WO2006031964A1 - Procedes et installations de suppression des tourbillons apparaissant dans des paniers repartiteurs ou des poches de coulee pendant leur dechargement respectif - Google Patents

Procedes et installations de suppression des tourbillons apparaissant dans des paniers repartiteurs ou des poches de coulee pendant leur dechargement respectif Download PDF

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Publication number
WO2006031964A1
WO2006031964A1 PCT/US2005/032922 US2005032922W WO2006031964A1 WO 2006031964 A1 WO2006031964 A1 WO 2006031964A1 US 2005032922 W US2005032922 W US 2005032922W WO 2006031964 A1 WO2006031964 A1 WO 2006031964A1
Authority
WO
WIPO (PCT)
Prior art keywords
rmf
melt
inductor
tundish
frequency
Prior art date
Application number
PCT/US2005/032922
Other languages
English (en)
Inventor
Irving I Dardick
Arkady K. Kapusta
Boris M. Mikhailovich
Ephim G. Golbraikh
Shaul L. Lesin
Herman D. Branover
Michael Khavkin
Original Assignee
Energetics Technologies, L.L.C.
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 Energetics Technologies, L.L.C. filed Critical Energetics Technologies, L.L.C.
Priority to EP05795170A priority Critical patent/EP1791665A1/fr
Priority to BRPI0515178-3A priority patent/BRPI0515178A/pt
Priority to CA002580166A priority patent/CA2580166A1/fr
Priority to JP2007531477A priority patent/JP2008513214A/ja
Publication of WO2006031964A1 publication Critical patent/WO2006031964A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
    • B22D43/001—Retaining slag during pouring molten metal
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/08—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like for bottom pouring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/507—Pouring-nozzles giving a rotating motion to the issuing molten metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/62—Pouring-nozzles with stirring or vibrating means
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4653—Tapholes; Opening or plugging thereof

Definitions

  • the present invention relates generally to vortex suppression in tundishes.
  • a proposed method of vortex suppression of the invention uses a rotating magnetic field ("RMF") .
  • RMF rotating magnetic field
  • This method does not involve the arrangement of any ceramic components inside the tundish and therefore is free from the above-mentioned drawbacks.
  • the parameters of RMF are easy to change and, hence, the process of vortex suppression using RMF can be easily controlled within broad limits.
  • a method of suppressing a vortex arising in a tundish or ladle at the lowering .of the free surface of a melt below a critical level using a rotating magnetic field continuously excited by m- phase current (i.e., any suitable number of current phases or m-phase voltage) in the melt above an outflow pipe, wherein the direction of RMF rotation is opposite to the direction of melt rotation in the vortex.
  • m- phase current i.e., any suitable number of current phases or m-phase voltage
  • FIG. 1 shows a vertical cross-section of a portion of a tundish adjacent to a discharge hole with an RMF inductor, in accordance with the invention
  • FIG. 2 shows a horizontal cross-section of a three-phase RMF inductor with six explicit poles, taken from line A-A of FIG. 1;
  • FIG. 3 shows the configuration of pole pieces of a two-phase inductor with four explicit poles, in accordance with the invention
  • FIG. 4 shows the configuration of pole pieces of a three-phase inductor with three explicit poles, in accordance with the invention
  • FIG. 5 schematically illustrates induced current oscillations in the inductor windings, in accordance with the present invention
  • FIG. 6 shows a schematic diagram of a tundish used during experiments on vortex suppression
  • FIG. 7 shows the results of experiments conducted on the tundish of FIG. 6.
  • a tundish cover 1 (FIG. 1) , inspection window 2 is made, and above this window 2, optical probe 3 may be mounted, which records the displacement of melt surface 4.
  • m-phase voltage may be applied to inductor 6 (FIG. 2) .
  • RMF is excited above discharge hole 5, which induces a rotating system of currents in the melt .
  • Interaction of these currents with the RMF generates electromagnetic body forces (“EMBF”) that can either hinder or accelerate vortex formation above discharge hole 5, depending on the way of switching on inductor 6.
  • EMBF electromagnetic body forces
  • sinusoidal waveforms of current are generated in an inductor (e.g., inductor 6) of the type described herein such that RMF is excited above discharge hole 5.
  • inductor 6 e.g., inductor 6
  • superwaves may be generated and applied to inductor 6 when its windings are connected to a power supply (not shown) .
  • FIG. 5 schematically illustrates the formation of doubly-modulated sinusoidal current oscillations (two-level SuperWaves) .
  • FIG. 5 illustrates low-frequency carrier wave 110 modulated, for example, by waves 120 and 130. Minor waves 120 and 130 have progressively higher frequencies (compared to major wave 110) . Other modulation levels of even higher frequency may modulate major wave 110, but are not shown for clarity. This superwave is depicted in the time-domain in FIG. 5.
  • the delay +t varied from 0 to 2 seconds, I 0 varied from 8A to 13A. Apparently, the greatest effect is observed at the maximal current in the absence of delay. It is noteworthy that in this case, maximal disturbance of the metal surface in the tundish is observed.
  • the inductor may be made with 4 (items 7 in FIG. 3) , 8, etc. poles; in the case of three-phase current, the inductor may be made with 3 (items 8 in FIG. 4) , 6 (items 9 in FIG. 2) , etc. poles) .
  • These poles may be located around the outflow pipe 10 (FIG. 1) .
  • the magnetic circuit of inductor 6 preferably consists of ferromagnetic back 11 with explicit poles 9, 12 (FIG. 2) and coils 13 arranged on them (FIG. 1) .
  • the magnetic circuit may preferably be made of sheet electrotechnical steel or in the form of thin-sheet jacket' 14 (FIG. 2) , preferably filled with iron powder 15 (FIG. 1) whose particles are electrically insulated.
  • the magnetic circuit may preferably be cast from steel or cast iron.
  • Pole pieces 16 (FIG. 1) , 7 (FIG. 3) , 8 (FIG.
  • the inductor may preferably be fixed to tundish jacket 17 using flange 20, which may preferably be made of nonmagnetic steel rigidly connected with the poles of the magnetic circuit .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Continuous Casting (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

L'invention concerne un procédé permettant de supprimer un tourbillon apparaissant dans un panier répartiteur ou une poche de coulée lorsque la surface libre de la masse en fusion passe en-deçà d'un niveau critique, à l'aide d'un champ magnétique rotatif excité dans la masse en fusion au-dessus d'un conduit de décharge par un inducteur RMF de conception spéciale.
PCT/US2005/032922 2004-09-13 2005-09-13 Procedes et installations de suppression des tourbillons apparaissant dans des paniers repartiteurs ou des poches de coulee pendant leur dechargement respectif WO2006031964A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP05795170A EP1791665A1 (fr) 2004-09-13 2005-09-13 Procedes et installations de suppression des tourbillons apparaissant dans des paniers repartiteurs ou des poches de coulee pendant leur dechargement respectif
BRPI0515178-3A BRPI0515178A (pt) 2004-09-13 2005-09-13 métodos e instalações para suprimir vórtices que surgem em panelas intermediárias ou cacos durante sua descarga respectiva
CA002580166A CA2580166A1 (fr) 2004-09-13 2005-09-13 Procedes et installations de suppression des tourbillons apparaissant dans des paniers repartiteurs ou des poches de coulee pendant leur dechargement respectif
JP2007531477A JP2008513214A (ja) 2004-09-13 2005-09-13 タンディッシュまたはとりべのそれぞれの排出の間に、タンディッシュまたはとりべにおいて生じる渦を抑制するための方法および設備

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US60969704P 2004-09-13 2004-09-13
US60/609,697 2004-09-13

Publications (1)

Publication Number Publication Date
WO2006031964A1 true WO2006031964A1 (fr) 2006-03-23

Family

ID=35351640

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/032922 WO2006031964A1 (fr) 2004-09-13 2005-09-13 Procedes et installations de suppression des tourbillons apparaissant dans des paniers repartiteurs ou des poches de coulee pendant leur dechargement respectif

Country Status (8)

Country Link
US (1) US20060131795A1 (fr)
EP (1) EP1791665A1 (fr)
JP (1) JP2008513214A (fr)
KR (1) KR20070052343A (fr)
CN (1) CN101039768A (fr)
BR (1) BRPI0515178A (fr)
CA (1) CA2580166A1 (fr)
WO (1) WO2006031964A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2140956A1 (fr) * 2008-07-04 2010-01-06 hofmann CERAMIC GmbH Dispositif de coulée pour fontes métalliques
US9360255B2 (en) 2011-08-29 2016-06-07 Abb Research Ltd. Method and arrangement for vortex reduction in a metal making process

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117680666B (zh) * 2024-02-04 2024-04-05 湖南中科电气股份有限公司 一种通道式感应加热中间包的涡流防护系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2443892A1 (fr) * 1978-12-13 1980-07-11 Siderurgie Fse Inst Rech Recipient metallurgique de coulee
US5382003A (en) * 1992-12-08 1995-01-17 Sankaranarayanan; Ramani Flow control device for the suppression of vortices
JPH09295109A (ja) * 1996-04-30 1997-11-18 Nippon Steel Corp 清浄溶湯の連続鋳造法
EP0847819A1 (fr) * 1996-12-11 1998-06-17 Didier-Werke Ag Procédé pour la régulation de la température et pour l'égalisation du profil de température d'une barre métallique en fusion
WO2001036130A1 (fr) * 1999-11-12 2001-05-25 Elotherm Gmbh Procedes pour ajuster l'intensite des forces intervenant lors du brassage et du refoulement par induction et inducteurs utilises pour le brassage et le refoulement par induction de liquides electroconducteurs
EP1277531A2 (fr) * 2001-07-05 2003-01-22 Centre de Recherches Metallurgiques - Centrum voor de Research in de Metallurgie Procédé et dispositif de coulée d'un lingot métallique
FR2856321A1 (fr) * 2003-06-17 2004-12-24 Usinor Installation de coulee continue pour une mise en rotation electro-magnetique du metal liquide en transit dans la busette de coulee

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56154267A (en) * 1980-05-01 1981-11-28 Kawasaki Steel Corp Method for suppressing vortex of molten steel in tundish in continuous casting
JPH0428460A (ja) * 1990-05-24 1992-01-31 Kawasaki Steel Corp 溶融金属渦流の防止装置とその防止方法
JPH04224056A (ja) * 1990-12-25 1992-08-13 Kawasaki Steel Corp 連続鋳造用溶鋼保持容器
US7350559B2 (en) * 2002-12-16 2008-04-01 Energetics Technologies, Llc Systems and methods of electromagnetic influence on electroconducting continuum

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2443892A1 (fr) * 1978-12-13 1980-07-11 Siderurgie Fse Inst Rech Recipient metallurgique de coulee
US5382003A (en) * 1992-12-08 1995-01-17 Sankaranarayanan; Ramani Flow control device for the suppression of vortices
JPH09295109A (ja) * 1996-04-30 1997-11-18 Nippon Steel Corp 清浄溶湯の連続鋳造法
EP0847819A1 (fr) * 1996-12-11 1998-06-17 Didier-Werke Ag Procédé pour la régulation de la température et pour l'égalisation du profil de température d'une barre métallique en fusion
WO2001036130A1 (fr) * 1999-11-12 2001-05-25 Elotherm Gmbh Procedes pour ajuster l'intensite des forces intervenant lors du brassage et du refoulement par induction et inducteurs utilises pour le brassage et le refoulement par induction de liquides electroconducteurs
EP1277531A2 (fr) * 2001-07-05 2003-01-22 Centre de Recherches Metallurgiques - Centrum voor de Research in de Metallurgie Procédé et dispositif de coulée d'un lingot métallique
FR2856321A1 (fr) * 2003-06-17 2004-12-24 Usinor Installation de coulee continue pour une mise en rotation electro-magnetique du metal liquide en transit dans la busette de coulee

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 03 27 February 1998 (1998-02-27) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2140956A1 (fr) * 2008-07-04 2010-01-06 hofmann CERAMIC GmbH Dispositif de coulée pour fontes métalliques
US9360255B2 (en) 2011-08-29 2016-06-07 Abb Research Ltd. Method and arrangement for vortex reduction in a metal making process

Also Published As

Publication number Publication date
US20060131795A1 (en) 2006-06-22
CA2580166A1 (fr) 2006-03-23
JP2008513214A (ja) 2008-05-01
KR20070052343A (ko) 2007-05-21
CN101039768A (zh) 2007-09-19
BRPI0515178A (pt) 2008-07-08
EP1791665A1 (fr) 2007-06-06

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