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EP1694455B1 - Frein magnetique pour coquille de coulee continue - Google Patents

Frein magnetique pour coquille de coulee continue Download PDF

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Publication number
EP1694455B1
EP1694455B1 EP04803301A EP04803301A EP1694455B1 EP 1694455 B1 EP1694455 B1 EP 1694455B1 EP 04803301 A EP04803301 A EP 04803301A EP 04803301 A EP04803301 A EP 04803301A EP 1694455 B1 EP1694455 B1 EP 1694455B1
Authority
EP
European Patent Office
Prior art keywords
permanent magnets
mould
mold
magnetic
field strength
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
EP04803301A
Other languages
German (de)
English (en)
Other versions
EP1694455A1 (fr
Inventor
Hans Streubel
Walter Trakowski
Karl Rittner
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 Siemag AG
Original Assignee
SMS Demag 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
Priority claimed from DE102004046729A external-priority patent/DE102004046729A1/de
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1694455A1 publication Critical patent/EP1694455A1/fr
Application granted granted Critical
Publication of EP1694455B1 publication Critical patent/EP1694455B1/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
    • B22D11/10—Supplying or treating molten metal
    • B22D11/11—Treating the molten metal
    • B22D11/114—Treating the molten metal by using agitating or vibrating means
    • B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/02—Use of electric or magnetic effects
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets

Definitions

  • the invention relates to a continuous casting mold, in particular thin-slab mold, are applied in soft permanent magnets for influencing the flow of the liquid metal in the mold by a magnetic field generated by the mold, wherein the permanent magnets above the width and / or height different magnet strengths or different distances to each other have a different field strength and can be moved in different groups to the mold for a different field strength distribution, wherein the permanent magnets are arranged in the water box of the continuous casting mold and can be adjusted for direct contact with the mold plate.
  • the document EP 0 880 417 B1 describes a magnetic brake for the casting of metal in a mold, consisting of a magnetic core and from a supplied with electrical DC or low-frequency alternating current coil. Further, a magnetic return is provided to close the magnetic circuit.
  • the document EP 0 568 579 describes a method for controlling the flow of molten metal into the non-solidified metal portions of a casting mold, supplying at least one molten metal primary stream thereto and forming a casting in the mold, thereby producing at least one static magnetic field of poles adjacent to the mold are arranged and consist of permanent magnets, wherein the magnetic field serves to brake and split the primary flow of molten metal flowing into the mold and to control secondary currents, wherein the magnetic field is arranged substantially over the entire Width of the strand formed in the mold acts.
  • the magnetic field strength is to vary in the plane which extends perpendicular to the casting direction and at the level at which the magnetic field strength reaches its maximum value, within an interval of 60 to 100% of this maximum value, while the field strength at a level with the highest surface / meniscus of the molten metal has a maximum value of 500 gauss.
  • the magnetic field is controlled and distributed by providing the magnetic poles movable and / or with adjustable core elements.
  • the document EP 0 040 383 (B1 ) describes a method for stirring the non-solidified areas in a cast strand, wherein the strand is formed in a mold and a pouring stream flows through a pouring tube or directly into the mold. Where the pouring stream penetrates into the melt already present in the mold, at least one static magnetic field acting in the melt is produced, which brakes the pouring stream and splits it in such a way that its momentum is weakened or consumed.
  • a device provided for this purpose can consist of one or more permanent magnets.
  • the document JP 08155610 has a mold of rectangular design, at the four corners of each permanent magnets for generating magnetic fields south and north are arranged.
  • EP 0 568 579 A discloses a continuous casting mold, in which permanent magnets are attached to influence the flow of the liquid metal on the mold, wherein the magnets have different magnetic field strengths, because they are adjustable via einschlebbare magnetic and non-magnetic core elements.
  • Permanent magnets have the same magnetic induction field strength a much shorter design and thus drastically reduced masses. There is no need for additional means to conduct the magnetic flux in the form of an outer yoke. If necessary, it is sufficient to use the existing within the mold ferromagnetic materials to close the magnetic flux circuit.
  • B z 2 ⁇ B 0 - cosh ⁇ ⁇ z - d 2 H
  • B 0 the field strength of one of the permanent magnets
  • z the distance from one of the magnets
  • d the distance between the magnets
  • h the effective height of the magnet.
  • the effective height h is determined by measurement.
  • cosh is the cosine hyperbolic (see Figure 1).
  • the object of the invention is to provide means for varying the magnetic field strength of permanent magnets on a continuous casting mold.
  • the object is achieved according to the invention in that the permanent magnets are movable on pivotable adjusting means to the mold for adjusting the field strength.
  • the rotation facilitates the separation of the magnets from the passage surface, because according to the regulations for mounting these permanent magnets it is necessary to set them on one edge and then place them on the support with a constantly decreasing angle (see Figure 3).
  • the magnets are not placed directly on the carrier of ferromagnetic material, but for ease of detachment for rotation or mounting a layer of non-ferromagnetic material is placed between them. This can be austenitic steel, but it is also sufficient for a 1 mm thick plastic plate.
  • the uneven distances of the magnets to the passage surface associated with the rotation are magnetically balanced by a passage body through the water box of the casting mold made of ferromagnetic material.
  • the magnetic field generated by the permanent magnets must remain adjustable in its field strength.
  • the permanent magnets are mounted on the teeth of a rake, which engages in the support ribs of the water boxes of the casting mold.
  • a device makes it possible to adjust the distance of the teeth to the mold by displacement. This makes it possible to vary the magnetic field in its strength.
  • the device can be moved by mechanical spindle or by hydraulic cylinder.
  • the previous electrical device for generating the magnetic field is removed and on the then exposed ferromagnetic block (passage window) in the water box, a device for holding the permanent magnets is mounted.
  • This device can be moved by rotation and thus the magnetic field strength can be varied.
  • the device can be moved by a mechanical spindle or by hydraulic cylinders.
  • the magnetic field strength can also be adjusted.
  • Permanent magnets are so strong that they can not be produced over a large area. Such a magnet would be exploded by its own field forces, i. to be torn apart. It is therefore necessary to produce large-area magnets for the width of a continuous casting mold of many individual magnets which are glued on a large-area carrier made of ferromagnetic material to the magnetic flux densities of the many individual magnets to a large magnetic flux, which then the metallurgical effects in the mold has to unite. This is significant in that, because you can set by the same orientation of the magnetic poles, small magnets not arbitrarily close together, finally, the same name poles of the magnets repel. One is thereby forced to make the magnetic carrier multi-layered, since in the second layer by permanent magnets the still open interstices of the first layer must cover.
  • the magnets must not only sit on the teeth of the Rulers, but also on the back of the magnetic carrier (Rulers) made of ferromagnetic material and again in several layers, since otherwise not the required magnetic flux density in the metallurgical part of the mold achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Continuous Casting (AREA)
  • Braking Arrangements (AREA)

Claims (2)

  1. Coquille pour coulée continue, notamment coquille pour brames minces, dans laquelle des aimants permanents sont montés, pour une influence de l'écoulement du métal liquide dans la coquille par un champ magnétique crée sur la coquille, les aimants permanents présentant sur la largeur et/ou sur la hauteur des forces magnétiques d'intensité différente ou différents écarts mutuels, pour une intensité de champ différente, et étant déplaçables de façon différente en groupes vers la coquille, pour une répartition différente de l'intensité de champ, les aimants permanents étant disposés dans des réservoirs à eau de la coquille pour coulée continue et étant susceptibles d'être mis en prise pour un appui direct sur la plaque de la coquille,
    caractérisé en ce que
    les aimants permanents sont déplaçables vers la coquille sur des moyens de réglage pivotants, pour l'adaptation de l'intensité de champ.
  2. Coquille pour coulée continue selon la revendication 1,
    caractérisée en ce que
    les moyens de réglage pour les aimants permanents sont conçus sous la forme de dispositifs rotatifs, ou de broches rotatives.
EP04803301A 2003-12-18 2004-11-26 Frein magnetique pour coquille de coulee continue Expired - Lifetime EP1694455B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10359409 2003-12-18
DE102004046729A DE102004046729A1 (de) 2003-12-18 2004-09-25 Magnetische Bremse für Stranggießkokille
PCT/EP2004/013444 WO2005058530A1 (fr) 2003-12-18 2004-11-26 Frein magnetique pour coquille de coulee continue

Publications (2)

Publication Number Publication Date
EP1694455A1 EP1694455A1 (fr) 2006-08-30
EP1694455B1 true EP1694455B1 (fr) 2007-06-20

Family

ID=34701994

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04803301A Expired - Lifetime EP1694455B1 (fr) 2003-12-18 2004-11-26 Frein magnetique pour coquille de coulee continue

Country Status (9)

Country Link
US (1) US20070089851A1 (fr)
EP (1) EP1694455B1 (fr)
JP (1) JP2007534492A (fr)
KR (1) KR20060120022A (fr)
AT (1) ATE365087T1 (fr)
CA (1) CA2543600A1 (fr)
DE (1) DE502004004157D1 (fr)
ES (1) ES2287797T3 (fr)
WO (1) WO2005058530A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015204123A1 (de) 2014-07-04 2016-01-07 Sms Group Gmbh Vorrichtung zum Beeinflussen einer Strömung eines Flüssigmetalls innerhalb einer Stranggießkokille

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009029889A1 (de) * 2008-07-15 2010-02-18 Sms Siemag Ag Elektromagnetische Bremseinrichtung an Stranggießkokillen
JP5079681B2 (ja) * 2008-12-25 2012-11-21 株式会社神戸製鋼所 鋳型内溶鋼の上昇流に対して静磁場が作用するスラブの連続鋳造設備
DE102010022691A1 (de) * 2010-06-04 2011-12-08 Sms Siemag Ag Stranggießvorrichtung mit einer Anordnung elektromagnetischer Spulen
KR101526454B1 (ko) * 2013-11-22 2015-06-05 주식회사 포스코 전자기 교반 장치 및 교반 방법
BR112016029291A2 (pt) * 2014-06-16 2017-08-22 Abb Schweiz Ag estrutura de aço não magnético, vaso para metal fundido e agitador eletromagnético ou freio eletromagnético

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2628994B1 (fr) * 1988-03-28 1992-04-03 Vives Charles Procede de production de gelees metalliques thixotropes par rotation d'un systeme d'aimants permanents dispose a l'exterieur de la lingotiere
KR930002836B1 (ko) * 1989-04-27 1993-04-10 가와사끼 세이데쓰 가부시까가이샤 정자장을 이용한 강철의 연속 주조방법
SE500745C2 (sv) * 1991-01-21 1994-08-22 Asea Brown Boveri Sätt och anordning vid gjutning i kokill
AU714976B2 (en) * 1996-04-29 2000-01-13 Bhp Steel (Jla) Pty Limited Magnetic braking
SE523157C2 (sv) * 1997-09-03 2004-03-30 Abb Ab Förfarande och anordning för att styra metallflödet vid stränggjutning medelst elektromagnetiska fält
DE10146993A1 (de) * 2001-09-25 2003-04-10 Sms Demag Ag Elektromagnetische Bremsvorrichtung für die Kokille einer Stranggießanlage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015204123A1 (de) 2014-07-04 2016-01-07 Sms Group Gmbh Vorrichtung zum Beeinflussen einer Strömung eines Flüssigmetalls innerhalb einer Stranggießkokille

Also Published As

Publication number Publication date
KR20060120022A (ko) 2006-11-24
US20070089851A1 (en) 2007-04-26
ES2287797T3 (es) 2007-12-16
JP2007534492A (ja) 2007-11-29
ATE365087T1 (de) 2007-07-15
DE502004004157D1 (de) 2007-08-02
EP1694455A1 (fr) 2006-08-30
CA2543600A1 (fr) 2005-06-30
WO2005058530A1 (fr) 2005-06-30

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