuft in der ersten Reihe 10 und in der zweiten Reihe 12 jeweils von oben nach unten.The flow direction 13 of the coolant 3 extends in the first row 10 and in the second row 12 each from top to bottom.

Die weitere Abstimmung auf unterschiedliche Gießgeschwindigkeiten des flüssigen Metalls 5 (Flüssigstahl) erfolgt dadurch; dass die Kühlmittel-Mengen der ersten Reihe 10 und der zweiten Reihe 12 aus Kühlmittel-Bohrungen 2a in Abhängigkeit der jeweiligen Gießgeschwindigkeit geregelt werden (vgl. Fig. 4).The further vote on different casting speeds of the liquid metal 5 (liquid steel) is effected by; the coolant quantities of the first row 10 and the second row 12 of coolant bores 2a are regulated as a function of the respective casting speed (cf. Fig. 4 ).

Für eine niedrige Gießgeschwindigkeit wird der Hauptstrom des Kühlmittels 3 durch die erste Reihe 10 aus Kühlmittel-Bohrungen 2a und ein Teilstrom des Kühlmittels 3 durch die in der Höhe 9 der Kokillenplatte 1 reduzierte Länge 14 der Kühlmittel-Bohrung 2a geführt.For a low casting speed, the main flow of the coolant 3 is guided through the first row 10 of coolant bores 2a and a partial flow of the coolant 3 through the length 14 of the coolant bore 2a which is reduced in the height 9 of the mold plate 1.

Für die höheren Gießgeschwindigkeiten wird der Hauptstrom des Kühlmittels 3 durch die in der Höhe 9 der Kokillenplatte 1 mit kürzerer Länge 14 ausgeführte Reihe 12 aus Kühlmittel-Bohrungen 2a und nur ein Teilstrom des Kühlmittels 3 durch die erste Reihe 10 aus Kühlmittel-Bohrungen 2a geführt.For the higher casting speeds of the main flow of the coolant 3 is performed by the running in the height of 9 of the mold plate 1 with shorter length 14 row 12 of coolant holes 2a and only a partial flow of the coolant 3 through the first row 10 of coolant holes 2a.

In Fig. 5 sind die in CSP-Anlagen auftretenden Heißseiten-Temperaturen in Abhängigkeit der Gießgeschwindigkeiten, der Kühlmittel-Geschwindigkeiten und der Dicke 1a der Kokillen-Kupferplatten 1 ersichtlich.In Fig. 5 are the hot-side temperatures occurring in CSP plants depending on the casting speeds, the coolant velocities and the thickness 1a of the mold copper plates 1 can be seen.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Kupferplatte (Breitseite der Stranggießkokille)Copper plate (broad side of the continuous casting mold)
1a1a
Kupferplatten-DickeCopper plate thickness
1b1b
Kupferplatten-BreiteCopper plate width
1c1c
Kupferplatten-RestdickeCopperplate residual thickness
22
Kühlmittel-KanalCoolant channel
2a2a
Kühlmittel-BohrungCoolant bore
33
Kühlmittel (Wasser mit oder ohne Zusätze)Coolant (water with or without additives)
44
Heißseitehot side
4a4a
BadspiegelBathroom mirror
4b4b
Temperaturverlauftemperature curve
55
flüssiges Gießmetall (flüssiger Stahl)liquid casting metal (liquid steel)
66
Abstand zur HeißseiteDistance to the hot side
77
Abstand in der BreiteDistance in width
88th
Länge des Kühlmittel-KanalsLength of the coolant channel
99
Höhe der KupferplatteHeight of the copper plate
1010
vordere, erste Reihe aus Kühlmittel-Bohrungenfront, first row of coolant holes
1111
vergrößerter Abstand zur Heißseiteincreased distance to the hot side
1212
zweite Reihe aus Kühlmittel-Bohrungensecond row of coolant holes
1313
Strömungsrichtung des KühlmittelsFlow direction of the coolant
1414
Reduzierte LängeReduced length

Claims (8)

  1. Continuous casting mould, which has copper plates (1) at the wide sides thereof, for casting of liquid metals, particularly for liquid steel, which can be cast at different casting speeds between approximately 3 m/min to 10 m/min, wherein different thicknesses of the cast strip such as a slab as well as a thin slab are provided, wherein the copper plates (1) have channels (2) running in casting direction, wherein coolant (3) led through the channels (2) conducts away the heat and the copper plate residual thickness (1c) in front of a channel (2) for the coolant (3) relative to the hot side (4), the arrangement and the dimensions of the channels (2) and the flow speed of the coolant (3) are matched to the entire range of the casting speeds for the cast metal (5), wherein the coolant channels (2), which consist of coolant bores (2a) in the copper plate (1), are arranged at a predetermined spacing (6) from the hot side (4) of the copper plate (1) and the coolant bores (2a) extend at a predetermined spacing (7) relative to one another over the width (1b) of the copper plate (1) and with a predetermined length (8) over the height (9) of the copper plate (1), characterised in that for higher casting speeds with respect to the hot side (4) there is provided, additionally to a front first row (10) of the coolant bores (2a), at least one second row (12), which is arranged with increased spacing (11) from the hot side (4) relative to the first row (10), of coolant bores (2a).
  2. Continuous casting mould according to claim 1, characterised in that the second row (12) of coolant.bores (2a) has a respective coolant bore (2a), which is arranged with increased spacing (11) from the hot side (4), between two coolant bores (2a) of the first row (10).
  3. Continuous casting mould according to one of claims 1 and 2, characterised in that the second row (12) of offset coolant bores (2a) is provided over an upper part region or also over the entire height (9) of the copper plate (1).
  4. Continuous casting mould according to one of claims 1 to 3, characterised in that the coolant bores (2a) of the first row (10) and the second row (12) are each connected with a respective separate coolant circuit.
  5. Method for use of a continuous casting mould according to one of claims 1 to 4, characterised in that the flow direction (13) of the coolant (3) in the first row (10) and in the second row (12) runs respectively from above to below or conversely.
  6. Method according to claim 5, characterised in that the coolant quantities of the first row (10) and the second row (12) of coolant bores (2a) can be regulated in dependence on the respective casting speed.
  7. Method according to claim 5 or 6, characterised in that for a low casting speed the main flow of the coolant (3) is conducted through the first row (10) of coolant bores (2a) and a part flow of the coolant (3) is conducted through a length (14) reduced in the height (9) of the mould plate (1) or through the entire length (14) of coolant bores (2a).
  8. Method according to one of claims 5, 6 and 7, characterised in that for higher flow speeds the main flow of the coolant (3) is conducted through a second row (12), which is constructed with reduced length in the height (9) of the mould plate (12) or with the entire length (14), of coolant bores (2a) and only a part flow of the coolant (3) is conducted through the first row (10) of coolant bores (2a).
EP03004607A 2002-04-23 2003-03-01 Continuous casting mould Expired - Lifetime EP1356879B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10217906 2002-04-23
DE10217906A DE10217906A1 (en) 2002-04-23 2002-04-23 Continuous casting mold for liquid metals, especially for liquid steel

Publications (3)

Publication Number Publication Date
EP1356879A2 EP1356879A2 (en) 2003-10-29
EP1356879A3 EP1356879A3 (en) 2003-11-05
EP1356879B1 true EP1356879B1 (en) 2008-02-27

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EP03004607A Expired - Lifetime EP1356879B1 (en) 2002-04-23 2003-03-01 Continuous casting mould

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EP (1) EP1356879B1 (en)
AT (1) ATE387275T1 (en)
DE (2) DE10217906A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008032672A1 (en) 2008-07-10 2010-01-14 Sms Siemag Aktiengesellschaft continuous casting
IT1403036B1 (en) * 2010-11-25 2013-09-27 Danieli Off Mecc CRYSTALLIZER FOR CONTINUOUS CASTING
DE102017217263A1 (en) * 2017-09-28 2019-03-28 Sms Group Gmbh continuous casting

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5299627A (en) * 1992-03-03 1994-04-05 Kawasaki Steel Corporation Continuous casting method
DE19852473C5 (en) * 1998-11-13 2005-10-06 Sms Demag Ag Chill plate of a continuous casting plant
IT1310517B1 (en) * 1999-01-13 2002-02-18 Danieli Off Mecc CONTINUOUS CASTING CRYSTALLIZER

Also Published As

Publication number Publication date
EP1356879A3 (en) 2003-11-05
EP1356879A2 (en) 2003-10-29
ATE387275T1 (en) 2008-03-15
DE50309235D1 (en) 2008-04-10
DE10217906A1 (en) 2003-11-06

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