EP1140389B1 - Coquille de coulee en continue - Google Patents

Coquille de coulee en continue Download PDF

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Publication number
EP1140389B1
EP1140389B1 EP99950385A EP99950385A EP1140389B1 EP 1140389 B1 EP1140389 B1 EP 1140389B1 EP 99950385 A EP99950385 A EP 99950385A EP 99950385 A EP99950385 A EP 99950385A EP 1140389 B1 EP1140389 B1 EP 1140389B1
Authority
EP
European Patent Office
Prior art keywords
side walls
wide side
continuous casting
wall
side wall
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
EP99950385A
Other languages
German (de)
English (en)
Other versions
EP1140389A1 (fr
Inventor
Andreas Flick
Gernot Lettmayr
Helmut Eidinger
Franz Wimmer
Werner Jahn
Josef Watzinger
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.)
Primetals Technologies Austria GmbH
Original Assignee
Voest Alpine Industrienlagenbau GmbH
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 Voest Alpine Industrienlagenbau GmbH filed Critical Voest Alpine Industrienlagenbau GmbH
Publication of EP1140389A1 publication Critical patent/EP1140389A1/fr
Application granted granted Critical
Publication of EP1140389B1 publication Critical patent/EP1140389B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/0408—Moulds for casting thin slabs

Definitions

  • the invention relates to a continuous casting mold for the continuous casting of a Steel strand, preferably for casting thin slabs with a thickness of less than 100 mm opposite broad side walls and with between the broad side walls clampable and displaceable along the broad side walls transversely to the casting direction arranged, opposite, wedge-shaped in the casting direction becoming narrow side walls, the wide side walls having a funnel-shaped Have pouring area that extends in the casting direction to the mold end and the Distance of the broad side walls from one another in the direction of the narrow side walls as well is continuously reduced in the casting direction at least over partial areas of its extent and the broad side walls are designed to converge.
  • a continuous casting mold of the generic type is already known from DE-C 35 01 422 known.
  • Their broad side walls are towards the narrow side walls and in Casting direction converged.
  • the broad side walls point in the adjustment area of the narrow side walls on flat contact surfaces, which with the side walls of the Interact narrow side walls. If a format adjustment in the mold is to be made, this is usually a shift of the Narrow side walls in the sense of changing the width of the steel strand to be cast.
  • the strand thickness and thus the distance between the broad side walls should be here be kept constant. Keeping the distance between the wide side walls constant is at However, a format adjustment of the known continuous casting mold is only possible if the Narrow side walls can be moved both horizontally and vertically. The formation of the broad side walls in the adjustment range of the narrow side walls with one flat surface causes its skewed position in relation to the longitudinal axis of the mold. Due to these geometric restrictions, it is no longer possible to use the outlet cross section to be designed so that for each strand format to be cast, the strand thickness is above the entire strand width is constant.
  • a continuous casting mold is also known from EP 0 658 387 A1, the broad side walls of which towards the narrow side walls and in the casting direction in some areas are formed converging.
  • the broad side walls point in the adjustment range Narrow side walls have flat surface contours that match the side surfaces of the Narrow side walls work together and their distance from each other towards the Narrow side walls decrease linearly and is constant in the casting direction.
  • This Embodiment requires a shift in the narrow side walls in the sense of a Broadside change of the steel strand to be cast also automatically Thickness adjustment in a ratio predetermined by the geometry. So that will however, the spectrum of those to be cast with such a continuous casting mold Strand formats undesirably restricted.
  • the object of the invention is therefore to avoid these disadvantages described above and to propose a continuous caster with a funnel-shaped pouring area, the one Format adjustment enables the strand width of the strand to be cast without Reaction set on the strand thickness and the strand thickness of the to be cast Strands can be kept constant over the entire width of the strand.
  • This object is achieved with a generic continuous casting mold in that the distance of the Broad side walls of each other at the end of the mold over the entire width of the Broad sidewalls is constant and at least one of the broad sidewalls with respect to the opposite broad side wall can be moved and tilted on a mold frame arranged and connected to an adjusting device.
  • the broad side walls are plane-parallel in the adjustment area of the narrow side walls face each other, result from the converging course of the broad side walls in the adjustment area there are fewer curvatures in the funnel-shaped pouring area and thus problem-free strand shell formation.
  • the tilting of the narrow side walls is between the Wide side walls avoided and the necessary tilt angle for the wide side wall halved if each of the broad side walls can be moved on a mold frame and is arranged tiltable and connected to an adjusting device.
  • An expedient embodiment of the continuous casting mold is that each other opposite broad side walls with a both broad side walls Adjustment device are connected.
  • a special constructive solution is that the tiltable broad side wall is articulated to the adjustment device.
  • Optimal conditions for the continuous shell formation in the continuous casting mold are obtained if, based on a horizontal plane receiving the casting level under constant casting conditions, the inclination ⁇ 1 of the broad side wall in the funnel-shaped pouring area is 1 ° to 5 ° and the inclination ⁇ 2 of the broad side wall in the adjustment range of the narrow side wall between Is 0.1 ° and 0.3 °.
  • a simple structure of the continuous casting mold according to the invention is achieved in that each broad side wall is releasably attached to a support wall, and the adjusting device with at least one of the sliding together with the broad side wall and tiltable retaining walls is connected.
  • the coolant channels for the mold cooling are at the contact level between the broad side wall and the support wall in the Broad side wall or the support wall incorporated in the form of coolant slots.
  • the broad side wall and the Support wall arranged a support wall, the broad side wall on the support wall and the support wall is releasably attached to the support wall.
  • the coolant channels for the Chill cooling are in at the contact level between the broad side wall and the carrier wall the broad side wall or incorporated into the support wall in the form of coolant slots.
  • the Geometry of the coolant channels in the funnel-shaped pouring area of the broad side walls and the geometry of the coolant channels in the adjustment area of the narrow side walls is different.
  • the geometry of the coolant channels on the one hand is the distance between the Coolant channels from each other, on the other hand, the clear width (cross-sectional area) of the Coolant channels and thus the coolant flow rate or To understand a combination of both factors. Through both measures specific heat flow density of the broad side walls varies.
  • this is achieved in that groups of neighboring Coolant channels with individually controllable coolant stations in line are connected, the funnel-shaped pouring area and the adjustment areas of the Narrow side walls of each broad side wall at least one Coolant supply station is assigned.
  • the inner walls of the wide side walls forming the mold cavity in Casting direction of different materials are formed, which in the area of Gittyador used material has a lower thermal conductivity than that for the section of the broad side walls used in the casting direction.
  • the broad side walls exist in the area of the casting mirror, where particularly high temperatures occur and solidification is not immediately desired from non-ferrous metals, refractory fabrics or various combinations thereof.
  • the equipment of the adjustment devices for the broad side walls and the Narrow side walls with electromechanical or hydraulic drives are special inexpensive and reliable.
  • FIG. 1 and 2 are continuous casting molds according to the invention for producing a Steel strand shown schematically in two basic embodiments, wherein Identical components are provided with the same reference symbols.
  • Two broad side walls 1, 2 and two narrow side walls 3, 4 of a continuous casting mold form a mold cavity 5, introduced into the molten steel via a pouring tube, not shown, and from the one partially solidified steel strand is conveyed out of the continuous casting mold in the casting direction.
  • the Broad side walls 1, 2 and the narrow side walls 3, 4 are usually made of copper or a copper alloy or another very good heat-conducting material.
  • the broad side walls 1, 2 are supported and screwed to support walls 7, 8.
  • the narrow side walls 3, 4 are supported on supporting walls, not shown, and screwed.
  • FIG Broad side wall 2 is designed as a fixed side, i.e. together with the support wall 8 a clearly defined position in relation to the mold structure 11.
  • the of the Broad side wall 1 and the associated support wall 7 formed loss side is in Chill mold structure 11 is slidably supported on guides 17 transversely to the casting direction 6 and with the adjusting devices 12, 13 against the narrow side walls 3, 4 and this can be pressed together against the firmly positioned broad side wall 2, this by moving in the direction of the guides 17 and tilting around the lower or upper inner edge 18, 18a of the broad side wall 1 takes place.
  • Guides 17 slidably supported transversely to the casting direction 6 and with the Adjustment devices 12, 13 can be pressed against the narrow side walls 3, 4 on both sides, this by moving in the direction of the guides 17 and tilting around the lower or upper inner edge 18, 18a, 19, 19a of the broad side walls 1, 2 takes place.
  • FIGS. 3 and 4 show a horizontal section through the continuous casting molds according to FIG Figures 1 and 2, which is created in the area of the mold level, the geometric Conditions in this area of the continuous casting mold and their changes in a Format adjustment.
  • this is the surface of the continuous casting mold filled liquid melt called, this casting level at constant Casting conditions are always kept at approximately the same level in the continuous casting mold becomes.
  • FIGS. 3 and 4 Inner edges of the broad side walls 1, 2 shown.
  • On the centrally created funnel-shaped pouring area 20 closes an adjustment area on both sides of the Narrow side walls 21, 22, within which the narrow side walls 3, 4 are displaceable are positioned.
  • the narrow side wall 4 is for a first strand format with continuous lines shown and the broad side walls 1, 2 are also with a continuous line thereon customized.
  • the narrow side wall 3 is in the left half of the picture for a smaller one Strand format shown with dashed lines.
  • the shifting movement of the Narrow side wall 3 is indicated by arrow 23, which is the narrow side adjustment devices 9, 10 symbolized in FIG. 1.
  • the broad side wall 1 is as Loss side formed and in the direction of arrow 24, which the adjusting devices 12, 13th 1 symbolized, tilted to the fixed side formed by the broad side wall 2 and shown with dashed lines. The tilting movement takes place around the lower inner edge 18 of the broad side wall 1.
  • the lower inner edge 18 which the Exit cross section defined from the continuous casting mold in a section, changed their position by the format adjustment is not, so unchanged from desired Strand formats the strand thickness always remains constant in the outlet cross-section. 5 is with dashed lines which are caused by the tilting movement around the lower inner edge 18 effected change in position of the broad side wall 1 shown.
  • Fig. 4 the conditions for the case that both broad side walls 1, 2 loose sides form from two loss sides, as already shown in FIG. 2, in an analogous manner illustrated.
  • narrow side wall 3 is illustrated to a synchronous tilting of the two broad side walls 1, 2 in the left half section with position shown by dashed lines.
  • the entire continuous casting mold remains in one to the central pouring axis 25 symmetrical position. Modify the narrow side walls 3, 4 their vertical orientation is not.
  • Fig. 6 are dashed lines through the Tilting movement around the lower inner edges 18 caused changes in position of the shown two broad side walls 1,2.
  • the flat inner wall parts of the broad side walls 1, 2, which have different inclinations from one another, are aligned with arcuate transitions R 1 , R 2 .
  • the inclination ⁇ 1 of the broad side walls 1,2 in the funnel-shaped pouring area 20 is in the range from 1 to 5 ° and the inclination ⁇ 2 of the broad side walls in the adjustment range of the narrow side walls 21,22 is in the range from 0.1 ° to 0.3 °. This creates the best conditions for the formation of strand shells.
  • FIGS. 7a and 7b The structural structure of the broad side of a continuous casting mold is in FIGS. 7a and 7b shown schematically.
  • Each broad side wall 1, 2 is either directly on a support wall 7, 8 releasably attached by screw connections (Fig. 7b), or with interposition a support wall 27 thereon, and both walls together on a support wall 7, 8 releasably attached (Fig. 7a).
  • Coolant channels 26 are in each broad side wall 1, 2 groove-shaped, parallel to each other and vertically following the casting direction. she can, however, also in the support wall 7, 8 or Carrier wall 27 may be incorporated, as previously described for the broad side wall. This Variant is shown in FIGS. 7a and 7b with dashed lines.
  • the geometry of the coolant channels gives way to sections of the cooling effect 26 in their cross section and / or in their distance from one another in a funnel-shaped Pouring area from the adjustment range of the narrow side walls.
  • the same effect is accessible if the coolant channels 26 in groups with coolant supply stations 28 are connected, whereby the flow rate in the Coolant channels 26 becomes variable.
  • the broad side walls 1, 2 are in the funnel-shaped pouring area 20 in the casting direction 6 parabolic (Fig. 8).
  • the narrow side walls 3, 4 have, as in FIG. 9 shown, a surface contour, in particular parabolic on the pouring side is formed and in addition in a region 29 which is below the Casting mirror extends to the mold outlet, edge clearances 30 on both sides are arranged. These edge clearances are already in detail in AT-B 404 235 described.

Claims (16)

  1. Lingotière de coulée continue pour la coulée continue d'une barre d'acier, de préférence pour la coulée de brames minces de moins de 100 mm d'épaisseur, avec des parois latérales larges (1, 2) opposées l'une à l'autre et avec des parois latérales étroites (3, 4) opposées l'une à l'autre, disposées de façon à pouvoir être calées entre les parois latérales larges et déplacées transversalement par rapport au sens de la coulée (6) le long des parois latérales larges et se rétrécissant en forme de coin dans le sens de la coulée, dans laquelle les parois latérales larges (1, 2) présentent une zone d'alimentation (20) en forme d'entonnoir, qui s'étend dans le sens de la coulée (6) jusqu'à l'extrémité de la lingotière, et la distance des parois latérales larges (1, 2) l'une de l'autre dans le sens dirigé vers les parois latérales étroites (3, 4) ainsi que dans le sens de la coulée (6) se réduit en continu au moins sur des zones partielles de leur extension et les parois latérales larges (1, 2) sont de forme convergente dans le sens dirigé vers les parois latérales étroites (3, 4) dans la région de déplacement des parois latérales étroites (21, 22), caractérisée en ce que la distance des parois latérales larges (1, 2) l'une de l'autre à l'extrémité de la lingotière est constante sur toute la largeur des parois latérales larges et en ce qu'au moins une des parois latérales larges (1, 2) est disposée de façon à pouvoir être déplacée et inclinée sur un support de lingotière (11) par rapport à la paroi latérale large opposée et est assemblée à un dispositif de déplacement (12, 13).
  2. Lingotière de coulée continue suivant la revendication 1, caractérisée en ce que chacune des parois latérales larges (1, 2) est disposée de façon à pouvoir être déplacée et inclinée sur un support de lingotière (11) et est assemblée à un dispositif de déplacement (12, 13).
  3. Lingotière de coulée continue suivant l'une ou l'autre des revendications 1 ou 2, caractérisée en ce que les parois latérales larges (1, 2) sont assemblées à un dispositif de déplacement (12, 13) comprenant les deux parois latérales larges.
  4. Lingotière de coulée continue suivant l'une quelconque des revendications 1 à 3, caractérisée en ce que la paroi latérale large inclinable (1, 2) est assemblée de façon articulée au dispositif de déplacement (12, 13).
  5. Lingotière de coulée continue suivant l'une quelconque des revendications 1 à 4, caractérisée en ce que, par rapport à un plan horizontal contenant le ménisque de coulée pour des conditions de coulée constantes, l'inclinaison α1 de la paroi latérale large dans la zone d'alimentation en forme d'entonnoir (20) vaut de 1° à 5° et l'inclinaison α2 de la paroi latérale large dans la région de déplacement de la paroi latérale étroite (21, 22) vaut de 0,1° à 0,3°.
  6. Lingotière de coulée continue suivant l'une quelconque des revendications 1 à 5, caractérisée en ce que les parois latérales étroites (3, 4) sont disposées entre les parois latérales larges (1, 2) dans une position divergente l'une de l'autre dans le sens de la coulée.
  7. Lingotière de coulée continue suivant l'une quelconque des revendications 1 à 6, caractérisée en ce que chaque paroi latérale large (1, 2) est fixée de façon démontable à une paroi de soutien (7, 8) et en ce que le dispositif de déplacement (12, 13) est assemblé à au moins une des parois de soutien (7, 8) déplaçables et inclinables en commun avec la paroi latérale large.
  8. Lingotière de coulée continue suivant la revendication 7, caractérisée en ce que des canaux d'agent de refroidissement (26) pour le refroidissement de la lingotière sont usinés dans la paroi latérale large (1, 2) ou dans la paroi de soutien (7, 8) au plan de contact entre la paroi latérale large (1, 2) et la paroi de soutien (7, 8) sous la forme de fentes d'agent de refroidissement.
  9. Lingotière de coulée continue suivant la revendication 7, caractérisée en ce qu'une paroi de support (27) est disposée entre la paroi latérale large (1, 2) et la paroi de soutien (7, 8), la paroi latérale large (1, 2) étant fixée de façon démontable à la paroi de support (27) et la paroi de support (27) l'étant à la paroi de soutien (7, 8).
  10. Lingotière de coulée continue suivant la revendication 9, caractérisée en ce que des canaux d'agent de refroidissement (26) pour le refroidissement de la lingotière sont usinés dans la paroi latérale large (1, 2) ou dans la paroi de support (27) au plan de contact entre la paroi latérale large (1, 2) et la paroi de support (27) sous la forme de fentes d'agent de refroidissement.
  11. Lingotière de coulée continue suivant l'une quelconque des revendications 7 à 10, caractérisée en ce que la géométrie des canaux d'agent de refroidissement (26) dans la zone d'alimentation en forme d'entonnoir des parois latérales larges (20) et la géométrie des canaux d'agent de refroidissement dans la région de déplacement des parois latérales étroites (21, 22) sont différentes.
  12. Lingotière de coulée continue suivant l'une quelconque des revendications 7 à 10, caractérisée en ce que des groupes de canaux d'agent de refroidissement voisins (26) sont raccordés par des canalisations à des stations de distribution d'agent de refroidissement (28) à commande individuelle, dans laquelle au moins une station de distribution d'agent de refroidissement (28) est chaque fois associée à la zone d'alimentation en forme d'entonnoir (20) et aux régions de déplacement des parois latérales étroites (21, 22) de chaque paroi latérale large (1, 2).
  13. Lingotière de coulée continue suivant l'une quelconque des revendications 1 à 12, caractérisée en ce qu'au moins les faces intérieures des parois latérales larges (1, 2) formant la cavité de moulage (5) sont formées de différents matériaux dans le sens de la coulée (6), dans laquelle le matériau employé dans la région du ménisque de coulée présente une conductibilité thermique inférieure à celle du matériau employé pour la partie des parois latérales larges (1, 2) qui la suit dans le sens de la coulée (6).
  14. Lingotière de coulée continue suivant l'une quelconque des revendications 1 à 13, caractérisée en ce que les dispositifs de déplacement (9, 10, 12, 13) sont équipés de moyens d'entraínement électromécaniques ou hydrauliques.
  15. Lingotière de coulée continue suivant l'une quelconque des revendications 1 à 14, caractérisée en ce que le contour des parois latérales larges (1, 2) dans la zone d'alimentation en forme d'entonnoir (20) est de forme parabolique dans le sens de la coulée (6).
  16. Lingotière de coulée continue suivant l'une quelconque des revendications 1 à 14, caractérisée en ce que le contour des parois latérales étroites (3, 4) est de forme parabolique dans le sens de la coulée (6) et les parois latérales étroites (3, 4) sont pourvues de part et d'autre de dégagements d'arêtes (30), dans une région (29) qui s'étend en dessous du ménisque de coulée jusqu'à la sortie de la lingotière.
EP99950385A 1998-12-23 1999-11-02 Coquille de coulee en continue Expired - Lifetime EP1140389B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT216798 1998-12-23
AT0216798A AT407351B (de) 1998-12-23 1998-12-23 Stranggiesskokille
PCT/AT1999/000258 WO2000038857A1 (fr) 1998-12-23 1999-11-02 Coquille de coulee en continu

Publications (2)

Publication Number Publication Date
EP1140389A1 EP1140389A1 (fr) 2001-10-10
EP1140389B1 true EP1140389B1 (fr) 2002-07-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP99950385A Expired - Lifetime EP1140389B1 (fr) 1998-12-23 1999-11-02 Coquille de coulee en continue

Country Status (6)

Country Link
US (1) US6585029B1 (fr)
EP (1) EP1140389B1 (fr)
JP (1) JP2002533220A (fr)
AT (2) AT407351B (fr)
DE (1) DE59902085D1 (fr)
WO (1) WO2000038857A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010061828A1 (de) 2010-07-28 2012-02-02 Sms Siemag Ag Stranggießkokille

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20051765A1 (it) * 2005-09-22 2007-03-23 Danieli Off Mecc Lingottiera per colata di bramme
DE102008057888A1 (de) 2008-09-23 2010-03-25 Sms Siemag Aktiengesellschaft Stranggießkokille

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Publication number Priority date Publication date Assignee Title
DE2620751A1 (de) 1976-05-11 1977-11-17 Kloeckner Werke Ag Vorrichtung zur aenderung des gegenseitigen abstandes der seitenplatten von kokillen fuer stranggiessanlagen und zur vorgabe der konizitaet
DE3400220A1 (de) * 1984-01-05 1985-07-18 SMS Schloemann-Siemag AG, 4000 Düsseldorf Kokille zum stranggiessen von stahlband
AT379093B (de) 1984-02-16 1985-11-11 Voest Alpine Ag Durchlaufkokille fuer eine stranggiessanlage
US5279354A (en) * 1990-11-30 1994-01-18 Acutus Industries, Inc. Method of continuous casting with changing of slab width
DE4343124C2 (de) * 1993-12-17 1996-05-23 Schloemann Siemag Ag Kokille zum Stranggießen von Stahlband
DE4403050C1 (de) * 1994-01-28 1995-09-28 Mannesmann Ag Stranggießkokille zum Führen von Strängen
AT404235B (de) * 1995-04-18 1998-09-25 Voest Alpine Ind Anlagen Stranggiesskokille
DE19741131C2 (de) * 1997-09-15 2001-06-28 Sms Demag Ag Stranggießkokille
DE19753959A1 (de) * 1997-12-05 1999-06-10 Schloemann Siemag Ag Kokille mit Breitseiten- und Schmalseitenanstellung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010061828A1 (de) 2010-07-28 2012-02-02 Sms Siemag Ag Stranggießkokille
WO2012013450A1 (fr) 2010-07-28 2012-02-02 Sms Siemag Ag Coquille pour coulée continue

Also Published As

Publication number Publication date
ATA216798A (de) 2000-07-15
US6585029B1 (en) 2003-07-01
ATE220582T1 (de) 2002-08-15
EP1140389A1 (fr) 2001-10-10
JP2002533220A (ja) 2002-10-08
AT407351B (de) 2001-02-26
DE59902085D1 (de) 2002-08-22
WO2000038857A1 (fr) 2000-07-06

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