US20060102317A1 - Electromagnetic braking device for molten steel that flows into a continuous casting mold - Google Patents

Electromagnetic braking device for molten steel that flows into a continuous casting mold Download PDF

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Publication number
US20060102317A1
US20060102317A1 US10/524,348 US52434805A US2006102317A1 US 20060102317 A1 US20060102317 A1 US 20060102317A1 US 52434805 A US52434805 A US 52434805A US 2006102317 A1 US2006102317 A1 US 2006102317A1
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US
United States
Prior art keywords
braking device
core
mold
accordance
water tanks
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.)
Abandoned
Application number
US10/524,348
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English (en)
Inventor
Peter Jonen
Karl Rittner
Jurgen Muller
Hans Streubel
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
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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
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Assigned to SMS DEMAG AG reassignment SMS DEMAG AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MULLER, JURGEN, STREUBEL, HANS, RITTNER, KARL, JONEN, PETER
Publication of US20060102317A1 publication Critical patent/US20060102317A1/en
Abandoned legal-status Critical Current

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    • 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
    • B22D11/18—Controlling or regulating processes or operations for pouring
    • B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
    • B22D11/186—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by using electric, magnetic, sonic or ultrasonic means
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings
    • 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 concerns an electromagnetic braking device for molten steel flowing into a continuous casting mold, which comprises at least one magnet coil with a ferromagnetic core assigned to the broad sides of the mold.
  • the casting stream flowing into the mold is braked and straightened by a magnetic field acting between the broad sides of the continuous casting mold.
  • ferromagnetic cores are mounted on copper plates on the broad side of the continuous casting mold and are energized by coils surrounding them. The braking and straightening of the casting stream effected by the magnetic field quiets the steel bath and reduces turbulence in it for the purpose of achieving uniform casting of steel strands.
  • Electromagnetic brakes that are permanently integrated in molds are well known.
  • a disadvantage of this solution to the problem is that, due to the electromagnetic brake, the oscillating masses of the mold are significantly increased.
  • an electromagnetic brake is required for each mold, which results in high capital costs.
  • An improvement is achieved by the so-called window solution, in which an electromagnetic brake is assigned to each strand and remains in the machine when the mold is changed. To carry out a mold change, the electromagnetic brake is moved out of the mold, and after the new mold has been installed, it is moved back into its operating position. This eliminates the time-consuming disconnection and connection of the electrical connections and significantly reduces capital costs.
  • a disadvantage of this window solution is that subsequent retrofitting in an existing plant can be accomplished only by very time-consuming and expensive modification of the support structure of the casting platform. Furthermore, the space requirement for a conventional window solution is extremely great and expensive, especially in the case of multiple-strand plants.
  • the document DE 198 07 842 A1 describes a continuous casting plant with an electromagnetic braking device, which consists of at least one coil which has a ferromagnetic core and is assigned to the broad sides of the mold, and of at least one associated yoke. At least individual parts of the electromagnetic braking device are load-bearing members of the continuous casting mold. The magnetic field generated by the electromagnetic braking device is divided into at least an upper and a lower magnetic field relative to the continuous casting mold. At least the interior of the electromagnetic cores simultaneously constitutes cooling chambers, through which cooling water can be supplied and removed.
  • a not-yet-published patent application with the file number 101 46 993.4 describes the construction of an electromagnetic braking device that is characterized by the fact that the electromagnetic braking device, which consists of a yoke, coil, and ferromagnetic core, can be swiveled into or up to and out of or away from the continuous casting mold by at least one adjusting device. Due to the swiveling by swiveling levers on the mold, the electromagnetic braking device cannot oscillate together with the continuous casting mold.
  • the document EP 0 577 831 B1 describes an electromagnetic braking device for a continuous casting mold with an electromagnet, which has magnetic poles that are mounted on the long sides of a casting mold with a rectangular cross section and are arranged opposite each other.
  • the magnetic poles have a width that is generally the same as the width of the long sides of the casting mold and coils that are wound around the outer edges of the magnet coil.
  • the electromagnet is arranged inside the vertical extent of the casting mold, and an iron core is mounted in such a way that it surrounds the casting mold.
  • the document EP 0 820 824 A1 describes a continuous casting plant with a magnetic field formed in the area of the continuous casting mold.
  • the magnetic field is divided into at least an upper and a lower magnetic field relative to the continuous casting mold.
  • Each of the magnets that are used has a central core that divides on the mold side into at least an upper core for the upper magnetic field and a lower core for the lower magnetic field.
  • the document EP 0 698 434 A1 describes an electromagnetic braking device for a continuous casting plant that consists of a coil with a ferromagnetic core assigned to each of the broad sides of the mold and a yoke that surrounds the mold.
  • the cores are formed by a main core and a partial core on the side of the cast strand, such that different partial cores can be optionally used to adapt the magnetic field to varying casting conditions.
  • WO 01/17,713 A1 describes a continuous casting plant with an electromagnetic braking device, which comprises at least two magnet] cores arranged on each side of a casting mold and thus joined, as well as a yoke, which is removably joined with the two magnet cores and interconnected with them.
  • the yoke carries at least one coil, which is arranged between the magnet cores and connected by the yoke.
  • the objective of the invention is to specify an electromagnetic braking device which has a design that is as uncomplicated as possible and creates the possibility of reducing the oscillating masses of the mold, including the braking device, and especially the possibility of providing uncomplicated means for guiding and influencing the active magnetic field and thus of increasing considerably the magnetic field strength at the same installed power.
  • an electromagnetic braking device of the type specified in the introductory clause of claim 1 , in which the core consists, on the one hand, of a primary part that houses the magnet coil, that can be moved by a drive unit to within a certain distance of the broad-side walls, and that is disconnected from the oscillation and, on the other hand, of additional parts that are permanently installed in water tanks of the mold.
  • the parts of the core When brought together in their operating position, form U-shaped yokes for generating a closed magnetic flux, and when the parts of the core are moved apart, the magnetic flux is interrupted.
  • This design allows easy exchanging of the magnet coil and the movable primary part as necessary in order to adapt the action of the electromagnetic braking device to the given casting conditions without any difficulties.
  • the ferromagnetic additional core parts installed in water tanks are assigned to the yokes.
  • vertical recesses are formed in the broad-side walls on the lateral surfaces that face the water tanks, and ferromagnetic filler pieces are fitted into these recesses.
  • These filler pieces can be of variable length or width and/or depth. This provides a simple means of adapting the electromagnetic field strength to existing continuous casting conditions with gradual variations.
  • the primary part of the core with the magnet coil can be moved in a simple way in guides by means of a hydraulic actuator or electric drive in the direction perpendicular to the broad-side walls.
  • the movable partial core with its primary part and the magnet coil, drive unit, and guides, on the one hand, and the additional parts, which are permanently installed, especially by welding, in water tanks of the mold, on the other hand, do not form a fixed mechanical connection at their contact points but rather are held together by magnetic forces. This makes it possible for the masses of the device that can oscillate and those which cannot oscillate to be separated from each other during operation.
  • the contact points can then be advantageously designed as friction bearings or roller bearings, whose parts assigned to the water tanks are caused, together with the water tanks, to oscillate with the mold, while the parts assigned to the primary part of the core and the magnet coil, including the drive unit and guides, are disconnected from the oscillation.
  • the sliding friction of a friction bearing can be at least mostly eliminated in the region of the contact points by an antifriction layer, especially an air cushion.
  • the air cushion can be maintained without any difficulty by introducing compressed air into the central region of the contact points.
  • FIG. 1 shows a top view of a continuous casting mold with an electromagnetic braking device.
  • FIG. 2 shows the mold with the braking device of FIG. 1 with somewhat modified dimensions.
  • FIG. 1 shows an electromagnetic braking device for molten steel flowing into a continuous casting mold 1 .
  • the electromagnetic braking device comprises at least one magnet coil 2 with a ferromagnetic core 5 that can be assigned to the broad sides 3 , 4 of the mold.
  • the core 5 consists, on the one hand, of a primary part 6 that houses the magnet coil 2 and can be moved to within a certain distance of the broad-side walls 3 , 4 and, on the other hand, of additional parts 8 , 8 ′ that are permanently installed in water tanks 7 , 7 ′ of the mold 1 .
  • the parts 6 , 8 of the core 5 When brought together in their operating position, the parts 6 , 8 of the core 5 form U-shaped yokes 9 , 9 ′ for generating a closed magnetic flux 10 , and when the parts 6 , 8 of the core 5 are moved apart, as shown in the upper half of FIG. 1 , the magnetic flux 10 is interrupted.
  • FIG. 2 shows that the ferromagnetic additional parts 8 , 8 ′ of the core 5 , which are installed in water tanks 7 , 7 ′, can be assigned to the yokes 9 , 9 ′.
  • vertical recesses 11 , 11 ′ are formed in the broad-side walls 3 , 4 on the lateral surfaces that face the water tanks 7 , 7 ′, and ferromagnetic filler pieces 12 , 12 ′ can be fitted into these recesses.
  • These filler pieces 12 , 12 ′ can be of variable length or width and/or depth if the field strength of the magnetic field is to be adapted to customary operating parameters of the casting operation of the mold.
  • the primary part 6 of the core 5 with the magnet coil 2 can be moved in guides 13 , 13 ′ by means of a hydraulic actuator 15 or electric drive 14 in the direction perpendicular to the broad-side walls 3 , 4 of the mold 5 .
  • the magnet coil 2 and magnet core 5 can be easily exchanged in this way and can be adapted to the current operating conditions with little expense and work time.
  • An essential refinement of the device with mold and braking device in accordance with the invention is that the movable partial core with its primary part 6 and the magnet coil 2 , drive unit 14 , and guides 13 , on the one hand, and the additional core parts 8 , 8 ′, which are permanently installed, especially by welding, in water tanks 7 , 7 ′ of the mold 1 , on the other hand, do not form a fixed mechanical connection at their contact points 16 , 16 ′ but rather are held together by magnetic forces.
  • the contact points 16 , 16 ′ are designed as friction bearings or roller bearings 17 , 17 ′, whose parts 8 , 8 ′ assigned to the water tanks 7 , 7 ′ are caused, together with the water tanks, to oscillate with the mold 1 , while the parts assigned to the primary part 6 of the core 5 and the magnet coil 2 , including the drive unit 14 and guides 13 , are disconnected from the oscillation.
  • the expenditure of force required for the oscillation is released from the load by co-oscillating additional loads of the braking device.
  • the sliding friction of a friction bearing 17 , 17 ′ is at least mostly eliminated in the region of the contact points 16 , 16 ′ by an antifriction layer 18 , 18 ′, especially an air cushion.
  • the air cushion can be simply and reliably maintained by introducing compressed air into the central region of the contact points 16 , 16 ′.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Continuous Casting (AREA)
  • Braking Arrangements (AREA)
US10/524,348 2002-08-14 2003-07-18 Electromagnetic braking device for molten steel that flows into a continuous casting mold Abandoned US20060102317A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10237188A DE10237188A1 (de) 2002-08-14 2002-08-14 Elektromagnetische Bremsvorrichtung für in eine Stranggießkokille einströmende Stahlschmelze
DE10237188.1 2002-08-14
PCT/EP2003/007811 WO2004022264A1 (de) 2002-08-14 2003-07-18 Elektromagnetische bremsvorrichtung für in eine stranggiesskokille einströmende stahlschmelze

Publications (1)

Publication Number Publication Date
US20060102317A1 true US20060102317A1 (en) 2006-05-18

Family

ID=30775253

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/524,348 Abandoned US20060102317A1 (en) 2002-08-14 2003-07-18 Electromagnetic braking device for molten steel that flows into a continuous casting mold

Country Status (11)

Country Link
US (1) US20060102317A1 (enExample)
EP (1) EP1528964B1 (enExample)
JP (1) JP4413140B2 (enExample)
KR (1) KR101086664B1 (enExample)
CN (1) CN100335205C (enExample)
AT (1) ATE426474T1 (enExample)
AU (1) AU2003250098A1 (enExample)
CA (1) CA2495362C (enExample)
DE (2) DE10237188A1 (enExample)
ES (1) ES2324862T3 (enExample)
WO (1) WO2004022264A1 (enExample)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005042370A1 (de) 2005-09-07 2007-03-15 Sms Demag Ag Bauteil für eine Stranggießkokille und Verfahren zur Herstellung des Bauteils
JP4858037B2 (ja) * 2006-09-20 2012-01-18 住友金属工業株式会社 連続鋳造用鋳型およびそれを用いた連続鋳造方法
JP5023989B2 (ja) * 2007-11-16 2012-09-12 住友金属工業株式会社 電磁攪拌・電磁ブレーキ兼用電磁コイル装置
JP5023990B2 (ja) * 2007-11-16 2012-09-12 住友金属工業株式会社 電磁攪拌・電磁ブレーキ兼用電磁コイル装置
DE102007057424A1 (de) 2007-11-29 2009-06-04 Sms Demag Ag Brems-/Rührspulenanordnung an Stranggießkokillen
DE102009029889A1 (de) 2008-07-15 2010-02-18 Sms Siemag Ag Elektromagnetische Bremseinrichtung an Stranggießkokillen
DE102010022691A1 (de) * 2010-06-04 2011-12-08 Sms Siemag Ag Stranggießvorrichtung mit einer Anordnung elektromagnetischer Spulen
ES2404980R1 (es) * 2011-11-14 2013-09-19 Bsh Electrodomesticos Espana Encimera de cocción a gas
DE102015207342B4 (de) * 2015-04-22 2021-09-23 BSH Hausgeräte GmbH Wäschepflegegerät mit einem Dosiersystem
WO2022211538A1 (ko) * 2021-04-01 2022-10-06 주식회사 퓨쳐캐스트 전자기 교반모듈을 구비한 세미솔리드 다이캐스팅 장치

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5613548A (en) * 1994-08-22 1997-03-25 Sms Schloemann-Siemag Aktiengesellschaft Continuous casting plant for casting thin slabs
US5664619A (en) * 1993-01-19 1997-09-09 Asea Brown Boveri Ab Device in continuous casting in a mould

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69701857T2 (de) * 1996-02-13 2000-12-07 Abb Ab, Vaesteras Vorrichtung zum giessen in eine form
AU716170B2 (en) * 1997-05-29 2000-02-17 Kawasaki Steel Corporation Magnetic brake apparatus for continuous casting mold and continuous casting method using the same
FR2772294B1 (fr) * 1997-12-17 2000-03-03 Rotelec Sa Equipement de freinage electromagnetique d'un metal en fusion dans une installation de coulee continue
SE515990C2 (sv) * 1999-09-03 2001-11-05 Abb Ab Anordning för kontinuerlig eller halvkontinuerlig gjutning av metaller
FR2801523B1 (fr) * 1999-11-25 2001-12-28 Usinor Procede de coulee continue des metaux du type utilisant des champs electromagnetiques, et lingotiere et installation de coulee pour sa mise en oeuvre
DE10146993A1 (de) * 2001-09-25 2003-04-10 Sms Demag Ag Elektromagnetische Bremsvorrichtung für die Kokille einer Stranggießanlage
CN2504012Y (zh) * 2001-11-05 2002-08-07 鞍钢矿山耐磨材料有限公司 环岛型水冷铸段模具

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5664619A (en) * 1993-01-19 1997-09-09 Asea Brown Boveri Ab Device in continuous casting in a mould
US5613548A (en) * 1994-08-22 1997-03-25 Sms Schloemann-Siemag Aktiengesellschaft Continuous casting plant for casting thin slabs

Also Published As

Publication number Publication date
CN1675012A (zh) 2005-09-28
CN100335205C (zh) 2007-09-05
CA2495362A1 (en) 2004-03-18
CA2495362C (en) 2010-11-16
WO2004022264A1 (de) 2004-03-18
KR101086664B1 (ko) 2011-11-24
EP1528964B1 (de) 2009-03-25
EP1528964A1 (de) 2005-05-11
DE50311342D1 (de) 2009-05-07
AU2003250098A1 (en) 2004-03-29
ATE426474T1 (de) 2009-04-15
JP4413140B2 (ja) 2010-02-10
DE10237188A1 (de) 2004-02-26
ES2324862T3 (es) 2009-08-18
KR20050056968A (ko) 2005-06-16
JP2006502004A (ja) 2006-01-19

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SMS DEMAG AG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:JONEN, PETER;RITTNER, KARL;MULLER, JURGEN;AND OTHERS;REEL/FRAME:017023/0696;SIGNING DATES FROM 20050214 TO 20050224

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION