EP0278202B1 - Installation de coulée continue de billettes fines de métal notamment d'acier - Google Patents

Installation de coulée continue de billettes fines de métal notamment d'acier Download PDF

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Publication number
EP0278202B1
EP0278202B1 EP19870730150 EP87730150A EP0278202B1 EP 0278202 B1 EP0278202 B1 EP 0278202B1 EP 19870730150 EP19870730150 EP 19870730150 EP 87730150 A EP87730150 A EP 87730150A EP 0278202 B1 EP0278202 B1 EP 0278202B1
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EP
European Patent Office
Prior art keywords
casting
rollers
thickness
supply reservoir
roller
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
EP19870730150
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German (de)
English (en)
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EP0278202A3 (en
EP0278202A2 (fr
Inventor
Achim Dipl.-Ing. Kubon
Walter Ulrich Lüning
Wolfgang Prof. Dr.-Ing. Reichelt
Peter Dr .Ing. Voss-Spilker
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0278202A2 publication Critical patent/EP0278202A2/fr
Publication of EP0278202A3 publication Critical patent/EP0278202A3/de
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Publication of EP0278202B1 publication Critical patent/EP0278202B1/fr
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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
    • B22D11/06—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
    • B22D11/0642—Nozzles
    • 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
    • B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels

Definitions

  • the invention relates to a device for the continuous casting of thin strands of metal, in particular steel, less than about 20 mm thick, with a pair of circular cylindrical, synchronously driven in the strand running direction, cooled rollers, the length of which is about the strand width and the roller shell distance in the axis plane corresponds to the strand thickness, with a feed container for the molten metal assigned to the funnel formed by the pair of rollers.
  • Such devices JP 60-21158 A are also known as roller crystallizers.
  • the use of such devices in practice is still pending for steel as a cast metal.
  • the steel-specific properties in particular call for a special technique.
  • the present invention has for its object to solve the sealing problem in those areas of the device within which the cast metal is still liquid or viscous and requires support.
  • the feed container forms a seal on the outer surfaces facing the rollers together with the roller shells and that a below Outlet openings of the feed container formed casting space is sealed at the front end regions of the rollers by means of an end wall provided on the feed container and that the rollers form a running gap in the end regions, each projecting beyond the thickness of the end wall.
  • This solution represents an ideal combination with regard to the sealing of the liquid casting metal against leakage and at the same time against reoxidation of the molten metal.
  • the advantage of the casting chamber formed is that it has the necessary distance to remove heat via the metallic roll shell, ie to form a strand shell, and also has the casting room has the advantage of preventing the roller jacket from being overstressed.
  • Another advantage is the end wall, which seals the casting space laterally between the rollers.
  • a breakdown protection is provided in that one of the two circular cylindrical, synchronously rotationally driven, cooled rolls is provided with an annular surface which seals the casting chamber and moves past the end face of the counter roll. This ring area is also provided for an enlargement of the running gap by thermal expansion.
  • the two circular cylindrical rollers can be adjusted to the respective strand thickness by changing the parallel center distance of the vertical adjustment of the feed container and with an adapted seal.
  • the seal between the feed container and roller shells is located on a nozzle body with outlet openings arranged at intervals within the width of the cast strand.
  • the device for continuous casting of thin strands of metal e.g. made of steel, about 20 mm thick, has a pair of circular cylindrical rollers 1 and 2, which are driven synchronously by means of a rotary drive, not shown, wherein the rotational speed is very precisely matched to the casting speed.
  • the rollers 1 and 2 consist of a metal with high thermal conductivity and have cooling channels 3 for a flowing coolant.
  • the strand thickness "d" is determined by the roller shell spacing.
  • the rollers 1 and 2 form a funnel 5 between them, to which a feed container 6 is assigned.
  • the feed container 6 consists of refractory material, so that the temperature of the molten metal does not drop very quickly due to heat conduction.
  • Such feed containers 6 are also referred to as "hot top".
  • the most important and so far unmanageable problem with the hot-top system is the sealing of the two rollers 1 and 2. Only with the appropriate sealing against leakage of the molten metal 7 and against reoxidation can metal, in particular steel strips with a thickness of approx. 20 mm be loosened without central loosening of the structure and be produced without crushing in the edge area and without segregation, which also have no disturbing surface roughness on the outside.
  • the feed container 6 forms a seal 9 together with the roller shells 10a and 10b on the outer surfaces 8a and 8b of a nozzle body 8 facing the rollers 1 and 2.
  • the outlet openings 11 (11a to 11g - FIG. 2) open into a casting chamber 12.
  • the end regions 1a and 1b of the rolls 1 and 2 are each sealed by means of an end wall 6a provided on the feed container 6 (FIG. 4), to be precise up to approximately 3, in which the two cast strand shells 13a and 13b formed on the roller shells 10a and 10b have grown together, so that the cast strand 13 has solidified in the axis plane 4 while maintaining the most favorable casting speed.
  • the rollers 1 and 2 each form a running gap 14, the length of which largely corresponds to the thickness 15 of the end wall 6a.
  • rollers 1 and 2 can advantageously be provided with fillets 17 at the ends of the cast strand width 16.
  • one of the two circular cylindrical, synchronously rotationally driven, cooled rollers 1 and 2 is provided with an annular surface 18 which seals the casting chamber 12 and moves past the end face 1c of the counter roller 1 and 2.
  • the feed container 6 is held on projections 19 and 20 by means of an electrically, hydraulically or pneumatically actuatable lifting device 21, which is based on a stationary foundation 22 (FIG. 1), that the seal 9 prevents the movement of the rollers 1 and 2 in the arrow directions 23 allowed.
  • a change in the strand thickness i.e. a reduction or enlargement of the distance between the two rollers 1 and 2 in the axis plane 4 takes place in that the two circular cylindrical rollers 1 and 2 to the respective strand thickness "d" by changing the parallel center distance 24, when actuating the lifting device 21 and by adjusting the Seal 9 is made.
  • the roller diameter D is selected according to the limits specified in claim 4 (D1 and D2) (Fig. 6).
  • the casting speed Vg, half the strand thickness "s", the solidification coefficient "k” for steel and the resulting angle alpha based on the solidification path AB (section b) are used as a basis.
  • a smallest roller diameter is determined using the formula D2, in which the thickness DA of the nozzle body 8 is based, in order to make it sufficiently stable.
  • the height of the section of the circle is labeled "x”.
  • DA is the lower edge of the nozzle body 8.
  • the end of the sump is labeled C.
  • a nozzle body 8 is provided (Fig. 5), which in Has spaced outlet openings 11a to 11f. Controlled crystallization (shell formation) with start at 25 and end or solidification at C is possible through the filled casting chamber 12. It is completed at the latest after passing through the narrowest cross-section (axis level 4).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Claims (5)

  1. Dispositif pour la coulée continue de barres minces en métal, en particulier en acier, d'une épaisseur inférieure à environ 20 mm, comportant une paire de cylindres refroidis (1,2), cylindriques circulaires et entraînés en rotation de façon synchrone dans le sens de déplacement de la barre, dont la longueur correspond à peu près à la largeur de la barre et dont la distance des enveloppes, dans le plan axial, correspond à l'épaisseur de la barre, et comportant un récipient d'amenée (6), associé à la trémie formée par la paire de cylindres, pour le bain de fusion métallique (7), caractérisé en ce que le récipient d'amenée (6) sur les surfaces externes (8a,8b) proches des cylindres (1,2) forme une étanchéification (9) conjointement avec les enveloppes (10a,10b) des cylindres, et en ce qu'un espace de coulée (12) formé au-dessous des orifices de sortie (11) du récipient d'amenée (6) sur les zones d'extrémité frontales (1a,1b) des cylindres (1,2) est étanchéifié par, à chaque fois, une paroi frontale (6a) prévue sur le récipient d'amenée (6), et en ce que les cylindres (1,2), dans les zones d'extrémité (1a,1b), forment une fente de coulée (14) dépassant la largeur de barre, à chaque fois, de l'épaisseur (15) de la paroi frontale (6a).
  2. Dispositif selon la revendication 1,
    caractérisé en ce qu'un des deux cylindres refroidis (1,2), cylindriques circulaires et entraînés en rotation de façon synchrone est muni d'une surface annulaire (18) se déplaçant, à chaque fois, sur la face frontale (1c) du contrecylindre (1 ou 2) et étanchéifiant l'espace de coulée (12).
  3. Dispositif selon les revendications 1 et 2,
    caractérisé en ce que les deux cylindres (1,2) sont réglables à l'épaisseur de barre respective (d) en modifiant la distance axiale parallèle (24) du réglage vertical du récipient d'amenée (6) et pour une étanchéification (9) adaptée.
  4. Dispositif selon les revendications 1 à 3,
    caractérisé en ce que le diamètre (D) des cylindres peut être choisi entre les valeurs D1 et D2 :
    Figure imgb0004
     où :
    Vg =   vitesse de coulée en m/mn
    s =   1/2 épaisseur de barre = d/2 en mm
    k =   coefficient de solidification pour l'acier
    α =   angle entre le plan axial (4) et le bord inférieur de la trémie (5)
    DA =   largeur de l'écartement des cylindres au début de la solidification en mm.
  5. Dispositif selon une ou plusieurs des revendications 1 à 4,
    caractérisé en ce que l'étanchéification (9) entre le récipient d'amenée (6) et les enveloppes (10a,10b) des cylindres se trouve sur un corps de buse (8) avec des orifices de sortie (11) agencés, de façon écartée, à l'intérieur de la largeur de la barre de coulée (16).
EP19870730150 1987-02-10 1987-11-17 Installation de coulée continue de billettes fines de métal notamment d'acier Expired - Lifetime EP0278202B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873703997 DE3703997A1 (de) 1987-02-10 1987-02-10 Vorrichtung zum stranggiessen von duennen straengen aus metall, insbesondere aus stahl
DE3703997 1987-02-10

Publications (3)

Publication Number Publication Date
EP0278202A2 EP0278202A2 (fr) 1988-08-17
EP0278202A3 EP0278202A3 (en) 1988-12-28
EP0278202B1 true EP0278202B1 (fr) 1991-12-27

Family

ID=6320614

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870730150 Expired - Lifetime EP0278202B1 (fr) 1987-02-10 1987-11-17 Installation de coulée continue de billettes fines de métal notamment d'acier

Country Status (3)

Country Link
EP (1) EP0278202B1 (fr)
JP (1) JP2843983B2 (fr)
DE (1) DE3703997A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110000350A (zh) * 2019-05-21 2019-07-12 一重集团大连工程技术有限公司 一种铸轧结晶辊

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9003699D0 (en) * 1990-02-19 1990-04-18 Davy Mckee Poole Roll casting machine
AUPO926197A0 (en) * 1997-09-17 1997-10-09 Bhp Steel (Jla) Pty Limited Casting steel strip

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3430683A (en) * 1967-01-12 1969-03-04 American Metal Climax Inc Feed tip for continuous strip casting machine
JPS5577962A (en) * 1978-12-11 1980-06-12 Mitsubishi Heavy Ind Ltd Continuous casting method of steel
JPS5777962A (en) * 1980-10-31 1982-05-15 Kao Corp Analyzing method for property of concrete, mortar or alc board
JPS58103944A (ja) * 1981-12-14 1983-06-21 Mitsubishi Heavy Ind Ltd 連続鋳造装置
JPS59153048U (ja) * 1983-03-30 1984-10-13 日立造船株式会社 ツインモ−ルドロ−ル連続鋳造設備における鋳型
JPS6021170A (ja) * 1983-07-15 1985-02-02 Nisshin Steel Co Ltd 連続鋳造用ノズル
JPS6064753A (ja) * 1983-09-19 1985-04-13 Hitachi Ltd 双ロ−ル式鋳造機の鋳造方法及びその装置
DE3337583C1 (de) * 1983-10-15 1984-12-06 Fried. Krupp Gmbh, 4300 Essen Vorrichtung zum Bandgiessen von Stahl in einer Stranggiesskokille mit mitlaufenden Kokillenwaenden
JPS61279343A (ja) * 1985-06-06 1986-12-10 Hitachi Zosen Corp 薄板連続鋳造設備におけるツインロ−ル型モ−ルド
JPS61289953A (ja) * 1985-06-14 1986-12-19 Mitsubishi Heavy Ind Ltd 薄板連鋳機
EP0237478B1 (fr) * 1986-03-10 1989-05-24 Larex Ag Moyen d'étanchéité d'une busette de coulée dans l'espace de coulée d'une machine continue à bande mouvante

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110000350A (zh) * 2019-05-21 2019-07-12 一重集团大连工程技术有限公司 一种铸轧结晶辊

Also Published As

Publication number Publication date
JPS63199052A (ja) 1988-08-17
EP0278202A3 (en) 1988-12-28
EP0278202A2 (fr) 1988-08-17
DE3703997A1 (de) 1988-08-18
DE3703997C2 (fr) 1989-08-24
JP2843983B2 (ja) 1999-01-06

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