EP0435800A1 - Verfahren zum Einleiten von flüssigem Metall auf eine Walze beim Strangguss und Verfahren zu seiner Durchführung - Google Patents

Verfahren zum Einleiten von flüssigem Metall auf eine Walze beim Strangguss und Verfahren zu seiner Durchführung Download PDF

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Publication number
EP0435800A1
EP0435800A1 EP90470071A EP90470071A EP0435800A1 EP 0435800 A1 EP0435800 A1 EP 0435800A1 EP 90470071 A EP90470071 A EP 90470071A EP 90470071 A EP90470071 A EP 90470071A EP 0435800 A1 EP0435800 A1 EP 0435800A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
box
casting
metal
attack
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.)
Withdrawn
Application number
EP90470071A
Other languages
English (en)
French (fr)
Inventor
Jean-Luc Jacquot
Laurent Sosin
Jean-Marie Osswald
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 SA
Original Assignee
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 USINOR Sacilor SA filed Critical USINOR Sacilor SA
Publication of EP0435800A1 publication Critical patent/EP0435800A1/de
Withdrawn legal-status Critical Current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
    • B22D11/064—Accessories therefor for supplying molten metal

Definitions

  • the present invention relates to a method and a device for continuously casting molten metal, in particular steel, onto a cylinder.
  • These devices essentially comprise a cylinder with a horizontal axis rotating around its axis and provided with means for energetic cooling of its external wall.
  • This cylinder receives the liquid metal from a box which has an inclined front wall whose surface of the casting cylinder licks the free upper edge through which the molten metal tends to spill.
  • This box cylinder cooperation takes place in a contiguous manner to prevent any leakage of liquid metal between them.
  • the cylinder is therefore supplied upstream of its upper generator relative to the direction of flow of the product. Due to the roughness and the rotation of the cylinder, the liquid metal is deposited thereon and under the effect of the rotation, is entrained out of the bath to leave the cylinder when its cooling is sufficient.
  • the solidified thickness of the metal when it leaves the cylinder, obviously depends on the duration of contact with the cylinder, and on the efficiency of the cooling carried out.
  • the molten metal which adheres to the cold wall of the cylinder, must first go up to this upper generator before going down again a little bit and leave the surface of the cylinder. It turns out that, in certain cases, the roughness of the cylinder alone becomes insufficient to entrain the product, at the start of casting.
  • the angle of attack that is to say the angle at the center of the cylinder intercepting the arc located between the point where the cast metal comes into contact with the cylinder and the horizontal , may be relatively small. The value of this angle, it is understood, varies like the length of the arc of contact of the metal cast with the cylinder, an arc which, for a given rotation speed of the cylinder determines a duration of contact, therefore the thickness of the product. .
  • the subject of the present invention is a process for continuous casting on a cooled cylinder rotating around its horizontal axis, which makes it possible to work with small angles of attack even when the roughness of the cylinder is not sufficient to start casting at these low values of the angle of attack.
  • the invention even makes it possible to work with negative angles of attack.
  • the method according to the invention is notably remarkable in that the initiation of the continuous casting is carried out with a high angle of attack, greater than 45 ° and preferably even of the order of 60 °, and in that , when the casting is started, the box is moved so as to reduce the angle of attack.
  • the invention provides for starting the casting with a large angle of attack and gradually reducing the latter when the casting is well started, that is to say when the free end of the cast product. exceeded the upper generator of the roller.
  • the box can then be lowered along the cylinder to reach the optimal value of the angle of attack.
  • the invention also relates to a continuous casting device for implementing the above method.
  • this axis of rotation is the axis of the cylinder itself.
  • a cylinder 1 of continuous casting which has internal means (not shown) for cooling its external wall.
  • This cylinder is rotated in the direction of arrow 2. It is supplied with liquid metal in its part located upstream of its upper generatrix 3 relative to the direction of rotation, by means of a box 4 filled with liquid metal.
  • This box 4 is supplied with liquid metal by means of a nozzle (not shown) plunging into the liquid metal, the free surface of which is marked at 6.
  • the liquid metal leaves the box via the lowered upper edge 11 of the front wall 5 which is licked the cooled surface of the casting cylinder, leaving only a small functional clearance to prevent leaks of molten metal from occurring by gravity at their junction.
  • the layer 7 of liquid metal which clings to the cylinder rises firstly with the latter to exceed the upper generatrix 3 while solidifying, it then continues descending with the cylinder 1 and leaves the latter when this layer is sufficiently solidified so as to produce a thin plate 8 of the metal considered.
  • this layer 7 does not manage to rise to the upper generator 3 due to the gravity which tends to oppose the attachment of the layer 7.
  • the priming is carried out for a sufficiently large angle of attack A to ensure the priming of the layer 7 even if the state of the surface of the cylinder does not have a significant roughness.
  • the layer 7 formed has passed the upper generatrix 3 and begins to descend on the other side, there is a transient phase during which the angle of attack is passed from the maximum angle of attack of ignition at the normal operating angle of attack B, of the order of 30 °, which is determined in particular as a function of the length necessary for the contact arc.
  • the angle of attack A at initiation is 60 ° and the normal operating angle B is 30 °, this angle being maintained throughout the duration of the casting after the intermediate step cited above.
  • a flange 10 is provided which rigidly connects the bottom of the box to a sleeve 12 mounted movable around the axis X beyond the cylinder 1.
  • a motorized jack 13 fixed to the casting floor ensures the adjustment of the position angular of the box using its working rod whose free end 14 is articulated at a point located on the periphery of the bottom of the box, opposite to the front wall 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
EP90470071A 1989-12-26 1990-12-06 Verfahren zum Einleiten von flüssigem Metall auf eine Walze beim Strangguss und Verfahren zu seiner Durchführung Withdrawn EP0435800A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8917194 1989-12-26
FR8917194A FR2656243A1 (fr) 1989-12-26 1989-12-26 Procede d'amorcage d'une coulee continue de metal liquide sur un cylindre et dispositif pour sa mise en óoeuvre.

Publications (1)

Publication Number Publication Date
EP0435800A1 true EP0435800A1 (de) 1991-07-03

Family

ID=9388964

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90470071A Withdrawn EP0435800A1 (de) 1989-12-26 1990-12-06 Verfahren zum Einleiten von flüssigem Metall auf eine Walze beim Strangguss und Verfahren zu seiner Durchführung

Country Status (11)

Country Link
US (1) US5129445A (de)
EP (1) EP0435800A1 (de)
JP (1) JPH04127938A (de)
AU (1) AU627967B2 (de)
CA (1) CA2031710A1 (de)
FI (1) FI906308A7 (de)
FR (1) FR2656243A1 (de)
IE (1) IE904393A1 (de)
NO (1) NO905549L (de)
PT (1) PT96293A (de)
ZA (1) ZA9010331B (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3627196A1 (de) * 1985-08-13 1987-02-19 Nippon Yakin Kogyo Co Ltd Verfahren und vorrichtung zum herstellen eines duennen metallbleches direkt aus geschmolzenem metall

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3338295A (en) * 1963-10-30 1967-08-29 Albert W Scribner Method for continuously casting between stationary and moving surfaces
CH461715A (fr) * 1966-07-06 1968-08-31 Battelle Development Corp Procédé de fabrication d'un produit continu à partir d'une matière en fusion
JPS59150648A (ja) * 1983-02-18 1984-08-28 Nippon Steel Corp 急冷金属薄帯の製造装置
US4614222A (en) * 1984-05-16 1986-09-30 Battelle Development Corporation Method of and apparatus for casting metal strip employing free gap melt drag
US4907641A (en) * 1988-12-27 1990-03-13 Ribbon Technology Corporation Rotatable crucible for rapid solidification process

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3627196A1 (de) * 1985-08-13 1987-02-19 Nippon Yakin Kogyo Co Ltd Verfahren und vorrichtung zum herstellen eines duennen metallbleches direkt aus geschmolzenem metall

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 11, no. 356 (M-644)(2803), 20 novembre 1987; & JP - A - 62134147 (KAWASAKI STEEL) 17.06.1987 *
PATENT ABSTRACTS OF JAPAN vol. 12, no. 126 (M-687)(2973), 19 avril 1988; & JP - A - 62252645 (HITACHI) 04.11.1987 *

Also Published As

Publication number Publication date
ZA9010331B (en) 1992-07-29
IE904393A1 (en) 1991-07-03
CA2031710A1 (fr) 1991-06-27
FI906308A0 (fi) 1990-12-20
FR2656243A1 (fr) 1991-06-28
AU6828090A (en) 1991-07-04
US5129445A (en) 1992-07-14
NO905549D0 (no) 1990-12-21
AU627967B2 (en) 1992-09-03
JPH04127938A (ja) 1992-04-28
PT96293A (pt) 1991-09-30
NO905549L (no) 1991-06-27
FI906308A7 (fi) 1991-06-27

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