WO1998053936A1 - Dispositif de freinage electromagnetique pour moule de coulee continue et procede de coulee continue utilisant ce dispositif - Google Patents

Dispositif de freinage electromagnetique pour moule de coulee continue et procede de coulee continue utilisant ce dispositif Download PDF

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Publication number
WO1998053936A1
WO1998053936A1 PCT/JP1998/002297 JP9802297W WO9853936A1 WO 1998053936 A1 WO1998053936 A1 WO 1998053936A1 JP 9802297 W JP9802297 W JP 9802297W WO 9853936 A1 WO9853936 A1 WO 9853936A1
Authority
WO
WIPO (PCT)
Prior art keywords
electromagnets
mold
magnetic field
pair
brake device
Prior art date
Application number
PCT/JP1998/002297
Other languages
English (en)
Japanese (ja)
Inventor
Susumu Yuhara
Shigenobu Takata
Hisashi Osanai
Original Assignee
Kawasaki Steel Corporation
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 Corporation filed Critical Kawasaki Steel Corporation
Priority to EP98921807A priority Critical patent/EP0922512A4/fr
Priority to AU74510/98A priority patent/AU716170B2/en
Priority to CA002261142A priority patent/CA2261142A1/fr
Priority to BR9804939-9A priority patent/BR9804939A/pt
Publication of WO1998053936A1 publication Critical patent/WO1998053936A1/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
    • B22D11/10—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 is applied to a continuous-form electromagnetic brake device for continuous production and a continuous-production method using the same, particularly when controlling a molten-steel flow by generating a static magnetic field in molten steel in a mold used for continuous production.
  • TECHNICAL FIELD The present invention relates to an electromagnetic brake device of a continuous manufacturing type, and a continuous manufacturing method using the same. Background art
  • molten steel contained in a tundish is guided into a continuous production mold via a submerged nozzle connected to its bottom.
  • the flow velocity of the molten steel spouted from the discharge port of the immersion nozzle is significantly higher than the production speed, so if inclusions or bubbles in the molten steel penetrate deeply and become trapped in the solidified shell, It is inevitable that a product defect is caused by the above.
  • the mold meniscus rises and promotes fluctuations in the molten metal level, which has a significant adverse effect on the quality of the pieces and the production operation.
  • JP-A-3-142049 discloses that a static magnetic field is applied to molten steel in a mold by means of a magnetic pole disposed on the back of the opposite side wall of the mold.
  • a continuous manufacturing technique has been disclosed which applies braking to the flow to prevent the above problem from occurring.
  • FIG. 6 (A) is a cross-sectional view showing a main part of the structure disclosed in the above publication
  • FIG. 6 (B) is a longitudinal cross-sectional view showing a part thereof in an enlarged manner.
  • the reference numeral 101 in the figure denotes a pair of short side walls 101 A and 101 A facing each other, the inside of which is water-cooled.
  • a long side wall (opposing side wall) 101B for continuous fabrication, 102 is an immersion nozzle for supplying molten steel from a tundish (not shown) into the 101, and 103A and 103B form a magnetic path.
  • the core bodies 104A, 104B, 105A and 105B are upper and lower magnetic poles (iron cores) connected to the respective core bodies 103A and 103B and extending along the width of the ⁇ -type 101.
  • Numeral 106 denotes magnetic field adjusting means for adjusting the strength of the static magnetic field generated between the magnetic poles.
  • This adjusting means 106 includes a bracket 107 fixed to a support or the like and a bracket 108 fixed to the iron core body 103B. It comprises a pivot pin 109 connecting these two brackets 107, 108, and a hydraulic cylinder 110 fixed to the support and having a rod end engaged with the iron core body.
  • Reference numeral 102B in the figure is a discharge port of the immersion nozzle 102.
  • the technique disclosed in the above publication requires a hydraulic cylinder 110 and a pivot pin 109 and also requires a position detection sensor for adjusting the distance more accurately.
  • installing a facility for adjusting the strength of the space requires a large space and a large number of facilities.
  • the above publication also discloses a method of adding a non-magnetic material to a part of the iron core to adjust a magnetic field. The strength of the magnetic field cannot be arbitrarily changed during manufacturing according to the steel type, width, and manufacturing speed of the steel, and it takes time to replace the non-magnetic material. There is a problem.
  • the present invention has been made to solve such a conventional problem, and it is an object of the present invention to provide a technique capable of easily and inexpensively changing the strength of the magnetic field of the upper and lower magnetic poles and arbitrarily changing it during manufacturing. This is the first issue.
  • a second object of the present invention is to make it possible to manufacture a high-quality manufactured product by solving the first object.
  • FIG. 1 is a sectional view of a main part showing a schematic configuration of an embodiment according to the present invention.
  • FIG. 2 is an explanatory view showing combinations of magnetic field poles.
  • FIG. 3 is a diagram showing the quality of a piece obtained in the example.
  • FIG. 4 is another diagram showing the quality of the piece obtained in the example.
  • FIG. 5 is a sectional view of a main part showing a schematic configuration of another embodiment according to the present invention.
  • FIG. 6 is a cross-sectional view schematically showing a conventional ⁇ type.
  • FIG. 7 is a cross-sectional view of a main part showing a schematic configuration of another embodiment according to the present invention.
  • FIG. 8 is another explanatory diagram showing a combination of magnetic field poles.
  • FIG. 9 is another explanatory diagram showing a combination of magnetic field poles.
  • FIGS. 1 and 7 are schematic cross-sectional views schematically showing main parts of a continuous-form electromagnetic brake device according to an embodiment of the present invention.
  • the electromagnetic brake device according to the present embodiment is applied to a continuous manufacturing mold indicated by reference numeral 10 in the figure.
  • This mold 10 is substantially the same as that shown in FIG. 6 described above, and cooling water is circulated inside the side wall.
  • Molten steel Sm is supplied from a discharge port (not shown) of the nozzle 12.
  • the electromagnetic brake device according to the present embodiment includes a rear surface of the side wall of the ⁇ type 10 on the free side (left side in the figure) located slightly above the discharge outlet of the immersion nozzle 12.
  • the first upper electromagnet 17A consisting of an upper core A installed close to the upper core and an upper electromagnetic coil 16A wound around it, and an upper core 14B on the fixed side (right side in the figure) at the same height and an upper electromagnetic It has a second upper magnet 17B composed of a coil 16B, and a pair of the first and second upper electromagnets 17A and 17B are arranged to face each other with the ⁇ type 10 therebetween.
  • a first lower electromagnet 21A composed of a free lower core 18A and a lower electromagnetic coil 20A
  • a second lower electromagnet 21B composed of a fixed lower core 18B and a lower electromagnetic coil 20B. It has a lower electromagnet ⁇ , and the pair of electromagnets 21A and 21B are similarly arranged to face each other.
  • the upper iron cores 14A and 14B and the lower iron cores 18A and 18B are integrally formed via connecting cores ⁇ and 22B, respectively, and are magnetically connected.
  • the two upper electromagnetic coils 16A and 16B constituting the first and second upper electromagnets respectively include the upper current controller 24A and the two lower electromagnetic coils constituting the first and second lower electromagnets.
  • the current is individually supplied to the electromagnetic coils 20A and 20B from the lower current controller 24B, and each current value can be controlled independently.
  • the same current of an arbitrary magnitude is supplied to the two upper electromagnetic coils 16A and 16B, and the same current is similarly supplied to the two lower electromagnetic coils 20A and 20B. Therefore, the strength of the static magnetic field between the pair of upper electromagnets, and 17B and the strength of the static magnetic field between the pair of lower electromagnets 21A and 21B can be arbitrarily adjusted.
  • a first lower electromagnet 21A including a free lower core 18A and a lower electromagnetic coil 20A
  • a first lower electromagnet 21B including a fixed lower core 18B and a lower electromagnetic coil 20B. It has two lower electromagnets 21 B, and the pair of electromagnets is similarly arranged to face each other.
  • the upper iron cores 14A and 14B and the lower iron cores 18A and 18B are integrally formed via the connecting cores 22A and 22B, respectively, and are magnetically connected. Currents are individually supplied to the 16A, 16B, 20mm, and 20mm from the current controllers 24mm to 24D, and the current values can be controlled independently.
  • the currents to the upper electromagnets , and 17B and the lower electromagnets 21A and 21B are independently controlled by the two control devices 24A and 24B.
  • the upper magnetic pole on the free side is the S pole
  • the opposite upper magnetic pole on the fixed side is the N pole
  • the lower magnetic pole on the side is the N pole
  • the lower magnetic pole on the fixed side is the S pole.
  • the counter electrode across the molten steel and the upper and lower poles on the same side have different polarities.
  • the upper magnetic field is strengthened in order to calm the fluctuation of the molten metal level, and non-metallic intervention in the deep portion of the molten steel is performed.
  • the lower magnetic field can be strengthened to apply braking to the downward flow of molten steel in the mold.
  • the electromagnetic brake device of the present embodiment by appropriately controlling the strength of the static magnetic field by the upper and lower electromagnets according to the width of the piece, the type of steel, and the manufacturing speed, ⁇ Improvement of piece quality.
  • the current to each electromagnet is independently controlled by each of the four control devices 24A to 24D.
  • FIG. 5 the relationship between the magnetic poles of the upper and lower electromagnets is shown.
  • the counter electrode sandwiching the molten steel and the upper and lower poles on the same side have different polarities. In this case, it is most effective to make the current values of the opposite magnetic coils the same. It is efficient.
  • the upper magnetic field is strengthened to suppress fluctuations in the molten metal level, and non-metallic inclusions are prevented from penetrating deep into the molten steel.
  • the lower magnetic field can be strengthened to apply braking to the downward flow of molten steel in the mold.
  • the upper and lower iron cores are connected by the connecting cores and connected magnetically, even if the current value to the coil of the electromagnet is set to zero. It was impossible.
  • the control devices 24A to 24D reverse the direction of one of the currents of the electromagnetic coils of the opposing electrodes, and make the opposing magnetic poles the same as shown in FIG. 8 and FIG. Thereby, the strength of the magnetic field can be eliminated.
  • a continuous structure was performed under the following conditions to produce a structure piece of low-carbon A1 killed steel.
  • the surface quality and internal quality were investigated.
  • Fig. 3 shows the results when the strength of the upper magnetic field was changed while the lower magnetic field strength was fixed at 2500 Gauss
  • Fig. 4 shows the results when the upper magnetic field was fixed at 2500 Gauss. Show. [ ⁇ Construction conditions]
  • the molten steel flow in the mold ⁇ can be arbitrarily controlled, so that the injected molten steel jet causes the non-metallic inclusions to be deeply caught in the molten steel pool or the meniscus portion. Since it is possible to prevent mold powder from being caught in the molten steel due to fluctuations in the molten metal level, high quality chips can be manufactured with high efficiency.
  • FIG. 5 is a cross-sectional view corresponding to FIG. 1 showing a schematic configuration of the electromagnetic brake device of the present embodiment.
  • the electromagnetic brake device according to the present embodiment does not have the connecting cores 22A and 22B for magnetically connecting the upper and lower iron cores shown in FIG. 1 on both the free side and the fixed side. It is substantially the same as the electromagnetic brake device of the first embodiment except that the iron cores 14A, 14B, 18A, 18B are all magnetically independent.
  • the intensity of the generated magnetic field is smaller with respect to the applied current than in the case of the above-described embodiment.
  • the control can be performed, and the static magnetic field of one of the upper and lower electromagnets can be made close to zero.
  • the strength of the magnetic field between the magnetic poles of the upper and lower electromagnets can be easily, inexpensively, and arbitrarily changed during fabrication.

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

Abstract

Cette invention se rapporte à un dispositif de freinage électromagnétique pour moule de coulée continue, qui est placé à proximité des faces arrière des parois latérales extérieures du moule (10). On prévoit une paire d'aimants consistiuée par des premier et second électro-aimants supérieurs (17A et 17B) disposés à l'opposé l'un de l'autre des deux côtés d'un moule de coulée continue (10), ainsi qu'une paire d'électro-aimants inférieurs (21A et 21B) disposés à l'opposé l'un de l'autre sous les électro-aimants (17A et 17B) en vue de freiner le flux de fonte fourni au moule (10) en utilisant le champ magnétique statique produit entre chaque paire d'électro-aimants. Ce dispositif est pourvu d'un contrôleur qui commande indépendamment les courants électriques fournis aux bobines électromagnétiques (16A et 16B) constituant les premier et second électro-aimants supérieurs (17A et 17B) et aux bobines électromagnétiques (20A et 20B) constituant les premier et second électro-aimants inférieurs (21A et 21B). Ainsi les intensités des champs magnétiques formés respectivement entre les pôles magnétiques des électro-aimants supérieurs et inférieurs peuvent être amenées à varier facilement et à moindre coût et, en outre, de façon arbitraire pendant l'opération de coulée.
PCT/JP1998/002297 1997-05-29 1998-05-26 Dispositif de freinage electromagnetique pour moule de coulee continue et procede de coulee continue utilisant ce dispositif WO1998053936A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP98921807A EP0922512A4 (fr) 1997-05-29 1998-05-26 Dispositif de freinage electromagnetique pour moule de coulee continue et procede de coulee continue utilisant ce dispositif
AU74510/98A AU716170B2 (en) 1997-05-29 1998-05-26 Magnetic brake apparatus for continuous casting mold and continuous casting method using the same
CA002261142A CA2261142A1 (fr) 1997-05-29 1998-05-26 Dispositif de freinage electromagnetique pour moule de coulee continue et procede de coulee continue utilisant ce dispositif
BR9804939-9A BR9804939A (pt) 1997-05-29 1998-05-26 Aparelho de refreamento magnético para molde de fundição continua e método de fundição continua que usa o mesmo.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
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
JP9/139623 1997-05-29
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
JP9/139624 1997-05-29

Publications (1)

Publication Number Publication Date
WO1998053936A1 true WO1998053936A1 (fr) 1998-12-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
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

Country Status (9)

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

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000077359A1 (fr) * 1999-06-11 2000-12-21 Hitachi, Ltd. Moteur a injection directe et procede de combustion destine audit moteur
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
DE102005042370A1 (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
WO2016078718A1 (fr) * 2014-11-20 2016-05-26 Abb Technology Ltd Système de frein électromagnétique et procédé de réglage du débit de métal en fusion dans un processus de fabrication de métal
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
EP3415251A1 (fr) * 2017-06-16 2018-12-19 ABB Schweiz AG Système de frein électromagnétique et procédé de commande d'un système de frein électromagnétique
CN113365758B (zh) * 2019-01-30 2023-04-21 Abb瑞士股份有限公司 用于控制金属连铸结晶器中的流速的装置和相关系统

Citations (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

Patent Citations (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 (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0922512A4 *

Also Published As

Publication number Publication date
EP0922512A4 (fr) 2000-08-09
EP0922512A1 (fr) 1999-06-16
CN1234756A (zh) 1999-11-10
KR20000029610A (ko) 2000-05-25
AU716170B2 (en) 2000-02-17
US20020005267A1 (en) 2002-01-17
BR9804939A (pt) 1999-09-08
AU7451098A (en) 1998-12-30
CA2261142A1 (fr) 1998-12-03
TW404866B (en) 2000-09-11

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