EP0351414B1 - Immersion nozzle for metallurgical recipients - Google Patents

Immersion nozzle for metallurgical recipients Download PDF

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Publication number
EP0351414B1
EP0351414B1 EP88902787A EP88902787A EP0351414B1 EP 0351414 B1 EP0351414 B1 EP 0351414B1 EP 88902787 A EP88902787 A EP 88902787A EP 88902787 A EP88902787 A EP 88902787A EP 0351414 B1 EP0351414 B1 EP 0351414B1
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EP
European Patent Office
Prior art keywords
immersion nozzle
section
long section
pct
nozzle according
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EP88902787A
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German (de)
French (fr)
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EP0351414A1 (en
Inventor
Hans Butz
Gerd Diederich
Hans-Jürgen Ehrenberg
Dietmar Lohse
Lothar Parschat
Fritz-Peter Pleschiutschnigg
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Vodafone GmbH
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Mannesmann AG
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Priority to AT88902787T priority Critical patent/ATE69002T1/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
    • B22D41/50—Pouring-nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/58—Pouring-nozzles with gas injecting means

Definitions

  • the invention relates to an immersion nozzle for metallurgical vessels, in particular for a storage container arranged upstream of a continuous casting mold, according to the preamble of claim 1.
  • the basic body of such a pouring tube consists of alumina-graphite materials with high wear resistance against liquid steel and protection of the graphite component against burnout and solution in the steel.
  • pouring tubes in the embodiment as immersion spouts for so-called slab cross sections i.e. e.g. Cross sections of 300 mm x 2600 mm require a suitable geometric design with regard to their casting performance.
  • the internal cross section is made so large that the required casting performance is maintained that alumina deposits do not lead to restrictions in the casting speed.
  • mold cross sections become smaller, e.g. 50 mm mold width, the dimensions and therefore the flow cross-sections of an immersion nozzle must be reduced.
  • the object of the invention is therefore to design the immersion nozzle mentioned at the outset in such a way that a favorable flow distribution in the mold can be achieved with high casting performance when continuously casting flat slabs with a large width.
  • Another advantage is the interaction with a smooth-walled continuous casting mold, the manufacturing costs of which are correspondingly low.
  • a favorable flow distribution is also achieved in that the upper longitudinal section is round in cross section and the lower longitudinal section is rectangular in cross section, a conical transition being provided between the two longitudinal sections.
  • At least the wall thickness of the lower length section is a maximum of 10 mm.
  • the lower length section is at least partially made of a refractory, thermal shock-resistant and resistant to powder slag Werkstott exists, zirconium oxide being the main constituent and graphite and / or silicon carbide and / or boron nitride and / or refractory metals and / or refractory metal bonds being provided as additives.
  • the upper longitudinal section and the lower longitudinal section can be produced by means of divisible core segments.
  • the flow opening is correspondingly narrow and can be up to 10 mm and less.
  • a flow-oriented cavity is advantageously produced by means of assembled core segments.
  • the steel core should have an axially removable central core and side cores that can be pulled out through the mouth openings as well as secondary cores that can be moved into the center and then also axially pulled out from there.
  • the refractory mass is pressed isostatically around the steel core in such a way that the forces occurring during the pressing are always supported on the central core.
  • the pouring pipe 2 which is also referred to below as immersion spout 2a, is fastened to a perforated brick 1 of a storage container.
  • the type of fastening or the fastening means depend on whether a plug closure 3 or a slide closure (not shown) is used.
  • an inlet pipe 4 is embedded for the plug closure 3 in the perforated brick 1, which penetrates the sheet metal jacket 5 and is spherically shaped at its lower end 4a.
  • a first holding plate 7 is inserted laterally in a groove 6.
  • a second holding plate 8 engages, which presses the pouring pipe 2 or the flange 2b against the spherically shaped end 4a of the inlet pipe 4 by means of threaded screws 9 provided in pairs.
  • a sealing seat 10 is created by the concave inner shape 2c adapted to the spherical shape of the inlet pipe end 4a.
  • FIG. 1 forms a first longitudinal sectional plane in which the upper longitudinal section 12, apart from a conical transition 14, is narrow in the region 15 and the lower one Longitudinal section 13 has a much wider area 16 than the narrow area 15.
  • the difference in widths between areas 15 and 16 results from the length / width ratio of 20: 1 to 80: 1 in the mouth area 17 compared to the flow cross section 18 of the inlet pipe 4.
  • the lateral mouth openings 19 and 20 together have a flow cross section that is not quite as large as the flow cross-section at the stopper closure 3.
  • the orifices 19 and 20 can of course be even smaller, since the stopper closure 3 exerts a corresponding control over the liquid metal portion flowing through per unit of time.
  • the plug seat on the plug closure 3 can be approximately 4400 mm 2, the inner diameter 21 of the area 15, for example, 95 mm diameter.
  • the orifices 19 and 20 have a flow cross section of approximately 2600 mm 2.
  • the values given relate to a continuous casting mold 22 (FIG. 2) with a casting oil of 50 mm ⁇ 1600 mm.
  • the conical transition 14 is made, similar to the mouth region 17, from a material which is resistant to thermal shock and is resistant to flowing steel, as described above, while the region 16 in which the mold level 23 is located is produced from a work tunnel which is resistant to the slag 24, which by the different hatching directions should be highlighted in the drawing.
  • the wall thickness 25 on the left and right of the flow cross section 26 is approximately 10 mm for a 50 mm wide pouring opening 27 of the continuous casting mold 22.

Abstract

PCT No. PCT/DE88/00172 Sec. 371 Date Sep. 19, 1989 Sec. 102(e) Date Sep. 19, 1989 PCT Filed Mar. 16, 1988 PCT Pub. No. WO88/06932 PCT Pub. Date Sep. 22, 1988.An immersion nozzle (2) for metallurgical recipients, in particular for a reservoir arranged upstream of a continuous casting ingot mould, has an interchangeable discharge pipe (2) which can be attached in a leakproof manner on or in a perforated brick (1). To improve the flow conditions and hence the efficiency of the casting, the inlet side of the nozzle comprises an upper elongated section (12) in the form of a tubular shaft (11) which expands conically downward to a given plane and which is narrow in a plane perpendicular to the given plane. A second elongate section (13) ends in an elongated transverse flow section of given dimensions.

Description

Die Erfindung betrifft einen Tauchausguß für metallurgische Gefäße, insbesondere für einen einer Stranggießkokille vorgeordneten Vorratsbehälter gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to an immersion nozzle for metallurgical vessels, in particular for a storage container arranged upstream of a continuous casting mold, according to the preamble of claim 1.

Der Grundkörper eines solchen Ausgießrohres besteht aus Tonerde-Graphit-Materialien mit hohem Verschleißwiderstand gegen flüssigen Stahl und Schutz der Graphit-Komponente vor Ausbrand und Lösung im Stahl.The basic body of such a pouring tube consists of alumina-graphite materials with high wear resistance against liquid steel and protection of the graphite component against burnout and solution in the steel.

Ausgießrohre in der Ausführungsform als Tauchausgüsse für sog. Brammenquerschnitte, d.h. z.B. Querschnitte von 300 mm x 2600 mm bedürfen hinsichtlich ihrer Gießleistung einer geeigneten geometrischen Ausbildung. Bei sog. Jumbo-Tauchausgüssen wird zur Aufrechterhaltung der geforderten Gießleistung der Innenquerschnitt so groß ausgebildet, daß Tonerdeablagerungen nicht zu Einschränkungen der Gießgeschwindigkeit führen. Bei kleiner werdenden Kokillenquerschnitten, z.B. 50 mm Kokillenbreite, müssen notgedrungen die Abmessungen und damit die Strömungsquerschnitte eines Tauchausgusses vermindert werden.Pouring tubes in the embodiment as immersion spouts for so-called slab cross sections, i.e. e.g. Cross sections of 300 mm x 2600 mm require a suitable geometric design with regard to their casting performance. In so-called jumbo immersion spouts, the internal cross section is made so large that the required casting performance is maintained that alumina deposits do not lead to restrictions in the casting speed. As mold cross sections become smaller, e.g. 50 mm mold width, the dimensions and therefore the flow cross-sections of an immersion nozzle must be reduced.

Es ist bekannt (DE-PS 21 05 881), die Einströmgeschwindigkeit des Gießstrahles in die Stranggießkokille mit einem sich in Gießrichtung konisch erweiternden Ausgießrohr herabzusetzen und über den Querschnitt der Kokille zu vergleichmäßigen. Ein solches Ausgießrohr ist jedoch bevorzugt nur bei kleinen bis mittleren Strangformaten und kleinen Brammen mit den Abmessungen bis 350 x 250 mm und 1000 x 300 mm anwendbar.It is known (DE-PS 21 05 881) to reduce the flow velocity of the pouring jet into the continuous casting mold with a pouring tube which widens conically in the casting direction and to make it uniform over the cross section of the mold. However, such a pouring tube can preferably only be used in the case of small to medium strand formats and small slabs with dimensions of up to 350 x 250 mm and 1000 x 300 mm.

Aufgabe der Erfindung ist es daher, den eingangs genannten Tauchausguß so auszubilden, daß beim Stranggießen flacher Brammen mit großer Breite eine günstige Strömungsverteilung in der Kokille bei hoher Gießleistung erreichbar ist.The object of the invention is therefore to design the immersion nozzle mentioned at the outset in such a way that a favorable flow distribution in the mold can be achieved with high casting performance when continuously casting flat slabs with a large width.

Gelöst wird diese Aufgabe erfindungsgemäß mit den Merkmalen im Kennzeichen des Patentanspruchs 1.This object is achieved according to the invention with the features in the characterizing part of patent claim 1.

Mit dem erfindungsgemäßen Tauchausgußist es möglich, bei dem vorgegebenen Längen-/Breitenverhältnis von 20 : 1 bis 80 : 1 die bisherige Gießleistung auch in sehr schmalen Stranggießkokillen aufrechtzuerhalten.With the immersion nozzle according to the invention, it is possible to maintain the previous casting performance even in very narrow continuous casting molds with the specified length / width ratio of 20: 1 to 80: 1.

Ein weiterer Vorteil besteht durch das Zusammenwirken mit einer glattwandigen Stranggießkokille, deren Herstellkosten entsprechend niedrig sind.Another advantage is the interaction with a smooth-walled continuous casting mold, the manufacturing costs of which are correspondingly low.

Eine günstige Strömungsverteilung wird außerdem dadurch erzielt, daß der obere Längenabschnitt im Querschnitt rund ist und der untere Längenabschnitt im Querschnitt rechteckig, wobei zwischen beiden Längenabschnitten ein konischer Übergang vorgesehen ist.A favorable flow distribution is also achieved in that the upper longitudinal section is round in cross section and the lower longitudinal section is rectangular in cross section, a conical transition being provided between the two longitudinal sections.

In weiterer Verbesserung der Erfindung ist vorgesehen, daß zumindest die Wanddicke des unteren Längenabschnittes maximal 10 mm beträgt.In a further improvement of the invention it is provided that at least the wall thickness of the lower length section is a maximum of 10 mm.

Eine andere Verbesserung der Erfindung sieht vor, daß der untere Längenabschnitt zumindest teilweise aus einem feuerfesten, thermoschockbeständigen und gegenüber Gießpulverschlacke resistenten Werkstott besteht, wobei als Hauptbestandteil Zirkonoxid und als Zusätze Graphit und/oder Siliziumcarbid und/oder Bornitrid und/oder hochschmelzende Metalle und/oder hochschmelzende Metalluerbindungen vorgesehen sind.Another improvement of the invention provides that the lower length section is at least partially made of a refractory, thermal shock-resistant and resistant to powder slag Werkstott exists, zirconium oxide being the main constituent and graphite and / or silicon carbide and / or boron nitride and / or refractory metals and / or refractory metal bonds being provided as additives.

Eine die fachgerechte Fertigung des Ausgießrohres betreffende Maßnahme besteht darin, daß der obere Längenabschnitt und der untere Längenabschnitt mittels teilbaren Kernsegmenten herstellbar sind. Bei besonders extrem schmalen unteren Längenabschnitten ist die Durchflußöffnung entsprechend schmal und kann bis zu 10 mm und weniger betragen. Hierzu wird vorteilhafterueise ein strömungsgerecht konstruierter Hohlraum mittels zusammengesetzten Kernsegmenten hergestellt.One measure relating to the professional manufacture of the pouring tube is that the upper longitudinal section and the lower longitudinal section can be produced by means of divisible core segments. In the case of particularly extremely narrow lower longitudinal sections, the flow opening is correspondingly narrow and can be up to 10 mm and less. For this purpose, a flow-oriented cavity is advantageously produced by means of assembled core segments.

Bei Wanddicken von ca. 10 mm ist die Herstellung eines solchen Ausgießrohres sorgfältig und unter Beachtung einer besonderen Technologie durchzuführen. Aus diesem Grund soll der Stahlkern einen axial entfernbaren Zentralkern und jeweils durch die Mundungsöffnungen ausziehbare Seitenkerne sowie in das Zentrum verlagerbare und dann von dort ebenfalls axial ausziehbare Nebenkerne aufweisen. Diese Maßnahmen sichern eine zerstörungs- und beschädigungsfreie Entfernung des Stahlkerns beim Herstellen des Ausgießrohres.With a wall thickness of approx. 10 mm, the production of such a pouring tube must be carried out carefully and in accordance with a special technology. For this reason, the steel core should have an axially removable central core and side cores that can be pulled out through the mouth openings as well as secondary cores that can be moved into the center and then also axially pulled out from there. These measures ensure non-destructive and damage-free removal of the steel core when manufacturing the pouring pipe.

Bei der Herstellung des Ausgießrohres ist vorteilhaft, daß die Feuerfest-Masse um den Stahlkern isostatisch gepreßt wird in der Weise, daß sich die beim Pressen auftretenden Kräfte stets auf dem Zentralkern abstutzen.In the production of the pouring tube, it is advantageous that the refractory mass is pressed isostatically around the steel core in such a way that the forces occurring during the pressing are always supported on the central core.

Ein Ausfuhrungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben.An exemplary embodiment of the invention is shown in the drawing and is described in more detail below.

Es zeigen

  • Fig. 1 einen senkrechten Langsschnitt für das in Betriebslage befindliche Ausgießrohr (für eine Stopfenregelung dargestellt)
  • Fig. 2 einen horizontalen Querschnitt entsprechend dem Schnittverlauf II - II in Fig. 1,
  • Fig. 3 einen zur Ebene der Fig. 1 senkrechten Längsschnitt entsprechend dem Schnittverlauf III - III in Fig. 1 und
Show it
  • 1 is a vertical longitudinal section for the pouring tube in the operating position (shown for a stopper control)
  • 2 shows a horizontal cross section corresponding to the section line II-II in FIG. 1,
  • 3 shows a longitudinal section perpendicular to the plane of FIG. 1 corresponding to the section III - III in FIGS. 1 and

An einem Lochstein 1 eines Vorratsbehälters wird das Ausgießrohr 2, das im folgenden auch als Tauchausguß 2a bezeichnet wird, befestigt. Die Befestigungsart bzw. die Befestigungsmittel sind davon abhängig, ob ein Stopfenverschluß 3 oder ein (nicht dargestellter) Schieberverschluß verwendet wird. Im gezeichneten Ausführungsbeispiel ist für den Stopfenverschluß 3 in dem Lochstein 1 ein Einlaufrohr 4 eingebettet, das den Blechmantel 5 durchdringt und an seinem unteren Ende 4a sphärisch geformt ist. In einer Nut 6 ist eine erste Halteplatte 7 seitlich eingeschoben. Unter eines Flansch 2b des Ausgießrohrs 2 greift eine zweite Halteplatte 8 ein, die mittels paarweise vorgesehenen Gewindeschrauben 9 das Ausgießrohr 2 bzw. den Flansch 2b gegen das sphärisch geformte Ende 4a des Einlaufrohres 4 preßt. Hierbei ist durch die der sphärischen Form des Einlaufrohr-Endes 4a angepaßte konkave Innenform 2c ein Dichtsitz 10 geschaffen.The pouring pipe 2, which is also referred to below as immersion spout 2a, is fastened to a perforated brick 1 of a storage container. The type of fastening or the fastening means depend on whether a plug closure 3 or a slide closure (not shown) is used. In the illustrated embodiment, an inlet pipe 4 is embedded for the plug closure 3 in the perforated brick 1, which penetrates the sheet metal jacket 5 and is spherically shaped at its lower end 4a. A first holding plate 7 is inserted laterally in a groove 6. Under a flange 2b of the pouring pipe 2, a second holding plate 8 engages, which presses the pouring pipe 2 or the flange 2b against the spherically shaped end 4a of the inlet pipe 4 by means of threaded screws 9 provided in pairs. In this case, a sealing seat 10 is created by the concave inner shape 2c adapted to the spherical shape of the inlet pipe end 4a.

Das Ausgießrohr 2, das in den Fig. 1, 2 und 3 als Tauchausguß 2a dargestellt ist, bildet unterhalb der Halteplatte 8 einen Rohrschaft 11, der in einen oberen Langenabschnitt 12 und einen unteren Längenabschnitt 13 konstruktiv eingeteilt ist. Fig. 1 bildet hierzu eine erste Längsschnittebene, in der der obere Längenabschnitt 12, von einem konischen Übergang 14 abgesehen, im Bereich 15 schmal ist und der untere Längenabschnitt 13 gegenüber dem schmaten Bereich 15 einen um ein Vielfaches breiteren Bereich 16 aufweist. Der Unterschied der Breiten zwischen den Bereichen 15 und 16 ergibt sich aus dem Längen-/Breitenverhältnis von 20 : 1 bis 80 : 1 im Mündungsbereich 17 gegenüber dem Strömungsquerschnitt 18 des Einlaufrohres 4. Die seitlichen Mündungsöffnungen 19 und 20 weisen zusammen einen Strömungsquerschnitt auf, der nicht ganz so groß ist wie der Strömungsquerschnitt am Stopfenverschluß 3. Die Mündungsöffnungen 19 und 20 können selbstverständlich noch kleiner sein, da über den Stopfenverschluß 3 eine entsprechende Kontrolle über den pro Zeiteinheit durchströmenden Flüssigmetallanteil ausgenübt wird. Zum Beispiel kann der Stopfensitz am Stopfenverschluß 3 ca. 4400 mm2 betragen, der Innendurchmesser 21 des Bereichs 15 z.B. 95 mm Durchmesser. In einem solchen Fall besitzen die Mündungsöffnungen 19 und 20 einen Strömungsquerschnitt von ca. 2600 mm2. Die angegebenen Werte beziehen sich auf eine Stranggießkokille 22 (Fig. 2) mit einer Gießöllnung von 50mm x 1600 mm.The pouring pipe 2, which is shown in FIGS. 1, 2 and 3 as immersion spout 2a, forms below the holding plate 8 a tubular shaft 11 which is structurally divided into an upper longitudinal section 12 and a lower longitudinal section 13. For this purpose, FIG. 1 forms a first longitudinal sectional plane in which the upper longitudinal section 12, apart from a conical transition 14, is narrow in the region 15 and the lower one Longitudinal section 13 has a much wider area 16 than the narrow area 15. The difference in widths between areas 15 and 16 results from the length / width ratio of 20: 1 to 80: 1 in the mouth area 17 compared to the flow cross section 18 of the inlet pipe 4. The lateral mouth openings 19 and 20 together have a flow cross section that is not quite as large as the flow cross-section at the stopper closure 3. The orifices 19 and 20 can of course be even smaller, since the stopper closure 3 exerts a corresponding control over the liquid metal portion flowing through per unit of time. For example, the plug seat on the plug closure 3 can be approximately 4400 mm 2, the inner diameter 21 of the area 15, for example, 95 mm diameter. In such a case, the orifices 19 and 20 have a flow cross section of approximately 2600 mm 2. The values given relate to a continuous casting mold 22 (FIG. 2) with a casting oil of 50 mm × 1600 mm.

Der konische Übergang 14 ist ähnlich wie der Mündungsbereich 17 aus einem wie vorstehend beschriebenen thermoschockbeständigen und gegenüber fließendem Stahl beständigen Werkstoff hergestellt, währenddem der Bereich 16, in dem sich der Gießspiegel 23 befindet, aus einem gegen die Schlacke 24 resistenten Werkstoll hergestellt ist, was durch die unterschiedlichen Schraffurrichtungen in der Zeichnung hervorgehoben werden soll.The conical transition 14 is made, similar to the mouth region 17, from a material which is resistant to thermal shock and is resistant to flowing steel, as described above, while the region 16 in which the mold level 23 is located is produced from a work tunnel which is resistant to the slag 24, which by the different hatching directions should be highlighted in the drawing.

Gemäß Fig. 2 sind die Verhältnisse dargestellt, die im unteren Längenabschnitt 13 durch die Abmessungen bestimmt werden. So betragt die Wanddicke 25 links und rechts des Strömungsquerschnitts 26 ca. 10 mm fur eine 50 mm breite Eingießöffnung 27 der Stranggießkokille 22.2 shows the relationships that are determined in the lower length section 13 by the dimensions. The wall thickness 25 on the left and right of the flow cross section 26 is approximately 10 mm for a 50 mm wide pouring opening 27 of the continuous casting mold 22.

Wie aus Fig. 3 ersichtlich ist, befindet sich am Rohrschalt 11 eine Argon-Zufuhr 28 mit einem eingelassenen Rohranschluß 29 und einem Verstärkungsring 30.As can be seen from FIG. 3, there is an argon feed 28 on the tube switch 11 with an embedded tube connection 29 and a reinforcing ring 30.

Claims (5)

1. An immersion nozzle for metallurgical vessels, in particular for a storage vessel preceding a continuous casting mould, to which vessel the immersion nozzle is attached, for casting thin strands, the immersion nozzle on the mouth side consisting of an upper long section in the form of a tubular shaft which widens conically at the bottom,
characterised in that
the immersion nozzle (2) widens conically at the bottom towards the lateral mouth openings (19, 20) only in a plane and is narrow in a plane perpendicular thereto and merges into a second long section (13) with an elongated flow cross-section which extends over the height and which has a length-to-width ratio of 20 : 1 to 80 : 1 in the region of the mouth (17).
2. An immersion nozzle according to Claim 1,
characterised in that
the upper long section (12) is of round cross-section and the lower long section (13) is of rectangular cross-section, with a conical transition (14) being provided between both long sections (12, 13).
3. An immersion nozzle according to Claims 1 and 2,
characterised in that
at least the wall thickness (25) of the lower long section (13) is at most 10 mm.
4. An immersion nozzle according to Claims 1 to 3,
characterised in that
the lower long section (13) is made at least in part of a fireproof, heat shock-resistant material which is resistant to casting powder slag, with zirconium oxide being provided as the main constituent and graphite and/or silicon carbide and/or boron nitride and/or metals having high melting points and/or metal compounds having high melting points being provided as additives.
5. A process for producing the immersion nozzle according to one or more of Claims 1 to 4,
characterised in that
the fireproof material is isostatically pressed around a steel core in such a manner that the forces occurring during pressing are always supported on the central portion of the steel core.
EP88902787A 1987-03-20 1988-03-16 Immersion nozzle for metallurgical recipients Expired - Lifetime EP0351414B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88902787T ATE69002T1 (en) 1987-03-20 1988-03-16 IMMERSION NOZZLE FOR METALLURGICAL VESSELS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873709188 DE3709188A1 (en) 1987-03-20 1987-03-20 POURING PIPE FOR METALLURGICAL VESSELS
DE3709188 1987-03-20

Publications (2)

Publication Number Publication Date
EP0351414A1 EP0351414A1 (en) 1990-01-24
EP0351414B1 true EP0351414B1 (en) 1991-10-30

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Application Number Title Priority Date Filing Date
EP88902787A Expired - Lifetime EP0351414B1 (en) 1987-03-20 1988-03-16 Immersion nozzle for metallurgical recipients

Country Status (9)

Country Link
US (1) US5314099A (en)
EP (1) EP0351414B1 (en)
JP (1) JP2646022B2 (en)
KR (1) KR960015336B1 (en)
AT (1) ATE69002T1 (en)
CA (1) CA1318105C (en)
DE (2) DE3709188A1 (en)
WO (1) WO1988006932A1 (en)
ZA (1) ZA881887B (en)

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JPH04300050A (en) * 1991-03-28 1992-10-23 Nippon Steel Corp Biroll type sheet casting method
DE4116723C2 (en) * 1991-05-17 1999-01-21 Mannesmann Ag Diving spout
DE4142447C3 (en) * 1991-06-21 1999-09-09 Mannesmann Ag Immersion nozzle - thin slab
KR100221695B1 (en) * 1991-08-12 1999-09-15 그린 마틴, 브라이언 쥐 테슬리 Pharmaceutical spheroid formulation
JPH07503905A (en) * 1992-02-20 1995-04-27 ブリティッシュ、スティール、リミテッド Method and apparatus for injecting molten metal
DE4300505C2 (en) * 1993-01-06 1995-08-24 Mannesmann Ag Immersion pouring tube for metallurgical vessels
DE4320723A1 (en) * 1993-06-23 1995-01-05 Didier Werke Ag Immersion spout
DE4403048C1 (en) * 1994-01-28 1995-07-13 Mannesmann Ag Continuous caster and process for producing rectangular thin slabs
DE4403049C1 (en) * 1994-01-28 1995-09-07 Mannesmann Ag Continuous caster and method for producing thin slabs
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US5785880A (en) * 1994-03-31 1998-07-28 Vesuvius Usa Submerged entry nozzle
IT1267284B1 (en) * 1994-08-08 1997-01-28 Danieli Off Mecc CONTINUOUS CASTING UNLOADER
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KR890700413A (en) 1989-04-24
DE3709188A1 (en) 1988-09-29
ZA881887B (en) 1989-03-29
KR960015336B1 (en) 1996-11-09
WO1988006932A1 (en) 1988-09-22
ATE69002T1 (en) 1991-11-15
JP2646022B2 (en) 1997-08-25
DE3709188C2 (en) 1990-07-26
JPH02502706A (en) 1990-08-30
US5314099A (en) 1994-05-24
EP0351414A1 (en) 1990-01-24
DE3865964D1 (en) 1991-12-05
CA1318105C (en) 1993-05-25

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