EP0577909A1 - Busette de coulée auxiliaire remplaçable - Google Patents

Busette de coulée auxiliaire remplaçable Download PDF

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Publication number
EP0577909A1
EP0577909A1 EP92830368A EP92830368A EP0577909A1 EP 0577909 A1 EP0577909 A1 EP 0577909A1 EP 92830368 A EP92830368 A EP 92830368A EP 92830368 A EP92830368 A EP 92830368A EP 0577909 A1 EP0577909 A1 EP 0577909A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
immersor
sub
refractory material
liquid steel
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Withdrawn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
EP92830368A
Other languages
German (de)
English (en)
Inventor
Romano Cappelli
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.)
FLOCON ITALIANA Srl
Original Assignee
FLOCON ITALIANA Srl
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 FLOCON ITALIANA Srl filed Critical FLOCON ITALIANA Srl
Priority to EP92830368A priority Critical patent/EP0577909A1/fr
Publication of EP0577909A1 publication Critical patent/EP0577909A1/fr
Withdrawn legal-status Critical Current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
    • 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

  • a replaceable auxiliary nozzle is noted, subject of patent n o 1.220.146 filed by FERRIERE NORD S.p.A., used in a tundish for the continuous casting of steel.
  • Said replaceable auxiliary nozzle henceforward termed, for reasons of simplicity, auxiliary nozzle, is used in association with a fixed nozzle to be found on the bottom of the tundish.
  • Said auxiliary nozzle is positioned on a slide-cursor that slides along the bottom of the tundish and is elastically urged against said fixed nozzle, according to an original system.
  • Said slide-cursor slides along slots that allow the positioning of a second cursor, that carries a second auxiliary nozzle, while the first one is still in a working position, so that, by means of an appropriate positioning system of the second cursor and contemporary expulsion of the first cursor, the replacement of the auxiliary nozzles takes place without having to interrupt the casting cycle. This allows to considerably improve the operation of the casting machinery allowing for a greater number of continuous casting hours.
  • the noted auxiliary nozzle has the disadvantage of not allowing the use of the protective tube for the steel jet, so that, while falling into the ingot-mold, said jet is exposed to contamination.
  • the main problem that is solved by the improvements put forward by the present invention is to obviate the above mentioned disadvantage; they comprise, as characterized in the attached claims, a refractory material element, associated to the outlet port of the auxiliary nozzle, that has a semi-spherical convex or conical bottom surface and a hole that is coaxial with the hole in the auxiliary nozzle and comprises, moreover, a jet protection tube, henceforward simply defined sub-immersor nozzle, that has a semi-spherical conical concave shape at its top, which shape corresponds to the above said convex semi-spherical or conical bottom surface of the said element and a hole coaxial to the hole in said element of refractory material; the length of this sub-immersor nozzle is such that its bottom end remains immersed in the steel cast into the ingot mold.
  • Said control means may be a manipulator programmed to execute all the above operations, or else, only the rotation and a first shift that moves the sub-immersor nozzle away from said element in order to have the total removal performed by a person with the use of suitable tongs.
  • Said refractory material element may be porous, so that it will be blown into, by means of a suitable pipe, with a chemically inert pressurized gas so as to create an over-pressure in the coupling area between the same element and the top of said sub-immersor nozzle to avoid the entry of air into the steel flow.
  • the main advantage of the improvements that are subject of the present invention is that of avoiding the possible contamination of the liquid steel casting during the passage from the auxiliary nozzle to the underlying ingot-mold without having to raise the tundish.
  • FIG. 1 shows part of the bottom end of a tundish 1 with a nozzle 2 that bears an auxiliary nozzle 3 under its outlet port, the latter in turn bears on its bottom end, fixed with a liquid steel proof seal, a porous refractory material element 4 the bottom end of which is a convex semi-spherical surface and a hole 5 coaxial to the hole in the nozzle 3.
  • Said semi-spherical surface is suitable for receiving a corresponding concave semi-spherical surface at the upper end of a sub-immersor nozzle 6.
  • a conventional manipulator 7 is fixed to a ring 8 that holds the upper end of the sub-immersor nozzle 6 and is associated with an arm B that bears a counter-weight 9 at its free end, said arm B is hinged to C, so that said counter-weight keeps the sub-immersor nozzle 6 urged against element 4 with liquid steel sealing.
  • said manipulator provides a rotation to the same sub-immersor nozzle, said rotation has its centre coinciding with the centre of said semi-spherical surfaces and this separates and disconnects said sub-immersor nozzle from said element 4 by means of a first shift, then, by means of further shifts it removes said sub-immersor nozzle from the underlying ingot-mold, not shown in the Figure, without having to raise the above tundish.
  • the figure shows a source of pressurized inert gas 10 and a pipe 11 that penetrates the element 4 so as to blow-into it inert gas in order to create an over-pressure in the contact area between element 4 and the top of sub-immersor nozzle 6 that will avoid the entry of air into the steel flow.
  • FIG. 2 shows an auxiliary nozzle 12, of a non visible tundish, that under its outlet port carries a refractory material element 13 that has a conical convex bottom surface with a hole 14 that is coaxial to the hole in the auxiliary nozzle 12.
  • Said conical surface is suitable for receiving a corresponding concave conical surface of the top end of a sub-immersor nozzle 15.
  • Said sub-immersor nozzle 15 is held by a ring 16 fixed to the end of an arm 17 hinged at C and carrying at the other end a counter-weight 18. The action of said counter-weight keeps the sub-immersor nozzle urged against said element 13 at liquid steel sealing pressure.
  • arm 17 is disconnected from the counter-weight 18 thus allowing the sub-immersor nozzle 13 to rotate downwards; at this point an operator, by means of suitable tongs extracts she sub-immersor nozzle from the underlying ingot mold, not visible in the figure, without having to raise the above tundish.
  • the geometry of the above-mentioned concave and convex conical parts is such that the rotation of the sub-immersor nozzle 15 takes place without interfering with element 13.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP92830368A 1992-07-10 1992-07-10 Busette de coulée auxiliaire remplaçable Withdrawn EP0577909A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP92830368A EP0577909A1 (fr) 1992-07-10 1992-07-10 Busette de coulée auxiliaire remplaçable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92830368A EP0577909A1 (fr) 1992-07-10 1992-07-10 Busette de coulée auxiliaire remplaçable

Publications (1)

Publication Number Publication Date
EP0577909A1 true EP0577909A1 (fr) 1994-01-12

Family

ID=8212137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92830368A Withdrawn EP0577909A1 (fr) 1992-07-10 1992-07-10 Busette de coulée auxiliaire remplaçable

Country Status (1)

Country Link
EP (1) EP0577909A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1199121A1 (fr) * 2000-10-20 2002-04-24 SMS Demag AG Dispositif pour guider l'écoulement d'un métal fondu, en particulier d'un acier fondu
WO2009080257A1 (fr) * 2007-12-20 2009-07-02 Siemens Vai Metals Technologies Gmbh & Co Dispositif pour raccorder avec possibilité de remplacement un tube de coulée à une busette de coulée d'un récipient de matière en fusion
WO2010057640A1 (fr) * 2008-11-20 2010-05-27 Vesuvius Group S.A. Tube de coulee, dispositif de manipulation de ce tube et dispositif d'entrainement d'une valve
EP2301693A1 (fr) * 2009-06-29 2011-03-30 Vesuvius Group S.A Tube de protection de jet.
EP2841222A2 (fr) * 2012-04-26 2015-03-04 SMS Concast AG Busette de coulée réfractaire pour une lingotière servant à la coulée continue de métal en fusion
US11795950B2 (en) * 2017-07-20 2023-10-24 Pyrotek, Inc. Mold pump engagement apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0073573A1 (fr) * 1981-08-07 1983-03-09 Steel Castings Research And Trade Association Transfert contrôlé de métal liquide
US4526304A (en) * 1983-05-16 1985-07-02 Allied Corporation Apparatus for rapid changing of nozzles
US4854487A (en) * 1987-12-21 1989-08-08 Akechi Ceramics Co., Ltd. Molten steel pouring nozzle
EP0442515A1 (fr) * 1990-02-15 1991-08-21 Romano Dr.-Ing. Cappelli Dispositif de remplacement d'une buse de coulée immergée entre deux récipients métallurgiques d'une installation de coulée continue

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0073573A1 (fr) * 1981-08-07 1983-03-09 Steel Castings Research And Trade Association Transfert contrôlé de métal liquide
US4526304A (en) * 1983-05-16 1985-07-02 Allied Corporation Apparatus for rapid changing of nozzles
US4854487A (en) * 1987-12-21 1989-08-08 Akechi Ceramics Co., Ltd. Molten steel pouring nozzle
EP0442515A1 (fr) * 1990-02-15 1991-08-21 Romano Dr.-Ing. Cappelli Dispositif de remplacement d'une buse de coulée immergée entre deux récipients métallurgiques d'une installation de coulée continue

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1199121A1 (fr) * 2000-10-20 2002-04-24 SMS Demag AG Dispositif pour guider l'écoulement d'un métal fondu, en particulier d'un acier fondu
WO2009080257A1 (fr) * 2007-12-20 2009-07-02 Siemens Vai Metals Technologies Gmbh & Co Dispositif pour raccorder avec possibilité de remplacement un tube de coulée à une busette de coulée d'un récipient de matière en fusion
US8376196B2 (en) 2007-12-20 2013-02-19 Siemens Vai Metals Technologies Gmbh Apparatus for the interchangeable connection of a casting tube to a spout of a melt vessel
WO2010057640A1 (fr) * 2008-11-20 2010-05-27 Vesuvius Group S.A. Tube de coulee, dispositif de manipulation de ce tube et dispositif d'entrainement d'une valve
CN102281972A (zh) * 2008-11-20 2011-12-14 维苏威集团有限公司 浇注长水口、该长水口操控装置及阀驱动装置
AU2009317593B2 (en) * 2008-11-20 2014-05-08 Vesuvius Group S.A. Casting pipe, device for handling said pipe and valve driving device
CN102281972B (zh) * 2008-11-20 2014-12-24 维苏威集团有限公司 浇注长水口、该长水口操控装置及阀驱动装置
US8926893B2 (en) 2008-11-20 2015-01-06 Vesuvius Group S.A. Casting shroud, manipulation device for this shroud, and device for driving a valve
EP2301693A1 (fr) * 2009-06-29 2011-03-30 Vesuvius Group S.A Tube de protection de jet.
EP2841222A2 (fr) * 2012-04-26 2015-03-04 SMS Concast AG Busette de coulée réfractaire pour une lingotière servant à la coulée continue de métal en fusion
US11795950B2 (en) * 2017-07-20 2023-10-24 Pyrotek, Inc. Mold pump engagement apparatus

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Inventor name: CAPPELLI, ROMANO