EP0728051A1 - Procede et dispositif de ralentissement du deplacement d'un bain de fusion lors d'un coulage dans un moule - Google Patents

Procede et dispositif de ralentissement du deplacement d'un bain de fusion lors d'un coulage dans un moule

Info

Publication number
EP0728051A1
EP0728051A1 EP95900962A EP95900962A EP0728051A1 EP 0728051 A1 EP0728051 A1 EP 0728051A1 EP 95900962 A EP95900962 A EP 95900962A EP 95900962 A EP95900962 A EP 95900962A EP 0728051 A1 EP0728051 A1 EP 0728051A1
Authority
EP
European Patent Office
Prior art keywords
melt
mould
copper plates
magnetic field
casting
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.)
Withdrawn
Application number
EP95900962A
Other languages
German (de)
English (en)
Inventor
Magnus HALLEFÄLT
Sten Kollberg
Anders Lehman
Göte Tallbäck
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.)
ABB AB
Original Assignee
Asea Brown Boveri AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asea Brown Boveri AB filed Critical Asea Brown Boveri AB
Publication of EP0728051A1 publication Critical patent/EP0728051A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B22D11/10—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 a method and a device for braking the flow of liquid metal, melt, in the non-solidified portions of a cast strand during continuous casting of metals.
  • the melt is braked by generating a static magnetic field adjacent to a mould used for forming the metal.
  • the liquid metal which moves in the magnetic field gives rise to induced currents in the melt, which together with the magnetic field give rise to a braking force.
  • One object of the invention is to suggest a method and a device for obtaining an even braking of the melt along the whole width of the mould, and to prevent the occurrence of unbraked flow channels along the short sides of the mould.
  • the invention relates to a method and a device for braking the movement of a melt in non-solidified portions of a cast strand during casting of metal.
  • Melt flows into a mould which comprises four copper plates which form a casting mould, open in the direction of casting, with a substantially rectangular cross section.
  • a static or periodic low-frequency magnetic field is generated across the path of the inflowing melt, whereby electric currents are induced in the melt.
  • two opposite copper plates are electrically insulated from each other, and the induced currents are returned via an external return conductor which is connected between the insulated copper plates.
  • the induced currents, together with the magnetic field, give rise to a force which acts in such a direction that the movement of the melt is braked.
  • Figures 2a-2d schematically show a device for casting of molten metal according to the invention.
  • the return conductor 13 comprises an external current source 15.
  • the induced currents in the melt increase, which increases the braking force.
  • Figures 2c and 2d show the induced currents in the melt.
  • the force which the induced currents produce is directed upwards, against the flow direction of the melt, along the whole width of the mould ( Figure 2d) .
  • the unbraked flow channels along the short sides of the mould disappear because of the upwardly-directed braking forces 14.
  • Figure 2b shows the flow of the melt in a device according to the invention.

Landscapes

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

Abstract

L'invention concerne un procédé et un dispositif de ralentissement du déplacement d'un bain de fusion dans les parties non solidifiées d'une ligne de coulée continue au cours du coulage de métal. Le bain de fusion s'écoule dans un moule qui comprend quatre plaques en cuivre (2, 3) formant un moule de fonte s'ouvrant vers le bas de section relativement rectangulaire. Un champ magnétique basse fréquence statique ou périodique (5) est généré dans le chemin de coulée entrant du bain de fusion, de sorte que des courants électriques sont induits dans ce dernier. Deux plaques en cuivre opposées (2) sont isolées électriquement l'une de l'autre, et les courants induits sont renvoyés par un conducteur de retour externe (13) connecté entre les deux plaques isolées (2). Les courants induits conjointement avec le champ magnétique donnent naissance à une force agissant dans une certaine direction de manière à ralentir le déplacement du bain de fusion sur toute la largeur du moule.
EP95900962A 1993-11-10 1994-10-25 Procede et dispositif de ralentissement du deplacement d'un bain de fusion lors d'un coulage dans un moule Withdrawn EP0728051A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9303699A SE501935C2 (sv) 1993-11-10 1993-11-10 Sätt och anordning för att bromsa en smältas rörelse vid gjutning i kokill
SE9303699 1993-11-10
PCT/SE1994/001000 WO1995013154A1 (fr) 1993-11-10 1994-10-25 Procede et dispositif de ralentissement du deplacement d'un bain de fusion lors d'un coulage dans un moule

Publications (1)

Publication Number Publication Date
EP0728051A1 true EP0728051A1 (fr) 1996-08-28

Family

ID=20391693

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95900962A Withdrawn EP0728051A1 (fr) 1993-11-10 1994-10-25 Procede et dispositif de ralentissement du deplacement d'un bain de fusion lors d'un coulage dans un moule

Country Status (6)

Country Link
EP (1) EP0728051A1 (fr)
JP (1) JPH09504999A (fr)
CN (1) CN1134678A (fr)
AU (1) AU1036995A (fr)
SE (1) SE501935C2 (fr)
WO (1) WO1995013154A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4402500C2 (de) * 1994-01-28 1995-12-21 Aeg Elotherm Gmbh Gießkokille
IT1288901B1 (it) * 1996-05-13 1998-09-25 Danieli Off Mecc Procedimento di colata continua con campo magnetico pulsante e relativo cristallizzatore per colata continua

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE443307B (sv) * 1982-04-16 1986-02-24 Asea Ab Strenggjutningskokill
US5570736A (en) * 1991-09-25 1996-11-05 Kawasaki Steel Corporation Process of continuously casting steel using electromagnetic field

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9513154A1 *

Also Published As

Publication number Publication date
JPH09504999A (ja) 1997-05-20
AU1036995A (en) 1995-05-29
WO1995013154A1 (fr) 1995-05-18
SE9303699D0 (sv) 1993-11-10
CN1134678A (zh) 1996-10-30
SE501935C2 (sv) 1995-06-26
SE9303699L (sv) 1995-05-11

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