EP0904170B1 - Vertikal stranggusskokille mit aufsatz - Google Patents

Vertikal stranggusskokille mit aufsatz Download PDF

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Publication number
EP0904170B1
EP0904170B1 EP97916507A EP97916507A EP0904170B1 EP 0904170 B1 EP0904170 B1 EP 0904170B1 EP 97916507 A EP97916507 A EP 97916507A EP 97916507 A EP97916507 A EP 97916507A EP 0904170 B1 EP0904170 B1 EP 0904170B1
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EP
European Patent Office
Prior art keywords
annulus
ring
refractory
mould
pct
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97916507A
Other languages
English (en)
French (fr)
Other versions
EP0904170A1 (de
Inventor
Jean-Marc Jolivet
Eric Perrin
Cosimo Salaris
Jacques Spiquel
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.)
Forges et Acieries de Dilling SA
Ascometal SA
Sollac SA
Ugitech SA
Sogepass
Original Assignee
Forges et Acieries de Dilling SA
Ascometal SA
Sollac SA
Ugine Savoie Imphy SA
Sogepass
Lorraine de Laminage Continu SA SOLLAC
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 Forges et Acieries de Dilling SA, Ascometal SA, Sollac SA, Ugine Savoie Imphy SA, Sogepass, Lorraine de Laminage Continu SA SOLLAC filed Critical Forges et Acieries de Dilling SA
Publication of EP0904170A1 publication Critical patent/EP0904170A1/de
Application granted granted Critical
Publication of EP0904170B1 publication Critical patent/EP0904170B1/de
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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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/0401—Moulds provided with a feed head

Definitions

  • the invention relates to Continuous Casting in Vertical Load of metals, and steel in particular.
  • the aim is thus to continuously pour better semi-finished products. quality and with high extraction speeds, or even higher than Classic Continuous Casting, because all hydrodynamic turbulence caused by the arrival of molten metal in the mold are indeed confined to the refractory riser so that below the solidification can begin and continue in an environment calm in which the cast steel progresses towards the exit of the ingot mold without significant velocity gradient in the section (so-called type flow "piston").
  • the sleeve made of highly insulating refractory material thermally, therefore generally in fibrous refractory and fairly little dense to prevent parasitic solidification on the inner wall of the sleeve by cooling the metal cast at its contact, and a smaller lower part aligned internally with the mold body, the ring, made of compact refractory material with good mechanical strength to resist erosion mechanics caused by the proximity of the nascent solidification point on the upper edge of the copper body in contact with the end of the enhances.
  • An example of a compact refractory material which may be suitable for this effect is SiAION (or Sialon®).
  • the aim of the present invention is to propose a solution which allows a very significant extension of the life of a ring refractory of this type, in order to make affordable the operating cost of a Continuous Load Casting machine, linked to the renewal of this ring.
  • the invention relates to a bi-material ingot mold for the Continuous casting in vertical load of metals, such as steel, comprising a metal body (copper or copper alloy) energetically cooled and defining a passage for the cast metal which it ensures, in contact with its inner wall, a peripheral solidification, and an extension in heat-insulating refractory material surmounting the body cooled metal intended to contain molten metal in the liquid state poured from a distributor placed above, an ingot mold characterized in that the extension is made up of two distinct refractory parts superimposed: an upper sleeve of refractory material having good thermal insulating properties and a lower material ring refractory with good mechanical properties and aligned internally with the mold body, and in that the ring is crimped in a reinforcing means of height less than that of the ring.
  • this reinforcing means is advantageously constituted by a crimping ring, preferably in steel, surrounding the ring.
  • the invention therefore consists in crimping the ring in hard refractory (in SiAION), -which otherwise would risk cracking, or even burst after only a few pours - by a reinforcement ring, in steel for example, which covers only the middle part of the periphery of the ring, in order to let a free portion of it protrude above and below the reinforcement ring.
  • hard refractory in SiAION
  • the lower edge of the ring in contact with the cast metal can be easily restored by surfacing the turned side towards the cooled metal body if degradation or spalling of the ring is noted.
  • the mold comprises, as can be seen, a tubular body in copper 4 energetically cooled by circulation of water along its face outside.
  • a steel jacket 5 is provided for channel this circulation and communicates at its ends with a introduction chamber 6 and with an evacuation chamber 7, delimited by a mantle 8 surrounding the cooled metal body 4 at a distance.
  • extension 9 made of refractory material uncooled, the inner wall of which is preferably aligned with that of the body 4.
  • the assembly "metallic body cooled 4 preceded by the 9 "insulating refractory riser, defines a passage for cast metal, the upper part of which in the riser is a containment zone 12 of the hydrodynamic disturbances caused by the arrival of the jet 11 of molten metal in the ingot mold, and the part of which lower, which extends it, is a zone 13 for solidification of the cast metal.
  • This solidification is initiated from the first contact of the steel cast with the inner wall of the body of cooled copper 4, namely on the upper edge 14 thereof, and continues downstream forming a solid crust 15 whose thickness increases from the periphery towards the center.
  • the crust 15 is strong enough to withstand ferrostatic pressure of the still liquid heart and continues its centripetal growth until total solidification of the cast semi-finished product 10 under the effect of the ramps not shown water sprinkler located in the lower half of the machine.
  • the semi-finished product is cut into sections of desired width (billets, blooms or slabs, depending on the format of the casting section) and these sections are then available for further processing (rolling, etc.).
  • This ring 17 for example made of SiAlON, doped with boron nitride of preferably, as marketed by the company VESUVIUS under the reference 531, is set in a metal ring 18 by mounting to hot in the workshop. This avoids the risk of cracking and bursting the ring which can appear, if not after a low number of flows, or even after each pour.
  • this ring crimping is dimensioned in width and placed around the ring of so as to let the latter exceed on either side of the limits of the Ring.
  • this provision allows, in case of degradation or flaking, to restore by surfacing the face 19 of the ring turned in gaze of the metallic body 4.
  • a surfacing operation consumes in thickness from 0.1 to 0.2 mm of material.
  • ring within the meaning of this specification, it is necessary hear not only a continuous strapping that can be put in place around a ring 17 of circular shape in the case of casting Continuous Vertical of long products (blooms, billets), but also any means of clamping ensuring the refractory ring mechanical reinforcement allowing it to better resist significant thermo-mechanical stresses that it undergoes due to the cyclical nature of the operations of casting.
  • this reinforcement means may then advantageously consist of a U-shaped flange compressing by its ends, the end faces of each segment, the current central part on the outside of the segment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Confectionery (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Heat Treatment Of Articles (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Claims (4)

  1. Aus zwei Materialien bestehende Kokille für den Strangguß von Metallen mit Aufsatz, wie zum Beispiel Stahl, mit einem heftig gekühlten metallischen Bauteil 4, das einen Durchlaß für das gegossene Metall 2 bildet, bei dessen Berührung seiner Innenwand eine Umfangserstarrrung 15 eintritt und mit einem Aufsatz 9 aus thermisch isolierendem feuerfesten Material, der das metallische Teil 4 überragt und der dazu dient, das in die Kokille eingefüllte schmelzflüssige Metall aufzunehmen, wobei der Aufsatz 9 aus zwei getrennten übereinander angeordneten innen zueinander ausgerichteten feuerfesten Bauteilen besteht: einem oberen Stutzen 16 aus einem feuerfesten Material, das im Hinblick auf seine guten thermisch isolierenden Eigenschaften ausgewählt ist und einem unteren Ring 17 aus einem feuerfesten Material, das im Hinblick auf seine mechanische Haltbarkeit ausgewählt ist, dadurch gekennzeichnet, dass der untere Ring 17 in ein Verstärkungsteil 18 eingesetzt ist, dessen Höhe geringer als diejenige des Ringes ist.
  2. Kokille nach Anspruch 1, dadurch gekennzeichnet, dass das Verstärkungsteil 18 in Mittelstellung bezüglich der Höhe des Ringes 17 zentriert ist.
  3. Kokille nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Verstärkungsteil ein Klemmreif 18 ist, der einen kreisförmigen Ring umgibt.
  4. Kokille nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Verstärkungsteil ein U-förmiger Bund ist, dessen Enden die Endteile eines Segmentes eines Ringes, der aus einer Vielzahl von benachbarten Segmenten besteht, zusammendrückt.
EP97916507A 1996-04-05 1997-03-27 Vertikal stranggusskokille mit aufsatz Expired - Lifetime EP0904170B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9604304 1996-04-05
FR9604304A FR2747061B1 (fr) 1996-04-05 1996-04-05 Lingotiere bi-materiau pour la coulee continue en charge verticale des metaux
PCT/FR1997/000545 WO1997037791A1 (fr) 1996-04-05 1997-03-27 Lingotiere bi-materiau pour la coulee continue en charge verticale des metaux

Publications (2)

Publication Number Publication Date
EP0904170A1 EP0904170A1 (de) 1999-03-31
EP0904170B1 true EP0904170B1 (de) 2000-11-22

Family

ID=9490958

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97916507A Expired - Lifetime EP0904170B1 (de) 1996-04-05 1997-03-27 Vertikal stranggusskokille mit aufsatz

Country Status (12)

Country Link
US (1) US6135197A (de)
EP (1) EP0904170B1 (de)
JP (1) JP2000508240A (de)
KR (1) KR20000005255A (de)
AT (1) ATE197684T1 (de)
AU (1) AU2513297A (de)
BR (1) BR9708507A (de)
CA (1) CA2258111A1 (de)
DE (1) DE69703582T2 (de)
ES (1) ES2152089T3 (de)
FR (1) FR2747061B1 (de)
WO (1) WO1997037791A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2764533B1 (fr) * 1997-06-12 1999-07-30 Lorraine Laminage Tete de lingotiere pour la coulee continue verticale en charge de produits metalliques a format allonge
BE1012325A3 (fr) * 1998-12-08 2000-09-05 Centre Rech Metallurgique Dispositif pour la coulee continue en charge verticale d'un metal en fusion.
FR2800654B1 (fr) * 1999-11-05 2001-12-14 Lorraine Laminage Lingotiere a section large pour la coulee continue verticale en charge des metaux
FR2825038B1 (fr) * 2001-05-28 2003-08-15 Usinor Lingotiere de coulee continue de brame a largeur reglable, et procede de coulee utilisant la dite lingotiere
EP2075256A2 (de) 2002-01-14 2009-07-01 William Herman Gezielte Liganden
DE102007043386B4 (de) * 2007-09-12 2014-02-13 Gautschi Engineering Gmbh Kokille zum Stranggießen von Metall und Verfahren zum Herstellen einer derartigen Kokille

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO115409B (de) * 1963-06-07 1968-09-30 Aluminum Co Of America
FR2000365A7 (de) * 1968-01-18 1969-09-05 United States Steel Corp
FR2599650B2 (fr) * 1985-07-30 1988-08-26 Pechiney Aluminium Dispositif de coulee en charge de metaux
JP2560935B2 (ja) * 1991-09-24 1996-12-04 日本軽金属株式会社 複数の延出部を有する鋳塊の半連続鋳浩法
FR2690099B1 (fr) * 1992-04-16 1997-05-23 Pechiney Aluminium Procede de coulee en charge permettant d'eviter la fissuration de la rehausse.

Also Published As

Publication number Publication date
DE69703582T2 (de) 2001-06-21
WO1997037791A1 (fr) 1997-10-16
JP2000508240A (ja) 2000-07-04
FR2747061A1 (fr) 1997-10-10
BR9708507A (pt) 1999-08-03
EP0904170A1 (de) 1999-03-31
DE69703582D1 (de) 2000-12-28
KR20000005255A (ko) 2000-01-25
ATE197684T1 (de) 2000-12-15
CA2258111A1 (fr) 1997-10-16
US6135197A (en) 2000-10-24
ES2152089T3 (es) 2001-01-16
FR2747061B1 (fr) 1998-04-30
AU2513297A (en) 1997-10-29

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