EP0630712B1 - Immersion nozzle - Google Patents
Immersion nozzle Download PDFInfo
- Publication number
- EP0630712B1 EP0630712B1 EP94104560A EP94104560A EP0630712B1 EP 0630712 B1 EP0630712 B1 EP 0630712B1 EP 94104560 A EP94104560 A EP 94104560A EP 94104560 A EP94104560 A EP 94104560A EP 0630712 B1 EP0630712 B1 EP 0630712B1
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- EP
- European Patent Office
- Prior art keywords
- immersion nozzle
- moulded
- immersion
- section
- brick
- 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.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/52—Manufacturing or repairing thereof
-
- 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
- B22D41/502—Connection arrangements; Sealing means therefor
Definitions
- the invention relates to an immersion nozzle, in particular for thin slab casting, which is subdivided into an upper and a lower section, the upper section widening towards the lower section in a longitudinal section plane and tapering towards the lower section in a longitudinal section plane perpendicular thereto and the lower section being one Immersion zone forms.
- Such an immersion nozzle is described in DE 37 09 188 A1. It is subdivided into different lengths, which can consist of different materials. However, the immersion nozzle is a one-piece component. The manufacture of such an immersion nozzle is complex. When worn, it must always be replaced as a whole.
- DE 40 24 520 C2 describes a connection between the outlet of a metallurgical vessel and an immersion spout.
- a concentric annular space with a feed line for inert gas is provided in the area of the seat of the immersion spout at the outlet.
- a compressible ring is arranged below the annular space as a sealing ring.
- a display device for the gas pressure present in the annular space is provided in the feed of the inert gas. If a leak occurs on one of the sealing rings, the gas pressure drops and the display device issues an alarm signal.
- the object of the invention is to propose an immersion nozzle of the type mentioned at the outset, the manufacture of which is simplified and in which individual sections of the immersion nozzle are interchangeable.
- each of the sections is formed by at least one separate molded block, the molded blocks engaging at their mutually facing ends and a seal being arranged between the interlocking ends of the molded blocks.
- the immersion nozzle is composed of at least two separate shaped blocks made of refractory ceramic material simplifies production. Because each of the different shaped stones in the basic shape and in the flow cross section can be manufactured in a way that is favorable for him. In addition, each of the shaped stones can be produced from the refractory ceramic material corresponding to its thermal or melt-related stress.
- the construction according to the invention is also advantageous when adapting the immersion spout to different metallurgical vessels, from which the immersion spout is intended to guide the molten metal in geometrically different molds, because identical shaped stones forming the upper section are assembled with different shaped stones forming the lower section and vice versa can.
- a kit of shaped stones can thus be kept ready, the appropriate shaped stones being selected from the kit in the respective case of need.
- the seal between the interlocking ends of the shaped blocks prevents outside air from entering the interior of the immersion spout.
- the seal absorbs different thermal expansions of the shaped blocks. Such different thermal expansions can result from different thermal expansion coefficients of the materials used for the shaped blocks and / or due to the different temperatures at the shaped blocks.
- the seal also makes it possible to move the two shaped blocks relative to one another. This makes it easier to insert the immersion zone, in particular an immersion zone that is closely matched to the cross section of the mold, into the mold.
- the seal is preferably formed by an annular channel in the interlocking ends of the shaped blocks, with compressible sealing rings being arranged above and below the annular channel. Such a seal is described in DE 40 24 520 C2.
- the molded block forming the immersion zone is a separate component, it is easily possible to form longitudinal webs in this molded block, which have a favorable influence on the melt flow.
- the upper section of the immersion spout is preferably formed from two separate shaped stones, one shaped stone forming a tubular inlet channel for the melt and the other shaped stone forming a flow shaft which tapers downward in a longitudinal sectional plane and widens downward in a longitudinal sectional plane perpendicular thereto.
- the immersion nozzle is composed of three shaped stones which are sealed off from one another in the manner described.
- the shaped block forming the inlet channel can be made of a different refractory ceramic material than the geometrically more difficult shaped block forming the widening and narrowing flow shaft.
- An immersion spout 1 made of refractory ceramic materials has a flange 2 at the top with which it can be fastened to an outlet of a metallurgical vessel (not shown in more detail).
- the immersion nozzle 1 is composed of three shaped stones 3, 4, 5.
- the upper molded block 3 and the middle molded block 4 form an upper section 6 of the immersion spout 1 and the lower molded block 5 represents a lower section 7 of the immersion spout 1.
- the lower molded block 5 forms the immersion zone 8 with which it enters the melt of a mold K protrudes.
- the lower shaped block 5 is dimensioned in the area of the mold K so that it closely occupies the width B and the length L of the mold K, the length L being substantially greater than the width B, as is customary in the case of a thin slab mold.
- the lower molded block 5 is accordingly designed as thin-walled as possible in the immersion zone 8, in any case thinner-walled than the immersion spout for the rest.
- FIGS. 1 and 2 fracture lines a, b are shown, which represent the shortening of the heights of the shaped block 3 and the shaped block 5.
- Figure 1 further break lines c are included, which represent the shortening of the shaped blocks 4 and 5 with respect to the length of the mold K.
- the shaped block 3 has an essentially tubular shape and forms a cylindrical inlet channel 9 for the melt. At its lower end 10, the upper shaped block 3 tapers conically. It is inserted with this end 10 in an upwardly conically widening end 11 of the middle shaped block 4.
- the middle shaped block 4 forms a flow shaft 12, which widens in the longitudinal sectional plane of FIG. 1 with respect to the inlet channel 9 towards the lower shaped block 5.
- the flow shaft 12 of the middle shaped block 4 tapers from the inlet channel 9 to the lower shaped block 5.
- the flow shaft 12 of the middle shaped block 4 thus has the same shape in the area in which it merges into the flow cross section 13 of the lower shaped block 5.
- a transverse web 14 is formed in the middle shaped block 4, which deflects the melt flow in the direction of the expansion of the flow shaft 12.
- the middle shaped block 4 tapers conically at its lower end 15. This lower end 15 engages in a conically widening upper end 16 of the lower shaped block 5.
- Longitudinal webs 17 are formed within the flow cross-section 13 of the lower shaped block 5 and run parallel to the longitudinal axis A of the immersion spout 1 or at an angle to the same.
- the longitudinal webs 17 serve to stabilize the lower molded block 5 and / or to divide and align the melt flow flowing through the flow cross section 13 of the lower molded block 5.
- the lower molded block 5 has a plurality of outlet openings 18, 19 at its lower end, which plunges into the mold K.
- the outlet openings 18, 19 are delimited by opening edges 18 ', 19'.
- the opening edges 18 ', 19' lie obliquely to the horizontal or obliquely to the vertical longitudinal axis A.
- the opening edges 18 'near the center or the longitudinal axis A run less steeply than the opening edges 19 lying further out '(see Figure 1).
- the uniform melt distribution in the mold K is improved, even if the lower molded block 5 is not particularly close to the length L of the mold K.
- FIG. 3 shows various cross-sectional shapes of the design of the flow cross section 13 of the lower shaped block 5.
- the flow channels designed in the lower form 5 can then be circular or trapezoidal with different diameters. Other cross-sectional shapes are also possible.
- a seal 20 is provided between the lower end 10 and the upper end 11 and the lower end 15 and the upper end 16 of the shaped blocks 3, 4, 5.
- This consists of an annular channel 21 in the upper end 11 and 16 respectively Shaped stones 4 and 5 and a compressible sealing ring 22, which is inserted above the ring channel 21 between the ends and a compressible sealing ring 23, which is inserted below the ring channel 21 between the ends.
- the sealing rings 22, 23 can consist of a ceramic fiber material and can also be connected to one another.
- a gas line 24, which is under the pressure of an inert gas, is connected to the ring channel 21.
- the inert gas pressure can be monitored by a display device so that a leak due to the pressure drop can be determined.
- the middle shaped block 4, together with the lower shaped block 5, can be pivoted about the longitudinal axis A with respect to the upper shaped block 3, because the ends 10, 11 engage in a rotationally symmetrical manner.
- a holding device 26 On the lower molded block 5 there are outwardly projecting surfaces 25 above the immersion zone 8. These surfaces 25 can be gripped by a holding device 26 by means of angles 27. This makes it possible to hold the three shaped stones 3, 4, 5 of the immersion spout 1 securely together during operation, without the ends 10, 11; 15, 16 special axially acting connecting means are provided. This holding device 26 also allows the immersion spout 1 to be introduced securely into the mold 1, to be held therein and to be moved out of it. In addition, this holding device 26 also makes it easy to replace individual shaped blocks 3, 4, 5.
- the shaped blocks 3, 4, 5 can consist of different refractory ceramic materials and can be produced in different processes.
- the upper molded block 3 can consist of an Al 2 O 3 -C and be produced in an isostatic process.
- the middle shaped block 4 can consist of Al 2 O 3 and be produced in another process.
- the lower shaped block 5 can be made from ZrO 2 .
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Continuous Casting (AREA)
Description
Die Erfindung betrifft einen Eintauchausguß, insbesondere zum Dünnbrammengießen, der in einen oberen und einen unteren Abschnitt unterteilt ist, wobei sich der obere Abschnitt in einer Längsschnittebene zum unteren Abschnitt hin verbreitert und in einer dazu senkrechten Längsschnittebene zum unteren Abschnitt hin verjüngt und der untere Abschnitt eine Eintauchzone bildet.The invention relates to an immersion nozzle, in particular for thin slab casting, which is subdivided into an upper and a lower section, the upper section widening towards the lower section in a longitudinal section plane and tapering towards the lower section in a longitudinal section plane perpendicular thereto and the lower section being one Immersion zone forms.
Ein derartiger Eintauchausguß ist in der DE 37 09 188 A1 beschrieben. Bei ihm ist zwar eine Untergliederung in verschiedene Längenabschnitte vorgenommen, die aus unterschiedlichen Werkstoffen bestehen können. Der Eintauchausguß ist jedoch ein einstückiges Bauteil. Die Herstellung eines solchen Eintauchausgusses ist aufwendig. Bei Verschleiß muß er immer als Ganzes ersetzt werden.Such an immersion nozzle is described in DE 37 09 188 A1. It is subdivided into different lengths, which can consist of different materials. However, the immersion nozzle is a one-piece component. The manufacture of such an immersion nozzle is complex. When worn, it must always be replaced as a whole.
In der DE 40 24 520 C2 ist eine Verbindung zwischen dem Auslauf eines metallurgischen Gefäßes und einem Eintauchausguß beschrieben. Im Bereich des Sitzes des Eintauchausgusses am Auslauf ist ein konzentrischer Ringraum mit einer Zuleitung für Inertgas vorgesehen. Oberhalb und unterhalb des Ringraums ist ein kompressibler Ring als Dichtring angeordnet. In der Zuleitung des Inertgases ist eine Anzeigeeinrichtung für den im Ringraum anstehenden Gasdruck vorgesehen. Tritt an einem der Dichtringe eine Undichtigkeit auf, dann sinkt der Gasdruck ab und die Anzeigeeinrichtung gibt ein Alarmsignal.DE 40 24 520 C2 describes a connection between the outlet of a metallurgical vessel and an immersion spout. A concentric annular space with a feed line for inert gas is provided in the area of the seat of the immersion spout at the outlet. Above and A compressible ring is arranged below the annular space as a sealing ring. A display device for the gas pressure present in the annular space is provided in the feed of the inert gas. If a leak occurs on one of the sealing rings, the gas pressure drops and the display device issues an alarm signal.
Aufgabe der Erfindung ist es, einen Eintauchausguß der eingangs genannten Art vorzuschlagen, dessen Herstellung vereinfacht ist und bei dem eine Austauschbarkeit einzelner Abschnitte des Eintauchausgusses gegeben ist.The object of the invention is to propose an immersion nozzle of the type mentioned at the outset, the manufacture of which is simplified and in which individual sections of the immersion nozzle are interchangeable.
Erfindungsgemäß ist obige Aufgabe bei einem Eintauchausguß der eingangs genannten Art dadurch gelöst, daß jeder der Abschnitte von wenigstens einem separaten Formstein gebildet ist, wobei die Formsteine an ihren einander zugewandten Enden ineinander eingreifen und zwischen den ineinandergreifenden Enden der Formsteine eine Dichtung angeordnet ist.According to the invention, the above object is achieved with an immersion nozzle of the type mentioned at the outset in that each of the sections is formed by at least one separate molded block, the molded blocks engaging at their mutually facing ends and a seal being arranged between the interlocking ends of the molded blocks.
Dadurch, daß der Eintauchausguß aus wenigstens zwei separaten Formsteinen aus feuerfestem keramischen Material zusammengesetzt ist, ist die Herstellung vereinfacht. Denn jeder der in der Grundform und im Strömungsquerschnitt unterschiedlichen Formsteine läßt sich in einer für ihn günstigen Weise fertigen. Außerdem läßt sich jeder der Formsteine aus dem seiner thermischen oder schmelzenbedingten Beanspruchung entsprechenden feuerfesten keramischen Material herstellen.The fact that the immersion nozzle is composed of at least two separate shaped blocks made of refractory ceramic material simplifies production. Because each of the different shaped stones in the basic shape and in the flow cross section can be manufactured in a way that is favorable for him. In addition, each of the shaped stones can be produced from the refractory ceramic material corresponding to its thermal or melt-related stress.
Nach einer gewissen Betriebsdauer muß nur der tatsächlich verschlissene Formstein ausgetauscht werden. Der bzw. die anderen Formsteine des Eintauchausgusses können weiterverwendet werden.After a certain period of operation, only the stone that is actually worn has to be replaced. The other shaped stone (s) of the immersion nozzle can continue to be used.
Auch bei der Anpassung des Eintauchausgusses an verschiedene metallurgische Gefäße, aus denen der Eintauchausguß die Metallschmelze in geometrisch unterschiedlichen Kokillen leiten soll, ist der erfindungsgemäße Aufbau vorteilhaft, weil gleiche, den oberen Abschnitt bildende Formsteine mit verschiedenen, den unteren Abschnitt bildenden Formsteinen und umgekehrt zusammengesetzt werden können. Es läßt sich also ein Bausatz von Formsteinen bereithalten, wobei im jeweiligen Bedarfsfall die passenden Formsteine aus dem Bausatz ausgewählt werden.The construction according to the invention is also advantageous when adapting the immersion spout to different metallurgical vessels, from which the immersion spout is intended to guide the molten metal in geometrically different molds, because identical shaped stones forming the upper section are assembled with different shaped stones forming the lower section and vice versa can. A kit of shaped stones can thus be kept ready, the appropriate shaped stones being selected from the kit in the respective case of need.
Durch die Dichtung zwischen den ineinandergreifenden Enden der Formsteine wird verhindert, daß Außenluft in den Innenraum des Eintauchausgusses eindringen kann. Außerdem nimmt die Dichtung unterschiedliche Wärmedehnungen der Formsteine auf. Solche unterschiedlichen Wärmedehnungen können sich aufgrund unterschiedlicher Wärmedehnungskoeffizienten der für die Formsteine verwendeten Materialien und/oder aufgrund der unterschiedlichen Temperaturen an den Formsteinen ergeben.The seal between the interlocking ends of the shaped blocks prevents outside air from entering the interior of the immersion spout. In addition, the seal absorbs different thermal expansions of the shaped blocks. Such different thermal expansions can result from different thermal expansion coefficients of the materials used for the shaped blocks and / or due to the different temperatures at the shaped blocks.
Die Dichtung ermöglicht es auch, die beiden Formsteine relativ zueinander zu bewegen. Dadurch ist das Einführen der Eintauchzone, insbesondere einer an den Querschnitt der Kokille eng angepaßten Eintauchzone, in die Kokille erleichtert.The seal also makes it possible to move the two shaped blocks relative to one another. This makes it easier to insert the immersion zone, in particular an immersion zone that is closely matched to the cross section of the mold, into the mold.
Die Dichtung ist vorzugsweise durch einen Ringkanal in den ineinandergreifenden Enden der Formsteine gebildet, wobei oberhalb und unterhalb des Ringkanals kompressible Dichtringe angeordnet sind. Eine solche Dichtung ist in der DE 40 24 520 C2 beschrieben.The seal is preferably formed by an annular channel in the interlocking ends of the shaped blocks, with compressible sealing rings being arranged above and below the annular channel. Such a seal is described in DE 40 24 520 C2.
Da der die Eintauchzone bildende Formstein ein separates Bauteil ist, ist es einfach möglich, in diesem Formstein Längsstege auszubilden, die die Schmelzenströmung günstig beeinflussen.Since the molded block forming the immersion zone is a separate component, it is easily possible to form longitudinal webs in this molded block, which have a favorable influence on the melt flow.
Vorzugsweise ist der obere Abschnitt des Eintauchausgusses aus zwei separaten Formsteinen gebildet, wobei der eine Formstein einen rohrförmigen Einlaufkanal für die Schmelze bildet und der andere Formstein einen Strömungsschacht bildet, der sich in einer Längsschnittebene nach unten verjüngt und in einer hierzu senkrechten Längsschnittebene nach unten verbreitert. Der Eintauchausguß ist in diesem Fall aus drei Formsteinen zusammengesetzt, die in der beschriebenen Weise gegeneinander abgedichtet sind. Der den Einlaufkanal bildende Formstein kann dabei aus einem anderen feuerfesten keramischen Material hergestellt sein, als der geometrisch schwierigere den sich verbreiternden und verschmälernden Strömungsschacht bildende Formstein.The upper section of the immersion spout is preferably formed from two separate shaped stones, one shaped stone forming a tubular inlet channel for the melt and the other shaped stone forming a flow shaft which tapers downward in a longitudinal sectional plane and widens downward in a longitudinal sectional plane perpendicular thereto. In this case, the immersion nozzle is composed of three shaped stones which are sealed off from one another in the manner described. The shaped block forming the inlet channel can be made of a different refractory ceramic material than the geometrically more difficult shaped block forming the widening and narrowing flow shaft.
Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen und der folgenden Beschreibung eines Ausführungsbeispiels. In der Zeichnung zeigen:
- Figur 1
- einen dreiteiligen Eintauchausguß im Längsschnitt,
Figur 2- den Eintauchausguß nach Figur 1, in einer zur Längsschnittebene der Figur 1 senkrechten Längsschnittebene längs der Linie II-II nach Figur 1, und
Figur 3- verschiedene Austrittsquerschnitte der Eintauchzone des Eintauchausgusses.
- Figure 1
- a three-part immersion nozzle in longitudinal section,
- Figure 2
- 1, in a longitudinal sectional plane perpendicular to the longitudinal sectional plane of FIG. 1 along the line II-II according to FIG. 1, and
- Figure 3
- different outlet cross-sections of the immersion zone of the immersion nozzle.
Ein Eintauchausguß 1 aus feuerfesten keramischen Materialien weist oben einen Flansch 2 auf, mit dem er an einem nicht näher dargestellten Auslauf eines metallurgischen Gefäßes befestigbar ist.An immersion spout 1 made of refractory ceramic materials has a
Der Eintauchausguß 1 ist aus drei Formsteinen 3, 4, 5 zusammengesetzt. Dabei bilden der obere Formstein 3 und der mittlere Formstein 4 einen oberen Abschnitt 6 des Eintauchausgusses 1 und der untere Formstein 5 stellt einen unteren Abschnitt 7 des Eintauchausgusses 1 dar. Der untere Formstein 5 bildet die Eintauchzone 8, mit der er in die Schmelze einer Kokille K ragt.The immersion nozzle 1 is composed of three
Der untere Formstein 5 ist im Bereich der Kokille K so bemessen, daß er eng die Breite B und die Länge L der Kokille K einnimmt, wobei die Länge L wesentlich größer ist als die Breite B, wie dies bei einer Dünnbrammenkokille üblich ist. Der untere Formstein 5 ist dementsprechend in der Eintauchzone 8 möglichst dünnwandig gestaltet, jedenfalls dünnwandiger als der Eintauchausguß im übrigen.The lower shaped block 5 is dimensioned in the area of the mold K so that it closely occupies the width B and the length L of the mold K, the length L being substantially greater than the width B, as is customary in the case of a thin slab mold. The lower molded block 5 is accordingly designed as thin-walled as possible in the immersion zone 8, in any case thinner-walled than the immersion spout for the rest.
In den Figuren 1 und 2 sind Bruchlinien a, b angegeben, die die zeichnerische Verkürzung der Höhen des Formsteins 3 und des Formsteins 5 darstellen. In Figur 1 sind weitere Bruchlinien c enthalten, die die zeichnerische Verkürzung der Formsteine 4 und 5 hinsichtlich der Länge der Kokille K darstellen.In FIGS. 1 and 2, fracture lines a, b are shown, which represent the shortening of the heights of the
Der Formstein 3 weist eine im wesentlichen rohrförmige Gestalt auf und bildet einen zylindrischen Einlaufkanal 9 für die Schmelze. An seinem unteren Ende 10 verjüngt sich der obere Formstein 3 konisch. Er ist mit diesem Ende 10 in ein sich nach oben konisch erweiterndes Ende 11 des mittleren Formsteins 4 eingesetzt.The
Der mittlere Formstein 4 bildet einen Strömungsschacht 12, der sich in der Längsschnittebene der Figur 1 gegenüber dem Einlaufkanal 9 zum unteren Formstein 5 hin erweitert. In der Längsschnittebene der Figur 2 verjüngt sich der Strömungsschacht 12 des mittleren Formsteins 4 vom Einlaufkanal 9 zum unteren Formstein 5 hin. Der Strömungsschacht 12 des mittleren Formsteins 4 weist damit im Bereich, in dem er in den Strömungsquerschnitt 13 des unteren Formsteins 5 übergeht, die gleiche Gestalt auf wie dieser.The middle shaped
Unterhalb des Einlaufkanals 9 ist in dem mittleren Formstein 4 ein Quersteg 14 ausgebildet, welcher die Schmelzenströmung in Richtung der Erweiterung des Strömungsschachts 12 auslenkt.Below the
Der mittlere Formstein 4 verjüngt sich konisch an seinem unteren Ende 15. Dieses untere Ende 15 greift in ein sich konisch erweiterndes oberes Ende 16 des unteren Formsteins 5 ein.The middle shaped
Innerhalb des Strömungsquerschnitts 13 des unteren Formsteins 5 sind Längsstege 17 ausgebildet, die parallel zur Längsachse A des Eintauchausgusses 1 oder schräg zu dieser verlaufen. Die Längsstege 17 dienen der Stabilisierung des unteren Formsteins 5 und/oder der Aufteilung und Ausrichtung der den Strömungsquerschnitt 13 des unteren Formsteins 5 durchströmenden Schmelzenflusses.
Der untere Formstein 5 weist an seinem unteren, in die Kokille K eintauchenden Ende mehrere Austrittsöffnungen 18, 19 auf. Die Austrittsöffnungen 18, 19 sind von Öffnungsrändern 18', 19' begrenzt. Die Öffnungsränder 18', 19' liegen zur Verbesserung der Einströmung in die Kokille K schräg zur horizontalen bzw. schräg zur vertikalen Längsachse A. Dabei verlaufen die der Mitte bzw. der Längsachse A nahen Öffnungsränder 18' weniger steil als die weiter außen liegenden Öffnungsränder 19' (vgl. Figur 1). Dadurch ist die gleichmäßige Schmelzenverteilung in der Kokille K verbessert, auch wenn der untere Formstein 5 der Länge L der Kokille K nicht besonders nahekommt.The lower molded block 5 has a plurality of
In Figur 3 sind verschiedene Querschnittsformen der Gestaltung des Strömungsquerschnittes 13 des unteren Formsteins 5 gezeigt. Die im unteren Formtein 5 gestalteten Strömungskanäle können danach mit unterschiedlichen Durchmessern kreisförmig oder trapezförmig sein. Auch andere Querschnittsformen sind möglich.FIG. 3 shows various cross-sectional shapes of the design of the
Zwischen dem unteren Ende 10 und dem oberen Ende 11 sowie dem unteren Ende 15 und dem oberen Ende 16 der Formsteine 3, 4, 5 ist jeweils eine Dichtung 20 vorgesehen. Diese besteht aus einem Ringkanal 21 im jeweils oberen Ende 11 bzw. 16 der Formsteine 4 bzw. 5 und einem kompressiblen Dichtring 22, der oberhalb des Ringkanals 21 zwischen die Enden eingelegt ist sowie einen kompressiblen Dichtring 23, der unterhalb des Ringkanals 21 zwischen den Enden eingelegt ist. Die Dichtringe 22, 23 können aus einem keramischen Fasermaterial bestehen und auch miteinander verbunden sein. An den Ringkanal 21 ist jeweils eine Gasleitung 24 angeschlossen, die unter dem Druck eines Inertgases steht.A
Der Inertgasdruck läßt sich durch eine Anzeigeeinrichtung überwachen, so daß eine Undichtigkeit aufgrund des Druckabfalls festgestellt werden kann.The inert gas pressure can be monitored by a display device so that a leak due to the pressure drop can be determined.
Der mittlere Formstein 4 ist zusammen mit dem unteren Formstein 5 gegenüber dem oberen Formstein 3 um die Längsachse A verschwenkbar, weil die Enden 10, 11 rotationssymmetrisch ineinander eingreifen.The middle shaped
Am unteren Formstein 5 bestehen nach außen vorstehende Flächen 25 oberhalb der Eintauchzone 8. Diese Flächen 25 können von einer Haltevorrichtung 26 mittels Winkeln 27 untergriffen werden. Dadurch ist es möglich, die drei Formsteine 3, 4, 5 des Eintauchausgusses 1 im Betrieb sicher zusammenzuhalten, ohne daß im Bereich der Enden 10, 11; 15, 16 besondere axial wirkende Verbindungsmittel vorgesehen sind. Diese Haltevorrichtung 26 gestattet auch, den Eintauchausguß 1 sicher in die Kokille 1 einzuführen, in dieser zu halten und aus dieser herauszufahren. Außerdem ist durch diese Haltevorrichtung 26 auch das Auswechseln einzelner Formsteine 3, 4, 5 leicht möglich.On the lower molded block 5 there are outwardly projecting
Die Formsteine 3, 4, 5 können aus unterschiedlichen feuerfesten keramischen Materialien bestehen und in unterschiedlichen Verfahren hergestellt sein.The shaped
Beispielsweise kann der obere Formstein 3 aus einem Al2O3-C bestehen und in einem isostatischen Verfahren hergestellt sein. der mittlere Formstein 4 kann aus Al2O3 bestehen und in einem anderen Verfahren hergestellt sein. Der untere Formstein 5 kann aus ZrO2 hergestellt sein.For example, the upper molded
Claims (9)
- Immersion nozzle, particularly for thin slab casting, which is divided into an upper and a lower section, the upper section broadening towards the lower section in one longitudinal sectional plane and tapering towards the lower section in a longitudinal sectional plane perpendicular thereto and the lower section defining an immersion zone, characterised in that each of the sections (6, 7) is constituted by at least one separate moulded brick (3, 4; 5), the moulded bricks (3, 4, 5) engaging within one another at their ends (10, 11; 15, 16) directed towards one another and a seal (20) being arranged between the engaging ends (10, 11; 15, 16) of the moulded bricks (3, 4, 5).
- Immersion nozzle as claimed in Claim 1, characterised in that the upper section (6) is defined by two separate moulded bricks (3, 4), one moulded brick (3) defining a tubular inlet passage (9) for the molten metal and the other moulded brick (4) defining a flow compartment (12), which tapers downwardly in one longitudinal sectional plane and broadens downwardly in a longitudinal sectional plane perpendicular thereto.
- Immersion nozzle as claimed in Claim 1 or 2, characterised in that the ends (10, 11; 15, 16) engage conically within one another.
- Immersion nozzle as claimed in one of the preceding claims, characterised in that the upper moulded brick (3, 4) engages in the lower moulded brick (4, 5).
- Immersion nozzle as claimed in one of the preceding claims, characterised in that the lower moulded brick (5) defining the immersion zone (8) has longitudinal webs (17) in its flow cross-section (13).
- Immersion nozzle as claimed in one of the preceding claims, characterised in that the lower moulded brick (5) defines downwardly open outlet openings (18).
- Immersion nozzle as claimed in one of the preceding claims, characterised in that the lower moulded brick (5) defines opening edges (18', 19') extending obliquely to the horizontal.
- Immersion nozzle as claimed in one of the preceding claims, characterised in that the lower moulded brick (5) has outwardly projecting surfaces (25), below which a mounting device (26) may engage.
- Immersion nozzle as claimed in one of the preceding claims, characterised in that the seal (20) includes an annular passage (21) and compressible sealing rings (22, 23) adjacent and above and below it.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4320723A DE4320723A1 (en) | 1993-06-23 | 1993-06-23 | Immersion spout |
DE4320723 | 1993-06-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0630712A1 EP0630712A1 (en) | 1994-12-28 |
EP0630712B1 true EP0630712B1 (en) | 1996-10-02 |
Family
ID=6490950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94104560A Expired - Lifetime EP0630712B1 (en) | 1993-06-23 | 1994-03-23 | Immersion nozzle |
Country Status (5)
Country | Link |
---|---|
US (1) | US5429283A (en) |
EP (1) | EP0630712B1 (en) |
JP (1) | JPH079097A (en) |
KR (1) | KR950000266A (en) |
DE (2) | DE4320723A1 (en) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1267284B1 (en) * | 1994-08-08 | 1997-01-28 | Danieli Off Mecc | CONTINUOUS CASTING UNLOADER |
USD384484S (en) * | 1995-03-17 | 1997-09-30 | Deguisa, S.A. | Nozzle for tapping containers |
DE19512208C1 (en) * | 1995-03-21 | 1996-07-18 | Mannesmann Ag | Immersed spout for pouring metal |
JP3096635B2 (en) * | 1996-03-29 | 2000-10-10 | 住友金属工業株式会社 | Flat continuous casting nozzle |
DE19623787C2 (en) * | 1996-06-04 | 1998-07-02 | Mannesmann Ag | Method and device for pouring steel from a dip spout |
DE19628512C1 (en) * | 1996-07-05 | 1997-09-04 | Mannesmann Ag | Metal strip hot dip coating unit |
AU727845B2 (en) * | 1996-07-29 | 2001-01-04 | Mannesmann Aktiengesellschaft | Immersion nozzle for pouring molten metal (joint point) |
FR2763524A1 (en) * | 1997-05-23 | 1998-11-27 | Vesuvius France Sa | Molten metal continuous casting installation for production of thin slabs or strip |
DE19724232C2 (en) * | 1997-06-03 | 1999-04-15 | Mannesmann Ag | Method and device for producing slabs |
DE19738385C2 (en) * | 1997-09-03 | 2000-02-24 | Schloemann Siemag Ag | Immersion pouring tube for introducing melt from a casting or intermediate container into a mold |
DE19758071C1 (en) * | 1997-12-30 | 1999-08-26 | Didier Werke Ag | Joint for holding together sections of a channel used, in particular, for pouring of liquid metals |
KR100450438B1 (en) * | 2001-11-09 | 2004-10-01 | 조선내화 주식회사 | sealing material found between of lower nozzle & submerged entry nozzle for continuous casting |
KR100817132B1 (en) * | 2002-03-15 | 2008-03-27 | 엘지.필립스 엘시디 주식회사 | Liquid crystal dispensing apparatus |
DE102008058647A1 (en) | 2008-11-22 | 2010-06-10 | Refractory Intellectual Property Gmbh & Co. Kg | submerged nozzle |
EP2792433A1 (en) * | 2013-04-16 | 2014-10-22 | Refractory Intellectual Property GmbH & Co. KG | A sealing system preferably in a slide gate on the spout of a metallurgical vessel and a spout casing |
KR101722951B1 (en) * | 2015-08-03 | 2017-04-04 | 주식회사 포스코 | Immersion nozzle |
EP3332891A1 (en) * | 2016-12-12 | 2018-06-13 | ABB Schweiz AG | An assembly for a metal-making process |
CN109382506B (en) * | 2018-11-20 | 2020-10-23 | 山东钢铁股份有限公司 | Method for reducing nitrogen increase of molten steel in continuous casting process |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1239458A (en) * | 1968-07-31 | 1971-07-14 | ||
US3934638A (en) * | 1971-02-08 | 1976-01-27 | Inland Steel Company | Continuous casting process |
DE3704326A1 (en) * | 1987-02-12 | 1988-08-25 | Didier Werke Ag | Discharge element |
DE3709188A1 (en) * | 1987-03-20 | 1988-09-29 | Mannesmann Ag | POURING PIPE FOR METALLURGICAL VESSELS |
ATE54591T1 (en) * | 1987-04-07 | 1990-08-15 | Mueller Weingarten Maschf | SUCTION PIPE FOR VACUUM DIE CASTING MACHINE. |
US5205343A (en) * | 1989-06-03 | 1993-04-27 | Sms Schloemann-Siemag Aktiengesellschaft | Pouring tube for feeding molten steel into a continuous casting mold |
DE4024520A1 (en) * | 1990-08-02 | 1992-02-06 | Didier Werke Ag | CONNECTION BETWEEN THE OUTLET OF A METALLURGICAL VESSEL AND A PROTECTIVE PIPE OR DIP SPOUT |
-
1993
- 1993-06-23 DE DE4320723A patent/DE4320723A1/en not_active Withdrawn
-
1994
- 1994-03-23 EP EP94104560A patent/EP0630712B1/en not_active Expired - Lifetime
- 1994-03-23 DE DE59400755T patent/DE59400755D1/en not_active Expired - Fee Related
- 1994-05-04 KR KR1019940009820A patent/KR950000266A/en not_active Application Discontinuation
- 1994-05-31 US US08/251,313 patent/US5429283A/en not_active Expired - Fee Related
- 1994-06-02 JP JP6154088A patent/JPH079097A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
DE59400755D1 (en) | 1996-11-07 |
KR950000266A (en) | 1995-01-03 |
EP0630712A1 (en) | 1994-12-28 |
JPH079097A (en) | 1995-01-13 |
US5429283A (en) | 1995-07-04 |
DE4320723A1 (en) | 1995-01-05 |
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