EP0080326A1 - Einrichtung für das Stranggiessen von Stahl - Google Patents

Einrichtung für das Stranggiessen von Stahl Download PDF

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Publication number
EP0080326A1
EP0080326A1 EP82306122A EP82306122A EP0080326A1 EP 0080326 A1 EP0080326 A1 EP 0080326A1 EP 82306122 A EP82306122 A EP 82306122A EP 82306122 A EP82306122 A EP 82306122A EP 0080326 A1 EP0080326 A1 EP 0080326A1
Authority
EP
European Patent Office
Prior art keywords
coils
strand
connections
steel
continuous casting
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Withdrawn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
EP82306122A
Other languages
English (en)
French (fr)
Inventor
Christopher Mortimer Swainston
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.)
British Steel Corp
Original Assignee
British 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
Application filed by British Steel Corp filed Critical British Steel Corp
Publication of EP0080326A1 publication Critical patent/EP0080326A1/de
Withdrawn legal-status Critical Current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

Definitions

  • This invention relates to the continuous casting of steel, and more particularly to electromagnetic stirring of the steel while still-molten and/or as it solidifies after pouring into a mould.
  • Helical stirring can also, for example, have advantage in the casting of alloys with long solidification ranges, for example high carbon steels typically with carbon content ranging from 0.5 to 1.5%, where it would arrest the collumnar crystal growth giving a central equiaxed structure with reduced mini-ingotism, bridging, central segregation of alloying elements and allow for a higher casting temperature without its pronounced deleterious effects.
  • apparatus for continuously downwardly casting steel including a continuous casting mould and electromagnetic stirring means located about the metal strand path, the electromagnetic stirring means comprising a set of electromagnetic coils disposed about the strand, the set of coils being connected to two separate power sources by means of two separate sets of connections such that one power supply and set of connections activates the set of coils to provide a rotational field force upon the strand, and the other power supply and set of connections activates the set of coils to provide an axial field force upon the strand.
  • the electromagnetic stirring means may be arranged about the strand within and/or below the casting mould.
  • the present invention overcomes potential disadvantages of previous proposals for helical stirring which suggested, for example, a skewed arrangement of coils which could be in some circumstances difficult to accommodate about a continuous casting mould and could in some circumstances give only a limited helix angle variation.
  • a further previous proposal was for fixed inductors about a continuous casting mould. Although in this arrangement the disposition of the.inductors would not usually create any serious problem, the helix angles produced were found not always to be conducive to the best metallurgical effects upon the cast material.
  • the two power sources may be arranged with advantage to operate at different frequencies.
  • a continuous casting mould 1 is provided in the usual way with a copper mould wall 2 and is surrounded by a cooling water annulus 3 and an outer jacket wall 4 of austenitic steel.
  • a plurality of coils 5 are located along each side of the mould and are mounted on main iron circuits 6 which are linked with secondary iron circuits 7, necessary to allow for rotating magnetic flux.
  • mould stirring could be achieved with a similar arrangement of coils provided these were suitably protected from the hot strand by means of a larger clearance therefrom and appropriate heat shield in place of the mould wall 2.
  • each side of the mould is provided with a linear magnetic inductor 8 comprising the coils 5 and iron circuits 6 and 7 designed to produce an upward magnetic field.
  • Each inductor is fed from a polyphase electrical supply 9, typically at low frequency.
  • the inductor coils are connected in star, adjacent inductors being connected anti-phase, thus producing within the mould a magnetic field with strong radial and tangential components. Adjustment of the frequency and current produced by the axial supply allows the axial body forces in the material in the mould to be adjusted, resulting in axial movement of the molten material.
  • a further and separate polyphase supply 10 is connected to the star points 11 of the inductors 8 in correct phase rotation.
  • the supply will induce a rotating field system about the vertical axis of the mould. Adjustment of the frequency and current produced by the rotary supply allows the rotational body forces in the material in the mould to be adjusted resulting in rotational movement of the molten material.
  • differing frequencies for the rotational suppy and the axial supply are provided so that the RM5 value of current in each coil is approximately the same. Should the frequency of both the rotational supply and the axial supply be the same, the RMS value of current in each coil will in use vary so that there is risk of overheating the coils and at the same time under-utilising the coils.
  • the calculated RMS Flux Density at the mould surface is, with respect to axial mode stirring, 0.19 Tesla with a travelling wave velocity of 3m/sec and an electrical input of 30 KVA; and is with respect to rotary mode stirring 0.09 Tesla with a frequency of 5 Hertz and an electrical input of 20 KVA.
  • the mould has a copper inner jacket 8 mm thick, an austenitic steel outer jacket 8 mm thick, and a 4 mm water gap.
  • the stirred length along the strand is approximately 650 mm and the mould section 150 mm square.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP82306122A 1981-11-20 1982-11-17 Einrichtung für das Stranggiessen von Stahl Withdrawn EP0080326A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8135013 1981-11-20
GB8135013 1981-11-20

Publications (1)

Publication Number Publication Date
EP0080326A1 true EP0080326A1 (de) 1983-06-01

Family

ID=10526031

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82306122A Withdrawn EP0080326A1 (de) 1981-11-20 1982-11-17 Einrichtung für das Stranggiessen von Stahl

Country Status (3)

Country Link
EP (1) EP0080326A1 (de)
JP (1) JPS58135755A (de)
GB (1) GB2109724A (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2632549A1 (fr) * 1988-06-08 1989-12-15 Voest Alpine Ind Anlagen Lingotiere pour la coulee continue de billettes ou de blooms
WO1994015739A1 (en) * 1993-01-15 1994-07-21 J. Mulcahy Enterprises Inc. A.c. magnetic stirring modifier for continuous casting of metals
WO1996018469A1 (en) * 1994-12-15 1996-06-20 Asea Brown Boveri Ab Method and device for casting in a mould
US5699850A (en) * 1993-01-15 1997-12-23 J. Mulcahy Enterprises Inc. Method and apparatus for control of stirring in continuous casting of metals
WO2004058433A2 (en) * 2002-12-16 2004-07-15 Dardik Irving I Systems and methods of electromagnetic influence on electroconducting continuum
CN100421838C (zh) * 2002-12-16 2008-10-01 欧文·I·达迪克 控制类铁金属和有色金属锭和铸锭的晶体结构的方法
CN102574202A (zh) * 2009-08-31 2012-07-11 Abb公司 钢坯和钢锭连铸的电磁搅拌器装置
CN103182495A (zh) * 2011-12-29 2013-07-03 宝山钢铁股份有限公司 一种多功能电磁搅拌器
ITUB20159776A1 (it) * 2015-12-30 2017-06-30 Ergolines Lab S R L Impianto di produzione di barre metalliche, macchina di colata, processo di colata e metodo di controllo di dispositivi elettromagnetici di agitazione di metallo fuso
CN107116191A (zh) * 2017-05-15 2017-09-01 东北大学 一种复合式螺旋电磁搅拌器
CN112074359A (zh) * 2018-05-08 2020-12-11 日本制铁株式会社 电磁搅拌装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58215254A (ja) * 1982-06-08 1983-12-14 Kawasaki Steel Corp 連続鋳造用鋳型の下方に配設される電磁攪拌装置
GB2184674A (en) * 1985-12-19 1987-07-01 Ti Stirring of molten metal during continuous casting
US5746268A (en) * 1994-03-07 1998-05-05 Nippon Steel Corporation Continuous casting method and apparatus
DE19843354C1 (de) * 1998-09-22 2000-03-09 Ald Vacuum Techn Gmbh Vorrichtung zum gerichteten Erstarren einer in eine Formschale gegossenen Metallschmelze sowie ein Verfahren hierzu
US6402367B1 (en) * 2000-06-01 2002-06-11 Aemp Corporation Method and apparatus for magnetically stirring a thixotropic metal slurry

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995678A (en) * 1976-02-20 1976-12-07 Republic Steel Corporation Induction stirring in continuous casting
DE7801279U1 (de) * 1978-01-18 1978-12-21 Aeg-Elotherm Gmbh, 5630 Remscheid Vorrichtung zum elektromagnetischen ruehren des abkuehlenden metalls in einem gusstrang
DE2903225A1 (de) * 1978-02-01 1979-08-02 Concast Ag Stranggiesskokille
WO1980001999A1 (en) * 1979-03-21 1980-10-02 British Steel Corp Continuous casting of steel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995678A (en) * 1976-02-20 1976-12-07 Republic Steel Corporation Induction stirring in continuous casting
DE7801279U1 (de) * 1978-01-18 1978-12-21 Aeg-Elotherm Gmbh, 5630 Remscheid Vorrichtung zum elektromagnetischen ruehren des abkuehlenden metalls in einem gusstrang
DE2903225A1 (de) * 1978-02-01 1979-08-02 Concast Ag Stranggiesskokille
WO1980001999A1 (en) * 1979-03-21 1980-10-02 British Steel Corp Continuous casting of steel

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2632549A1 (fr) * 1988-06-08 1989-12-15 Voest Alpine Ind Anlagen Lingotiere pour la coulee continue de billettes ou de blooms
WO1994015739A1 (en) * 1993-01-15 1994-07-21 J. Mulcahy Enterprises Inc. A.c. magnetic stirring modifier for continuous casting of metals
US5699850A (en) * 1993-01-15 1997-12-23 J. Mulcahy Enterprises Inc. Method and apparatus for control of stirring in continuous casting of metals
WO1996018469A1 (en) * 1994-12-15 1996-06-20 Asea Brown Boveri Ab Method and device for casting in a mould
CN1083308C (zh) * 1994-12-15 2002-04-24 瑞典通用电器勃朗勃威力公司 用于铸型浇注的方法和装置
WO2004058433A2 (en) * 2002-12-16 2004-07-15 Dardik Irving I Systems and methods of electromagnetic influence on electroconducting continuum
WO2004058433A3 (en) * 2002-12-16 2005-05-19 Irving I Dardik Systems and methods of electromagnetic influence on electroconducting continuum
US7350559B2 (en) 2002-12-16 2008-04-01 Energetics Technologies, Llc Systems and methods of electromagnetic influence on electroconducting continuum
US7381238B2 (en) 2002-12-16 2008-06-03 Energetics Technologies, L.L.C. System and method of electromagnetic influence on electroconducting continuum
CN100421838C (zh) * 2002-12-16 2008-10-01 欧文·I·达迪克 控制类铁金属和有色金属锭和铸锭的晶体结构的方法
US7449143B2 (en) 2002-12-16 2008-11-11 Energetics Technologies, L.L.C. Systems and methods of electromagnetic influence on electroconducting continuum
US7675959B2 (en) 2002-12-16 2010-03-09 Energetics Technologies, Llc Systems and methods of electromagnetic influence on electroconducting continuum
CN102574202A (zh) * 2009-08-31 2012-07-11 Abb公司 钢坯和钢锭连铸的电磁搅拌器装置
CN103182495A (zh) * 2011-12-29 2013-07-03 宝山钢铁股份有限公司 一种多功能电磁搅拌器
CN103182495B (zh) * 2011-12-29 2015-04-22 宝山钢铁股份有限公司 一种多功能电磁搅拌器
KR20180101431A (ko) * 2015-12-30 2018-09-12 얼고라인스 랩 에스알엘 금속 봉 생산 플랜트, 주조기, 주조 공정 및 용융 금속의 전자기 교반 장치의 제어 방법
WO2017114587A1 (en) * 2015-12-30 2017-07-06 Ergolines Lab S.R.L. Production plant of metal rods, casting machine, casting process and control method of electromagnetic stirrer devices of molten metal
CN108430668A (zh) * 2015-12-30 2018-08-21 麦角灵实验室公司 金属杆的生产设备、铸造机、熔融金属的电磁搅拌装置的铸造工艺和控制方法
ITUB20159776A1 (it) * 2015-12-30 2017-06-30 Ergolines Lab S R L Impianto di produzione di barre metalliche, macchina di colata, processo di colata e metodo di controllo di dispositivi elettromagnetici di agitazione di metallo fuso
EP3626366A1 (de) 2015-12-30 2020-03-25 Ergolines Lab S.r.l. Produktionsanlage von metallmaterialien, giessmaschine, giessverfahren und steuerungsverfahren für elektromagnetische rührvorrichtungen von metallschmelze und rührsystem
RU2723495C2 (ru) * 2015-12-30 2020-06-11 Эрголайнз Лэб С.Р.Л. Установка для производства металлических стержней, литейная машина, процесс литья и способ управления электромагнитными устройствами перемешивания расплавленного металла
US10792730B2 (en) 2015-12-30 2020-10-06 Ergolines Lab S.R.L. Production plant of metal rods, casting machine, casting process and control method of electromagnetic stirrer devices of molten metal
EP3845328A1 (de) 2015-12-30 2021-07-07 Ergolines Lab S.r.l. Produktionsanlage für metallstäbe, giessmaschine und giessverfahren
CN107116191A (zh) * 2017-05-15 2017-09-01 东北大学 一种复合式螺旋电磁搅拌器
CN107116191B (zh) * 2017-05-15 2020-09-29 东北大学 一种复合式螺旋电磁搅拌器
CN112074359A (zh) * 2018-05-08 2020-12-11 日本制铁株式会社 电磁搅拌装置

Also Published As

Publication number Publication date
GB2109724A (en) 1983-06-08
JPS58135755A (ja) 1983-08-12

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Inventor name: SWAINSTON, CHRISTOPHER MORTIMER