EP0015870B1 - Coquille électromagnétique pour la coulée continue - Google Patents

Coquille électromagnétique pour la coulée continue Download PDF

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Publication number
EP0015870B1
EP0015870B1 EP80810055A EP80810055A EP0015870B1 EP 0015870 B1 EP0015870 B1 EP 0015870B1 EP 80810055 A EP80810055 A EP 80810055A EP 80810055 A EP80810055 A EP 80810055A EP 0015870 B1 EP0015870 B1 EP 0015870B1
Authority
EP
European Patent Office
Prior art keywords
deflecting
coolant
section
casting
mould according
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
EP80810055A
Other languages
German (de)
English (en)
Other versions
EP0015870A1 (fr
Inventor
Walter Haller
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.)
Alcan Holdings Switzerland AG
Original Assignee
Schweizerische Aluminium AG
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 Schweizerische Aluminium AG filed Critical Schweizerische Aluminium AG
Priority to AT80810055T priority Critical patent/ATE1134T1/de
Publication of EP0015870A1 publication Critical patent/EP0015870A1/fr
Application granted granted Critical
Publication of EP0015870B1 publication Critical patent/EP0015870B1/fr
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
    • B22D11/01—Continuous casting of metals, i.e. casting in indefinite lengths without moulds, e.g. on molten surfaces
    • B22D11/015—Continuous casting of metals, i.e. casting in indefinite lengths without moulds, e.g. on molten surfaces using magnetic field for conformation, i.e. the metal is not in contact with a mould

Definitions

  • the invention relates to an electromagnetic continuous casting mold with a support body for an induction coil and a cooling device which has at least one cooling nozzle directed towards the surface of the casting strand for a liquid coolant.
  • the surface quality of the product depends crucially on the level at which the liquid coolant used hits the surface of the casting strand that solidifies during lowering. From DE-A-2202910 it is known to pass the liquid coolant through a slot as a cooling nozzle to the casting strand. From this cooling nozzle, the coolant emerges in an oblique jet to the surface of the casting strand and strikes it at an angle to its main axis or to the casting direction, which - like the so-called impact height - remains the same for all casting processes; the fixed inclination of that slit also determines the final beam direction.
  • the inventor set himself the task of creating a continuous casting mold of the type mentioned at the outset, which effortlessly permits fine regulation of the angle of incidence between the coolant jet and the casting strand surface - and this independently of the electromagnetic field of the continuous casting mold which may need correction.
  • a differentiation of the impact area over the strand sides, which increases the cooling effect should be made possible.
  • the nozzle opening (s) designed as a ring gap is followed by a deflection profile in the flow direction of the coolant, which projects into the path of the coolant jet emerging from the annular gap with a curved or exchangeable baffle surface inclined towards the casting direction.
  • the radial cross section of the deflection profile or the support can be given the shape of a suitable curve segment (for example a parabola segment), as a result of which the coolant jet also takes the form of such a curve and the device is opened up to constructive applications which are not possible with a linear or level coolant jet given are.
  • a suitable curve segment for example a parabola segment
  • the deflection profile and the support consist of an electrically insulating plastic, preferably a glass fiber reinforced epoxy plastic, in order not to influence the magnetic field. It is also within the scope of the invention to form a deflection profile and / or support by means of a metallic hollow profile.
  • k d nn be expedient, the impact area particularly for large-sized, rectangular cross-sections - to change the cast strand such that the points of intersection between coolant film and the cast strand does not lie in a horizontal plane - and thus the angle of incidence .
  • the baffle surface of each side is to be designed such that, seen in the view, it represents a curvature with a central apex.
  • the casting strand is cooled at its corners later - that is, further down and at a smaller angle, preferably less than 20 ° - than in the center of the individual side faces.
  • an induction coil 1 formed in the exemplary embodiments shown by a hollow profile, is placed around a casting opening for a casting strand 10.
  • This is preferably made of an insulating material Plastic, molded multi-part support body 2, 3 mounted, which has corresponding recesses for receiving the induction coil 1 on its inside.
  • the upper support body 3 is connected to a metallic cover 4 and delimits cavities for a flowing coolant.
  • An electromagnetic shield which is connected to the cover 4 by a screw thread, is used to adapt the magnetic field to the increasing metallostatic pressure in the casting strand 10, and a selected position of the shield 5 can be fixed by locking screws 6.
  • this screen 5 is preceded by a jacket 7 made of refractory, insulating material towards the pouring opening.
  • an insulating body 8 is attached, which together with the outer surface of the electromagnetic screen 5 forms an annular gap 13 through which coolant is sprayed onto the casting strand 10.
  • the coolant is introduced into the cavity formed by the upper support body 3 and its cover 4, then flows through various fluid dynamic calming elements - for example reproduced sieve plates 9 with holes 11 - and a collar-like weir 12 and then passes through the annular gap 13 at a predetermined angle to the axis M of the casting strand 10, which is given by the function of the screen 5 for adapting the magnetic field to the metallostatic pressure in the casting strand.
  • a deflection profit 15 protrudes into the flow path of the coolant jet 14 emerging from the annular gap 13, one surface of which represents a deflecting element as a baffle or impact surface for the coolant jet. Its angle of inclination to the casting strand axis M is determined by the deflection of the coolant jet 14 to be achieved, its inner contour is adapted to the cross-sectional contour of the casting strand 10. This deflection profile 15 is inserted into the corresponding shoulders or recesses 16 of the induction coil 1 or of the / the support body (s) 2, 3 in the sliding fit.
  • the deflection profile 15 can be secured against rotation about the axis M by arranging tongue and groove between the induction coil 1 or support body 2, 3 on the one hand and deflection profile 15 on the other hand; alternatively, the deflection profile 15 - especially if it is made of a thin metal sheet - can be anchored between the top of the induction coil 1 on the one hand and the supporting body 3 or insulating body 8 on the other.
  • the sequence of the individual steps when assembling the device also changes in accordance with the different embodiments: if the deflection profile 15 rests on the lower support body 2, these two pieces 15, 2 are first assembled and then the induction coil 1 is attached. However, if the deflection profile 15 is provided in the induction coil 1 itself, the support bodies 2, 3 are first joined together with it, only then is the deflection profile 15 fitted.
  • the deflection profile 15 is anchored between the induction coil 1 and the support body 3, then that is first fitted onto the upper edge of the induction coil 1 and fixed by the subsequent attachment of the support body 3 and the insulating support 8.
  • the shape of the cross section of the deflection profile 15 is in itself predetermined by its function. 2 depends on the type of material selected in the individual case and the prevailing geometrical conditions in the continuous casting installation used.
  • a particularly rapid change in the point of impact of the coolant jet 14 on the casting strand 10 in accordance with the changing operational tasks can be achieved in that the deflecting profile 15 itself does not deflect the coolant jet 14, but rather a support 17 offering the baffle surface, which serves the deflecting profile 15 only as a base.
  • the geometry of this support 17 can then be selected differently accordingly. In this case, not only flat pieces but also curve segments - as shown in FIG. 3 - can be used, thereby opening up additional possible uses for the device.
  • the angle between the coolant jet 14 and the surface of the casting strand 10 to be cooled expediently varies between 8 and 50 °. When casting aluminum and its alloys in an alternating field of 2 to 3 kHz and a lowering speed of the casting strand 10 of 7 cm / min, angles between 15 and 30 ° have been found to be optimal.
  • the deflection profile 15 of each of the device sides according to FIGS is bent towards the side ends 21 in the casting direction.
  • the materials for the deflection profile 15 or the support 17 are primarily electrically insulating materials which have a temperature resistance and a thermal expansion coefficient which is comparable to that of the induction coil 1 or the support body 2, 3 on which the deflection profile 15 sits in individual cases.
  • electrically insulating materials which have a temperature resistance and a thermal expansion coefficient which is comparable to that of the induction coil 1 or the support body 2, 3 on which the deflection profile 15 sits in individual cases.
  • Glass fiber reinforced epoxy plastics with low hygroscopic properties have been proven. If 15 metallic materials are used for the deflection profile, the electromagnetic alternating field may be disturbed by them as little as possible. This requirement can either be met by a deflection profile 15 in a hollow metallic construction or by a deflection profile 15 in which only the support 17 consists of a thin metallic sheet.
  • the deflection profile 15 can be of different cross-section in the different embodiments; so z. B. in an embodiment, not shown, a profiled sheet as a deflection profile 15 clamped on the one hand between the support body 3 and induction coil 1 and protrudes to form the inclined baffle towards the casting strand 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
  • Rehabilitation Tools (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Claims (7)

1. Lingotière de coulée continue électromagnétique, comprenant un support (2, 3) pour une bobine d'induction (1) et un dispositif de refroidissement présentant au moins une tuyère de refroidissement (13) dirigée vers la surface de la barre coulée pour un fluide de refroidissement liquide, caractérisée en ce que l'ouverture ou les ouvertures de tuyère, sous forme d'une fente annulaire (13), est ou sont suivie(s), dans le sens de l'écoulement du fluide de refroidissement, par un profilé déviateur (15) qui pénètre dans la trajectoire du jet de fluide de refroidissement (14) issu de la fente annulaire par une surface déflectrice courbe ou inclinée sur la direction de coulée, qui est interchangeable.
2. Lingotière selon la revendication 1, caractérisée en ce que le profilé déviateur (15) est disposé coulissant dans un évidement (16) de la bobine d'induction et/ou du support (2).
3. Lingotière selon la revendication 1, caractérisée en ce que la surface déflectrice pour le fluide de refroidissement est formée par un garnissage (17) interchangeable disposé sur le profilé déviateur (15).
4. Lingotière selon l'une des revendications 1 à 3, caractérisée en ce que la section radiale de la surface déflectrice du jet de fluide de refroidissement (14) représente un segment courbe, de préférence une partie d'une parabole.
5. Lingotière selon les revendications 1-et 3, caractérisée en ce que le profilé déviateur (15) et le garnissage (17) sont en une matière synthétique électriquement isolante, de préférence en une résine époxyde armée de fibres de verre.
6. Lingotière selon les revendications 1 et 3, caractérisée en ce que le profilé déviateur (15) et/ou garnissage (17) sont formés par un profilé métallique creux.
7. Lingotière selon au moins l'une des revendications 1 à 6, caractérisée en ce que, dans le cas d'une lingotière de coulée continue de section rectangulaire, la surface déflectrice de chaque côté forme, vue en élévation, un renflement avec un sommet (20) au milieu.
EP80810055A 1979-03-07 1980-02-15 Coquille électromagnétique pour la coulée continue Expired EP0015870B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80810055T ATE1134T1 (de) 1979-03-07 1980-02-15 Elektromagnetische stranggiesskokille.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2202/79 1979-03-07
CH220279 1979-03-07

Publications (2)

Publication Number Publication Date
EP0015870A1 EP0015870A1 (fr) 1980-09-17
EP0015870B1 true EP0015870B1 (fr) 1982-06-02

Family

ID=4228273

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80810055A Expired EP0015870B1 (fr) 1979-03-07 1980-02-15 Coquille électromagnétique pour la coulée continue

Country Status (11)

Country Link
US (1) US4307772A (fr)
EP (1) EP0015870B1 (fr)
JP (1) JPS55122653A (fr)
AT (1) ATE1134T1 (fr)
CA (1) CA1153533A (fr)
CS (1) CS221967B2 (fr)
DE (1) DE2914246C2 (fr)
NO (1) NO154950C (fr)
PL (1) PL222506A1 (fr)
YU (1) YU61880A (fr)
ZA (1) ZA801038B (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4530394A (en) * 1979-07-11 1985-07-23 Olin Corporation Controlled water application for electromagnetic casting shape control
ZA821828B (en) * 1981-04-02 1983-02-23 Alusuisse Process for cooling a continuously cast ingot during casting
US4446867A (en) * 1981-12-31 1984-05-08 Leveen Robert F Fluid-driven balloon catheter for intima fracture
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
US4512386A (en) * 1982-11-12 1985-04-23 Swiss Aluminium Ltd. Adjustable mold for electromagnetic casting
FR2599650B2 (fr) * 1985-07-30 1988-08-26 Pechiney Aluminium Dispositif de coulee en charge de metaux
AU589704B2 (en) * 1985-11-25 1989-10-19 Swiss Aluminium Ltd. Device and process for the continuous casting of metals
US4759748A (en) * 1986-06-30 1988-07-26 Raychem Corporation Guiding catheter
US4796689A (en) * 1987-03-23 1989-01-10 Swiss Aluminium Ltd. Mold for electromagnetic continuous casting
JPS63242443A (ja) * 1987-03-31 1988-10-07 Sumitomo Light Metal Ind Ltd 電磁場鋳造装置
JPH01128944U (fr) * 1988-02-24 1989-09-01
CH688129A5 (de) * 1992-10-06 1997-05-30 Alusuisse Lonza Services Ag Giessmaschine fuer das vertikale Stranggiessen in einem Magnetfeld.
US6491087B1 (en) 2000-05-15 2002-12-10 Ravindra V. Tilak Direct chill casting mold system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU350321A1 (ru) * 1971-04-27 1977-12-05 Белокалитвинский металлургический завод Многолучьевой электромагнитный кристаллизатор
US3741280A (en) * 1971-11-03 1973-06-26 G Safaroy Mould for the production of metal ingots
FR2324397B1 (fr) * 1975-09-19 1979-06-15 Siderurgie Fse Inst Rech Procede et dispositif pour le brassage electromagnetique des produits de coulee continue
IT1113478B (it) * 1978-02-13 1986-01-20 Olin Corp Procedimento ed apparecchio per la fusine di rame e leghe di rame
CA1123897A (fr) * 1978-07-03 1982-05-18 John C. Yarwood Methode et dispositif de coulee par voie electromagnetique

Also Published As

Publication number Publication date
ZA801038B (en) 1981-03-25
PL222506A1 (fr) 1980-12-01
EP0015870A1 (fr) 1980-09-17
NO800629L (no) 1980-09-08
ATE1134T1 (de) 1982-06-15
CA1153533A (fr) 1983-09-13
DE2914246C2 (de) 1981-11-12
US4307772A (en) 1981-12-29
NO154950C (no) 1987-01-21
JPH029899B2 (fr) 1990-03-05
CS221967B2 (en) 1983-04-29
DE2914246B1 (de) 1980-07-24
NO154950B (no) 1986-10-13
JPS55122653A (en) 1980-09-20
YU61880A (en) 1983-02-28

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