EP0040383B1 - Verfahren und Vorrichtung zur Umrührung in einem Giessstrang - Google Patents

Verfahren und Vorrichtung zur Umrührung in einem Giessstrang Download PDF

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Publication number
EP0040383B1
EP0040383B1 EP81103569A EP81103569A EP0040383B1 EP 0040383 B1 EP0040383 B1 EP 0040383B1 EP 81103569 A EP81103569 A EP 81103569A EP 81103569 A EP81103569 A EP 81103569A EP 0040383 B1 EP0040383 B1 EP 0040383B1
Authority
EP
European Patent Office
Prior art keywords
pouring
ingot mould
stream
fields
pouring stream
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
EP81103569A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0040383A1 (de
Inventor
Sten Dipl.-Ing. Kollberg
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 Norden Holding AB
Original Assignee
ASEA 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 AB filed Critical ASEA AB
Publication of EP0040383A1 publication Critical patent/EP0040383A1/de
Priority to ES511019A priority Critical patent/ES8303148A3/es
Application granted granted Critical
Publication of EP0040383B1 publication Critical patent/EP0040383B1/de
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
    • B22D11/10—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 invention relates to a method for stirring in a casting strand according to the preamble of claim 1 and an apparatus for performing the method.
  • the invention has for its object to develop a method and implementation arrangement by which the difficulties outlined above are eliminated.
  • beat which according to the invention in the kenn. drawing part of claim 1 said features.
  • a device for performing the method is characterized by the features mentioned in claim 7.
  • a static magnetic field with a large penetration depth is thus generated and the high speed of the steel in the pouring jet is used when penetrating into the melt in the mold (penetration speed).
  • This penetration speed is on the order of 1 to 1.5 m / sec.
  • the movement of the steel is slowed down by the magnetic field and the pouring jet splinters.
  • the mode of operation is comparable to an eddy current brake.
  • the depth of penetration is reduced and most of the slag is deposited on the surface and no longer gets stuck on the inside of the strand shell that has already solidified.
  • the static magnetic field can also be generated by one or more permanent magnets.
  • a simple and effective device for “stirring” in the mold is thus obtained, the slag being separated off without getting caught in the blank.
  • the poles (the area of attack of the field) are arranged at an acute angle to the pouring jet in such a way that the pouring jet essentially splinters upwards. This prevents slag from being pressed down in the pouring direction, where it can get caught.
  • more heat is added to the surface in the mold, especially on the pouring tube.
  • the impulse exerted by the pouring jet on the melt in the mold is reduced and its effect is spread out from the point of entry into the melt in such a way that the stream of the pouring jet does not hit the narrow side of the blank, which causes a slag accumulation at the edge of the blank and one Shell erosion can be reduced.
  • the invention therefore makes it possible to also produce steel with a high surface quality in terms of slag purity.
  • Figure 1 shows how a pouring stream over a pouring tube 1 from a casting box or not shown another melt container comes.
  • the pouring tube has a downward double drain, and the impulse is directed to the narrow side of the mold 4, where slag settles in the strand shell. There is also a risk of slag penetration further down in the pouring direction (arrows 5).
  • FIG. 2 shows the penetration with pouring jets directed upwards from a pouring tube 8, indicated by the arrows 9.
  • FIG. 3 shows how the pouring jets 10 coming from a pouring tube 11 are directed in the melt and are broken up, whereby slag particles are more easily separated on the surface.
  • the stirring can also be carried out by conventional multi-phase stirrers supplied with alternating current, which are mounted behind the mold in (on) or in the casting direction, in order to also obtain the usual stirring effects during continuous casting.
  • the pouring stream can also be broken up and influenced if it is poured into the melt from a pouring box rather than through a pouring tube.
  • FIGS. 4 and 5 The device according to the invention is illustrated in FIGS. 4 and 5, where a static magnetic field B from a stirrer in the form of an iron core 15 carrying coils 16 'supplied with direct current is shown.
  • the field can be directed inward to the left of the pouring tube 18, which has a double drain, and outward to the right of the pouring tube.
  • the splitting of the pouring jets 16 and 17 takes place in the manner indicated by arrows in FIG. 3, and the slag only settles to a small extent on the narrow sides of the mold and further down in the pouring direction.
  • the device for carrying out the method can be equipped with one or more controllable DC stirrers. It can also contain one or more multi-phase AC stirrers, which are arranged on the mold or in the casting direction behind the mold, with their stirring direction being oriented perpendicularly or in the longitudinal direction to the casting direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP81103569A 1980-05-19 1981-05-11 Verfahren und Vorrichtung zur Umrührung in einem Giessstrang Expired EP0040383B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES511019A ES8303148A3 (es) 1980-05-19 1982-03-31 Metodo y su correspondiente dispositivo para agitar las regiones no solidificadas de una barra de acero fundido.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8003695 1980-05-19
SE8003695A SE436251B (sv) 1980-05-19 1980-05-19 Sett och anordning for omrorning av de icke stelnade partierna av en gjutstreng

Publications (2)

Publication Number Publication Date
EP0040383A1 EP0040383A1 (de) 1981-11-25
EP0040383B1 true EP0040383B1 (de) 1983-10-12

Family

ID=20340983

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81103569A Expired EP0040383B1 (de) 1980-05-19 1981-05-11 Verfahren und Vorrichtung zur Umrührung in einem Giessstrang

Country Status (7)

Country Link
US (1) US4495984A (sv)
EP (1) EP0040383B1 (sv)
JP (1) JPS5717356A (sv)
BR (1) BR8103058A (sv)
CA (1) CA1178779A (sv)
DE (1) DE3161171D1 (sv)
SE (1) SE436251B (sv)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3134220B1 (de) 2014-04-25 2019-09-04 ThyssenKrupp Steel Europe AG Verfahren und vorrichtung zum dunnbrammenstranggiessen

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5853669A (ja) * 1981-09-28 1983-03-30 Hitachi Ltd 内燃機関用燃料噴射ポンプ装置
SE8202431L (sv) * 1982-04-19 1983-10-20 Asea Ab Omroring i gjutstreng
FR2530511B1 (fr) * 1982-07-23 1985-07-05 Cegedur Procede de coulee de metaux dans lequel on fait agir des champs magnetiques
FR2530510B1 (fr) * 1982-07-23 1985-07-05 Cegedur Procede de coulee electromagnetique de metaux dans lequel on fait agir au moins un champ magnetique different du champ de confinement
JPS5976647A (ja) * 1982-10-22 1984-05-01 Kawasaki Steel Corp 連続鋳造における鋳込み溶鋼の撹拌方法および装置
SE459401B (sv) * 1986-10-20 1989-07-03 Asea Ab Saett och anordning foer bromsning och/eller omroerning av de icke stelnade partierna av en gjutstraeng
JPS63260652A (ja) * 1987-04-20 1988-10-27 Kawasaki Steel Corp 連続鋳造におけるモ−ルドパウダ−の巻き込み防止方法
US4824078A (en) * 1987-08-19 1989-04-25 Massachusetts Institute Of Technology Magnetic streamlining and flow control in tundishes
US4949778A (en) * 1987-12-16 1990-08-21 Kawasaki Steel Corporation Immersion nozzle for continuous casting
KR930002836B1 (ko) * 1989-04-27 1993-04-10 가와사끼 세이데쓰 가부시까가이샤 정자장을 이용한 강철의 연속 주조방법
CA2011410C (en) * 1990-03-02 1996-12-31 Mikio Suzuki Method for continuous casting of steel
DE69217515T2 (de) * 1991-06-05 1997-06-05 Kawasaki Steel Co Stranggiessen von Stahl
CA2059030C (en) * 1992-01-08 1998-11-17 Jun Kubota Method for continuous casting of slab
WO1995026243A1 (fr) * 1994-03-29 1995-10-05 Nippon Steel Corporation Procede de commande de flux dans un moule de coulee a l'aide d'un champ magnetique cc
US5540672A (en) * 1994-06-13 1996-07-30 Kimberly-Clark Corporation Absorbent article having dual asymmetric leg elastics
SE503562C2 (sv) * 1995-02-22 1996-07-08 Asea Brown Boveri Sätt och anordning för stränggjutning
GB2312861B (en) * 1996-05-08 1999-08-04 Keith Richard Whittington Valves
DE19625932A1 (de) * 1996-06-28 1998-01-08 Schloemann Siemag Ag Elektromagnetische Bremse für eine Stranggießkokille
EP0832704A1 (en) 1996-09-19 1998-04-01 Hoogovens Staal B.V. Continuous casting machine
SE509112C2 (sv) 1997-04-18 1998-12-07 Asea Brown Boveri Anordning vid kontinuerlig gjutning av två ämnen i parallell
SE9703170D0 (sv) * 1997-09-03 1997-09-03 Asea Brown Boveri Förfarande och anordning för att styra metallflödet i en kokill för stränggjutning genom att applicera elektromagnetiska fält i ett flertal nivåer
FR2772294B1 (fr) * 1997-12-17 2000-03-03 Rotelec Sa Equipement de freinage electromagnetique d'un metal en fusion dans une installation de coulee continue
KR100376504B1 (ko) 1998-08-04 2004-12-14 주식회사 포스코 연속주조방법및이에이용되는연속주조장치
KR101213559B1 (ko) * 2004-12-22 2012-12-18 겐조 다카하시 교반장치 및 방법과, 그 교반장치를 이용한 교반장치 부착용해로
DE102009029889A1 (de) * 2008-07-15 2010-02-18 Sms Siemag Ag Elektromagnetische Bremseinrichtung an Stranggießkokillen

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA531772A (en) * 1956-10-16 Continuous Metalcast Co. Method and apparatus for the continuous casting of metal
US3153820A (en) * 1961-10-09 1964-10-27 Charles B Criner Apparatus for improving metal structure
DE1962341B2 (de) * 1969-12-12 1971-06-24 Aeg Elotherm Gmbh Anordnung einer mehrphasigen elektromagnetischen wicklung am strangfuehrungsgeruest einer stranggiessanlage
US3693697A (en) * 1970-08-20 1972-09-26 Republic Steel Corp Controlled solidification of case structures by controlled circulating flow of molten metal in the solidifying ingot
US3842895A (en) * 1972-01-10 1974-10-22 Massachusetts Inst Technology Metal alloy casting process to reduce microsegregation and macrosegregation in casting
FR2187465A1 (en) * 1972-06-08 1974-01-18 Siderurgie Fse Inst Rech Continuously casting metal melts - with reduced amount of inclusions, has molten metal introduced below melt surface
US4200137A (en) * 1975-04-22 1980-04-29 Republic Steel Corporation Process and apparatus for the continuous casting of metal using electromagnetic stirring
SE410153B (sv) * 1976-05-21 1979-10-01 Asea Ab Anleggning vid strenggjutning
FR2358222A1 (fr) * 1976-07-13 1978-02-10 Siderurgie Fse Inst Rech Nouveaux procede et dispositif pour le brassage electromagnetique de produits metalliques coules en continu
FR2391015A1 (fr) * 1977-05-18 1978-12-15 Siderurgie Fse Inst Rech Perfectionnement au procede de coulee continue centrifuge de produits metalliques et dispositif de mise en oeuvre
JPS5419377A (en) * 1977-07-14 1979-02-14 Sharp Corp Production of semiconductor device
US4158380A (en) * 1978-02-27 1979-06-19 Sumitomo Metal Industries Limited Continuously casting machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3134220B1 (de) 2014-04-25 2019-09-04 ThyssenKrupp Steel Europe AG Verfahren und vorrichtung zum dunnbrammenstranggiessen

Also Published As

Publication number Publication date
EP0040383A1 (de) 1981-11-25
BR8103058A (pt) 1982-02-09
CA1178779A (en) 1984-12-04
SE436251B (sv) 1984-11-26
DE3161171D1 (en) 1983-11-17
US4495984A (en) 1985-01-29
JPH0220349B2 (sv) 1990-05-09
SE8003695L (sv) 1981-11-20
JPS5717356A (en) 1982-01-29

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