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EP1412110A1 - Procede de coulee continue verticale d'un feuillard d'acier - Google Patents

Procede de coulee continue verticale d'un feuillard d'acier

Info

Publication number
EP1412110A1
EP1412110A1 EP02724033A EP02724033A EP1412110A1 EP 1412110 A1 EP1412110 A1 EP 1412110A1 EP 02724033 A EP02724033 A EP 02724033A EP 02724033 A EP02724033 A EP 02724033A EP 1412110 A1 EP1412110 A1 EP 1412110A1
Authority
EP
European Patent Office
Prior art keywords
section
strand
cross
gap
casting
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.)
Granted
Application number
EP02724033A
Other languages
German (de)
English (en)
Other versions
EP1412110B1 (fr
Inventor
Anton Dipl.-Ing. Hulek
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1412110A1 publication Critical patent/EP1412110A1/fr
Application granted granted Critical
Publication of EP1412110B1 publication Critical patent/EP1412110B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/14—Soft reduction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/18—Vertical rolling pass lines

Definitions

  • the invention relates to a method for the vertical continuous casting of a steel strip, in which a strand with a parallelogram-shaped cross-section is first cast in a moving mold and then transferred from this initial cross-section with solidified longitudinal edges and a liquid core into a strip with a plane-parallel cross-section, in that one has already solidified , increasingly thicker shell of the strand is compressed by cooling in a deformation device without compressing the solidified longitudinal edges in the casting direction.
  • the parallelogram-shaped cross-section of the strand is converted into a plane-parallel cross-section in a deformation device which is composed of a plurality of longitudinal beams opposite one another with respect to the strip, which form a gap between them with a parallelogram-shaped inlet cross-section and a plane-parallel outlet cross-section, with the aid of in the Longitudinal beam mounted form rollers.
  • the longitudinal beams are pivotally mounted on the inlet side and are subjected to pressure in the sense of mutual pivoting, the condition for uniform cooling results in a thickness dependent on the passage speed of the strand through the mold and the shaping device for the pre-solidified strip in the area of the shaping device, if the shells are pressed against each other.
  • the degree of solidification, which determines the strip thickness depends on the cooling duration, which is a function of the speed of the strip through the mold and the deformation device. This means that a constant casting speed must be ensured for a uniform, constant strip thickness.
  • a constant casting speed has operational disadvantages with regard to the cooperation with an upstream steelworks and the possible immediate further processing of the preliminary strip in a subsequent rolling mill, because circumstances can occur in the steelworks as well as in the rolling mill that require a change in the casting speed or the casting performance do. Apart from this, temperature fluctuations in the molten steel can be expected, which also results in fluctuations in the thickness of the preliminary strip.
  • the invention is therefore based on the object of avoiding these disadvantages and of designing a method of the type described at the outset such that, despite changes in the casting speed and the temperature of the molten steel, a constant strip thickness can be ensured without the risk of edge curling or cracking.
  • the invention solves this problem in that the strand after compression into a band with a still liquid core during solidification of the core is only guided in a mold gap with a constant width corresponding to the thickness of the solidified longitudinal edges and is calibrated in the process.
  • the final tape thickness is determined by the mold gap dimensions and not determined by the casting speed.
  • the ferrostatic pressure effective in the area of the remaining liquid core ensures that the shells are in contact with the shaped elements defining the gap geometry. Different thicknesses of the liquid core resulting from different casting speeds can therefore not lead to different strip thicknesses if only care is taken to ensure that the core completely solidifies in the region of the constant thickness of the mold gap. It is essential here that no compression of the band associated with stretching can occur in the edge region.
  • the mold gap has a width corresponding to the thickness of the solidified longitudinal edges. Since the shell of the strand is transferred from a parallelogram-shaped cross-section to a plane-parallel cross-section without casting through in a co-rotating mold in the shaping device To compress longitudinal edges of the shell, these solidified longitudinal edges of the parallelogram-shaped cross section also determine the later thickness of the solidified band, so that there is no compression of the longitudinal edge associated with stretching before the band is completely solidified.
  • the strip thickness can be slightly reduced while stretching, preferably by means of force-controlled and displacement-controlled rollers, which leads to a corresponding structural improvement.
  • the solidified strip can be additionally reduced in thickness after calibration by continuous rolling, which can significantly reduce the rolling effort in the rolling mill.
  • a continuous casting system consists of a mold with a parallelogram-shaped mold gap cross section, which runs along with the strand to be cast, and a subsequent deforming device with a plurality of mold gaps with a parallelogram inlet that are opposite one another with respect to the strand - And there is a plane-parallel discharge cross-section forming roles. It must be ensured that the deformation device is followed by a calibration device with a predetermined shape gap profile, which has a section with a constant mold gap thickness at least on the inlet side, so that the strip solidifies completely in the section of the mold gap with a constant thickness.
  • the point of solidification of the strip along the mold gap will occur. If the casting speed is reduced, solidification of the strip in an initial section, that is to say in the upper region, and with increased casting speed in an end section, that is to say in the lower region of the mold gap of the calibration device.
  • the calibration device has calibration rolls which limit the mold gap and can be adjusted to set the mold gap profile. Between these calibration rollers, not only can the thickness of the strip be advantageously determined while it is being solidified, but also a feed can be achieved if these calibration rollers are driven. Because of the advanced solidification of the belt, there is no need for a continuous belt guide, so that coolant can be applied to the belt between the calibration rollers.
  • a thickness reduction for example in the order of 1 to 5%, can be carried out via the remaining outlet-side calibration rollers, which requires a correspondingly preset shape gap course.
  • the calibration device can also extend far into the casting arch, which allows a reduction in the overall height.
  • a reduction stand can additionally be provided on the discharge side of the calibration device, with the aid of which comparatively thin pre-strips can be fed to a connected rolling mill.
  • Fig. 2 shows a simplified cross section of the calibration device on a larger scale 3 to 5 the essential cross-sectional changes of a strand cast according to the prior art during its forming into a band and the
  • FIGS. 3 to 5 a representation corresponding to FIGS. 3 to 5 of the cross-sectional changes of a strand cast according to the invention during its forming into a band.
  • the continuous casting installation shown for the vertical continuous casting of a steel strip 1 has a moving mold 2, a deformation device 4 adjoining it via a strand guide 3, and a calibration device 5, from which the strip 1 exits into a casting sheet 6 in order to move from a vertical one to be redirected into a horizontal course.
  • the calibration device 5 can at least partially extend into the area of the casting curve 6, which allows a lower overall height.
  • the moving mold 2 consists of two opposing, endlessly rotating plate chains 7, which enclose a constant mold gap between them, into which a pouring tube 8 attached to a casting container opens.
  • the deformation device 4 has a plurality of longitudinal beams 12 which are opposite one another with respect to the strand 11 and form the gap between them and which are pivotally mounted on the inlet side about axes 13 and are acted upon by pressure cylinders 14 in the sense of mutual pivoting.
  • the molding gap is limited by molding rollers 15.
  • this deformation device 4 the shells 9 are guided against one another, displacing the liquid core upwards, until they are pressed against one another and form a continuously solidified band, the thickness of which remains at constant cooling conditions depends on the casting speed or the temperature of the molten steel.
  • the shells 9 in the deformation device 4 are only brought together to form a pian parallel cross section with a still liquid core 16, as is shown in FIG. 8. Care must be taken to ensure that the longitudinal edges 10 are not subjected to any compression associated with stretching.
  • the solidification of the liquid core 16 takes place only in the calibration device 5, which has a mold gap of constant thickness at least on the inlet side, in the area of which the liquid core 16 solidifies until a strip 1 of constant thickness is obtained according to FIG. 9.
  • the shells 9 are pressed against the calibration device 5 by the ferrostatic pressure in the area of the liquid core 16, so that the predetermined mold gap width determines the strip thickness independently of the casting speed or the thickness of the liquid core 16.
  • the mold gap width must, however, be selected in accordance with the thickness of the solidified longitudinal edges 10, so that stretching of the band 1 at the edge is avoided.
  • the cooling, the speed of passage of the strand 11 through the mold 2 and the shaping device 4 and the length of the mold 2 and the shaping device 4 are coordinated with one another such that the strand 11 still has a liquid core 16 when it emerges from the shaping device 4 has, because the solidification of the tape 1 should only take place in the calibration device 5.
  • the calibration rollers 17 of the calibration device 5 are adjusted via adjusting cylinders 18 to a shape gap course predetermined for the calibration process. Since there is considerable ferrostatic pressure in the area of the liquid core 16, the shells 9 of the band 1 in the area of the calibration device 5 are pressed against the calibration rollers 17, which ensures the desired calibration effect, the respective thickness of the liquid core 16 when the Band 1 in the calibration device 5 can vary.
  • the calibration rollers 17 run over the belt width, as can be seen in FIG. 2.
  • the schematically indicated drive 19 of the calibration rollers 17 supports the belt conveyor and is also suitable for a low rolling capacity after the solidification of the liquid core 16, so that after the belt 1 has completely solidified, the calibration rollers 17 are used for a slight reduction in thickness under a stretching effect can.
  • a rolling stand 20 can be arranged directly after the calibration device 5. However, this roll stand 20 can also be provided following the casting arch 6, as is indicated by dash-dotted lines in FIG. 1.

Landscapes

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

Abstract

La présente invention concerne un procédé de coulée continue verticale d'un feuillard d'acier. Selon ce procédé, une barre (11) de section en parallélogramme est d'abord coulée dans une coquille mobile (2), puis cette section de sortie avec des bords longitudinaux complètement solidifiés (10) et un noyau liquide est transformée en une bande (1) de section parallélépipédique, en ce qu'une couche (9) déjà solidifiée de la barre (11), qui devient de plus en plus épaisse par refroidissement est comprimée progressivement dans un dispositif de déformation (4), sans que les bords longitudinaux complètement solidifiés (10) ne soient écrasés dans la direction de coulée. Afin d'obtenir des conditions avantageuses, la barre (11), après la compression en une bande (1) avec un noyau (16) encore liquide, est conduite, au cours de la solidification complète du noyau, uniquement dans une fente de formage qui présente une largeur constante, correspondant à l'épaisseur des bords longitudinaux complètement solidifiés (10), ce qui permet de la calibrer.
EP02724033A 2001-05-07 2002-05-07 Procede et dispositif de coulee continue verticale d'un feuillard d'acier Expired - Lifetime EP1412110B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT7232001 2001-05-07
AT0072301A AT410522B (de) 2001-05-07 2001-05-07 Verfahren und stranggiessanlage zum vertikalen stranggiessen eines stahlbandes
PCT/AT2002/000139 WO2002090018A1 (fr) 2001-05-07 2002-05-07 Procede de coulee continue verticale d'un feuillard d'acier

Publications (2)

Publication Number Publication Date
EP1412110A1 true EP1412110A1 (fr) 2004-04-28
EP1412110B1 EP1412110B1 (fr) 2005-09-21

Family

ID=3679935

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02724033A Expired - Lifetime EP1412110B1 (fr) 2001-05-07 2002-05-07 Procede et dispositif de coulee continue verticale d'un feuillard d'acier

Country Status (8)

Country Link
US (1) US6945311B2 (fr)
EP (1) EP1412110B1 (fr)
JP (1) JP4232867B2 (fr)
KR (1) KR100907570B1 (fr)
CN (1) CN1232369C (fr)
AT (1) AT410522B (fr)
DE (1) DE10291923B4 (fr)
WO (1) WO2002090018A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8953087B2 (en) * 2004-04-08 2015-02-10 Flir Systems Trading Belgium Bvba Camera system and associated methods
DE102006048511A1 (de) * 2006-10-13 2008-04-17 Sms Demag Ag Strangführungsvorrichtung und Verfahren für deren Betrieb
CN104021861B (zh) * 2014-06-26 2016-04-13 国网山东省电力公司莱西市供电公司 一种改进结构的钢带及使用该钢带的电缆
CN115164583B (zh) * 2022-06-01 2024-11-26 上海二十冶建设有限公司 一种转底炉回转框架的安装方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3870970D1 (de) * 1987-04-13 1992-06-17 Thyssen Stahl Ag Verfahren zum herstellen eines stahlbandes.
AT392029B (de) * 1988-02-01 1991-01-10 Hulek Anton Stranggiessanlage zum stranggiessen von stahl
DE3823861A1 (de) * 1988-07-14 1990-01-18 Thyssen Stahl Ag Verfahren und anlage zum herstellen eines stahlbandes mit einer dicke von weniger als 10 mm
ES2089317T3 (es) * 1991-09-19 1996-10-01 Schloemann Siemag Ag Procedimiento e instalacion para la fabricacion de banda de acero.
DE4135214C2 (de) * 1991-09-19 2000-12-14 Sms Demag Ag Verfahren und Anlage zur Herstellung von Stahlband
AT401744B (de) * 1993-10-14 1996-11-25 Voest Alpine Ind Anlagen Verfahren und anlage zum stranggiessen
JP3008821B2 (ja) * 1994-07-29 2000-02-14 住友金属工業株式会社 薄鋳片の連続鋳造方法および装置
US5620045A (en) * 1995-04-24 1997-04-15 Gerding; Charles C. Continuous casting mold formed of plate elements
AU3273399A (en) * 1999-02-26 2000-09-14 Giovanni Arvedi In-line continuous cast-rolling process for thin slabs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02090018A1 *

Also Published As

Publication number Publication date
ATA7232001A (de) 2002-10-15
DE10291923D2 (de) 2004-04-15
EP1412110B1 (fr) 2005-09-21
DE10291923B4 (de) 2011-06-30
WO2002090018A1 (fr) 2002-11-14
CN1232369C (zh) 2005-12-21
KR20030097852A (ko) 2003-12-31
US20040188057A1 (en) 2004-09-30
AT410522B (de) 2003-05-26
US6945311B2 (en) 2005-09-20
JP2004524167A (ja) 2004-08-12
JP4232867B2 (ja) 2009-03-04
KR100907570B1 (ko) 2009-07-14
CN1520344A (zh) 2004-08-11

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