EP0036611B1 - Procédé et dispositif pour soutenir une barre d'acier fabriquée par un procédé de coulée continue - Google Patents

Procédé et dispositif pour soutenir une barre d'acier fabriquée par un procédé de coulée continue Download PDF

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Publication number
EP0036611B1
EP0036611B1 EP81101969A EP81101969A EP0036611B1 EP 0036611 B1 EP0036611 B1 EP 0036611B1 EP 81101969 A EP81101969 A EP 81101969A EP 81101969 A EP81101969 A EP 81101969A EP 0036611 B1 EP0036611 B1 EP 0036611B1
Authority
EP
European Patent Office
Prior art keywords
strand
stirrer
rollers
continuous casting
guide rollers
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
EP81101969A
Other languages
German (de)
English (en)
Other versions
EP0036611A1 (fr
Inventor
Adalbert Röhrig
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.)
SMS Concast AG
Original Assignee
Concast Holding AG
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 Concast Holding AG filed Critical Concast Holding AG
Publication of EP0036611A1 publication Critical patent/EP0036611A1/fr
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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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/122—Accessories for subsequent treating or working cast stock in situ using magnetic fields

Definitions

  • the present invention relates to a method and a device for supporting a steel strand produced in the continuous casting process, the liquid core of which is stirred electromagnetically.
  • the melting sump is only moved directly in the effective range of the fixed stirrer, which also limits the amount of steel moved due to the limited stirrer size. This is where the invention comes in with the aim of preventing the strand shell of the unsupported strand section, which is temporarily located in the influence of the stirrer, from bulging out.
  • the oscillation of the guide rollers ensures that the time interval during which the respective strand section below the stirrer is unsupported is reduced to a level that is harmless with regard to the strand bulge. Bulging of the strand shell can be largely prevented, or beginning, smaller bulges are pushed back by the rollers moving back and forth. On top of that, the already good heat dissipation from the strand via the rollers is increased due to the oscillation, which increases the strand shell growth.
  • stirrer Due to the fact that the stirrer is also oscillated, its magnetic field also influences a much longer area of the melting sump, as seen in the longitudinal direction of the strand, which means that a relatively large strand section can also be stirred with a small dimensioned stirrer. On top of that, the oscillation movement forces the melt into a helical flow, which has a positive effect on the vortexing of the liquid core which influences the solidification.
  • the device according to the invention is characterized in that the stirrer is provided with an oscillation device.
  • the stirrer is provided with support rollers, whereby bending of the rollers can be avoided.
  • support rollers which significantly reduces the space required above and below the stirrer for the oscillation, and thus the unsupported strand sections are also shortened.
  • the same effect can also be achieved with divided guide rollers, which means that the support rollers can be dispensed with.
  • 1, 1 denotes a water-cooled, oscillating, curved continuous mold for casting a slab.
  • Liquid steel is introduced into the mold from a casting vessel (not shown) using a pouring tube.
  • the steel solidifies superficially in the mold 1 and forms a strand shell which grows steadily in the casting direction and which is supported and guided by the subsequent guide rollers 3 of a curved strand path 4.
  • spray nozzles 5 attached between the rollers, water is sprayed onto the surface of the strand for further cooling of the strand 2.
  • the strand is pulled out and straightened by a drive-straightening unit 7.
  • the stirrer 8 in a section of FIG. 1, the stirrer 8 is shown with a straight line 2 for the sake of simplification. At a distance of approx. 5 m below the mold end, the stirrer 8 in the form of a traveling field magnet for stirring the strand sump 9 is installed on the inside of the strand 4 at a short distance from the surface of the strand. Viewed in the casting direction, a guide roller 10, preferably made of non-magnetizable steel, is attached to the upper and lower stirrer side. By means of an oscillation device 25, the stirrer 8 can be moved back and forth along the strand path, as indicated by arrows 11, whereby it is moved alternately into the upper layer 14 and the lower layer 15, shown in broken lines and partially.
  • the oscillation device 25 consists of a lever system 20 provided with an eccentric 21, the levers 20 being supported by means of fixed supports 22.
  • stirrer 8 it is also possible to move the stirrer 8 back and forth on guide rails arranged concentrically to the strand path by means of a reversible drive motor.
  • the slabs cast on the system described had a format of 300 x 1800 mm, the pull-out speed was approximately 1.0 m / min, the guide roller diameter was 250 mm.
  • the stirrer 8 had a length of 800 mm when viewed in the pouring direction, so that there was a distance 12 of approximately 1100 mm between the guide rollers 10 attached to the stirrer.
  • the oscillation stroke of the stirrer 8 was approximately half a stirrer width or approximately half a roller rotation, so that unsupported strand sections 13 of approximately 400 mm resulted above and below the stirrer.
  • the active surface 15 of the stirrer 8 was designed to be convex, concentric to the guideway, so that it was at the same distance from the surface of the strand at every point in its path of movement, which made it possible to avoid additional electromagnetic losses.
  • the stirrer 8 and the associated rollers 10 can also be attached to the outer side of the strand guide, the stirrer side facing the strand having a corresponding concave curvature.
  • the active surface 15 of the stirrer 8 is of course also straight.
  • top and bottom edges of the stirrer adjacent to the strand can be designed with a bevel to achieve a smaller distance 12 between the rollers 10. It is also possible, as shown in FIG. 3, to use small rollers 23 with additional support rollers 24 which are attached to the stirrer and prevent deflection.
  • roller diameter of the guide rollers 23 of e.g. Only 100 mm and an oscillation stroke of the order of half a stirrer width make these rollers 23 a full revolution, as a result of which good cooling of the rollers is achieved and thermal distortion can be avoided.
  • guide rollers 23 and support rollers 24 can have a different size ratio to one another than shown in FIG. 3.
  • rollers 23 or the rollers 24 are also possible to divide the rollers 23 or the rollers 24 into a plurality of individually mounted roller sections.
  • the stirrer can additionally be equipped with spray nozzles which act from its side 15 facing the rod and which are also oscillated, as a result of which advantageous cooling of the strand in the stirrer active region 12 and 13 is achieved.

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

Claims (3)

1. Procédé pour soutenir une barre d'acier produite selon le procédé de coulée continue avec agitation par voie électromagnétique du coeur liquide de la barre, caractérisé en ce que, pendant la coulée, on fait osciller des rouleaux-guides (3) ensemble avec l'agitateur (8) agissant entre eux dans le sens de la longueur de la barre.
2. Dispositif pour la mise en oeuvre du procédé selon la revendication 1, dans une installation de coulée continue d'acier formée d'une lingotière de coulée continue (1) suivie d'un guide à rouleaux et équipée d'un agitateur électromagnétique (8) muni de rouleaux-guides (3), caractérisé en ce que l'agitateur (8) est pourvu d'un mécanisme d'oscillation (25).
3. Dispositif selon la revendication 2, caractérisé en ce que l'agitateur (8) est pourvu de rouleaux d'appui (24) pour les rouleaux-guides (23).
EP81101969A 1980-03-20 1981-03-17 Procédé et dispositif pour soutenir une barre d'acier fabriquée par un procédé de coulée continue Expired EP0036611B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH219180A CH646623A5 (de) 1980-03-20 1980-03-20 Verfahren und einrichtung zum stuetzen eines im stranggiess-verfahren hergestellten stahlstranges, dessen fluessiger kern elektromagnetisch geruehrt wird.
CH2191/80 1980-03-20

Publications (2)

Publication Number Publication Date
EP0036611A1 EP0036611A1 (fr) 1981-09-30
EP0036611B1 true EP0036611B1 (fr) 1983-06-29

Family

ID=4228021

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81101969A Expired EP0036611B1 (fr) 1980-03-20 1981-03-17 Procédé et dispositif pour soutenir une barre d'acier fabriquée par un procédé de coulée continue

Country Status (5)

Country Link
US (1) US4375830A (fr)
EP (1) EP0036611B1 (fr)
JP (1) JPS6011586B2 (fr)
CH (1) CH646623A5 (fr)
DE (1) DE3160514D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT408963B (de) * 2000-06-05 2002-04-25 Voest Alpine Ind Anlagen Verfahren zum herstellen eines stranggegossenen vorproduktes und stranggiessanlage dazu

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1181219B (it) * 1984-09-17 1987-09-23 Danieli Off Mecc Colata continua con agitatori polifunzionali
DE10024508A1 (de) * 2000-05-18 2001-11-22 Sms Demag Ag Verfahren und Anlage zum Stranggießen von Brammen, insbesondere von Dünnbrammen mit vergleichsweise hohen Gießgeschwindigkeiten
WO2008089794A1 (fr) * 2007-01-26 2008-07-31 Volvo Construction Equipment Ab Circuit hydraulique destiné à faire fonctionner un outil
AT519029B1 (de) * 2016-08-31 2019-10-15 Primetals Technologies Austria GmbH Rührspulenanordnung in einer Stranggießanlage
MX2021000918A (es) * 2018-07-25 2021-06-23 Southwire Co Llc Potenciación ultrasónica de materiales de fundición por enfriamiento directo.
AT525111A1 (de) * 2021-06-08 2022-12-15 Primetals Technologies Austria GmbH Rühren bei gegossenen Vorblöcken mit oszillierendem Strangrührer

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH345121A (de) * 1956-09-21 1960-03-15 Moossche Eisenwerke Ag Verfahren zum kontinuierlichen Giessen eines Metallstranges und Stranggiessanlage zur Durchführung dieses Verfahrens
US3882923A (en) * 1972-06-08 1975-05-13 Siderurgie Fse Inst Rech Apparatus for magnetic stirring of continuous castings
AT331436B (de) * 1972-06-08 1976-08-25 Siderurgie Fse Inst Rech Stranggussanlage
US3952791A (en) * 1974-01-08 1976-04-27 Nippon Steel Corporation Method of continuous casting using linear magnetic field for core agitation
JPS5348171B2 (fr) * 1974-06-24 1978-12-27
JPS5119414A (ja) * 1974-08-09 1976-02-16 Oki Electric Ind Co Ltd Setsuzokukiseihoshiki
SE410153B (sv) * 1976-05-21 1979-10-01 Asea Ab Anleggning vid strenggjutning
JPS5316365A (en) * 1976-06-17 1978-02-15 Analytical Prod Gassliquid equilibrium method and its apparatus
JPS5342135A (en) * 1976-09-30 1978-04-17 Nippon Steel Corp Continuous casting equipment with electromagnetic stirrer
DE2818183C2 (de) * 1978-04-26 1983-09-08 Aeg-Elotherm Gmbh, 5630 Remscheid Vorrichtung an Stranggießanlagen zum elektromagnetschen Rühren des Strangsumpfes
DE2828160B2 (de) * 1978-06-23 1981-04-30 Aeg-Elotherm Gmbh, 5630 Remscheid Elektromagnetische Rühreinrichtung für Stranggießanlagen
EP0008376B2 (fr) * 1978-07-28 1989-04-05 Concast Holding Ag Procédé de coulée continue de métal dans une lingotière et action d'un champ électro-magnétique
CH632431A5 (de) * 1978-10-06 1982-10-15 Concast Ag Verfahren zum stranggiessen von stahl.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT408963B (de) * 2000-06-05 2002-04-25 Voest Alpine Ind Anlagen Verfahren zum herstellen eines stranggegossenen vorproduktes und stranggiessanlage dazu

Also Published As

Publication number Publication date
JPS6011586B2 (ja) 1985-03-27
EP0036611A1 (fr) 1981-09-30
CH646623A5 (de) 1984-12-14
JPS56165550A (en) 1981-12-19
DE3160514D1 (en) 1983-08-04
US4375830A (en) 1983-03-08

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