EP0996513B1 - Method and device for producing slabs - Google Patents

Method and device for producing slabs Download PDF

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Publication number
EP0996513B1
EP0996513B1 EP98934867A EP98934867A EP0996513B1 EP 0996513 B1 EP0996513 B1 EP 0996513B1 EP 98934867 A EP98934867 A EP 98934867A EP 98934867 A EP98934867 A EP 98934867A EP 0996513 B1 EP0996513 B1 EP 0996513B1
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EP
European Patent Office
Prior art keywords
mould
molten mass
melt
fact
crater
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP98934867A
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German (de)
French (fr)
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EP0996513A1 (en
Inventor
Ulrich Urlau
Hans Jürgen SCHEMEIT
Gerhard Böcher
Peter Müller
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Salzgitter AG
SMS Siemag AG
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Salzgitter AG
SMS Demag AG
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Publication of EP0996513A1 publication Critical patent/EP0996513A1/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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/0408—Moulds for casting thin slabs
    • 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
    • B22D11/10—Supplying or treating molten metal
    • 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
    • B22D11/0406—Moulds with special profile
    • 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
    • B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles

Definitions

  • the invention relates to a method for producing slabs with a thickness D> 100 mm at casting speeds v ⁇ 3m / min, in a continuous caster at which a mold from a reservoir via a dip spout melt and from the muzzle side the strand shell encompassing a swamp Strand guiding scaffold, in particular a continuous sheet caster, is withdrawn, and a corresponding continuous caster.
  • Figure 4 is at the mouth of the immersion spout Baffle element provided that the liquid melt to two openings at the Distracts narrow sides of the spout.
  • Figure 5 shows that two substreams arise with the high energy of each individual filament to swirl the Cause melt.
  • DE 43 20 723 describes an immersion nozzle, in particular for thin slab casting, known, which has a lower portion of parallel side walls. Before entering the lower section, a crossbar is provided, which the Melt flow in the direction of the extension of the lower flow shaft deflects. The narrow sides of this especially for thin slab plants The intended diving spout are guided in parallel.
  • the diving spouts known from the cited documents produce one Pouring stream that flows into the depths at a relatively high speed Swamp penetrates.
  • the invention has the aim set, a method and a corresponding continuous caster for generating of slabs at avoiding concentrations of contaminants and in particular acid gas-resistant steel grades also on continuous sheet casting machines are pourable.
  • the invention achieves the goal through the features of Process claim 1 and device claim 5.
  • the liquid melt supplied to the mold occurs in a wide range higher speed compared to the strand withdrawal speed in the liquid sump of the slab. Based on the cross-section, the supplied Melt a rectangular profile and have a depth of no more than 2 m in the swamp the same speed as the slab.
  • the supplied liquid Melt with an entry profile in the swamp which acts as a rectangle is formed
  • the immersion spout used for this has Narrow side walls that are tapered at an angle with respect to the center axis Open ⁇ from 15 to 30 °.
  • the profile created by the proposed process in the mold has this also has a positive influence on the movement of the melt in the area of Melt level in the mold and its behavior with regard to the mold powder.
  • the proposed method will produce slabs for steel grades with high demands both on the non-metallic degree of purity and on freedom from segregation, as is the case, for example, with acid gas-resistant steel grades be required, possible.
  • the reduced Inflow speed of the steel in the ones in the strand shell Swamp reduced the solidification time.
  • this allows the specific Casting capacity of the plants are increased or, on the other hand, the specific Secondary cooling reduced with a view to improved surface quality become.
  • FIG. 1 shows a storage container 11 to which an immersion spout 12 is attached
  • the immersion spout 12 has a tubular part 13 and one on the mouth side spade-shaped part 14 with the narrow sides 16 and the broad sides 17.
  • Im A throttle 15 is provided in the transition area of both immersion pouring parts.
  • the spade-shaped part 14 extends to a depth T T into a mold 21 filled with melt S, which has narrow sides 22 and broad sides 23.
  • the current threads of the melt S are shown with the melt S z supplied and the sump S B. It can be seen that the current threads penetrate into the melt S enveloped by a strand shell K with a view of the broad sides to a depth L.
  • the supplied filaments have a speed v K.
  • the flow threads In the area of the narrow sides 16 of the immersion nozzle, the flow threads have an angle ⁇ to the central axis 1 and move relatively early towards the narrow sides 22 of the mold and strive in the area of the level P of the melt to the center of the mold 21.
  • the view AA is shown with the mold 21, which the Narrow sides 22 and the broad sides 23 which form a rectangle with the Width B and thickness D and area A.
  • the immersion nozzle 12 is arranged centrally in the cavity of the mold 21 Broad sides 17 and the narrow sides 16, which form a rectangle with the width b and the thickness d and the area a.
  • FIG. 2 schematically shows a section through the continuous casting installation, here an arc continuous casting installation, with the storage container 11 and the immersion spout 12 with the tubular part 13 and the spade-shaped part 14, here the broad sides 17.
  • a throttle 15 arranged In the transition area of the immersion pouring parts 13, 14 there is a throttle 15 arranged The mouth of the immersion pouring part 14 projects into the melt S located in the mold 21 to a depth T T.
  • the broad side walls 23 of the mold 21 are shown, at the mouth end of which a strand shell K has formed from the slab, which envelops the melt S up to the swamp tip S s .
  • the strand guide rollers 24 are arranged downstream of the mold 21.
  • the supplied melt S s penetrates into the swamp S B located in the mold at a speed v K, namely at a depth T with respect to the broad sides 23. Then the swamp has a speed v B which corresponds to the slab withdrawal speed and thus also corresponds to the strand shell K.

Abstract

A process for producing slabs having a thickness D>100 mm, at casting speeds v<3 m/min, in a continuous casting installation in which melt is supplied to a permanent mold from a storage reservoir via an immersion nozzle and from which, on the aperture side, a strand shell enclosing a liquid crater is withdrawn into a strand guidance frame, in particular a bow-type continuous casting installation. The melt supplied enters the permanent mold at a speed (vK) whose relationship with respect to the strand withdrawal speed (vB) is:vK:vB=6:1 to 60:1, andthe flow filaments of the melt supplied are guided in such a way that, with regard to the melt level, they penetrate into the liquid crater over a length L<2 m over a wide front and with a profile which is rectangular in cross section.

Description

Die Erfindung betrifft ein Verfahren zum Erzeugen von Brammen, mit einer Dicke D > 100 mm bei Gießgeschwindigkeiten v < 3m/min, in einer Stranggießanlage, bei der eine Kokille aus einem Vorratsbehälter über einen Tauchausguß Schmelze zugeführt und aus der mündungsseitig die einen Sumpf umgreifende Strangschale in ein Strangführungsgerüst, insbesondere einer Bogenstranggießanlage, abgezogen wird, und eine entsprechende Stranggießeinrichtung dazu.The invention relates to a method for producing slabs with a thickness D> 100 mm at casting speeds v <3m / min, in a continuous caster at which a mold from a reservoir via a dip spout melt and from the muzzle side the strand shell encompassing a swamp Strand guiding scaffold, in particular a continuous sheet caster, is withdrawn, and a corresponding continuous caster.

Aus steel research 66 (1995) No. 7, Seite 287 bis 293 "Flow dynamics in thin Stab caster moulds" ist ein Versuchsaufbau bekannt, bei dem ein an einem Zwischenbehälter befestigter Tauchausguß in eine Kokille hineinragt. Die hier eingesetzte Kokille ist mit einer Dicke von etwa 60 mm das typische Maß für eine Anlage zum Erzeugen von Dünnbrammen und zeigt beim Einsatz eines eine offene Mündung aufweisenden Tauchausgußes (Fig. 10) einen zentralen Strahl, der tief in den Sumpf der Bramme hineinragt.From steel research 66 (1995) No. 7, pages 287 to 293 "Flow dynamics in thin rod caster molds "is a test setup in which an on an intermediate container attached diving spout protrudes into a mold. The mold used here is with a thickness of about 60 mm is the typical dimension for a plant for the production of Thin slabs and shows when using an open mouth Dipping spout (Fig. 10) a central jet that goes deep into the sump of the slab protrudes.

In einer weiteren Ausgestaltung (Figur 4) ist an der Mündung des Tauchausgußes ein Prallelement vorgesehen, die die Flüssigschmelze zu zwei Öffnungen an den Schmalseiten des Tauchausgußes ablenkt. Die Figur 5 zeigt, daß zwei Teilströme entstehen, die mit hoher Energie jedes einzelnen Stromfadens zur Verwirbelung der Schmelze führen.In a further embodiment (Figure 4) is at the mouth of the immersion spout Baffle element provided that the liquid melt to two openings at the Distracts narrow sides of the spout. Figure 5 shows that two substreams arise with the high energy of each individual filament to swirl the Cause melt.

Aus DE 43 20 723 ist ein Eintauchausguß, insbesondere zum Dünnbrammengießen, bekannt, der einen unteren Abschnitt aus parallel geführten Seitenwänden aufweist. Vor Eintritt in den unteren Abschnitt ist ein Quersteg vorgesehen, welcher die Schmelzenströmung in Richtung der Weiterung des unteren Strömungsschachtes auslenkt. Die Schmalseiten dieses insbesondere für Dünnbrammenanlagen vorgesehenen Tauchausgußes sind parallel geführt. DE 43 20 723 describes an immersion nozzle, in particular for thin slab casting, known, which has a lower portion of parallel side walls. Before entering the lower section, a crossbar is provided, which the Melt flow in the direction of the extension of the lower flow shaft deflects. The narrow sides of this especially for thin slab plants The intended diving spout are guided in parallel.

Die aus den genannten Schriften bekannten Tauchausgüsse erzeugen einen Gießstrahl, der mit relativ hoher Geschwindigkeit bis in entsprechende Tiefen in den Sumpf eindringt.The diving spouts known from the cited documents produce one Pouring stream that flows into the depths at a relatively high speed Swamp penetrates.

In Kenntnis des genannten Standes der Technik hat sich die Erfindung das Ziel gesetzt, ein Verfahren und eine entsprechende Stranggießeinrichtung zum Erzeugen von Brammen zu schaffen, bei der Konzentrationen von Verunreinigungen vermieden und insbesondere sauergasfeste Stahlgüten auch auf Bogenstranggießanlagen gießbar sind.Knowing the prior art mentioned, the invention has the aim set, a method and a corresponding continuous caster for generating of slabs at avoiding concentrations of contaminants and in particular acid gas-resistant steel grades also on continuous sheet casting machines are pourable.

Die Erfindung erreicht das Ziel durch die Merkmale des Verfahrensanspruchs 1 und des Vorrichtungsanspruchs 5.The invention achieves the goal through the features of Process claim 1 and device claim 5.

Erfindungsgemäß tritt die der Kokille zugeführte flüssige Schmelze in breiter Front mit höherer Geschwindigkeit im Vergleich zur Strangabzugsgeschwindigkeit in den flüssigen Sumpf der Bramme ein. Bezogen auf den Querschnitt weist die zugeführte Schmelze ein Rechteckprofil auf und besitzt bereits in einer Tiefe nicht größer als 2 m im Sumpf die gleiche Geschwindigkeit wie die Bramme.According to the invention, the liquid melt supplied to the mold occurs in a wide range higher speed compared to the strand withdrawal speed in the liquid sump of the slab. Based on the cross-section, the supplied Melt a rectangular profile and have a depth of no more than 2 m in the swamp the same speed as the slab.

Die Geschwindigkeit vK der zugeführten Schmelze, welche in die Kokille eintritt, verhält sich zu der Strangabzugsgeschwindigkeit vB wie vK : vB = 6:1 bis 60:1.The speed v K of the supplied melt, which enters the mold, is related to the strand withdrawal speed v B as v K : v B = 6: 1 to 60: 1.

In einer vorteilhaften Ausgestaltung der Erfindung wird die zugeführte flüssige Schmelze mit einem Eintrittsprofil in den Sumpf geführt, der als ein Rechteck ausgebildet ist, wobei sich die lichte Weite d des Rechtecks zur Schmalseite der Kokille D wie d : D = 1 : 3 bis 1 : 40 und die Breite b des Rechtecks zur Breitseite der Kokilie B sich wie b : B = 1 :7 bis 1:1,2 verhältIn an advantageous embodiment of the invention, the supplied liquid Melt with an entry profile in the swamp, which acts as a rectangle is formed, the clear width d of the rectangle to the narrow side of the Chill D as d: D = 1: 3 to 1:40 and the width b of the rectangle to the broad side of the Coconut B behaves like b: B = 1: 7 to 1: 1.2

Die den Tauchausguß verlassende Schmelze strömt in einem Breitenwinkel von α = 15 bis 30° zur Brammenabzugsrichtung in den Sumpf ein. Bezogen auf die Seite D der Kokillenschmalseite trifft die zugeführte flüssige Schmelze auf den Sumpf in einer Tiefe T = 0,1 bis 1,5 x D. Der hierzu eingesetzte Tauchausguß besitzt Schmalseitenwände, die bezogen auf die Mittenachse sich konisch unter einem Winkel α von 15 bis 30° öffnen. Der freie Querschnitt a der Mündung des Gießteils des Tauchausgusses verhält sich zum Innenquerschnitt A der Kokille wie a:A = 1:30 bis 1:300. Hierbei verhält sich die lichte Weite d des Gießteils des Tauchausgusses zur Schmalseite D der Kokille wie d:D = 1:2 bis 1:40.The melt leaving the immersion spout flows at a latitude of α = 15 to 30 ° to the slab withdrawal direction in the sump. Relating to side D On the narrow side of the mold, the liquid melt supplied hits the sump in one Depth T = 0.1 to 1.5 x D. The immersion spout used for this has Narrow side walls that are tapered at an angle with respect to the center axis Open α from 15 to 30 °. The free cross section a of the mouth of the casting of the The immersion nozzle behaves like the inner cross section A of the mold a: A = 1:30 to 1: 300. Here, the inside width d of the casting of the Immersion spout to the narrow side D of the mold as d: D = 1: 2 to 1:40.

Das durch das vorgeschlagene Verfahren in der Kokille erzeugte Profil hat darüber hinaus positiven Einfluß auf die Bewegung der Schmelze im Bereich des Schmelzenpegels in der Kokille und auf sein Verhalten bezüglich des Gießpulvers.The profile created by the proposed process in the mold has this also has a positive influence on the movement of the melt in the area of Melt level in the mold and its behavior with regard to the mold powder.

Bei dem erfindungsgemäßen Vergießen wurde überraschend festgestellt, daß die bekannten Konzentrationsunterschiede über den Brammenquerschnitt nicht auftraten und der Reinheitsgrad, bezogen auf nicht metallische Einschlüsse, im wesentlichen verbessert wurde.In the potting according to the invention it was surprisingly found that the known concentration differences across the slab cross-section did not occur and the degree of purity, based on non-metallic inclusions, essentially was improved.

Durch das vorgeschlagene Verfahren wird die Erzeugung von Brammen für Stahlgüten mit hohen Anforderungen sowohl an den nicht metallischen Reinheitsgrad als auch an die Seigerungsfreiheit, wie sie beispielsweise bei sauergasbeständigen Stahlgüten gefordert werden, möglich.The proposed method will produce slabs for steel grades with high demands both on the non-metallic degree of purity and on freedom from segregation, as is the case, for example, with acid gas-resistant steel grades be required, possible.

Weiterhin wird bei dem erfindungsgemäßen Vergießen durch die reduzierte Einströmgeschwindigkeit des Stahls in den sich in der Strangschale befindenden Sumpf die Durcherstarrungszeit reduziert. Hierdurch kann einerseits die spezifische Gießleistung der Anlagen erhöht werden oder andererseits die spezifische Sekundärkühlung im Hinblick auf eine verbesserte Oberflächenqualität reduziert werden.Furthermore, in the potting according to the invention, the reduced Inflow speed of the steel in the ones in the strand shell Swamp reduced the solidification time. On the one hand, this allows the specific Casting capacity of the plants are increased or, on the other hand, the specific Secondary cooling reduced with a view to improved surface quality become.

Ein Beispiel der Erfindung ist in der beigefügten Zeichnung dargelegtAn example of the invention is set out in the accompanying drawing

Dabei zeigt die

Figur 1
den Bereich Tauchausguß/Kokille einer Stranggießeinrichtung
Figur 2
seitliche Ansicht einer Bogenstranggießantage
The shows
Figure 1
the area of immersion pouring / mold of a continuous caster
Figure 2
side view of a continuous casting plant

Die Figur 1 zeigt einen Vorratsbehälter 11, an dem ein Tauchausguß 12 befestigt ist Der Tauchausguß 12 besitzt einen rohrförmigen Teil 13 und mündungsseitig einen spatenförmigen Teil 14 mit den Schmalseiten 16 und den Breitseiten 17. Im Übergangsbereich beider Tauchausgußteile ist eine Drossel 15 vorgesehen. FIG. 1 shows a storage container 11 to which an immersion spout 12 is attached The immersion spout 12 has a tubular part 13 and one on the mouth side spade-shaped part 14 with the narrow sides 16 and the broad sides 17. Im A throttle 15 is provided in the transition area of both immersion pouring parts.

Mündungsseitig reicht der spatenförmige Teil 14 bis zu einer Tiefe TT in eine mit Schmelze S gefüllte Kokille 21, die Schmalseiten 22 und Breitseiten 23 besitzt.On the mouth side, the spade-shaped part 14 extends to a depth T T into a mold 21 filled with melt S, which has narrow sides 22 and broad sides 23.

Im oberen Teil sind die Stromfäden der Schmelze S dargestellt mit der zugeführten Schmelze Sz und dem Sumpf SB. Es zeigt sich, daß die Stromfäden mit Blick auf die Breitseiten bis in eine Tiefe L in die von einer Strangschale K umhüllten Schmelze S eindringen. Die zugeführten Stromfäden haben eine Geschwindigkeit vK. Im Bereich der Schmalseiten 16 des Tauchausgusses weisen die Stromfäden einen Winkel α zur Mittenachse 1 auf und bewegen sich relativ früh hin zu den Schmalseiten 22 der Kokille und streben im Bereich des Pegels P der Schmelze zum Zentrum der Kokille 21.In the upper part, the current threads of the melt S are shown with the melt S z supplied and the sump S B. It can be seen that the current threads penetrate into the melt S enveloped by a strand shell K with a view of the broad sides to a depth L. The supplied filaments have a speed v K. In the area of the narrow sides 16 of the immersion nozzle, the flow threads have an angle α to the central axis 1 and move relatively early towards the narrow sides 22 of the mold and strive in the area of the level P of the melt to the center of the mold 21.

Im unteren Bereich ist die Ansicht AA dargestellt mit der Kokille 21, die die Schmalseiten 22 und die Breitseiten 23 aufweisen, die ein Rechteck bilden mit der Breite B sowie der Dicke D und der Fläche A.In the lower area, the view AA is shown with the mold 21, which the Narrow sides 22 and the broad sides 23 which form a rectangle with the Width B and thickness D and area A.

Zentrisch in den Hohlraum der Kokille 21 ist der Tauchausguß 12 angeordnet mit den Breitseiten 17 und den Schmalseiten 16, die ein Rechteck bilden mit der Breite b sowie der Dicke d und der Fläche a.The immersion nozzle 12 is arranged centrally in the cavity of the mold 21 Broad sides 17 and the narrow sides 16, which form a rectangle with the width b and the thickness d and the area a.

Die Figur 2 zeigt schematisch einen Schnitt durch die Stranggießanlage, hier eine Bogenstranggießanlage, mit dem Vorratsbehälter 11 und dem Tauchausguß 12 mit dem rohrförmigen Teil 13 und dem spatenförmigen Teil 14, hier die Breitseiten 17. Im Übergangsbereich der Tauchausgußteile 13,14 ist eine Drossel 15 angeordnet
Die Mündung des Tauchausgußteils 14 ragt in die sich in der Kokille 21 befindliche Schmelze S bis in eine Tiefe TT hinein.FIG. 2 schematically shows a section through the continuous casting installation, here an arc continuous casting installation, with the storage container 11 and the immersion spout 12 with the tubular part 13 and the spade-shaped part 14, here the broad sides 17. In the transition area of the immersion pouring parts 13, 14 there is a throttle 15 arranged
The mouth of the immersion pouring part 14 projects into the melt S located in the mold 21 to a depth T T.

Von der Kokille 21 sind die Breitseitenwände 23 dargesteltt, an deren mündungsseitigen Ende sich von der Bramme eine Strangschale K gebildet hat, die die Schmelze S umhüllt bis hin zur Sumpfspitze Ss.The broad side walls 23 of the mold 21 are shown, at the mouth end of which a strand shell K has formed from the slab, which envelops the melt S up to the swamp tip S s .

Der Kokille 21 nachgeordnet sind die Strangführungsrollen 24.The strand guide rollers 24 are arranged downstream of the mold 21.

Die zugeführte Schmelze Ss dringt mit einer Geschwindigkeit vK in den sich in der Kokille befindlichen Sumpf SB ein und zwar in einer Tiefe T bezogen auf die Breitseiten 23. Danach besitzt der Sumpf eine Geschwindigkeit vB, die der Abzugsgeschwindigkeit der Bramme und damit auch der Strangschale K entspricht. The supplied melt S s penetrates into the swamp S B located in the mold at a speed v K, namely at a depth T with respect to the broad sides 23. Then the swamp has a speed v B which corresponds to the slab withdrawal speed and thus also corresponds to the strand shell K.

PositionslistePosition list SchmelzenzufuhrMelt supply

1111
VorratsbehälterStorage container
1212th
TauchausgußDiving spout
1313
Rohrförmiger TeilTubular part
1414
Spatenförmiger TeilSpade-shaped part
1515
Drosselthrottle
1616
Schmalseiten TauchausgußNarrow side immersion spout
1717th
Breitseiten TauchausgußBroadside diving spout
StranggießeinrichtungContinuous caster

2121
KokilleMold
2222
KokillenschmalseiteMold narrow side
2323
KokillenbreitseiteMold broadside
2424th
StrangführungsrollenStrand guide rollers
ll
MittenachseCenter axis
KK
StrangschaleStrand shell
pp
Pegellevel
ss
Schmelzemelt
Sz S z
SchmelzenzufuhrMelt supply
SB S B
Sumpfswamp
Ss S s
SumpfspitzeSwamp tip
TT
Eindringtiefe Schmelze SchmalseiteDepth of penetration melt narrow side
TT T T
Tauchtiefe TauchausgußDiving depth diving spout
LL
Eindringtiefe Schmelze BreitseiteDeep penetration melt broadside
vK v K
Strömungsgeschwindigkeit SchmelzenzufuhrFlow rate melt feed
VB V B
Strömungsgeschwindigkeit SumpfSwamp flow rate
αα
ÖffnungswinkelOpening angle
aa
Freier Querschnitt Mündung TauchausgußFree cross-section of the immersion nozzle
AA
Innenquerschnitt KokilleInternal cross section of mold
dd
Lichte Weite GießteilClear width casting
DD
Lichte Weite SchmalseitenkokilleClear width narrow side mold

Claims (6)

  1. Process for the production of slabs, with thickness D of > 100 mm at casting speeds v of < 3 m per minute, in a continuous casting plant, in which plant a molten mass is fed to a mould (21) from a reservoir (11) through a submerged nozzle (12), and in which plant a strand shell surrounding a crater is drawn off at the outlet side into a strand guide frame, in particular of a curved mould continuous casting machine,
    characterised by the fact that
    the molten mass enters the mould (21) at a speed (vK), which is in the ratio of vK : vB = 6:1 1 to 60 : 1
    to the strand offtake speed (vB), and
    that the molten mass is fed in in such a way that it penetrates the crater at a length L < 2 m along a broad front in relation to the melt level, its cross-section forming a rectangular profile.
  2. Process as in Claim 1,
    characterised by the fact that
    the liquid molten mass penetrates the crater with an entry profile in the form of a rectangle, the internal width (d) of the rectangle being in the ratio of
    d : = 1 : 3 to 1: 40
    to the narrow face of the mould (D),
    and the width (b) of the rectangle being in the ratio b : B = 1:7 to 1:1.2
    to the broad face of the mould (B).
  3. Process as in Claim 1 or 2,
    characterised by the fact that
    the molten mass fed to the narrow faces (D) of the mould flows into the crater at an angle (α) of α = 15 - 30° in relation to the direction of slab offtake.
  4. Process as in one of the preceding Claims,
    characterised by the fact that
    the liquid molten mass fed in through the submerged nozzle strikes the crater at a depth (T) of
    T = 0.1 to 1.5 × D.
  5. Continuous casting device for the production of slabs to be manufactured in accordance with process Claim 1, having a reservoir (11) from which the molten mass is fed, through a submerged nozzle (12), into a mould (21) which has an internal width (D) where D > 100 mm; this submerged nozzle (12) has at least one pourer which is elongated in section, incorporating a throttle element (15), which reduces both the speed and the flow profile of the main flow of the molten mass as it enters the pourer,
    characterised by the fact that
    the pourer with its elongated profile is shaped in such a way that the narrow sides (22) form an angle α = 15 - 30° with the central axis, opening out in the direction of flow.
  6. Continuous casting device as in Claim 5,
    characterised by the fact that
    the open cross-section (a) of the opening of the pourer of the submerged nozzle (12) is in the ratio of
    a : A = 1:30 to 1:300
    to the internal cross-section A of the mould,
    the internal width (d) of the pourer of the submerged nozzle (12) being in the ratio of d : D = 1:2 to 1:40 to the narrow face (D) of the mould.
EP98934867A 1997-06-03 1998-06-03 Method and device for producing slabs Expired - Lifetime EP0996513B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19724232A DE19724232C2 (en) 1997-06-03 1997-06-03 Method and device for producing slabs
DE19724232 1997-06-03
PCT/DE1998/001544 WO1998055250A1 (en) 1997-06-03 1998-06-03 Method and device for producing slabs

Publications (2)

Publication Number Publication Date
EP0996513A1 EP0996513A1 (en) 2000-05-03
EP0996513B1 true EP0996513B1 (en) 2001-10-17

Family

ID=7831904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98934867A Expired - Lifetime EP0996513B1 (en) 1997-06-03 1998-06-03 Method and device for producing slabs

Country Status (19)

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US (1) US6626229B2 (en)
EP (1) EP0996513B1 (en)
JP (1) JP4542631B2 (en)
KR (1) KR100585413B1 (en)
AT (1) ATE206971T1 (en)
AU (1) AU8433298A (en)
BR (1) BR9810422A (en)
CA (1) CA2292473A1 (en)
CZ (1) CZ9904328A3 (en)
DE (2) DE19724232C2 (en)
DK (1) DK0996513T3 (en)
ES (1) ES2162461T3 (en)
HU (1) HU221712B1 (en)
PL (1) PL337129A1 (en)
SK (1) SK166399A3 (en)
TR (1) TR199903016T2 (en)
TW (1) TW404867B (en)
UA (1) UA51790C2 (en)
WO (1) WO1998055250A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT408962B (en) * 2000-05-31 2002-04-25 Voest Alpine Ind Anlagen METHOD FOR PRODUCING A CONTINUOUS PRE-PRODUCT
AT507590A1 (en) † 2008-11-20 2010-06-15 Siemens Vai Metals Tech Gmbh METHOD AND CONTINUOUS CASTING SYSTEM FOR MANUFACTURING THICK BRAMMS
SI2100676T1 (en) * 2008-12-17 2012-10-30 Peter Kovac Continuous cast method
EP3154726B1 (en) * 2014-06-11 2018-08-15 Arvedi Steel Engineering S.p.A. Thin slab nozzle for distributing high mass flow rates
CN110695349B (en) * 2019-11-21 2024-03-12 辽宁科技大学 CSP sheet billet continuous casting high-pulling-speed submerged nozzle and manufacturing method thereof

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2105881B2 (en) * 1971-02-01 1974-04-04 Mannesmann Ag, 4000 Duesseldorf Device and method for introducing a melt into a continuous casting mold
AT331437B (en) * 1973-06-14 1976-08-25 Voest Ag CONTINUOUS STEEL CASTING PROCESS AND DEVICE FOR ITS IMPLEMENTATION
US5205343A (en) * 1989-06-03 1993-04-27 Sms Schloemann-Siemag Aktiengesellschaft Pouring tube for feeding molten steel into a continuous casting mold
DE4142447C3 (en) * 1991-06-21 1999-09-09 Mannesmann Ag Immersion nozzle - thin slab
DE4320723A1 (en) * 1993-06-23 1995-01-05 Didier Werke Ag Immersion spout
US5785880A (en) * 1994-03-31 1998-07-28 Vesuvius Usa Submerged entry nozzle
IT1267284B1 (en) * 1994-08-08 1997-01-28 Danieli Off Mecc CONTINUOUS CASTING UNLOADER
IT1267299B1 (en) * 1994-09-30 1997-01-28 Danieli Off Mecc UNLOADER FOR CRYSTALLIZER FOR CONTINUOUS CASTING OF THIN Slabs
DE19512208C1 (en) * 1995-03-21 1996-07-18 Mannesmann Ag Immersed spout for pouring metal
EP0798061A4 (en) * 1995-10-18 1999-06-30 Sumitomo Metal Ind Method for controlling the level of molten metal for a continuous casting machine
DE19623787C2 (en) * 1996-06-04 1998-07-02 Mannesmann Ag Method and device for pouring steel from a dip spout
IT1284035B1 (en) * 1996-06-19 1998-05-08 Giovanni Arvedi DIVER FOR CONTINUOUS CASTING OF THIN SLABS

Also Published As

Publication number Publication date
EP0996513A1 (en) 2000-05-03
TR199903016T2 (en) 2000-07-21
HU221712B1 (en) 2002-12-28
WO1998055250A1 (en) 1998-12-10
UA51790C2 (en) 2002-12-16
CZ9904328A3 (en) 2002-03-13
TW404867B (en) 2000-09-11
DE19724232A1 (en) 1998-12-24
US20030150588A1 (en) 2003-08-14
CA2292473A1 (en) 1998-12-10
US6626229B2 (en) 2003-09-30
DE19724232C2 (en) 1999-04-15
KR20010013247A (en) 2001-02-26
AU8433298A (en) 1998-12-21
PL337129A1 (en) 2000-07-31
DK0996513T3 (en) 2001-11-19
HUP0004067A3 (en) 2001-05-28
SK166399A3 (en) 2000-07-11
KR100585413B1 (en) 2006-06-02
HUP0004067A1 (en) 2001-03-28
ES2162461T3 (en) 2001-12-16
ATE206971T1 (en) 2001-11-15
JP4542631B2 (en) 2010-09-15
DE59801802D1 (en) 2001-11-22
JP2002501438A (en) 2002-01-15
BR9810422A (en) 2000-07-25

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