EP0778098B1 - Elektromagnetische Rühreinrichtung für das Stranggiessen - Google Patents

Elektromagnetische Rühreinrichtung für das Stranggiessen Download PDF

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Publication number
EP0778098B1
EP0778098B1 EP97100231A EP97100231A EP0778098B1 EP 0778098 B1 EP0778098 B1 EP 0778098B1 EP 97100231 A EP97100231 A EP 97100231A EP 97100231 A EP97100231 A EP 97100231A EP 0778098 B1 EP0778098 B1 EP 0778098B1
Authority
EP
European Patent Office
Prior art keywords
ingot mould
tube
inductor
mould tube
unit
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 - Lifetime
Application number
EP97100231A
Other languages
English (en)
French (fr)
Other versions
EP0778098A3 (de
EP0778098A2 (de
Inventor
Norbert Kaell
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.)
SMS Siemag AG
Original Assignee
Paul Wurth SA
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
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Application filed by Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP0778098A2 publication Critical patent/EP0778098A2/de
Publication of EP0778098A3 publication Critical patent/EP0778098A3/de
Application granted granted Critical
Publication of EP0778098B1 publication Critical patent/EP0778098B1/de
Anticipated expiration legal-status Critical
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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
    • 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 an ingot mold with electromagnetic stirring device of an installation continuous casting comprising a mold tube vertical receiving molten metal, as well as an inductor electro-magnetic to generate a gyratory movement of the molten metal in the mold tube around the axis of it.
  • a device of this kind is known from the document EP-A-0093068.
  • the open casting process or in free jet is simply to let the metal flow liquid in the mold tube through a nozzle calibrated at a more or less constant flow.
  • the level of meniscus of steel in ingot mold is controlled by a adaptation of the extraction speed as a function of the extraction and according to the indication of an installation of level measurement based on a radioactive principle.
  • This process is basically used for casting medium quality steel billets, because the casting is performed in contact with air.
  • a airtight casting process which is casting with submerged nozzles and powders.
  • the steel liquid is introduced into the mold tube through a nozzle which plunges into the liquid metal which is into the mold tube.
  • Contact with air and oxygen is prevented by a layer of powder which covers the surface of the metal at the pouring meniscus.
  • the casting is done at extraction speed constant.
  • the level of the ingot mold steel is controlled by a buffer or a distributor drawer.
  • the inductor is in the upper region of the ingot mold tube, while for the casting with submerged nozzle, it is preferable that the inductor is arranged at a lower level. It's here reason why, to take full advantage of advantages offered by electromagnetic stirring in ingot mold, it is better to have two different facilities to implement each of two casting processes.
  • Document DE-A-3819493 describes an ingot mold with electromagnetic stirring device that would allow the implementation of the two continuous casting processes.
  • This ingot mold includes an inductor which is adjusted like a piston in a separate compartment from the cooling of the mold, so as to be essentially movable in height by the fluid of pressure cooling.
  • This ingot mold has only present never known of industrial application.
  • Document GB-A-2021459 essentially concerns the correction of an offset between the central axis of the inductor electromagnetic and the casting axis, when works with interchangeable mold tubes which have different cross sections.
  • the problem underlying the present invention was to develop a simple ingot mold for the implementation of the flow continues in free jet and the flow continues to submerged nozzle.
  • the tube ingot mold is surrounded by a first coaxial steel tube which, in turn, is arranged inside a second tube coaxial around which the inductor is mounted, while the annular spaces between the two tubes and between the tube ingot mold and the first tube are crossed by a liquid cooling.
  • the ingot mold which consists of the ingot mold tube, of the inductor and the two tubes can be integral with a set of underlying rollers which can be dismantled in block with this one.
  • Figures 1 and 2 show an ingot mold 10 contained in a metal case 12.
  • the mold 10 has essentially a vertical ingot mold tube 14 containing liquid metal 16 which is poured out of a non tundish represented.
  • the molten metal 16 solidifies gradually in this mold tube and the blank metallic is extracted there by passing through a set 18 of underlying guide and formation rollers metallic blanks.
  • the set of rollers 18 is integral with the ingot mold 10 and can be disassembled as a block therewith.
  • the ingot mold tube 14 which is generally consists of a copper tube, is surrounded by a tube coaxial steel 20 which forms with the mold tube a annular cylindrical space 22 in which a coolant for the ingot mold tube 14.
  • a another cylindrical space 24 is delimited around the tube 20 by a second tube 26. This space 24 is closed downwards by an annular plate 28 fixed to the two tubes 20 and 26.
  • the cooling water enters the circuit in 30 and then in the annular gap 22 between the tube ingot mold 14 and tube 20.
  • This space is very thin for ensure rapid circulation and cooling effective in the ingot mold tube 14.
  • the water from cooling thus goes up along the tube of ingot mold to overflow through the top of the tube 20 and fill the annular space 24.
  • the cooling water leaves this space 24 by overflow in a pipe vertical not shown arranged along the wall inside of the tube 26 and then through a exit.
  • the electromagnetic device 32 can be consisting of one or more inductors.
  • the inductor 32 is not fixed, but can be moved vertically between an elevated position according to FIG. 1 for jet casting free and a lower position according to FIG. 2 for the casting with submerged nozzle.
  • the means of movement of inductor 32 can be constituted by any means suitable known per se, for example three threaded rods which support the inductor 32 and which can be rotated synchronously by a suitable motor.
  • inductor 32 slides vertically in several, by example three guide rods 50, the vertical operation achieved by a crane not shown.
  • the rods 50 are designed to position the inductor 32 in three vertical positions different defined by three radial perforations upper 52 and two lower notches 54.
  • the inductor 32 rests on the bottom of the mold 10 and can be keyed by the lower perforation 52. If the embodiment illustrated allows a third intermediate position, not shown, it is, of course, possible to predict than two or plan more.
  • the inductor 32 can also include a circuit for separate cooling, which is symbolized by arrows 34 and 36 for the inlet and outlet of water from cooling.
  • the meniscus level of the liquid metal in the ingot mold tube (14) can be monitored.
  • This monitoring is carried out at using a radiation source 38, for example a source cobalt, arranged in the upper region of space annular 24 and which is associated with a scintillometer 40 disposed on the opposite side of the mold tube 14.
  • this radiation source 38 is inside a cylindrical protective jacket 42, as shown more in detail and enlarged in Figure 3.
  • This shirt protection 42 which can, for example, be made of lead, has a vertical slot 44 for the passage of the rays.
  • This protective shirt 42 can be turned around a vertical axis between an operating position shown in FIG.

Claims (8)

  1. Kokille einer Stranggußanlage
    mit
    einer Kokillenröhre (14) zur Aufnahme eines geschmolzenen Metalls (16);
    einem Kühlkreislauf, der die Kokillenröhre (14) umgibt, um sie zu kühlen;
    einem elektromagnetischen Induktor (32) zur Erzeugung einer Drehbewegung des geschmolzenen Metalls (16) in der Kokillenröhre (14) um deren Achse,
    wobei dieser elektromagnetische Induktor (32) gegenüber der Kokillenröhre (14) senkrecht verstellbar ist; sowie einem Kühlkreislauf (34, 36) für den elektromagnetischen Induktor (32);
    dadurch gekennzeichnet, daß
    der Induktor (32) mit seinem Kühlkreislauf (34, 36) und die Kokillenröhre mit ihrem Kühlkreislauf zwei getrennte Einheiten bilden, wobei die Induktoreneinheit so um die Kokillenröhreneinheit montiert ist, daß sie als ganzes in Achsrichtung an der Kokillenröhreneinheit entlang verschoben werden kann.
  2. Kokille nach Anspruch 1, dadurch gekennzeichnet, daß der die Kokillenröhre (14) umgebende Kühlkreislauf besteht aus:
    einer inneren Röhre (20), die die Kokillenröhre (14) umgibt und mit ihr zusammen einen ersten ringförmigen Raum (22) bildet, der einen ersten Durchgangsquerschnitt für eine Kühlflüssigkeit beschreibt,
    einer äußeren Röhre (26), die diese innere Röhre (20) umgibt, und mit ihr zusammen einen zweiten ringförmigen Raum (24) bildet, der einen zweiten Durchgangsquerschnitt für eine Kühlflüssigkeit beschreibt, wobei der erste Durchgangsquerschnitt bedeutend kleiner ist als dieser zweite Durchgangsquerschnitt.
  3. Kokille nach Anspruch 2, dadurch gekennzeichnet, daß sie in einem Stück mit einem Satz darunterliegender Rollen (18) vorliegt und mit diesem komplett ausbaubar ist.
  4. Kokille nach jedem einzelnen der Ansprüche 1 bis 3, gekennzeichnet durch senkrechte Führungsstangen (50), die die Induktoreneinheit gegenüber der Kokillenröhre in Achsrichtung führen.
  5. Kokille nach Anspruch 5, gekennzeichnet durch Mittel, um die Induktoreneinheit (32) auf diesen senkrechten Führungsstangen (50) in unterschiedlichen, vorher festgelegten senkrechten Stellungen festzuhalten.
  6. Kokille nach jedem einzelnen der Ansprüche 1 bis 3, gekennzeichnet durch senkrechte Gewindestangen, die die Induktoreneinheit (32) tragen.
  7. Kokille nach Anspruch 6, dadurch gekennzeichnet, daß die senkrechten Gewindestangen an einen Motor angeschlossen sind, so daß sie synchron gedreht werden können.
  8. Methode zur Höhenverstellung der Induktoreneinheit (32) einer Kokille nach irgend einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß
    ein Kran verwendet wird, um die Induktoreneinheit (32) auf Führungsstangen (50) senkrecht an der Kokillenröhre (14) entlang zu verschieben,
    sowie dadurch, daß mechanische Mittel verwendet werden, um die Induktoreneinheit (32) auf diesen Führungsstangen (50) in unterschiedlichen, vorher festgelegten senkrechten Stellungen festzuhalten.
EP97100231A 1991-04-03 1992-02-21 Elektromagnetische Rühreinrichtung für das Stranggiessen Expired - Lifetime EP0778098B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
LU87914 1991-04-03
LU87914A LU87914A1 (fr) 1991-04-03 1991-04-03 Dispositif de brassage electromagnetique en lingotiere
EP92102888A EP0511465B2 (de) 1991-04-03 1992-02-21 Elektromagnetische Rühreinrichtung für das Stranggiessen

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP92102888.2 Division 1992-02-21
EP92102888A Division EP0511465B2 (de) 1991-04-03 1992-02-21 Elektromagnetische Rühreinrichtung für das Stranggiessen

Publications (3)

Publication Number Publication Date
EP0778098A2 EP0778098A2 (de) 1997-06-11
EP0778098A3 EP0778098A3 (de) 1997-10-08
EP0778098B1 true EP0778098B1 (de) 1998-09-30

Family

ID=19731286

Family Applications (2)

Application Number Title Priority Date Filing Date
EP97100231A Expired - Lifetime EP0778098B1 (de) 1991-04-03 1992-02-21 Elektromagnetische Rühreinrichtung für das Stranggiessen
EP92102888A Expired - Lifetime EP0511465B2 (de) 1991-04-03 1992-02-21 Elektromagnetische Rühreinrichtung für das Stranggiessen

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP92102888A Expired - Lifetime EP0511465B2 (de) 1991-04-03 1992-02-21 Elektromagnetische Rühreinrichtung für das Stranggiessen

Country Status (6)

Country Link
EP (2) EP0778098B1 (de)
AT (2) ATE171656T1 (de)
CA (1) CA2040830C (de)
DE (2) DE69227206T2 (de)
ES (2) ES2108054T5 (de)
LU (1) LU87914A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1288900B1 (it) * 1996-05-13 1998-09-25 Danieli Off Mecc Procedimento di colata continua con campo magnetico pulsante e relativo dispositivo
FR2893868B1 (fr) * 2005-11-28 2008-01-04 Rotelec Sa Reglage du mode de brassage electromagnetique sur la hauteur d'une lingotiere de coulee continue
CN105964988B (zh) * 2016-03-19 2019-04-02 上海大学 移动型脉冲磁致振荡细化金属凝固组织方法
CN109746404B (zh) * 2019-03-08 2021-05-18 石家庄爱迪尔电气有限公司 一种便于维护和加工的电磁搅拌铸造设备

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT185038B (de) * 1951-03-16 1956-03-26 Boehler & Co Ag Geb Verfahren zur Kühlung von Stranggußkokillen
US3153820A (en) * 1961-10-09 1964-10-27 Charles B Criner Apparatus for improving metal structure
DE1290303B (de) † 1964-08-22 1969-03-06 Schloemann Ag Vorrichtung zum Messen des Fuellstandes von Schmelze in einer Stranggiesskokille
LU79721A1 (fr) 1978-05-26 1979-12-06 Arbed Perfectionnement aux installations de coulee continue electrorotative
JPS5719141A (en) * 1980-07-09 1982-02-01 Mitsubishi Heavy Ind Ltd Electromagnetic stirring device of continuous casting facility
FR2502996A1 (fr) * 1981-04-03 1982-10-08 Rotelec Sa Inducteur electromagnetique a champ tournant et equipement de lingotiere de coulee continue des metaux pour son utilisation
LU84103A1 (fr) 1982-04-22 1984-03-02 Arbed Systeme de decrassage automatique de busettes pendant la coulee de metaux
SE441502B (sv) * 1984-03-19 1985-10-14 Asea Ab Nivametare vid kokiller for strenggjutning
IT1181219B (it) * 1984-09-17 1987-09-23 Danieli Off Mecc Colata continua con agitatori polifunzionali
JPS6360056A (ja) † 1986-08-29 1988-03-16 Nisshin Steel Co Ltd Ｔｉ含有ステンレス鋼の連続鋳造方法および連続鋳造用鋳型
DE3730300A1 (de) † 1987-09-10 1989-03-23 Aeg Elotherm Gmbh Verfahren und vorrichtung zum elektromagnetischen ruehren von metallschmelzen in einer stranggiesskokille
DE3819493A1 (de) 1988-06-08 1989-12-14 Voest Alpine Ind Anlagen Knueppel- bzw. vorblock-stranggiesskokille
JPH0351954U (de) † 1989-09-20 1991-05-21
GB9003196D0 (en) * 1990-02-13 1990-04-11 Davy Mckee Sheffield Continuous casting

Also Published As

Publication number Publication date
ATE171656T1 (de) 1998-10-15
EP0511465A3 (en) 1993-04-21
DE69222348T3 (de) 2004-07-22
EP0511465A2 (de) 1992-11-04
ES2108054T3 (es) 1997-12-16
CA2040830A1 (en) 1992-10-04
DE69222348T2 (de) 1998-02-26
DE69227206D1 (de) 1998-11-05
EP0778098A3 (de) 1997-10-08
ATE158525T1 (de) 1997-10-15
EP0511465B1 (de) 1997-09-24
EP0778098A2 (de) 1997-06-11
DE69222348D1 (de) 1997-10-30
ES2123347T3 (es) 1999-01-01
EP0511465B2 (de) 2003-12-03
ES2108054T5 (es) 2004-07-01
CA2040830C (en) 2003-08-19
LU87914A1 (fr) 1992-11-16
DE69227206T2 (de) 1999-04-15

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