EP0102292B1 - Rohre für das Giessen von schmelzflüssigem Metall - Google Patents

Rohre für das Giessen von schmelzflüssigem Metall Download PDF

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Publication number
EP0102292B1
EP0102292B1 EP83401659A EP83401659A EP0102292B1 EP 0102292 B1 EP0102292 B1 EP 0102292B1 EP 83401659 A EP83401659 A EP 83401659A EP 83401659 A EP83401659 A EP 83401659A EP 0102292 B1 EP0102292 B1 EP 0102292B1
Authority
EP
European Patent Office
Prior art keywords
tube
casting
casting tube
accordance
molten metal
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
Application number
EP83401659A
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English (en)
French (fr)
Other versions
EP0102292A2 (de
EP0102292A3 (en
Inventor
Jean Charles Daussan
Gérard Daussan
André Daussan
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.)
Daussan SAS
Original Assignee
Daussan SAS
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4286064&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0102292(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Daussan SAS filed Critical Daussan SAS
Priority to AT83401659T priority Critical patent/ATE22826T1/de
Publication of EP0102292A2 publication Critical patent/EP0102292A2/de
Publication of EP0102292A3 publication Critical patent/EP0102292A3/fr
Application granted granted Critical
Publication of EP0102292B1 publication Critical patent/EP0102292B1/de
Expired 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
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/24—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings characterised by a rectilinearly movable plate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles

Definitions

  • the present invention relates to pouring tubes for the conduct of liquid metal in a transfer operation thereof.
  • the present invention aims to eliminate the drawbacks listed above.
  • the pouring tube composed of a thin external metallic casing and an internal coating of sinterable insulating material at the temperatures in play, its upper end being fixed in a substantially sealed manner to the outlet orifice of a liquid metal container, the lower end of the pouring tube immersed in the liquid metal of a second container located downstream from the first, is characterized in that it comprises, in combination with the external metal envelope, a reinforcement of tubular reinforcement embedded in the coating material, this reinforcement extending in height over the part of the tube in contact with the liquid metal, substantially from the lower edge of the sintered tube immersed in the bath of liquid steel up to a region above the level of this liquid.
  • the reinforcing reinforcement consists of a metal sleeve associated with anchoring means, such as a perforated sheet or a mesh.
  • the reinforcing reinforcement may also consist of a layer of a mechanically resistant material distinct from the coating material, such as woven fibers - or not, or a tubular layer of mineral and / or organic grains joined together by a binding, organizing - or not.
  • the inner coating of the tube can be an acid or basic sinterable material.
  • the pouring tube thus arranged can receive various applications.
  • it can be mounted under the outlet orifice of a container for molten metal such as a ladle or a transfer container and be part in particular of a drawer system which can be moved transversely relative to the axis of the tube.
  • the tube can also constitute a removable nozzle engaged at the top of a pouring tube proper and connecting the latter, in leaktight manner, to the orifice of the casting container located upstream.
  • FIG. 1 which represents a complete continuous casting system, we see at 10 the base of the ladle, lined with its refractory lining 12, at 22 the sinterable insulating refractory and at 23 the seat brick of the fixed nozzle 21.
  • the orifice of the nozzle 21 can be concealed by a sliding shutter, the moving plate of which is seen at 30 and the fixed plate at 35, both pierced with an orifice for the passage of the metal.
  • the shutter is in the closed position in FIG. 1.
  • the pouring tube 3 which can slide transversely to its axis at the same time as the plate 30 and a removable connection nozzle 19 mounted in leaktight manner thanks to a refractory cement joint between the plate 30 which allows its mounting and the upper part of the tube 3 where it is engaged.
  • the nozzle 19 is supported, in the example shown, on an inner hoop 17, metallic and / or refractory formed at the top of the pouring tube 3.
  • the tube 3 is located between the ladle 10 and the tundish 13, commonly called “tundish”. This in turn carries a pouring tube 4 - or nozzle - which can also belong to a drawer system and which is located between the distributor 13 and the continuous casting mold 15.
  • the invention is applied both to the pouring tubes 3 and 4 and to the connection nozzle 19.
  • the tubes 3 and 4 are thus constituted respectively by a thin outer metal casing 1 and 2 whose thickness is of the order of a millimeter.
  • the thin metal casing 1 has an annular boss 7 which comes to bear on the sliding support 8.
  • the metal envelopes 1 and 2 are lined inside a coating of sinterable insulating material 3a and 4a, acid or basic, the density of which can vary from 0.7 to 2.
  • the frame 5 or 6 can preferably be made using a steel sheet about 2 mm thick provided with anchoring means; it may, in particular, include perforations with a diameter of 10 mm, themselves spaced 5 mm apart. It can also be a wire mesh.
  • the reinforcement 5 or 6 can also be produced by means of a layer of fibers constituting a nonwoven and / or of a tubular layer of mineral and / or organic grains joined together by an organic or mineral binder.
  • the reinforcement considered can also be made by means of a fabric of fibers, for example mineral fibers. In all cases, the reinforcement must be mechanically resistant with respect to the material of the coating of the tube within which it is incorporated.
  • the thickness of the armature is advantageously between 0.3 and 15 mm depending on the thickness of the coating 3a or 4a of the pouring tube.
  • the height of the reinforcements 5 and 6 is such that it reaches - or preferably exceeds - the upper level of the cast metal coming into contact with the outside of the tube.
  • the removable interior nozzle 19 of the pouring tube 3 is also produced in accordance with the present invention and comprises (FIG. 3) an internal reinforcement frame 31 similar to the frames 5 and 6 and which extends over the entire height of this nozzle.
  • the nozzle 19 is thus composed of a solid and / or perforated metal envelope 20 lined internally with sinterable refractory insulating material 19a similar to the coatings 3a and 4a and in which the frame 31 is embedded.
  • the distributor 13 is shown with liquid metal 14 filling it up to level NN1.
  • the continuous casting ingot mold 15 is shown with its metal ingot 16 being solidified.
  • the mode of action of the means provided for the invention is the following (see FIG. 2).
  • the tubular region 26 of the coating 3a located behind the thin outer metal casing 1 can only sinter when the corresponding part of this metal casing 1 has melted approximately along the line 1 b located near level N-N1.
  • the inner face 24 of the pouring tube which is substantially in contact with the metal jet, progressively sintered during the sequential casting (s) until the sintering reaches the sintered part 26.
  • This progressive sintering of the mass of the coating 3a is only possible thanks to the internal frame 5 which while strengthening the plunging part of the tube allows it to undergo this transformation without risk of rupture.
  • Figure 1 shows the pouring tubes 3 and 4 just before the lower part of their metal casing 1 and 2 has melted.
  • the sintering process does not generally reach a sufficient degree of progress at this time so that the plunging end of the tube, assumed to be homogeneous, can withstand the effect of internal pressure and turbulence of liquid steel, which occur at this location.
  • the reinforcing reinforcements such as 5, 6 or 31, embedded in the sinterable material, provide the necessary relay to allow the completion without breaking of the sintering process.
  • the cutting of the plunging end of the tube which normally occurred along line 1b is then eliminated, which avoids any contact of the metal with the ambient air.
  • the reinforcement provided by the invention while remaining coaxial with the pouring tube, must be adapted to the shape of the latter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Continuous Casting (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Ceramic Products (AREA)

Claims (9)

1. Gießrohr (3, 4, 19), bestehend aus einem dünnen äußeren Metallmantel (1, 2, 20) und einer inneren Auskleidung (3a, 4a, 19a) aus einem wärmeisolierendem, bei den auftretenden Temperaturen sinternden Werkstoff, wobei das obere Gießrohrende abgedichtet an der Auslauföffnung eines Metallschmelzebehälters (10, 13) befestigt ist und das untere Gießrohrende in die Metallschmelze in einem unter dem ersten Schmelzebehälter befindlichen zweiten Behälter (13, 15) eintaucht, dadurch gekennzeichnet, daß das Gießrohr in Verbindung mit dem äußeren Metallmantel (1, 2, 20) eine rohrförmige Verstärkung (5, 6, 31) umfaßt, die in den Auskleidungswerkstoff eingebettet ist und sich der Höhe nach über den in Berührung mit der Metalischmelze befindlichen Teli des Rohres, im wesentiichen von dem unteren Rand des in das Stahlschmelzebad eintauchenden Sinterrohres an bis zu einem oberhalb des Niveaus (NNI) dieser Schmelze liegenden Bereich, erstreckt.
2. Gießrohr nach Anspruch 1, dadurch gekennzeichnet, daß die Verstärkung (5,6,31) aus einer Metallmanschette in Verbindung mit Verankerungsmitteln wie etwa einem Lochblech oder einem Gitter besteht.
3. Gießrohr nach Anspruch 1, dadurch gekennzeichnet, daß die Verstärkung aus einer Schicht aus einem mechanisch widerstandsfähigen und von dem Auskleidungswerkstoff verschiedenen Werkstoff, wie verwebten oder unverwebten Fasern, oder einer rohrförmigen Schicht aus mineralischen und/oder organischen Körnern, die gegebenenfalls durch ein organisches Bindemittel zusammengehalten werden, besteht.
4. Gießrohr nach einem der Ansprüche 1, 2 oder 3, dadurch gekennzeichnet, daß der wärmeisolierende, sinterbare Werkstoff der inneren Auskleidung (3a, 4a, 19a) sauer ist, eine Dichte zwischen 0,7 und 2 hat und der folgenden Zusammensetzung entspricht:
- Si02 ....... 80 bis 95 %
- CaO........ 0 bis 2 % im Zustand
- Al203 ...... 0 bis 2 % anorganischer Fasern
- Bindemittel wie etwa
. Phenol-Formol
. Harnstoff-Formol
. Kunstharz.... 0,5 bis 3 %
- organische Fasern.... 0 bis 3 %
- Restwasser,
wobei der Materialverlust im Feuer vorteilhaft kleiner als 6 % ist.
5. Gießrohr nach einem der Ansprüche 1, 2 oder 3, dadurch gekennzeichnet, daß der wärmeisolierende, sinterbare Werkstoff der inneren Auskleidung (3a, 4a, 19a) eine Lichte zwischen 0,7 und 2 hat, basisch ist und der folgenden Zusammensetzung entspricht:
- MgO............ 60 bis 90 %
- CaO............. 0 bis 3 %
- Si02............. 0 bis 20 %
- Fe203........... 0 bis 4 %
- Bindemittel (wie zuvor)...0,5 bis 3 %
- organische Fasern...... 0 bis 3 %
- Restwasser,
wobei der Materialverlust im Feuer vorteilhaft kleiner als 6 % ist
6. Gießrohr nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß es unter die Auslaßöffnung eines Behälters für geschmolzenes Metall wie etwa eine Gießpfanne oder einen Zwischenbehälter montiert ist.
7. Gießrohr nach Anspruch 6, dadurch gekennzeichnet, daß es Teil eines Verschlußsystems mit quer zur Achse des Rohres verschiebbarem Schieber ist.
8. Gießrohr nach Anspruch 6, dadurch gekennzeichnet, daß es eine auswechselbare Verbindungsdüse (19) bildet, die in den oberen Teil eines eigentlichen Gießrohres eingreift und dieses dicht mit der Öffnung des darüberliegenden Schmelzebehälters verbindet.
EP83401659A 1982-08-23 1983-08-12 Rohre für das Giessen von schmelzflüssigem Metall Expired EP0102292B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83401659T ATE22826T1 (de) 1982-08-23 1983-08-12 Rohre fuer das giessen von schmelzfluessigem metall.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4992/82A CH650176A5 (fr) 1982-08-23 1982-08-23 Dispositif pour la coulee du metal fondu.
CH4992/82 1982-08-23

Publications (3)

Publication Number Publication Date
EP0102292A2 EP0102292A2 (de) 1984-03-07
EP0102292A3 EP0102292A3 (en) 1984-07-11
EP0102292B1 true EP0102292B1 (de) 1986-10-15

Family

ID=4286064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83401659A Expired EP0102292B1 (de) 1982-08-23 1983-08-12 Rohre für das Giessen von schmelzflüssigem Metall

Country Status (6)

Country Link
US (1) US4792070A (de)
EP (1) EP0102292B1 (de)
AT (1) ATE22826T1 (de)
AU (1) AU569254B2 (de)
CH (1) CH650176A5 (de)
DE (2) DE3366855D1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8422486D0 (en) * 1984-09-06 1984-10-10 Foseco Trading Ag Pouring tubes
FR2617157B1 (fr) * 1987-06-26 1991-01-11 Vesuvius Crucible Co Revetement isolant pour corps refractaires, procede de revetement et article associes
US4951852A (en) * 1988-06-23 1990-08-28 Gilbert Rancoulle Insulative coating for refractory bodies
JP3420263B2 (ja) * 1992-09-02 2003-06-23 黒崎播磨株式会社 連続鋳造用ノズルの支持構造
JPH06134557A (ja) * 1992-10-23 1994-05-17 Tokyo Yogyo Co Ltd 溶融金属収容容器用スライディングノズル
GB9222453D0 (en) * 1992-10-26 1992-12-09 Shaw Richard D Improved device for use in continuous casting
US5348275A (en) * 1993-07-26 1994-09-20 Magneco/Metrel, Inc. Tundish nozzle assembly block
DE102004057381A1 (de) * 2004-11-26 2006-06-01 Heraeus Electro-Nite International N.V. Verfahren zur Regelung des Durchflusses sowie Bodenausguss für ein metallurgisches Gefäß
AU2007249057B2 (en) * 2004-11-26 2010-08-12 Rhi Ag Regulation method for throughflow and bottom nozzle of a metallurgical vessel
JP5116852B2 (ja) * 2010-03-30 2013-01-09 明智セラミックス株式会社 鋳造ノズル
JP6829930B2 (ja) 2016-08-09 2021-02-17 エーケー スティール プロパティ−ズ、インク． タンディッシュ漏斗

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US1997988A (en) * 1932-08-27 1935-04-16 Ajax Electrothermic Corp Furnace lining protection
GB583050A (en) * 1944-05-02 1946-12-05 Brassert & Co Improvements relating to bessemer converters
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FR2333599A1 (fr) * 1975-12-02 1977-07-01 Daussan Henri Dispositif a element tubulaire pour la coulee des metaux fondus
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FR2433995A1 (fr) * 1978-08-24 1980-03-21 Daussan & Co Procede et dispositif pour deboucher l'orifice de coulee d'un recipient metallurgique
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BE881486A (fr) * 1980-01-31 1980-07-31 Hainaut Sambst Perfectionnement aux dispositifs de coulee d'acier liquide
JPS5727967A (en) * 1980-07-18 1982-02-15 Nippon Steel Corp Dipping nozzle for continuous casting
JPS5738380A (en) * 1980-08-20 1982-03-03 Kamogawa Kogyo Kk Tundish lining material for continuous casting
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US4423833A (en) * 1981-01-16 1984-01-03 Didier-Werke A.G. Refractory immersion spout
FR2506641A1 (fr) * 1981-05-27 1982-12-03 Daussan & Co Tube de coulee et son procede de fabrication
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JP2002001566A (ja) * 2000-06-16 2002-01-08 Matsushita Electric Ind Co Ltd レーザ加工装置及びレーザ加工方法

Also Published As

Publication number Publication date
US4792070A (en) 1988-12-20
DE102292T1 (de) 1984-07-19
EP0102292A2 (de) 1984-03-07
CH650176A5 (fr) 1985-07-15
EP0102292A3 (en) 1984-07-11
AU569254B2 (en) 1988-01-28
ATE22826T1 (de) 1986-11-15
AU1811183A (en) 1984-03-01
DE3366855D1 (en) 1986-11-20

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