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EP1294508A1 - 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 - Google Patents

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

Info

Publication number
EP1294508A1
EP1294508A1 EP01947414A EP01947414A EP1294508A1 EP 1294508 A1 EP1294508 A1 EP 1294508A1 EP 01947414 A EP01947414 A EP 01947414A EP 01947414 A EP01947414 A EP 01947414A EP 1294508 A1 EP1294508 A1 EP 1294508A1
Authority
EP
European Patent Office
Prior art keywords
pouring tube
tube part
refractory
openings
pouring
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
EP01947414A
Other languages
German (de)
French (fr)
Other versions
EP1294508B1 (en
Inventor
Heinrich Marti
Jacques Barbe
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.)
Main Management Inspiration AG
SMS Siemag AG
Original Assignee
Main Management Inspiration AG
SMS Demag AG
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 Main Management Inspiration AG, SMS Demag AG filed Critical Main Management Inspiration AG
Publication of EP1294508A1 publication Critical patent/EP1294508A1/en
Application granted granted Critical
Publication of EP1294508B1 publication Critical patent/EP1294508B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/064—Accessories therefor for supplying molten metal
    • 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
    • B22D41/08—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like for bottom pouring

Definitions

  • Refractory pouring tube unit for the arrangement on the pouring of a vessel containing molten metal, in particular an intermediate container of a strip casting installation
  • the invention relates to a refractory pouring tube unit for the arrangement on the spout of a vessel containing molten metal, in particular on the spout of an intermediate container of a strip casting installation.
  • a distributor vessel is arranged above the casting rollers and a pan is arranged above it.
  • a pouring tube on the spout of the pan protrudes into the distribution vessel, which in turn has a spout and a nozzle leading between the pouring rollers.
  • a stopper closure is provided in the pan for a controlled pouring of the melt.
  • the present invention was based on the object of designing a casting tube unit in such a way that the melt flowing in between the casting rollers takes place with the smallest possible kinetic energy with a laminar, uniform flow and the bath level that forms between these casting rollers remains as flat as possible.
  • the aim of the casting tube unit is to ensure that the melt is distributed as evenly as possible over the entire length of the casting roll, and that the band skin of the steel is formed on the two rolls over their entire width with a constant course of thickness.
  • the object is achieved in that the pouring tube unit has at least one vertical refractory pouring tube part which can be connected to the intermediate container and a horizontally extending refractory pouring tube part which extends therefrom and is provided with one or more openings distributed over the length.
  • FIG. 3 shows a side view of the pouring tube unit according to FIG. 2,
  • FIG. 5 shows a side view of the pouring tube unit according to FIG. 4,
  • Fig.6 and Fig.7 each another variant of a pouring tube unit in
  • Cut, 8 shows a partial section of a variant of an embodiment
  • FIG. 9 shows a section of the pouring tube unit according to FIG. 8 with a hint of the cast rollers and the side seals
  • FIG. 11 shows a section of the pouring tube unit according to FIG. 10 along the
  • FIG. 1 shows an intermediate container 10 lined with refractory for pouring molten metal into a strip casting machine 30 known per se, by means of which thin steel strips of a few millimeters in thickness and a width of up to 2 meters are produced in particular.
  • the casting rolls 31 and a housing box 32 enclosing them are indicated by the strip casting machine 30, which is only partially illustrated.
  • the intermediate container 10 has a lid 15 ', an interior receiving the melt 13 and a spout 14 arranged on its bottom.
  • the melt 13 is filled through an immersion tube 16 which extends into the container 10 and which is located on the spout of a pan (not shown in more detail) connected.
  • a pouring tube 25 forming the spout 14 projects into the melt bath 33 between the rotating casting rollers 31.
  • the interior of the container 10 is advantageously filled with inert gas.
  • a bellows 36 enclosing the pouring tube 25 is also provided between the container 10 and the housing cover 32.
  • the interior of the container is divided into at least two chambers 11, 12 connected to one another by a through-opening 17, of which the melt 13 can be filled into one chamber 11, while the other chamber 12 is provided with the spout 14, the one from the first amount of melt flowing into the second chamber 11, 12 can be adjusted by means of a control valve 19 at the passage opening 17.
  • a vertical partition 18 is expediently provided in the interior of the container, which is advantageously arranged off-center, so that the filling chamber 11 is two to thirty times larger in volume than the chamber 12 with the spout.
  • This control valve 19 which is designed as a plug closure, is expediently actuated in such a way that a constant bath height of the melt is maintained in the chamber 12 with the spout 14 during casting, which bath bath can advantageously be adjusted by a control element and a measuring device.
  • a rotary closure, a slide closure or the like could also be provided for the control valve.
  • the inlet 17 'at the nozzle 26 forming the through-opening 17 is arranged offset to the top of the container in the filling chamber 11. This has the advantage of moving from the pan to this chamber Any possible inclusions settle on the floor and do not get into the subsequent chamber 12.
  • the invention is characterized by the refractory pouring tube unit 25, 25 ', to which some design variants are explained below.
  • This pouring tube unit consists at least of a vertical pouring tube part 25 embedded on the bottom of the container and of a separate, elongated pouring tube part 25 'extending from it and provided with a horizontal extent.
  • This tubular casting tube part 25 "is provided with a plurality of openings 27 distributed over the length and is arranged at a distance from the casting rollers 31 and extends approximately over their length.
  • FIGS. 2 and 3 illustrate a refractory pouring tube unit which has a vertical pouring tube part 21 projecting downward from the container bottom with an inner metering nozzle 23 and a box-shaped pouring tube part 22 fastened to it.
  • the latter is advantageously provided with a sufficient length so that the melt bath 33 is supplied with so-called hot melt approximately to the outside of the side seals, and parasitic solidifications are prevented.
  • This pouring tube part 22 is made in two parts for manufacturing reasons, of which the upper cover-shaped part 24 is provided with a flange 24 'for attachment to the pouring tube part 21 and to which the lower shell-shaped part 29 is fastened by means of indicated pins 28, in particular refractory bolts.
  • This pouring tube part 22 forms an elongated channel 38 connected to the central inlet opening 39 and groove-shaped openings 34, 37 leading away from it on both sides and on the front side.
  • these several openings 34 which are evenly spaced over the length, are spaced upwards from the lower end arranged so that on the one hand the out of these openings 34 emerging melt has a flow direction obliquely upwards and on the other hand the channel 38 forms a kind of sump bath, from which any solid particles in the melt are deposited.
  • the further advantage arises that the melt flowing into this channel 38 is initially distributed in this channel over its entire length and then emerges from these openings 34 in approximately equal amounts.
  • Fig. 4 and Fig. 5 show a similar pouring tube unit as that according to Fig. Therefore, only the differences are explained below.
  • part 40 is assigned an upper and a lower longitudinal channel 44, 45, which are connected to one another by vertical bores 46 distributed over the length, the bores 46 becoming larger in diameter on the outside.
  • first longitudinal channel 44 the melt flow is throttled before the melt flows out through the second channel 45 and the outlet openings 42, which are in turn displaced upward.
  • the outlet openings 61, 62 are oriented in a V-shaped pouring tube part 60 as obliquely upwards at an angle of up to 60 ° to the horizontal, a lower and an upper row of these openings 61, 62 being provided , This results in an outflow direction of the melt obliquely upward in an approximately tangential direction to the respective casting roller 31.
  • end openings 63, 66 are also contained in this casting tube part 60. With this arrangement, the part 60 can be positioned deep in the bath and the openings 61, 62 result in an optimal distribution of the melt without the bath surface 33 'becoming unsteady.
  • the two-part 70 is again provided with a semicircular cross section.
  • the openings 71 are laterally offset upwards, so that the same advantageous effects as already explained above occur.
  • the openings 71 can only be arranged vertically downwards or in addition to the lateral ones. It is essential that the newly flowing material does not cause any local abrasion on the band skin.
  • FIGS. 8 and 9 show a variant of a pouring tube unit in which, in contrast to the examples above, the elongated pouring tube part 80 is not held on the vertical pouring tube part 81 but on a separate suspension 85.
  • This suspension 85 is attached to the bottom of the intermediate container 10.
  • two conventionally designed, vertically arranged pouring pipes 81 are provided, which are embedded in the intermediate container 10 at a certain distance from one another and extend into the 80. For smaller widths, only one pouring tube can be used.
  • the tubular casting tube part 80 has a plurality of lateral openings 83 and on the end side an elongated end cover 86, in which perforations 86 'are contained, in which the suspension 85 engages.
  • the pouring tube part 80 has approximately the same length as the pouring rollers 31, of which the side seals 91 are illustrated in FIG. This makes it possible to manufacture this pouring tube unit very easily, without having to accept technical disadvantages.
  • FIGS. 10 and 11 show a further very advantageous variant of a pouring tube unit, in which the elongate pouring tube part 90 consists of a horizontally extending refractory tube 91, a closing element 92 on each side and a partition 95.
  • the partition 95 arranged approximately in the center of the tube 91 divides the same into an upper and a lower chamber 93, 94, which are connected to one another by openings 97, such as bores, slots or the like, which are arranged in rows over the entire length of the partition.
  • openings 97 such as bores, slots or the like
  • this pouring tube unit consists in that the melt flows from the intermediate container through the passage opening 14 of the pouring tube part 21 into the lower chamber 94 until this chamber 94 has filled with melt. As a result, the melt rises through the openings 97 into the upper chamber 93 and from there through openings 96 in the wall delimiting the upper chamber, so that this melt can flow out in a targeted manner between the two casting rolls.
  • One or more openings are advantageously provided on the underside of the tube 91 so that the sump of the melt to be poured off, which forms in the chamber 94, can be emptied again at the pouring end.
  • the closure elements 92 can also be provided with corresponding openings.
  • the pouring tube parts could also have two or more parts in the sense that the tube parts could be composed of corresponding tube pieces.

Landscapes

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

Abstract

A refractory pouring spout and channel unit for the arrangement on the outlet of a tundish of a strip casting installation has at least one vertical, refractory pouring spout and channel part ( 25 ) which can be connected to the tundish; and a refractory pouring spout and channel part ( 25 ') which originates from said vertical part, which extends horizontally and which is provided with one or more openings that are distributed over its length. This results in almost constant laminar flow conditions for the melt flowing between the casting rollers.

Description

Feuerfeste Giessrohreinheit für die Anordnung am Ausguss eines Metallschmelze enthaltenden Gefässes, insbesondere eines Zwischenbehälters einer BandgiessanlageRefractory pouring tube unit for the arrangement on the pouring of a vessel containing molten metal, in particular an intermediate container of a strip casting installation
Die Erfindung betrifft eine feuerfeste Giessrohreinheit für die Anordnung am Ausguss eines Metallschmelze enthaltenden Gefässes, insbesondere am Ausguss eines Zwischenbehälters einer Bandgiessanlage.The invention relates to a refractory pouring tube unit for the arrangement on the spout of a vessel containing molten metal, in particular on the spout of an intermediate container of a strip casting installation.
Bei einer bekannten Bandgiessmaschine nach der Druckschrift FR-A-2 753 402 ist oberhalb der Giessrollen ein Verteilergefäss und über diesem eine Pfanne angeordnet. Ein Giessrohr am Ausguss der Pfanne ragt hierbei in das Verteilergefäss, das seinerseits einen Ausguss und eine zwischen die Giessrollen führende Düse aufweist. Ausserdem ist in der Pfanne ein Stopfenverschluss für ein gesteuertes Abgiessen der Schmelze vorgesehen. Nachteilig hierbei ist, dass in dem Verteilergefäss in gefülltem Zustand eine relativ grosse ferrostatische Höhe besteht, was eine entsprechend hohe Austrittsgeschwindigkeit verursacht. Damit wird durch die zwischen die Giessrollen, fliessende Schmelze eine unkonstant einfliessende Menge hervorgerufen und es entsteht zwischen diesen Giessrollen ein entsprechend unruhiges Bad.In a known belt casting machine according to the document FR-A-2 753 402, a distributor vessel is arranged above the casting rollers and a pan is arranged above it. A pouring tube on the spout of the pan protrudes into the distribution vessel, which in turn has a spout and a nozzle leading between the pouring rollers. In addition, a stopper closure is provided in the pan for a controlled pouring of the melt. The disadvantage here is that there is a relatively large ferrostatic height in the distributor vessel in the filled state, which causes a correspondingly high exit velocity. This causes an inconsistent amount to flow in through the melt flowing between the casting rolls, and a correspondingly restless bath is created between these casting rolls.
Der vorliegenden Erfindung wurde demgegenüber die Aufgabe zugrun- degelegt, eine Giessrohreinheit derart zu gestalten, dass die zwischen die Giessrollen einfliessende Schmelze mit einer möglichst kleinen kinetischen Energie mit laminarer gleichmässiger Strömung erfolgt und der sich bildende Badspiegel zwischen diesen Giessrollen möglichst flach bleibt. Ausserdem soll mit der Giessrohreinheit erzielt werden, dass die Schmelze möglichst gleichmassig über die gesamte Giessrollenlänge verteilt wird, und die Bandhaut des Stahles auf den beiden Rollen über deren ganze Breite mit konstantem Dickenverlauf gebildet wird. Die Aufgabe ist erfindungsgemäss dadurch gelöst, dass die Giessrohreinheit wenigstens einen an den Zwischenbehälter verbindbaren vertikalen feuerfesten Giessrohrteil und einen von diesem ausgehenden, sich horizontal erstreckenden feuerfesten Giessrohrteil aufweist, welcher mit einer oder mit mehreren über die Länge verteilten Öffnungen versehen ist.In contrast, the present invention was based on the object of designing a casting tube unit in such a way that the melt flowing in between the casting rollers takes place with the smallest possible kinetic energy with a laminar, uniform flow and the bath level that forms between these casting rollers remains as flat as possible. In addition, the aim of the casting tube unit is to ensure that the melt is distributed as evenly as possible over the entire length of the casting roll, and that the band skin of the steel is formed on the two rolls over their entire width with a constant course of thickness. According to the invention, the object is achieved in that the pouring tube unit has at least one vertical refractory pouring tube part which can be connected to the intermediate container and a horizontally extending refractory pouring tube part which extends therefrom and is provided with one or more openings distributed over the length.
Mit dieser erfindungsgemässen Giessrohreinheit nach der Erfindung ist gewährleistet, dass die Schmelze zwischen den Giessrollen gleichmassig und hierbei wiederum mit einer langsamen Strömung verteilt wird, so dass auch die Badoberfläche ruhig bleibt. Dies trägt erheblich zu einem einwandfreien Abgiessen mit dieser Bandgiessmaschine bei.With this pouring tube unit according to the invention, it is ensured that the melt between the casting rollers is distributed uniformly and here again with a slow flow, so that the bath surface also remains calm. This contributes significantly to perfect casting with this belt casting machine.
Ausführungsbeispiele der Erfindung sowie weitere Vorteile derselben sind nachfolgend anhand der Zeichnung näher erläutert. Es zeigt:Exemplary embodiments of the invention and further advantages thereof are explained in more detail below with reference to the drawing. It shows:
Fig.1 einen Zwischenbehälter und eine erfindungsgemässe1 shows an intermediate container and an inventive
Giessrohreinheit im Längsschnitt,Pour tube unit in longitudinal section,
Fig.2 einen Schnitt einer erfindungsgemässen Giessrohreinheit zwischen den angedeuteten Giessrollen,2 shows a section of a casting tube unit according to the invention between the indicated casting rolls,
Fig.3 eine Seitenansicht der Giessrohreinheit nach Fig.2,3 shows a side view of the pouring tube unit according to FIG. 2,
Fig.4 eine Variante einer Giessrohreinheit im Schnitt zwischen den angedeuteten Giessrollen,4 shows a variant of a pouring tube unit in section between the indicated casting rolls,
Fig.5 eine Seitenansicht der Giessrohreinheit nach Fig.4,5 shows a side view of the pouring tube unit according to FIG. 4,
Fig.6 und Fig.7 je eine weitere Variante einer Giessrohreinheit imFig.6 and Fig.7 each another variant of a pouring tube unit in
Schnitt, Fig.8 einen teilweisen Schnitt einer Ausführungsvariante einerCut, 8 shows a partial section of a variant of an embodiment
Giessrohreinheit,spout unit,
Fig.9 einen Schnitt der Giessrohreinheit nach Fig.8 mit andeu- tungsweiser Darstellung der Giessrollen und der Seitenabdichtungen,9 shows a section of the pouring tube unit according to FIG. 8 with a hint of the cast rollers and the side seals,
Fig.10 einen Längsschnitt einer Ausführungsvariante einer10 shows a longitudinal section of a variant of an embodiment
Giessrohreinheit, undPouring tube unit, and
Fig.1 1 einen Schnitt der Giessrohreinheit nach Fig.10 entlang der11 shows a section of the pouring tube unit according to FIG. 10 along the
Linie I - I.Line I - I.
Fig.1 zeigt einen mit Feuerfest ausgekleideten Zwischenbehälter 10 für das Abgiessen von Metallschmelze in eine an sich bekannte Bandgiessmaschine 30, mittels der insbesondere dünne Stahlbänder von einigen Millimetern Dicke und einer Breite bis zu 2 Metern erzeugt werden. Von der nur teilweise veranschaulichten Bandgiessmaschine 30 sind die Giessrollen 31 und ein diese umschliessender Gehäusekasten 32 ange- deutet.1 shows an intermediate container 10 lined with refractory for pouring molten metal into a strip casting machine 30 known per se, by means of which thin steel strips of a few millimeters in thickness and a width of up to 2 meters are produced in particular. The casting rolls 31 and a housing box 32 enclosing them are indicated by the strip casting machine 30, which is only partially illustrated.
Der Zwischenbehälter 10 hat einen Deckel 15', ein die Schmelze 13 aufnehmendes Inneres und einen an seinem Boden angeordneten Ausguss 14. Die Schmelze 13 wird durch ein sich in den Behälter 10 erstrecken- des Tauchrohr 16 eingefüllt, welches am Ausguss einer nicht näher gezeigten Pfanne angeschlossen ist. Ein den Ausguss 14 bildendes Giessrohr 25 ragt in das Schmelzenbad 33 zwischen den sich drehenden Giessrollen 31. Das Innere des Behälters 10 ist hierbei vorteilhaft mit Inertgas gefüllt. Zwischen dem Behälter 10 und dem Gehäusedeckel 32 ist ferner ein das Giessrohr 25 umschliessender Balg 36 vorgesehen. Das Behälterinnere ist in wenigstens zwei mit einer Durchgangsöffnung 17 miteinander verbundene Kammern 1 1 , 12 unterteilt, von denen in die eine Kammer 1 1 die Schmelze 13 einfüllbar ist, indessen die andere Kammer 12 mit dem Ausguss 14 versehen ist, wobei die von der ersten in die zweite Kammer 11 , 12 fliessende Schmelzenmenge mittels eines Steuerventiles 19 bei der Durchgangsöffnung 17 einstellbar ist.The intermediate container 10 has a lid 15 ', an interior receiving the melt 13 and a spout 14 arranged on its bottom. The melt 13 is filled through an immersion tube 16 which extends into the container 10 and which is located on the spout of a pan (not shown in more detail) connected. A pouring tube 25 forming the spout 14 projects into the melt bath 33 between the rotating casting rollers 31. The interior of the container 10 is advantageously filled with inert gas. A bellows 36 enclosing the pouring tube 25 is also provided between the container 10 and the housing cover 32. The interior of the container is divided into at least two chambers 11, 12 connected to one another by a through-opening 17, of which the melt 13 can be filled into one chamber 11, while the other chamber 12 is provided with the spout 14, the one from the first amount of melt flowing into the second chamber 11, 12 can be adjusted by means of a control valve 19 at the passage opening 17.
Zweckmässigerweise ist im Behälterinnern eine vertikale Trennwand 18 vorgesehen, welche mit Vorteil aussermittig angeordnet ist, so dass die Einfüllkammer 1 1 im Volumen zwei- bis dreissigmal so gross wie die Kammer 12 mit dem Ausguss ist.A vertical partition 18 is expediently provided in the interior of the container, which is advantageously arranged off-center, so that the filling chamber 11 is two to thirty times larger in volume than the chamber 12 with the spout.
Sehr vorteilhaft liegt beim Abgiessen der Badspiegel 13" in der Kammer 12 mit dem Ausguss 14 im Vergleich zum Badspiegel 13' in der anderen Einfüllkammer 1 1 wie dargestellt tiefer, vorzugsweise zwischen 10 und 50 % der Badhöhe. Damit können gerade im unteren Bereich des Giessrohres eine geringe kinetische Energie der durchfliessenden Schmelze und dementsprechend konstante laminare Strömungsverhältnisse erzielt werden.When pouring the bath level 13 "in the chamber 12 with the spout 14, it is very advantageous, as shown, in comparison to the bath level 13 'in the other filling chamber 11, to be lower, preferably between 10 and 50% of the bath height. This means that in the lower area of the pouring tube a low kinetic energy of the flowing melt and accordingly constant laminar flow conditions can be achieved.
Zweckmässigerweise wird dieses als Stopfenverschluss ausgebildete Steuerventil 19 derart betätigt, dass in der Kammer 12 mit dem Ausguss 14 während dem Giessen eine konstante Badhöhe der Schmelze eingehalten wird, welche vorteilhaft durch ein Steuerorgan und ein Messgerät für die Badhöhe einstellbar ist. Für das Steuerventil könnte auch ein Drehverschluss, ein Schiebeverschluss oder dergleichen vorgesehen sein.This control valve 19, which is designed as a plug closure, is expediently actuated in such a way that a constant bath height of the melt is maintained in the chamber 12 with the spout 14 during casting, which bath bath can advantageously be adjusted by a control element and a measuring device. A rotary closure, a slide closure or the like could also be provided for the control valve.
Der Einlauf 17' bei der die Durchgangsöffnung 17 bildenden Düse 26 ist zum Behälterboden in der Einfüllkammer 1 1 nach oben versetzt ange- ordnet. Dies bietet den Vorteil, dass von der Pfanne in diese Kammer allenfalls gelangende Einschlüsse sich am Boden setzen und nicht in die nachfolgende Kammer 12 gelangen.The inlet 17 'at the nozzle 26 forming the through-opening 17 is arranged offset to the top of the container in the filling chamber 11. This has the advantage of moving from the pan to this chamber Any possible inclusions settle on the floor and do not get into the subsequent chamber 12.
Die Erfindung zeichnet sich durch die feuerfeste Giessrohreinheit 25, 25' aus, zu der nachfolgend einige Ausführungsvarianten erläutert sind. Die- se Giessrohreinheit besteht wenigstens aus einem am Behälterboden eingebetteten vertikalen Giessrohrteil 25 und aus einem separaten, von diesem ausgehenden, mit einer horizontalen Ausdehnung versehenen länglicher Giessrohrteil 25'. Dieser rohrförmig ausgebildete Giessrohrteil 25" ist mit mehreren über die Länge verteilten Öffnungen 27 versehen und beabstandet zu den Giessrollen 31 annähernd über deren Länge erstreckend angeordnet.The invention is characterized by the refractory pouring tube unit 25, 25 ', to which some design variants are explained below. This pouring tube unit consists at least of a vertical pouring tube part 25 embedded on the bottom of the container and of a separate, elongated pouring tube part 25 'extending from it and provided with a horizontal extent. This tubular casting tube part 25 "is provided with a plurality of openings 27 distributed over the length and is arranged at a distance from the casting rollers 31 and extends approximately over their length.
Fig.2 und Fig.3 veranschaulichen eine feuerfeste Giessrohreinheit, welche ein vom Behälterboden nach unten wegragendes vertikales Giessrohrteil 21 mit einer inneren Meteringdüse 23 und einen an diesem befestigten kastenförmigen Giessrohrteil 22 aufweist. Letzterer ist vorteilhaft mit einer ausreichenden Länge versehen, damit das Schmelzenbad 33 annähernd bis aussen zu den Seitenabdichtungen mit sogenannter heisser Schmelze versorgt ist und parasitäre Erstarrungen ver- hindert werden. Dieser Giessrohrteil 22 ist aus fertigungstechnischen Gründen zweiteilig ausgebildet, von dem der obere deckeiförmige Teil 24 mit einem Flansch 24' für die Befestigung an das Giessrohrteil 21 versehen und an diesen der untere schalenförmige Teil 29 mittels angedeuteten Stiften 28, insbesondere feuerfesten Bolzen, befestigt ist.2 and 3 illustrate a refractory pouring tube unit which has a vertical pouring tube part 21 projecting downward from the container bottom with an inner metering nozzle 23 and a box-shaped pouring tube part 22 fastened to it. The latter is advantageously provided with a sufficient length so that the melt bath 33 is supplied with so-called hot melt approximately to the outside of the side seals, and parasitic solidifications are prevented. This pouring tube part 22 is made in two parts for manufacturing reasons, of which the upper cover-shaped part 24 is provided with a flange 24 'for attachment to the pouring tube part 21 and to which the lower shell-shaped part 29 is fastened by means of indicated pins 28, in particular refractory bolts.
Dieser Giessrohrteil 22 bildet einen mit der zentralen Einlassöffnung 39 verbundenen länglichen Kanal 38 und beidseitig wie auch stirnseitig von diesem wegführende nutenförmige Öffnungen 34, 37. Diese mehreren über die Länge in gleichmässigen Abständen verteilten Öffnungen 34 sind im Rahmen der Erfindung vom unteren Ende nach oben beabstandet angeordnet, so dass zum einen die aus diesen Öffnungen 34 aus- tretende Schmelze eine Fliessrichtung schräg nach oben hat und zum anderen der Kanal 38 eine Art Sumpfbad bildet, hieraus in ihm allenfalls in der Schmelze befindliche Feststoffpartikel abgelagert werden. Es entsteht der weitere Vorteil, dass sich die in diesen Kanal 38 einfliessende Schmelze vorerst in diesem über seine gesamte Länge verteilt und dann in annähernd gleichen Mengen aus diesen Öffnungen 34 austritt.This pouring tube part 22 forms an elongated channel 38 connected to the central inlet opening 39 and groove-shaped openings 34, 37 leading away from it on both sides and on the front side. Within the scope of the invention, these several openings 34, which are evenly spaced over the length, are spaced upwards from the lower end arranged so that on the one hand the out of these openings 34 emerging melt has a flow direction obliquely upwards and on the other hand the channel 38 forms a kind of sump bath, from which any solid particles in the melt are deposited. The further advantage arises that the melt flowing into this channel 38 is initially distributed in this channel over its entire length and then emerges from these openings 34 in approximately equal amounts.
Fig.4 und Fig.5 zeigen eine ähnliche Giessrohreinheit wie diejenige nach Fig. . Es sind daher nachfolgend nurmehr die Unterschiede erläutert. Bei dieser Giessrohreinheit sind dem Teil 40 ein oberer und ein unterer Längskanal 44, 45 zugeordnet, welche durch über die Länge verteilte senkrechte Bohrungen 46 miteinander verbunden sind, wobei die Bohrungen 46 nach aussen im Durchmesser grösser werden. Mit diesem ersten Längskanal 44 wird eine Drosselung der Schmelzenströmung herbeigeführt, bevor die Schmelze durch den zweiten Kanal 45 und die wie- derum nach oben versetzten Austrittsöffnungen 42 ausflieset.Fig. 4 and Fig. 5 show a similar pouring tube unit as that according to Fig. Therefore, only the differences are explained below. In this pouring tube unit, part 40 is assigned an upper and a lower longitudinal channel 44, 45, which are connected to one another by vertical bores 46 distributed over the length, the bores 46 becoming larger in diameter on the outside. With this first longitudinal channel 44, the melt flow is throttled before the melt flows out through the second channel 45 and the outlet openings 42, which are in turn displaced upward.
Bei der Giessrohreinheit nach Fig.6 sind in einem V-förmigen Giessrohrteil 60 die Austrittsöffnungen 61 , 62 als schräg nach oben in einem Winkel von bis zu 60° zur Horizontalen ausgerichtet, wobei eine untere und eine obere Reihe dieser Öffnungen 61 , 62 vorgesehen sind. Damit ergibt sich eine Ausflussrichtung der Schmelze schräg nach oben in einer annähernd tangentialen Richtung zu der jeweiligen Giessrolle 31. Ferner sind noch stirnseitige Öffnungen 63, 66 in diesem Giessrohrteil 60 enthalten. Mit dieser Anordnung kann der Teil 60 tief im Bad posi- tioniert werden und die Öffnungen 61 , 62 ergeben eine optimale Verteilung der Schmelze, ohne dass die Badoberfläche 33' unruhig würde.In the pouring tube unit according to FIG. 6, the outlet openings 61, 62 are oriented in a V-shaped pouring tube part 60 as obliquely upwards at an angle of up to 60 ° to the horizontal, a lower and an upper row of these openings 61, 62 being provided , This results in an outflow direction of the melt obliquely upward in an approximately tangential direction to the respective casting roller 31. Furthermore, end openings 63, 66 are also contained in this casting tube part 60. With this arrangement, the part 60 can be positioned deep in the bath and the openings 61, 62 result in an optimal distribution of the melt without the bath surface 33 'becoming unsteady.
Gemäss Fig.7 ist der wiederum zweiteilige 70 mit einem halbkreisförmigen Querschnitt versehen. Die Öffnungen 71 sind seitlich nach oben ver- setzt angeordnet, so dass die gleichen vorteilhaften Wirkungen wie bereits oben erläutert eintreten. Im Prinzip können die Öffnungen 71 nur oder zusätzlich zu den seitlichen vertikal nach unten angeordnet sein. Wesentlich dabei ist, dass durch das neu zufliessende Material kein örtlicher Abtrag an der entstehenden Bandhaut entsteht.7, the two-part 70 is again provided with a semicircular cross section. The openings 71 are laterally offset upwards, so that the same advantageous effects as already explained above occur. In principle, the openings 71 can only be arranged vertically downwards or in addition to the lateral ones. It is essential that the newly flowing material does not cause any local abrasion on the band skin.
Fig.8 und Fig.9 zeigen eine Variante einer Giessrohreinheit, bei der im Unterschied zu den obigen Beispielen der längliche Giessrohrteil 80 nicht am vertikalen Giessrohrteil 81 , sondern an einer separaten Aufhängung 85 gehalten ist. Diese Aufhängung 85 ist hierbei am Boden des Zwischenbehälters 10 befestigt. Ausserdem sind zwei herkömmlich ausgestaltete, vertikal angeordnete Giessrohre 81 vorgesehen, die in einem bestimmten Abstand zueinander im Zwischenbehälter 10 eingebettet sind und sich bis in den 80 erstrecken. Für kleinere Breiten kann auch nur mit einem Giessrohr gearbeitet werden.8 and 9 show a variant of a pouring tube unit in which, in contrast to the examples above, the elongated pouring tube part 80 is not held on the vertical pouring tube part 81 but on a separate suspension 85. This suspension 85 is attached to the bottom of the intermediate container 10. In addition, two conventionally designed, vertically arranged pouring pipes 81 are provided, which are embedded in the intermediate container 10 at a certain distance from one another and extend into the 80. For smaller widths, only one pouring tube can be used.
Der rohrförmig ausgebildete Giessrohrteil 80 hat mehrere seitliche Öffnungen 83 und stirnseitig je einen verlängerten Abschlussdeckel 86, in dem Lochungen 86' enthalten sind, darin die Aufhängung 85 eingreift. Der Giessrohrteil 80 hat annähernd eine Länge wie die Giessrollen 31 , von den in Fig.9 die Seitenabdichtungen 91 veranschaulicht sind. Damit lässt sich diese Giessrohreinheit sehr einfach herstellen, ohne dass damit technische Nachteile in Kauf genommen werden müssten.The tubular casting tube part 80 has a plurality of lateral openings 83 and on the end side an elongated end cover 86, in which perforations 86 'are contained, in which the suspension 85 engages. The pouring tube part 80 has approximately the same length as the pouring rollers 31, of which the side seals 91 are illustrated in FIG. This makes it possible to manufacture this pouring tube unit very easily, without having to accept technical disadvantages.
Fig.10 und Fig.1 1 zeigen eine weitere sehr vorteilhafte Variante einer Giessrohreinheit, bei welcher der längliche Giessrohrteil 90 aus einem horizontal sich erstreckenden feuerfesten Rohr 91 , beidseitig je einem Abschlusselement 92 und einer Trennwand 95 besteht. Die annähernd im Zentrum des Rohres 91 angeordnete Trennwand 95 unterteilt dasselbe in eine obere und eine untere Kammer 93, 94, welche durch über die gesamte Länge der Trennwand reihenweise angeordnete Öffnungen 97, wie Bohrungen, Schlitze oder dergleichen miteinander verbunden sind. Annähernd in der Mitte des Rohres 91 ragt der Giessrohrteil 21 durch dieses und die Trennwand 95 und mündet somit in die untere Kammer 94.FIGS. 10 and 11 show a further very advantageous variant of a pouring tube unit, in which the elongate pouring tube part 90 consists of a horizontally extending refractory tube 91, a closing element 92 on each side and a partition 95. The partition 95 arranged approximately in the center of the tube 91 divides the same into an upper and a lower chamber 93, 94, which are connected to one another by openings 97, such as bores, slots or the like, which are arranged in rows over the entire length of the partition. Approximately in the middle of the tube 91, the pouring tube part 21 projects through this and the partition 95 and thus opens into the lower chamber 94.
Die Funktionsweise dieser Giessrohreinheit besteht darin, dass die Schmelze vom Zwischenbehälter durch die Durchlassöffnung 14 des Giessrohrteils 21 in die untere Kammer 94 einfliesst, bis dass sich diese Kammer 94 mit Schmelze gefüllt hat. In der Folge steigt die Schmelze durch die Öffnungen 97 in die obere Kammer 93 und von dieser durch Öffnungen 96 in der die obere Kammer begrenzenden Wandung, so dass diese Schmelze zielgerichtet zwischen die beiden Giessrollen ausflie- ssen kann.The functioning of this pouring tube unit consists in that the melt flows from the intermediate container through the passage opening 14 of the pouring tube part 21 into the lower chamber 94 until this chamber 94 has filled with melt. As a result, the melt rises through the openings 97 into the upper chamber 93 and from there through openings 96 in the wall delimiting the upper chamber, so that this melt can flow out in a targeted manner between the two casting rolls.
Damit sich der in der Kammer 94 bildende Sumpf der abzugiessenden Schmelze am Giessende wieder entleeren kann, sind auf der Unterseite des Rohres 91 vorteilhaft eine oder mehrere Öffnungen vorgesehen. Auch die Abschlusselemente 92 können ferner mit entsprechenden Öffnungen versehen sein.One or more openings are advantageously provided on the underside of the tube 91 so that the sump of the melt to be poured off, which forms in the chamber 94, can be emptied again at the pouring end. The closure elements 92 can also be provided with corresponding openings.
Die Erfindung ist mit den oben erläuterten Ausführungsbeispielen ausrei- chend dargetan. Sie liesse sich jedoch noch in anderen Varianten darstellen.The invention has been sufficiently demonstrated with the exemplary embodiments explained above. However, it could also be represented in other variants.
Die Giessrohrteile könnten auch in dem Sinne zwei- oder mehrteilig ausgebildet sein, als die Rohrteile aus entsprechenden Rohrstücken zu- sammengesetzt sein könnten. The pouring tube parts could also have two or more parts in the sense that the tube parts could be composed of corresponding tube pieces.

Claims

Patentansprüche claims
1. Feuerfeste Giessrohreinheit für die Anordnung am Ausguss eines Metallschmelze enthaltenden Gefässes, insbesondere am Ausguss (14) eines Zwischenbehälters (10) einer Bandgiessanlage, dadurch gekennzeichnet, dass die Giessrohreinheit wenigstens einen an den Zwischenbehälter verbindbaren vertikalen feuerfesten Giessrohrteil (25, 41, 81) und einen von diesem ausgehenden, sich horizontal erstreckenden feuerfesten Giessrohrteil (25', 22, 40, 60, 70, 80) aufweist, welcher mit einer oder mit mehreren über die Länge verteilten Öffnungen1. Refractory pouring tube unit for the arrangement on the pouring of a metal-containing vessel, in particular on the pouring (14) of an intermediate container (10) of a belt casting system, characterized in that the pouring tube unit has at least one vertical refractory pouring tube part (25, 41, 81) which can be connected to the intermediate container. and has a horizontally extending refractory pouring tube part (25 ', 22, 40, 60, 70, 80) extending therefrom, which has one or more openings distributed over the length
(27, 34, 42, 61, 62, 71, 83) versehen ist.(27, 34, 42, 61, 62, 71, 83) is provided.
2. Feuerfeste Giessrohreinheit nach Anspruch 1, dad u rc h geken nze i c h net, dass der horizontal sich erstreckende Giessrohrteil (25', 22, 40, 60,2. Refractory pouring tube unit according to claim 1, so that the horizontally extending pouring tube part (25 ', 22, 40, 60,
70, 80) separat zum vertikalen Giessrohrteil (25, 41, 81) angeordnet ist, und dass der vertikale in den horizontalen Giessrohrteil hineinragt oder dass diese beiden aneinander befestigt sind.70, 80) is arranged separately from the vertical pouring tube part (25, 41, 81), and that the vertical part projects into the horizontal pouring tube part or that these two are fastened to one another.
3. Feuerfeste Giessrohreinheit nach Anspruch 1 oder 2, dad u rc h g eken nzei ch n et, dass die mehreren über die Länge verteilten, vorzugsweise als Schlitze ausgebildeten Öffnungen (27, 34, 42, 61, 62, 71, 83) des Giessrohrteils (25', 22, 40, 60, 70, 80) derart angeordnet sind, dass sie eine Ausflussrichtung der Schmelze schräg und/oder annähernd senkrecht nach oben bewirken. 3. Refractory pouring tube unit according to claim 1 or 2, so that the plurality of openings (27, 34, 42, 61, 62, 71, 83) of the pouring tube part distributed over the length, preferably designed as slots (25 ', 22, 40, 60, 70, 80) are arranged such that they cause the melt to flow out obliquely and / or approximately vertically upwards.
4. Feuerfeste Giessrohreinheit nach Anspruch 1, 2 oder 3, dad u rc h geken nze i ch net, dass die mehreren über die Länge verteilten Öffnungen (27, 34, 42, 61, 62, 71, 83) des horizontalen Giessrohrteils (25', 22, 40, 60, 70, 80) vom unteren Ende beabstandet nach oben angeordnet sind, so dass in dem Giessrohrteil ein Sumpfbad gebildet ist.4. Refractory pouring tube unit according to claim 1, 2 or 3, so that the plurality of openings (27, 34, 42, 61, 62, 71, 83) of the horizontal pouring tube part (25 ', 22, 40, 60, 70, 80) are spaced upwards from the lower end, so that a sump bath is formed in the pouring tube part.
5. Feuerfeste Giessrohreinheit nach einem der vorhergehenden Ansprüche 1 bis 4, dadu rch gekennzeich net, dass der horizontale Giessrohrteil einen annähernd rechteckigen, drei- oder mehreckigen, runden, halbrunden oder einen ähnlichen Querschnitt aufweist und in ihm mindestens ein länglicher Kanal (38, 44, 45) gebildet ist, von dem beidseitig wie auch vorzugsweise stirnseitig die Öffnungen (27, 34, 42) wegführen.5. Refractory pouring tube unit according to one of the preceding claims 1 to 4, characterized in that the horizontal pouring tube part has an approximately rectangular, triangular or polygonal, round, semicircular or similar cross section and at least one elongated channel (38, 44 , 45) is formed, from which the openings (27, 34, 42) lead away on both sides and preferably also on the end.
6. Feuerfeste Giessrohreinheit nach Anspruch 5, dad u rc h geken nze i ch net, dass dem horizontalen Giessrohrteil (40) ein oberer und ein unterer Längskanal (44, 45) zugeordnet ist, welche durch über die Länge verteilte senkrechte Bohrungen (46) miteinander verbunden sind.6. Refractory pouring tube unit according to claim 5, so that the horizontal pouring tube part (40) is assigned an upper and a lower longitudinal channel (44, 45), which are distributed through the length of vertical bores (46). are interconnected.
7. Feuerfeste Giessrohreinheit nach einem der vorhergehenden Ansprüche 1 bis 6, dad u rch geken nzeich net, dass der längliche Giessrohrteil (80) unabhängig vom vertikalen Giessrohrteil (81) an einer separaten Aufhängung (85) gehalten ist, und sich dieser eine Giessrohrteil (81) hierbei in den andern Giessrohrteil (80) erstreckt. Feuerfeste Giessrohreinheit nach einem der vorhergehenden Ansprüche 1 bis 3, dad u rch geken nzeic h n et, dass der längliche Giessrohrteil (90) durch eine Trennwand (95) in eine obere und in eine untere Kammer (93, 94) geteilt ist, wobei der Ausguss des vertikalen Giessrohrteils (21) in die untere Kammer7. Refractory pouring tube unit according to one of the preceding claims 1 to 6, characterized in that the elongated pouring tube part (80) is held independently of the vertical pouring tube part (81) on a separate suspension (85), and this is a pouring tube part ( 81) extends into the other pouring tube part (80). Refractory pouring tube unit according to one of the preceding claims 1 to 3, characterized in that the elongated pouring tube part (90) is divided by a partition (95) into an upper and a lower chamber (93, 94), the Pour the vertical pouring tube part (21) into the lower chamber
(94) einmündet und in der Trennwand (95) Öffnungen (97) oder dergleichen vorgesehen sind, durch welche die in die untere Kammer (94) eingeflossene Schmelze in die obere Kammer (93) steigen kann und von dieser durch Öffnungen (96) in der die obere Kammer (93) begrenzenden Wandung ausfliessen kann. (94) opens and in the partition (95) openings (97) or the like are provided, through which the melt which has flowed into the lower chamber (94) can rise into the upper chamber (93) and from there through openings (96) which can flow out the wall delimiting the upper chamber (93).
EP01947414A 2000-06-28 2001-06-27 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 Expired - Lifetime EP1294508B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH01277/00A CH691762A5 (en) 2000-06-28 2000-06-28 Intermediate container used for casting molten metal in a continuous casting machine has an inner part divided into at least two chambers connected to each other by an opening
CH12772000 2000-06-28
PCT/EP2001/007351 WO2002000372A1 (en) 2000-06-28 2001-06-27 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

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EP1294508A1 true EP1294508A1 (en) 2003-03-26
EP1294508B1 EP1294508B1 (en) 2004-06-09

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EP01953179A Withdrawn EP1294509A1 (en) 2000-06-28 2001-06-27 Tundish for pouring off a molten metal into a strip casting machine
EP01947414A Expired - Lifetime EP1294508B1 (en) 2000-06-28 2001-06-27 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

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EP (2) EP1294509A1 (en)
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KR (1) KR100787966B1 (en)
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JP5078213B2 (en) 2012-11-21
WO2002000373A1 (en) 2002-01-03
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CH691762A5 (en) 2001-10-15
CN1440316A (en) 2003-09-03
AU2001269101A1 (en) 2002-01-08
JP2004501769A (en) 2004-01-22
KR100787966B1 (en) 2007-12-24
CN1225330C (en) 2005-11-02
CA2413339A1 (en) 2002-01-03
US7063242B2 (en) 2006-06-20
AU2001275686A1 (en) 2002-01-08
EP1294509A1 (en) 2003-03-26
KR20030016305A (en) 2003-02-26
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EP1294508B1 (en) 2004-06-09
RU2270735C2 (en) 2006-02-27

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