EP0286960B1 - Dispositif de brassage électromagnétique de métal liquide pour ligne de coulée continue - Google Patents

Dispositif de brassage électromagnétique de métal liquide pour ligne de coulée continue Download PDF

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Publication number
EP0286960B1
EP0286960B1 EP88105460A EP88105460A EP0286960B1 EP 0286960 B1 EP0286960 B1 EP 0286960B1 EP 88105460 A EP88105460 A EP 88105460A EP 88105460 A EP88105460 A EP 88105460A EP 0286960 B1 EP0286960 B1 EP 0286960B1
Authority
EP
European Patent Office
Prior art keywords
inductor
axis
carriage
assembly
cast product
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
EP88105460A
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German (de)
English (en)
French (fr)
Other versions
EP0286960A1 (fr
Inventor
Marie Claude Nove
Michel Kouyoumdjian
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.)
Rotelec SA
Original Assignee
GEC Alsthom SA
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 GEC Alsthom SA filed Critical GEC Alsthom SA
Priority to AT88105460T priority Critical patent/ATE67436T1/de
Publication of EP0286960A1 publication Critical patent/EP0286960A1/fr
Application granted granted Critical
Publication of EP0286960B1 publication Critical patent/EP0286960B1/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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/122—Accessories for subsequent treating or working cast stock in situ using magnetic fields

Definitions

  • the present invention relates to a stirring device according to the preamble of claim 1.
  • a stirring device according to the preamble of claim 1.
  • Such a device is known, for example from document US-A-4,256,165.
  • stirring can be obtained by means of a mobile magnetic field, either rotating or sliding, which penetrates the cast product.
  • the rotary brewing is well suited for round, square or slightly rectangular products that is to say close in cross-section to the square shape, which is the the case of billets and blooms.
  • the rotary inductor is that which makes it possible to achieve the best penetration of the magnetic induction in the heart of the cast product and thus to act effectively on the whole mass of the liquid to be stirred.
  • linear mixing is well suited for flat products, such as slabs.
  • Known rotary inductors are always constructed so as to create a magnetic induction passing through the cast product perpendicular to the casting axis, the rotation of the induction around this axis being obtained by supplying the inductor with polyphase currents (generally two-phase in the case of a square and three-phase inductor in the case of a round inductor).
  • polyphase currents generally two-phase in the case of a square and three-phase inductor in the case of a round inductor.
  • the inductor completely surrounds the cast product. More specifically, no rotating field inductor has been produced or proposed publicly which does not completely surround the cast product, and it appeared impossible to economically use a rotating field as soon as the configuration of the casting machine continues. , at the level where one intended to carry out the stirring, did not allow the inductor to completely surround the poured product.
  • a linear inductor was then used which was placed on the most accessible face, or on the only accessible face of the casting line. That is to say that the least efficiency of such an inductor was accepted in the cases where rotary stirring is most effective.
  • a first solution may be to use several partial inductors, mechanically separated but electrically and magnetically coupled and to arrange them symmetrically with respect to the cast product, so that they produce a rotating field like a single rotary inductor of known type.
  • such a solution does not always make it possible to resolve all the difficulties encountered for the implantation of a rotating field inductor on a preexisting continuous casting line.
  • An object of the present invention is to make possible and easy the installation, operation, maintenance and replacement of an inductor device in most cases where the configuration of the continuous casting lines considered seemed to oppose it at the level proposed brewing.
  • the invention is particularly advantageous when it is desired use a rotating field and the configuration of the continuous casting line precludes the installation of a rotating field inductor of known type.
  • the two half-inductors locked in the service position are practically equivalent to a rotary inductor of known type completely surrounding the continuous casting line at the level considered.
  • the handling of the inductor parts, their maintenance and their replacement are particularly easy.
  • an inductor holder mounted on a U-shaped carriage, in the case of two half three-phase bipolar inductors, of generally cylindrical shape with circular base, which are intended to be placed at level S, just below the ingot mold for continuous casting of a billet, in an area where the supporting rollers of the cast metal product are very close to each other and are arranged on the four sides of the product, their assembly constituting a "guide segment".
  • FIGS. 1A, 1B and 1C represent a device according to the invention in schematic and simplified perspective perspective at three successive stages of its implementation.
  • FIG. 2 shows a plan view of the assembly of the inductor, the carriage and the two half-inductors of this device in the open position called withdrawal.
  • FIG. 3 represents a plan view of the same assembly in the closed position, called the service position.
  • Figure 4 is an electrical diagram of the electrical distribution box and the two terminal boxes supported by the carriage.
  • FIG. 5 represents a sectional view of the two half-inductors in service presenting the configuration of the magnetic flux lines at a given instant of the electromagnetic cycle.
  • FIGS. 1A, 1B and 1C provide a good understanding of the principle of the invention.
  • the curved axis of a casting line is represented at A.
  • This axis simultaneously represents the path of the metal product cast which here is a bloom of steel.
  • This bloom is represented only by this axis. It is formed in an ingot mold 1 of continuous casting from which it flows and which is completed downwards by four series of very close rollers, on each face of the bloom; their roughly square section envelope constitutes the "segment" 2. It is at level S of this segment that the electromagnetic stirring of the liquid part of the product is to be carried out.
  • the carcasses 3 and 4 containing the two half-inductors as well as their respective supports 5 and 6 are articulated around the rod 7b of a hinge 7 and rest on a carriage 8, movable in horizontal-tal translation, d-shaped 'U.
  • the laying, around segment 2 at level S, of the two half-inductors is carried out by the mechanical device of the invention in the following manner, passing through the three stages shown in FIGS. 1A, 1B, 1C.
  • the carriage 8 is pushed by mechanical means towards the segment 2 until it occupies the position shown in FIG. 1C (or in phantom in FIG. 1B); the two halves of the articulated device are then closed, and a locking device is operated opposite the hinge 7.
  • the inductor consisting of the two half-inductors is then in the operating position at level S.
  • a locking system 24 gives the assembly of the two mobile parts the necessary rigidity and ensures the closure of the magnetic flux despite the very narrow intervals 25 and 26, visible in Figure 5, which remain between the two half-inductors.
  • the half-inductors completely surround the continuous casting line, that is to say the cast product 27 and the rollers as 28 grouped in segment 2, and produced as well as their bearings in non-magnetic austenitic stainless steel .
  • Each half-inductor here comprises three coils regularly spaced from each other. Each of them is in phase with the coil of the other half-inductor which is diametrically opposite to it. Let B1 and B1b be the coils of phase 1, B2 and B2b the coils of phase 2, B3 and B3b the coils of phase 3 ( Figure 5).
  • FIG. 4 is an electrical diagram of the assembly inside the distribution box 17 and the two terminal boxes 20 and 21.
  • the flexible supply cables are marked Ph. 1, Ph.2, Ph.3, and N, respectively for phases 1, 2, 3 and for the neutral, and are connected to terminals 18 and 18b of the carriage 8.
  • the terminal U1 of the terminal box 21 is supplied by phase 1, and it is connected to the coil B1, the other end of which is connected to the terminal U11 of the box 21.
  • the terminal U11 is connected to the terminal U22 of the other terminal box 20.
  • the terminal U22 is connected to the coil B1b of the other half-inductor, diametrically opposite to B1 .
  • the other end of the coil B1b is connected to the terminal X of the box 20.
  • the two coils B1 and B1b are in phase and in series.
  • phase 2 successively traverses terminal V1 of the terminal box 21, the coil B2 of the half-inductor 4, the terminal V11 of the box 21, the distribution box 17, the terminal B22 of the box 20, the coil B2b of the other half-inductor 3, and the terminal Y of the box 20.
  • B2 and B2b are in phase and in series.
  • phase 3 successively traverses the terminal W1 of the box 20, the coil B3b of the half-inductor 3, the terminal W11 of the terminal box 20, the distribution box 17, the terminal W22 of the box 21, the coil B3 of the half-inductor 4 and the terminal Z of the terminal box 21.
  • the two coils B3 and B3b are in phase and in series.
  • the three terminals X, Y, Z are connected to each other and to terminal 18b of the carriage 8, itself connected to the cable N.
  • the mechanical device according to the invention with its electrical distribution box and its two terminal boxes supported by the carriage, is such that the separation into two half-inductors practically does not harm the electromagnetic efficiency of the assembly thus formed.
  • FIG. 5 is a diagram of the configuration of the magnetic flux at a determined instant of the electromagnetic cycle.
  • the lines of this flow are shown in thin lines. It turns with the evolution of the power supply cycle.
  • the intervals 25 and 26 existing between the two magnetic cores are very narrow and only slightly reduce the efficiency of the magnetic flux.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
EP88105460A 1987-04-13 1988-04-06 Dispositif de brassage électromagnétique de métal liquide pour ligne de coulée continue Expired - Lifetime EP0286960B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88105460T ATE67436T1 (de) 1987-04-13 1988-04-06 Vorrichtung zum elektromagnetischen ruehren von fluessigem metall in einer stranggusslinie.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8705202 1987-04-13
FR8705202A FR2613647B1 (fr) 1987-04-13 1987-04-13 Dispositif de brassage electromagnetique de metal liquide pour ligne de coulee continue

Publications (2)

Publication Number Publication Date
EP0286960A1 EP0286960A1 (fr) 1988-10-19
EP0286960B1 true EP0286960B1 (fr) 1991-09-18

Family

ID=9350055

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88105460A Expired - Lifetime EP0286960B1 (fr) 1987-04-13 1988-04-06 Dispositif de brassage électromagnétique de métal liquide pour ligne de coulée continue

Country Status (7)

Country Link
US (1) US4834168A (enrdf_load_html_response)
EP (1) EP0286960B1 (enrdf_load_html_response)
JP (1) JPS63268544A (enrdf_load_html_response)
AT (1) ATE67436T1 (enrdf_load_html_response)
CA (1) CA1326585C (enrdf_load_html_response)
DE (1) DE3864880D1 (enrdf_load_html_response)
FR (1) FR2613647B1 (enrdf_load_html_response)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06205Y2 (ja) * 1989-03-17 1994-01-05 吉田工業株式会社 水平連続鋳造装置における二次冷却装置
FR2721148B1 (fr) * 1994-06-10 1996-08-02 Rotelec Sa Système de raccordement électrique déconnectable pour ensemble mobile.
DE19853189C1 (de) * 1998-11-18 2000-04-13 Frech Oskar Gmbh & Co Heizeinrichtung für den Hals eines Gießbehälters, insbesondere für eine Warmkammer-Druckgießmaschine
DE10146993A1 (de) * 2001-09-25 2003-04-10 Sms Demag Ag Elektromagnetische Bremsvorrichtung für die Kokille einer Stranggießanlage
FR2856321B1 (fr) * 2003-06-17 2006-05-26 Usinor Installation de coulee continue pour une mise en rotation electro-magnetique du metal liquide en transit dans la busette de coulee
FR2894167A1 (fr) * 2005-12-06 2007-06-08 Usinor Sa Equipement pour la coulee en repartiteur de coulee continue des metaux
US20080164004A1 (en) * 2007-01-08 2008-07-10 Anastasia Kolesnichenko Method and system of electromagnetic stirring for continuous casting of medium and high carbon steels
JP5142281B2 (ja) * 2008-09-05 2013-02-13 新日鐵住金株式会社 鋳型内溶鋼への電磁攪拌装置
GB201318482D0 (en) * 2013-10-18 2013-12-04 Altek Europ Ltd Improvements in and relating to apparatus for stirring and methods of stirring
CN103706772A (zh) * 2013-12-20 2014-04-09 鞍钢股份有限公司 一种减缓小铸坯钢水冲击深度装置及方法
WO2015188573A1 (zh) * 2014-06-10 2015-12-17 东北大学 一种电磁旋流水口连铸方法及装置
AT518460B1 (de) * 2016-03-21 2021-07-15 Primetals Technologies Austria GmbH Einen Metallstrang partiell umgreifende Rührspule
GB201619598D0 (en) * 2016-11-20 2017-01-04 Altek Europe Ltd Improvements in and relating to apparatus for stirring and methods of stirring

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4256165A (en) * 1978-06-23 1981-03-17 Mannesmann Aktiengesellschaft Stirring of molten metal core in a casting as withdrawn from a machine for continuous casting

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE410153B (sv) * 1976-05-21 1979-10-01 Asea Ab Anleggning vid strenggjutning
CH627956A5 (de) * 1977-02-03 1982-02-15 Asea Ab Elektromagnetische mehrphasige ruehrvorrichtung an einer stranggiessmaschine.
FR2485411B1 (fr) * 1980-06-27 1985-11-08 Siderurgie Fse Inst Rech Lingotiere de coulee continue electromagnetique de produits metalliques a section rectangulaire allongee
AT379976B (de) * 1984-04-06 1986-03-25 Voest Alpine Ag Ruehreinrichtung an einer stranggiessanlage
LU85846A1 (fr) * 1985-04-10 1986-11-05 Metz Paul Dispositif de brassage de metal en fusion dans une installation de coulee continue

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4256165A (en) * 1978-06-23 1981-03-17 Mannesmann Aktiengesellschaft Stirring of molten metal core in a casting as withdrawn from a machine for continuous casting

Also Published As

Publication number Publication date
FR2613647B1 (fr) 1990-11-16
EP0286960A1 (fr) 1988-10-19
DE3864880D1 (de) 1991-10-24
JPS63268544A (ja) 1988-11-07
ATE67436T1 (de) 1991-10-15
CA1326585C (fr) 1994-02-01
FR2613647A1 (fr) 1988-10-14
JPH0225698B2 (enrdf_load_html_response) 1990-06-05
US4834168A (en) 1989-05-30

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