EP0593383B1 - Dispositif de coulée continue entre cylindres de produits métalliques minces - Google Patents

Dispositif de coulée continue entre cylindres de produits métalliques minces Download PDF

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Publication number
EP0593383B1
EP0593383B1 EP93470026A EP93470026A EP0593383B1 EP 0593383 B1 EP0593383 B1 EP 0593383B1 EP 93470026 A EP93470026 A EP 93470026A EP 93470026 A EP93470026 A EP 93470026A EP 0593383 B1 EP0593383 B1 EP 0593383B1
Authority
EP
European Patent Office
Prior art keywords
walls
fixed walls
conductive elements
rolls
elements
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
EP93470026A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0593383A1 (fr
Inventor
Jean-Michel Damasse
Jean-Marie Galpin
Gérard Raisson
Hans Litterscheidt
Roland Sellger
Dieter Senk
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.)
Thyssen Stahl AG
USINOR SA
Original Assignee
Thyssen Stahl AG
USINOR Sacilor 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
Application filed by Thyssen Stahl AG, USINOR Sacilor SA filed Critical Thyssen Stahl AG
Publication of EP0593383A1 publication Critical patent/EP0593383A1/fr
Application granted granted Critical
Publication of EP0593383B1 publication Critical patent/EP0593383B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/0665—Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating
    • B22D11/0671—Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating for heating or drying

Definitions

  • the present invention relates to a continuous casting device between cylinders of thin metallic products, in particular steel according to the preamble of claim 1.
  • Known devices for continuous casting between cylinders comprise two cooled cylinders, with parallel axes, driven in opposite directions, and fixed walls cooperating with the cylinders to define with them a liquid metal casting space.
  • Such fixed walls are commonly used to laterally seal the casting space towards the front ends of the cylinders, and to seal it; they are commonly called “lateral closing walls” or "small faces”.
  • Certain devices such as that described in document FR-A-2 651 455 also include a kind of fixed riser, of generally rectangular shape, consisting of two longitudinal walls parallel to the axes of the cylinders and in sealed contact with them, and two front walls extending upwards or forming an integral part of the lateral closure walls.
  • This enhancement also called a "flyweight" in the aforementioned document and in the following description, has the particular function of delimiting the surface of the cylinder on which the solidification of the cast metal takes place, and thus ensuring the regularity of this solidification, whatever the level of the metal in the counterweight.
  • the meniscus of liquid metal is no longer in contact with the cylinders, the risk of entrainment of impurities floating on the meniscus is thus considerably reduced.
  • the cast metal is subjected to heat losses on contact with the fixed walls.
  • the purpose of the present invention is to provide a solution to the problems mentioned above, to avoid freezing and catching of the metal cast on the fixed walls, and thus to facilitate casting and improve the quality of the product obtained.
  • the invention relates to a continuous casting device between cylinders of thin metal products comprising two cylinders with parallel axes, cooled and driven in rotation, fixed walls of refractory material cooperating with said cylinders to define with them a liquid metal pouring space and heating inductors placed near the fixed walls.
  • the device is characterized in that it comprises elements made of conductive material electricity, embedded in said fixed walls of electrically insulating material and that the inductors are arranged so as to heat said elements by induction.
  • the invention it is possible to locate the heating in the areas of the fixed walls where said elements are placed, and in particular thanks to the diffusion of heat in these, in wall areas, and therefore of the cast metal. which is nearby, which could not be heated directly by induction.
  • the inductors can be further from the casting space and the thickness of the walls increased compared to direct inductive heating according to the prior art.
  • the mechanical resistance of the fixed walls is thereby improved, all the more since said elements can be made of a mechanically more resistant material than the refractory component of the walls.
  • said fixed walls constitute lateral closing walls of the casting space.
  • said fixed walls constitute a counterweight in which the conductive elements can in particular be placed at the level of the level provided for the cast metal, and thus locate the heating in the meniscus area, or in the corners of the counterweight, to compensate for the increase in thermal losses in these areas.
  • the set of fixed walls 5, 7, 8 defines, with the walls of the cylinders 1, 2, a casting space 9, in which the molten metal 10 is poured during casting, by a casting nozzle of known type and not shown.
  • the metal, solidified in contact with the cylinders, is continuously extracted downwards in the form of a strip 11.
  • Elements made up of angles 12 of electrically conductive material are embedded in the counterweight 6, at the four corners of the latter and extend vertically above and below the level of the free surface of the liquid metal.
  • the walls 7, 8 are made of a thermally and electrically insulating refractory material.
  • the angles 12 are made of metal with a high melting point or of an electrically conductive refractory material, such as silicon carbide.
  • Heating inductors 14 are placed outside the counterweight 6, and arranged so as to heat the angles 12 by induction.
  • these inductors 14 have a "C" shape and are placed at the corners of the counterweight, so that their pole surfaces 16, 18 are respectively opposite the wings 20, 22 of the angles 12 To avoid overloading FIG. 1, a single inductor 14 has been shown there.
  • inductors can be used, insofar as they allow inductive heating of the angles 12.
  • the latter are preferably inserted in grooves of corresponding dimensions made in the corners of the counterweight.
  • the angles can also be embedded in the refractory walls during the manufacture of the counterweight by molding.
  • angles heated by induction are brought to high temperature and, by conduction, heat the cast metal located in the corners of the casting space, or at least limit the heat losses.
  • An inductor 32 of the "pancake” type that is to say wound in a flat spiral, is placed opposite the plate 30 to heat by induction the conductive plate 26, which will heat by conduction through the plate 28, the cast metal .
  • the hard refractory plate 28 is intended to avoid direct contact of the cast metal with the conductive plate 26.
  • the insulating refractory plate 30 is intended to prevent heat transfers from the cast metal and from the conductive plate 26 to the outside, and also to avoid excessive heating of the inductor 32.
  • FIGS. 5 and 6 a variant of the invention is shown, for heating the cast metal at its free surface, over the entire periphery of the casting space.
  • the counterweight 6 comprises, embedded in its walls, a metal belt 34 extending over the entire periphery of the counterweight.
  • This belt 34 is formed of a wire mesh embedded in the refractory of the counterweight during its manufacture by molding and serving as a reinforcement reinforcing its mechanical resistance.
  • the belt 34 is heated by induction by an inductor 36, for example wound in several turns surrounding the weight at the height of the belt 34.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • General Induction Heating (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Rolls And Other Rotary Bodies (AREA)
EP93470026A 1992-10-16 1993-10-08 Dispositif de coulée continue entre cylindres de produits métalliques minces Expired - Lifetime EP0593383B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9212627 1992-10-16
FR9212627A FR2696960B1 (fr) 1992-10-16 1992-10-16 Dispositif de coulée continue entre cylindres de produits métalliques minces.

Publications (2)

Publication Number Publication Date
EP0593383A1 EP0593383A1 (fr) 1994-04-20
EP0593383B1 true EP0593383B1 (fr) 1997-03-12

Family

ID=9434761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93470026A Expired - Lifetime EP0593383B1 (fr) 1992-10-16 1993-10-08 Dispositif de coulée continue entre cylindres de produits métalliques minces

Country Status (7)

Country Link
EP (1) EP0593383B1 (da)
AT (1) ATE149893T1 (da)
DE (2) DE69308719T2 (da)
DK (1) DK0593383T3 (da)
ES (1) ES2100508T3 (da)
FR (1) FR2696960B1 (da)
GR (1) GR3022814T3 (da)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4238036A1 (de) * 1992-11-11 1994-05-19 Didier Werke Ag Einrichtung zum endabmessungsnahen Gießen
DE19515230C2 (de) * 1995-04-28 1997-06-19 Didier Werke Ag Verfahren zum induktiven Aufheizen eines feuerfesten Formteils sowie ein entsprechendes Formteil
AUPN980296A0 (en) * 1996-05-13 1996-06-06 Bhp Steel (Jla) Pty Limited Strip casting
FR2787361B1 (fr) * 1998-12-22 2001-02-02 Usinor Face laterale d'obturation de l'espace de coulee d'une installation de coulee de bandes minces metalliques

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1525154A (fr) * 1966-03-11 1968-05-17 Perfectionnements aux busettes de coulée pour la coulée continue de métal ou d'acier ordinaire à l'état liquide
JPS6277156A (ja) * 1985-09-30 1987-04-09 Nippon Steel Corp 双ロ−ル型連続鋳造装置
FR2609914B1 (fr) * 1987-01-26 1990-04-13 Aubert & Duval Acieries Busette composite de coulee de metal liquide, notamment pour appareil d'atomisation du metal
JPH02155543A (ja) * 1988-12-09 1990-06-14 Hitachi Ltd 薄鋳片の連続鋳造装置
FR2651455B1 (fr) * 1989-09-06 1992-05-22 Siderurgie Fse Inst Rech Dispositif de coulee continue de produits metalliques minces entre cylindres.
DE4125916A1 (de) * 1991-08-05 1993-02-11 Didier Werke Ag Verfahren zum induktiven aufheizen von keramischen formteilen

Also Published As

Publication number Publication date
DK0593383T3 (da) 1997-09-08
DE4335263A1 (de) 1994-04-21
DE69308719T2 (de) 1997-09-11
FR2696960A1 (fr) 1994-04-22
ATE149893T1 (de) 1997-03-15
DE69308719D1 (de) 1997-04-17
EP0593383A1 (fr) 1994-04-20
GR3022814T3 (en) 1997-06-30
FR2696960B1 (fr) 1994-11-25
ES2100508T3 (es) 1997-06-16

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