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EP2406024B1 - Casting nozzle for a horizontal continuous casting system - Google Patents

Casting nozzle for a horizontal continuous casting system Download PDF

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Publication number
EP2406024B1
EP2406024B1 EP10711534A EP10711534A EP2406024B1 EP 2406024 B1 EP2406024 B1 EP 2406024B1 EP 10711534 A EP10711534 A EP 10711534A EP 10711534 A EP10711534 A EP 10711534A EP 2406024 B1 EP2406024 B1 EP 2406024B1
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EP
European Patent Office
Prior art keywords
casting nozzle
nozzle according
outflow
base
flow direction
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.)
Not-in-force
Application number
EP10711534A
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German (de)
French (fr)
Other versions
EP2406024A1 (en
Inventor
Hellfried Eichholz
Sven Klawiter
Rune SCHMIDT-JÜRGENSEN
Karl-Heinz Spitzer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Salzgitter Flachstahl GmbH
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Salzgitter Flachstahl GmbH
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Publication of EP2406024A1 publication Critical patent/EP2406024A1/en
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Classifications

    • 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
    • B22D11/0631—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a travelling straight surface, e.g. through-like moulds, a belt
    • 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
    • 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
    • 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 plant, in particular for the casting of steel strip. In such casting plants must be applied from the nozzle, which forms a pouring channel, the liquid steel on a cooled endless belt.
  • Such a casting nozzle is known from “ Direct Strip Casting (DSC) - Option for the Production of New Steel Grades "- steel research 74 (2003) no. 11/12 p. 724-731 ,
  • a web of refractory material projecting transversely to the flow direction is arranged in the direction of flow, first at the top and then at the bottom of the pouring nozzle channel. Both webs form a weir in order to be able to retain in the sense of the effect of a siphon possible small slag residues and oxides in the melt.
  • the transfer of the liquid steel on the cooled endless belt is slidably along a slope in the outlet area.
  • the object of the invention is to improve the known casting nozzle to the effect that the melt distributed evenly when hitting the endless belt in the transverse direction.
  • the casting nozzle according to the invention is characterized in that seen in the flow direction of the hollow cross-section of the hollow block in the outlet area is uniformly reduced towards the outlet and the end face of the bottom is formed to the surface of the endless belt in such a way that the melt is perpendicular to the endless belt.
  • the front side of the floor can be formed vertically or provided with an undercut.
  • the cross-sectional reduction is preferably carried out by reducing the clear height distance.
  • An increase in the floor compared to the ceiling has proven to be a favorable option.
  • the distance reduction can be realized particularly simply if it takes place linearly.
  • the desired effect is achieved without problems if the surface of the floor rises linearly as far as the outlet edge, viewed in the flow direction.
  • the hollow block can be made in one piece or in several parts of separate elements.
  • a multi-part of the hollow block may consist of separate floor element with a one-piece consisting of ceiling and two side walls hood or a separate ceiling element, a separate floor element and two separate side elements.
  • the rectangular or undercut arrangement of the end face of the bottom element of the casting nozzle with respect to the surface of the endless belt causes a better distribution of melt on the endless belt.
  • the outflowing melt thus almost hits perpendicular to the endless belt and generates an additional transverse pulse.
  • the height from the outlet edge to the endless belt should preferably be 30 mm.
  • the slope of the run-up slope of the floor element is linear, similar to a ramp.
  • the extent of the increase in the flow direction should be at least 30 mm, preferably it is> 50 mm.
  • the outlet edge is provided with a chamfer. This chamfer simultaneously reduces the wear on the highly stressed outlet edge.
  • the pouring nozzle according to the invention is explained in detail.
  • FIG. 1 shows in a longitudinal section and FIG. 2 It is designed as a narrow rectangular hollow block and consists in this embodiment together of a ceiling element 2, a bottom element 3 and two side elements 4, 5 (in FIG. FIG. 2 ). All these parts 2 - 5 are made of refractory material, preferably ceramic and form a horizontally lying rectangular channel. 6
  • the bottom element 3 has a web extending into the channel 6 and extending transversely to the flow direction, which forms a so-called lower weir 7.
  • the pouring nozzle 1 is connected upstream of an inlet channel 8, which is connected to a distributor, not shown here.
  • weirs 7, 10 act together like a siphon and are supposed to retain any slag residues and oxides still present in the melt.
  • Both weirs 7, 10 can be arranged both in the pouring nozzle 1 and in the inlet channel 8 or as shown here, the upper weir 10 in the inlet channel 8 and the lower weir 7 in the pouring nozzle. 1
  • the inlet channel 8 is surrounded by a frame 22 made of metal, which is tongue-like at the end to clamp the adjacent casting nozzle 1 can.
  • the surface of the bottom element 3 has a run-on bevel 11, the rise of which takes place linearly and which extends up to the outlet edge 12.
  • the spout is not provided with a bevel, but rather the end face 21 of the bottom element 3 is at right angles with respect to the surface of the endless belt 14.
  • the run-on slope 11, viewed in the direction of flow, has an extension 18 of at least 30 mm, preferably> 50 mm.
  • the beginning of the run-on slope 11 is provided in the immediate vicinity of the lower weir 7.
  • this is this provided with a chamfer 23.
  • the height 19 from the lower edge of the chamfer 23 to the surface of the endless belt 14 is preferably 30 mm.
  • the end face 21 of the bottom element 3 opposite the end face 26 of the ceiling element 2 has a projection 20.
  • FIG. 3 shows in a section C - C of FIG. 2 Another measure to distribute the outflowing melt 13 in the transverse direction uniformly on the endless belt 14.
  • the bottom element 3 in both edge regions of the projection (20) has a sloping in the flow direction inclined surface 24, 25.
  • the respective inclined surface 24, 25 forms a triangle whose one corner is formed by the beginning of the starting bevel 11, the second corner by the outlet edge 12 and the third corner by the end face of the respective side element 4, 5.
  • FIG. 3 The representation in FIG. 3 can also be seen how far the bottom element 3 projects from the ceiling element 2.
  • This supernatant 20 should be at least 10 mm in order to be able to act early on the outflowing melt.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Electrolytic Production Of Metals (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. 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 plant, in particular for the casting of steel strip. In such casting plants must be applied from the nozzle, which forms a pouring channel, the liquid steel on a cooled endless belt.

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 casting nozzle is known from " Direct Strip Casting (DSC) - 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 schmalen rechteckigen Kanal darstellt, der als Hohlblock mit Boden, Decke und zwei Seitenwänden ausgebildet ist.In this known arrangement of a distributor of liquid steel flows through a horizontal inlet channel into the casting nozzle, which is in cross-section enclosed by a refractory narrow rectangular channel formed as a hollow block with bottom, ceiling and two side walls.

Im Auslaufbereich ist in Fließrichtung gesehen zuerst an der Oberseite und nachfolgend an der Unterseite des Gießdüsenkanals ein quer zur Fließrichtung sich erstreckender in den Kanal hineinragender Steg aus Feuerfestmaterial angeordnet. Beide Stege bilden ein Wehr, um im Sinne der Wirkung eines Siphons mögliche kleine Schlackenreste und Oxide in der Schmelze zurück halten zu können. Die Übergabe des flüssigen Stahls auf das gekühlte Endlosband erfolgt gleitend entlang einer Schräge im Auslaufbereich.In the outlet region, a web of refractory material projecting transversely to the flow direction is arranged in the direction of flow, first at the top and then at the bottom of the pouring nozzle channel. Both webs form a weir in order to be able to retain in the sense of the effect of a siphon possible small slag residues and oxides in the melt. The transfer of the liquid steel on the cooled endless belt is slidably along a slope in the outlet area.

Im Austrittbereich der Gießdüse tritt aufgrund der Oberflächenspannung und des Massenstroms eine Kontraktion des Stahl-Stromes auf. Dieser Effekt führt zu einer ungleichmäßigen Verteilung der Schmelze in Querrichtung auf dem Endlosband und somit zu einer unzureichenden Kantenfüllung des gegossenen Stahlbandes.In the exit area of the casting nozzle, a contraction of the steel stream occurs due to the surface tension and the mass flow. This effect leads to an uneven distribution of the melt in the transverse direction on the endless belt and thus to an insufficient edge filling of the cast steel strip.

Aufgabe der Erfindung ist es, die bekannte Gießdüse dahingehend zu verbessern, dass die Schmelze sich beim Auftreffen auf dem Endlosband auch in Querrichtung gleichmäßiger verteilt.The object of the invention is to improve the known casting nozzle to the effect that the melt distributed evenly when hitting the endless belt in the transverse direction.

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

Die erfindungsgemäße Gießdüse ist dadurch gekennzeichnet, dass in Fließrichtung gesehen der lichte Querschnitt des Hohlblockes im Auslaufbereich sich gleichförmig in Richtung auf den Auslauf verringert und die Stirnseite des Bodens zur Oberfläche des Endlosbandes in der Weise ausgebildet ist, dass die Schmelze senkrecht auf das Endlosband trifft. Hierfür kann die Stirnseite des Bodens senkrecht ausgebildet oder mit einem Hinterschnitt versehen sein.The casting nozzle according to the invention is characterized in that seen in the flow direction of the hollow cross-section of the hollow block in the outlet area is uniformly reduced towards the outlet and the end face of the bottom is formed to the surface of the endless belt in such a way that the melt is perpendicular to the endless belt. For this purpose, the front side of the floor can be formed vertically or provided with an undercut.

Die durch den schrägen Verlauf auftretende Verringerung des lichten Querschnitts des Hohlblocks bis zu einem den erforderlichen Durchsatz noch sichernden Minimalwert am Auslauf führt zu einem Aufstauen der Schmelze, die den Schmelzenstrom entgegen der Wirkung der Oberflächenspannung auch in die Randbereiche drückt.The reduction in the clear cross section of the hollow block occurring due to the oblique course up to a minimum value at the outlet which still ensures the required throughput leads to damming of the melt, which also presses the melt stream against the surface tension in the edge regions.

Die Querschnittsverringerung erfolgt vorzugsweise durch eine Verringerung des lichten Höhenabstandes. Ein Anstieg des Bodens gegenüber der Decke hat sich als günstige Variante herausgestellt.The cross-sectional reduction is preferably carried out by reducing the clear height distance. An increase in the floor compared to the ceiling has proven to be a favorable option.

Besonders einfach lässt sich die Abstandsverringerung realisieren, wenn sie linear erfolgt. Problemlos wird der gewünschte Effekt dann erreicht, wenn die Oberfläche des Bodens in Fließrichtung gesehen linear bis zur Auslaufkante ansteigt.The distance reduction can be realized particularly simply if it takes place linearly. The desired effect is achieved without problems if the surface of the floor rises linearly as far as the outlet edge, viewed in the flow direction.

Der Hohlblock kann aus einem Stück hergestellt sein oder mehrteilig aus separaten Elementen. Im Falle einer Mehrteiligkeit kann der Hohlblock bestehen aus separatem Bodenelement mit einer einteiligen aus Decke und zwei Seitenwänden bestehenden Haube oder aus einem separaten Deckenelement, einem separaten Bodenelement und zwei separaten Seitenelementen.The hollow block can be made in one piece or in several parts of separate elements. In the case of a multi-part of the hollow block may consist of separate floor element with a one-piece consisting of ceiling and two side walls hood or a separate ceiling element, a separate floor element and two separate side elements.

Der Einfachheit halber ist in beiden Fällen nur das Bodenelement mit der erfindungsgemäßen Anlaufschräge versehen. Dies hat den Vorteil eines einfachen Wechsels, falls das Bodenelement schneller verschleißen sollte als das Deckenelement oder die Seitenelemente.For simplicity, in both cases, only the bottom element is provided with the run-on slope according to the invention. This has the advantage of a simple change, if the floor element should wear faster than the ceiling element or the side elements.

Auch die rechtwinklige oder hinterschnittene Anordnung der Stirnseite des Bodenelementes der Gießdüse in Bezug auf die Oberfläche des Endlosbandes bewirkt eine bessere Schmelzenverteilung auf dem Endlosband. Die auslaufende Schmelze trifft dadurch nahezu senkrecht auf das Endlosband und erzeugt einen zusätzlichen Querimpuls. Dabei sollte die Höhe von der Auslaufkante bis zum Endlosband vorzugsweise 30 mm betragen.Also, the rectangular or undercut arrangement of the end face of the bottom element of the casting nozzle with respect to the surface of the endless belt causes a better distribution of melt on the endless belt. The outflowing melt thus almost hits perpendicular to the endless belt and generates an additional transverse pulse. The height from the outlet edge to the endless belt should preferably be 30 mm.

Vorzugsweise ist der Anstieg der Anlaufschräge des Bodenelementes linear, ähnlich wie bei einer Rampe. Die Erstreckung des Anstiegs in Fließrichtung sollte mindestens 30 mm betragen, vorzugsweise liegt sie bei >50 mm.Preferably, the slope of the run-up slope of the floor element is linear, similar to a ramp. The extent of the increase in the flow direction should be at least 30 mm, preferably it is> 50 mm.

Für eine frühzeitige Beeinflussung der auslaufenden Schmelze im Hinblick auf eine gleichmäßige Verteilung in Querrichtung, beispielsweise durch Gasstrahlen oder Induktoren, ist es hilfreich, das Bodenelement in Fließrichtung gesehen gegenüber dem Deckenelement vorstehen zu lassen. Dieser Überstand sollte mindestens 10 mm betragen. Durch einen solchen Überstand ist es möglich, die auslaufende Schmelze schon im Gießdüsenbereich statt erst auf dem Endlosband zu beeinflussen.For an early influence of the outflowing melt with a view to a uniform distribution in the transverse direction, for example by gas jets or inductors, it is helpful to allow the floor element to protrude in the direction of flow relative to the ceiling element. This supernatant should be at least 10 mm. By such a supernatant, it is possible to influence the outflowing melt already in Gießdüsenbereich instead of only on the endless belt.

Für diesen Fall wird vorgeschlagen, die Randbereiche des Überstandes des Bodenelementes mit je einer in Fließrichtung gesehen abfallenden Schrägfläche zu versehen. Dies führt dazu, dass in Querrichtung gesehen der Schmelzenstrom zu den Randbereichen hin umgelenkt wird und so ebenfalls zu einer besseren Verteilung der Schmelze beiträgt.For this case, it is proposed to provide the edge regions of the supernatant of the bottom element, each with a sloping sloping surface seen in the flow direction. As a result, in the transverse direction, the melt flow is deflected towards the edge regions and thus also contributes to a better distribution of the melt.

Zur Vereinfachung der Herstellung des separaten Bodenelementes ist es von Vorteil, wenn die Auslaufkante mit einer Fase versehen ist. Diese Fase mindert gleichzeitig den Verschleiß an der hoch beanspruchten Auslaufkante.To simplify the production of the separate bottom element, it is advantageous if the outlet edge is provided with a chamfer. This chamfer simultaneously reduces the wear on the highly stressed outlet edge.

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

Es zeigen:

Figur 1
einen Längsschnitt entlang der Linie A - A in Figur 2,
Figur 2
einen Querschnitt entlang der Linie B - B in Figur 1,
Figur 3
einen Schnitt entlang der Linie C - C in Figur 2.
Show it:
FIG. 1
a longitudinal section along the line A - A in FIG. 2 .
FIG. 2
a cross section along the line B - B in FIG. 1 .
FIG. 3
a section along the line C - C in FIG. 2 ,

Figur 1 zeigt in einem Längsschnitt und Figur 2 in einem Querschnitt schematisch eine Ausführungsform der erfindungsgemäßen Gießdüse 1. Sie ist als schmaler rechteckiger Hohlblock ausgebildet und setzt sich bei diesem Ausführungsbeispiel zusammen aus einem Deckenelement 2, einem Bodenelement 3 und zwei Seitenelementen 4, 5 ( Figur 2 ). Alle genannten Teile 2 - 5 sind aus Feuerfestmaterial, vorzugsweise Keramik und bilden einen horizontal liegenden rechteckigen Kanal 6. FIG. 1 shows in a longitudinal section and FIG. 2 It is designed as a narrow rectangular hollow block and consists in this embodiment together of a ceiling element 2, a bottom element 3 and two side elements 4, 5 (in FIG. FIG. 2 ). All these parts 2 - 5 are made of refractory material, preferably ceramic and form a horizontally lying rectangular channel. 6

Wie aus dem Stand der Technik bekannt, weist das Bodenelement 3 einen in den Kanal 6 hineinragenden quer zur Fließrichtung sich erstreckenden Steg auf, der ein so genanntes unteres Wehr 7 bildet.As known from the prior art, the bottom element 3 has a web extending into the channel 6 and extending transversely to the flow direction, which forms a so-called lower weir 7.

Der Gießdüse 1 vorgeschaltet ist eine Zulaufrinne 8, die an einen hier nicht dargestellten Verteiler angeschlossen ist.The pouring nozzle 1 is connected upstream of an inlet channel 8, which is connected to a distributor, not shown here.

Bei der gezeigten Ausführungsform ist am Deckenelement 9 der Zulaufrinne 8 ein in den freien Querschnitt hinein ragender sich quer zur Fließrichtung erstreckender Steg angeordnet, der ein so genanntes oberes Wehr 10 bildet. Beide Wehre 7, 10 wirken zusammen wie ein Siphon und sollen gegebenenfalls sich noch in der Schmelze befindliche Schlackenreste und Oxide zurück halten.In the embodiment shown on the ceiling element 9 of the inlet channel 8 a projecting into the free cross-section extending transversely to the flow direction extending web is arranged, which forms a so-called upper weir 10. Both weirs 7, 10 act together like a siphon and are supposed to retain any slag residues and oxides still present in the melt.

Beide Wehre 7, 10 können sowohl in der Gießdüse 1 als auch in der Zulaufrinne 8 angeordnet sein oder wie hier dargestellt das obere Wehr 10 in der Zulaufrinne 8 und das untere Wehr 7 in der Gießdüse 1.Both weirs 7, 10 can be arranged both in the pouring nozzle 1 and in the inlet channel 8 or as shown here, the upper weir 10 in the inlet channel 8 and the lower weir 7 in the pouring nozzle. 1

Die Zulaufrinne 8 wird durch einen Rahmen 22 aus Metall umfasst, der am Ende zungenartig ausgebildet ist, um die angrenzende Gießdüse 1 klemmen zu können.The inlet channel 8 is surrounded by a frame 22 made of metal, which is tongue-like at the end to clamp the adjacent casting nozzle 1 can.

Erfindungsgemäß weist die Oberfläche des Bodenelementes 3 eine Anlaufschräge 11 auf, deren Anstieg linear erfolgt und die sich bis zur Auslaufkante 12 erstreckt. Damit die auslaufende Schmelze 13 nahezu senkrecht auf das Endlosband 14 trifft, ist im Unterschied zum Stand der Technik der Auslauf nicht mit einer Schräge versehen, sondern die Stirnseite 21 des Bodenelementes 3 steht rechtwinkelig in Bezug auf die Oberfläche des Endlosbandes 14.According to the invention, the surface of the bottom element 3 has a run-on bevel 11, the rise of which takes place linearly and which extends up to the outlet edge 12. In order that the outflowing melt 13 strikes the endless belt 14 almost perpendicularly, in contrast to the prior art, the spout is not provided with a bevel, but rather the end face 21 of the bottom element 3 is at right angles with respect to the surface of the endless belt 14.

Auf die Darstellung der Art der Kühlung des Endlosbandes 14 wurde hier verzichtet. Dargestellt ist nur die vordere Umlenkrolle 15 des Bandumlaufs, sowie die zwei Seitenbegrenzungen 16, 17 des Endlosbandes 14.On the representation of the type of cooling of the endless belt 14 has been omitted here. Shown is only the front pulley 15 of the belt circulation, and the two side boundaries 16, 17 of the endless belt 14th

Die Anlaufschräge 11 weist in Fließrichtung gesehen eine Erstreckung 18 von mindestens 30 mm, vorzugsweise >50 mm, auf.The run-on slope 11, viewed in the direction of flow, has an extension 18 of at least 30 mm, preferably> 50 mm.

In diesem Ausführungsbeispiel ist der Anfang der Anlaufschräge 11 in unmittelbarer Nähe des unteren Wehres 7 vorgesehen. Zur Minderung des Verschleißes der Auslaufkante 12 ist diese mit einer Fase 23 versehen. Zur Erzeugung eines gewissen Querimpulses auf die Schmelze beträgt die Höhe 19 von der unteren Kante der Fase 23 bis zur Oberfläche des Endlosbandes 14 vorzugsweise 30 mm.In this embodiment, the beginning of the run-on slope 11 is provided in the immediate vicinity of the lower weir 7. To reduce the wear of the outlet edge 12 is this provided with a chamfer 23. To produce a certain transverse momentum on the melt, the height 19 from the lower edge of the chamfer 23 to the surface of the endless belt 14 is preferably 30 mm.

Für eine frühzeitige Beeinflussung der aus der Gießdüse auslaufenden Schmelze im Hinblick auf eine gleichmäßige Verteilung in Querrichtung weist die Stirnseite 21 des Bodenelementes 3 gegenüber der Stirnseite 26 des Deckenelementes 2 einen Überstand 20 auf.For an early influencing of the pouring out of the pouring melt with a view to a uniform distribution in the transverse direction, the end face 21 of the bottom element 3 opposite the end face 26 of the ceiling element 2 has a projection 20.

Figur 3 zeigt in einem Schnitt C - C von Figur 2 eine weitere Maßnahme, um die auslaufende Schmelze 13 in Querrichtung gleichmäßiger auf dem Endlosband 14 zu verteilen. Dazu weist das Bodenelement 3 in beiden Randbereichen des Überstandes (20) eine in Fließrichtung abfallende Schrägfläche 24, 25 auf. FIG. 3 shows in a section C - C of FIG. 2 Another measure to distribute the outflowing melt 13 in the transverse direction uniformly on the endless belt 14. For this purpose, the bottom element 3 in both edge regions of the projection (20) has a sloping in the flow direction inclined surface 24, 25.

Dies führt dazu, dass Teile der auslaufenden Schmelze 13 in die Randbereiche umgelenkt und beschleunigt werden, wie die eingetragenen Pfeile dies kennzeichnen.As a result, parts of the outflowing melt 13 are deflected and accelerated into the edge regions, as the registered arrows indicate.

In der Projektion bildet die jeweilige Schrägfläche 24, 25 ein Dreieck, dessen eine Ecke durch den Beginn der Anlaufschräge 11, die zweite Ecke durch die Auslaufkante 12 und die dritte Ecke durch die Stirnseite des jeweiligen Seitenelementes 4, 5 gebildet wird.In the projection, the respective inclined surface 24, 25 forms a triangle whose one corner is formed by the beginning of the starting bevel 11, the second corner by the outlet edge 12 and the third corner by the end face of the respective side element 4, 5.

Der Darstellung in Figur 3 ist auch zu entnehmen, wie weit das Bodenelement 3 gegenüber dem Deckenelement 2 vorsteht. Dieser Überstand 20 sollte mindestens 10 mm betragen, um frühzeitig auf die auslaufende Schmelze einwirken zu können.The representation in FIG. 3 can also be seen how far the bottom element 3 projects from the ceiling element 2. This supernatant 20 should be at least 10 mm in order to be able to act early on the outflowing melt.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

Nr.No. Bezeichnungdescription 11 Gießdüsecasting nozzle 22 Deckenelement GießdüseCeiling element pouring nozzle 33 Bodenelement GießdüseFloor element pouring nozzle 44 Seitenelement GießdüseSide element pouring nozzle 55 Seitenelement GießdüseSide element pouring nozzle 66 Kanalchannel 77 unteres Wehrlower weir 88th Zulaufrinnefeed channel 99 Deckenelement ZulaufrinneCeiling element inflow channel 1010 oberes Wehrupper weir 1111 Anlaufschrägestarting slope 1212 Auslaufkantedischarge edge 1313 Schmelzenstrommelt flow 1414 Endlosbandendless belt 1515 vordere Umlenkrollefront pulley 1616 Seitenbegrenzungpage limit 1717 Seitenbegrenzungpage limit 1818 Erstreckung der AnlaufschrägeExtension of the run-up slope 1919 Höhe der AuslaufkanteHeight of the outlet edge 2020 Überstand Stirnseite Bodenelement zur Stirnseite DeckenelementOverhang Front side Floor element to the front side Ceiling element 2121 Stirnseite BodenelementFront side floor element 2222 Rahmenframe 2323 Fasechamfer 24, 2524, 25 Schrägflächesloping surface 2626 Stirnseite DeckenelementFront side ceiling element

Claims (11)

  1. A casting nozzle for a horizontal strip-casting installation, which is in the form of a narrow, rectangular hollow block, of refractory material, with a base, top and two lateral walls and whose outflow region is located only slightly above a cooled endless belt receiving the outflowing melt, characterised in that, viewed in the flow direction, the clear cross-section of the hollow block decreases uniformly in the outflow region in the direction of the outflow, wherein the base ascends in relation to the top and the front side (21) of the base of the hollow block is perpendicular to the surface of the endless band (14) or the front side (21) of the base of the hollow block has an undercut with respect to the surface of the endless band (14), so that the melt strikes the endless band in a perpendicular manner.
  2. A casting nozzle according to claim 1, characterised in that the base is in the form of a separate base element (3) and the top and the two lateral walls are in the form of a one-part, rectangular hood and, viewed in the flow direction, the inner surface of the base element (3) ascends in the outflow region linearly to the outflow edge (12).
  3. A casting nozzle according to claims 1 - 2, characterised in that the hollow block is formed from a separate base element (3), two separate lateral elements (4, 5) and a separate top element (2) and, viewed in the flow direction, the surface of the base element (3) ascends in the outflow region linearly to the outflow edge (12).
  4. A casting nozzle according to claim 1, characterised in that the extension of the ascent of the rising incline (11) in the flow direction is at least 30 mm.
  5. A casting nozzle according to claim 4, characterised in that the extension is >50 mm.
  6. A casting nozzle according to any one of claims 1 - 5, characterised in that viewed in the flow direction, the front side (21) of the base element (3) has a projection (20) with respect to the front side (26) of the top element (2).
  7. A casting nozzle according to claim 6, characterised in that the projection (20) is 10 mm.
  8. A casting nozzle according to claims 2 or 3, characterised in that in both edge regions of the outflow, the base element (3) has a respective inclined surface (24, 25) descending viewed in the flow direction.
  9. A casting nozzle according to claim 4, characterised in that the projection of the inclined surface (24, 25) forms a triangle whose one corner is formed by the beginning of the rising incline (11), the second corner by the outflow edge (12) and the third corner by the front side of the respective lateral element (4, 5).
  10. A casting nozzle according to any one of claims 1 - 9, characterised in that the base element (3) is provided with a chamfer (23) at the outflow edge (1).
  11. A casting nozzle according to claim 1 and 10, characterised in that the distance (19) from the lower edge of the chamfer (23) to the surface of the endless band (14) is preferably 30 mm.
EP10711534A 2009-03-12 2010-02-15 Casting nozzle for a horizontal continuous casting system Not-in-force EP2406024B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009012984A DE102009012984B4 (en) 2009-03-12 2009-03-12 Casting nozzle for a horizontal strip casting plant
PCT/DE2010/000213 WO2010102599A1 (en) 2009-03-12 2010-02-15 Casting nozzle for a horizontal continuous casting system

Publications (2)

Publication Number Publication Date
EP2406024A1 EP2406024A1 (en) 2012-01-18
EP2406024B1 true EP2406024B1 (en) 2012-12-26

Family

ID=42224481

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10711534A Not-in-force EP2406024B1 (en) 2009-03-12 2010-02-15 Casting nozzle for a horizontal continuous casting system

Country Status (10)

Country Link
US (1) US8408279B2 (en)
EP (1) EP2406024B1 (en)
KR (1) KR101666454B1 (en)
CN (1) CN102369071B (en)
AU (1) AU2010223680B2 (en)
DE (1) DE102009012984B4 (en)
RU (1) RU2518864C2 (en)
UA (1) UA105041C2 (en)
WO (1) WO2010102599A1 (en)
ZA (1) ZA201106209B (en)

Families Citing this family (5)

* 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
CN102974787A (en) * 2012-12-06 2013-03-20 广西南南铝箔有限责任公司 Horizontal casting and rolling machine lip
DE102015215961A1 (en) 2015-08-21 2017-02-23 Schaeffler Technologies AG & Co. KG Device for force simulation on an actuating element of a vehicle, preferably a pedal force simulator
DE102015114725B3 (en) * 2015-09-03 2016-12-08 Salzgitter Flachstahl Gmbh Melt feed system for a horizontal strip caster

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH633205A5 (en) * 1978-01-30 1982-11-30 Alusuisse DEVICE FOR FEEDING A METAL MELT IN BAND CASTING.
US4593742A (en) * 1982-04-28 1986-06-10 Hazelett Strip-Casting Corporation Apparatus for feeding and continuously casting molten metal with inert gas applied to the moving mold surfaces and to the entering metal
CA1208412A (en) * 1982-04-28 1986-07-29 Robert W. Hazelett Methods and apparatus for feeding and continuously casting molten metal with inert gas applied to the moving mold surfaces and to the entering metal
JPS59125244A (en) * 1982-12-28 1984-07-19 Sumitomo Metal Ind Ltd Gutter for water heater of twin belt continuous caster
EP0258469A1 (en) * 1986-08-29 1988-03-09 Fried. Krupp Gesellschaft mit beschränkter Haftung Device for belt casting of steel in a twin belt casting ingot mould
US6173755B1 (en) 1996-05-23 2001-01-16 Aluminum Company Of America Nozzle for continuous slab casting
US5804136A (en) * 1996-11-27 1998-09-08 Hazelett Strip-Casting Corporation Radial-flow distributor for wide uniform nonturbulent non-dribbling pouring of molten metal into a continuous metal-casting machine-methods and apparatus
FR2774930B1 (en) * 1998-02-13 2000-05-19 Pechiney Rhenalu STRIPS OF ALUMINUM ALLOY WITH HIGH SURFACE HOMOGENEITY AND METHOD OF MANUFACTURING SUCH STRIPS
US20060191664A1 (en) * 2005-02-25 2006-08-31 John Sulzer Method of and molten metal feeder for continuous casting
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

Also Published As

Publication number Publication date
EP2406024A1 (en) 2012-01-18
UA105041C2 (en) 2014-04-10
AU2010223680A1 (en) 2011-09-22
AU2010223680B2 (en) 2016-02-18
RU2011141295A (en) 2013-04-20
CN102369071A (en) 2012-03-07
KR20110126136A (en) 2011-11-22
CN102369071B (en) 2014-07-09
KR101666454B1 (en) 2016-10-14
US20120132389A1 (en) 2012-05-31
DE102009012984B4 (en) 2013-05-02
US8408279B2 (en) 2013-04-02
DE102009012984A1 (en) 2010-09-23
ZA201106209B (en) 2012-06-26
WO2010102599A1 (en) 2010-09-16
RU2518864C2 (en) 2014-06-10

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