EP0145699A1 - Dispositif de brassage dans une installation de coulée continue - Google Patents

Dispositif de brassage dans une installation de coulée continue Download PDF

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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)
English (en)
Other versions
EP0145699B1 (fr
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/fr
Application granted granted Critical
Publication of EP0145699B1 publication Critical patent/EP0145699B1/fr
Expired 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 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.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP84890198A 1983-11-04 1984-10-25 Dispositif de brassage dans une installation de coulée continue Expired EP0145699B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0389683A AT378138B (de) 1983-11-04 1983-11-04 Ruehreinrichtung an einer stranggiessanlage
AT3896/83 1983-11-04

Publications (2)

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

Family

ID=3556912

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84890198A Expired EP0145699B1 (fr) 1983-11-04 1984-10-25 Dispositif de brassage dans une installation de coulée continue

Country Status (5)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT518460A1 (de) * 2016-03-21 2017-10-15 Primetals Technologies Austria GmbH Einen Metallstrang partiell umgreifende Rührspule

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1962341B2 (de) * 1969-12-12 1971-06-24 Aeg Elotherm Gmbh Anordnung einer mehrphasigen elektromagnetischen wicklung am strangfuehrungsgeruest einer stranggiessanlage
DE2756623A1 (de) * 1977-12-19 1979-06-21 Aeg Elotherm Gmbh Vorrichtung an stranggussanlagen zum elektromagnetischen ruehren der erstarrenden stranggussmasse
EP0009803A1 (fr) * 1978-10-06 1980-04-16 Concast Holding Ag Procédé de coulée continue d'acier

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 (de) * 1978-04-26 1983-09-08 Aeg-Elotherm Gmbh, 5630 Remscheid Vorrichtung an Stranggießanlagen zum elektromagnetschen Rühren des Strangsumpfes
FI63682C (fi) * 1978-07-28 1983-08-10 Concast Ag Foerfarande foer gjutning av en metallstaong
SE430223B (sv) * 1979-11-06 1983-10-31 Asea Ab Forfaringssett for omroring vid strenggjutning
KR100214624B1 (ko) * 1996-12-03 1999-08-02 구자홍 냉장고의 외부 표시장치
FR2930281B1 (fr) * 2008-04-16 2011-05-06 Faurecia Sys Echappement Ligne d'echappement de vehicule automobile avec conduit de recyclage.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1962341B2 (de) * 1969-12-12 1971-06-24 Aeg Elotherm Gmbh Anordnung einer mehrphasigen elektromagnetischen wicklung am strangfuehrungsgeruest einer stranggiessanlage
DE2756623A1 (de) * 1977-12-19 1979-06-21 Aeg Elotherm Gmbh Vorrichtung an stranggussanlagen zum elektromagnetischen ruehren der erstarrenden stranggussmasse
EP0009803A1 (fr) * 1978-10-06 1980-04-16 Concast Holding Ag Procédé de coulée continue d'acier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT518460A1 (de) * 2016-03-21 2017-10-15 Primetals Technologies Austria GmbH Einen Metallstrang partiell umgreifende Rührspule
AT518460B1 (de) * 2016-03-21 2021-07-15 Primetals Technologies Austria GmbH Einen Metallstrang partiell umgreifende Rührspule

Also Published As

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

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