EP0267366B1 - Refractory lining, especially for tundish covers - Google Patents

Refractory lining, especially for tundish covers Download PDF

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Publication number
EP0267366B1
EP0267366B1 EP87109901A EP87109901A EP0267366B1 EP 0267366 B1 EP0267366 B1 EP 0267366B1 EP 87109901 A EP87109901 A EP 87109901A EP 87109901 A EP87109901 A EP 87109901A EP 0267366 B1 EP0267366 B1 EP 0267366B1
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EP
European Patent Office
Prior art keywords
lining
heat shield
cover
refractory
cover plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP87109901A
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German (de)
French (fr)
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EP0267366A1 (en
Inventor
Laurenz Keisers
Kurt Engelmann
Rainer Janssen
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Didier Werke AG
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Didier Werke AG
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Priority to AT87109901T priority Critical patent/ATE53520T1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/02—Linings

Definitions

  • the invention relates to a refractory lining for the lid of metallurgical vessels, in particular for a heat distributor used in continuous casting plants, the inside of which is lined with fireproof material with burner openings, with a cover plate and insulation.
  • Lids of this type carry either a refractory concrete layer on the fire side or a fire-resistant cladding which can be bricked up or also constructed like a fire blanket.
  • What is difficult with all known designs is the complicated and time-consuming disassembly and assembly when renewing the cover infeed, which due to its compact structure is usually exposed to high thermal stresses during operation and is prematurely destroyed by cracks or poses ongoing repair problems.
  • the thermal insulation leaves something to be desired.
  • the object of the present invention is to facilitate handling during repairs and new deliveries with improved operating behavior and increased thermal insulation by means of an improved structure and arrangement of the refractory lining in the lid.
  • a heat shield which is removable and planarly movable is arranged on the cover plate by means of supporting members and the heat shield is sealed against the cover plate by means of an elastic peripheral seal.
  • the invention provides a support plate clad on the fire side with refractory material with support pins which are mounted so as to be movable in a plane in the base, penetrate the insulation and are suspended on the cover plate, the pins being held with a collar in a tolerance chamber of the base.
  • This construction gives the heat shield sufficient plan mobility with simple constructional means and creates optimal conditions for handling, especially when the supporting bolts are advantageously detachably suspended from the sleeve of the cover plate and pipe sockets are provided on this plate, which limit recesses in the insulation and the arrangement of supporting bolts and base surround.
  • the refractory cover lining is made of ceramic fiber packs, while the heat shield has a refractory concrete layer anchored to the support plate with the interposition of a ceramic fiber mat by pins.
  • the refractory concrete layer can be removed from the support plate together with the fiber mat if necessary.
  • burner stones arranged on the heat shield engage in collars fastened around the burner openings on the cover plate and lined with ceramic fiber material.
  • the basic assignment of the burner blocks to the heat shield contributes to further simplifying the maintenance of the cover, especially if, preferably, each burner block is detachably held by at least two opposite locations on the peripheral surface of a holding device arranged on the supporting plate in the refractory concrete layer, so that after Breaking up the refractory concrete layer at said locations each burner block on the installed or removed heat shield is replaceable.
  • refractory protective sleeves are provided on the heat shield, which surround these supports in the case of a cover with support supports provided in an emptying gap.
  • the heat shield is divided longitudinally into shield sections with their own peripheral seals. This is a particularly advantageous embodiment because the individual sections of the heat shield can be replaced independently of one another and it is possible to adapt the size dimensions of the sections to existing means of transport.
  • the heat shield and the shield portions are provided, the refractory concrete layer enclosing missionszargen on the support plate, on which sealing cords are inserted from ceramic fiber, resulting in a simple but we- "effect full sealing.
  • V denotes a distributor, also known as a heat distributor or tundish, which serves to feed continuous casting molds with molten steel and is provided on one long side with a pouring core 1, and has a metallic jacket 2 and one has fireproof lining 3. Furthermore, a row of spouts 4 with inlet connections 5 and external slide closures 6 are provided in the center of the distributor base, by means of which the melt drainage through pouring tubes, not shown, to the individual molds of the continuous casting installation can be regulated.
  • a distributor also known as a heat distributor or tundish
  • the distributor V is covered with a cover W lined with insulating and refractory materials.
  • This has a mounting frame 7 and a cover plate 10 provided with burner openings 8 and a pouring opening 9, on which a profile rail 12 including a circumferential cooling 11 and reinforcing is provided.
  • the cover W has insulation 13, which is protected by a heat shield H, which consists of a heat-resistant support plate 15 clad on the fire side with a fire-concrete layer 14 and is held detachably on the cover plate 10 by means of support bolts 16 attached thereto.
  • the insulation penetrating burner stones 18 are arranged on the heat shield H, whereas an opening lining 19 made of unshaped refractory material is provided at the pouring opening 9 and extends over the pouring core 1.
  • the cover W has on the long side, on which the pouring core 1 is located, an emptying gap 20 with refractory-clad cover supports 21 resting on the distributor V, around which the board surface 22 on which the cover W is seated has a refractory protective layer 23 wears.
  • stopper 25 which can be clamped onto the distributor by means of hydraulic means (not shown) and which can be clamped onto the distributor, can be inserted into the burner blocks 18 to close the burner openings 8.
  • the gap 20 serves to free the distributor V parked on the parking space outside the continuous casting installation by tilting about its longitudinal axis from residual melt containing predominantly slag in order to avoid freezing in the ceramic of the slide closures 6. Also on the parking space, the distributor V is heated up before it is used in the continuous casting installation, for which purpose 8 burners are inserted into the burner openings which are otherwise closed by the plugs 25. For the rest, as part of the management of a continuous caster, a further cover with burners fixed to the burner openings 8 is available. If emptying is no longer guaranteed - the dwell time is too long - you have to tilt back to the starting position and release the lock. Now a "second cover" in the waiting position is put on and hydraulically clamped again.
  • This "second cover” is the same as the other, with the exception of the high-performance burners located there.
  • These high-performance burners are arranged in such a way that they are located on the distributor channel, just above the tundish sliding locks (sliding lock heating). These six high-performance burners are able to heat the interior to over 1500 ° C and liquefy the residual steel cooled there.
  • a sealing braid 26 made of ceramic fiber material is introduced into the gap 20 ; which is only removed again before the distributor V is emptied.
  • FIGS. 6 to 12. 6 to 9 The more detailed design of the refractory lining of the cover W can be seen in FIGS. 6 to 12. 6 to 9, the insulation 13 composed of ceramic fiber packs 30 is attached to the inside of the cover plate 10, which has been tried and tested with profiled rails 12, leaving pipe stubs 31 attached to the cover plate 10 free, through which the support bolts 16 of the removable heat shield H engage for wedging plug sleeves 32 fastened to the cover plate 10.
  • the perforated support plate 15 of the heat shield H has hollow-cylindrical bases 34 on the upper side which fit into the pipe socket 31 and in which the support bolts 16 are movably mounted in a plane plane.
  • the support plate 15 is equipped with expansion pins 35 in a checkerboard manner, for holding a ceramic fiber mat 36, an oil paper or plastic film 37 and the refractory concrete layer 14, the positions 36, 37 and 14 being fitted by a peripheral frame 39 of the plate 15. If the length W of the cover W is longer, the heat shield H according to FIG. 8 is subdivided lengthwise into individually interchangeable and interchangeable shield sections 40, which in FIG.
  • each support bolt 16 is supported by a collar 42 in a tolerance chamber 44 of the base 34 having a cleaning opening 43, the cover plate 45 of which is welded when the support bolt 16 is inserted.
  • bases 34 are shortened by the gap width in the area of the gap 20. There, in the gap area, the thickness of the insulation 13 is reduced accordingly and the mounting frame 7 of the cover W is replaced by the supports 21 protected with refractory protective sleeves 47 (cf. FIG. 6).
  • the sleeves 47 which are advantageously prefabricated from refractory concrete, are part of the heat shield H or the shield sections 40 and, when the cover W is placed on the board surface 22 of the distributor V, engage in recesses 48 in the protective layer 23 covering this surface in the region of the gap 2, with a seal being provided ceramic fiber cord 49.
  • the opening lining 19 similar to the heat shield H, consists of a fiber mat 36 of a film 37 and of refractory concrete 14, which also includes the filling side of the pouring opening 9.
  • the burner openings 8 are unevenly constructed, their collar plates 55, which are oval in outline, fastened to the cover plate 10 and lined with ceramic fiber material 54, accommodate the burner blocks 18, as have a groove 57 on the oval sides 56, into which a retaining tab 58 fits a holding device 59 ( Figure 11).
  • the devices 59 surrounded by the refractory concrete layer, are arranged on the support plate 15 of the heat shield H, in that a sheet metal web 60 fastened there at a distance around the oval sides 56 in cross sleeves 61 carries pins 62 with split pins 63, which pass through holes 64 in the support plate 15 and the retaining tab 58 inserted and spread to connect the two parts.
  • each burner block 18 can be closed with the plug 25 mentioned at the beginning, which, according to FIG. Based on the heat shield H on the expansion pins 35 of the reinforcement pot 56, this is formed by a ceramic fiber mat 36, a film 37 and a refractory concrete layer 38.
  • the described cover W with its emptying gap 20 is suitable for special operating conditions.
  • the lining according to the invention applies to lids which have no lateral emptying gap.
  • the lining according to the invention also does justice to metallurgical vessels which are not used in continuous casting plants but are subject to similar operating conditions.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The refractory lining of a cover for tundishes in continuous-casting installations is improved substantially by separation into an insulation (13) and a heatshield (H) which is arranged movably in one plane and removably on supporting members (16, 34), with a circumferential gasket (41) being inserted. This makes it easier, above all, to carry out assembly and repair work. <IMAGE>

Description

Die Erfindung betrifft eine feuerfeste Auskleidung für Deckel metallurgischer Gefäße, insbesondere für einen bei Stranggießanlagen eingesetzten Warmverteiler, dessen innenseitig, mit feuerfestem Material ausgekleideter Deckel mit Brenneröffnungen, mit einem Deckelblech und Isolierungen versehen ist.The invention relates to a refractory lining for the lid of metallurgical vessels, in particular for a heat distributor used in continuous casting plants, the inside of which is lined with fireproof material with burner openings, with a cover plate and insulation.

Derartige Deckel tragen feuerseitig entweder eine Feuerbetonschicht oder eine feuerfeste Verkleidung, die vermauert oder auch feuerdeckenartig aufgebaut sein kann. Schwierig ist bei allen bekannten Ausführungen die umständliche und aufwendige Demontage und Montage beim Erneuern der Deckelzustellung, die im Betrieb infolge ihres kompakten Aufbaues meist hohen Wärmespannungen ausgesetzt ist und durch Rißbildungen frühzeitig zerstört wird bzw. fortwährende Reparaturprobleme aufwirft. Außerdem läßt die Wärmedämmung zu wünschen übrig.Lids of this type carry either a refractory concrete layer on the fire side or a fire-resistant cladding which can be bricked up or also constructed like a fire blanket. What is difficult with all known designs is the complicated and time-consuming disassembly and assembly when renewing the cover infeed, which due to its compact structure is usually exposed to high thermal stresses during operation and is prematurely destroyed by cracks or poses ongoing repair problems. In addition, the thermal insulation leaves something to be desired.

Ein solcher Deckel ist in dem Dokument "Patent Abstracts of Japan", Band 7, Nr. 16 (M-187) [1161] beschrieben. Der dort beschriebene Deckel weist ein Deckelblech und eine Isolierung auf. Feuerseitig sind Bodenplatten angeordnet.Such a lid is described in the document "Patent Abstracts of Japan", Volume 7, No. 16 (M-187) [1161]. The cover described there has a cover plate and insulation. Base plates are arranged on the fire side.

Aufgabe vorliegender Erfindung ist es, durch eine verbesserte Struktur und Anordnung der feuerfesten Auskleidung im Deckel Handhabungen bei Reparaturen und Neuzustellungen zu erleichtern bei verbessertem Betriebsverhalten und erhöhter Wärmedämmung.The object of the present invention is to facilitate handling during repairs and new deliveries with improved operating behavior and increased thermal insulation by means of an improved structure and arrangement of the refractory lining in the lid.

Die gestellte Aufgabe wird gemäß der Erfindung dadurch gelöst, daß im Deckel an seiner Unterseite vor einer Isolierung ein am Deckelblech mittels Traggliedern abnehmbar und plan beweglich gehaltener Hitzeschild angeordnet ist und der Hitzeschild gegen dem Deckelblech mittels einer elastischen Umfangsdichtung abgedichtet ist. Dadurch ergibt sich eine Auskleidung mit getrennten, isolierenden und feuerfesten Zustellungen. Letztere in Form eines Hitzeschildes, der unabhängig von der Isolierung vorgefertigt und infolge des in seiner Anordnung vorgesehenen plan beweglichen Spiels zügig ein- und ausgebaut werden kann. Darüberhinaus kompensiert die Auskleidung Wärmespannungen hervorragend und ist bestens wärmedämmend.The object is achieved according to the invention in that in the cover on its underside in front of an insulation, a heat shield which is removable and planarly movable is arranged on the cover plate by means of supporting members and the heat shield is sealed against the cover plate by means of an elastic peripheral seal. This results in a lining with separate, insulating and refractory linings. The latter in the form of a heat shield, which is prefabricated independently of the insulation and can be quickly installed and removed as a result of the planar movable play provided in its arrangement. In addition, the lining excellently compensates for thermal tensions and is excellent thermal insulation.

Bezüglich des Hitzeschildes sieht die Erfindung ein feuerseitig mit feuerfestem Material verkleidetes Tragblech mit in Sockeln plan beweglich lagernden, die Isolierung durchdringenden und am Deckelblech aufgehängten Tragbolzen vor, wobei die Bolzen mit einem Bund in einer Toleranzkammer der Sockel gehalten sind. Diese Konstruktion vermittelt dem Hitzeschild ausreichende Planbeweglichkeit mit einfachen baulichen Mitteln und schafft optimale Bedingungen für Hantierungen, insbesondere dann, wenn vorteilhaft die Tragbolzen an Steckhülsen des Deckelbleches lösbar aufgehängt und an diesem Blech Rohrstutzen vorgesehen sind, welche Ausnehmungen in der Isolierung begrenzen und die Anordnung aus Tragbolzen und Sockel umgeben.With regard to the heat shield, the invention provides a support plate clad on the fire side with refractory material with support pins which are mounted so as to be movable in a plane in the base, penetrate the insulation and are suspended on the cover plate, the pins being held with a collar in a tolerance chamber of the base. This construction gives the heat shield sufficient plan mobility with simple constructional means and creates optimal conditions for handling, especially when the supporting bolts are advantageously detachably suspended from the sleeve of the cover plate and pipe sockets are provided on this plate, which limit recesses in the insulation and the arrangement of supporting bolts and base surround.

Vorteilhaft besteht in näherer Ausbildung der feuerfesten Deckelauskleidung die Isolierung aus keramischen Faserpacken, während der Hitzeschild eine am Tragblech unter Zwischenfügen einer keramischen Fasermatte durch Stifte verankerte Feuerbetonschicht aufweist. Dadurch läßt sich die Feuerbetonschicht im Bedarfsfall gemeinsam mit der Fasermatte anstandslos vom Tragblech entfernen.Advantageously, the refractory cover lining is made of ceramic fiber packs, while the heat shield has a refractory concrete layer anchored to the support plate with the interposition of a ceramic fiber mat by pins. As a result, the refractory concrete layer can be removed from the support plate together with the fiber mat if necessary.

Hinsichtlich der im Deckel vorgesehenen Brenneröffnungen wird gemäß der Erfindung vorgeschlagen, daß am Hitzeschild angeordnete Brennersteine in um die Brenneröffnungen am Deckelblech befestigte, mit keramischem Fasermaterial ausgefütterte Kragen greifen. Vor allem die vorgenommene grundsätzliche Zuordnung der Brennersteine zum Hitzeschild trägt zur weiteren Vereinfachung der Wartung des Deckels bei, zumal, wenn vorzugsweise jeder Brennerstein an wenigstens zwei gegenüberliegenden Stellen der Umfangsfläche von je einer am Tragblech in der Feuerbetonschicht angeordneten Haltevorrichtung lösbar gehalten ist, so daß nach Aufbrechen der Feuerbetonschicht an den besagten Stellen jeder Brennerstein am ein-oder ausgebauten Hitzeschild austauschbar ist.With regard to the burner openings provided in the cover, it is proposed according to the invention that burner stones arranged on the heat shield engage in collars fastened around the burner openings on the cover plate and lined with ceramic fiber material. Above all, the basic assignment of the burner blocks to the heat shield contributes to further simplifying the maintenance of the cover, especially if, preferably, each burner block is detachably held by at least two opposite locations on the peripheral surface of a holding device arranged on the supporting plate in the refractory concrete layer, so that after Breaking up the refractory concrete layer at said locations each burner block on the installed or removed heat shield is replaceable.

Ferner sind gemäß der Erfindung am Hitzeschild feuerfeste Schutzhülsen vorgesehen, die bei einem Deckel mit in einem Entleerungsspalt vorgesehenen Auflagestützen, diese Stützen umgeben. Eine solche Hülsenanordnung bewirkt eine weitere Verbesserung der feuerfesten Auskleidung.Furthermore, according to the invention, refractory protective sleeves are provided on the heat shield, which surround these supports in the case of a cover with support supports provided in an emptying gap. Such a sleeve arrangement brings about a further improvement in the refractory lining.

Ein weiteres Merkmal der Erfindung besteht darin, daß der Hitzeschild in Schildabschnitte mit eigenen Umfangsdichtungen längs unterteilt ist. Das ist eine besondere vorteilhafte Ausführung, weil die einzelnen Abschnitte des Hitzeschildes unabhängig voneinander ersetzt werden können und es möglich ist, die Größenabmessungen der Abschnitte vorhandenen Transportmitteln anzupassen.Another feature of the invention is that the heat shield is divided longitudinally into shield sections with their own peripheral seals. This is a particularly advantageous embodiment because the individual sections of the heat shield can be replaced independently of one another and it is possible to adapt the size dimensions of the sections to existing means of transport.

Zweckmäßig sind am Tragblech des Hitzeschildes bzw. der Schildabschnitte die Feuerbetonschicht einfassende Umfangszargen vorgesehen, an denen Abdichtungsschnüre aus keramischer Faser eingefügt werden, was eine einfache, aber wir- "kungsvolle Abdichtung ergibt.Suitably, the heat shield and the shield portions are provided, the refractory concrete layer enclosing Umfangszargen on the support plate, on which sealing cords are inserted from ceramic fiber, resulting in a simple but we- "effect full sealing.

Die Erfindung ist nachstehend anhand der Zeichnung an einem Ausführungsbeispiel erläutert.

  • Figur 1 zeigt in vereinfachter, schematischer Darstellung einen teilweise im Schnitt dargestellten Verteiler mit aufgesetztem Deckel im Aufriß,
  • Figur 2 die Draufsicht auf den Deckel,
  • Figur 3 einen Schnitt nach der Linie A-A der Figur 2, während
  • Figuren 4 und 5 dergleichen Schnitte nach den Linien E-E und C-C veranschaulichen.
  • Figuren 6 bis 9 sind in größerem Maßstab gehaltene Schnitte, ebenfalls nach den Linien B-B, C-C sowie D-D und E-E der Figur 2, indessen die
  • Figuren 10 bis 12 Einzelheiten der Figur 9 darstellen.
The invention is explained below with reference to the drawing using an exemplary embodiment.
  • FIG. 1 shows a simplified, schematic illustration of a distributor, partly in section, with an attached cover in elevation,
  • FIG. 2 shows the top view of the lid,
  • Figure 3 is a section along the line AA of Figure 2, while
  • Figures 4 and 5 illustrate similar sections along lines EE and CC.
  • Figures 6 to 9 are sections on a larger scale, also along the lines BB, CC and DD and EE of Figure 2, but the
  • Figures 10 to 12 show details of Figure 9.

In Figur 1 bedeutet V einen zum Beschicken von Stranggießkokillen mit Stahlschmelze dienenden, an einer Längsseite mit einem Eingießerker 1 ausgestatteten Verteiler, auch Warmverteiler oder Tundish genannt, der einen metallischen Mantel 2 und eine feuerfeste Auskleidung 3 hat. Ferner sind längsmittig im Verteilerboden eine Reihe von Ausgüssen 4 mit Einlaufstutzen 5 sowie außenliegenden Schieberverschlüssen 6 vorgesehen, mit denen der Schmelzeabfluß durch nicht dargestellte Gießrohre zu den einzelnen Kokillen der Stranggießanlage geregelt werden kann.In FIG. 1, V denotes a distributor, also known as a heat distributor or tundish, which serves to feed continuous casting molds with molten steel and is provided on one long side with a pouring core 1, and has a metallic jacket 2 and one has fireproof lining 3. Furthermore, a row of spouts 4 with inlet connections 5 and external slide closures 6 are provided in the center of the distributor base, by means of which the melt drainage through pouring tubes, not shown, to the individual molds of the continuous casting installation can be regulated.

Abgedeckt ist der Verteiler V mit einem mit Isolier- und Feuerfestmaterialien ausgekleideten Deckel W. Dieser hat einen Aufsetzrahmen 7 und ein mit Brenneröffnungen 8 und einer Eingießöffnung 9 versehenes Deckelblech 10, an dem eine, eine Umfangskühlung 11 einschließende und armierende Profilschiene 12 ist vorgesehen ist. Innenseitig weist der Deckel W eine Isolierung 13 auf, die durch einen Hitzeschild H geschützt ist, der aus einem feuerseitig mit einer Feuerbetonschicht 14 verkleideten, hitzebeständigen Tragblech 15 besteht und mittels daran angebrachter Tragbolzen 16 am Deckelblech 10 abnehmbar gehalten ist. Im Bereich der Brenneröffnungen 8 sind am Hitzeschild H die Isolierung durchdringende Brennersteine 18 angeordnet, wogegen an der Eingießöffnung 9 eine über den Eingießerker 1 sich erstreckende Öffnungsauskleidung 19 aus ungeformtem feuerfesten Material vorgesehen ist. Des weiteren hat der Deckel W an der Längsseite, an der sich der Eingießerker 1 befindet, einen Entleerungsspalt 20 mit auf dem Verteiler V aufliegenden, feuerfest verkleideten Deckelstützen 21, um die herum die Boardfläche 22, auf der der Deckel W aufsitzt, eine feuerfeste Schutzschicht 23 trägt. Außerdem gehören zu dem mit nicht gezeigten hydraulischen Mitteln auf den Verteiler festklemmbaren Deckel W an Hantierungsschäften 24 transportierbare Stopfen 25, die zum Verschließen der Brenneröffnungen 8 in die Brennersteine 18 einbringbar sind.The distributor V is covered with a cover W lined with insulating and refractory materials. This has a mounting frame 7 and a cover plate 10 provided with burner openings 8 and a pouring opening 9, on which a profile rail 12 including a circumferential cooling 11 and reinforcing is provided. On the inside, the cover W has insulation 13, which is protected by a heat shield H, which consists of a heat-resistant support plate 15 clad on the fire side with a fire-concrete layer 14 and is held detachably on the cover plate 10 by means of support bolts 16 attached thereto. In the area of the burner openings 8, the insulation penetrating burner stones 18 are arranged on the heat shield H, whereas an opening lining 19 made of unshaped refractory material is provided at the pouring opening 9 and extends over the pouring core 1. Furthermore, the cover W has on the long side, on which the pouring core 1 is located, an emptying gap 20 with refractory-clad cover supports 21 resting on the distributor V, around which the board surface 22 on which the cover W is seated has a refractory protective layer 23 wears. In addition, stopper 25, which can be clamped onto the distributor by means of hydraulic means (not shown) and which can be clamped onto the distributor, can be inserted into the burner blocks 18 to close the burner openings 8.

Der Spalt 20 dient dazu, den auf dem Abstellplatz außerhalb der Stranggießanlage abgestellten Verteiler V durch Kippen um seine Längsachse von überwiegend Schlacke enthaltender Restschmelze zu befreien, um Einfrierungen in der Keramik der Schieberverschlüsse 6 zu vermeiden. Ebenfalls auf dem Abstellplatz wird der Verteiler V vor seinem Einsatz in der Stranggießanlage aufgeheizt, wozu in die ansonsten durch die Stopfen 25 verschlossenen Brenneröffnungen 8 Brenner eingefahren werden. Im übrigen steht im Rahmen der Wirtschaftsführung einer Stranggießanlage ein weiterer Deckel mit an die Brenneröffnungen 8 festmontierten Brennern bereit. Sollte eine Entleerung nicht mehr gewährleistet sein - die Verweilzeit ist zu groß -, muß in Ausgangsposition zurückgekippt und die Arretierung gelöst werden. Jetzt wird ein in Warteposition dort befindlicher "zweiter Deckel" aufgesetzt und wieder hydraulisch festgeklemmt. Dieser "zweite Deckel" ist gegenüber dem anderen gleich, mit Ausnahme der dort befindlichen Hochleistungsbrenner. Diese Hochleistungsbrenner sind so angeordnet, daß sie sich bei der Deckelauflage auf die Verteilerrinne, genau oberhalb der Tundish-Schiebeverschlüsse befinden (Schiebeverschlußheizung). Diese sechs Hochleistungsbrenner sind in der Lage, den Innenraum auf über 1500°C zu erwärmen und den dort erkalteten Reststahl wieder zu verflüssigen. Nach dem Aufheizen des Verteilers V wird in den Spalt 20 ein Dichtungszopf 26 (siehe Figur 9) aus keramischem Fasermaterial eingebracht; der erst vor der Entleerung des Verteilers V wieder entfernt wird.The gap 20 serves to free the distributor V parked on the parking space outside the continuous casting installation by tilting about its longitudinal axis from residual melt containing predominantly slag in order to avoid freezing in the ceramic of the slide closures 6. Also on the parking space, the distributor V is heated up before it is used in the continuous casting installation, for which purpose 8 burners are inserted into the burner openings which are otherwise closed by the plugs 25. For the rest, as part of the management of a continuous caster, a further cover with burners fixed to the burner openings 8 is available. If emptying is no longer guaranteed - the dwell time is too long - you have to tilt back to the starting position and release the lock. Now a "second cover" in the waiting position is put on and hydraulically clamped again. This "second cover" is the same as the other, with the exception of the high-performance burners located there. These high-performance burners are arranged in such a way that they are located on the distributor channel, just above the tundish sliding locks (sliding lock heating). These six high-performance burners are able to heat the interior to over 1500 ° C and liquefy the residual steel cooled there. After the distributor V has been heated, a sealing braid 26 (see FIG. 9) made of ceramic fiber material is introduced into the gap 20 ; which is only removed again before the distributor V is emptied.

Die nähere Ausgestaltung der feuerfesten Verkleidung des Deckels W ist aus den Figuren 6 bis 12 ersichtlich. Im einzelnen ist gemäß den Figuren 6 bis 9 innenseitig des mit Profilschienen 12 bewährten Deckelbleches 10 die aus keramischen Faserpacken 30 zusammengesetzte Isolierung 13 angebracht, unter Freilassen von am Deckelblech 10 befestigten Rohrstutzen 31, durch welche die Tragbolzen 16 des abnehmbaren Hitzeschildes H hindurchgreifen zur Ankeilung an am Deckelblech 10 befestigten Steckhülsen 32.The more detailed design of the refractory lining of the cover W can be seen in FIGS. 6 to 12. 6 to 9, the insulation 13 composed of ceramic fiber packs 30 is attached to the inside of the cover plate 10, which has been tried and tested with profiled rails 12, leaving pipe stubs 31 attached to the cover plate 10 free, through which the support bolts 16 of the removable heat shield H engage for wedging plug sleeves 32 fastened to the cover plate 10.

Wie insbesondere aus Figur 8 ersichtlich, hat das perforierte bzw. mit Entdampfungslöchern versehene Tragblech 15 des Hitzeschildes H oberseitig hohlzylindrische, in die Rohrstutzen 31 passende Sockel 34, in denen die Tragbolzen 16 in planer Ebene beweglich lagern. Unterseitig dagegen ist das Tragblech 15 mit Spreizstiften 35 schachbrettartig besetzt, zum Festhalten einer keramischen Fasermatte 36, einer Ölpapier- oder Kunststoffolie 37 sowie der Feuerbetonschicht 14, wobei die Positionen 36, 37 und 14 von einer Umfangszarge 39 des Bleches 15 eingepaßt sind. Bei größerer Längenabmessung des Deckels W ist der Hitzeschild H gemäß Figur 8 der Länge nach in einzeln hantier- und austauschbare Schildabschnitte 40 unterteilt, welche in Figur 8 der Einfachheit wegen dem besprochenen einstückigen Hitzeschild H entsprechende Bezugszeichen tragen. In diesem Sinne ist der Hitzeschild H bzw. sind die durch die Querteilung erhaltenen Schildabschnitte 40 an den Zargen 39 gegenüber dem Deckelblech bzw. untereinander mittels Umfangsdichtungen 41 aus keramischem Material abgedichtet.As can be seen in particular from FIG. 8, the perforated support plate 15 of the heat shield H, provided with evaporation holes, has hollow-cylindrical bases 34 on the upper side which fit into the pipe socket 31 and in which the support bolts 16 are movably mounted in a plane plane. On the other hand, the support plate 15 is equipped with expansion pins 35 in a checkerboard manner, for holding a ceramic fiber mat 36, an oil paper or plastic film 37 and the refractory concrete layer 14, the positions 36, 37 and 14 being fitted by a peripheral frame 39 of the plate 15. If the length W of the cover W is longer, the heat shield H according to FIG. 8 is subdivided lengthwise into individually interchangeable and interchangeable shield sections 40, which in FIG. 8 have corresponding reference numerals for simplicity because of the one-piece heat shield H discussed. In this sense, the heat shield H or the shield sections 40 obtained by the transverse division on the frames 39 are sealed off from the cover plate or from one another by means of peripheral seals 41 made of ceramic material.

Zwecks planbeweglicher Anordnung des Hitzeschildes H lagert jeder Tragbolzen 16 mit einem Bund 42 in einer Reinigungsöffnung 43 aufweisenden Toleranzkammer 44 des Sockels 34, dessen Deckscheibe 45 bei der Einbringung des Tragbolzens 16 verschweißt wird.For the purpose of a moveable arrangement of the heat shield H, each support bolt 16 is supported by a collar 42 in a tolerance chamber 44 of the base 34 having a cleaning opening 43, the cover plate 45 of which is welded when the support bolt 16 is inserted.

Gegenteilig zu den gleichlängigen Bolzen 16 gibt es neben den mehrheitlich vorgesehenen, unterhalb der Toleranzkammern 44 mit feuerfestem Granulat 46 gefüllten Sockeln 34 solche, die im Bereich des Spaltes 20 um die Spaltbreite verkürzt sind. Dort, im Spaltbereich, ist die Dicke der Isolierung 13 entsprechend verringert und der Aufsetzrahmen 7 des Deckels W durch die mit feuerfesten Schutzhülsen 47 geschützten Stützen 21 ersetzt (vgl. Figur 6). Die vorteilhaft aus Feuerbeton vorgefertigten Hülsen 47 sind Bestandteil des Hitzeschildes H bzw. der Schildabschnitte 40 und greifen beim Auflegen des Deckels W auf die Boardfläche 22 des Verteilers V in Ausnehmungen 48 der diese Fläche im Bereich des Spaltes 2 überziehenden Schutzschicht 23, wobei eine Abdichtung mit keramischer Faserkordel 49 erfolgt.In contrast to the bolts 16 of the same length, in addition to the majority of the bases 34, which are provided below the tolerance chambers 44 and are filled with refractory granules 46, bases 34 are shortened by the gap width in the area of the gap 20. There, in the gap area, the thickness of the insulation 13 is reduced accordingly and the mounting frame 7 of the cover W is replaced by the supports 21 protected with refractory protective sleeves 47 (cf. FIG. 6). The sleeves 47, which are advantageously prefabricated from refractory concrete, are part of the heat shield H or the shield sections 40 and, when the cover W is placed on the board surface 22 of the distributor V, engage in recesses 48 in the protective layer 23 covering this surface in the region of the gap 2, with a seal being provided ceramic fiber cord 49.

Aus Figur 7 wird die Ausbildung der Eingießöffnung 9 an einem am Deckelblech 10 befestigten Blechkragen 50 deutlich, an dessen Außenseite die Isolierung 13 endet, während der Hitzeschild H einen dem Kragenprofil entsprechenden Dt2.mchstich 51 hat. Innenseitig des Kragens 50 besteht die Offnungsauskleidung 19, ähnlich dem Hitzeschild H, aus einer Fasermatte 36 einer Folie 37 und aus Feuerbeton 14, der auch die Einfüllseite der Eingießöffnung 9 einschließt.7 shows the formation of the pouring opening 9 on a sheet metal collar 50 fastened to the cover plate 10, on the outside of which the Insulation 13 ends while the heat shield H has a Dt2.mchstich 51 corresponding to the collar profile. On the inside of the collar 50, the opening lining 19, similar to the heat shield H, consists of a fiber mat 36 of a film 37 and of refractory concrete 14, which also includes the filling side of the pouring opening 9.

Ungleich aufgebaut sind die Brenneröffnungen 8, deren im Umriß oval ausgebildete, am Deckelblech 10 befestigte und mit keramischem Fasermaterial 54 ausgefütterte Kragenbleche 55 die Brennersteine 18 aufnehmen, wie an den Ovalseiten 56 eine Nut 57 haben, in die eine Haltelasche 58 je einer Haltevorrichtung 59 hineinpaßt (Figur 11). Die Vorrichtungen 59 sind, von der Feuerbetonschicht umgeben, am Tragblech 15 des Hitzeschildes H disponiert, indem ein dort mit Abstand um die Ovalseiten 56 befestigter Blechsteg 60 in Quermuffen 61 Steckstifte 62 mit Splinten 63 trägt, die durch Bohrungen 64 des Tragbleches 15 und der Haltelasche 58 durchgesteckt und zur Verbindung beider Teile aufgespreizt sind. Demgemäß können nach Aufbrechen der Feuerbetonschicht 14 die Vorrichtungen 59 geöffnet und die Brennersteine 18 im Hitzeschild H ersetzt werden. Danach läßt sich der aufgebrochene Feuerbeton leicht erneuern. Jeder Brennerstein 18 ist bei entferntem Brenner mit dem eingangs angeführten Stopfen 25 verschließbar, der nach Figur 12 aus einem den Hantierungsschacht 24 tragenden Armierungstopf 67 und einer außenseitigen feuerfesten Verkleidung besteht. Dieser ist in Anlehnung an den Hitzeschild H an Spreizstiften 35 des Armierungstopfes 56 durch eine keramische Fasermatte 36, eine Folie 37 und eine Feuerbetonschicht 38 gebildet.The burner openings 8 are unevenly constructed, their collar plates 55, which are oval in outline, fastened to the cover plate 10 and lined with ceramic fiber material 54, accommodate the burner blocks 18, as have a groove 57 on the oval sides 56, into which a retaining tab 58 fits a holding device 59 (Figure 11). The devices 59, surrounded by the refractory concrete layer, are arranged on the support plate 15 of the heat shield H, in that a sheet metal web 60 fastened there at a distance around the oval sides 56 in cross sleeves 61 carries pins 62 with split pins 63, which pass through holes 64 in the support plate 15 and the retaining tab 58 inserted and spread to connect the two parts. Accordingly, after breaking up the refractory concrete layer 14, the devices 59 can be opened and the burner blocks 18 in the heat shield H can be replaced. Then the broken refractory concrete can be easily renewed. When the burner is removed, each burner block 18 can be closed with the plug 25 mentioned at the beginning, which, according to FIG. Based on the heat shield H on the expansion pins 35 of the reinforcement pot 56, this is formed by a ceramic fiber mat 36, a film 37 and a refractory concrete layer 38.

Der beschriebene Deckel W wird mit seinem Entleerungspalt 20 besonderen Betriebsverhältnissen gerecht. Im allgemeinen gilt die erfindungsgemäße Auskleidung für Deckel, die keinen seitlichen Entleerungsspalt haben. Desweiteren wird die erfindungsgemäße Auskleidung auch metallurgischen Gefäßen gerecht, die nicht in Stranggießanlagen eingesetzt, aber ähnlichen Betriebsbedingungen unterworfen sind.The described cover W with its emptying gap 20 is suitable for special operating conditions. In general, the lining according to the invention applies to lids which have no lateral emptying gap. Furthermore, the lining according to the invention also does justice to metallurgical vessels which are not used in continuous casting plants but are subject to similar operating conditions.

Claims (12)

1. Refractory lining for covers of metallurgical vessels, particularly for a tundish used in continuous casting installations, whose cover is lined in its interior with refractory material and is provided with burner openings, with a cover plate and insulation, characterised in that arranged in the cover (W) on its underside in front of an insulation (13) there is a heat shield (H) mounted on the cover plate (10) by means of support members (16, 34) so as to be removable and movable in a plane and the heat shield (H) is sealed with respect to the cover plate (10) by means of an elastic peripheral seal (41).
2. Lining as claimed in claim 1, characterised in that the heat shield (H) has a support plate (15) which is lined on the hot side with refractory material (14) and which has support pegs (16) which are mounted so as to be movable in a plane in sockets (34), pass through the insulation (13) and are supported on the cover plate (10).
3. Lining as claimed in claim 2, characterised in that the support pegs (16) rest with a shoulder (42) in a tolerance space (44) of the sockets (34).
4. Lining as claimed in claim 2 and 3, characterised in that the support pegs (16) are releasably supported on sockets (32) in the cover plate (10) and provided on the plate (10) are bushes (31) which border openings in the insulation (13) and surround the arrangement (16, 34).
5. Lining as claimed in claim 1 and 2, characterised in that the insulation comprises ceramic fibre packets (30) and the heat shield (H) has a refractory concrete layer (14) anchored to the support plate (15) by pegs (35) with the interposition of a ceramic fibre mat (36).
6. Lining as claimed in claim 1 and the subsequent claims, characterised in that burner bricks (18) arranged on the heat shield (H) engage in collars (55) which are secured to the cover plate (10) around the bumer opening (8) and are lined with ceramic fibre material (54).
7. Lining as claimed in claim 6, characterised in that each burner brick (18) is releasably mounted at at least two opposing points on the peripheral surface of a respective mounting device (59) arranged on the support plate (15) in the refractory concrete layer (14) (Figure 11).
8. Lining as claimed in claim 7, characterised in that the mounting device (59) has a mounting strap (58) which engages in a groove (57) in the burner brick (18) and which has split-pin connections with the support plate (15).
9. Lining as claimed in claims 1 to 5, characterised in that the pouring-in opening (9) in the cover (W) has an opening lining (19) which comprises a ceramic fibre mat (36) and a refractory concrete layer (14) and which is secured to a collar (50) on the cover plate (10) by means of expanding pins (35).
10. Lining as claimed in the preceding claims for a tundish with a discharge aperture (20) which is divided by lid supports (21) and is provided on the cover (W) along a longitudinal side, characterised in that refractory protective sleeves (47) surrounding the supports (21) are associated with the heat shield (H), which sleeves engage in openings (48) in a refractory protective layer (23) applied to the peripheral surface (22) of the distributor (V).
11. Lining as claimed in claim 1 and the subsequent claims, characterised in that the heat shield (H) is longitudinally divided into shield sections (40) with individual peripheral seals (41).
12. Lining as claimed in claims 1 to 11, characterised in that the support plate (15) of the heat shield (H) or of a shield section (40) has peripheral borders (39) which enclose the refractory concrete layer (14) and on which peripheral seals (41), preferably sealing cords, of ceramic fibres are provided.
EP87109901A 1986-10-14 1987-07-09 Refractory lining, especially for tundish covers Expired - Lifetime EP0267366B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87109901T ATE53520T1 (en) 1986-10-14 1987-07-09 REFRACTORY LINING, PARTICULARLY FOR HEAT MANIFOLD COVERS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863634892 DE3634892A1 (en) 1986-10-14 1986-10-14 FIRE RESISTANT LINING, ESPECIALLY FOR LID OF INTERMEDIATE CONTAINERS
DE3634829 1986-10-14

Publications (2)

Publication Number Publication Date
EP0267366A1 EP0267366A1 (en) 1988-05-18
EP0267366B1 true EP0267366B1 (en) 1990-06-13

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ID=6311658

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87109901A Expired - Lifetime EP0267366B1 (en) 1986-10-14 1987-07-09 Refractory lining, especially for tundish covers

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EP (1) EP0267366B1 (en)
AT (1) ATE53520T1 (en)
DE (2) DE3634892A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1003723A3 (en) * 1989-03-03 1992-06-02 Rech S Et Dev Desaar Sa Cover of a continuous casting distributor
FR2764368B1 (en) * 1997-06-06 1999-07-16 Lorraine Laminage STEEL EQUIPMENT WITH NON-CRACKING REFRACTORY COATING FOR THE TREATMENT OF LIQUID STEEL
CN110181032A (en) * 2019-05-27 2019-08-30 武汉科技大学 A kind of metallurgy backpack cover

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH518761A (en) * 1970-12-18 1972-02-15 Concast Ag Lids for casting vessels on continuous casting systems
CA1036791A (en) * 1973-12-11 1978-08-22 Hannes Vallak Method of manufacturing steel ingots or castings
US4339902A (en) * 1980-06-30 1982-07-20 Manville Service Corporation Multiple layer thermal insulation device
DE3231474A1 (en) * 1982-08-25 1984-03-01 Plibrico Co GmbH, 4000 Düsseldorf Peephole plug
LU84481A1 (en) * 1982-11-19 1984-06-13 Wurth Paul Sa PROTECTIVE DEVICE FOR PAN LID

Also Published As

Publication number Publication date
EP0267366A1 (en) 1988-05-18
ATE53520T1 (en) 1990-06-15
DE3634892C2 (en) 1988-07-28
DE3763154D1 (en) 1990-07-19
DE3634892A1 (en) 1988-04-28

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