EP0473499B1 - Verfahren und Einrichtung für ein Strahlschutzrohr beim Stranggiessen - Google Patents

Verfahren und Einrichtung für ein Strahlschutzrohr beim Stranggiessen Download PDF

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Publication number
EP0473499B1
EP0473499B1 EP91402296A EP91402296A EP0473499B1 EP 0473499 B1 EP0473499 B1 EP 0473499B1 EP 91402296 A EP91402296 A EP 91402296A EP 91402296 A EP91402296 A EP 91402296A EP 0473499 B1 EP0473499 B1 EP 0473499B1
Authority
EP
European Patent Office
Prior art keywords
tube
tundish
stream protection
protection tube
metal
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.)
Revoked
Application number
EP91402296A
Other languages
English (en)
French (fr)
Other versions
EP0473499A1 (de
Inventor
Jean-Paul Grand
Daniel Juvigny
André Vinuesa
Serge Tortosa
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9399968&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0473499(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sollac SA, Lorraine de Laminage Continu SA SOLLAC filed Critical Sollac SA
Publication of EP0473499A1 publication Critical patent/EP0473499A1/de
Application granted granted Critical
Publication of EP0473499B1 publication Critical patent/EP0473499B1/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
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles

Definitions

  • the present invention relates to a jet protective tube located between the ladle and the liquid metal distributor of a continuous casting installation and to a continuous casting method using such a tube.
  • the flow of liquid metal between the ladle and the distributor takes place by passage through a jet protective tube.
  • This tube fixed at the end of the ladle taphole, is immersed in the distributor in order to guide the jet, to avoid renitriding of the steel and its oxidation due to its contact with air, and avoid entrainment of dross and slag present on the surface of the liquid metal contained in the distributor either towards the bottom, due to the emulsion generated by the fall of the metal from the ladle towards the distributor, or towards outside the dispenser due to possible splashing due to said fall.
  • the problem is as follows: - or the lower part of the jet protective tube is immersed in the liquid metal contained in the dispenser before the opening of the tap tapping hole. In this case, during the opening of said tap hole, the liquid metal of the ladle descends into the tube, compressing the air which was trapped there.
  • part of the jet is not protected and is in contact with the ambient air, which causes oxidation of the liquid metal in this unprotected part.
  • the subject of the invention is a jet protective tube of a continuous casting installation making it possible to remedy these drawbacks as well as a continuous casting process using such a tube.
  • It relates more particularly to a jet protective tube of a continuous casting installation, characterized in particular that the lower end of this tube is provided with at least one air outlet or air outlet.
  • a continuous casting installation is made up of a ladle 1 above a distributor or distributor 2. Between the ladle 1 and the distributor 2, the metal is guided by a protective jet tube 3.
  • the ladle 1 of known type, is provided in its bottom with a tap hole 4, of vertical axis x-x, circular and arranged in its middle in the embodiment shown.
  • the distributor 2 located under the ladle, is filled with a bath of liquid metal 8 and is provided in its bottom with a hole connected in a known manner to a continuous casting line 5.
  • the jet protective tube 3 is a vertical tube of length L, of axis x-x coincident with the axis of the tap hole 4 of the bag 1.
  • the device 6 is a support plate.
  • the tube 3 has, in its lower part opposite the end provided with the device 6 at least one lumen or hole 7, of height h .
  • the tube has two holes of rectangular shape arranged opposite one another in the same cross section of the tube.
  • the tube has four circular holes distributed around the axis x-x and located in the same cross section of the tube 3.
  • the tube may have gills of geometrical shapes different from those shown in FIGS. 2 and 3, and arranged differently, for example four triangular-shaped openings distributed around the periphery of the tube and located in different sections or at different levels.
  • the distance d between the upper end of the nozzle, the highest when the tube has several gills arranged on different sections, and the lower end of the jet protective tube 3, is at most equal to the ferrostatic height at the overflow of the distributor used, that is to say substantially the height of the distributor.
  • the jet protective tube continues to be lowered into the distributor at a speed V until the openings 7 are completely submerged in the distributor bath (Fig. 5).
  • the speed of descent of the tube V is a function of the height of the tube, its section and the density of the metal being poured. It is chosen so that, when the first drop of metal arrives at the gills, the latter are about to be completely immersed in the dispenser bath. - As soon as the openings 7 are completely submerged in the distributor bath, the descent of the tube stops and the entire pocket is poured under these conditions.
  • the entire jet is protected at all stages of the process, which prevents metal oxidation phenomena in the jet.
  • the desired objective is therefore achieved effectively and by particularly simple and inexpensive means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Claims (7)

  1. Strahlschutzrohr (3), welches zwischen der Gießpfanne (1) und dem Zuteiler (2) für das flüssige Metall einer Stanggießeinrichtung liegt, dadurch gekennzeichnet, daß das untere Ende des Rohres (3) mit wenigstens einer Durchtrittsöffnung (7) versehen.
  2. Strahlschutzrohr nach Anspruch 1, dadurch gekennzeichnet, daß der Abstand d zwischen dem oberen Ende der Öffnung (7) und dem unteren Ende des Strahlschutzrohres (3) höchstens gleich der ferrostatischen Höhe am überlauf des Zuteilers (2) ist.
  3. Strahlschutzrohr nach Anspruch 1, dadurch gekennzeichnet, daß die Öffnung (7) rechteckig ist
  4. Strahlschutzrohr nach Anspruch 1, dadurch gekennzeichnet, daß die Öffnung (7) kreisförmig ist.
  5. Strahlschutzrohr nach Anspruch 1, dadurch gekennzeichnet, daß es wenigstens zwei regelmäßig verteilte und im gleichen Querschnitt des Rohres angeordnete Öffnungen (7) aufweist.
  6. Stanggießverfahren, welches ein Strahlschutzrohr nach irgendeinem der Ansprüche 1 bis 5 einsetzt, dadurch gekennzeichnent, daß
       die Gießpfanne (1) über den Verteiler (2) geführt und diese Gießpfanne abgesenkt wird, bis ein unterer Abschnitt (a) des Rohres, der unter der tiefsten Öffnung (7) liegt, in das im Zuteiler enthaltene Metall eintaucht,
       das Gießloch (4) geöffnet wird, das flüssige Metall im Rohr herabsteigt und die durch das Metall geschobene, im Rohr enthaldene Luft über dem Zuteiler durch die Öffnungen (7) entweicht, während das Strahlschutzrohr weiterhin in den Zuteiler abgesenkt wird, bis die Öffnungen (7) vollständig in die Schmelze des Zuteilers eingetaucht sind,
       das Absenken des Rohres angehalten wird, sobald die Öffnungen (7) vollständig in die Schmelze des Zuteilers eingetaucht sind, und das Gießen der gesamten Pfanne unter diesen Bedingungen fortgesetzt wird.
  7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß die Geschwindigkeit (V) des Absenkens des Rohres (3) in den Verteiler so gewählt wird, daß, wenn das Metall auf Höhe der Öffnungen (7) ankommt, sich diese an dem Punkt befinden, wo sie vollständig in die Schmelze des Verteilers eingetaucht sind.
EP91402296A 1990-08-30 1991-08-22 Verfahren und Einrichtung für ein Strahlschutzrohr beim Stranggiessen Revoked EP0473499B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9010829A FR2666257B1 (fr) 1990-08-30 1990-08-30 Tube protecteur de jet d'une installation de coulee continue et procede en comportant application.
FR9010829 1990-08-30

Publications (2)

Publication Number Publication Date
EP0473499A1 EP0473499A1 (de) 1992-03-04
EP0473499B1 true EP0473499B1 (de) 1994-06-22

Family

ID=9399968

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91402296A Revoked EP0473499B1 (de) 1990-08-30 1991-08-22 Verfahren und Einrichtung für ein Strahlschutzrohr beim Stranggiessen

Country Status (6)

Country Link
US (1) US5180537A (de)
EP (1) EP0473499B1 (de)
AT (1) ATE107553T1 (de)
DE (1) DE69102601T2 (de)
ES (1) ES2059081T3 (de)
FR (1) FR2666257B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109916348B (zh) * 2019-03-21 2020-08-21 广西大学 一种基于立式储罐本体泄漏口处液体落地水平距离s计算模型

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH445034A (de) * 1966-10-18 1967-10-15 Metacon Ag Ausgussvorrichtung
US3845943A (en) * 1973-10-26 1974-11-05 J Shapland Refractory pouring tube
US4510191A (en) * 1982-09-30 1985-04-09 Toshiba Ceramics Co., Ltd. Casting nozzle
US4662546A (en) * 1985-07-30 1987-05-05 Allegheny Ludlum Corporation Submerged nozzle for use in the continuous casting of slabs
GB8624738D0 (en) * 1986-10-15 1986-11-19 British Steel Corp Refractory pouring tube
US4887748A (en) * 1986-12-29 1989-12-19 J. W. Hicks, Inc. Apparatus and method for attachment of submerged nozzle to lower plate of sliding gate valve mechanism for a continuous casting operation

Also Published As

Publication number Publication date
EP0473499A1 (de) 1992-03-04
DE69102601T2 (de) 1994-11-24
DE69102601D1 (de) 1994-07-28
ES2059081T3 (es) 1994-11-01
FR2666257A1 (fr) 1992-03-06
US5180537A (en) 1993-01-19
ATE107553T1 (de) 1994-07-15
FR2666257B1 (fr) 1992-12-11

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