EP0528724B1 - Vorrichtung zum automatischen Entschlacken des Giessstrahlschutzrohres beim Stranggiessen - Google Patents

Vorrichtung zum automatischen Entschlacken des Giessstrahlschutzrohres beim Stranggiessen Download PDF

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Publication number
EP0528724B1
EP0528724B1 EP92402259A EP92402259A EP0528724B1 EP 0528724 B1 EP0528724 B1 EP 0528724B1 EP 92402259 A EP92402259 A EP 92402259A EP 92402259 A EP92402259 A EP 92402259A EP 0528724 B1 EP0528724 B1 EP 0528724B1
Authority
EP
European Patent Office
Prior art keywords
protective tube
installation
fact
descaling
sleeve
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
EP92402259A
Other languages
English (en)
French (fr)
Other versions
EP0528724A1 (de
Inventor
Gilbert Alberti
Serge Monte
Jacques Garcia
Ahmed Bahi
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.)
Sollac SA
Original Assignee
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
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 Sollac SA, Lorraine de Laminage Continu SA SOLLAC filed Critical Sollac SA
Publication of EP0528724A1 publication Critical patent/EP0528724A1/de
Application granted granted Critical
Publication of EP0528724B1 publication Critical patent/EP0528724B1/de
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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
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/001—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like devices for cleaning ladles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/52—Manufacturing or repairing thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/56—Means for supporting, manipulating or changing a pouring-nozzle

Definitions

  • the present invention relates to an installation for automatic cleaning of a protective tube for continuous casting jet.
  • This tube fixed at the end of the ladle's pouring hole, is immersed in the distributor in order to guide the jet, to avoid renitriding of the metal and its oxidation due to its contact with air, and avoid the entrainment of dross and slag present on the surface of the liquid metal contained in the distributor either towards the bottom, because of the emulsion generated by the fall of the metal from the ladle towards the distributor, or towards the outside of the dispenser due to possible splashing due to said fall.
  • the ladle is provided at its bottom with a tap hole with a vertical axis comprising a shutter drawer and means of temporary attachment to the jet protective tube such as a nozzle ensuring sealing.
  • the protective tube When the molten metal is poured, the protective tube is brought below the ladle and held with it in the axis of the tap hole.
  • This jet protective tube quickly becomes clogged during casting due to the solidification of the metal and its cleaning is necessary with each change of pocket.
  • the combustion of oxygen with the iron inside the protective tube acts as a torch, which makes it possible to remove the solidified metal in said protective tube.
  • the cleaning of the protective tube depends on the dexterity of the operator who works in a dark, congested environment near the ladle and the dispenser, so that cleaning the tube is not always well carried out which involves a risk of piercing the tube, a risk of resurgence due to plugging thereof as well as a risk of renitriding the metal due to a poor seal between the nozzle, the pocket and the protective tube.
  • the object of the present invention is to avoid these drawbacks by proposing an installation for automatic cleaning of a protective tube for a continuous casting jet.
  • a continuous casting installation is composed of a casting ladle 1 supported for example by a gantry not shown and containing liquid metal 2.
  • the ladle 1 is arranged above a distributor or distributor 3 supported by a casting floor 4 by suitable means.
  • the metal is guided by a jet protective tube 5.
  • the ladle 1 is of known type and provided at its bottom with a tap hole 6, of circular vertical axis and comprising, on the one hand, a shutter drawer 7 and, on the other hand, means 8 for momentary attachment of the protective tube 5 such as a nozzle ensuring sealing.
  • the distributor 3 located under the ladle 1 is filled with a bath of liquid metal 9 and is provided at its bottom with a hole 10 connected in a known manner to the casting line 11.
  • the jet protective tube 5 is a vertical tube of axis coincident with the axis of the tap hole 6 of the bag 1 and its lower end plunges into the bath 9 of liquid metal of the distributor 3 in order to avoid in particular the re-nitriding of the metal and its oxidation due to its contact with air.
  • This jet protective tube 5 quickly becomes clogged during casting due to the solidification of the metal and its cleaning is necessary at each change of pocket.
  • the subject of the present invention is an automatic installation 20 for cleaning the protective tube 5.
  • This installation shown schematically in FIG. 1 comprises the means for transferring the protective tube 5 between the ladle 1 and this installation and for maintaining this protective tube 5 in said installation.
  • a manipulator 21 supported by a gantry 22 ( Figures 1 and 2).
  • the manipulator 21 makes it possible to hold the protective tube 5 under the ladle 1 and moving said protective tube 5 between the ladle 1 and the scouring installation 20.
  • This manipulator 21 can be moved vertically by suitable means, not shown, and comprises an arm 23, horizontal which is provided at its free end with a member for engaging the protective tube 5, constituted for example by a rotary head.
  • the scouring installation 20 includes means for sucking up the fumes emitted during the scouring of the protective tube 5.
  • suction means consist of a hood 25 connected by a conduit 26 to a smoke filtration system not shown.
  • the scrub installation 20 also includes means for insufflating oxygen under pressure.
  • These oxygen blowing means comprise a scouring ball 27 which will be described in more detail later. and which is arranged below the hood 25.
  • the scouring ball 27 is supported by a support 28 disposed inside the hood 25 and is connected by a conduit 29 to oxygen supply means, not shown.
  • the scouring installation 20 includes means for recovering the metal leaving the protective tube 5 when it is scoured, constituted by a tank 30 made of bricks of refractory material and filled with sand.
  • the hood 25 is arranged above and at a certain distance from the tank 30 so as to provide sufficient space for the positioning of the protective tube 5 by the arm 23 of the manipulator 21.
  • the scouring ball 27 is formed of two parts, an end piece 40 of refractory material and a sleeve 41 of stainless steel.
  • the refractory material is for example graphite alumina.
  • the end piece 40 has, over part of its length, a blind bore 42.
  • this nozzle 40 comprises a cylindrical portion 40a delimited at one of its ends by a flat face 40b and at the other end by a spherical cap 40c.
  • the nozzle 40 also includes channels 43 for distributing oxygen which are inclined relative to the axis of said nozzle. These channels 43 diverge from the center of the spherical cap 40c towards its periphery and put the bore 42 into communication with the outside.
  • the channels 43 are for example six in number, as shown in FIG. 4.
  • the sleeve 41 comprises a central oxygen supply duct 41a and on its external surface, a first smooth portion 41b intended to be introduced into the bore 42 of the end piece 40, a second threaded portion 41c and a third portion 41d intended to be connected to conduit 29.
  • end piece 40 and the sleeve 41 are equipped with locking means between them which are constituted, in this exemplary embodiment, by a bayonet system 44 and by at least one nut 45 screwed onto the threaded portion 41c of the sleeve. 41 and intended to come to be applied on the flat upper part 40b of said nozzle.
  • a metal washer 46 is interposed between the nut 45 and the end piece 40.
  • the end piece 40 and the sleeve 41 can be glued.
  • the scouring ball 27 also consists of two parts, a tip 40 and a sleeve 41 inserted into said tip.
  • This end piece 40 comprises, as for the previous embodiment, a cylindrical portion 40a delimited at one of its ends by a flat face 40b and at the other end by a spherical cap 40c.
  • the sleeve 41 also includes a central oxygen supply duct 41a, and on its external face, a first smooth portion 41b, a second threaded portion 41c and a third portion 41d intended to be connected to the duct 29.
  • the bore 42 of the end piece 40 opens into a chamber 50 formed inside said end piece.
  • the channels 43 also open into this chamber 50 and are, in this case, parallel to the axis of the end piece 40. These channels are for example six in number.
  • the means for locking the sleeve 41 in the end piece 40 are constituted by a pin 51 passing through the end piece 40 and the portion 41b of the sleeve 41 disposed in said end piece and also by at least one nut 45 screwed onto the threaded portion 41c of the sleeve 41 and intended to come to bear on the upper part 40b of the end piece 40.
  • the end piece 40 and the sleeve 41 can be glued together.
  • the manipulator 21 supporting and pressing the protective tube 5 to the ladle 1 separates it from the latter.
  • the manipulator 21 transfers the protective tube 5 to the scouring installation 20 and positions this protective tube 5 in the axis of the scouring ball 27.
  • the manipulator 21 slightly raises the protective tube 5 to apply it under the scouring ball 27 as shown in FIG. 2 and the cleaning cycle can start.
  • the operator gradually opens a valve, not shown, located on the duct 29 outside the scouring installation 20.
  • the pressurized oxygen arrives through the conduit 29 enters the scouring ball and is diffused into the protective tube 5 through the channels 43.
  • the combustion of oxygen with the iron inside the protective tube 5 acts as a torch, which makes it possible to remove the solidified metal in said protective tube and the metal is recovered in the tank 30.
  • the fumes emitted during the cleaning of the protective tube 5 are recovered in the hood 25.
  • the cleaning of the protective tube 5 is finished when there is no longer any metal leaving said tube.
  • the operator cuts off the oxygen supply and the cleanliness of the protective tube 5 can be checked either visually or by a camera.
  • the protective tube thus cleaned is removed from the scouring installation, then transferred to the continuous casting installation for a new casting.
  • the scrub installation according to the present invention makes it possible to improve hygiene and safety since all the operations are controlled remotely.

Claims (10)

  1. Vorrichtung zum automatischen Entschlacken des Gießstrahlschutzrohres (5) beim Stranggießen, dadurch gekennzeichnet, daß sie umfaßt:
    - Mittel (21, 23, 24) zum Halten des Schutzrohres (5) unter eine Stranggießpfanne (1), zum Transport des genannten Rohres (5) zwischen der Gießpfanne (1) und der Entschlackungsanlage (20) und zum Halten dieses Schutzrohres (5) in der genannten Anlage (20),
    - Mittel (27) zum Einblasen von Sauerstoff unter Druck in das Schutzrohr (5),
    - Mittel (25, 26) zum Absaugen des beim Entschlacken des Schutzrohres (5) abgegebenen Rauches,
    - und Mittel (30) zur Rückgewinnung des zum Zeitpunkt der Entschlackung aus dem Schutzrohr (5) austretenden Metalles, wobei diese verschiedenen Mittel ferngesteuert sind.
  2. Vorrichtung nach Patentanspruch 1, dadurch gekennzeichnet, daß die Mittel zum Einblasen von Sauerstoff aus einer Entschlackungskugel (27) aus feuerfestem Material bestehen, die mindestens einen Kanal (43) zur Abgabe von Sauerstoff aufweist, und mit Mitteln zur Sauerstoffversorgung verbunden ist.
  3. Vorrichtung nach Patentanspruch 2, dadurch gekennzeichnet, daß das feuerfeste Material graphitierte Tonerde ist.
  4. Vorrichtung nach Patentanspruch 2, dadurch gekennzeichnet, daß die Enschlackungskugel (27) einerseits aus einem Ansatzstück (40) besteht, das auf einem Teil seiner Länge mit einer Bohrung (42, 50) versehen ist, in die dieser Abgabekanal (43) mündet, und andererseits einer Hülse (41), die auf einem Teil ihrer Länge in eine Bohrung (42, 50) dieses Ansatzstückes (40) ragt und einen zentralen Kanal (41a) zur Sauerstoffversorgung aufweist, der mit dem genannten Abgabekanal (43) in Verbindung steht.
  5. Vorrichtung nach Patentanspruch 4, dadurch gekennzeichnet, daß das Ansatzstück (40) und die Hülse (41) Mittel (44, 45, 51) zur Verriegelung miteinander aufweisen.
  6. Vorrichtung nach Patentanspruch 5, dadurch gekennzeichnet, daß die Verriegelungsmittel aus einem Bajonettsystem (44) bestehen und aus mindestens einer Mutter (45), die auf diese Hülse (41) geschraubt wird und dazu bestimmt ist, sich an den oberen Teil (40b) des genannten Ansatzstückes (40) anzulegen.
  7. Vorrichtung nach Patentanspruch 5, dadurch gekennzeichnet, daß die Verriegelungsmittel aus einem Stift (51) bestehen, der das Ansatzstück (40) und den Teil der Hülse (41) durchquert, der sich in diesem Ansatzstück (40) befindet, und aus mindestens einer Mutter (45), die auf diese Hülse (41) geschraubt wird und dazu bestimmt ist, sich an den oberen Teil (40b) des Ansatzstückes (40) anzulegen.
  8. Vorrichtung nach Patentanspruch 4, dadurch gekennzeichnet, daß das Ansatzstuck (40) und die Hülse (41) aneinandergeklebt sind.
  9. Vorrichtung nach Patentanspruch 1, dadurch gekennzeichnet, daß die Mittel zum Rauchabsaugen aus einer Haube (25) bestehen, die über den Mitteln (30) zur Rückgewinnung des Metalles angeordnet ist und mit diesen einen Raum zur Anordnung des Schutzrohres (5) ausspart.
  10. Vorrichtung nach einem der vorangehenden Patentansprüche, dadurch gekennzeichnet, daß die Entschlackungskugel (27) unterhalb der Haube (25) angeordnet ist.
EP92402259A 1991-08-09 1992-08-07 Vorrichtung zum automatischen Entschlacken des Giessstrahlschutzrohres beim Stranggiessen Expired - Lifetime EP0528724B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9110179A FR2680126B1 (fr) 1991-08-09 1991-08-09 Installation de decrassage automatique d'un tube protecteur de jet de coulee continue.
FR9110179 1991-08-09

Publications (2)

Publication Number Publication Date
EP0528724A1 EP0528724A1 (de) 1993-02-24
EP0528724B1 true EP0528724B1 (de) 1995-12-06

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ID=9416098

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Application Number Title Priority Date Filing Date
EP92402259A Expired - Lifetime EP0528724B1 (de) 1991-08-09 1992-08-07 Vorrichtung zum automatischen Entschlacken des Giessstrahlschutzrohres beim Stranggiessen

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Country Link
EP (1) EP0528724B1 (de)
AT (1) ATE131093T1 (de)
DE (1) DE69206521T2 (de)
FR (1) FR2680126B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT405797B (de) * 1996-04-16 1999-11-25 Voest Alpine Stahl Donawitz Verfahren und vorrichtung zum entfernen von giessansätzen aus schattenrohren
EP2191918A1 (de) * 2008-11-20 2010-06-02 Vesuvius Group S.A Reinigungsvorrichtung für Gießpfannenrohr zum Flüssigmetallguss
CN110280751B (zh) * 2019-07-31 2021-06-15 广东韶钢松山股份有限公司 一种长水口碗部清理装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT394818B (de) * 1986-10-22 1992-06-25 Stangl Kurt Dipl Ing Manipulator zum ansetzen eines giessrohres an den ausgussschieber einer giesspfanne
FR2616365B1 (fr) * 1987-06-11 1989-10-27 Clecim Sa Dispositif perfectionne de fermeture avec nettoyage d'un trou de coulee
JPH0299250A (ja) * 1988-09-30 1990-04-11 Kobe Steel Ltd タンディッシュのスラグ除去方法

Also Published As

Publication number Publication date
DE69206521T2 (de) 1996-05-09
DE69206521D1 (de) 1996-01-18
EP0528724A1 (de) 1993-02-24
FR2680126B1 (fr) 1993-11-19
ATE131093T1 (de) 1995-12-15
FR2680126A1 (fr) 1993-02-12

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