WO2022073648A1 - Butoir - Google Patents

Butoir Download PDF

Info

Publication number
WO2022073648A1
WO2022073648A1 PCT/EP2021/052392 EP2021052392W WO2022073648A1 WO 2022073648 A1 WO2022073648 A1 WO 2022073648A1 EP 2021052392 W EP2021052392 W EP 2021052392W WO 2022073648 A1 WO2022073648 A1 WO 2022073648A1
Authority
WO
WIPO (PCT)
Prior art keywords
tubular body
stopper
holding part
collar
plug
Prior art date
Application number
PCT/EP2021/052392
Other languages
German (de)
English (en)
Inventor
David Troiss
Heinz Rumpler
Christian GLÖSSL
Original Assignee
Sheffield Hi-Tech Refractories Germany Gmbh
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 Sheffield Hi-Tech Refractories Germany Gmbh filed Critical Sheffield Hi-Tech Refractories Germany Gmbh
Priority to EP21704435.3A priority Critical patent/EP4225520A1/fr
Publication of WO2022073648A1 publication Critical patent/WO2022073648A1/fr

Links

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
    • B22D41/14—Closures
    • B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
    • B22D41/18—Stopper-rods therefor
    • B22D41/186—Stopper-rods therefor with means for injecting a fluid into the melt
    • 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
    • B22D11/10—Supplying or treating molten metal
    • 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
    • B22D41/14—Closures
    • B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
    • B22D41/20—Stopper-rod operating equipment
    • 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
    • B22D41/502—Connection arrangements; Sealing means therefor

Definitions

  • the invention relates to a stopper for cooperation with a bottom pouring nozzle or a so-called pouring pipe in a metallurgical vessel, in particular in a continuous casting device for casting liquid metals and alloys, for controlling the casting speed, essentially comprising a refractory carbon-bonded ceramic pipe body with a fixing area on the one hand or attachment area of the tubular body in a fixing means in an actuating device, with a line of inert gas into the hollow of the tubular body and on the other hand, or opposite at the plug end, a convex-conical control area with a substantially central gas discharge into the liquid metal.
  • Melts of metals and metal alloys are usually cast in continuous casting devices, with liquid metal being introduced from a metallurgical vessel, a so-called distributor, into a crystallizer or a mold and the partially solidified strand being drawn off downwards.
  • a supply of liquid metal from the distributor into the mold or a casting speed is regulated by means of a stopper in cooperation with a bottom pouring nozzle, possibly with different embodiments of the same.
  • one-piece stopper tubes made of refractory material with an internal thread or those with an internal metal sleeve with an internal thread are usually provided for a threaded rod for fixing or fastening the stopper.
  • a threaded rod usually has a central cavity or a hollow space in a conduit with on the one hand a supply line with a connection and on the other hand a seal for passing on inert gas into the tubular body.
  • the term “hollow” is understood by the person skilled in the art as an axial recess made of a material part.
  • the plug with the plug-retaining part remains detached from the fixing means on the actuating device and from the inert gas connection in the distributor and is usually ultimately allocated to the scrap.
  • the aim of the invention is to create a new plug formation or a new plug design with which a continuous casting device can be made ready for casting with less work and with high efficiency and a high level of safety in a casting operation can be achieved.
  • a stopper of the type mentioned at the outset for cooperation with a bottom discharge nozzle in a metallurgical vessel in that the refractory tubular body has at least partially a collar with an enlarged outer diameter or an outer groove in the area of the fixing and is spaced opposite the end face of the tubular body a collar ring surface is formed for an engaging part of a fixing means.
  • An outer collar with an enlarged outer diameter of the ceramic tubular body or by means of an outer groove in its surface area on the one hand achieves high stability and on the other hand a simple fixing solution. Furthermore, due to the enlarged frontal area of the tubular body, Efficient sealing of an inert gas supply line to the control area of the stopper.
  • an optimal shape of the engagement part(s) of the fixing means of the tubular body can be used in the stopper holding part in a favorable manner, depending on the size and design of the continuous casting device.
  • a stopper holding part with a cavity for conducting inert gas has an eccentric support surface on the front side, which can be placed on an end face of the tubular body of the same shape by means of a fixing means, a displacement-free or dimensionally stable and gas-tight connection of the stopper holding part and tubular body can be achieved, which means that even under loads in heavy casting operation, interaction between the stopper and the bottom discharge nozzle is ensured.
  • the front support surface of the stopper holding part and the cooperating front surface of the tubular body can be flat, conical in the axial direction or, in particular, spherical as a lockable ball joint. A stable and safe interaction of the control range of the stopper and the bottom discharge nozzle in the distributor is thus guaranteed even if the axial positions do not exactly match.
  • the collar ring surface is formed with the opposite shape as the end face of the ceramic tube body, because this does not result in any loss of stability if the axis of the tube body is skewed.
  • the fixing means of the tubular body can be moved by displacement means on the stopper holding part in such a way that the end face of the tubular body and the tubular body support surface of the stopper holding part can be placed against one another or can be distanced from one another when the engagement parts are released.
  • Such an embodiment is favorable for an adjustment of the stopper to the floor spout nozzle and for a release of the tubular body.
  • the pressure in the argon supply line can only be set slightly above atmospheric pressure, it is generally and economically advantageous if there is a detachable sealant with a central cavity in the line between the tubular body support surface of the stopper holding part and the end face of the tubular body of inert gas is arranged.
  • the tubular body has a divided collar in the fixing area, i.e. sectors with an enlarged diameter
  • the fixing means for the tubular body has recesses of the engagement part at the same angle, so that with approximately the same axial position by rotating the fixing means on the stopper holding part or by rotating the tubular body, the sectors of the collar and the sectors of the engagement parts can be positioned in the free or in the cooperating state, wherein in the cooperating state of the sectors the end face of the tubular body can be placed against the support surface of the stopper holding part by axial displacement of the fixing means.
  • Fig. 1 to 1C Pipe body made of refractory material and a plug production in three steps with an installation in an actuating means according to the PRIOR ART.
  • Fig. 2 to 2B pipe body made of refractory material with a flat face and a plug production in two steps with an incorporation into an actuating means according to the invention.
  • Fig. 3 to 3B pipe body made of refractory material with a spherical end surface and a plug production in two steps with an incorporation into an actuating means according to the invention.
  • Fig. 1 Plug according to the state of the art
  • A1 metal sleeve (in the refractory tube body)
  • Fig. 2 Plug according to the invention:
  • a refractory tubular body 3 with an axis X has a control part 11 for controlling the casting quantity in cooperation with a bottom pouring nozzle 2 .
  • a metal sleeve A1 with an internal thread is embedded in the tubular body 3 at a distance from the end face thereof.
  • a seal A2 is located in the cavity to the metal sleeve A1.
  • a threaded rod A5 as a stopper holding part is screwed into the metal sleeve A1, provides a seal A2 against loss of inert gas and is stabilized via a metal disc A3 by a fixing nut A4.
  • the threaded rod A5 of the stopper 1 is equipped with a lower and an upper set of cone and ball disk parts B1, B2 between clamping nuts B3, B4.
  • the threaded rod A5 or the stopper holding part is positioned in such a way that a device 61 for actuating the stopper 1, a so-called stopper arm 61, is located between the respective conical and spherical disks B1, B2 and the clamping nuts B3, B4 is located, after which the control area 1 1 on the tubular body 3 is aligned with the bottom spout nozzle 2 and the clamping nuts B3, B4 are fixed.
  • tubular threaded rod A5 is connected to an inert gas supply 5.
  • the threaded rod A5 is detached from the stopper arm 61 and the inert gas supply line 5 is disconnected and the distributor vessel M is lifted out, with the threaded rod A5 remaining in the stopper.
  • FIG. 2 illustrates a stopper according to the invention in two manufacturing steps (FIGS. 2A, 2B).
  • a refractory tubular body 3 has a collar 32 with an enlarged diameter in the fixing area 31 .
  • An end face 321 of the tubular body 3 is planar and formed radially with respect to the X axis.
  • a collar ring surface 33 forms on the outside of the collar 32 and is spaced apart from the planar end face 321 and forms a contact surface for an engagement part 41 for a fixing means 4 .
  • the refractory tubular body 3 also has, opposite the fixing area 31 , a control area 11 in the usual form with a substantially central gas outlet 12 , which control area interacts with a bottom discharge nozzle 2 or the like in the distributor M.
  • a flow control part 35 known from DE202015001370 U1, is advantageously and effectively provided in the axial inert gas line 5 in the tubular body 3 below the liquid level in the distributor.
  • a connection is made to a stopper holding part 6 in the fixing area 31 of the tubular body 3 by means of a fixing means 4.
  • a detachable fixing means 4 which acts on the outside of the ceramic tube body 3, can be shaped in different ways, with helical or bayonet-like shapes having already been suggested by those skilled in the art.
  • Fig. 4 shows some collar forms in principle.
  • FIG. 2 shows a refractory tubular body 3 with a split collar 32 and a split engagement part 41 in the fixing means 4, wherein the fixing means 4 can be placed on the plug holding part 6 with a displacement means 63 or a displacement screw nut 63.
  • the ceramic tube body 3 can be either removed from the plug holding part 6 (FIG. 2A) or fixed thereto (FIG. 2B). It should also be noted that when the end face 321 of the tubular body 3 is pressed against the support face 62 on the stopper holding part 6 by means of a displacement means 63, a simple and effective positioning of the sealing means 64 is made possible.
  • a fixing means 4 can be released in a simple manner by positioning the displacement means 63 and the plug-holding part 4 can be rotated with the engagement part 41 and released or lifted out of the fixing area 31 of the tubular body 3.
  • Fig. 3 shows a similar plug formation with a spherical surface shape of the end surface 321 of the tubular body 3 and the support surface 62 of the plug holding part 6 with a sealing means 64 between the surfaces of the same shape.
  • the angular deviation of the axes can be compensated for by means of a spherical contact surface 321 on the tubular body 3 and a support surface 62 of the same shape on the stopper holding part 6 full stability of the stopper can be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

L'invention concerne un butoir (1) destiné à coopérer avec une buse de décharge inférieure (2) dans un récipient métallurgique (M). Afin d'obtenir une conception améliorée avec un fonctionnement fiable du butoir (1), il est prévu selon l'invention que le corps de tube réfractaire ou céramique (3) comporte, dans au moins une partie de la région de l'emplacement de fixation (31), un collier de diamètre extérieur agrandi (32) ou un rainurage externe, et qu'une surface de collier annulaire (33) destinée à un élément de mise en prise (41) d'un moyen de fixation (4) soit formée à une certaine distance face à la surface d'extrémité (321) du corps de tube (3).
PCT/EP2021/052392 2020-10-09 2021-02-02 Butoir WO2022073648A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21704435.3A EP4225520A1 (fr) 2020-10-09 2021-02-02 Butoir

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50874/2020 2020-10-09
ATA50874/2020A AT524495A1 (de) 2020-10-09 2020-10-09 Stopfen

Publications (1)

Publication Number Publication Date
WO2022073648A1 true WO2022073648A1 (fr) 2022-04-14

Family

ID=74586985

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/052392 WO2022073648A1 (fr) 2020-10-09 2021-02-02 Butoir

Country Status (4)

Country Link
EP (1) EP4225520A1 (fr)
AT (1) AT524495A1 (fr)
DE (1) DE202021102899U1 (fr)
WO (1) WO2022073648A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4791978A (en) 1987-11-25 1988-12-20 Vesuvius Crucible Company Gas permeable stopper rod
US5071043A (en) 1989-08-03 1991-12-10 Vesuvius Crucible Company Stopper rod with an improved gas distribution
WO2000074880A1 (fr) * 1999-06-08 2000-12-14 Foseco International Limited Quenouille
DE202015001370U1 (de) 2014-03-12 2015-03-03 Sheffield Hi-Tech Refractories Germany Gmbh Stopfen in einem Verteilergefäß

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4946083A (en) * 1988-12-29 1990-08-07 Vesuvius Crucible Company One-piece stopper rod
DE4313427C1 (de) * 1993-04-26 1994-08-18 Labod Burkhard Anordnung zur Verbindung einer Stopfenstange für ein metallurgisches Gefäß mit ihrer Hebevorrichtung und für die Anordnung geeignete Stopfenstange sowie Verfahren zur Herstellung der Anordnung
DE19823988C2 (de) * 1998-05-29 2000-07-20 Didier Werke Ag Stopfen für den Verschluß von Metallschmelze aufnehmenden Behältnissen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4791978A (en) 1987-11-25 1988-12-20 Vesuvius Crucible Company Gas permeable stopper rod
US5071043A (en) 1989-08-03 1991-12-10 Vesuvius Crucible Company Stopper rod with an improved gas distribution
WO2000074880A1 (fr) * 1999-06-08 2000-12-14 Foseco International Limited Quenouille
DE202015001370U1 (de) 2014-03-12 2015-03-03 Sheffield Hi-Tech Refractories Germany Gmbh Stopfen in einem Verteilergefäß

Also Published As

Publication number Publication date
EP4225520A1 (fr) 2023-08-16
DE202021102899U1 (de) 2021-06-11
AT524495A1 (de) 2022-06-15

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