EP0922512A1 - Elektromagnetische bremsvorrichtung für stranggiesskokille und stranggiessverfahren, bei dem diese verwendet wird - Google Patents

Elektromagnetische bremsvorrichtung für stranggiesskokille und stranggiessverfahren, bei dem diese verwendet wird Download PDF

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Publication number
EP0922512A1
EP0922512A1 EP98921807A EP98921807A EP0922512A1 EP 0922512 A1 EP0922512 A1 EP 0922512A1 EP 98921807 A EP98921807 A EP 98921807A EP 98921807 A EP98921807 A EP 98921807A EP 0922512 A1 EP0922512 A1 EP 0922512A1
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EP
European Patent Office
Prior art keywords
continuous casting
casting mold
magnetic
electromagnets
magnetic field
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.)
Withdrawn
Application number
EP98921807A
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English (en)
French (fr)
Other versions
EP0922512A4 (de
Inventor
Susumu-Kawasaki Steel Corporation YUHARA
Shigenobu- Kawasaki Steel Corporation TAKATA
Hisashi- Kawasaki Steel Corporation OSANAI
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.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
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 JP13962397A external-priority patent/JP3253012B2/ja
Priority claimed from JP13962497A external-priority patent/JPH10328791A/ja
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Publication of EP0922512A1 publication Critical patent/EP0922512A1/de
Publication of EP0922512A4 publication Critical patent/EP0922512A4/de
Withdrawn legal-status Critical Current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
    • 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

Definitions

  • the present invention relates to magnetic or solenoid brake apparatuses for continuous casting molds and continuous casting methods using the same.
  • the present invention particularly relates to a magnetic brake apparatus for a continuous casting mold which is suitably applied when a static magnetic field is generated in molten steel in a mold used in continuous casting to control the flow of the molten steel, and to a continuous casting method using the same.
  • molten steel reserved in a tundish is introduced into a continuous casting mold via an sub-entry nozzle connected to the bottom of the tundish, although no drawing is shown.
  • the flow rate of the molten steel discharged from the discharging opening of the sub-entry nozzle is significantly higher than the casting rate.
  • Japanese Patent Laid-Open No. 3-142049 discloses a continuous casting technology for preventing the occurrence of the above-mentioned problem, in which a static magnetic field is applied to the molten steel in the casting mold to brake the flow of the molten steel in the casting mold.
  • Fig. 6A is a cross-sectional view of a main portion of a casting apparatus disclosed in the above-mentioned patent
  • Fig. 6B is an enlarged longitudinal cross-sectional view of a part of Fig. 6A.
  • numeral 101 represents a continuous casting mold comprising a pair of short side walls 101A and a pair of long side walls 101B, its inside being cooled by water.
  • Numeral 102 represents an sub-entry nozzle for supplying the molten steel from a tundish (not shown in the drawing) to the casting mold 101.
  • Numerals 103A and 103B represent iron core bodies for forming a magnetic path.
  • Numerals 104A, 104B, 105A and 105B represent upper and lower magnetic poles (iron cores) which are connected to the iron core bodies 103A and 103B and extend along the width direction of the casting mold 101.
  • Numeral 106 represents a magnetic field controlling means for controlling the intensity of the static magnetic field generated between the magnetic poles.
  • the magnetic field controlling means 106 comprises a bracket 107 fixed to a support, a bracket 108 fixed to the iron core body 103B, a pivot pin connecting the two brackets 107 and 108, and a hydraulic cylinder 110 fixed to the support in which the tip of the rod is engaged with the iron core body.
  • Numeral 102B in the drawings represents a discharging opening of the sub-entry nozzle 102.
  • the present invention has been accomplished for solving these problems, and it is a first object to provide a technology which can readily change the intensity of the magnetic field during casting without expensiveness and limitation.
  • Figs. 1 and 7 are cross-sectional views of a main portion illustrating outlined configurations of embodiments in accordance with the present invention.
  • the magnetic brake apparatus in these embodiments in accordance with the present invention is applied to a continuous casting mold shown by reference numeral 10 in the drawings.
  • the continuous casting mold 10 is substantially the same as that shown in Fig. 6. Cooling water circulates through the interior of the side wall, and molten steel Sm is supplied to the continuous casting mold 10 through a discharging opening (not shown in the drawings) of an sub-entry nozzle 12.
  • the magnetic brake apparatus in these embodiments has a first upper electromagnet 17A comprising an upper iron core 14A which is placed near the rear face of the side wall of the continuous casting mold 10 at the free side (the left side in the drawings) and lies slightly above the discharging opening of the sub-entry nozzle 12, and an upper magnetic coil 16A wound around the electromagnet; and a second upper electromagnet 17B at the fixed side (the right side in the drawings) in the position of the same height comprising an upper iron core 14B and an upper magnetic coil 16B.
  • the first and second upper electromagnets 17A and 17B are oppositely placed with the continuous casting mold 10 intervening therebetween.
  • a first lower electromagnet 21A at the free side comprising a lower iron core 18A and a lower magnetic coil 20A
  • a second lower electromagnet 21B at the fixed side comprising a lower iron core 18B and a lower magnetic coil 20B
  • the upper iron cores 14A and 14B and the lower iron cores 18A and 18B are integrally formed with connecting iron cores 22A and 22B provided therebetween, and are magnetically connected to each other.
  • a current is supplied to these two upper magnetic coils 16A and 16B being constituents of the first and second upper electromagnets through an upper current controlling unit 24A, and independently, a current is supplied to these two lower magnetic coils 20A and 20B being constituents of the first and second lower electromagnets through a lower current controlling unit 24B.
  • These currents are independently controllable.
  • a current of a given ampere is applied to the two upper magnetic coils 16A and 16B, whereas a current of another ampere is applied to the two lower magnetic coils 20A and 20B.
  • the intensities of the static magnetic fields between the upper electromagnets 17A and 17B and between the lower electromagnets 21A and 21B are independently adjustable.
  • a first lower electromagnet 21A at the free side comprising a lower iron core 18A and a lower magnetic coil 20A and a second lower electromagnet 21B at the fixed side comprising a lower iron core 18B and a lower magnetic coil 20B are provided below the upper electromagnets. These two electromagnets are also oppositely placed.
  • the upper iron cores 14A and 14B and the lower iron cores 18A and 18B are integrally formed with connecting iron cores 22A and 22B provided therebetween and are magnetically connected to each other. Different currents are independently supplied to the four magnetic coils 16A, 16B, 20A and 20B through current controlling units 24A to 24D.
  • Fig. 1 when normal static magnetic fields are generated at the upper and lower portions, two current controlling units 24A and 24B independently control the currents for the upper electromagnets 17A and 17B and the lower electromagnets 21A and 21B.
  • the upper magnetic pole at the free side is an S pole
  • the opposing upper magnetic pole at the fixed side is an N pole
  • the lower magnetic pole at the free side is an N pole
  • the lower magnetic pole at the fixed side is an S pole. That is, poles opposing each other across the molten steel and the upper and lower poles on the same side are different from each other.
  • the upper magnetic field in order to prevent capture of mold powder at the meniscus section of the molten steel, the upper magnetic field may be enhanced to moderate the fluctuation of the molten surface.
  • the lower magnetic field in order to prevent penetration of nonmetallic inclusions into the deep interior of the molten steel, the lower magnetic field may be lowered to suppress the downward flow of the molten steel in the casting mold.
  • the upper and lower electromagnets can appropriately control the intensities of the magnetic fields to adequately control the flow of the molten steel depending on the purposes.
  • the quality of the cast slab is improved by casting while adequately controlling the intensities of the static magnetic fields by the upper and lower electromagnets in response to the width and type of the slab and the casting speed using the magnetic brake apparatus of this embodiment.
  • the four current controlling units 24A to 24D independently control the currents for the corresponding electromagnets.
  • poles opposing each other across the molten steel and the upper and lower poles on the same side are different from each other.
  • the most effective results are achieved when the currents of the magnetic coils for the opposing poles are the same.
  • the upper magnetic field may be enhanced to moderate the fluctuation of the molten surface.
  • the lower magnetic field may be lowered to suppress the downward flow of the molten steel in the casting mold.
  • a magnetic field of zero between the upper electromagnets is effective when the flow of the molten steel is required at the meniscus section.
  • Fig. 3 shows the results when the intensity of the lower magnetic field was fixed to 2,400 gauss while the intensity of the upper magnetic field was varied.
  • Fig. 4 shows the results when the intensity of the upper magnetic field was fixed to 2,500 gauss.
  • Fig. 5 is a cross-sectional view, which corresponds to Fig. 1, of an outlined configuration of a magnetic brake apparatus in accordance with the present invention.
  • the magnetic brake apparatus in this embodiment has no connecting iron cores 22A and 22B, shown in Fig. 1, for magnetically connecting the upper and lower iron cores at the free and fixed sides, and thus upper and lower iron cores 14A, 14B, 18A and 18B are magnetically independent of each other.
  • Other configurations are substantially the same as those in the first embodiment.
  • the input current generates a magnetic field with a lower intensity than that in the above-mentioned embodiment. Similar control can, however, be performed and the static magnetic field of either the upper or lower electromagnet can be set to be near zero.
  • the intensity of the magnetic field between the magnetic poles of the upper and lower electromagnets can be readily and inexpensively varied during casting without restriction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP98921807A 1997-05-29 1998-05-26 Elektromagnetische bremsvorrichtung für stranggiesskokille und stranggiessverfahren, bei dem diese verwendet wird Withdrawn EP0922512A4 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP13962497 1997-05-29
JP13962397A JP3253012B2 (ja) 1997-05-29 1997-05-29 連続鋳造用鋳型の電磁ブレーキ装置及びそれを用いた連続鋳造方法
JP13962497A JPH10328791A (ja) 1997-05-29 1997-05-29 連続鋳造用鋳型の電磁ブレーキ装置及びそれを用いた連続鋳造方法
JP13962397 1997-05-29
PCT/JP1998/002297 WO1998053936A1 (fr) 1997-05-29 1998-05-26 Dispositif de freinage electromagnetique pour moule de coulee continue et procede de coulee continue utilisant ce dispositif

Publications (2)

Publication Number Publication Date
EP0922512A1 true EP0922512A1 (de) 1999-06-16
EP0922512A4 EP0922512A4 (de) 2000-08-09

Family

ID=26472371

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98921807A Withdrawn EP0922512A4 (de) 1997-05-29 1998-05-26 Elektromagnetische bremsvorrichtung für stranggiesskokille und stranggiessverfahren, bei dem diese verwendet wird

Country Status (9)

Country Link
US (1) US20020005267A1 (de)
EP (1) EP0922512A4 (de)
KR (1) KR20000029610A (de)
CN (1) CN1234756A (de)
AU (1) AU716170B2 (de)
BR (1) BR9804939A (de)
CA (1) CA2261142A1 (de)
TW (1) TW404866B (de)
WO (1) WO1998053936A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007028501A1 (de) 2005-09-07 2007-03-15 Sms Demag Ag Bauteil für eine stranggiesskokille und verfahren zur herstellung des bauteils
KR101511642B1 (ko) * 2014-01-17 2015-04-13 한양대학교 에리카산학협력단 마그네틱 브레이크
EP3415251A1 (de) * 2017-06-16 2018-12-19 ABB Schweiz AG Elektromechanisches bremssystem und verfahren zur steuerung eines elektromechanischen bremssystems

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1191199A1 (de) * 1999-06-11 2002-03-27 Hitachi, Ltd. Direkteingespritzter motor und verfahren zum betreiben des motors
DE10237188A1 (de) * 2002-08-14 2004-02-26 Sms Demag Ag Elektromagnetische Bremsvorrichtung für in eine Stranggießkokille einströmende Stahlschmelze
KR100954789B1 (ko) * 2002-12-23 2010-04-28 주식회사 포스코 전자기 단공 침지노즐을 이용한 슬래브 연속주조장치 및연속주조방법
KR101129500B1 (ko) * 2004-11-09 2012-03-28 주식회사 포스코 전자기 제동 원리를 이용한 유동 제어 장치 및 그 방법
EP3221070B1 (de) * 2014-11-20 2020-06-03 ABB Schweiz AG Elektromechanisches bremssystem und verfahren zur steuerung des schmelzmetallflusses in einem metallherstellungsverfahren
CN106041009B (zh) * 2016-07-22 2017-10-31 东北大学 一种控制连铸结晶器内钢液流动的立式电磁制动装置
KR102319760B1 (ko) * 2019-01-30 2021-11-02 에이비비 슈바이쯔 아게 연속 주조에서의 유속 제어

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03142049A (ja) * 1989-10-30 1991-06-17 Kawasaki Steel Corp 静磁場を用いた鋼の連続鋳造方法及びその装置
JPH0810917A (ja) * 1994-06-30 1996-01-16 Sumitomo Metal Ind Ltd 溶融金属の連続鋳造方法およびその装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
No further relevant documents disclosed *
See also references of WO9853936A1 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007028501A1 (de) 2005-09-07 2007-03-15 Sms Demag Ag Bauteil für eine stranggiesskokille und verfahren zur herstellung des bauteils
KR101511642B1 (ko) * 2014-01-17 2015-04-13 한양대학교 에리카산학협력단 마그네틱 브레이크
EP3415251A1 (de) * 2017-06-16 2018-12-19 ABB Schweiz AG Elektromechanisches bremssystem und verfahren zur steuerung eines elektromechanischen bremssystems
WO2018228812A1 (en) * 2017-06-16 2018-12-20 Abb Schweiz Ag Electromagnetic brake system and method of controlling an electromagnetic brake system
CN110678277A (zh) * 2017-06-16 2020-01-10 Abb瑞士股份有限公司 电磁制动系统和控制电磁制动系统的方法
US10780490B2 (en) 2017-06-16 2020-09-22 Abb Schweiz Ag Electromagnetic brake system and method of controlling an electromagnetic brake system
CN110678277B (zh) * 2017-06-16 2021-09-21 Abb瑞士股份有限公司 电磁制动系统和控制电磁制动系统的方法

Also Published As

Publication number Publication date
AU7451098A (en) 1998-12-30
BR9804939A (pt) 1999-09-08
AU716170B2 (en) 2000-02-17
KR20000029610A (ko) 2000-05-25
CN1234756A (zh) 1999-11-10
EP0922512A4 (de) 2000-08-09
TW404866B (en) 2000-09-11
WO1998053936A1 (fr) 1998-12-03
US20020005267A1 (en) 2002-01-17
CA2261142A1 (en) 1998-12-03

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