EP0603094B1 - Seitenwand für eine Zweirollenstranggiessanlage - Google Patents

Seitenwand für eine Zweirollenstranggiessanlage Download PDF

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Publication number
EP0603094B1
EP0603094B1 EP93470031A EP93470031A EP0603094B1 EP 0603094 B1 EP0603094 B1 EP 0603094B1 EP 93470031 A EP93470031 A EP 93470031A EP 93470031 A EP93470031 A EP 93470031A EP 0603094 B1 EP0603094 B1 EP 0603094B1
Authority
EP
European Patent Office
Prior art keywords
plate
wall according
notches
wall
rolls
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
EP93470031A
Other languages
English (en)
French (fr)
Other versions
EP0603094A1 (de
Inventor
Hugues Legrand
Jacques Barbe
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.)
Usinor Sacilor En Thyssen Stahl Ak SA
Original Assignee
Thyssen AG
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 AG, Thyssen Stahl AG, USINOR Sacilor SA filed Critical Thyssen AG
Publication of EP0603094A1 publication Critical patent/EP0603094A1/de
Application granted granted Critical
Publication of EP0603094B1 publication Critical patent/EP0603094B1/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
    • B22D11/06—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
    • B22D11/0648—Casting surfaces
    • B22D11/066—Side dams
    • 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 an installation for the continuous casting of metals between cylinders, and more particularly to a lateral closure wall of the casting space situated between the cylinders.
  • document JP-A-58 32 552 describes such a wall made of refractory material comprising a recess in which an electrical heating resistance is placed.
  • Document JP-A-62 124 051 describes a wall comprising a first plate in contact with the cast metal and a second support plate, comprising on the side of the first plate, grooves in which are placed heating means.
  • the recesses or grooves in which the heating means are placed weaken the mechanical resistance of this type of wall.
  • grooves involve machining the support plate.
  • the production of a recess in the refractory plate also involves machining or special molding which complicates the manufacture of the lateral closure wall.
  • the object of the present invention is to solve the above problems, and to propose a lateral obturation wall comprising electric heating means, which is of simple construction, has good resistance. mechanical and ensures the best possible heat transfer between the heating element and the refractory plate in contact with the cast metal.
  • the invention relates to a lateral closure wall for a continuous casting installation between cylinders of thin metal strips, comprising a first vertical plate of refractory material, placed in contact with the front ends of the cylinders, and means for electrically heating said first plate, characterized in that the heating means comprise a second rigid plate of electroconductive material, disposed against the first plate, and means for connecting two ends of this plate to a current source electric.
  • this second plate which serves as a heating resistance.
  • this second plate being rigid ensures increased mechanical strength of the lateral closure wall.
  • the thickness of this second plate may be sufficient for it in fact to constitute the essential means giving the mechanical resistance necessary for the closure wall.
  • the first refractory plate may have a reduced thickness since the forces to which the closure wall is subjected, are essentially supported by the second plate.
  • the second plate includes offset notches produced alternately from a first edge of the plate and a second edge opposite the first, perpendicular to the plate.
  • the notches can be made horizontally or vertically, and their spacing can vary from area to area. the other of the plate to locally adapt the quantity of thermal energy supplied.
  • an insulating material is placed in these notches.
  • the role of this insulator, for example mica sheets, is to avoid any contact between two parts of the plate located on either side of the same notch, and on the other hand to consolidate the second plate by strengthening its rigidity. .
  • the second plate can be made of graphite, or of an electroconductive refractory material in its mass, such as alloy magnesia.
  • the closure wall comprises an electrically insulating backplate for holding and pressing, in contact with the second plate, and on which pressure means act, to push the entire wall shutter against the cylinders.
  • the set of three plates is preferably placed in a box, which leaves the free face of the first refractory plate visible, supplied with an inert gas, such as nitrogen, to prevent oxidation of the electroconductive material.
  • an inert gas such as nitrogen
  • the installation for casting between rolls shown in FIG. 1 conventionally comprises two rolls 1, 2, with horizontal and parallel axes, delimiting between them a pouring space 3 for the molten metal fed according to arrow 4.
  • the pouring space is closed on each side, towards the ends of the cylinders by lateral closing walls 5.
  • the cast metal 6 solidifies on contact with the cooled walls of the cylinders 1, 2, driven in rotation according to the arrows 7, 8, and is extracted downwards, in the form of a thin metal strip 9.
  • the lateral closure wall 5, according to the invention, shown in FIGS. 2 and 3, comprises a first plate 11 made of refractory material, placed against the front ends of the cylinders 1, 2.
  • This first plate which must be heated, is made of an electrically insulating material, for example vitreous silica.
  • the second plate 12 is placed against the first plate 11.
  • the second plate 12 is made of electrically conductive material, for example graphite, and has a relatively large thickness, of several tens of millimeters, for example of the order of 20 mm, of so as to constitute a rigid solid block having good mechanical resistance in particular to compression and to bending.
  • the general shape of the second plate 12 is substantially trapezoidal, and corresponds substantially to the shape of a section of the casting space 3 in a vertical plane perpendicular to the axes of the cylinders.
  • Parallel notches 13 are made in the second plate 12, horizontally and over its entire thickness. These stepped notches are produced for example by a saw cut alternately from one 14 and the other 15 edge of the plate, so as to constitute a set of strips 20 superimposed and connected by their ends alternately on one edge and on the other of the plate 12, thus forming an electrical heating resistance, the ends 16, 17 of which are connected to a source of electricity 18.
  • the notches can be regularly spaced by a distance e .
  • a 25 mm thick graphite plate having a height of 300 mm for a surface of 300 cm2 was machined to make grooves 3 mm wide, spaced about 6 mm apart, forming thus a series of slats with a total length of 1885 mm and an average section of 150 mm2.
  • the dissipated power is of the order of 10 000 W.
  • An insulating material such as mica sheets 19 is placed in each notch 13 to avoid any risk of short circuit or arcing between two neighboring lamellae, and to reinforce the plate 12.
  • a third rear plate 21 is pressed against the second plate 12 by pressure means, such as springs 22, which also serve to press the whole of the lateral closure wall against the cylinders.
  • a box 23 surrounds the lateral closure wall 5 while being tightly connected to the first and third plates 11, 21.
  • This box is supplied by a conduit 24 with inert gas, for example nitrogen, intended to avoid the oxidation of graphite.
  • the invention is not limited to the arrangements described above by way of example.
  • the notches can be made vertically. Their spacing, and therefore the thickness e of the slats 20, may also vary so as to locally adapt the thermal energy supplied by the plate 12, for example to heat more strongly in the upper part of the lateral obturation wall than towards the bottom of it.
  • the first plate 1 may also be formed by a refractory lining of the second plate, produced by casting or projection of this material on said second plate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Support Devices For Sliding Doors (AREA)
  • Packaging Of Machine Parts And Wound Products (AREA)
  • Handcart (AREA)
  • Furnace Details (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Claims (9)

  1. Seitliche Verschlußwand (5) für eine Anlage zum Stranggießen dünner metallischer Bänder zwischen Walzen, mit einer ersten senkrechten Wand (11) aus feuerfestem Material, die die Stirnenden der Walzen (1, 2) berührt und mit einer elektrischen Heizanordnung für diese erste Platte, dadurch gekennzeichnet, daß die Heizanordnung eine zweite steife Platte (12) aus elektrisch leitendem Material aufweist, die an der ersten Platte anliegt sowie eine Anordnung zur Verbindung der beiden Enden (16, 17) dieser Platte mit einer elektrischen Stromquelle (18).
  2. Wand nach Anspruch 1, dadurch gekennzeichnet, daß die zweite Platte (12) zueinander versetzte Aussparungen (13) aufweist, die abwechselnd von einem ersten Rand (14) der Platte und einem zweiten diesem Rand gegenüberliegenden Rand (15) ausgehen und senkrecht zur Platte verlaufen.
  3. Wand nach Anspruch 2, dadurch gekennzeichnet, daß die Aussparungen (13) senkrecht verlaufen.
  4. Wand nach Anspruch 2, dadurch gekennzeichnet, daß der Abstand (e) zwischen den Aussparungen variabel ist.
  5. Wand nach Anspruch 2, dadurch gekennzeichnet, daß ein isolierendes Material (19) in den Aussparungen (13) angeordnet ist.
  6. Wand nach Anspruch 1, dadurch gekennzeichnet, daß das elektrisch leitende Material Graphit oder ein in seiner Gesamtheit elektrisch leitendes feuerfestes Material ist.
  7. Wand nach Ansprüchen 1 bis 6, dadurch gekennzeichnet, daß sie eine elektrisch isolierende rückwärtige Halte- und Druckplatte (21) aufweist, welche die zweite Platte (12) berührt und auf welche eine Druckanordnung (22) einwirkt, um die Gesamtheit der Verschlußwand in Richtung zu den Walzen hin zu beaufschlagen.
  8. Wand nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Gesamtheit der drei Platten vorteilhafterweise in einem Gehäuse (23) angeordnet ist, welches die Vorderseite der ersten feuerfesten, mit einem inerten Gas versorgten Platte (11) frei laßt.
  9. Stranggußanlage mit Walzen, dadurch gekennzeichnet, daß sie zwei seitliche Verschlußwände nach einem der Ansprüche 1 bis 8 aufweist.
EP93470031A 1992-12-18 1993-12-03 Seitenwand für eine Zweirollenstranggiessanlage Expired - Lifetime EP0603094B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9215573A FR2699437B1 (fr) 1992-12-18 1992-12-18 Paroi d'obturation latérale d'une installation de coulée continue entre cylindres.
FR9215573 1992-12-18

Publications (2)

Publication Number Publication Date
EP0603094A1 EP0603094A1 (de) 1994-06-22
EP0603094B1 true EP0603094B1 (de) 1995-08-23

Family

ID=9436999

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93470031A Expired - Lifetime EP0603094B1 (de) 1992-12-18 1993-12-03 Seitenwand für eine Zweirollenstranggiessanlage

Country Status (7)

Country Link
EP (1) EP0603094B1 (de)
AT (1) ATE126740T1 (de)
DE (2) DE69300397T2 (de)
DK (1) DK0603094T3 (de)
ES (1) ES2078112T3 (de)
FR (1) FR2699437B1 (de)
GR (1) GR3017477T3 (de)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2640861A (en) * 1950-11-27 1953-06-02 Harshaw Chem Corp Resistance furnace
GB1278411A (en) * 1968-03-11 1972-06-21 Johnson Matthey Co Ltd Improvements in and relating to heater elements
JPS5832552A (ja) * 1981-08-21 1983-02-25 Kawasaki Steel Corp 薄肉鋳片連続鋳造用鋳型
JPH0659527B2 (ja) * 1985-11-21 1994-08-10 三菱重工業株式会社 薄板連続鋳造装置
JPS63215343A (ja) * 1987-03-05 1988-09-07 Nisshin Steel Co Ltd 双ロ−ル式連続鋳造機
JPH02155543A (ja) * 1988-12-09 1990-06-14 Hitachi Ltd 薄鋳片の連続鋳造装置

Also Published As

Publication number Publication date
DE69300397D1 (de) 1995-09-28
FR2699437A1 (fr) 1994-06-24
DK0603094T3 (da) 1996-01-15
ATE126740T1 (de) 1995-09-15
EP0603094A1 (de) 1994-06-22
GR3017477T3 (en) 1995-12-31
DE69300397T2 (de) 1996-03-07
DE4343244A1 (de) 1994-06-23
ES2078112T3 (es) 1995-12-01
FR2699437B1 (fr) 1995-02-03

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