EP0145699A1 - Stirring device in a continuous casting plant - Google Patents

Stirring device in a continuous casting plant Download PDF

Info

Publication number
EP0145699A1
EP0145699A1 EP84890198A EP84890198A EP0145699A1 EP 0145699 A1 EP0145699 A1 EP 0145699A1 EP 84890198 A EP84890198 A EP 84890198A EP 84890198 A EP84890198 A EP 84890198A EP 0145699 A1 EP0145699 A1 EP 0145699A1
Authority
EP
European Patent Office
Prior art keywords
phase
continuous casting
stirring device
phases
induction elements
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.)
Granted
Application number
EP84890198A
Other languages
German (de)
French (fr)
Other versions
EP0145699B1 (en
Inventor
Aktiengesellschaf Voest-Alpine
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.)
Primetals Technologies Austria GmbH
Original Assignee
Voestalpine AG
Voest Alpine Industrienlagenbau GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3556912&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0145699(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Voestalpine AG, Voest Alpine Industrienlagenbau GmbH filed Critical Voestalpine AG
Publication of EP0145699A1 publication Critical patent/EP0145699A1/en
Application granted granted Critical
Publication of EP0145699B1 publication Critical patent/EP0145699B1/en
Expired legal-status Critical Current

Links

Images

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 invention relates to a stirring device on a continuous casting installation, in particular on a steel continuous casting installation, with at least two magnetic induction elements operated one after the other on a strand guide and in the longitudinal direction thereof, each induction element being connected to a separate phase of the at least two-phase alternating current and the phases against one another are shifted by the phase angle 0 ° ⁇ 180 °.
  • a stirring device with which a discontinuous metal flow can be achieved in the core zone of the strand in order to avoid segregation is known from DE-B - 1 962 341. It has moving field inductors arranged one after the other in the longitudinal direction of the strand guide, each with multi-phase rod winding.
  • a multi-phase sinusoidal electrical voltage causes an electric traveling field in the form of a wave traveling in the longitudinal direction of the traveling field inductors.
  • the traveling field inductors are either switched on and off alternately or reversed or supplied by means of a continuously or suddenly changing inductor voltage.
  • This known stirring device requires its own control for switching on and off or reversing the polarity or changing the induction voltage in order to achieve a discontinuous metal flow.
  • the invention aims to avoid this disadvantage and has the object to provide a stirring device of the type described above, with which a discontinuous stirring and thus a continuous change in the metal flow in the strand is possible and the formation of a constantly rectified circulation flow is avoided, the Stirring device should be simple and robust and does not require additional switching devices.
  • phase angle difference r + 180 °.
  • a preferred embodiment with at least three induction elements which are connected to a three-phase or three-phase network connected in a star or delta configuration is characterized in that one induction element is connected in opposition to the other two induction elements.
  • FIG. 1 showing a circuit diagram for three induction elements according to a first embodiment lying one behind the other in the longitudinal direction of the strand.
  • Fig. 2 shows an analog representation of a second embodiment.
  • 3, 4 and 5 show the preferred constructive design of yokes.
  • FIG. 1 three induction elements arranged one after the other in the longitudinal direction of a strand 1 continuously cast in a continuous casting installation, the shell of which is designated by 2 and the liquid core are designated 3, are formed as coils 4, 5, 6, optionally equipped with cores or yokes are. These stirrers 4, 5, 6 are provided along the strand guide, not shown, of the continuous casting installation.
  • the coils 4 to 6 are connected to a three-phase network 9 which is constructed in a delta connection, in contrast to the embodiment shown in FIG. 1 the coils not with their axis 10 perpendicular to the strand surface 8, but parallel to the latter lying, etc. parallel to axis 11 or longitudinal direction of the strand and the strand guide.
  • the middle coil 5 is connected in opposition to the other two coils 4 and 6, so that likewise no traveling field continuously propagating over the three coils can arise, but rather a discontinuous alternating magnetic field is formed.
  • the frequency of the alternating current of the embodiments shown in FIGS. 1 and 2 is expediently between 2 and 120 Hz.
  • 3 and 5 show embodiments with six stirrers 4, 4 '; 5, 5 'and 6, 6', each of which three 4, 5, 6 and 4 ', 5', 6 'are connected as shown in FIGS. 1 or 2.
  • two coils each have a common yoke 12 or 13, which is formed from soft magnetic material.
  • Two coils 4, 4 'or 5, 5' and 6, 6 ', each connected in the same direction, can be connected in series or series with one phase or one conductor R, S, T or N, so that each phase or a coil group is supplied by each conductor R, S, T (N).
  • the relative movement of the molten metal to the strand shell breaks the dendrites formed on the solidification front and, because of their difference in density to the melt, enters them in the liquid part of the strand.
  • An inconsistent change in the concentration of the thin layer, in the transition between the liquid and the solid state of aggregate, cannot or only to a small extent take place by the stirring device according to the invention, so that the formation of a white band is omitted or occurs only to a small, non-disturbing extent.

Landscapes

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

Abstract

Bei einer Rühreinrichtung an einer Stranggiessanlage, insbesondere an einer Stahlstranggiessanlage, mit mindestens zwei an einer Strangführung und in deren Längsrichtung (11) nacheinander angeordneten magnetischen, mit Wechselstrom betriebenen Induktionselementen (4, 5, 6) ist jedes Induktionselement (4 bis 6) an eine eigene Phase (R, S, T, N) des zumindest zweiphasigen Wechselstromes angeschlossen und sind die Phasen (R, S, T, N) gegeneinander um den Phasenwinkel 0° < φ <= 180° verschoben. Um die Ausbildung einer ständig gleichgerichteten Umlaufströmung trotz einfach und robust aufgebauter Rühreinrichtung zu vermeiden, wobei zusätzliche Schalteinrichtungen nicht erforderlich sind, rufen die Phasen (R, S, T, N) unter Bildung eines magnetischen Wechselfeldes an mindestens zwei benachbarten Induktionselementen (4 bis 6) jeweils elektromotorische Kräfte hervor, deren Momentanwertdifferenzen und Richtungsunterschiede einer Phasenwinkeldifferenz von φ + 180° entsprechen.In the case of a stirring device on a continuous casting installation, in particular on a steel continuous casting installation, with at least two magnetic induction elements (4, 5, 6) arranged one after the other on a strand guide and in its longitudinal direction (11), each induction element (4 to 6) is connected to one own phase (R, S, T, N) of the at least two-phase alternating current is connected and the phases (R, S, T, N) are shifted from each other by the phase angle 0 ° <φ <= 180 °. In order to avoid the formation of a constant flow in the same direction despite the simple and robust design of the stirring device, whereby additional switching devices are not required, the phases (R, S, T, N) call with formation of a magnetic alternating field at at least two adjacent induction elements (4 to 6) each show electromotive forces whose instantaneous value differences and directional differences correspond to a phase angle difference of φ + 180 °.

Description

Die Erfindung betrifft eine Rühreinrichtung an einer Stranggießanlage, insbesondere an einer Stahlstranggießanlage, mit mindestens zwei an einer Strangführung und in deren Längsrichtung nacheinander angeordneten magnetischen, mit Wechselstrom betriebenen Induktionselementen, wobei jedes Induktionselement an eine eigene Phase des zumindest zweiphasigen Wechselstromes angeschlossen ist und die Phasen gegeneinander um den Phasenwinkel 0°<ϕ≤ 180° verschoben sind.The invention relates to a stirring device on a continuous casting installation, in particular on a steel continuous casting installation, with at least two magnetic induction elements operated one after the other on a strand guide and in the longitudinal direction thereof, each induction element being connected to a separate phase of the at least two-phase alternating current and the phases against one another are shifted by the phase angle 0 ° <ϕ≤ 180 °.

Mit einer Rühreinrichtung dieser Art (DE-A - 27 56 623) wird eine kontinuierliche Relativbewegung der Schmelze im Bereich der Rühreinrichtung erzielt. Dies hat den Nachteil, daß es durch unstetige Konzentrationsänderungen zu Inhomogenitäten in Querrichtung des Stranges (weißen Bändern), die die Gebrauchseigenschaften beeinträchtigen, kommt.With a stirring device of this type (DE-A - 27 56 623) a continuous relative movement of the melt is achieved in the area of the stirring device. This has the disadvantage that discontinuous changes in concentration lead to inhomogeneities in the transverse direction of the strand (white bands) which impair the properties of use.

Eine Rühreinrichtung, mit der eine diskontinuierliche Metallströmung in der Kernzone des Stranges zwecks Vermeidung von Ausseigerungen erzielt werden kann, ist aus der DE-B - 1 962 341 bekannt. Sie weist in Längsrichtung der Strangführung nacheinander angeordnete Wanderfeldinduktoren mit jeweils mehrphasiger Stabwicklung auf. Eine mehrphasige sinusförmige elektrische Spannung bewirkt ein elektrisches Wanderfeld in Form einer in Längsrichtung der Wanderfeldinduktoren fortschreitenden Welle. Zur Vermeidung von Ausseigerungen im Zentrum des Gußstranges werden die Wanderfeldinduktoren entweder abwechselnd ein- und ausgeschaltet oder umgepolt oder mittels einer stetig bzw. sprunghaft sich ändernden Induktorspannung versorgt. Diese bekannte Rühreinrichtung benötigt zur Erzielung einer diskontinuierlichen Metallströmung eine eigene Steuerung für das Ein- und Ausschalten bzw. Umpolen bzw. Ändern der Induktionsspannung.A stirring device with which a discontinuous metal flow can be achieved in the core zone of the strand in order to avoid segregation is known from DE-B - 1 962 341. It has moving field inductors arranged one after the other in the longitudinal direction of the strand guide, each with multi-phase rod winding. A multi-phase sinusoidal electrical voltage causes an electric traveling field in the form of a wave traveling in the longitudinal direction of the traveling field inductors. To avoid segregation in the center of the cast strand, the traveling field inductors are either switched on and off alternately or reversed or supplied by means of a continuously or suddenly changing inductor voltage. This known stirring device requires its own control for switching on and off or reversing the polarity or changing the induction voltage in order to achieve a discontinuous metal flow.

Die Erfindung bezweckt die Vermeidung dieses Nachteiles und stellt sich die Aufgabe, eine Rühreinrichtung der eingangs beschriebenen Art zu schaffen, mit der ein diskontinuierliches Rühren und damit eine fortlaufende Änderung der Metallströmung im Strang möglich ist und die Ausbildung einer ständig gleichgerichteten Umlaufströmung vermieden wird, wobei die Rühreinrichtung einfach und robust aufgebaut sein soll und ohne zusätzliche Schalteinrichtungen auskommt.The invention aims to avoid this disadvantage and has the object to provide a stirring device of the type described above, with which a discontinuous stirring and thus a continuous change in the metal flow in the strand is possible and the formation of a constantly rectified circulation flow is avoided, the Stirring device should be simple and robust and does not require additional switching devices.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Phasen unter Bildung eines magnetischen Wechselfeldes an mindestens zwei benachbarten Induktionselementen jeweils elektromotorische Kräfte hervorrufen, deren Momentanwertdifferenzen und Richtungsunterschiede einer Phasenwinkeldifferenz von r + 180° entsprechen.This object is achieved according to the invention in that the phases each produce electromotive forces on at least two adjacent induction elements with the formation of a magnetic alternating field, whose instantaneous value differences and directional differences correspond to a phase angle difference of r + 180 °.

Eine bevorzugte Ausführungsform mit mindestens drei Induktionselementen, die an einem im stern- oder im dreieckgeschalteten Dreiphasen-Drehstromnetz angeschlossen sind, ist dadurch gekennzeichnet, daß ein Induktionselement zu den beiden anderen Induktionselementen gegengeschaltet ist.A preferred embodiment with at least three induction elements which are connected to a three-phase or three-phase network connected in a star or delta configuration is characterized in that one induction element is connected in opposition to the other two induction elements.

Die Erfindung ist nachfolgend anhand der Zeichnung an mehreren Ausführungsbeispielen in schematischer Darstellung näher erläutert, wobei Fig. 1 ein Schaltschema für drei in Stranglängsrichtung hintereinander liegende Induktionselemente gemäß einer ersten Ausführungsform zeigt. Fig. 2 zeigt in analoger Darstellung eine zweite Ausführungsform. Die Fig. 3, 4 und 5 zeigen die bevorzugte konstruktive Ausbildung von Jochen.The invention is explained in more detail below with reference to the drawing using several exemplary embodiments in a schematic representation, FIG. 1 showing a circuit diagram for three induction elements according to a first embodiment lying one behind the other in the longitudinal direction of the strand. Fig. 2 shows an analog representation of a second embodiment. 3, 4 and 5 show the preferred constructive design of yokes.

Gemäß Fig. 1 sind drei in Längsrichtung eines in einer Stranggießanlage kontinuierlich gegossenen Stranges 1, dessen Schale mit 2 und dessen flüssiger Kern mit 3 bezeichnet sind, nacheinander angeordnete Induktionselemente vorgesehen, die als gegebenenfalls mit Kernen oder Jochen ausgestattete Spulen 4, 5, 6 ausgebildet sind. Diese Rührer 4, 5, 6 sind entlang der nicht dargestellten Strangführung der Stranggießanlage vorgesehen.According to FIG. 1, three induction elements arranged one after the other in the longitudinal direction of a strand 1 continuously cast in a continuous casting installation, the shell of which is designated by 2 and the liquid core are designated 3, are formed as coils 4, 5, 6, optionally equipped with cores or yokes are. These stirrers 4, 5, 6 are provided along the strand guide, not shown, of the continuous casting installation.

Zur Versorgung der Spulen 4, 5, 6 dient ein Dreiphasen-Drehstromnetz 7, dessen Phasen bzw. Leiter R, S, T in Sternschaltung geschaltet sind. Die Spulen 4, 5, 6 sind erfindungsgemäß folgendermaßen an das Drehstromnetz angeschlossen:

  • Von der ersten Spule 4 und von der letzten Spule 6 ist jeweils das näher beim Strang liegende Ende an den Rund T-Leiter angeschlossen, wogegen das von der Spule 5 näher bei der Strangoberfläche 8 liegende Ende an den Mittelpunktleiter N angeschlossen ist. Die beiden von der Strangoberfläche 8 entfernter liegenden Enden der ersten und letzten Spule 4 und 6 sind an den Mittelpunktleiter N und das von der Strangoberfläche 8 entfernter liegende Ende der mittleren Spule 5 ist an den S-Leiter angeschlossen. Durch die auf diese Weise gegengeschaltete mittlere Spule 5 entsteht ein diskontinuierliches magnetisches Wechselfeld, welches die Ausbreitung einer von der ersten bis zur letzten Spule 4 und 6 gleichgerichteten Strömung der Metallschmelze im flüssigen Kern 3 des Stranges 1 hintanhält. Die Phasenverschiebung der drei Drehstromphasen R, S, T beträgt, wie üblich, 120°.
A three-phase three-phase network 7 is used to supply the coils 4, 5, 6, the phases or conductors R, S, T of which are connected in a star connection. According to the invention, the coils 4, 5, 6 are connected to the three-phase network as follows:
  • Of the first coil 4 and of the last coil 6, the end closer to the strand is connected to the round T conductor, whereas the end closer to the strand surface 8 of coil 5 is connected to the center conductor N. The two ends of the first and last coils 4 and 6 which are further away from the strand surface 8 are connected to the center conductor N and the end of the middle coil 5 which is further away from the strand surface 8 is connected to the S-conductor. The middle coil 5, which is connected in this way, creates a discontinuous alternating magnetic field, which prevents the propagation of a the first to the last coil 4 and 6 rectified flow of the molten metal in the liquid core 3 of the strand 1 continues. The phase shift of the three three-phase phases R, S, T is, as usual, 120 °.

Gemäß der in Fig. 2 dargestellten Ausführungsform sind die Spulen 4 bis 6 an ein in Dreieckschaltung aufgebautes Drehstromnetz 9 geschaltet, wobei im Unterschied zu der in Fig. 1 dargestellten Ausführungsform die Spulen nicht mit ihrer Achse 10 senkrecht zur Strangoberfläche 8, sondern parallel zu dieser liegen, u.zw. parallel zur Achse 11 bzw. Längsrichtung des Stranges und der Strangführung. Auch hier ist die mittlere Spule 5 zu den beiden anderen Spulen 4 und 6 gegengeschaltet, so daß ebenfalls kein sich über die drei Spulen kontinuierlich fortpflanzendes Wanderfeld entstehen kann, sondern ein diskontinuierliches magnetisches Wechselfeld gebildet wird.According to the embodiment shown in FIG. 2, the coils 4 to 6 are connected to a three-phase network 9 which is constructed in a delta connection, in contrast to the embodiment shown in FIG. 1 the coils not with their axis 10 perpendicular to the strand surface 8, but parallel to the latter lying, etc. parallel to axis 11 or longitudinal direction of the strand and the strand guide. Here, too, the middle coil 5 is connected in opposition to the other two coils 4 and 6, so that likewise no traveling field continuously propagating over the three coils can arise, but rather a discontinuous alternating magnetic field is formed.

Die Frequenz des Wechselstromes der in den Fig. 1 und 2 dargestellten Ausführungsformen liegt zweckmäßig zwischen 2 und 120 Hz.The frequency of the alternating current of the embodiments shown in FIGS. 1 and 2 is expediently between 2 and 120 Hz.

Die Fig. 3, 4 und 5 zeigen Ausführungsformen mit sechs Rührern 4, 4'; 5, 5' und 6, 6', von denen jeweils drei 4, 5, 6 und 4', 5', 6' so geschaltet sind, wie dies in den Fig. 1 oder 2 gezeigt ist. Gemäß den Fig. 3 und 4 weisen jeweils zwei Spulen ein gemeinsames Joch 12 bzw. 13 auf, welches aus weichmagnetischem Werkstoff gebildet ist. Zwei jeweils gleichsinnig geschaltete Spulen 4, 4' bzw. 5, 5' und 6, 6' können in Reihen oder Serien mit jeweils einer Phase bzw. einem Leiter R, S, T bzw. N geschaltet sein, so daß von jeder Phase bzw. von jedem Leiter R, S, T (N) eine Spulengruppe versorgt wird.3, 4 and 5 show embodiments with six stirrers 4, 4 '; 5, 5 'and 6, 6', each of which three 4, 5, 6 and 4 ', 5', 6 'are connected as shown in FIGS. 1 or 2. 3 and 4, two coils each have a common yoke 12 or 13, which is formed from soft magnetic material. Two coils 4, 4 'or 5, 5' and 6, 6 ', each connected in the same direction, can be connected in series or series with one phase or one conductor R, S, T or N, so that each phase or a coil group is supplied by each conductor R, S, T (N).

Gemäß der Ausführungsform nach Fig. 5 sind sämtliche sechs Spulen 4 bis 6' an einem gemeinsamen Kammjoch 14 angeordnet.5 are all six coils 4 to 6 'arranged on a common comb yoke 14.

Durch die Relativbewegung der Metallschmelze zur Strangschale werden die an der Erstarrungsfront entstehenden Dendriten gebrochen und wegen ihres Dichteunterschiedes zur Schmelze in den flüssigen Teil des Stranges eingetragen. Eine unstetige Konzentrationsänderung an der dünnen Schicht, im Übergang zwischen dem flüssigen und dem festen Aggregatzustsand, kann durch die erfindungsgemäße Rühreinrichtung nicht oder nur in geringem Maß erfolgen, so daß die Ausbildung eines weißen Bandes unterbleibt oder nur in geringem, nicht störendem Ausmaß eintritt.The relative movement of the molten metal to the strand shell breaks the dendrites formed on the solidification front and, because of their difference in density to the melt, enters them in the liquid part of the strand. An inconsistent change in the concentration of the thin layer, in the transition between the liquid and the solid state of aggregate, cannot or only to a small extent take place by the stirring device according to the invention, so that the formation of a white band is omitted or occurs only to a small, non-disturbing extent.

Die günstigen Auswirkungen der elektromagnetischen Beeinflussung der Erstarrung von Strangguß können somit voll genutzt werden, ohne daß die dem bisherigen technischen Gebrauch entsprechenden Nachteile der veränderten Rührintensität in Kauf genommen werden müssen.The beneficial effects of the electromagnetic influence on the solidification of continuous casting can thus be fully exploited without having to accept the disadvantages of the changed stirring intensity which correspond to the previous technical use.

Claims (2)

1. Rühreinrichtung an einer Stranggießanlage, insbesondere an einer Stahlstranggießanlage, mit mindestens zwei an einer Strangführung und in deren Längsrichtung (11) nacheinander angeordneten magnetischen, mit Wechselstrom betriebenen Induktionselementen (4, 5, 6; 4', 5', 6'), wobei jedes Induktionselement (4 bis 6') an eine eigene Phase (R, S, T, N) des zumindest zweiphasigen Wechselstromes angeschlossen ist und die Phasen (R, S, T, N) gegeneinander um den Phasenwinkel 0<γ≤180° verschoben sind, dadurch gekennzeichnet, daß die Phasen (R, S, T, N) unter Bildung eines magnetischen Wechselfeldes an mindestens zwei benachbarten Induktionselementen (4 bis 6') jeweils elektromotorische Kräfte hervorrufen, deren Momentanwertdifferenzen und Richtungsunterschiede einer Phasenwinkeldifferenz von ϕ + 180° entsprechen.1.Stirring device on a continuous casting installation, in particular on a steel continuous casting installation, with at least two magnetic induction elements (4, 5, 6; 4 ', 5', 6 ') arranged one after the other on a strand guide and in its longitudinal direction (11), wherein each induction element (4 to 6 ') is connected to its own phase (R, S, T, N) of the at least two-phase alternating current and the phases (R, S, T, N) against each other by the phase angle 0 <γ≤180 ° are shifted, characterized in that the phases (R, S, T, N) each produce electromotive forces with the formation of a magnetic alternating field on at least two adjacent induction elements (4 to 6 '), their instantaneous value differences and directional differences of a phase angle difference of ϕ + 180 ° correspond. 2. Einrichtung nach Anspruch 1, mit mindestens drei Induktionselementen (4, 5, 6; 4', 5', 6'), die an einem im stern- oder im dreieckgeschalteten Dreiphasen-Drehstromnetz angeschlossen sind, dadurch gekennzeichnet, daß ein Induktionselement (5; 5') zu den beiden anderen Induktionselementen (4, 6; 4', 6') gegengeschaltet ist.2. Device according to claim 1, with at least three induction elements (4, 5, 6; 4 ', 5', 6 '), which are connected to a star or delta-connected three-phase three-phase network, characterized in that an induction element ( 5; 5 ') to the other two induction elements (4, 6; 4', 6 ') is connected.
EP84890198A 1983-11-04 1984-10-25 Stirring device in a continuous casting plant Expired EP0145699B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0389683A AT378138B (en) 1983-11-04 1983-11-04 STIRRING DEVICE ON A CONTINUOUS CASTING SYSTEM
AT3896/83 1983-11-04

Publications (2)

Publication Number Publication Date
EP0145699A1 true EP0145699A1 (en) 1985-06-19
EP0145699B1 EP0145699B1 (en) 1988-05-18

Family

ID=3556912

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84890198A Expired EP0145699B1 (en) 1983-11-04 1984-10-25 Stirring device in a continuous casting plant

Country Status (5)

Country Link
US (1) US4909306A (en)
EP (1) EP0145699B1 (en)
JP (1) JPS60111749A (en)
AT (1) AT378138B (en)
DE (1) DE3471269D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT518460A1 (en) * 2016-03-21 2017-10-15 Primetals Technologies Austria GmbH A metal strand partially enclosing stirring coil

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1962341B2 (en) * 1969-12-12 1971-06-24 Aeg Elotherm Gmbh ARRANGEMENT OF A MULTI-PHASE ELECTROMAGNETIC WINDING ON THE STRAND GUIDE FRAMEWORK OF A CONTINUOUS CASTING PLANT
DE2756623A1 (en) * 1977-12-19 1979-06-21 Aeg Elotherm Gmbh Electromagnetic stirrer for continuous casting plant - has laminated magnet cores located between non-magnetic guide and support rolls
EP0009803A1 (en) * 1978-10-06 1980-04-16 Concast Holding Ag Method for continuously casting steel

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5326210A (en) * 1976-08-25 1978-03-10 Nissan Motor Co Ltd Balk ring of iron system sintered metal made
JPS5437086A (en) * 1977-08-29 1979-03-19 Takehisa Akiyama Air purification
GB2013542B (en) * 1978-02-01 1982-01-20 Concast Ag Continuous casting mould
DE2818183C2 (en) * 1978-04-26 1983-09-08 Aeg-Elotherm Gmbh, 5630 Remscheid Device on continuous casting plants for electromagnetic stirring of the strand sump
FI63682C (en) * 1978-07-28 1983-08-10 Concast Ag FOER FARING FOER GJUTNING AV EN METALLSTAONG
SE430223B (en) * 1979-11-06 1983-10-31 Asea Ab METHOD OF CHARACTERIZATION BY STRING
KR100214624B1 (en) * 1996-12-03 1999-08-02 구자홍 Displaying device in ref.
FR2930281B1 (en) * 2008-04-16 2011-05-06 Faurecia Sys Echappement EXHAUST LINE OF MOTOR VEHICLE WITH RECYCLING CONDUIT.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1962341B2 (en) * 1969-12-12 1971-06-24 Aeg Elotherm Gmbh ARRANGEMENT OF A MULTI-PHASE ELECTROMAGNETIC WINDING ON THE STRAND GUIDE FRAMEWORK OF A CONTINUOUS CASTING PLANT
DE2756623A1 (en) * 1977-12-19 1979-06-21 Aeg Elotherm Gmbh Electromagnetic stirrer for continuous casting plant - has laminated magnet cores located between non-magnetic guide and support rolls
EP0009803A1 (en) * 1978-10-06 1980-04-16 Concast Holding Ag Method for continuously casting steel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT518460A1 (en) * 2016-03-21 2017-10-15 Primetals Technologies Austria GmbH A metal strand partially enclosing stirring coil
AT518460B1 (en) * 2016-03-21 2021-07-15 Primetals Technologies Austria GmbH Stirring coil partially encompassing a metal strand

Also Published As

Publication number Publication date
AT378138B (en) 1985-06-25
EP0145699B1 (en) 1988-05-18
ATA389683A (en) 1984-11-15
US4909306A (en) 1990-03-20
JPS60111749A (en) 1985-06-18
JPH0523867B2 (en) 1993-04-06
DE3471269D1 (en) 1988-06-23

Similar Documents

Publication Publication Date Title
DE2731238C2 (en) Method and device for the continuous casting of steel in particular under the influence of a traveling magnetic field
DE2656389C3 (en) Synchronous linear motor
DE2641260C2 (en)
DE2802753C2 (en) Synchronous machine
DE2726623A1 (en) ELECTROMAGNETIC DEVICE FOR ROTATING A METAL MELT
DE69219317T2 (en) METHOD AND DEVICE FOR POURING INTO A MOLD
DE2803503A1 (en) TWO- OR MULTI-PHASE CONVERTER
DE3122155C2 (en)
DE2558879C2 (en) DC powered arc furnace
DE69224148T2 (en) Process for electromagnetic guidance in continuous casting
DE69632434T2 (en) Strangiessenanlage
EP0028761B1 (en) Method of stirring during continuous casting
EP0145699B1 (en) Stirring device in a continuous casting plant
DE3105636A1 (en) &#34;ADJUSTABLE DC VOLTAGE SUPPLY&#34;
WO1997007911A1 (en) Electromagnetic device for use with a continuous-casting mould
EP1427553B1 (en) Method and device for producing a metal strip in a strip casting machine with rolls
DE2003945C3 (en) Plant for electroslag remelting of metals, especially steels
DE19954452A1 (en) Process for setting the force density during inductive stirring and conveying and inductors for inductive stirring and conveying electrically conductive liquids
DE3039491A1 (en) METHOD FOR STIRRING THE NON-SETTING AREAS IN A CASTING LEAF EXITING FROM A CONTINUOUS CASTING MACHINE
DE3510261A1 (en) STIRRING DEVICE ON A CONTINUOUS CASTING SYSTEM
DE2331090C3 (en) Channel furnace
DE19632818C2 (en) Rotor coil for unipolar electrical machines
DE2730496C2 (en) Circuit arrangement for a pair of planar traveling field inductors
EP4249146A1 (en) Electromagnetic stirring and braking device for a mould for producing metal slabs
DE1964684C3 (en) Device for the transport of electrically conductive non-magnetic bodies by means of a moving magnetic field

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19851203

17Q First examination report despatched

Effective date: 19861113

D17Q First examination report despatched (deleted)
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE FR GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 3471269

Country of ref document: DE

Date of ref document: 19880623

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ITF It: translation for a ep patent filed
ET Fr: translation filed
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: ASEA BROWN BOVERI AB

Effective date: 19890217

NLR1 Nl: opposition has been filed with the epo

Opponent name: ASEA BROWN BOVERI AB

ITPR It: changes in ownership of a european patent

Owner name: CESSIONE;VOEST - ALPINE INDUSTRIEANLAGENBAU GMBH

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732

PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: OPPOSITION REJECTED

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: VOEST-ALPINE INDUSTRIEANLAGENBAU GESELLSCHAFT M.B.

27O Opposition rejected

Effective date: 19901124

NLR2 Nl: decision of opposition
NLS Nl: assignments of ep-patents

Owner name: VOEST-ALPINE INDUSTRIEANLAGENBAU GESELLSCHAFT M.B.

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: VOEST-ALPINE INDUSTRIEANLAGENBAU GESELLSCHAFT MBH

ITTA It: last paid annual fee
EPTA Lu: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 84890198.9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19980914

Year of fee payment: 15

Ref country code: GB

Payment date: 19980914

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19980916

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19980918

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19980922

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19980925

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19980929

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19980930

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991025

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991025

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19991030

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991031

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991031

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991031

BERE Be: lapsed

Owner name: VOEST-ALPINE INDUSTRIEANLAGENBAU G.M.B.H.

Effective date: 19991031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000501

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19991025

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EUG Se: european patent has lapsed

Ref document number: 84890198.9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000630

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20000501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000801

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST