EP2406025B1 - Casting nozzle for horizontal strip casting system - Google Patents

Casting nozzle for horizontal strip casting system Download PDF

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Publication number
EP2406025B1
EP2406025B1 EP10722536.9A EP10722536A EP2406025B1 EP 2406025 B1 EP2406025 B1 EP 2406025B1 EP 10722536 A EP10722536 A EP 10722536A EP 2406025 B1 EP2406025 B1 EP 2406025B1
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EP
European Patent Office
Prior art keywords
casting
segments
casting nozzle
hollow block
nozzle according
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EP10722536.9A
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German (de)
French (fr)
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EP2406025A1 (en
Inventor
Hellfried Eichholz
Sven Klawiter
Rune SCHMIDT-JÜRGENSEN
Karl-Heinz Spitzer
Hans-Jürgen HECKEN
Jochen SCHLÜTER
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SMS Group GmbH
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SMS Group GmbH
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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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/064—Accessories therefor for supplying molten metal
    • B22D11/0642—Nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/045—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for horizontal casting
    • 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 pouring nozzle for a horizontal strip casting installation, in particular for the casting of steel strip according to the preamble of claim 1.
  • the liquid steel must be applied to a cooled endless strip from the nozzle which forms a pouring channel.
  • Such a pouring nozzle is known from “ Direct Strip Casting "(DSC) - an option for the production of New Steel Grades” - steel research 74 (2003) No. 11/12 p. 724-731 ,
  • the liquid steel flows from a distributor via a horizontally lying feed channel into the pouring nozzle, which in cross section has a rectangular channel enclosed by refractory material.
  • the pouring nozzle is designed as a rectangular hollow block made of refractory material.
  • a so-called upper weir is arranged on the ceiling element and a so-called lower weir on the base element. Both weirs work together in the sense of a siphon to hold back the slag residues that remain in the melt.
  • a pouring nozzle for thin strip casting systems disclosed with a back dam, which rests on a support for the thin strip movable in the conveying direction and a front dam, which limits the casting gap to the carrier in the conveying direction.
  • a plurality of outflow openings for the melt lying side by side in the direction of the thin bandwidth are formed between the back and front dams.
  • casting nozzles which consist of several sub-elements with openings for the melt to exit ( GB 2013855 A1 . JP 58199649 ).
  • this relates to the static strength of the refractory material, in particular that of the ceiling element, which represents a support on two supports.
  • the ceiling element which represents a support on two supports.
  • there is great thermal expansion of the substructure during continuous operation which undesirably changes the clear cross section of the pouring nozzle.
  • the production of very wide pouring nozzles from refractory material also drives up costs in an unacceptable way.
  • the object of the invention is to be able to master casting widths> 300 mm with the proven casting nozzle, designed as a rectangular hollow block, with reasonable production costs.
  • the hollow block is divided at least once in the casting direction and a narrow sealing element is arranged at the separation point of the segments, the width of the remaining gaps in the separation point area being selected such that they are closed when the casting nozzle is operated.
  • the deflection that occurs when the pouring nozzle is operated is limited to individual shorter segments and is therefore manageable.
  • a sealing element is arranged between the segments for sealing at the separation points.
  • This is preferably a felt made of refractory material based on Al 2 O 3 , also known under the trade name "Pyrostop”. This material can withstand temperatures up to 1600 ° C. Depending on the thermal expansion of the refractory material used for the pouring nozzle, the thickness of the sealing element should be 1 - 2 mm.
  • the gaps remaining in the separation point areas when the individual segments are assembled are to be selected so that when the pouring nozzle is operated, they close due to the thermal expansion.
  • a disadvantage of the multi-part design of the pouring nozzle is the arrangement of a support web between the ceiling and floor element in the respective separation area, since this leads to the division of the steel flow.
  • the width of the support web should be as small as possible and preferably not exceed 10-20 mm.
  • the respective floor elements In order to facilitate the displacement of the segments transversely to the casting direction as a result of the thermal expansion, the respective floor elements have a step-like step corresponding to one another at the separation point.
  • the part opposing the pouring direction is designed as a clamping section. Both the width and the height are less than the front section.
  • both the top of the ceiling element and the underside of the bottom element of this clamping section is provided with a slope that increases against the casting direction.
  • the top of the ceiling element of the clamping section preferably adjoins the top of the ceiling element of the front section without a shoulder.
  • a modular design is proposed for such cases. It is characterized by a segment arranged on the right and left.
  • both segments will be designed identically for cost reasons.
  • the proposed multi-part design of the pouring nozzle has the advantage that the individual segments have the necessary static strength, can be produced more cost-effectively and enable a modular construction for different pouring widths.
  • the pouring nozzle according to the invention is explained in more detail.
  • Figure 1 and 5 are in two views, in Figure 2 in a top view, and in Figures 3 and 4 in two sections a split pouring nozzle according to the invention with the two segments 1.1, 1.2 shown.
  • Each segment 1.1, 1.2 is constructed in mirror image the same way, each with a ceiling element 2.1, 2.2, a floor element 3.1, 3.2 and a side element 4.1, 4.2. At the separation point 5 between the two segments 1.1, 1.2, a 1 - 2 mm thick sealing element 6 is arranged.
  • the respective floor element 3.1, 3.2 is provided at the separation point 5 with a corresponding step-like section 7.1, 7.2.
  • the limitation of the formation of the two segments 1.1, 1.2 with mirror image same refers to this step-like paragraph 7.1, 7.2.
  • the width of the gaps remaining in the separation point 5 during the assembly of the two segments 1.1, 1.2 are selected such that they close when the pouring nozzle is operated due to the thermal expansion.
  • each segment 1.1, 1.2 each has a front section 10.1, 10.2 and a clamping section 11.1, 11.2.
  • the details become the Figures 3 and 4 explained.
  • Figure 3 is a section along the line A - A in Figure 1 , This section shows on the one hand the channel 12.1 extending horizontally between the ceiling 2.1 and the floor element 3.1 and on the other hand the lower weir 8.1 arranged on the floor element 3.1.
  • the open arrow drawn in channel 12.1 indicates the pouring direction 13.
  • the section of the respective segment 1.1, 1.2 facing the pouring direction 13 is designed as a clamping section 11.1, 11.2.
  • the upper side of the ceiling element 2.1 in the clamping section 11.1 has a slope 14.1 which rises in the opposite direction to the casting direction 13.
  • the underside of the base element 3.1 in the clamping section 11.1 also has a slope 15.1 which rises in the opposite direction to the casting direction.
  • the slope angle of the two slopes is in the range ⁇ 5 °.
  • Figure 4 is a section along the line B - B in Figure 1 , In this section it can be seen that the side surfaces 16.1, 16.2 of the respective clamping section 11.1, 11.2 are straight. Reference should also be made to the double-conical design of the respective support webs 9.1, 9.2.
  • Such a design has the advantage that there is a streamlined course of the melt with at the same time sufficient rigidity of the support pillars.
  • Figure 6 shows in a same view as Figure 1 a four-part pouring nozzle, each with a segment 1.1, 1.2 on the edge and two middle segments 1.3, 1.4.
  • the two outer segments 1.1, 1.2 are constructed almost identically in mirror image and the two middle segments 1.3, 1.4 are identical. This makes it possible, depending on the desired casting width, to always use the two outer segments 1.1, 1.2 and to place either one or two middle segments 1.3, 1.4 in between and to choose the width of the middle or middle segments 1.3, 1.4 appropriately.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Description

Die Erfindung betrifft eine Gießdüse für eine horizontale Bandgießanlage, insbesondere für das Gießen von Stahlband gemäß dem Oberbegriff des Anspruchs 1. Bei derartigen Gießanlagen muss aus der Düse, die einen Gießkanal bildet, der flüssige Stahl auf ein gekühltes Endlosband aufgebracht werden.The invention relates to a pouring nozzle for a horizontal strip casting installation, in particular for the casting of steel strip according to the preamble of claim 1. In such casting installations, the liquid steel must be applied to a cooled endless strip from the nozzle which forms a pouring channel.

Eine solche Gießdüse ist bekannt aus " Direct Strip Casting" (DSC) - an Option for the Production of New Steel Grades" - steel research 74 (2003) No. 11/12 p. 724 - 731 .Such a pouring nozzle is known from " Direct Strip Casting "(DSC) - an option for the production of New Steel Grades" - steel research 74 (2003) No. 11/12 p. 724-731 ,

Bei dieser bekannten Anordnung fließt aus einem Verteiler der flüssige Stahl über eine horizontal liegende Zulaufrinne in die Gießdüse, die im Querschnitt einen von Feuerfestmaterial umschlossenen rechteckigen Kanal aufweist. Die Gießdüse ist als ein aus Feuerfestmaterial bestehender rechteckiger Hohlblock ausgebildet. Im Auslaufbereich der Gießdüse ist am Deckenelement ein sogenanntes oberes Wehr und am Bodenelement ein sogenanntes unteres Wehr angeordnet. Beide Wehre wirken im Sinne eines Siphons zusammen, um die in der Schmelze verbliebenen Schlackenreste zurück zu halten.In this known arrangement, the liquid steel flows from a distributor via a horizontally lying feed channel into the pouring nozzle, which in cross section has a rectangular channel enclosed by refractory material. The pouring nozzle is designed as a rectangular hollow block made of refractory material. In the outlet area of the pouring nozzle, a so-called upper weir is arranged on the ceiling element and a so-called lower weir on the base element. Both weirs work together in the sense of a siphon to hold back the slag residues that remain in the melt.

In der DE 196 36 697 C1 ist eine Gießdüse für Dünnbandgießanlagen offenbart mit einem Rückdamm, der auf einem in Förderrichtung bewegbaren Träger für das Dünnband aufliegt und einem Frontdamm, der in Förderrichtung den Gießspalt zum Träger begrenzt. Nach einer bevorzugten Ausführungsform sind zwischen Rück- und Frontdamm mehrere in Richtung der Dünnbandbreite nebeneinander liegende Ausströmöffnungen für die Schmelze ausgebildet.In the DE 196 36 697 C1 is a pouring nozzle for thin strip casting systems disclosed with a back dam, which rests on a support for the thin strip movable in the conveying direction and a front dam, which limits the casting gap to the carrier in the conveying direction. According to a preferred embodiment, a plurality of outflow openings for the melt lying side by side in the direction of the thin bandwidth are formed between the back and front dams.

Hierdurch soll sich über die Gießspaltbreite eine gleichmäßigere Verteilung der Schmelze ergeben. Die Bildung der Ausströmöffnungen soll durch eine entsprechende Formgebung des Rück- oder Frontdammes erreicht werden. Einzelheiten dazu sind nicht angegeben.This should result in a more even distribution of the melt over the width of the casting gap. The formation of the outflow openings should be achieved by appropriate shaping of the back or front dam. No details are given.

Bekannt sind auch Gießdüsen die aus mehreren Teilelementen mit Öffnungen zum Austritt der Schmelze bestehen ( GB 2013855 A1 , JP 58199649 ).Also known are casting nozzles which consist of several sub-elements with openings for the melt to exit ( GB 2013855 A1 . JP 58199649 ).

Aus wirtschaftlichen Gründen ist es wünschenswert möglichst breite Stahlbänder zu gießen. Bei einer Gießbreite von z. B. >300 mm treten jedoch die unterschiedlichsten Probleme beim Betreiben der Gießdüse auf.For economic reasons it is desirable to cast steel strips as wide as possible. With a casting width of z. B.> 300 mm, however, the most diverse problems occur when operating the pouring nozzle.

Zum Einen betrifft dies die statische Festigkeit des Feuerfestmaterials, insbesondere die des Deckenelements, das einen Träger auf zwei Stützen darstellt. Zum Anderen kommt es bei Dauerbetrieb zu großen thermischen Dehnungen des Unterbaus, die den lichten Querschnitt der Gießdüse in unerwünschter Weise verändern. Auch die Herstellung sehr breiter Gießdüsen aus Feuerfestmaterial treibt die Kosten in nicht mehr vertretbarer Weise nach oben.On the one hand, this relates to the static strength of the refractory material, in particular that of the ceiling element, which represents a support on two supports. On the other hand, there is great thermal expansion of the substructure during continuous operation, which undesirably changes the clear cross section of the pouring nozzle. The production of very wide pouring nozzles from refractory material also drives up costs in an unacceptable way.

Aufgabe der Erfindung ist es mit der bewährten Gießdüse, ausgebildet als rechteckiger Hohlblock, auch Gießbreiten > 300 mm beherrschen zu können bei vertretbaren Herstellungskosten.The object of the invention is to be able to master casting widths> 300 mm with the proven casting nozzle, designed as a rectangular hollow block, with reasonable production costs.

Diese Aufgabe wird ausgehend vom Oberbegriff des Hauptanspruchs mit den Merkmalen des kennzeichnenden Teils gelöst. Vorteilhafte Weiterbildungen sind Gegenstand von Unteransprüchen.This object is achieved on the basis of the preamble of the main claim with the features of the characterizing part. Advantageous further developments are the subject of dependent claims.

Erfindungsgemäß ist der Hohlblock mindestens einmal in Gießrichtung geteilt und an der Trennstelle der Segmente ist ein schmales Abdichtungselement angeordnet, wobei die verbleibenden Spalten im Trennstellenbereich in ihrer Breite so zu wählen sind, dass diese beim Betreiben der Gießdüse verschlossen sind.According to the invention, the hollow block is divided at least once in the casting direction and a narrow sealing element is arranged at the separation point of the segments, the width of the remaining gaps in the separation point area being selected such that they are closed when the casting nozzle is operated.

Die beim Betreiben der Gießdüse auftretende Durchbiegung wird auf einzelne kürzere Segmente begrenzt und ist dadurch beherrschbar.The deflection that occurs when the pouring nozzle is operated is limited to individual shorter segments and is therefore manageable.

Zur Abdichtung an den Trennstellen wird zwischen den Segmenten ein Dichtungselement angeordnet. Vorzugsweise ist dies ein Filz aus Feuerfestmaterial auf der Basis von Al2O3, auch unter dem Handelsnamen "Pyrostop" bekannt. Dieses Material kann Temperaturen bis 1600°C widerstehen. Je nach Wärmeausdehnung des verwendeten Feuerfestmaterials für die Gießdüse sollte die Dicke des Abdichtungselementes bei 1 - 2 mm liegen.A sealing element is arranged between the segments for sealing at the separation points. This is preferably a felt made of refractory material based on Al 2 O 3 , also known under the trade name "Pyrostop". This material can withstand temperatures up to 1600 ° C. Depending on the thermal expansion of the refractory material used for the pouring nozzle, the thickness of the sealing element should be 1 - 2 mm.

Die beim Zusammenbau der einzelnen Segmente verbleibenden Spalten in den Trennstellenbereichen sind so zu wählen, dass beim Betreiben der Gießdüse sich diese infolge der thermischen Dehnung schließen.The gaps remaining in the separation point areas when the individual segments are assembled are to be selected so that when the pouring nozzle is operated, they close due to the thermal expansion.

Ein Nachteil bei der mehrteiligen Ausführung der Gießdüse ist die Anordnung eines Stützstegs zwischen Decken- und Bodenelement im jeweiligen Trennstellenbereich, da dieser zur Teilung des Stahlstroms führt. Um ein Zusammenfließen im Auslaufbereich sicherzustellen, sollte die Breite des Stützsteges daher so gering wie möglich sein und vorzugsweise 10 - 20 mm nicht übersteigen.A disadvantage of the multi-part design of the pouring nozzle is the arrangement of a support web between the ceiling and floor element in the respective separation area, since this leads to the division of the steel flow. For a confluence in the outlet area ensure that the width of the support web should be as small as possible and preferably not exceed 10-20 mm.

Um die Verschiebung der Segmente quer zur Gießrichtung infolge der thermischen Dehnung zu erleichtern, weisen die jeweiligen Bodenelemente an der Trennstelle einen miteinander korrespondierenden treppenartigen Absatz auf.In order to facilitate the displacement of the segments transversely to the casting direction as a result of the thermal expansion, the respective floor elements have a step-like step corresponding to one another at the separation point.

Für eine formschlüssige Verbindung der Gießdüse mit dem Zuführkanal ist der der Gießrichtung entgegen stehende Teil als Klemmabschnitt ausgebildet. Sowohl die Breite als auch die Höhe sind geringer als der vordere Abschnitt.For a positive connection of the pouring nozzle to the feed channel, the part opposing the pouring direction is designed as a clamping section. Both the width and the height are less than the front section.

Darüber hinaus ist sowohl die Oberseite des Deckenelementes als auch die Unterseite des Bodenelementes dieses Klemmabschnittes mit einer gegen die Gießrichtung ansteigenden Schräge versehen. Vorzugsweise schließt die Oberseite des Deckenelementes des Klemmabschnitts absatzlos an die Oberseite des Deckenelementes des vorderen Abschnitts an.In addition, both the top of the ceiling element and the underside of the bottom element of this clamping section is provided with a slope that increases against the casting direction. The top of the ceiling element of the clamping section preferably adjoins the top of the ceiling element of the front section without a shoulder.

Bei großen Gießbreiten kann es vorteilhaft sein, nicht nur eine sondern mehrere Trennstellen vorzusehen. Für solche Fälle wird eine Modulbauweise vorgeschlagen. Sie ist gekennzeichnet durch ein rechts und links angeordnetes Segment.In the case of large casting widths, it can be advantageous to provide not just one but several separation points. A modular design is proposed for such cases. It is characterized by a segment arranged on the right and left.

Beide Segmente sind nahezu spiegelbildlich gleich ausgebildet. Die Einschränkung "nahezu" bezieht sich auf den treppenartigen Absatz. Das dazwischen angeordnete Segment kann je nach gewünschter Gießbreite entsprechend breiter oder schmaler gewählt werden.Both segments are almost identical in design. The limitation "almost" refers to the step-like heel. The segment between them can be chosen to be wider or narrower depending on the desired casting width.

Bei Anordnung von zwei Zwischensegmenten wird man aus Kostengründen beide Segmente identisch ausbilden.If two intermediate segments are arranged, both segments will be designed identically for cost reasons.

Die vorgeschlagene Mehrteiligkeit der Gießdüse hat den Vorteil, dass die einzelnen Segmente die notwendige statische Festigkeit aufweisen, kostengünstiger herstellbar sind und eine Modulbauweise für verschiedene Gießbreiten ermöglichen.The proposed multi-part design of the pouring nozzle has the advantage that the individual segments have the necessary static strength, can be produced more cost-effectively and enable a modular construction for different pouring widths.

In einem Ausführungsbeispiel wird die erfindungsgemäße Gießdüse näher erläutert.In one embodiment, the pouring nozzle according to the invention is explained in more detail.

Es zeigen:

Figur 1
eine Ansicht entgegen der Gießrichtung einer zweiteiligen Gießdüse,
Figur 2
eine Drautsicht von Figur 1,
Figur 3
einen Schnitt entlang A - A in Figur 1,
Figur 4
einen Schnitt entlang B - B in Figur 1,
Figur 5
eine Ansicht in Gießrichtung von Figur 1,
Figur 6
eine Ansicht entgegen der Gießrichtung einer vierteiligen Gießdüse.
Show it:
Figure 1
a view against the pouring direction of a two-part pouring nozzle,
Figure 2
a top view of Figure 1 .
Figure 3
a section along A - A in Figure 1 .
Figure 4
a section along B - B in Figure 1 .
Figure 5
a view in the casting direction of Figure 1 .
Figure 6
a view against the pouring direction of a four-part pouring nozzle.

In Figur 1 und 5 sind in zwei Ansichten, in Figur 2 in einer Draufsicht, und in Figur 3 und 4 in zwei Schnitten eine erfindungsgemäße geteilte Gießdüse mit den zwei Segmenten 1.1, 1.2 dargestellt.In Figure 1 and 5 are in two views, in Figure 2 in a top view, and in Figures 3 and 4 in two sections a split pouring nozzle according to the invention with the two segments 1.1, 1.2 shown.

Jedes Segment 1.1, 1.2 ist spiegelbildlich gleich aufgebaut mit je einem Deckenelement 2.1, 2.2, einem Bodenelement 3.1, 3.2 und einem Seitenelement 4.1, 4.2. An der Trennstelle 5 zwischen den beiden Segmenten 1.1, 1.2 ist ein 1 - 2 mm dickes Abdichtungselement 6 angeordnet.Each segment 1.1, 1.2 is constructed in mirror image the same way, each with a ceiling element 2.1, 2.2, a floor element 3.1, 3.2 and a side element 4.1, 4.2. At the separation point 5 between the two segments 1.1, 1.2, a 1 - 2 mm thick sealing element 6 is arranged.

Zur besseren Führung bei der Gleitbewegung der beiden Segmente 1.1, 1.2 quer zur Gießrichtung 13 ( Figur 3, Figur 4 ) ist das jeweilige Bodenelement 3.1, 3.2 an der Trennstelle 5 mit einem korrespondierenden treppenartigen Absatz 7.1, 7.2 versehen. Die Einschränkung der Ausbildung der beiden Segmente 1.1, 1.2 mit spiegelbildlich gleich bezieht sich auf diesen treppenartigen Absatz 7.1, 7.2.For better guidance during the sliding movement of the two segments 1.1, 1.2 transverse to the casting direction 13 ( Figure 3 , Figure 4 ) the respective floor element 3.1, 3.2 is provided at the separation point 5 with a corresponding step-like section 7.1, 7.2. The limitation of the formation of the two segments 1.1, 1.2 with mirror image same refers to this step-like paragraph 7.1, 7.2.

Die bei der Montage der beiden Segmente 1.1, 1.2 verbleibenden Spalten in der Trennstelle 5 sind in ihrer Breite so gewählt, dass sie sich beim Betreiben der Gießdüse infolge der thermischen Ausdehnung schließen.The width of the gaps remaining in the separation point 5 during the assembly of the two segments 1.1, 1.2 are selected such that they close when the pouring nozzle is operated due to the thermal expansion.

In der hier gezeigten Ansicht der Figur 1 ist die Vorderseite des jeweiligen am Bodenelement 3.1, 3.2. angeordneten unteren Wehrs 8.1, 8.2 zu erkennen. In Figur 3 sind die Einzelheiten dazu dargestellt.In the view of the Figure 1 is the front of the respective on the floor element 3.1, 3.2. arranged lower weir 8.1, 8.2 to recognize. In Figure 3 the details are shown.

Um das jeweilige Deckenelement 2.1, 2.2 gegen das Bodenelement 3.1, 3.2 im Trennstellenbereich abstützen zu können, ist jeweils ein Stützsteg 9.1, 9.2 angeordnet. Einzelheiten gehen aus Figur 4 hervor.In order to be able to support the respective ceiling element 2.1, 2.2 against the floor element 3.1, 3.2 in the separation point area, a support web 9.1, 9.2 is arranged in each case. Details go out Figure 4 out.

In der Draufsicht gemäß Figur 2 ist zu erkennen, dass jedes Segment 1.1, 1.2 jeweils einen vorderen Abschnitt 10.1, 10.2 und einen Klemmabschnitt 11.1, 11.2 aufweist. Die Einzelheiten dazu werden zu den Figuren 3 und 4 erläutert.According to the top view Figure 2 it can be seen that each segment 1.1, 1.2 each has a front section 10.1, 10.2 and a clamping section 11.1, 11.2. The details become the Figures 3 and 4 explained.

Figur 3 ist ein Schnitt entlang der Linie A - A in Figur 1 . In diesem Schnitt ist zum Einen der zwischen Decken- 2.1 und Bodenelement 3.1 sich horizontal erstreckende Kanal 12.1 und zum Anderen das am Bodenelement 3.1 angeordnete untere Wehr 8.1 zu erkennen. Der im Kanal 12.1 eingezeichnete offene Pfeil gibt die Gießrichtung 13 an. Figure 3 is a section along the line A - A in Figure 1 , This section shows on the one hand the channel 12.1 extending horizontally between the ceiling 2.1 and the floor element 3.1 and on the other hand the lower weir 8.1 arranged on the floor element 3.1. The open arrow drawn in channel 12.1 indicates the pouring direction 13.

Zur formschlüssigen Verbindung der Gießdüse mit dem hier nicht dargestellten Zuführkanal ist der der Gießrichtung 13 entgegen gewandte Abschnitt des jeweiligen Segmentes 1.1, 1.2 als Klemmabschnitt 11.1, 11.2 ausgebildet. Dazu weist die Oberseite des Deckenelements 2.1 im Klemmabschnitt 11.1 eine entgegen der Gießrichtung 13 ansteigende Schräge 14.1 auf. Ebenso weist auch die Unterseite des Bodenelementes 3.1 im Klemmabschnitt 11.1 eine entgegen der Gießrichtung ansteigende Schräge 15.1 auf. Der Steigungswinkel der beiden Schrägen liegt im Bereich ≥5°.For the positive connection of the pouring nozzle to the feed channel (not shown here), the section of the respective segment 1.1, 1.2 facing the pouring direction 13 is designed as a clamping section 11.1, 11.2. For this purpose, the upper side of the ceiling element 2.1 in the clamping section 11.1 has a slope 14.1 which rises in the opposite direction to the casting direction 13. Likewise, the underside of the base element 3.1 in the clamping section 11.1 also has a slope 15.1 which rises in the opposite direction to the casting direction. The slope angle of the two slopes is in the range ≥5 °.

Figur 4 ist ein Schnitt entlang der Linie B - B in Figur 1 . In diesem Schnitt kann man erkennen, dass die Seitenflächen 16.1, 16.2 des jeweiligen Klemmabschnittes 11.1, 11.2 gerade ausgebildet sind. Hinzuweisen ist auch auf die doppelkonische Ausbildung der jeweiligen Stützstege 9.1, 9.2. Figure 4 is a section along the line B - B in Figure 1 , In this section it can be seen that the side surfaces 16.1, 16.2 of the respective clamping section 11.1, 11.2 are straight. Reference should also be made to the double-conical design of the respective support webs 9.1, 9.2.

Eine solche Ausbildung hat den Vorteil, dass sich ein strömungsgünstiger Verlauf der Schmelze bei gleichzeitig hinreichender Steifigkeit der Stützpfeiler ergibt.Such a design has the advantage that there is a streamlined course of the melt with at the same time sufficient rigidity of the support pillars.

Bei der in Figur 5 dargestellten Ansicht in Gießrichtung kann man erkennen, dass der Klemmabschnitt 11.1, 11.2 sowohl in der Höhe als auch in der Breite kleiner ist als der jeweils vordere Abschnitt 10.1, 10.2. Zu sehen ist auch die Rückseite des unteren Wehres 8.1, 8.2. Die Stützstege 9.1, 9.2 weisen im Vergleich zu Figur 1 eine größere Höhe auf, weil sie sich bis an die Oberseite des jeweiligen Bodenelementes 3.1, 3.2 erstrecken.At the in Figure 5 The view shown in the casting direction can be seen that the clamping section 11.1, 11.2 is smaller both in height and in width than the respective front section 10.1, 10.2. You can also see the back of the lower weir 8.1, 8.2. The support webs 9.1, 9.2 in comparison Figure 1 a greater height because they extend to the top of the respective floor element 3.1, 3.2.

Figur 6 zeigt in einer gleichen Ansicht wie Figur 1 eine vierteilige Gießdüse mit je einem Segment 1.1, 1.2 am Rand und zwei mittleren Segmenten 1.3, 1.4. Wie schon zu Figur 1 erwähnt sind im Sinne einer Modulbauweise die beiden äußeren Segmente 1.1, 1.2 spiegelbildlich nahezu gleich aufgebaut und die beiden mittleren Segmente 1.3, 1.4 identisch ausgebildet. Das ermöglicht es, je nach gewünschter Gießbreite die beiden äußeren Segmente 1.1, 1.2 immer zu verwenden und entweder ein oder zwei mittlere Segmente 1.3, 1.4 dazwischen zu setzen und die Breite des mittleren bzw. der mittleren Segmente 1.3, 1.4 passend zu wählen. Bezugszeichenliste Nr. Bezeichnung 1.1, 1.2, 1.3, 1.4 Segment der Gießdüse 2.1, 2.2, 2.3, 2.4 Deckenelement 3.1, 3.2, 3.3, 3.4 Bodenelement 4.1, 4.2 Seitenelement 5 Trennstelle 6 Abdichtungselement 7.1, 7.2 treppenartiger Absatz 8.1, 8.2 unteres Wehr 9.1, 9.2 Stützsteg 10.1, 10.2, 10.3, 10.4 vorderer Abschnitt 11.1, 11.2, 11.3, 11.4 Klemmabschnitt 12.1, 12.2 Kanal 13 Gießrichtung 14.1 Oberseite Schräge 15.1 Unterseite Schräge 16.1, 16.2 Seitenfläche Klemmabschnitt Figure 6 shows in a same view as Figure 1 a four-part pouring nozzle, each with a segment 1.1, 1.2 on the edge and two middle segments 1.3, 1.4. How about Figure 1 mentioned in the sense of a modular construction, the two outer segments 1.1, 1.2 are constructed almost identically in mirror image and the two middle segments 1.3, 1.4 are identical. This makes it possible, depending on the desired casting width, to always use the two outer segments 1.1, 1.2 and to place either one or two middle segments 1.3, 1.4 in between and to choose the width of the middle or middle segments 1.3, 1.4 appropriately. <B> LIST OF REFERENCES </ b> No. description 1.1, 1.2, 1.3, 1.4 Segment of the pouring nozzle 2.1, 2.2, 2.3, 2.4 ceiling element 3.1, 3.2, 3.3, 3.4 floor element 4.1, 4.2 page element 5 separation point 6 sealing element 7.1, 7.2 stair-like heel 8.1, 8.2 lower weir 9.1, 9.2 supporting web 10.1, 10.2, 10.3, 10.4 front section 11.1, 11.2, 11.3, 11.4 clamping section 12.1, 12.2 channel 13 casting 14.1 Top slope 15.1 Bottom slant 16.1, 16.2 Side surface clamping section

Claims (7)

  1. A casting nozzle for a horizontal strip casting plant, in particular for casting steel strip, which is designed connected to a supply channel as a rectangular hollow block consisting of refractory material, the runout region of which is located only a little way above a cooled endless belt which receives the melt running out, the hollow block being divided at least once in the casting direction,
    characterised in that
    at the separating point (5) of the segments (1.1 - 1.4) there is arranged as sealing element (6) a felt of refractory material based on Al2O3, the thickness of which is 1 - 2 mm, and the remaining gaps in the separating-point region are to be selected in their width such that they are closed when the casting nozzle is operated, wherein the bottom elements (3.1 - 3.4) of the hollow block which abut each other at the separating point (5) in cross-section transversely to the casting direction have a corresponding step-like shoulder (7.1, 7.2) which correspond with each other.
  2. A casting nozzle according to Claim 1,
    characterised in that
    a supporting crosspiece (9.1, 9.2) which connects the top element (2.1 - 2.4) to the bottom element (3.1 - 3.4) is arranged next to the separating point (5).
  3. A casting nozzle according to Claim 2,
    characterised in that
    in the cross-section lying in the casting direction (13) the face of the respective supporting crosspiece (9.1, 9.2) facing the channel (12.1 - 12.4) is designed in the form of a double cone.
  4. A casting nozzle according to one of Claims 1 - 3,
    characterised in that
    the hollow block counter to the casting direction (13) has a clamping portion (11.1 -11.4), the width of which lying transversely to the casting direction and the height of which are less than the front portion (10.1 - 10.4), with both the upper side of the top element (2.1) and the underside of the bottom element (3.1) of the clamping portion (11.1) having an incline (14.1, 15.1) which rises counter to the casting direction (13).
  5. A casting nozzle according to Claim 4,
    characterised in that
    the upper side of the top element (2.1) of the clamping portion (11.1) adjoins the upper side of the top element (2.1) of the front portion (10.1) of the casting nozzle without a shoulder.
  6. A casting nozzle according to one of Claims 1 - 5,
    characterised in that
    the hollow block has two separating points (5), the segments (1.2, 1.3) lying to the right and to the left being designed identically as mirror images and the width of the intermediate segment (1.4) being adapted to the desired casting width.
  7. A casting nozzle according to one of Claims 1 - 5,
    characterised in that
    the hollow block has three separating points (5), the segments (1.1, 1.2) lying to the right and to the left being designed identically as mirror images and the two middle segments (1.3, 1.4) being designed identically.
EP10722536.9A 2009-03-12 2010-02-15 Casting nozzle for horizontal strip casting system Active EP2406025B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009012985A DE102009012985A1 (en) 2009-03-12 2009-03-12 Casting nozzle for a horizontal strip casting plant
PCT/DE2010/000214 WO2010102600A1 (en) 2009-03-12 2010-02-15 Casting nozzle for a horizontal continuous casting system

Publications (2)

Publication Number Publication Date
EP2406025A1 EP2406025A1 (en) 2012-01-18
EP2406025B1 true EP2406025B1 (en) 2020-01-22

Family

ID=42320593

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10722536.9A Active EP2406025B1 (en) 2009-03-12 2010-02-15 Casting nozzle for horizontal strip casting system

Country Status (11)

Country Link
US (1) US8302663B2 (en)
EP (1) EP2406025B1 (en)
JP (1) JP5480306B2 (en)
KR (1) KR101662042B1 (en)
CN (1) CN102348520B (en)
AU (1) AU2010223681B2 (en)
BR (1) BRPI1009441B1 (en)
DE (1) DE102009012985A1 (en)
RU (1) RU2510305C2 (en)
UA (1) UA105380C2 (en)
WO (1) WO2010102600A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011010040B3 (en) 2011-02-02 2012-08-02 Salzgitter Flachstahl Gmbh Method and device for producing a cast strip of steel with material properties adjustable over the strip cross section and the strip length
DE102012013425A1 (en) 2012-07-03 2014-01-09 Salzgitter Flachstahl Gmbh Continuous strip casting and rolling plant
EP3548204B1 (en) * 2016-11-29 2020-04-08 SMS Group GmbH Casting nozzle
CN107817752B (en) * 2017-09-19 2024-01-30 芜湖安普机器人产业技术研究院有限公司 Automatic feeding device electrical control system for horizontal continuous casting of copper plate

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DE102005062854A1 (en) * 2005-12-23 2007-07-05 Salzgitter Flachstahl Gmbh Method and device for producing metallic hot strips, in particular made of lightweight steel
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Also Published As

Publication number Publication date
CN102348520A (en) 2012-02-08
BRPI1009441B1 (en) 2018-08-28
JP2012519595A (en) 2012-08-30
CN102348520B (en) 2014-04-16
KR101662042B1 (en) 2016-10-10
AU2010223681B2 (en) 2015-12-10
KR20110126135A (en) 2011-11-22
EP2406025A1 (en) 2012-01-18
UA105380C2 (en) 2014-05-12
RU2510305C2 (en) 2014-03-27
BRPI1009441A2 (en) 2016-03-01
DE102009012985A1 (en) 2010-09-23
US20120138257A1 (en) 2012-06-07
WO2010102600A1 (en) 2010-09-16
JP5480306B2 (en) 2014-04-23
RU2011141293A (en) 2013-04-20
AU2010223681A1 (en) 2011-09-22
US8302663B2 (en) 2012-11-06

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