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EP0551581B1 - Slopper for metallurgical vessels - Google Patents

Slopper for metallurgical vessels Download PDF

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Publication number
EP0551581B1
EP0551581B1 EP92119190A EP92119190A EP0551581B1 EP 0551581 B1 EP0551581 B1 EP 0551581B1 EP 92119190 A EP92119190 A EP 92119190A EP 92119190 A EP92119190 A EP 92119190A EP 0551581 B1 EP0551581 B1 EP 0551581B1
Authority
EP
European Patent Office
Prior art keywords
stopper
plug
thermocouple
axial channel
channel
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
EP92119190A
Other languages
German (de)
French (fr)
Other versions
EP0551581A1 (en
Inventor
Hermann Lax
Andreas Au
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.)
Thyssen Stahl AG
Original Assignee
Thyssen Stahl AG
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 Thyssen Stahl AG filed Critical Thyssen Stahl AG
Publication of EP0551581A1 publication Critical patent/EP0551581A1/en
Application granted granted Critical
Publication of EP0551581B1 publication Critical patent/EP0551581B1/en
Anticipated expiration legal-status Critical
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
    • B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
    • B22D2/006—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass for the temperature of the 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
    • B22D41/18—Stopper-rods therefor
    • B22D41/186—Stopper-rods therefor with means for injecting a fluid into the melt

Definitions

  • the invention relates to a stopper made of refractory material in the form of a rod for a metallurgical casting vessel, in particular with an axial channel for gas, additives or the like leading to an outlet in the stopper cap, as is known from US Pat. No. 3,200,457 .
  • a temperature measuring device in the form of a thermocouple arranged in a protective tube made of refractory material is arranged between the outlet of the casting vessel and a pouring jet protective tube that supplies the melt.
  • This protective tube is mounted on a cover of the casting vessel.
  • thermocouple with the measuring lines in a central axial channel, which is closed at the bottom, of a plug designed as a rod.
  • the disadvantage of this type of arrangement is that it is not possible to supply gas and / or additives to the melt via the stopper and that the thermocouple only indicates the temperature of the melt with a certain time delay and inaccurately because of the thick wall of the stopper rod .
  • the invention has for its object to provide a device for temperature measurement in a metallurgical casting vessel, which is robust with little manufacturing effort and the temperature of the melt leaving the casting vessel as accurately as possible indicates.
  • thermocouple with its measuring lines benefits from the necessary structural robustness of the plug. That's why The wall thickness where the thermocouple with the measuring lines is housed can be very small, which benefits the requirement for the smallest possible delay in temperature measurement and measuring accuracy. For the accuracy of measurement it is also advantageous that the temperature is measured immediately before the outlet of the casting vessel. This is particularly advantageous if the casting vessel has several outlets, as is the case with a multi-strand casting system. In this case, the temperature can be measured individually for each outlet. Finally, the otherwise necessary mounting and installation means for the thermocouple and its supply lines are omitted in the invention. Since the axial channel for the thermocouple is arranged eccentrically in the stopper, there is also enough space for accommodating the further axial channel for gas, additives or the like leading to an outlet in the stopper cap, so that the stopper can fulfill a double function.
  • the stopper above the stopper cap has an integrally formed rib which extends in the axial direction and in which the channel for the thermocouple is located.
  • This rib is advantageous because, in this case, a wall thickness which is small, in particular uniformly thick, for heat conduction can be achieved over approximately half the circumference.
  • the wall thickness of the rib should not exceed 15 mm.
  • Molten metal is introduced into a casting vessel 1 via a pouring jet protection tube 2 and flows out of the vessel 1 via an outlet 3.
  • the casting vessel 1 is covered by a lid 4.
  • the outlet 3 can be closed with the stopper cap 5a formed at the lower end of the stopper 5.
  • an axial central channel 5b extends through which gas, additives or the like can be conveyed directly into the outlet 3 and added to the melt.
  • the plug 5 has the basic shape of a circle in cross section.
  • a rib 5c is formed on the stopper 5, in which a further axial channel 5d extends.
  • a thermocouple 6 with its measuring lines is accommodated in this axial channel 5d.
  • the wall thickness of this channel 5d is comparatively thin and is at most 15 mm.
  • thermocouple 6 Since the thermocouple 6 is located immediately above the stopper cap 5a and the wall thickness in the area of the thermocouple 6 is small on all sides and the thermocouple 6 with as little play as possible in the channel 5d is to sit, it is ensured that the temperature of the casting vessel 1 leaving the outlet 3 is determined very quickly and very accurately.
  • the manufacturing effort for the stopper with integrated temperature measurement is low.
  • the molding of the bulge 5c does not require any additional effort in the usual pressing of the refractory material into the plug 5.
  • the channel 5d is either drilled or molded during the pressing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Abstract

The invention relates to a refractory stopper for a metallurgical vessel used in casting. The stopper 5, which can have a central axial channel 5b, has an axial channel 5d which ends eccentrically before the stopper cap 5a and is situated in an axially extending rib 5c formed integrally on the stopper 5. Accommodated in this other axial channel 5d is a thermocouple 6 with its instrument leads.

Description

Die Erfindung bezieht sich auf einen aus Feuerfestmaterial bestehenden Stopfen in Form einer Stange für ein metallurgisches Gießgefäß insbesondere mit einem zu einem Ausgang in der Stopfenkappe führenden axialen Kanal für Gas, Zusatzstoffe od.dgl., wie aus der US-A-3 200 457 bekannt.The invention relates to a stopper made of refractory material in the form of a rod for a metallurgical casting vessel, in particular with an axial channel for gas, additives or the like leading to an outlet in the stopper cap, as is known from US Pat. No. 3,200,457 .

Beim Gießen ist die Überwachung der Gießtemperatur der Schmelze, insbesondere der das Gießgefäß über dessen Auslaß verlassenden Schmelze, wichtig. Deshalb ist bei einem anderen bekannten Gießgefäß vorgesehen, zwischen dem Auslaß des Gießgefäßes und einem die Schmelze zuführenden Gießstrahlschutzrohr eine Temperaturmeßeinrichtung in Form eines in einem Schutzrohr aus Feuerfestmaterial angeordneten Thermoelementes anzuordnen. Dieses Schutzrohr ist auf einer Abdeckung des Gießgefäßes montiert. Bei der Vorbereitung eines jeden Gusses ist es erforderlich, diese Meßeinrichtung zu installieren. Die Manipulation mit dem Schutzrohr auf dem Deckel des Gießgefäßes ist für die Bedienungspersonen umständlich. Hinzu kommt, daß bei dicken Schlackendecken auf dem Stahlbad das wegen des geforderten geringen Wärmeisolationswiderstandes dünnwandig ausgebildete Schutzrohr und das darin befindliche Thermoelement leicht beschädigt wird.When casting, it is important to monitor the pouring temperature of the melt, especially the melt leaving the casting vessel through its outlet. Therefore, in another known casting vessel, a temperature measuring device in the form of a thermocouple arranged in a protective tube made of refractory material is arranged between the outlet of the casting vessel and a pouring jet protective tube that supplies the melt. This protective tube is mounted on a cover of the casting vessel. When preparing each casting, it is necessary to use this measuring device to install. The manipulation with the protective tube on the lid of the casting vessel is cumbersome for the operators. In addition, in the case of thick slag ceilings on the steel bath, the protective tube, which is thin-walled due to the required low thermal insulation resistance, and the thermocouple located therein are easily damaged.

Ferner ist es bekannt, das Thermoelement mit den Meßleitungen in einem zentralen, unten verschlossenen axialen Kanal eines als Stange ausgebildeten Stopfens unterzubringen. Der Nachteil bei dieser Art der Anordnung besteht darin, daß es nicht möglich ist, über den Stopfen Gas und/oder Zusatzstoffe der Schmelze zuzuführen, und daß das Thermoelement wegen der dicken Wandung der Stopfenstange die Temperatur der Schmelze nur mit einer gewissen Zeitverzögerung und ungenau anzeigt.Furthermore, it is known to accommodate the thermocouple with the measuring lines in a central axial channel, which is closed at the bottom, of a plug designed as a rod. The disadvantage of this type of arrangement is that it is not possible to supply gas and / or additives to the melt via the stopper and that the thermocouple only indicates the temperature of the melt with a certain time delay and inaccurately because of the thick wall of the stopper rod .

Der Erfindung liegt die Aufgabe zugrunde, eine Einrichtung zur Temperaturmessung in einem metallurgischen Gießgefäß zu schaffen, die bei geringem Herstellungsaufwand robust ist und die Temperatur der über den Ausgang das Gießgefäß verlassenen Schmelze möglichst genau anzeigt.The invention has for its object to provide a device for temperature measurement in a metallurgical casting vessel, which is robust with little manufacturing effort and the temperature of the melt leaving the casting vessel as accurately as possible indicates.

Diese Aufgabe wird erfindungsgemäß bei einem Stopfen der eingangs genannten Art dadurch gelöst, daß im Stopfen exzentrisch ein vor der Stopfenkappe endender axialer Kanal vorgesehen ist, in dem ein Thermoelement mit Meßleitungen untergebracht ist.This object is achieved with a stopper of the type mentioned in that an axial channel ending in front of the stopper cap is provided in the stopper, in which a thermocouple with measuring lines is accommodated.

Bei dem erfindungsgemäßen Stopfen ist der für die Unterbringung des Thermoelementes und der Meßleitungen erforderliche zusätzliche Aufwand gering. Das Thermoelement mit seinen Meßleitungen profitiert von der ohnehin notwendigen konstruktiven Robustheit des Stopfens. Deshalb kann die Wandstärke, wo das Thermoelement mit den Meßleitungen untergebracht ist, sehr gering sein, was der Forderung nach einer möglichst kleinen Verzögerungszeit bei der Temperaturmessung und der Meßgenauigkeit zugute kommt. Für die Meßgenauigkeit ist ferner von Vorteil, daß die Temperatur unmittelbar vor dem Auslaß des Gießgefäßes gemessen wird. Dies ist insbesondere dann von Vorteil, wenn das Gießgefäß mehrere Auslasse hat, wie es bei einer mehrsträngigen Gießanlage der Fall ist. In diesem Fall kann für jeden Auslaß individuell die Temperatur gemessen werden. Schließlich entfallen bei der Erfindung die sonst notwendigen Halterungs- und Installationsmittel für das Thermoelement und dessen Zuleitungen. Da der axiale Kanal für das Thermoelement exzentrisch im Stopfen angeordnet ist, bleibt auch genügend Raum für die Unterbringung des weiteren bis zu einem Ausgang in der Stopfenkappe führenden axialen Kanal für Gas, Zusatzstoffe od.dgl., so daß der Stopfen eine Doppelfunktion erfüllen kann.In the plug according to the invention, the additional effort required for accommodating the thermocouple and the measuring lines is low. The thermocouple with its measuring lines benefits from the necessary structural robustness of the plug. That's why The wall thickness where the thermocouple with the measuring lines is housed can be very small, which benefits the requirement for the smallest possible delay in temperature measurement and measuring accuracy. For the accuracy of measurement it is also advantageous that the temperature is measured immediately before the outlet of the casting vessel. This is particularly advantageous if the casting vessel has several outlets, as is the case with a multi-strand casting system. In this case, the temperature can be measured individually for each outlet. Finally, the otherwise necessary mounting and installation means for the thermocouple and its supply lines are omitted in the invention. Since the axial channel for the thermocouple is arranged eccentrically in the stopper, there is also enough space for accommodating the further axial channel for gas, additives or the like leading to an outlet in the stopper cap, so that the stopper can fulfill a double function.

Nach einer Ausgestaltung der Erfindung weist der Stopfen oberhalb der Stopfenkappe eine sich in axialer Richtung erstreckende, angeformte Rippe auf, in der sich der Kanal für das Thermoelement befindet. Diese Rippe ist deshalb von Vorteil, weil sich in diesem Fall über etwa den halben Umfang eine für die Wärmeleitung geringe, insbesondere gleichmäßig dicke Wandstärke erzielen läßt. Die Wandstärke der Rippe sollte höchstens 15 mm betragen.According to one embodiment of the invention, the stopper above the stopper cap has an integrally formed rib which extends in the axial direction and in which the channel for the thermocouple is located. This rib is advantageous because, in this case, a wall thickness which is small, in particular uniformly thick, for heat conduction can be achieved over approximately half the circumference. The wall thickness of the rib should not exceed 15 mm.

Im folgenden wird die Erfindung anhand einer ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert.The invention is explained in more detail below with reference to a drawing which represents an exemplary embodiment.

Im einzelnen zeigen:

Fig. 1
ein Gießgefäß mit einem Gießstrahlschutzrohr für die zuzuführende Schmelze und einem Stopfen im Vertikalschnitt und Seitenansicht in schematischer Darstellung,
Fig. 2
der Stopfen gemäß Fig. 1 in vergrößerter Darstellung im Axialschnitt und
Fig. 3
der Stopfen gemäß Fig. 2 im Querschnitt nach Linie I-I der Fig. 2.
In detail show:
Fig. 1
a pouring vessel with a pouring jet protection tube for the melt to be fed and a stopper in vertical section and side view in a schematic representation,
Fig. 2
1 in an enlarged view in axial section and
Fig. 3
2 in cross section along line II of FIG. 2nd

In ein Gießgefäß 1 wird über ein Gießstrahlschutzrohr 2 schmelzflüssiges Metall eingeführt, das über einen Auslaß 3 aus dem Gefaß 1 fließt. Das Gießgefäß 1 ist durch einen Deckel 4 abgedeckt. Ein Stopfen 5 in Form einer Stange, der über einen Tragarm 6 von einem heb- und senkbaren Antrieb 7 getragen ist, taucht über eine Öffnung in dem Deckel 4 in die Schmelze ein. Mit der am unteren Ende des Stopfens 5 ausgebildeten Stopfenkappe 5a kann der Auslaß 3 verschlossen werden.Molten metal is introduced into a casting vessel 1 via a pouring jet protection tube 2 and flows out of the vessel 1 via an outlet 3. The casting vessel 1 is covered by a lid 4. A stopper 5 in the form of a rod, which is carried by a lifting arm 6 which can be raised and lowered, is immersed in the melt through an opening in the cover 4. The outlet 3 can be closed with the stopper cap 5a formed at the lower end of the stopper 5.

Durch den aus gepreßtem Feuerfestmaterial geformten Stopfen 5 erstreckt sich ein axialer zentraler Kanal 5b, über den Gas, Zusatzstoffe od. dgl. direkt in den Auslaß 3 gefördert und der Schmelze zugesetzt werden können. Der Stopfen 5 hat im Querschnitt die Grundform eines Kreises. Oberhalb der Stopfenkappe 5a ist am Stopfen 5 eine Rippe 5c angeformt, in der ein weiterer axialer Kanal 5d sich erstreckt. In diesem axialen Kanal 5d ist ein Thermoelement 6 mit seinen Meßleitungen untergebracht. Die Wandstärke dieses Kanals 5d ist vergleichsweise dünn und beträgt höchstens 15 mm. Da das Thermoelement 6 sich unmittelbar oberhalb der Stopfenkappe 5a befindet und die Wandstärke im Bereich des Thermoelementes 6 allseits klein ist und das Thermoelement 6 mit möglichst wenig Spiel in dem Kanal 5d sitzen soll, ist gewährleistet, daß die Temperatur der das Gießgefäß 1 über den Auslaß 3 verlassenden Schmelze sehr schnell und sehr genau festgestellt wird.Through the plug 5 formed from pressed refractory material, an axial central channel 5b extends through which gas, additives or the like can be conveyed directly into the outlet 3 and added to the melt. The plug 5 has the basic shape of a circle in cross section. Above the stopper cap 5a, a rib 5c is formed on the stopper 5, in which a further axial channel 5d extends. A thermocouple 6 with its measuring lines is accommodated in this axial channel 5d. The wall thickness of this channel 5d is comparatively thin and is at most 15 mm. Since the thermocouple 6 is located immediately above the stopper cap 5a and the wall thickness in the area of the thermocouple 6 is small on all sides and the thermocouple 6 with as little play as possible in the channel 5d is to sit, it is ensured that the temperature of the casting vessel 1 leaving the outlet 3 is determined very quickly and very accurately.

Der Herstellungsaufwand für den Stopfen mit integrierter Temperaturmessung ist gering. Die Anformung der Ausbuchtung 5c erfordert bei dem üblichen Verpressen des Feuerfestmaterials zum Stopfen 5 keinen zusätzlichen Aufwand. Entweder wird der Kanal 5d gebohrt oder beim Verpressen angeformt.The manufacturing effort for the stopper with integrated temperature measurement is low. The molding of the bulge 5c does not require any additional effort in the usual pressing of the refractory material into the plug 5. The channel 5d is either drilled or molded during the pressing.

Claims (3)

  1. A plug (5) made of refractory material in the form of a rod for a metallurgical casting vessel (1), the plug more particularly being formed with an axial channel (5b) for gas, additives and the like which extends to an outlet (5d') in the plug cap (5a), characterized in that the plug (5) is formed eccentrically with an axial channel (5d) which terminates in front of the plug cap (5a) and in which a thermocouple (6) with measuring cables is accommodated.
  2. A plug according to claim 1, characterized in that the plug (5) has above the plug cap (5a) an axially extending formed-on rib (5c) which is formed with the channel (5d) for the thermocouple (6).
  3. A plug according to claim 2, characterized in that the wall thickness of the rib (5c) is 15 mm at the most.
EP92119190A 1991-12-23 1992-11-10 Slopper for metallurgical vessels Expired - Lifetime EP0551581B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4142773A DE4142773A1 (en) 1991-12-23 1991-12-23 PLUG FOR METALLURGICAL VESSELS
DE4142773 1991-12-23

Publications (2)

Publication Number Publication Date
EP0551581A1 EP0551581A1 (en) 1993-07-21
EP0551581B1 true EP0551581B1 (en) 1997-01-02

Family

ID=6448019

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92119190A Expired - Lifetime EP0551581B1 (en) 1991-12-23 1992-11-10 Slopper for metallurgical vessels

Country Status (11)

Country Link
US (1) US5361825A (en)
EP (1) EP0551581B1 (en)
AT (1) ATE146998T1 (en)
AU (1) AU660889B2 (en)
CA (1) CA2085334C (en)
CZ (1) CZ283474B6 (en)
DE (2) DE4142773A1 (en)
ES (1) ES2096702T3 (en)
NZ (1) NZ245267A (en)
PL (1) PL168203B1 (en)
SK (1) SK280801B6 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5544695A (en) * 1993-06-01 1996-08-13 Harasym; Michael Antivortexing nozzle system for pouring molten metal
NL1001976C2 (en) * 1995-12-22 1997-06-24 Hoogovens Groep Bv Method and device for continuous casting of steel.
US5645121A (en) * 1996-01-05 1997-07-08 National Steel Corporation Method of continuous casting using sealed tundish and improved tundish seal
US5827474A (en) * 1997-01-02 1998-10-27 Vesuvius Crucible Company Apparatus and method for measuring the depth of molten steel and slag
CN102308191B (en) * 2009-02-18 2014-06-18 贺利氏电子耐特国际股份公司 Temperature measuring device
DE502009000331D1 (en) * 2009-03-23 2011-03-03 Refractory Intellectual Prop Fireproof ceramic plug
DE102014012698B8 (en) 2014-09-01 2016-07-14 Minkon GmbH Measuring device for the optical temperature determination of a molten metal
PL3433039T3 (en) * 2016-03-21 2022-05-30 Refractory Intellectual Property Gmbh & Co. Kg Ceramic refractory stopper
CN108213400A (en) 2016-12-12 2018-06-29 维苏威集团有限公司 Equipped with the stopper of the temperature measuring equipment of one

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE583497C (en) * 1932-04-06 1933-09-05 Otto & Co Gmbh Dr C Stopper rod for ladles
US3200457A (en) * 1964-03-09 1965-08-17 United States Steel Corp Method of regulating the discharge of molten metal from ladles
US3413852A (en) * 1965-02-12 1968-12-03 Barnes Eng Co Radiometer and oxygen lance combination
FR1459610A (en) * 1965-04-12 1966-11-18 Electro Nite Engineering Co Temperature detector combined with a device for taking a sample
US3373910A (en) * 1965-10-20 1968-03-19 Crawford B. Murton Stopper rod with temperature responsive cooling means
DE2912311A1 (en) * 1979-03-28 1980-10-09 Annawerk Gmbh Casting vessel fitted with stopper rod contg. thermocouple - for measuring temp. of molten metal just above bottom pour outlet nozzle
SU1022035A1 (en) * 1981-11-27 1983-06-07 Донецкий научно-исследовательский институт черной металлургии Pickup for measuring activity of oxygen in metal
US4433832A (en) * 1982-12-27 1984-02-28 Inland Enterprises, Inc. Metallurgical lance
FR2546625B1 (en) * 1983-05-25 1986-02-21 Daussan & Co DEVICE FOR COLLECTING LIQUID METAL SAMPLES AND / OR MEASURING THE TEMPERATURE AND / OR THE OXYGEN CONTENT AND OTHER LIQUID METAL ELEMENTS AND ITS MANUFACTURING METHOD
DE3545763A1 (en) * 1985-12-21 1987-06-25 Didier Werke Ag GAS PUMP PLUG FOR A MELTING VESSEL

Also Published As

Publication number Publication date
ATE146998T1 (en) 1997-01-15
DE59207810D1 (en) 1997-02-13
CZ377292A3 (en) 1993-06-16
CA2085334C (en) 2003-03-18
AU660889B2 (en) 1995-07-06
NZ245267A (en) 1995-08-28
EP0551581A1 (en) 1993-07-21
US5361825A (en) 1994-11-08
CA2085334A1 (en) 1993-06-24
ES2096702T3 (en) 1997-03-16
PL296913A1 (en) 1993-07-26
SK377292A3 (en) 1996-05-08
DE4142773A1 (en) 1993-06-24
SK280801B6 (en) 2000-07-11
PL168203B1 (en) 1996-01-31
CZ283474B6 (en) 1998-04-15
AU2968492A (en) 1993-06-24

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