EP2355946A1 - Immersion nozzle - Google Patents

Immersion nozzle

Info

Publication number
EP2355946A1
EP2355946A1 EP09744083A EP09744083A EP2355946A1 EP 2355946 A1 EP2355946 A1 EP 2355946A1 EP 09744083 A EP09744083 A EP 09744083A EP 09744083 A EP09744083 A EP 09744083A EP 2355946 A1 EP2355946 A1 EP 2355946A1
Authority
EP
European Patent Office
Prior art keywords
chamber
immersion nozzle
gas bubbles
molten metal
tubular body
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.)
Granted
Application number
EP09744083A
Other languages
German (de)
French (fr)
Other versions
EP2355946B1 (en
Inventor
Gernot Hackl
Gerald Nitzl
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.)
Refractory Intellectual Property GmbH and Co KG
Original Assignee
Refractory Intellectual Property GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Refractory Intellectual Property GmbH and Co KG filed Critical Refractory Intellectual Property GmbH and Co KG
Publication of EP2355946A1 publication Critical patent/EP2355946A1/en
Application granted granted Critical
Publication of EP2355946B1 publication Critical patent/EP2355946B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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 diving spout, as used for example in the continuous casting of a molten metal.
  • the immersion nozzle comprises a tubular body and a pouring passage extending from a first end portion of the tubular body at which a molten metal enters the pouring passage to a second end portion at which the molten metal leaves the pouring passage via at least one exit port. It can be seen from the document that immersion nozzles with two diametrically opposite lateral outlet openings also belong to the state of the art, so that the melt is laterally deflected from an initially purely vertical flow direction in two directions before it emerges from the immersion tube.
  • a disadvantage of this process technology is that partly gas bubbles of considerable size arise and are conducted with the melt stream into the metallurgical melt pool.
  • Such gas bubbles can have a diameter of several millimeters, but in some cases also diameters in the centimeter range.
  • the pouring mirror (the surface of the molten bath) may vary, especially in the border region to the dip tube
  • ascending gas bubbles can break up a slag layer resting on the molten bath and / or a casting powder layer. This can lead to undesirable contact of the melt with ambient air. Also, foundry slag can be drawn into the melt.
  • the described formation of gas bubbles, even larger gas bubbles, can not be prevented in principle, on the contrary: it is metallurgically necessary for certain applications.
  • the inventive concept is to make the existing gas bubbles harmless as possible.
  • the invention is based on the consideration to provide a way to remove the gas bubbles from the melt stream before the molten metal is passed from the dip tube into a molten bath of a metallurgical melting vessel.
  • the invention makes use of the fact that gas bubbles rise (float) within a molten metal.
  • the tendency of the gas bubbles to rise is greater, the larger the gas bubbles are and the lower the viscosity of the molten metal. This means that in particular the unwanted large gas bubbles with a diameter of »1 mm can be removed from the melt more easily than small gas bubbles.
  • the concrete concept of the invention consists in providing a chamber from the dip tube immediately before leaving the melt, into which such gas bubbles can rise (escape).
  • the chamber acts as a collecting container or buffer vessel for the said gas bubbles before they enter the molten bath (in the mold).
  • Further considerations of the inventions go to either return this gas / gas bubbles in the melt stream within the dip tube, in such a way that when the gas bubbles are introduced into the melt stream, the gas bubbles are crushed and thus rendered largely harmless, or in an alternative embodiment remove the gas from the system, ie into the ambient atmosphere.
  • the invention accordingly relates to a submersible nozzle with the following features:
  • 1.2 a pouring passage extending from a first end portion of the tubular body at which a molten metal enters the pouring passage to a second end portion at which the molten metal leaves the pouring passage via at least one exit port
  • a diving nozzle with the features 1.1 and 1.2 belongs to the prior art, which is now optimized by the structural design according to feature 1.3.
  • EP 1 036 613 B l is known, the melt in the pouring passage initially runs vertically from top to bottom, before they split and under a Angle of approximately 60 ° is led away from the immersion nozzle by two diametrically opposite lateral outlet openings.
  • the invention now provides, at the second end portion of the immersion nozzle to provide a chamber which is in fluid communication with the pouring channel, so that gas bubbles, which are carried along with the melt stream, can rise from the melt stream into the chamber and so from the part of the melt are removed, which flows into the metallurgical melting vessel or in its molten bath.
  • the chamber may extend from a portion of the pouring channel along which the molten metal flows at an angle> 0 and ⁇ 90 ° to the axial direction of the tubular body. If the flow conditions in the metallurgical vessel allow it, the angle can also be> 90 °, which enhances the tendency of gas bubble deposition.
  • the chamber can connect substantially radially outside to the pouring channel, so that the boundary wall of the pouring channel forms an inner wall of the chamber.
  • the collecting space for the gas may also run in an annular manner around the pouring channel or be spaced apart from one another by a plurality of chambers.
  • each chamber being associated with one of two melt streams at the outlet end.
  • the invention further provides to form the chamber at a distance from the first connection region with the pouring channel having at least one second connection region (an opening) to the pouring channel, so that the chamber receives a type of bypass function.
  • Gas bubbles which at the bottom of the chamber (viewed in the main flow direction of the melt) have risen up into the chamber, so at the upper end of the chamber, which is the end of the chamber, which faces the first end portion of the pouring channel again be returned to the pouring channel and thus into the melt stream. It has been found that when recycling the relatively large gas bubbles in the melt stream it comes to a crushing of the gas bubbles to a largely innocuous measure.
  • the gas is not removed from the system; but the gas bubbles are crushed and indeed to such a degree that they no longer cause the problems mentioned even after entering the molten bath in the metallurgical vessel. Rather, then the crushed gas bubbles can rise slowly, without turbulence and without destruction of slag and G manpulver Anlagen.
  • the chamber at a distance from its lower end, that is offset in the direction of the first end portion of the immersion nozzle, having an opening which creates a connection to the ambient atmosphere with a proper use of the immersion nozzle.
  • the pouring channel itself and its course, in particular in the second end section, towards the outlet opening or the outlet openings can be designed according to the prior art. It is advantageous if the pouring channel in the second section is designed so that the molten metal flows out of the outlet opening at an angle of> 0 and ⁇ 90 ° to the axial direction of the tubular body, because this calms the melt stream and the gas bubbles can still rise sufficiently upwards ,
  • Said flow angle can be limited to> 45 ° and ⁇ 75 ° according to another embodiment.
  • the immersion nozzle can be produced by conventional process techniques and using refractory materials, for example as cast or pressed part from an offset based on Al 2 O 3 , TiO 2 , ZrO 2 , MgO, CaO, etc.
  • the size of the chamber depends on the particular application.
  • the transition region (opening area) between the pouring channel and the chamber will have a cross-sectional area of 7-30 cm 2 and the chamber as a whole a volume of, for example, 50-250 cm 3 , starting from an immersion nozzle having a length of 900 mm and an outer diameter of 120 mm , a diameter of the pouring channel of 70 mm and a cross-sectional area of the outlet opening / s of about 50 cm 2 .
  • FIGS. 1 and 2 each show in schematic representation an outflow-side (second) end of a diving spout according to the invention, on the left in FIG. 1, while the prior art is compared on the right.
  • Figure 1 shows a submersible nozzle with a tubular body 10, a pouring channel 12 which extends substantially concentric to the axial center longitudinal axis L of the tubular body, from a first end portion 14 of the tubular body, in which a molten metal enters the pouring channel, to to a second End section 16, at which the molten metal leaves the pouring channel 12 via two lateral outlet openings 18.1, 18.2.
  • the pouring channel 12 in the region of the second end section 16 is designed such that the molten metal changes its originally purely vertical flow direction (arrow V) and the melt stream changes into two partial streams (arrows T 1, T 2) which are initially at an angle ⁇ of approximately 50 ° to the flow direction V in the direction of the outlet openings 18.1, 18.2.
  • these gas bubbles may have a different size. Schematically, this is indicated in the right part of Figure 1 by the arrows A, B and C, where C indicates a typical flow direction of large gas bubbles, B is a typical flow direction for gas bubbles medium size and A indicates the direction in which the smallest gas bubbles in the molten bath S be guided.
  • C indicates a typical flow direction of large gas bubbles
  • B is a typical flow direction for gas bubbles medium size
  • A indicates the direction in which the smallest gas bubbles in the molten bath S be guided.
  • the larger gas bubbles in particular those with a diameter of more than 1 mm, rise upwards in the molten bath S and cause the abovementioned metallurgical problems.
  • these larger gas bubbles can break up a scarfing layer 26 resting on the melt bath and / or a cast powder layer, as is also indicated schematically in the right-hand part of FIG.
  • a diving nozzle according to the invention differs by the geometry shown on the left in FIG. 1:
  • the dip tube is extended at opposite areas of the lower end portion 16 to the outside in each case by a chamber 20 which is bounded by an upper wall surface 20 o, a subsequent, outer and lateral, parallel to the body 10 extending wall surface 20 s and a part of the body 10 and down (towards the face plate 15) is open.
  • a chamber 20 which is bounded by an upper wall surface 20 o, a subsequent, outer and lateral, parallel to the body 10 extending wall surface 20 s and a part of the body 10 and down (towards the face plate 15) is open.
  • an opening 21 is arranged in the body 10, which creates a fluidic connection between the interior of the body 10 (which is the pouring channel 12) and the chamber 20.
  • the embodiment of Figure 2 differs from the embodiment of Figure 1 in that instead of the opening (s) 21 between the / the chamber (s) 20 and pouring channel 12 in the upper wall portion 2Oo of the chambers 20 gas outlet openings 23 are arranged through which the Gas bubbles can escape into the ambient atmosphere U, as also schematically indicated by circles.
  • the dimensioning of the immersion nozzle according to the embodiment of Figure 2 is such that the upper boundary wall 2Oo each chamber 20 above the molten bath S or the corresponding slag or G confusepulver Anlagen 26 runs so that the gas bubbles discharged through the gas outlet 23 can escape directly into the ambient atmosphere.
  • An immersion nozzle according to the invention includes the following features:
  • the G mankanalquerites corresponds to the inner cross section of the tubular body.
  • a tubular body in the form of a round cylinder in the section between the first and second end parts) cut
  • the deflection region for the melt at the outlet-side second end portion of the tubular body is an integral part of the dip tube.
  • the chamber volume and the inner volume of the entire immersion tube do not change in use (apart from erosion phenomena).
  • the dip tube is designed so that the vertically flowing from top to bottom melt at the second end portion is divided into at least two spaced apart streams, each associated with a chamber, viewed in the direction of flow of the melt, respectively before the area lies / lie where the melt stream or part of it leaves the dip tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention relates to an immersion nozzle, for use in the continuous casting of a metal melt, for example.

Description

„Tauchausguss" "Submerged nozzle"
B e s c h r e i b u n gDescription
Die Erfindung betrifft einen Tauchausguss, wie er zum Beispiel beim Stranggießen einer Metallschmelze verwendet wird.The invention relates to a diving spout, as used for example in the continuous casting of a molten metal.
Der EP 1 036 613 B l kann der grundsätzliche Aufbau eines solchen Tauchausgusses entnommen werden. Der Tauchausguss umfasst einen rohrförmigen Körper und einen Gießkanal, der sich von einem ersten Endabschnitt des rohrförmigen Körpers, bei dem eine Metallschmelze in den Gießkanal eintritt, bis zu einem zweiten Endabschnitt erstreckt, an dem die Metallschmelze den Gießkanal über mindestens eine Austrittsöffnung verlässt. Der Schrift ist zu entnehmen, dass auch Tauchausgüsse mit zwei diametral gegenüberliegenden seitlichen Austrittsöffnungen zum Stand der Technik gehören, so dass die Schmelze von einer zunächst rein vertikalen Strömungsrichtung in zwei Richtungen seitlich abgelenkt wird, bevor sie aus dem Tauchrohr austritt.The EP 1 036 613 B l, the basic structure of such a submersible nozzle can be removed. The immersion nozzle comprises a tubular body and a pouring passage extending from a first end portion of the tubular body at which a molten metal enters the pouring passage to a second end portion at which the molten metal leaves the pouring passage via at least one exit port. It can be seen from the document that immersion nozzles with two diametrically opposite lateral outlet openings also belong to the state of the art, so that the melt is laterally deflected from an initially purely vertical flow direction in two directions before it emerges from the immersion tube.
Bei gattungsgemäßen Tauchausgüssen ist es bekannt, ein Inertgas wie Argon der Metallschmelze zuzuführen, beispielsweise um ein so genanntes „clogging" zu verhindern, das heißt, zu verhindern, dass sich der Gießkanal durch Aufwachsungen in seinem Querschnitt verringert.In generic immersion nozzles, it is known to supply an inert gas such as argon of the molten metal, for example, to prevent a so-called "clogging", that is, to prevent the pouring channel is reduced by growths in its cross section.
Nachteilig bei dieser Verfahrenstechnik ist, dass zum Teil Gasblasen erheblicher Größe entstehen und mit dem Schmelzestrom in das metallurgische Schmelzbad geführt werden. Solche Gasblasen können einen Durchmesser von mehreren Millimetern, teilweise aber auch Durchmesser im Zentimeterbereich aufweisen. Sobald die Schmelze aus dem Tauchrohr in das Schmelzbad des metallurgischen Gefäßes (zum Beispiel in eine Kokille einer Strangguss- Anlage) überführt wurde, steigen insbesondere große Gasblasen zwar im Schmelzbad auf, es ergeben sich dabei aber weitere Probleme:A disadvantage of this process technology is that partly gas bubbles of considerable size arise and are conducted with the melt stream into the metallurgical melt pool. Such gas bubbles can have a diameter of several millimeters, but in some cases also diameters in the centimeter range. As soon as the melt has been transferred from the dip tube into the molten bath of the metallurgical vessel (for example into a mold of a continuous casting plant), large gas bubbles in particular rise in the molten bath, but further problems arise:
- Es kommt zu Turbulenzen im Übergangsbereich zwischen Tauchrohr und Schmelzbad, die sich negativ auf den Verschleiß des Tauchrohrs auswirken,Turbulence in the transition region between the dip tube and the molten bath, which has a negative effect on the wear of the dip tube,
- der Gießspiegel (die Oberfläche des Schmelzbades) kann schwanken, insbesondere im Grenzbereich zum Tauchrohr- The pouring mirror (the surface of the molten bath) may vary, especially in the border region to the dip tube
- die Schlacke kann schäumen,- the slag can foam,
- aufsteigende Gasblasen können eine auf dem Schmelzbad aufliegende Schlackenschicht und/oder eine Gießpulver-Schicht aufbrechen. Dabei kann es zu einem unerwünschten Kontakt der Schmelze mit Umgebungsluft kommen. Auch kann Gießschlacke in die Schmelze eingezogen werden.ascending gas bubbles can break up a slag layer resting on the molten bath and / or a casting powder layer. This can lead to undesirable contact of the melt with ambient air. Also, foundry slag can be drawn into the melt.
Zhang et. al. "Physical, Numerical and Industrial Investigation of Fluid Flow and Steel Cleanliness in the Continuous Casting MoId at Panzhihua Steel" beschreiben in AIS Tech 2004, Nashville (US), September 15-17, 2004, Association Iron Steel Technology, Warrendale, PA (US), 879-894 die Strömungsverhältnisse in Tauchrohren, wenn Gas injiziert wird. Bei bestimmten Betriebsbedingungen kommt zur Trennung von Gas und Schmelze. Dabei entstehen zum Teil sehr große Gasblasen, die das Tauchrohr verlassen und in die Schmelze eindringen. Die Erfindung möchte diese Nachteile vermeiden und einen Tauchausguss anbieten, der auch dann weitestgehend störungsfrei den Transport einer Metallschmelze in ein metallurgisches Schmelzgefäß erlaubt, wenn die Schmelze Gasblasen mitführt.Zhang et. al. Described in AIS Tech 2004, Nashville (US), Sept. 15-17, 2004, Association Iron Steel Technology, Warrendale, Pa. (US), "Physical, Numerical and Industrial Investigation of Fluid Flow and Steel Cleanliness in the Continuous Casting Month at Panzhihua Steel" ), 879-894, the flow conditions in dip tubes when gas is injected. Under certain operating conditions, gas and melt are separated. In some cases very large gas bubbles are created, which leave the dip tube and penetrate into the melt. The invention seeks to avoid these disadvantages and to offer a submersible nozzle, which also allows the transport of a molten metal into a metallurgical melting vessel largely without interference when the melt entrains gas bubbles.
Zur Lösung dieser Aufgabe geht die Erfindung von folgender Überlegung aus:To solve this problem, the invention proceeds from the following consideration:
Die beschriebene Ausbildung von Gasblasen, auch größeren Gasblasen, kann grundsätzlich nicht verhindert werden, im Gegenteil: Sie ist metallurgisch für bestimmte Anwendungen notwendig. Das erfindungsgemäße Konzept besteht darin, die vorhandenen Gasblasen möglichst unschädlich zu machen. Im Weiteren liegt der Erfindung die Überlegung zu Grunde, eine Möglichkeit zu schaffen, die Gasblasen aus dem Schmelzestrom zu entfernen, bevor die Metallschmelze aus dem Tauchrohr in ein Schmelzbad eines metallurgischen Schmelzgefäßes geführt wird.The described formation of gas bubbles, even larger gas bubbles, can not be prevented in principle, on the contrary: it is metallurgically necessary for certain applications. The inventive concept is to make the existing gas bubbles harmless as possible. Furthermore, the invention is based on the consideration to provide a way to remove the gas bubbles from the melt stream before the molten metal is passed from the dip tube into a molten bath of a metallurgical melting vessel.
Dabei macht sich die Erfindung zu nutze, dass Gasblasen innerhalb einer Metallschmelze aufsteigen (aufschwimmen). Die Tendenz der Gasblasen, aufzusteigen, ist umso größer, je größer die Gasblasen sind und je geringer die Viskosität der Metallschmelze ist. Das heißt, dass insbesondere die unerwünschten großen Gasblasen mit einem Durchmesser » 1 mm leichter aus der Schmelze entfernt werden können als kleine Gasblasen.The invention makes use of the fact that gas bubbles rise (float) within a molten metal. The tendency of the gas bubbles to rise is greater, the larger the gas bubbles are and the lower the viscosity of the molten metal. This means that in particular the unwanted large gas bubbles with a diameter of »1 mm can be removed from the melt more easily than small gas bubbles.
Vor diesem Hintergrund besteht der konkrete Erfindungsgedanke darin, unmittelbar vor dem Verlassen der Schmelze aus dem Tauchrohr eine Kammer vorzusehen, in die derartige Gasblasen aufsteigen (entweichen) können. Die Kammer wirkt als Auffangbehälter oder Puffergefäß für die genannten Gasblasen, bevor diese in das Schmelzbad (in der Kokille) gelangen. Weitere Überlegungen der Erfindungen gehen dahin, dieses Gas/diese Gasblasen entweder wieder in den Schmelzestrom innerhalb des Tauchrohres zurückzuführen, und zwar so, dass bei der Einleitung der Gasblasen in den Schmelzestrom die Gasblasen zerkleinert und damit weitestgehend unschädlich gemacht werden, oder in einer alternativen Ausführungsform das Gas aus dem System, das heißt in die Umgebungsatmosphäre, abzuziehen.Against this background, the concrete concept of the invention consists in providing a chamber from the dip tube immediately before leaving the melt, into which such gas bubbles can rise (escape). The chamber acts as a collecting container or buffer vessel for the said gas bubbles before they enter the molten bath (in the mold). Further considerations of the inventions go to either return this gas / gas bubbles in the melt stream within the dip tube, in such a way that when the gas bubbles are introduced into the melt stream, the gas bubbles are crushed and thus rendered largely harmless, or in an alternative embodiment remove the gas from the system, ie into the ambient atmosphere.
In ihrer allgemeinsten Ausführungsform betrifft die Erfindung demnach einen Tauchausguss mit folgenden Merkmalen:In its most general embodiment, the invention accordingly relates to a submersible nozzle with the following features:
1.1 Einem rohrförmigen Körper,1.1 a tubular body,
1.2 einem Gießkanal, der sich von einem ersten Endabschnitt des rohrförmigen Körpers, bei dem eine Metallschmelze in den Gießkanal eintritt, bis zu einem zweiten Endabschnitt erstreckt, an dem die Metallschmelze den Gießkanal über mindestens eine Austrittsöffnung verlässt,1.2 a pouring passage extending from a first end portion of the tubular body at which a molten metal enters the pouring passage to a second end portion at which the molten metal leaves the pouring passage via at least one exit port,
1.3 mindestens einer Kammer im Bereich des zweiten Endabschnitts, die in Strömungsrichtung der Metallschmelze hinter der jeweiligen Austrittsöffnung verläuft und sich in Richtung auf den ersten Endabschnitt erstreckt.1.3 at least one chamber in the region of the second end portion which extends in the flow direction of the molten metal behind the respective outlet opening and extending in the direction of the first end portion.
Dabei gehört ein Tauchausguss mit den Merkmalen 1.1 und 1.2 dem Stand der Technik an, der nun durch die konstruktive Gestaltung gemäß Merkmal 1.3 optimiert wird.In this case, a diving nozzle with the features 1.1 and 1.2 belongs to the prior art, which is now optimized by the structural design according to feature 1.3.
Bei einem Tauchausguss, wie er aus der eingangs genanntenIn a diving spout, as he from the aforementioned
EP 1 036 613 B l bekannt ist, verläuft die Schmelze im Gießkanal zunächst vertikal von oben nach unten, bevor sie geteilt und unter einem Winkel von circa 60° durch zwei diametral gegenüberliegende seitliche Austrittsöffnungen aus dem Tauchausguss weggeführt wird.EP 1 036 613 B l is known, the melt in the pouring passage initially runs vertically from top to bottom, before they split and under a Angle of approximately 60 ° is led away from the immersion nozzle by two diametrically opposite lateral outlet openings.
Die Erfindung sieht nun vor, am zweiten Endabschnitt des Tauchausgusses eine Kammer vorzusehen, die im strömungstechnischer Verbindung mit dem Gießkanal steht, so dass Gasblasen, die mit dem Schmelzestrom mitgeführt werden, aus dem Schmelzestrom in die Kammer aufsteigen können und so aus dem Teil der Schmelze entfernt werden, der in das metallurgische Schmelzgefäß beziehungsweise in dessen Schmelzbad einströmt.The invention now provides, at the second end portion of the immersion nozzle to provide a chamber which is in fluid communication with the pouring channel, so that gas bubbles, which are carried along with the melt stream, can rise from the melt stream into the chamber and so from the part of the melt are removed, which flows into the metallurgical melting vessel or in its molten bath.
Dabei steht im Vordergrund, insbesondere größere Gasblasen, das heißt Gasblasen mit einem Durchmesser von beispielsweise mehreren Millimetern (bis in den Zentimeterbereich), aus dem System wegzuführen, weil diese Gasblasen in besonderer Weise den Verfahrensprozess stören, wie oben ausgeführt.It is in the foreground, especially larger gas bubbles, ie gas bubbles with a diameter of, for example, several millimeters (down to the centimeter range), lead away from the system, because these gas bubbles disturb the process process in a special way, as stated above.
Der Schmelzestrom als solcher und die Strömungsrichtung der Schmelze bleibt gegenüber dem Stand der Technik weitestgehend unverändert.The melt stream as such and the flow direction of the melt remain largely unchanged from the prior art.
Die Kammer kann von einem Abschnitt des Gießkanals aus verlaufen, entlang dem die Metallschmelze unter einem Winkel > 0 und < 90° zur Axialrichtung des rohrförmigen Körpers strömt. Wenn es die Strömungsverhältnisse im metallurgischen Gefäß erlauben, kann der Winkel auch > 90° sein, wodurch die Tendenz der Gasblasen-Abscheidung verstärkt wird.The chamber may extend from a portion of the pouring channel along which the molten metal flows at an angle> 0 and <90 ° to the axial direction of the tubular body. If the flow conditions in the metallurgical vessel allow it, the angle can also be> 90 °, which enhances the tendency of gas bubble deposition.
Bei dem genannten Beispiel wäre dies der Abschnitt, bei dem die Metallschmelze von der exakt vertikalen Strömungsrichtung seitlich zu den Austrittsöffnungen abgelenkt wird. Dabei kann sich die Kammer im Wesentlichen radial außen an den Gießkanal anschließen, so dass die Begrenzungswand des Gießkanals eine innere Wand der Kammer bildet.In the example mentioned, this would be the section in which the molten metal is deflected from the exactly vertical flow direction laterally to the outlet openings. In this case, the chamber can connect substantially radially outside to the pouring channel, so that the boundary wall of the pouring channel forms an inner wall of the chamber.
Der Auffangraum für das Gas kann auch ringförmig um den Gießkanal herum verlaufen oder aus mehreren Kammern beabstandet zueinander bestehen.The collecting space for the gas may also run in an annular manner around the pouring channel or be spaced apart from one another by a plurality of chambers.
Mit Bezug auf die Ausführungsform eines Tauchausgusses gemäß EP 1 036 613 B l werden vorzugsweise zwei Kammern vorgesehen, wobei jede Kammer einem von zwei Schmelzeströmen am auslassseitigen Ende zugeordnet ist.With reference to the embodiment of a submersible nozzle according to EP 1 036 613 B1, preferably two chambers are provided, each chamber being associated with one of two melt streams at the outlet end.
Die Erfindung sieht im Weiteren vor, die Kammer im Abstand zum ersten Verbindungsbereich mit dem Gießkanal mit mindestens einem zweiten Verbindungsbereich (einer Öffnung) zum Gießkanal auszubilden, so dass die Kammer eine Art Bypass-Funktion erhält. Gasblasen, die am unteren Ende der Kammer (in Haupt-Strömungsrichtung der Schmelze betrachtet) nach oben in die Kammer aufgestiegen sind, können so am oberen Ende der Kammer, das ist das Ende der Kammer, welches dem ersten Endabschnitt des Gießkanals zugewandt ist, wieder in den Gießkanal und damit in den Schmelzestrom zurückgeführt werden. Dabei hat sich herausgestellt, dass bei der Rückführung der relativ großen Gasblasen in den Schmelzestrom es zu einer Zerkleinerung der Gasblasen auf ein weitestgehend unschädliches Maß kommt. Mit anderen Worten: Bei dieser Ausführungsform wird das Gas nicht aus dem System entfernt; die Gasblasen werden aber zerkleinert und zwar auf ein solches Maß, dass sie auch nach Eintritt in das Schmelzbad in das metallurgische Gefäßes nicht mehr die genannten Probleme bereiten. Vielmehr können dann die zerkleinerten Gasblasen langsam, ohne Turbulenzen und ohne Zerstörung von Schlacken- und Gießpulverschicht aufsteigen. Eine weitere Ausführungsform sieht vor, dass die Kammer im Abstand von ihrem unteren Ende, also in Richtung auf den ersten Endabschnitt des Tauchausgusses versetzt, eine Öffnung aufweist, die bei einer ordnungsgemäßen Verwendung des Tauchausgusses eine Verbindung zur Umgebungsatmosphäre schafft.The invention further provides to form the chamber at a distance from the first connection region with the pouring channel having at least one second connection region (an opening) to the pouring channel, so that the chamber receives a type of bypass function. Gas bubbles, which at the bottom of the chamber (viewed in the main flow direction of the melt) have risen up into the chamber, so at the upper end of the chamber, which is the end of the chamber, which faces the first end portion of the pouring channel again be returned to the pouring channel and thus into the melt stream. It has been found that when recycling the relatively large gas bubbles in the melt stream it comes to a crushing of the gas bubbles to a largely innocuous measure. In other words, in this embodiment, the gas is not removed from the system; but the gas bubbles are crushed and indeed to such a degree that they no longer cause the problems mentioned even after entering the molten bath in the metallurgical vessel. Rather, then the crushed gas bubbles can rise slowly, without turbulence and without destruction of slag and Gießpulverschicht. A further embodiment provides that the chamber at a distance from its lower end, that is offset in the direction of the first end portion of the immersion nozzle, having an opening which creates a connection to the ambient atmosphere with a proper use of the immersion nozzle.
Bei einem typischen Anwendungsfall, wie er in der EP 1 036 613 B l erläutert wird, bedeutet dies, dass die Öffnung oberhalb der Schlackenebene, beziehungsweise oberhalb einer Gießpulverebene angeordnet ist, in jedem Fall oberhalb der Schmelzebades, wenn der Tauchausguss sich in der Montageposition befindet. Bei dieser Ausführungsform wird das Gas also aus dem Bereich des Tauchausgusses in die Umgebungsatmosphäre weggeführt.In a typical application, as explained in EP 1 036 613 B l, this means that the opening above the slag level, or above a Gießpulverebene is arranged, in any case above the Schmelzebades when the immersion nozzle is in the mounting position , In this embodiment, the gas is thus carried away from the area of the immersion nozzle in the ambient atmosphere.
Der Gießkanal selbst und sein Verlauf insbesondere im zweiten Endabschnitt hin zu der Austrittsöffnung oder den Austrittsöffnungen kann gemäß Stand der Technik gestaltet sein. Es ist vorteilhaft, wenn der Gießkanal im zweiten Abschnitt so gestaltet ist, dass die Metallschmelze unter einem Winkel > 0 und < 90° zur Axialrichtung des rohrförmigen Körpers aus der Austrittsöffnung ausströmt, weil dies den Schmelzestrom beruhigt und die Gasblasen noch ausreichend nach oben aufsteigen können.The pouring channel itself and its course, in particular in the second end section, towards the outlet opening or the outlet openings can be designed according to the prior art. It is advantageous if the pouring channel in the second section is designed so that the molten metal flows out of the outlet opening at an angle of> 0 and <90 ° to the axial direction of the tubular body, because this calms the melt stream and the gas bubbles can still rise sufficiently upwards ,
Der genannte Strömungswinkel kann nach einer weiteren Ausführungsform auf > 45° und < 75° eingeschränkt werden.Said flow angle can be limited to> 45 ° and <75 ° according to another embodiment.
Der Tauchausguss lässt sich mit üblichen Verfahrenstechniken und unter Verwendung feuerfester Werkstoffe herstellen, beispielsweise als Gießoder Pressteil aus einem Versatz auf Basis einer Al2O3, TiO2, ZrO2, MgO, CaO etc.. Die Größe der Kammer hängt vom jeweiligen Anwendungsfall ab. Üblicherweise wird der Übergangsbereich (Öffnungsbereich) zwischen Gießkanal und Kammer eine Querschnittsfläche von 7 - 30 cm2 aufweisen und die Kammer insgesamt ein Volumen von beispielsweise 50 - 250 cm3, ausgehend von einem Tauchausguss mit einer Länge von 900 mm, einem Außendurchmesser von 120 mm, einem Durchmesser des Gießkanals von 70 mm und einer Querschnittsfläche der Austrittsöffnung/en von ca. 50 cm2.The immersion nozzle can be produced by conventional process techniques and using refractory materials, for example as cast or pressed part from an offset based on Al 2 O 3 , TiO 2 , ZrO 2 , MgO, CaO, etc. The size of the chamber depends on the particular application. Usually, the transition region (opening area) between the pouring channel and the chamber will have a cross-sectional area of 7-30 cm 2 and the chamber as a whole a volume of, for example, 50-250 cm 3 , starting from an immersion nozzle having a length of 900 mm and an outer diameter of 120 mm , a diameter of the pouring channel of 70 mm and a cross-sectional area of the outlet opening / s of about 50 cm 2 .
Soweit zu dieser Beschreibung und den Ansprüchen Richtungen angegeben sind beziehen sich diese auf eine Funktionsposition des Tauchausgusses bei bestimmungsgemäßer Anwendung.As far as specified for this description and the claims directions, these relate to a functional position of the immersion nozzle when used as intended.
Weitere Merkmale der Erfindung ergeben sich aus den Merkmalen der Unteransprüche sowie den sonstigen Anmeldungsunterlagen.Other features of the invention will become apparent from the features of the claims and the other application documents.
Die Erfindung wird nachstehend anhand zweier Ausführungsbeispiele näher erläutert, wobei die Figuren 1 und 2 jeweils in schematisierter Darstellung ein auslaufseitiges (zweites) Ende eines erfindungsgemäßen Tauchausgusses zeigen, bei Figur 1 links, während rechts der Stand der Technik gegenübergestellt ist.The invention will be explained in more detail below with reference to two exemplary embodiments, wherein FIGS. 1 and 2 each show in schematic representation an outflow-side (second) end of a diving spout according to the invention, on the left in FIG. 1, while the prior art is compared on the right.
In den Figuren sind gleiche oder gleichwirkende Bauteile mit gleichen Bezugszeichen angegeben.In the figures, identical or equivalent components are given the same reference numerals.
Figur 1 zeigt einen Tauchausguss mit einem rohrförmigen Körper 10, einem Gießkanal 12, der sich im Wesentlichen konzentrisch zur axialen Mittenlängsachse L des rohrförmigen Körpers erstreckt, und zwar von einem ersten Endabschnitt 14 des rohrförmigen Körpers, bei dem eine Metallschmelze in den Gießkanal eintritt, bis zu einem zweiten Endabschnitt 16, an dem die Metallschmelze den Gießkanal 12 über zwei seitliche Austrittsöffnungen 18.1 , 18.2 verlässt.Figure 1 shows a submersible nozzle with a tubular body 10, a pouring channel 12 which extends substantially concentric to the axial center longitudinal axis L of the tubular body, from a first end portion 14 of the tubular body, in which a molten metal enters the pouring channel, to to a second End section 16, at which the molten metal leaves the pouring channel 12 via two lateral outlet openings 18.1, 18.2.
Dazu ist der Gießkanal 12 im Bereich des zweiten Endabschnitts 16 so gestaltet, dass die Metallschmelze ihre ursprünglich rein vertikale Strömungsrichtung (Pfeil V) ändert und der Schmelzestrom in zwei Teilströme (Pfeile Tl , T2) übergeht, die zunächst unter einem Winkel α von circa 50° zur Strömungsrichtung V in Richtung auf die Austrittsöffnungen 18.1 , 18.2 verlaufen.For this purpose, the pouring channel 12 in the region of the second end section 16 is designed such that the molten metal changes its originally purely vertical flow direction (arrow V) and the melt stream changes into two partial streams (arrows T 1, T 2) which are initially at an angle α of approximately 50 ° to the flow direction V in the direction of the outlet openings 18.1, 18.2.
Diese Richtungsänderung wird unterstützt durch eine endseitige Stirnplatte 15 des Tauchausgusses mit entgegengesetzt geneigten Schrägflächen 15.1 , 15.2.. Dies alles ist Stand der Technik und im rechten Teil von Figur 1 dargestellt.This direction change is supported by an end face plate 15 of the immersion nozzle with oppositely inclined inclined surfaces 15.1, 15.2 .. All this is state of the art and shown in the right part of Figure 1.
Mit dem Schmelzestrom werden Gasblasen, die sich zum Beispiel aus einer Inertgasbehandlung der Schmelze ergeben, mitgeführt, wobei diese Gasblasen eine unterschiedliche Größe aufweisen können. Schematisch wird dies im rechten Teil von Figur 1 durch die Pfeile A, B und C angedeutet, wobei C eine typische Strömungsrichtung großer Gasblasen, B eine typische Strömungsrichtung für Gasblasen mittlerer Größe und A die Richtung anzeigt, in der die kleinsten Gasblasen in das Schmelzbad S geführt werden. Mit anderen Worten: Während Gasblasen kleinerer und mittlerer Größe sich mehr oder weniger homogen im Schmelzbad S verteilen, steigen die größeren Gasblasen, das sind insbesondere solche mit einem Durchmesser von mehr als 1 mm, nach oben im Schmelzbad S auf und verursachen die vorstehend genannten metallurgischen Probleme. Beispielsweise können diese größeren Gasblasen eine auf dem Schmelzbad aufliegende Scblackenschicht 26 und/oder eine Gießpulver- Schicht aufbrechen, wie dies ebenfalls schematisch im rechten Teil von Figur 1 angedeutet ist. Von diesem Stand der Technik unterscheidet sich ein erfindungsgemäßer Tauchausguss durch die in Figur 1 links dargestellt Geometrie:With the melt stream gas bubbles, resulting for example from an inert gas treatment of the melt entrained, these gas bubbles may have a different size. Schematically, this is indicated in the right part of Figure 1 by the arrows A, B and C, where C indicates a typical flow direction of large gas bubbles, B is a typical flow direction for gas bubbles medium size and A indicates the direction in which the smallest gas bubbles in the molten bath S be guided. In other words, while gas bubbles of smaller and medium size are more or less homogeneously distributed in the molten bath S, the larger gas bubbles, in particular those with a diameter of more than 1 mm, rise upwards in the molten bath S and cause the abovementioned metallurgical problems. By way of example, these larger gas bubbles can break up a scarfing layer 26 resting on the melt bath and / or a cast powder layer, as is also indicated schematically in the right-hand part of FIG. From this prior art, a diving nozzle according to the invention differs by the geometry shown on the left in FIG. 1:
Das Tauchrohr ist an gegenüberliegenden Bereichen des unteren Endabschnitts 16 nach außen jeweils um eine Kammer 20 erweitert, die von einer oberen Wandfläche 20o, einer daran anschließenden, äußeren und seitlichen, parallel zum Körper 10 verlaufenden Wandfläche 20s und einem Teil des Körpers 10 begrenzt wird und nach unten (in Richtung auf die Stirnplatte 15) offen ist. Im oberen Bereich der Kammer 20, also benachbart der oberen Wand 20o, ist im Körper 10 eine Öffnung 21 angeordnet, die eine strömungstechnische Verbindung zwischen dem Innenraum des Körpers 10 (das ist der Gießkanal 12) und der Kammer 20 schafft.The dip tube is extended at opposite areas of the lower end portion 16 to the outside in each case by a chamber 20 which is bounded by an upper wall surface 20 o, a subsequent, outer and lateral, parallel to the body 10 extending wall surface 20 s and a part of the body 10 and down (towards the face plate 15) is open. In the upper region of the chamber 20, ie adjacent to the upper wall 20 o, an opening 21 is arranged in the body 10, which creates a fluidic connection between the interior of the body 10 (which is the pouring channel 12) and the chamber 20.
Während der Schmelzestrom ähnlich wie im Stand der Technik am unteren Ende des Tauchausgusses bei 18.1 , 18.2 seitlich aus dem Tauchausguss herausgeführt wird, wobei feinste Gasblasen im Wesentlichen analog in Pfeilrichtung A und Gasblasen mittlerer Größe wie zuvor beschrieben in Pfeilrichtung B mitgeführt werden schafft die Kammer 20 die Möglichkeit, dass größere Gasblasen, die aufsteigen, nun nicht mehr im Schmelzbad S aufsteigen und eine Schlacken- oder Gießpulverschicht zerstören können, sondern in der Kammer 20 aufgefangen werden, wie durch den Pfeil C dargestellt. Diese großen Gasblasen gelangen im weiteren durch die Öffnung 21 in den Schmelzestrom im zweiten Endabschnitt 16 des Körpers 10 zurück, wo die Gasblasen durch den vorbeiströmenden Gießstrahl zerkleinert werden, wie schematisch durch kleinere Kreise im Bereich der Öffnung 21 angedeutet.While the melt stream similar to the prior art at the lower end of the immersion nozzle at 18.1, 18.2 is led out laterally from the immersion nozzle, wherein the finest gas bubbles are carried substantially analogously in the direction of arrow A and gas bubbles medium size as described above in the direction of arrow B creates the chamber 20th the possibility that larger gas bubbles rising up, now no longer rise in the molten bath S and can destroy a slag or Gießpulverschicht, but are collected in the chamber 20, as shown by the arrow C. These large gas bubbles further pass through the opening 21 back into the melt stream in the second end portion 16 of the body 10, where the gas bubbles are crushed by the passing pouring stream, as indicated schematically by smaller circles in the region of the opening 21.
Diese jetzt zerkleinerten (kleineren) Gasblasen, beispielsweise Argon- Blasen, werden dann in Pfeilrichtung V wieder mit dem Schmelzestrom -l i ¬These now crushed (smaller) gas bubbles, such as argon bubbles, are then in the direction of arrow V again with the melt stream -li ¬
mitgeführt und über die Austrittsöffnung 18.1 (und analog bei entsprechender Ausführung auf der anderen Seite über die Austrittsöffnung 18.2) in das Schmelzbad S des metallurgischen Gefäßes 24 eingeführt, und zwar entsprechend den Pfeilrichtungen A und B.entrained and introduced via the outlet opening 18.1 (and analogous to the corresponding embodiment on the other side via the outlet opening 18.2) in the molten bath S of the metallurgical vessel 24, in accordance with the directions of arrows A and B.
Die Ausführungsform nach Figur 2 unterscheidet sich von der Ausführungsform nach Figur 1 dadurch, dass anstelle der Öffnung(en) 21 zwischen der/den Kammer(n) 20 und Gießkanal 12 im oberen Wandabschnitt 2Oo der Kammern 20 Gasauslassöffnungen 23 angeordnet sind, durch die die Gasblasen in die Umgebungsatmosphäre U entweichen können, wie ebenfalls schematisch durch Kreise angedeutet.The embodiment of Figure 2 differs from the embodiment of Figure 1 in that instead of the opening (s) 21 between the / the chamber (s) 20 and pouring channel 12 in the upper wall portion 2Oo of the chambers 20 gas outlet openings 23 are arranged through which the Gas bubbles can escape into the ambient atmosphere U, as also schematically indicated by circles.
Die Dimensionierung des Tauchausgusses gemäß Ausführungsform nach Figur 2 ist derart, dass die obere Begrenzungswand 2Oo jeder Kammer 20 oberhalb des Schmelzbades S beziehungsweise der entsprechenden Schlacken- oder Gießpulverschicht 26 verläuft, so dass die über die Gasauslassöffnungen 23 austretenden Gasblasen direkt in die Umgebungsatmosphäre entweichen können.The dimensioning of the immersion nozzle according to the embodiment of Figure 2 is such that the upper boundary wall 2Oo each chamber 20 above the molten bath S or the corresponding slag or Gießpulverschicht 26 runs so that the gas bubbles discharged through the gas outlet 23 can escape directly into the ambient atmosphere.
Ein erfindungsgemäßer Tauchausguss inkludiert folgende Merkmale:An immersion nozzle according to the invention includes the following features:
- Die Ausbildung des Tauchausgusses als einstückiges Bauteil, das heißt, der rohrförmige Körper und die Kammer(n) sind materialschlüssig miteinander verbunden und können aus demselben feuerfesten keramischen Werkstoff bestehen.- The formation of the immersion nozzle as a one-piece component, that is, the tubular body and the chamber (s) are materially connected to each other and may consist of the same refractory ceramic material.
- Der Gießkanalquerschnitt entspricht dem Innenquerschnitt des rohrförmigen Körpers. Bei einem rohrförmigen Körper in Form eines runden Zylinders (im Abschnitt zwischen erstem und zweitem Endab- schnitt) ist auch der Querschnitt des Schmelzestroms in diesem Abschnitt kreisförmig.- The Gießkanalquerschnitt corresponds to the inner cross section of the tubular body. In the case of a tubular body in the form of a round cylinder (in the section between the first and second end parts) cut) is also the cross-section of the melt stream in this section circular.
Im rohrförmigen Körper verlaufen regelmäßig keine weiteren Einbauten oder Einsätze.In the tubular body run regularly no other installations or inserts.
Der Umlenkbereich für die Schmelze am auslaufseitigen zweiten Endabschnitt des rohrförmigen Körpers ist integraler Bestandteil des Tauchrohrs.The deflection region for the melt at the outlet-side second end portion of the tubular body is an integral part of the dip tube.
Das Kammervolumen und das innere Volumen des gesamten Tauchrohrs verändern sich im Gebrauch nicht (von Erosionserscheinungen abgesehen).The chamber volume and the inner volume of the entire immersion tube do not change in use (apart from erosion phenomena).
In der Regel ist das Tauchrohr so ausgeführt, dass die vertikal von oben nach unten fließende Schmelze am zweiten Endabschnitt in mindestens zwei zueinander beabstandete Teilströme aufgeteilt wird, denen jeweils eine Kammer zugeordnet ist, die in Strömungsrichtung der Schmelze betrachtet, jeweils vor dem Bereich liegt/liegen, an dem der Schmelzestrom oder ein Teil davon das Tauchrohr verlässt. In general, the dip tube is designed so that the vertically flowing from top to bottom melt at the second end portion is divided into at least two spaced apart streams, each associated with a chamber, viewed in the direction of flow of the melt, respectively before the area lies / lie where the melt stream or part of it leaves the dip tube.

Claims

„Tauchausguss"P a t e n t a n s p r ü c h e "Immersion nozzle" patent claim
1. Tauchausguss mit folgenden Merkmalen:1. immersion nozzle with the following features:
1.1 einem rohrförmigen Körper (10)1.1 a tubular body (10)
1.2 einem Gießkanal ( 12), der sich von einem ersten Endabschnitt (14) des rohrförmigen Körpers (10), bei dem eine Metallschmelze in den Gießkanal ( 12) eintritt, bis zu einem zweiten Endabschnitt (16) erstreckt, an dem die Metallschmelze den Gießkanal (12) über mindestens eine Austrittsöffnung (18.1 , 18.2) verlässt,1.2 a pouring passage (12) extending from a first end portion (14) of the tubular body (10) at which a molten metal enters the pouring passage (12) to a second end portion (16) at which the molten metal flows Gießkanal (12) via at least one outlet opening (18.1, 18.2) leaves,
1.3 mindestens einer Kammer (20) im Bereich des zweiten Endabschnitts (16), die in Strömungsrichtung der Metallschmelze hinter der jeweiligen Austrittsöffnung (18.1 , 18.2) verläuft und sich in Richtung auf den ersten Endabschnitt (14) erstreckt.1.3 at least one chamber (20) in the region of the second end portion (16) extending in the flow direction of the molten metal behind the respective outlet opening (18.1, 18.2) and extending in the direction of the first end portion (14).
2. Tauchausguss nach Anspruch 1 , bei dem die Kammer (20) im wesentlichen parallel zum Gießkanal (12) verläuft.2. immersion nozzle according to claim 1, wherein the chamber (20) extends substantially parallel to the pouring channel (12).
3. Tauchausguss nach Anspruch 1 , bei dem die Kammer (20) von einem Abschnitt des Gießkanals ( 12) aus verläuft, entlang dem die Metallschmelze unter einem Winkel >0 und <90 Grad zur Axialrichtung des rohrförmigen Körpers (10) strömt.3. immersion nozzle according to claim 1, wherein the chamber (20) extends from a portion of the pouring channel (12), along which the molten metal flows at an angle> 0 and <90 degrees to the axial direction of the tubular body (10).
4. Tauchausguss nach Anspruch 1 , bei dem die Kammer (20) innenseitig vom rohrförmigen Körper ( 10) begrenzt wird. 4. immersion nozzle according to claim 1, wherein the chamber (20) on the inside of the tubular body (10) is limited.
5. Tauchausguss nach Anspruch 4, mit mindestens einer Verbindungsöffnung (21 ) zwischen Kammer (20) und Gießkanal (12).5. immersion nozzle according to claim 4, with at least one connection opening (21) between the chamber (20) and the pouring channel (12).
6. Tauchausguss nach Anspruch 5 , bei dem die Öffnung (21 ) einem oberen Ende der Kammer (20) benachbart ist.6. immersion nozzle according to claim 5, wherein the opening (21) is adjacent to an upper end of the chamber (20).
7. Tauchausguss nach Anspruch 1 , mit mindestens einer Gasauslassöffnung (23) zwischen Kammer (20) und Umgebungsatmosphäre.7. immersion nozzle according to claim 1, with at least one gas outlet opening (23) between the chamber (20) and ambient atmosphere.
8. Tauchausguss nach Anspruch 1 , bei dem der Gießkanal (12) am zweiten Endabschnitt so gestaltet ist, dass die Metallschmelze unter einem Winkel >0 und <90 Grad zur Axialrichtung des rohrförmigen Körpers ( 10) aus der Austrittsöffnung ( 18.1 , 18.2) ausströmt.8. immersion nozzle according to claim 1, wherein the pouring channel (12) at the second end portion is designed so that the molten metal at an angle> 0 and <90 degrees to the axial direction of the tubular body (10) from the outlet opening (18.1, 18.2) flows out ,
9. Tauchausguss nach Anspruch 1 , bei dem der Gießkanal (12) am zweiten Endabschnitt (16) so gestaltet ist, dass die Metallschmelze unter einem Winkel >45 und <75 Grad zur Axialrichtung des rohrförmigen Körpers ( 10) aus der Austrittsöffnung ausströmt. 9. immersion nozzle according to claim 1, wherein the pouring channel (12) at the second end portion (16) is designed so that the molten metal flows at an angle> 45 and <75 degrees to the axial direction of the tubular body (10) from the outlet opening.
EP09744083.8A 2008-11-22 2009-10-29 Immersion nozzle Not-in-force EP2355946B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008058647A DE102008058647A1 (en) 2008-11-22 2008-11-22 submerged nozzle
PCT/EP2009/007731 WO2010057566A1 (en) 2008-11-22 2009-10-29 Immersion nozzle

Publications (2)

Publication Number Publication Date
EP2355946A1 true EP2355946A1 (en) 2011-08-17
EP2355946B1 EP2355946B1 (en) 2013-11-20

Family

ID=41350663

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09744083.8A Not-in-force EP2355946B1 (en) 2008-11-22 2009-10-29 Immersion nozzle

Country Status (10)

Country Link
US (1) US8517231B2 (en)
EP (1) EP2355946B1 (en)
CN (1) CN102239019B (en)
BR (1) BRPI0920957A2 (en)
CA (1) CA2743224C (en)
DE (1) DE102008058647A1 (en)
MX (1) MX2011005327A (en)
RU (1) RU2476292C2 (en)
TW (1) TW201021943A (en)
WO (1) WO2010057566A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2609983T3 (en) * 2013-06-20 2017-04-25 Refractory Intellectual Property Gmbh & Co. Kg Submerged refractory inlet nozzle
TW201532709A (en) * 2013-11-07 2015-09-01 Vesuvius Crucible Co Nozzle for casting metal beams
CN107552765B (en) * 2017-08-11 2020-07-28 徐州东力锻压机械有限公司 Be used for as cast stalk

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3349838A (en) * 1965-06-04 1967-10-31 American Smelting Refining Float control valve for continuous casting
DE1959097C2 (en) * 1969-11-20 1973-10-04 Mannesmann Ag, 4000 Duesseldorf Device in continuous casting for distributing eggs molten steel
FR2227728A5 (en) * 1973-04-26 1974-11-22 Monoplast Intermittent liquid pouring spout - has cup facing inlet nozzle inside peripheral skirt forming annular outlet
US4487251A (en) * 1982-03-08 1984-12-11 Vesuvius Crucible Company Continuous casting apparatus and a method of using the same
JPH07227B2 (en) 1985-08-29 1995-01-11 黒崎窯業株式会社 Immersion nozzle and manufacturing method thereof
DE4317620C1 (en) * 1993-02-08 1994-08-11 Max Planck Inst Eisenforschung Process for separating non-metallic inclusions from liquid metals and ceramic chamber therefor
DE4320723A1 (en) 1993-06-23 1995-01-05 Didier Werke Ag Immersion spout
AUPN770296A0 (en) * 1996-01-24 1996-02-15 Bhp Steel (Jla) Pty Limited Strip casting
DE19722890A1 (en) * 1997-05-28 1998-12-03 Mannesmann Ag Diving spout
GB9906116D0 (en) 1999-03-17 1999-05-12 Didier Werke Ag Refractory product
JP3519013B2 (en) 1999-03-17 2004-04-12 アルプス電気株式会社 Rotating connector
IT1317137B1 (en) * 2000-03-08 2003-05-27 Danieli Off Mecc PERFECTED UNLOADER FOR CONTINUOUS CASTING
JP2003266155A (en) * 2002-03-12 2003-09-24 Nippon Steel Corp Method for continuously casting molten steel and immersion nozzle used for the continuous casting
RU2236326C2 (en) * 2002-11-04 2004-09-20 Хлопонин Виктор Николаевич Method for continuous casting of steel from intermediate ladle to mold and submersible nozzle for performing the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010057566A1 *

Also Published As

Publication number Publication date
RU2011120043A (en) 2012-11-27
US20110233237A1 (en) 2011-09-29
CN102239019B (en) 2014-04-16
TW201021943A (en) 2010-06-16
DE102008058647A1 (en) 2010-06-10
CN102239019A (en) 2011-11-09
WO2010057566A1 (en) 2010-05-27
CA2743224C (en) 2014-03-18
US8517231B2 (en) 2013-08-27
MX2011005327A (en) 2011-06-24
EP2355946B1 (en) 2013-11-20
BRPI0920957A2 (en) 2015-12-29
RU2476292C2 (en) 2013-02-27
CA2743224A1 (en) 2010-05-27

Similar Documents

Publication Publication Date Title
DE2240643C3 (en) Nozzle stone for ladles on metal atomization systems
DE69514956T2 (en) Immersion pipe for continuous casting
EP0630712B1 (en) Immersion nozzle
DE2902096C2 (en)
DE112009000614B4 (en) Upper nozzle
EP2355946B1 (en) Immersion nozzle
DE2442915A1 (en) POUR PIPE WITH CLOSED BOTTOM AND OPPOSITE LATERAL OPENINGS
EP1294508B1 (en) Refractory pouring spout and channel unit for the arrangement on an outlet of a vessel containing molten metal, especially a tundish of a strip casting installation
DE3876796T3 (en) Dip tube for steel casting.
EP0694359A1 (en) An immersed casting tube
DE69604037T2 (en) Fireproof pouring nozzle
DE333576C (en) Sand filter
DE2548585B2 (en) DEVICE FOR CONTINUOUS STEEL CASTING
EP2543455B1 (en) Fire-resistant ceramic sliding plate and accompanying sliding plate set
EP0900609B1 (en) Submerged nozzle for feeding a molten metal from a casting vessel or a tundish into a mould
DE2607379B2 (en) DEVICE FOR FLUSHING STEEL
DE2250048A1 (en) Refractory pouring pipe for continuous casting of molten metals
DE3700107C2 (en)
DE3509113C2 (en)
DE19756687C1 (en) Method and apparatus for separating nonmetal inclusions from metal melts
EP2253916A1 (en) Metallurgical melt and treatment assembly
EP0558018B1 (en) Refractory ceramic prefabricated element for mounting in a tundish
DE2712444C3 (en) Swirl chamber valve
WO2009033633A1 (en) Refractory ceramic adaptor
DE10113026C2 (en) Immersion tube for pouring molten metal, especially molten steel

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20110429

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20120411

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAJ Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR1

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20130703

INTG Intention to grant announced

Effective date: 20130716

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 641272

Country of ref document: AT

Kind code of ref document: T

Effective date: 20131215

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502009008382

Country of ref document: DE

Effective date: 20140116

REG Reference to a national code

Ref country code: NL

Ref legal event code: T3

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131120

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140220

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131120

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140320

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131120

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131120

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131120

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140320

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131120

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502009008382

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131120

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131120

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131120

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131120

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131120

26N No opposition filed

Effective date: 20140821

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502009008382

Country of ref document: DE

Effective date: 20140821

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: TR

Payment date: 20141021

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131120

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131120

Ref country code: LU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141029

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20141029

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141031

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141029

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141031

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141029

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131120

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140221

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131120

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131120

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131120

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20091029

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20161028

Year of fee payment: 8

Ref country code: FR

Payment date: 20161025

Year of fee payment: 8

Ref country code: FI

Payment date: 20161024

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20161024

Year of fee payment: 8

Ref country code: IT

Payment date: 20161025

Year of fee payment: 8

Ref country code: BE

Payment date: 20161025

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151029

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20171023

Year of fee payment: 9

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502009008382

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 641272

Country of ref document: AT

Kind code of ref document: T

Effective date: 20171029

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131120

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20180629

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171029

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180501

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20171031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171029

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171031

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171029

REG Reference to a national code

Ref country code: NL

Ref legal event code: MM

Effective date: 20181101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20181101