EP0145811B1 - Procédé et appareil pour la coulée continue - Google Patents

Procédé et appareil pour la coulée continue Download PDF

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Publication number
EP0145811B1
EP0145811B1 EP19830112849 EP83112849A EP0145811B1 EP 0145811 B1 EP0145811 B1 EP 0145811B1 EP 19830112849 EP19830112849 EP 19830112849 EP 83112849 A EP83112849 A EP 83112849A EP 0145811 B1 EP0145811 B1 EP 0145811B1
Authority
EP
European Patent Office
Prior art keywords
moulding cavity
side dams
along
zone
moving
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
EP19830112849
Other languages
German (de)
English (en)
Other versions
EP0145811A1 (fr
Inventor
Yvon L. Vanelderen
Christian L. G. Raskin
René E. J. Mortier
John M. A. Dompas
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.)
Hazelett Strip Casting Corp
Original Assignee
Hazelett Strip Casting Corp
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 Hazelett Strip Casting Corp filed Critical Hazelett Strip Casting Corp
Priority to DE1983112849 priority Critical patent/DE145811T1/de
Priority to DE8383112849T priority patent/DE3380661D1/de
Priority to EP19830112849 priority patent/EP0145811B1/fr
Publication of EP0145811A1 publication Critical patent/EP0145811A1/fr
Application granted granted Critical
Publication of EP0145811B1 publication Critical patent/EP0145811B1/fr
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
    • 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
    • B22D11/068—Accessories therefor for cooling the cast product during its passage through the mould surfaces
    • B22D11/0691—Accessories therefor for cooling the cast product during its passage through the mould surfaces by cooling the side dams

Definitions

  • the present invention relates to process and apparatus for continuous casting of molten metal in a twin-belt casting machine according to the preambles of the independent claims 1, 8 and 13.
  • the moulding cavity is formed by means of moving walls, the lower wall being formed by the upper run of a lower endless flexible belt, the upper wall being formed by the lower run of an upper endless flexible belt, and the side walls being formed by a pair of spaced endless side dams, that move with the belts along the opposite sides of the moulding cavity from the inlet (or entrance) to the outlet (or exit) thereof and that are guided by guide means during their movement along the moulding cavity.
  • the lower wall and the upper wall are cooled by contact with a cooling liquid on their respective reverse surfaces. That is, the cooling' liquid is applied to the lower surface of the upper run of the lower belt, and the cooling liquid is also applied to the upper surface of the lower run of the upper belt.
  • Molten metal is fed in at the entrance of the moulding cavity, and a cast product is delivered at the outlet of the moulding cavity.
  • the side dams pass during their movement along the moulding cavity successively through a first zone, in which they face molten metal and through a second zone located downstream from the first zone in which they face solidified metal.
  • LU-A-80 647 describes an apparatus for continuous casting of liquid metal comprising two fixed sidewalls and a cooling means for circulating a cooling liquid through the interior of the hollow side walls.
  • the aim of the present invention is to provide a process and apparatus that avoid the drawbacks of the above-known process and apparatus.
  • a cooling fluid is circulated in at least a part of the fixed guides and this cooling fluid is sprayed through the fixed guides directly onto the moving side dams in at least a part of the aforesaid second zone in which the moving side dams face solidified metal.
  • the present invention relates to a process for continuous casting according to which a moulding cavity is formed by means of moving walls, the lower wall being formed by the upper run of a lower endless belt, the upper wall being formed by the lower run of an upper endless belt and the side walls being formed by a pair of endless side dams, that move with the belts along the moulding cavity from the inlet to the outlet thereof; the lower wall and the upper wall are cooled by contact with a cooling liquid, and molten metal is fed at the inlet of the moulding cavity and a cast product is delivered at the outlet of the moulding cavity, the side dams thus passing during their movement along the moulding cavity successively through a first zone, in which they face molten metal and through a second zone which they face solidified metal.
  • This process is further characterized in that cooling fluid is sprayed directly on the side dams in at least a part of the aforesaid second zone.
  • the use of fixed guides for the moving side dams is optional.
  • a continuous casting apparatus includes a moulding cavity formed by means of moving walls, the lower wall being formed by the upper run of a lower endless belt, the upper wall being formed by the lower run of an upper endless belt and the side walls being formed by a pair of endless side dams that are adapted to move with the belts along the moulding cavity from the inlet to the outlet thereof, fixed guides to guide the side dams during their movement along the moulding cavity, means for applying a cooling liquid on the reverse surfaces of the lower and upper walls, and a first zone, in which the side dams face liquid metal when the apparatus is running, and a second zone, in which the side dams face solidified metal when the apparatus is running and wherein the fixed guides are adapted to be cooled over at least a part of their length by circulation of a cooling fluid;
  • this apparatus is further characterized by means incorporated in the fixed guides for spraying cooling fluid on the side dams in at least a part of the aforesaid second zone.
  • the invention is further directed to a continuous casting apparatus for casting molten metal wherein a moulding cavity is formed between two moving belts with respectively form the upper and lower walls of the moulding cavity, and the side walls are formed by a pair of endless side dams that move with the belts along the moulding cavity from the inlet to the outlet thereof, the upper and lower walls being cooled by liquid coolant, and molten metal being introduced into the inlet and a product is discharged from the outlet which is solidified at least on the outside thereof, the side dams thus passing during their movement along the moulding cavity successively through a first zone in which they face molten metal and a second zone in which they face solidified metal, said apparatus comprising guide means extending along adjacent to the outside of the respective moving side dam for guiding the moving side dam along the moulding cavity; this apparatus is further characterized in that the guide means defines a channel adjacent to the outside surface of the moving side dam along at least a portion of said second zone and in that means are provided for applying liquid coolant directly onto the moving side dams along said
  • the apparatus shown in Figs. 1 to 3 comprises an upper moving endless belt 1 and a lower moving endless belt 2.
  • the upper belt 1 passes around rolls 3 and 4, and the lower belt 2 passes around rolls 5 and 6.
  • Rolls 3 and 5 are driven in the direction indicated by arrows 10 and 11 and consequently drive belts 1 and 2 in the direction of arrows 9 and rolls 4 and 6 in the direction of arrows 7 and 8.
  • Two moving endless side dams 12 and 13 are located partly between the lower run of the upper belt 1 and the upper run of the lower belt 2.
  • the side dams 12 and 13 delimit with upper belt 1 and with the lower belt 2 a moulding cavity 14 between an inlet or entrance 15 and an outlet or exit 16. The movement of belts 1 and 2 causes the side dams 12 and 13 to move.
  • the side dams 12 and 13 move thus with belts 1 and 2 in the direction of arrows 9 from inlet 15 to outlet 16 of the moulding cavity 14.
  • the side dams 12 and 13 are formed by a metal strap 17 and by a large number of metal blocks 18 strung on this strap.
  • the side dams 12 and 13 are guided by fixed guides 19 and 20 in order to avoid their sidewards movement toward the outside which would make the profile of the cast product irregular.
  • the construction of fixed guides 19 and 20 will be described and more detailed further on.
  • the casting apparatus is supplied with molten metal by conventional metal feeding apparatus (not shown) feeding the moulding cavity 14 with molten metal.
  • This feeding apparatus is located at inlet 15 of the moulding zone between side dams 12 and 13.
  • the metal is cooled in the moulding cavity 14 on the one hand by spraying a cooling liquid on the reverse surfaces of belts 1 and 2, respectively, as schematically illustrated at 21 and 22, as detailed in the aforesaid U.S. Patent No. 3,036,348, and on the other hand by spraying a cooling liquid on side dams 12 and 13, as will be described further on.
  • the cast product issues in the shape of a strip or bar, that is either entirely solidified or is composed of a solidified metal sheath or skin enclosing a liquid metal core.
  • This strip or bar is determined by the distance between belts 1 and 2, and the width by the distance between the side dams 12 and 13.
  • Second zone a first zone
  • zone A a second zone
  • zone B a second zone
  • the length of the first zone A depends on a number of factors such as the nature and temperature of the cast metal, the section that is cast, the inclination of the moulding cavity the nature of the walls of the moulding cavity, the intensity of the applied cooling, the casting speed, etc.
  • This length of zone A can be computed for each case in particular. Normally the length of zone A is in the range from approximately 3/1 Oths to approximately 1/2 of the overall length of the moulding cavity 14.
  • the casting operation is carried out under such conditions that this length of zone A amounts to about three to four tenths of the length of the moulding cavity, which means that the second zone B normally extends over at least the second half of the moulding cavity 14, and preferably extends over approximately 6/10ths to approximately 7/10ths of the total length of the moulding cavity.
  • Rolls 5 and 6 as well as the cooling system 22 of the lower belt 2 are mounted on a lower frame 23, and rolls 3 and 4 and the cooling system 21 of the upper belt 1, on the upper frame 24.
  • the lower frame 23 and the upper frame 24 are spaced by a certain number of spacers 25, passing through two tightening or adjusting elements 26 and 27 and serving for keeping these elements in position.
  • Rods 28, which enable the adjustment of the position of the fixed guides 19 and 20, pass through the tightening elements 26 and 27.
  • spacers 25, tightening elements 26 and 27, and regulating rods 28 are not shown in Fig. 1.
  • FIG. 1 Figures 4 to 6 give a detailed view of the construction of the guide 19.
  • This guide 19 is essentially composed of the following elements: a U-section 29; a flat section 30 welded at 31 to the legs of the U-section 29; a rectangular section 32 fixed by screws 33 (Fig.
  • the openings 43 are each directed at an actue angle C towards the downstream moving direction 9 of the side dams 12 and 13, preferably at an angle C of approximately 20° to approximately 50°.
  • a cooling fluid preferably such as water
  • a cooling fluid is introduced through the supply opening 42 in cavity 40, from where it sprays out through the openings or orifices 43 in the direction of side dam 12, thereby being directly applied onto the moving side dam 12 along at least a portion of the second zone B of the moulding cavity 14.
  • the fixed guide 19 as shown in Fig. 6 thus comprises a first upstream part, that is not adapted to spray cooling fluid on side dam 12 and that extends over at least zone A, and a second downstream part, that is adapted to spray cooling fluid on side dam 12 and that extends over at least a part of zone B.
  • first upstream part that is not adapted to spray cooling fluid on side dam 12 and that extends over at least zone A
  • second downstream part that is adapted to spray cooling fluid on side dam 12 and that extends over at least a part of zone B.
  • both parts are shown as having almost the same length.
  • the other guide 20 is constructed like the guide 19, except it is a mirror image of the guide 19.
  • the U-section 34 of the guide 19 defines a channel, as seen in Fig. 3, adjacent to the outside surface of the side dam 12.
  • the corresponding U-section of the other guide 20 defines a channel adjacent to the outside surface of the other side dam 13.
  • the spray openings 43 are aimed toward the outside surfaces of the respective side dams 12, 13 along these channels. These channels are open at their downstream ends, as seen in Fig. 6, for allowing the cooling fluid which has been applied to the side dams to escape near the outlet or exit 16 (Fig. 1).
  • the downstream angle C of the multiple spray openings 43 propels the cooling fluid in a downstream direction toward the open end of this channel as shown by the arrow 45 in Fig. 6.

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

Claims (15)

1. Procédé de coulée continue selon lequel une cavité de moulage (14) est formée au moyen de parois mobiles, la paroi inférieure étantformée par le brin supérieur d'une courroie sans fin inférieure (2), la paroi supérieure étant formée par le brin inférieur d'une courroie sans fin supérieure (1), et les parois latérales étant formées par une paire de retenues latérales sans fin (12, 13), qui se déplacent avec les courroies le long de la cavité de moulage (14) depuis son entrée (15) jusqu'à sa sortie (16); la paroi inférieure et la paroi supérieure sont refroidies par contact avec un liquide de refroidissement, et le métal fondu est alimenté à l'entrée (15) de la cavité de moulage (14) et un produit coulé est fourni à la sortie (16) de la cavité de moulage (14), les retenues latérales (12, 13) passant ainsi pendant leur mouvement le long de la cavité de moulage (14) successivement par une première zone (A) dans laquelle elles sont face à du métal fondu, et par une seconde zone (B) dans laquelle elles sont face à du métal solidifié, caractérisé en ce que le fluide de refroidissement est pulvérisé directement sur les retenues latérales (12, 13) dans au moins une partie de la seconde zone susmentionnée (B).
2. Procédé selon la revendication 1, caractérisé en ce que le fluide de refroidissement est pulvérisé à travers des guides fixes (19, 20) destinés aux retenues latérales mobiles (12,13) sur les retenues latérales mobiles après qu'elles ont parcouru entre approximativement le 1/3 et approximativement la 1/2 de la longueur (A+B) de la cavité de moulage (14), et est ensuite pulvérisé sur les retenues latérales mobiles (12, 13) jusqu'à ce que les retenues latérales mobiles atteignent la sortie (16) de la cavité de moulage.
3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le fluide de refroidissement est pulvérisé dans une direction qui, vue à partir de l'entrée (15) de la cavité de moulage (14), forme un angle aigu C avec la direction de déplacement (9) des retenues latérales (12, 13).
4. Procédé selon la revendication 3, caractérisé en ce que l'angle aigu C est situé entre approximativement 20° et approximativement 50°.
5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'on utilise de l'eau en tant que fluide de refroidissement pulvérisé directement sur les retenues latérales mobiles (12, 13).
6. Procédé selon l'une quelconque des revendications 3 à 5 quand elles sont dépendantes de la revendication 2, caractérisé en ce que le fluide de refroidissement est pulvérisé sur la surface extérieure de la retenue latérale mobile (12,13) en des emplacements multiples (43) le long d'un canal (34) défini par chaque guide fixe (19, 20) et adjacent à la surface extérieure de la retenue latérale mobile respective (12 ou 13) le long de la majeure portion de ladite seconde zone B, ledit canal (34) étant ouvert à son extrémité en aval et près de l'ouverture (16) de la cavité de moulage (14), et ledit angle aigu C propulse le fluide de refroidissement le long dudit canal (34) en direction de son extrémité d'aval (45).
7. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le fluide de refroidissement est pulvérisé directement contre la surface extérieure de chaque retenue latérale mobile (12, 13) en des emplacements de pulvérisation multiples (43) espacés le long de la majeure portion de ladite seconde zone (B).
8. Appareil de coulée continue comprenant une cavité de moulage (14) formée au moyen de parois mobiles, la paroi inférieure étant formée par le brin supérieure d'une courroie sans fin inférieure (2), la paroi supérieure étant formée par le brin inférieure d'une courroie sans fin supérieure (1) et les parois latérales étant formées par une paire de retenues latérales sans fin (12, 13) qui sont adaptées à se déplacer avec les courroies (1, 2) le long de la cavité de moulage (14) depuis son entrée (15) jusqu'à sa sortie (16), des guides fixes (19, 20) pour guider les retenues latérales (12, 13) pendant leur mouvement le long de la cavité de moulage (14), des moyens (40, 43) pour appliquer un liquide de refroidissement sur les surfaces inverses des parois supérieure et inférieure, et une première zone (A) dans laquelle les retenues latérales (12, 13) sont face à du métal liquide quand l'appareil fonctionne, et une seconde zone (B) dans laquelle les retenues latérales (12, 13) sont face à du métal solidifié quand l'appareil fonctionne, et dans lequel les guides fixes (19, 20) sont adaptés à être refroidis sur au moins une partie de leur longueur par circulation d'un liquide de refroidissement, caractérisé par des moyens (40, 43) incorporés dans les guides fixes (19, 20) pour pulvériser le fluide de refroidissement sur les retenues latérales (12, 13) dans au moins une partie de la seconde zone susmentionnée (B).
9. Appareil selon la revendication 8, caractérisé en ce que les moyens pour pulvériser le fluide de refroidissement sur les retenues latérales (12, 13) comprennent des ouvertures (43) dans les guides (19, 20).
10. Appareil selon la revendication 8 ou 9, caractérisé en ce que les moyens pour pulvériser le fluide de refroidissement sur les retenues latérales (12,13) s'étendent sur au moins la 1/2 de la longueur A+B de la cavité de moulage (14) le long de sa portion d'aval (B).
11. Appareil selon la revendication 8 ou 9, caractérisé en ce que les moyens (40, 43) pour pulvériser le fluide de refroidissement sur les retenues latérales (12, 13) sont adaptés à pulvériser le liquide de refroidissement dans une direction qui, vue depuis l'entrée (15) de la cavité de moulage (14), forme un angle aigu C avec la direction du déplacement (9) des retenues latérales (12, 13).
12. Appareil selon la revendication 11, caractérisé en ce que l'angle aigu C est compris entre approximativement 20° et approximativement 50°.
13. Appareil de coulée continue pour couler du métal fondu, dans lequel est formée une cavité de moulage (14) entre deux courroies mobiles (1, 2) qui forment respectivement les parois supérieure et inférieure de la cavité de moulage (14), et les parois latérales sont formées par une paire de retenues latérales sans fin (12, 13) qui se déplacent avec les courroies (1, 2) le long de la cavité de moulage (14) depuis son entrée (15) jusqu'à sa sortie (16), les parois supérieure et inférieure étant refroidies par du liquide de refroidissement, et du métal fondu étant introduit à l'entrée (15) et un produit est déchargé à la sortie (16), qui est solidifié au moins sur son côté extérieur, les retenues latérales (12, 13) passant ainsi pendant leur mouvement le long de la cavité de moulage (14) successivement par une première zone (A) dans laquelle elles sont face à du métal fondu et dans une seconde zone (B) dans laquelle elles sont face à du métal solidifié, ledit appareil comprenant des moyens de guidage (19, 20) s'étendant le long et de façon adjacente au côté externe de la retenue latérale (12, 13) mobile respective pour guider la retenue latérale mobile (12, 13) le long de la cavité de moulage (14), caractérisé en ce que les moyens de guidage (19, 20) définissent un canal (34) adjacent à la surface externe de la retenue latérale mobile (12, 13) le long d'au moins une portion de ladite seconde zone (B) et en ce que des moyens (40, 43) sont prévus pour appliquer du liquide de refroidissement directement sur les retenues latérales mobiles (12, 13) le long dudit canal (34).
14. Appareil de coulée continue selon la revendication 13, caractérisé en ce que le lesdits moyens (40, 43) pour appliquer du liquide de refroidissement directement sur les retenues latérales mobiles (12, 13) comprennent une pluralité d'ouvertures de pulvérisation (43) espacées le long dudit canal (34) et dirigées vers la surface extérieure de la retenue latérale mobile (12 ou 13) le long du canal respectif (34) pour pulvériser le liquide refroidissement directement sur la surface extérieure de la retenue latérale mobile (12 ou 13).
15. Appareil de coulée continue selon la revendication 14, caractérisé en ce que ledit canal (34) est ouvert à son extrémité aval (45), et lesdites ouvertures de pulvérisation (43) sont dirigées dans la direction de l'aval en formant un angle aigu C en direction de la surface extérieure de la retenue latérale mobile (12, 13) pour propulser le réfrigérant appliqué en direction de l'aval vers l'extrémité ouverte dudit canal (34).
EP19830112849 1983-12-20 1983-12-20 Procédé et appareil pour la coulée continue Expired EP0145811B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE1983112849 DE145811T1 (de) 1983-12-20 1983-12-20 Verfahren und vorrichtung zum stranggiessen.
DE8383112849T DE3380661D1 (en) 1983-12-20 1983-12-20 Process and apparatus for continuous casting
EP19830112849 EP0145811B1 (fr) 1983-12-20 1983-12-20 Procédé et appareil pour la coulée continue

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19830112849 EP0145811B1 (fr) 1983-12-20 1983-12-20 Procédé et appareil pour la coulée continue

Publications (2)

Publication Number Publication Date
EP0145811A1 EP0145811A1 (fr) 1985-06-26
EP0145811B1 true EP0145811B1 (fr) 1989-10-04

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EP19830112849 Expired EP0145811B1 (fr) 1983-12-20 1983-12-20 Procédé et appareil pour la coulée continue

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19511493A1 (de) * 1995-03-29 1996-10-02 Kubon Achim Wolfgang Dipl Ing Verfahren und Vorrichtung zum Gießen von endabmessungsnahen Bändern aus Metallen, Legierungen und anderen Materialien

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2366531B (en) 2000-09-11 2004-08-11 Daido Metal Co Method and apparatus for continuous casting of aluminum bearing alloy
DE102011078654A1 (de) 2011-07-05 2013-01-10 Sms Siemag Ag Vorrichtung zur Seitenabdichtung einer Gießanlage

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL237185A (fr) * 1958-03-17
LU80647A1 (fr) * 1978-12-13 1979-11-07 Metallurgie Hoboken Machine de coulee continue de metaux liquides

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19511493A1 (de) * 1995-03-29 1996-10-02 Kubon Achim Wolfgang Dipl Ing Verfahren und Vorrichtung zum Gießen von endabmessungsnahen Bändern aus Metallen, Legierungen und anderen Materialien
DE19511493C2 (de) * 1995-03-29 1998-05-14 Achim Wolfgang Dipl Ing Kubon Verfahren und Vorrichtung zum Gießen von endabmessungsnahen Bändern aus Metallen, Legierungen und anderen Materialien

Also Published As

Publication number Publication date
DE145811T1 (de) 1986-05-22
DE3380661D1 (en) 1989-11-09
EP0145811A1 (fr) 1985-06-26

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