EP0145699B1 - Rühreinrichtung an einer Stranggiessanlage - Google Patents

Rühreinrichtung an einer Stranggiessanlage Download PDF

Info

Publication number
EP0145699B1
EP0145699B1 EP84890198A EP84890198A EP0145699B1 EP 0145699 B1 EP0145699 B1 EP 0145699B1 EP 84890198 A EP84890198 A EP 84890198A EP 84890198 A EP84890198 A EP 84890198A EP 0145699 B1 EP0145699 B1 EP 0145699B1
Authority
EP
European Patent Office
Prior art keywords
induction elements
induction
phase
alternating current
phase angle
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
Application number
EP84890198A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0145699A1 (de
Inventor
Aktiengesellschaft 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(B1) "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/de
Application granted granted Critical
Publication of EP0145699B1 publication Critical patent/EP0145699B1/de
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 three induction elements arranged one after the other on a strand guide and in the longitudinal direction thereof, for the formation of a magnetic traveling field operated by alternating current, the phases of the alternating current being phi with one another , usually from 120 °. are shifted, and each induction element is connected to a separate phase of the at least three-phase alternating current.
  • 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 current 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.
  • the induction elements are electrically connected such that the currents and consequently the strengths and directions of the associated electromagnetic fields on at least two adjacent induction elements differ at all times in addition to the fixed phase angle phi by a phase angle of 180 °.
  • a preferred embodiment with induction elements, which are connected to a three-phase three-phase network connected in a star or a triangle, is characterized in that an induction element has a connection with the three-phase network opposite to its neighboring induction elements.
  • FIG. 1 shows 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.
  • 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 induction elements 4, 5, 6 are provided along the strand guide, not shown, of the continuous casting installation.
  • a three-phase three-phase network 7 is used to supply the induction elements 4, 5, 6, the phases or conductors R, S, T of which are connected in a star connection.
  • the induction elements 4, 5, 6 are connected to the three-phase network as follows:
  • the end closer to the strand is connected to the round T-conductor, whereas the end closer to the strand surface 8 of the induction element 5 is connected to the center conductor H.
  • the two ends of the first and last induction elements 4 and 6 which are remote from the strand surface 8 are connected to the center conductor N and the end of the central induction elements 5 which is further away from the strand surface 8 is connected to the S conductor.
  • the phase shift of the three three-phase phases R, S, T is, as usual, 120 °.
  • the induction elements 4 to 6 are connected to a three-phase network 9 constructed in a delta connection, in contrast to that shown in FIG. 1 Embodiment, the induction elements do not lie with their axis 10 perpendicular to the strand surface 8, but parallel to it, etc. parallel to axis 11 or longitudinal direction of the strand and the strand guide.
  • the middle induction element 5 is connected in opposition to the two other induction elements 4 and 6, so that likewise no traveling field continuously propagating through the three induction elements 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.
  • FIGS. 3 and 5 show embodiments with six induction elements 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 induction elements each have common yokes 12 and 13, which is formed from soft magnetic material.
  • Two induction elements 4, 4 'and 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 an induction element 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)
EP84890198A 1983-11-04 1984-10-25 Rühreinrichtung an einer Stranggiessanlage Expired EP0145699B1 (de)

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 EP0145699A1 (de) 1985-06-19
EP0145699B1 true EP0145699B1 (de) 1988-05-18

Family

ID=3556912

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84890198A Expired EP0145699B1 (de) 1983-11-04 1984-10-25 Rühreinrichtung an einer Stranggiessanlage

Country Status (5)

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

Families Citing this family (1)

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

Family Cites Families (11)

* 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
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
DE2756623A1 (de) * 1977-12-19 1979-06-21 Aeg Elotherm Gmbh Vorrichtung an stranggussanlagen zum elektromagnetischen ruehren der erstarrenden stranggussmasse
DE2903225A1 (de) * 1978-02-01 1979-08-02 Concast Ag Stranggiesskokille
DE2818183C2 (de) * 1978-04-26 1983-09-08 Aeg-Elotherm Gmbh, 5630 Remscheid Vorrichtung an Stranggießanlagen zum elektromagnetschen Rühren des Strangsumpfes
DE2965366D1 (en) * 1978-07-28 1983-06-16 Concast Holding Ag Method for continuously casting metal in a mould and influence of an electro-magnetic field
CH632431A5 (de) * 1978-10-06 1982-10-15 Concast Ag Verfahren zum stranggiessen von stahl.
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.

Also Published As

Publication number Publication date
EP0145699A1 (de) 1985-06-19
DE3471269D1 (en) 1988-06-23
US4909306A (en) 1990-03-20
AT378138B (de) 1985-06-25
JPH0523867B2 (ja) 1993-04-06
JPS60111749A (ja) 1985-06-18
ATA389683A (de) 1984-11-15

Similar Documents

Publication Publication Date Title
DE2656389C3 (de) Synchroner Linearmotor
DE2641260A1 (de) Verfahren und vorrichtung zur beeinflussung eines eine kokille durchsetzenden metallstrangs mittels eines einen ruehreffekt bewirkenden magnetischen feldes
DE2726623A1 (de) Elektromagnetische einrichtung zur rotation einer metallschmelze
DE2803503A1 (de) Zwei- oder mehrphasiger umruehrer
DE69632434T2 (de) Strangiessenanlage
DE3122155C2 (ja)
DE69224148T2 (de) Verfahren zum elektromagnetischen Führen beim stranggiessen
EP0145699B1 (de) Rühreinrichtung an einer Stranggiessanlage
DE3105636A1 (de) "einstellbare gleichspannungsversorgung"
DE2315970C2 (de) Parallelschwingkreisumrichter mit einer Glättungsdrossel im Gleichstromzwischenkreis
EP0028761B1 (de) Verfahren zum Umrühren beim Stranggiessen
EP1427553B1 (de) Verfahren sowie eine vorrichtung zur herstellung eines metallbandes an einer rollen-bandgiessmaschine
DE2328024C3 (de) Mittelfrequenz-Leistungstransformator mit einer zur starren Verbindung mit einem kühlmitteldurchflossenen Induktor geeigneten Sekundärwicklung
DE2003945C3 (de) Anlage zu Elektroschlackenumschmelzen von Metallen, insbesondere von Stählen
EP0585542A1 (de) Induktor
DE19954452A1 (de) Verfahren zur Einstellung der Kraftdichte beim induktiven Rühren und Fördern sowie Induktoren zum induktiven Rühren und Fördern elektrisch leitender Flüssigkeiten
DE293364C (ja)
DE1964684C3 (de) Einrichtung zum Transport von elektrisch leitenden nichtmagnetischen Körpern mittels eines laufenden magnetischen Feldes
DE3516940C3 (de) Lichtbogenofen mit Reaktanzschleife im Hochstromleiter
DE19632818C2 (de) Rotorspule für unipolare elektrische Maschinen
DE2918317C2 (de) Linearer Asynchronmotor
DE1959979A1 (de) Wanderfeldinduktor,insbesondere geeignet als Ruehrspule fuer Metallschmelzen
DE2730496C2 (de) Schaltungsanordnung für ein Paar von ebenen Wanderfeldinduktoren
AT207477B (de) Induktionsofen zum Erhitzen metallischer Werkstücke
EP4249146A1 (de) Elektromagnetische rühr- und bremseinrichtung für eine kokille zur erzeugung von metallbrammen

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