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EP3405301B1 - Verfahren für rotierendes elektromagnetisches rühren einer metallschmelze beim giessen eines produkts mit grossem querschnitt und vorrichtung zur durchführung des verfahrens - Google Patents

Verfahren für rotierendes elektromagnetisches rühren einer metallschmelze beim giessen eines produkts mit grossem querschnitt und vorrichtung zur durchführung des verfahrens Download PDF

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Publication number
EP3405301B1
EP3405301B1 EP16705807.2A EP16705807A EP3405301B1 EP 3405301 B1 EP3405301 B1 EP 3405301B1 EP 16705807 A EP16705807 A EP 16705807A EP 3405301 B1 EP3405301 B1 EP 3405301B1
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Prior art keywords
inductors
phase
sliding
magnetic
casting
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English (en)
French (fr)
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EP3405301A1 (de
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Siebo Kunstreich
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Rotelec SA
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Rotelec SA
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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

Definitions

  • the present invention relates to the casting of metals, steel in particular. It is particularly aimed at the casting of metal products with a large square, rectangular or round cross section such as thick oars and large square or round blooms. More precisely, it relates to the electromagnetic stirring which generates an axial rotational movement of the molten metal during casting.
  • One of the main uses of electromagnetic stirring, and in which the present invention is part, consists in creating rotary movements of the molten metal, either in the form of a circulation loop rotating around the casting axis, therefore in the plane of the cross section of the cast product (BF 7520225), or in a vertical plane parallel to the large faces of the cast product, in the form of multiple loops with axes of rotation perpendicular to the casting axis ( EP 0550785 , EP 0151648 ).
  • these movements are generated by moving magnetic fields produced by polyphase static electromagnetic inductors mounted on the casting machine around and in the immediate vicinity of the cast product, already at the level of the ingot mold, or below, in the stages. secondary or final cooling of the machine.
  • an inductor of this type is essentially constituted by a succession of electric coils wound on a ferromagnetic body, coils which produce magnetic poles when they are traversed by an electric current supplied by a two-phase or three-phase power supply.
  • the inductor windings are electrically connected to the phases of the power supply to form a system with a pair of magnetic poles of opposite signs per phase (two-phase or three-phase bipolar motor). A mobile magnetic field is thus generated, which moves along the inductor.
  • this mobile field then generates a volume force (Lorentz force) which sets in motion (we say “which stirs”) the molten metal according to the well-known principles of the rotary or linear asynchronous induction motor.
  • the electromagnetic stirring equipment used is conventionally constituted by an annular inductor (circular fig. la or square fig. 1b ) that surrounds the cast product.
  • This inductor produces a magnetic field which passes right through the cast product perpendicular to the casting axis and which rotates around this axis. An axial rotational movement of the molten metal is thus created in the manner of an asynchronous electric motor whose rotor is the molten metal.
  • the term “pair of inductors” should be understood to mean a pair of electrically matched linear inductors, that is to say supplied by synchronous polyphase electric currents.
  • a linear inductor with a sliding field always operates in tangential magnetic flux (we also say “longitudinal”). This means that it generates a thrust in the molten metal which decreases exponentially when we move away from it.
  • the metal in stirred fusion forms a double circulation loop known as the “butterfly wing loop”
  • an equipment with a pair of linear inductors is mounted at the level of the mold at the rate of one inductor per face.
  • Each inductor operates in tangential magnetic flux with opposite sliding directions of the two magnetic fields. This results in individual thrusts in the opposite direction on the molten metal in the immediate vicinity of the large walls of the mold, therefore a zero thrust in the middle zone of the slab, which leads to creating an axial rotary movement of the molten metal in its entire straight section.
  • axial is understood to mean “rotation around the casting axis or parallel to it. This meaning will be valid for the rest of the description.
  • FIG. 3b Another known document, illustrated by the figure 3b , shows a pair of linear inductors used in flux crossing in the same direction of sliding of the magnetic fields, which generates a substantially constant thrust throughout the thickness of the cast slab.
  • an ingot mold as shown for example in the document EP 0550785 (NKK), one more commonly uses a brewing equipment formed by a battery of two pairs of polyphase linear inductors, that is to say four identical inductors.
  • the inductors are mounted on the two large walls of the mold, with two inductors aligned per wall and placed on either side of the casting nozzle.
  • FR2893868 discloses a method of adjusting the electromagnetic stirring mode of the liquid metal to the height of a continuous casting mold, and corresponding equipment, in which method the inductors are mounted to slide vertically and pass, by translation, from a low functional position acting at the outlet openings of a nozzle, at a high functional action position acting at the level of the meniscus of the liquid metal in the ingot mold.
  • the connection of the inductors to the power supply is changed in order to reverse the direction of sliding of the magnetic field of only one of the two inductors of the same pair as well as that, among the two inductors of another pair, which is its symmetrical with respect to the casting axis.
  • This document does not however disclose that the opposite poles of the inductor are connected to the same electrical phase and are maintained at the same polarity.
  • the first object of the invention is a method of rotary electromagnetic stirring of the molten metal, during the casting of metal products in XXL format, of round, square or cross section. rectangular, in which a stirring equipment comprising linear polyphase inductors with a sliding magnetic field is used, and the molten metal is stirred in the form of a plurality of adjacent axially rotating circulation loops, distributed around the surrounding of the casting axis and occupying at best the entire cross section of the cast product.
  • the method is characterized in that said stirring is carried out by placing said polyphase linear inductors with a sliding magnetic field around the casting axis to form an air gap, in that the magnetic fields sliding in this air gap so that they slide in opposite directions on any two neighboring inductors, and in that the pairs of poles connected to the same electrical phase and located one opposite the other are adjusted to the same magnetic polarity on two separate paired inductors.
  • Another subject of the invention is equipment for electromagnetic stirring of metal products in XXL format. of round, square or rectangular section, equipment for carrying out the method according to claim 1 or 2 and comprising at least one pair of linear inductors with sliding magnetic field mounted symmetrically, facing each other with respect to a plane of symmetry (P) of the cast product, around the casting axis so as to define an air gap through which the product passes cast, at least one polyphase power supply provided with electrical connection means with said inductors, and means for adjusting the direction of sliding of the magnetic fields on each inductor, equipment characterized in that said connection means impose the same polarity on each pair of magnetic poles belonging to the same phase and placed symmetrically with respect to said plane (P) facing each other on two paired inductors.
  • the stirring equipment comprises at least two pairs of linear inductors with a sliding magnetic field, forming a set of at least four inductors arranged around the casting axis so as to define a air gap in which the cast product passes, equipment characterized in that said means for adjusting the direction of sliding of the magnetic fields are configured so that the magnetic fields of any two neighboring inductors slide in opposite directions.
  • the magnetic field will rotate according to the U. V sequencing for a two-phase inductor ( fig. 1b ) and U, V, W for a three-phase inductor ( fig. 1a ), i.e. clockwise.
  • U, V. W sequencing that is to say from left to right in the figure.
  • it will slide from right to left, as shown in the figure 2b , if the sequencing has been changed by permutation of two phases between them (V and W in the example considered) without changing the North or South magnetic polarity of each pole.
  • the inductors are used in magnetic coupling with through-flow, and this, both in circular configuration (rotating field applied to blooms of round or square section) as in linear configuration by pair of inductors (sliding fields applied to rectangular products such as slabs). This means that the poles of the same phase which face each other on two inductors facing each other are of opposite polarities.
  • the letters U, V and W represent the three electrical phases of the three-phase power supply phase-shifted by 120 °. They also designate, consequently, the phase windings on the inductors connected to this power supply, and the additional letters U *, V *, W * designate the phase windings on the inductors wound in the opposite direction of the windings. U, V, W so that the electric current flows in it in an opposite direction.
  • FIG. La is the functional diagram of a known three-phase annular inductor with a rotating magnetic field.
  • This type of inductor with a pair of poles per phase, annular in shape with a circular base, is usually used for the continuous casting of long products in round format (blooms, billets), whether at the level of the mold or, below. , in the area of secondary cooling of the casting machine.
  • U, V and W denote the three phases of a balanced three-phase power supply.
  • the maximum intensity of electric current passes, with a regular speed which depends on its frequency of the current, from phase U to phase V then to phase W, and so on.
  • the pairs of paired magnetic poles of each phase are excited by windings wound in opposite directions so as to present magnetic polarities of opposite signs (N or S).
  • N or S magnetic polarities of opposite signs
  • the figure 1b illustrates the functional diagram of an inductor with two pairs of poles per phase, but two-phase this time and of annular shape with square base for the casting of long products of square format. If necessary, we will know how to use it, in the same way as with the figure 1a , to find on such a circle of phases the attributes specific to a two-phase system. We will easily realize that, in this case, we will be able to reverse the direction of rotation of the magnetic field indifferently, by switching the phases U and V (ie putting V in advance of 90 ° on U), or by reversing the direction of the current in the windings of one phase.
  • the figures 3 illustrate what happens when a matched identical inductor 3 is brought closer to inductor 1 to place them in parallel, on either side of a plane of symmetry P which is the main plane of symmetry of the cast rectangular slab 2.
  • figure 3b is that of the usual classical configuration: the magnetic poles opposite each side of the plane of symmetry P are at the same phase, but of opposite polarities. Everything then takes place as if such a pair of inductors 1, 3 produced a "piston" magnetic field sliding from their left end to their right end (arrow v or v '), in a way like the bars of a mobile ladder whose fixed slides are the inductors themselves.
  • the brewing equipment of the figure 3b generates a sliding induction flux of the "through” type. It results in particular that the Lorenz thrust produced on the molten metal is, this time, of almost constant intensity through the entire thickness of the cast slab, as shown by the associated vignette at the bottom of the figure.
  • figure 3a is also known, although less common than that seen above: the magnetic poles opposite each side of the main plane of symmetry P of the slab 2 are again of reverse magnetic polarities, but the phase correspondence on the two inductors 1 and 3 opposite is random, so it is no longer respected. Despite appearances, the two magnetic fields slide in the same direction (see the comparative definition according to the invention above).
  • the magnetic fluxes produced are of the "tangential" type and the Lorentz thrusts, which are then exerted in a sensitive manner only at the periphery of the cast slab 2, are opposed and therefore cooperate to achieve an overall axial rotary stirring of the molten metal. , as shown in the associated thumbnail at the bottom of the figure.
  • the figures 4 and 5 relate to a brewing equipment that can be qualified as elementary in the sense that it comprises a single pair of linear inductors, while the following figures relate to a brewing equipment with four linear inductors, that we can qualify as standard or majority key because this configuration with two pairs of inductors is widely used.
  • the basic brewing equipment shown on the figure 4a thus comprises a pair of rectilinear linear three-phase inductors 1 and 3.
  • the two inductors are placed parallel to each other, face to face and at a distance so as to define between them an air gap for the passage of a cast product 2 of rectangular XXL format , therefore a slab (or even a square bloom).
  • the two inductors 1 and 3 are symmetrical to each other with respect to the main plane of symmetry P of the XXL cast product.
  • FIG. 5 A similar situation is found in the case of casting an XXL bloom of round format as shown on the figure 5 .
  • an XXL bloom 9 of round format being poured is surrounded by a stirring equipment 10 formed this time by two identical linear inductors 11 and 12, of arcuate shape in a semicircle which abut at their ends 15, each then being the symmetrical of the other with respect to the plane of symmetry P of the bloom 9 passing through the casting axis A.
  • Their salient magnetic poles 13, 14 are turned inward to define a closed air gap 16 of size adjusted to the template of the round bloom 9.
  • the sequencing of the phases on each inductor 11, 12 is of the type U, W *, V, U *, W, V *, This expresses that the sliding magnetic field that they each produce progresses from one pole to the next in that order.
  • the two magnetic fields slide in opposite directions, that of the inductor 11 progressing in the clockwise direction shown by the arrow V11, that of the paired inductor 12 progressing in the anti-clockwise direction shown by the arrow V12 .
  • the assembly results in the formation of two adjacent axial circulation loops in mutual counter-rotation 20 and 21 which are identical, well formed and stable, and the addition of which concerns the entire cross section occupied by the molten metal cast.
  • This figure relates to an ingot mold for the continuous casting of XXL steel slabs, equipped with a submerged casting nozzle with four lateral outlet openings to ensure a sufficient inflow of molten metal compatible with the requirements imposed by the production of products cast in such imposing sizes.
  • the electromagnetic mixing equipment comprises a polyphase power supply 22 followed by a phase switch 23 which manages the sliding directions of the magnetic fields on each of the four linear inductors 24a, 24b, 25a, 25b connected in downstream.
  • the four inductors are grouped into two pairs (24 and 25). Each pair of matched inductors 24a, 24b and 25a, 25b is connected to the phase switch 23 separately from the other, but they are both synchronously connected to the common polyphase supply 22.
  • Polyphase power supplies of this type are commercially available. They make it possible to transform the current, supplied by the electrical energy distribution network (50 or 60Hz), into a low-frequency current (say between 2 and 10hz) suitable for the electromagnetic mixing of molten metals.
  • the power supply 22 will incorporate current inverters to enable the N / S polarity of the magnetic poles generated by the coils of the inductors to be reversed.
  • the four linear inductors exemplified here are rectilinear in shape, because they are dedicated to the mixing of an XXL 2 slab. For this purpose, they are mounted, using suitable fasteners not shown, on the two large walls. 28 and 29 of a continuous casting mold 30 provided with an immersed nozzle 31 on the casting axis A.
  • each large wall 28 and 29 of the mold is thus equipped with two unpaired aligned inductors (eg 24a and 25a on the wall 28) and arranged symmetrically to each other on either side of the secondary plane of symmetry Q of the slab, orthogonal on the main plane P and secant on the casting axis A.
  • the fixing members can be adapted to mounting the inductors, no longer at the level of the mold, but below, in the secondary cooling of the casting machine, without what has just been said to be changed.
  • the fields slide in opposite directions on any two neighboring inductors.
  • the two unpaired inductors 24a and 25a or 24b and 25b mounted on the same large wall 28 (respectively 29) of the mold 30, on either side of the secondary plane of symmetry Q
  • the two neighboring inductors of the same pair 24a and 24b, or 25a and 25b mounted symmetrically facing each other, on either side of the main plane of symmetry P.
  • the inductors of pair 24 reproduce the electromagnetic configuration of the paired inductors shown on the diagram. figure 4a .
  • the magnetic fields produced both slide from left to right in the figure, ie in opposite directions on their respective inductors. It can be seen that the same is true for the two paired inductors forming the pair 25 and which, for their part, reproduce the configuration of the two paired inductors of the figure 4b . In this case, therefore, the magnetic fields slide opposite those of the first pair of inductors, i.e. from right to left on this figure 4b .
  • the magnetic fields slide in pairs in opposite directions with the two jets of "fresh" molten metal emerging from the nozzle 31 in the direction of the small faces 32 and 33 of the mold.
  • the “tangential” induction flows, which thus progress over the half-widths of each large wall 28 and 29 of the ingot mold, significantly modify the configuration of the movements of the molten cast metal therein.
  • the unstable natural agitation of the meniscus in the absence of mixing gives way to a configuration of circulatory movements in four adjacent loops 34, 35, 36 and 37, in axial rotation parallel to the casting axis A.
  • each large face of the slab 2 is provided with two aligned inductors, but not paired, namely the two inductors 24a, 25a for one of the large faces and the two inductors 24b, 25b for the other. It is recalled that these pairs of unpaired aligned inductors are therefore symmetrical to each other with respect to the secondary plane of symmetry Q of the slab, intersecting at right angles with the main plane P on the casting axis A .
  • the four adjacent oblong axial circulation loops 34, 35, 36 and 37, stirring the molten metal of the slab 2 are distributed evenly around the casting axis A (and in the cited order) in mutual counter-rotation between two neighboring loops and each time defining between them a common passive return branch of the molten metal.
  • the figure 6b illustrates a situation quite similar in substance to that of the figure 6a .
  • the phase switch 23 has been activated to swap phases V and W on each of the four inductors, all other things being equal.
  • the magnetic fields on two aligned inductors slide this time "away” from each other (we will say that they diverge), leaving the direction of axial rotation of each of the four loops of metal flow is reversed with respect to the electromagnetic configuration of the brewing equipment of the figure 6a previous.
  • the figure 7 shows a circular-shaped brewing equipment mounted around an XXL round bloom 71 in the secondary cooling stage of a continuous casting machine. It is composed of four identical three-phase bipolar linear inductors 72a, 72b, 73a, 73b of arcuate shape in a quarter of a circle, assembled contiguously one after the other, each covering an angular sector of 90 ° of the cast product.
  • the two pairs (72 and 73) are symmetrical with respect to the secondary plane of symmetry Q, which in this case, due to the high order of symmetry of the cast XXL bloom, is equivalent to the plane P.
  • the magnetic poles are not shown. But, the arched arrows on each inductor show the direction of slip of the magnetic fields produced by each of them. As we can see, the fields slide in opposite directions on any two neighboring inductors. If necessary, the reader will be able to reconstruct the sequencing of the electrical phases on each inductor for this purpose, using the phase circle. He will take care, however, to keep the same magnetic polarity on the poles connected to the same phase and placed opposite each other on two paired inductors, thus guaranteeing opposite sliding directions of the two magnetic fields.
  • a mixing configuration of the molten metal is then created in the form of four adjacent loops 74, 75, 76, 77 in axial rotation, stable and regularly distributed over the surrounded by the axis, of casting A, in mutual counter-rotation between two neighbors and occupying at best the entire cross section of the XXL cast product.
  • the linear inductors 82a, 82b, 83a and 83b are mounted around the square bloom 81 at the rate of one inductor per side.
  • the pairs of paired inductors (82a, 82b, and 83a, 83b) are symmetrical with respect to any diagonal plane P, of symmetry of the cast product.
  • the two pairs of inductors 82, 83 are they symmetrical to each other with respect to the other diagonal plane of symmetry Q.
  • the magnetic fields slide in opposite directions.
  • the stirring loops which are then formed, 84, 85, 86 and 87, are there of generally triangular shape, stable and well formed, regularly distributed around the Taxe this flow A, in mutual counter rotation and occupying at best the entire cross section of the XXL cast product.
  • the present invention consists in generating multiple loops of axial circulation of the molten metal in a plane perpendicular to the casting axis, is the homogenization of the temperature in this plane.
  • the long distances specific to the sections of XXL formats cause considerable temperature differences within the molten metal, both radially and in the tangential direction of the cast product. This is true for the liquid metal within the mold and at the meniscus, as it is for the metal below, under the mold, in the secondary cooling of the casting machine.
  • the loops in a way compete with each other, overlap, cancel each other out, are reversed and create fluctuations at the meniscus, which contribute to deteriorating the good lubrication at this location on the wall of the mold, and to drag towards the low in the molten metal the powder of cover which covers it in ingot mold.
  • the power supply to the inductors can be chosen as two-phase, instead of three-phase. It is easy to realize then, simply by constructing the circle of phases only for the U and V phases shifted at 90 °, that swapping these two phases between them, or inverting the magnetic polarities on two poles of the same phase, produces an inversion. of the direction of displacement of the magnetic field in an equivalent manner. Adding these two operations, whatever the order, would therefore allow the need to keep the direction of displacement of the magnetic field, while assigning a given phase to the pole of its choice on the inductor.

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  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Claims (3)

  1. Verfahren zum elektromagnetischen rotierenden Rühren von geschmolzenem Metall im Verlauf des Gießens von metallischen Produkten im XXL-Format mit rundem, quadratischen oder rechteckigen Querschnitt, wobei eine Rührvorrichtung (10), welche mehrphasige, lineare Induktoren (1, 3, 11, 12, 24a, 24b, 25a, 25b) mit wanderndem Magnetfeld aufweist, genutzt wird und das geschmolzene Metall in Form einer Mehrzahl von benachbarten Zirkulationsschleifen (34, 35, 36, 37) in axialer Rotation, welche um die Gießachse (A) herum verteilt sind und höchstens den gesamten Querschnitt des Gießprodukts belegen, gerührt wird, wobei das Verfahren gekennzeichnet ist dadurch, dass das Rühren unter Anordnen der mehrphasigen, linearen Induktoren (1, 3, 11, 12, 24a, 24b, 25a, 25b) mit wanderndem Magnetfeld um die die Gießachse (A) herum umgesetzt wird, um einen Luftstpalt (16) zu bilden, dadurch, dass die wandernden Magnetfelder in dem Luftstpalt (16) so eingestellt werden, dass sie sich an irgendwelchen zwei benachbarten Induktoren (24a, 24b; 25a, 25b) in entgegengesetzte Richtungen bewegen, und dadurch, dass die Polpaare, welche mit einer gleichen elektrischen Phase verbunden sind und sich an zwei unterschiedlichen, paarweisen Induktoren (24a, 24b; 25a, 25b) einander gegenüberliegen, auf die gleiche magnetische Polarität eingestellt werden.
  2. Vorrichtung zum elektromagnetischen Rühren von metallischen Produkten im XXL-Format mit rundem, quadratischen oder rechteckigen Querschnitt, wobei die Vorrichtung zur Durchführung des Verfahrens gemäß dem Anspruch 1 dient und aufweist mindestens ein Paar von linearen Induktoren (1, 3, 11, 12, 24a, 24b, 25a, 25b) mit wanderndem Magnetfeld, welche einander gegenüberliegend symmetrisch bezogen auf eine Symmetrieebene (P) des Gießprodukts um die Gießachse (A) herum dazu angebracht sind, einen Luftspalt (16), durch welchen das Gießprodukt verläuft, zu definieren, mindestens eine elektrische Mehrphasen-Spannungsversorgung (22), welche mit Mitteln zur elektrischen Verbindung (26, 27) mit den Induktoren (1, 3, 11, 12, 24a, 24b, 25a, 25b) versehen ist, und Mittel zum Einstellen der Bewegungsrichtung der Magnetfelder an jedem Induktor, wobei die Vorrichtung dadurch gekennzeichnet ist, dass die Mitteln zur Verbindung (26, 27) die gleiche magnetische Polarität auf jedes Paar von Magnetpolen, welche zur gleichen elektrischen Phase gehören und welche an zwei paarweisen Induktoren (24a, 24b; 25a, 25b) symmetrisch bezüglich der Ebene (P) einander gegenüberliegend angeordnet sind, aufbringen.
  3. Vorrichtung zum elektromagnetischen Rühren gemäß dem Anspruch 2, aufweisend mindestens zwei Paare von linearen Induktoren (24a, 24b; 25a, 25b) mit wanderndem Magnetfeld, welche eine Anordnung aus mindestens vier Induktoren bilden, die um die Gießachse (A) herum derart angeordnet sind, dass ein Luftspalt (16), durch welchen das Gießprodukt verläuft, zu definieren, wobei die Vorrichtung dadurch gekennzeichnet ist, dass die Mittel zum Einstellen der Bewegungsrichtung der Magnetfelder so eingerichtet sind, dass die Magnetfelder von irgendwelchen zwei benachbarten Induktoren (24a, 24b; 25a, 25b) in entgegengesetzte Richtungen wandern.
EP16705807.2A 2016-01-19 2016-01-19 Verfahren für rotierendes elektromagnetisches rühren einer metallschmelze beim giessen eines produkts mit grossem querschnitt und vorrichtung zur durchführung des verfahrens Active EP3405301B1 (de)

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PCT/FR2016/000008 WO2017125649A1 (fr) 2016-01-19 2016-01-19 Procédé de brassage électromagnétique rotatif d'un métal en fusion au cours de la coulée d'un produit a large section et équipement pour sa mise en œuvre.

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EP3405301B1 true EP3405301B1 (de) 2021-05-05

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EP3849726B1 (de) * 2018-09-10 2023-05-03 Ergolines Lab S.r.l. Elektromagnetische rührvorrichtung in einer form zum giessen von aluminium oder aluminiumlegierungen, rührverfahren in einer form zum giessen von aluminium oder aluminiumlegierungen, form und giessmaschine zum giessen von aluminium oder aluminiumlegierungen
CN120815939B (zh) * 2025-09-18 2025-12-30 太原科技大学 一种宽幅镁合金多级分流耦合交错电磁场的铸轧嘴结构

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US3882923A (en) 1972-06-08 1975-05-13 Siderurgie Fse Inst Rech Apparatus for magnetic stirring of continuous castings
JPS6037251A (ja) 1983-08-11 1985-02-26 Kawasaki Steel Corp 連続鋳造鋳型内溶鋼の電磁撹拌方法
LU88034A1 (fr) * 1991-11-13 1993-05-17 Centrem Sa Procédé de brassage électromagnétique en coulée continue
CA2059030C (en) 1992-01-08 1998-11-17 Jun Kubota Method for continuous casting of slab
FR2845626B1 (fr) * 2002-10-14 2005-12-16 Rotelec Sa Procede pour la maitrise des mouvements du metal, dans une lingotiere de coulee continue de brames
FR2893868B1 (fr) * 2005-11-28 2008-01-04 Rotelec Sa Reglage du mode de brassage electromagnetique sur la hauteur d'une lingotiere de coulee continue
FR2957829B1 (fr) 2010-03-23 2012-11-09 Rotelec Sa Rouleau brasseur pour machine de coulee continu de brames

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