EP1228250A1 - Gas stopper brick for metallurgical vessels with a sealing body that is subject to screw pressure springs - Google Patents

Gas stopper brick for metallurgical vessels with a sealing body that is subject to screw pressure springs

Info

Publication number
EP1228250A1
EP1228250A1 EP00969459A EP00969459A EP1228250A1 EP 1228250 A1 EP1228250 A1 EP 1228250A1 EP 00969459 A EP00969459 A EP 00969459A EP 00969459 A EP00969459 A EP 00969459A EP 1228250 A1 EP1228250 A1 EP 1228250A1
Authority
EP
European Patent Office
Prior art keywords
gas
sheet metal
metal cover
section
purging plug
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.)
Granted
Application number
EP00969459A
Other languages
German (de)
French (fr)
Other versions
EP1228250B1 (en
Inventor
Jürgen KUHLMANN
Eberhard Heimann
Klaus Ruwier
Rainer Patron
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.)
Wuelfrather Feuerfest und Dolomitwerke & Co Kg GmbH
Dolomitwerke GmbH
Original Assignee
Wuelfrather Feuerfest und Dolomitwerke & Co Kg GmbH
Dolomitwerke 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 Wuelfrather Feuerfest und Dolomitwerke & Co Kg GmbH, Dolomitwerke GmbH filed Critical Wuelfrather Feuerfest und Dolomitwerke & Co Kg GmbH
Publication of EP1228250A1 publication Critical patent/EP1228250A1/en
Application granted granted Critical
Publication of EP1228250B1 publication Critical patent/EP1228250B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/48—Bottoms or tuyéres of converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor

Definitions

  • the invention relates to a gas purging plug for metallurgical vessels with a porous, gas-permeable molded block made of refractory material, a gas-tight partial casing surrounding it, which is formed from a sheet metal jacket extending around the lateral peripheral surface of the molded block and a sheet metal cover covering the outer end face of the molded block, and a gas supply pipe which extends from the underside of the sheet metal cover and which is connected to the sheet metal cover in the region of a gas inlet opening formed in the sheet metal cover and has a narrowed cross section at a distance from the gas inlet opening of the sheet metal cover, an at least one in the pipe section between the sheet metal cover and the narrowed cross section in the axial direction of the gas supply pipe movable closure body is arranged, the cross section of which is smaller than the inner diameter of the gas supply pipe and larger than the narrowed cross section and which correspondingly e in a non-return valve is loaded by a helical compression spring supported on the sheet metal cover in
  • the object of the present invention is to provide a gas purging plug of the type mentioned at the outset which, on the one hand, minimizes the risk of melt breakthroughs and, on the other hand, ensures reliable gas supply even with high gas volume flows with a correspondingly high gas pressure.
  • This object is achieved in that the gas inlet opening is at least partially arranged outside the pitch circle of the compression spring.
  • the solution according to the invention results in a sink which both minimizes the risk of melt breakthroughs and also ensures a gas supply from the gas supply pipe into the sink in the case of a helical compression spring which is completely compressed due to high gas pressure.
  • gas inlet opening consists of three bores, the central axes of which are each arranged eccentrically to the central axis of the gas supply pipe.
  • the central axes of the bores can preferably lie on a common circle and be evenly spaced from one another.
  • valve seat is formed in one piece with the gas supply pipe. This reduces the number of individual parts to be connected to one another, which correspondingly reduces the manufacturing and storage costs for the gas purging plug.
  • the sheet metal cover is plate-shaped and has a depression which, together with the underside of the shaped block, defines a cavity.
  • the depression can preferably be produced using a suitable press. This also allows the number of individual parts to be connected to one another to be reduced.
  • Fig. 1 is a cross-sectional view of a gas purging plug according to the invention with a molded block made of refractory material, and
  • FIG. 2 shows a top view of the gas purging plug according to FIG. 1, the molded block being omitted for the sake of clarity.
  • the gas purging plug shown in the drawing consists of a frustoconical, gas-permeable molded block 1.
  • the gas purging plug serves to introduce purging gas, such as argon, into a metallurgical vessel (not shown). lend molten metal.
  • the gas purging plug is installed in the floor or wall of the metallurgical vessel.
  • the frustoconical shaped block 1 is encased in a gas-tight partial cladding, which is welded together from a sheet metal jacket 2 extending around the lateral U-shaped surface of the shaped block 1 and a sheet metal cover 3 covering the outer end face of the shaped block 1. It can be seen that the sheet metal cover 3 is plate-shaped and has a recess 4 which, together with the underside of the shaped block 1, defines a cavity 5.
  • a gas supply pipe 6 is arranged on the underside of the metal cover 3 and is welded to the metal cover 3 in the region of a gas inlet opening 1 formed in the metal cover 3. At its end facing away from the sheet metal cover 3, the gas supply pipe 6 is provided with an internal thread 8 for connecting a gas line (not shown). Alternatively or additionally, an external thread can also be formed on the gas supply pipe 6.
  • the gas supply pipe 6 has a narrowed cross-section 9, a closure body in the form of a ball 10 being arranged in the axial direction of the gas supply pipe 6 being arranged in the pipe section between the sheet metal cover 3 and the narrowed cross-section 9.
  • the narrowed cross section 9 of the gas supply pipe 6 defines a conical valve seat 11 which is formed in one piece with the gas supply pipe 6.
  • the ball 10 is loaded according to a check valve by a helical compression spring 12 supported on the sheet metal cover 3 in the direction of the valve seat 11.
  • the helical compression spring 12 is dimensioned such that a free annular space 13 is present between the inner wall of the gas supply pipe 6 and the spring 12.
  • the gas inlet opening 7 is arranged with respect to the gas supply pipe 6 and the helical compression spring 12 so that it is partially outside the pitch circle of the helical compression spring 12.
  • the gas inlet opening 7 consists of three bores 14, 15, 16, the central axes of which are each arranged eccentrically to the central axis of the gas supply pipe 6.
  • the central axes of the bores 14, 15, 16 lie on a common circle and are evenly spaced from one another (cf. FIG. 2).
  • the gas purging plug is preferably produced in such a way that the frustoconical shaped block 1 is first shrunk into the conical sheet metal jacket 2.
  • the plate-shaped sheet metal cover 3 is then welded to the sheet metal jacket 2.
  • the gas supply pipe 6 can already be welded to the sheet metal cover 3 with the helical compression spring 12 and the sealing ball 10.

Abstract

This invention relates to a gas bubbler stone for metallurgical vessels having a porous, gas-permeable molded stone (1) made of a refractory material, a partial sheathing enclosing it in a gastight manner, the sheathing being made of a metal casing (2), which extends around the lateral peripheral surface of the molded stone, and a sheet metal cover (3) which covers the outer end face of the molded stone, and a gas delivery pipe (6) which extends from the under side of the sheet metal cover and is joined to the sheet metal cover in the area of a gas inlet opening (7) formed in the sheet metal cover, and which has a narrowed cross section (9) at a distance from the gas inlet opening of the sheet metal cover, and a closing body (10), which is movable at least in the axial direction of the gas delivery pipe, is situated in the pipe section between the sheet metal cover (3) and the narrowed cross section (9), its cross section being smaller than the inside diameter of the gas delivery pipe (6) and greater than the narrowed cross section, and which, like a non-return valve, is loaded in the direction of the narrowed cross section which defines a valve seat (11) by a helical compression spring (12) which is supported on the sheet metal cover. To guarantee a reliable gas supply even at a high gas pressure, the gas inlet opening (7) is situated at least partially outside the partial circle of the helical compression spring (12).

Description

GASSPÜLSTEIN FÜR METALLURGISCHE GEFÄSSE MIT DURCH SCHRAUBENDRUCKFEDER BE¬ AUFSCHLAGTEM VERSCHLUSSKÖRPERA purge plug FOR METALLURGICAL VESSELS WITH BY BOLTS SPRING BE ¬ AUFSCHLAGTEM CLOSURE BODY
Die Erfindung betrifft einen Gasspülstein für metallurgische Gefäße mit einem porösen, gasdurchlässigen Formstein aus feuerfestem Material, einer diesen umgebenden gasdichten Teilumklei- dung, die aus einem sich um die seitliche Umfangsflache des Formsteins erstreckenden Blechmantel und einem die äußere Stirnfläche des Formsteins überdeckenden Blechdeckel gebildet ist, und einem sich von der Unterseite des Blechdeckels erstreckenden Gaszuführungsrohr, das im Bereich einer im Blechdeckel ausgebildeten Gaseintrittsöffnung mit dem Blechdeckel verbunden ist und im Abstand von der Gaseintrittsöffnung des Blechdeckels einen verengten Querschnitt aufweist, wobei in dem Rohrabschnitt zwischen dem Blechdeckel und dem verengten Querschnitt ein zumindest in Axialrichtung des Gaszuführungsrohres beweglicher Verschlußkörper angeordnet ist, dessen Querschnitt kleiner als der Innendurchmesser des Gaszuführungsrohres und größer als der verengte Querschnitt ist und der entsprechend einem Rückschlagventil durch eine an dem Blechdeckel abgestützte Schraubendruckfeder in Richtung des einen Ventilsitz definierenden verengten Querschnitts belastet ist. Ein derartiger Gasspülstein ist aus der DE 33 41 446 Cl bekannt. Mit diesem Gasspülstein lassen sich Durchbrüche derThe invention relates to a gas purging plug for metallurgical vessels with a porous, gas-permeable molded block made of refractory material, a gas-tight partial casing surrounding it, which is formed from a sheet metal jacket extending around the lateral peripheral surface of the molded block and a sheet metal cover covering the outer end face of the molded block, and a gas supply pipe which extends from the underside of the sheet metal cover and which is connected to the sheet metal cover in the region of a gas inlet opening formed in the sheet metal cover and has a narrowed cross section at a distance from the gas inlet opening of the sheet metal cover, an at least one in the pipe section between the sheet metal cover and the narrowed cross section in the axial direction of the gas supply pipe movable closure body is arranged, the cross section of which is smaller than the inner diameter of the gas supply pipe and larger than the narrowed cross section and which correspondingly e in a non-return valve is loaded by a helical compression spring supported on the sheet metal cover in the direction of the narrowed cross section defining a valve seat. Such a gas purging plug is known from DE 33 41 446 Cl. With this gas purging plug, breakthroughs of
Schmelze in die angeschlossene Gaszufuhrleitung weitestgehend verhindern bzw. in ihrer Auswirkung mindern. Allerdings ist der bekannte Gasspülstein insofern problematisch, als daß diePrevent the melt in the connected gas supply line as far as possible or reduce its impact. However, the known gas purging plug is problematic in that the
Gaseintrittsöffnung bei hohen Gasdrücken, die zu einem vollständigen Zusammenpressen der Schraubendruckfeder führen, durch die Schraubendruckfeder verschlossen ist. Somit besteht die Gefahr, daß die Gaszufuhr gerade dann, wenn ein relativ hoher Gasvolumenstrom benötigt wird, unterbrochen wird.Gas inlet opening at high gas pressures, which lead to a complete compression of the helical compression spring, is closed by the helical compression spring. There is therefore a risk that the gas supply will be interrupted even when a relatively high gas volume flow is required.
Aufgabe der vorliegenden Erfindung ist es, einen Gasspülstein der eingangs genannten Art zu schaffen, der einerseits die Gefahr von Schmelzendurchbrüchen minimiert und der andererseits eine sichere Gaszufuhr auch bei hohen Gasvolumenströmen mit einem entsprechend hohen Gasdruck gewährleistet.The object of the present invention is to provide a gas purging plug of the type mentioned at the outset which, on the one hand, minimizes the risk of melt breakthroughs and, on the other hand, ensures reliable gas supply even with high gas volume flows with a correspondingly high gas pressure.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Gaseintrittsöffnung zumindest teilweise außerhalb des Teilkreises der Druckfeder angeordnet wird.This object is achieved in that the gas inlet opening is at least partially arranged outside the pitch circle of the compression spring.
Die erfindungsgemäße Lösung ergibt einen Spülstein, der sowohl die Gefahr von Schmelzendurchbrüchen minimiert als auch eine Gaszufuhr vom Gaszuführungsrohr in den Spülstein im Falle einer aufgrund hohen Gasdrucks vollständig zusammengepreßten Schraubendruckfeder sicherstellt .The solution according to the invention results in a sink which both minimizes the risk of melt breakthroughs and also ensures a gas supply from the gas supply pipe into the sink in the case of a helical compression spring which is completely compressed due to high gas pressure.
Eine vorteilhafte Ausgestaltung des erfindungsgemäßen Gasspülsteins ist dadurch gekennzeichnet, daß die Gaseintrittsöffnung aus drei Bohrungen besteht, deren Mittelachsen jeweils exzentrisch zur Mittelachse des Gaszuführungsrohres angeordnet sind. Die Mittelachsen der Bohrungen können dabei vorzugsweise auf einem gemeinsamen Kreis liegen und voneinander gleichmäßig beabstandet sein. Hierdurch wird zum einen ein relativ großer Gesamtöffnungsquerschnitt und zum anderen ein stabiles Widerlager für die Schraubendruckfeder im Bereich der durch die Bohrungen gebildeten Gaseintrittsöffnung an dem Blechdeckel erzielt .An advantageous embodiment of the gas purging plug according to the invention is characterized in that the gas inlet opening consists of three bores, the central axes of which are each arranged eccentrically to the central axis of the gas supply pipe. The central axes of the bores can preferably lie on a common circle and be evenly spaced from one another. As a result, on the one hand a relatively large total opening cross section and on the other hand a stable abutment for the helical compression spring in the region of the Bores formed gas inlet opening achieved on the sheet metal cover.
Eine weitere vorteilhafte Ausgestaltung des erfindungsgemäßen Gasspülsteins besteht darin, daß der Ventilsitz mit dem Gaszuführungsrohr einstückig ausgebildet ist. Hierdurch reduziert sich die Anzahl der miteinander zu verbindenden Einzelteile, was die Herstellungs- und Lagerkosten für den Gasspülstein entsprechend verringert.A further advantageous embodiment of the gas purging plug according to the invention is that the valve seat is formed in one piece with the gas supply pipe. This reduces the number of individual parts to be connected to one another, which correspondingly reduces the manufacturing and storage costs for the gas purging plug.
Nach einer weiteren bevorzugten Ausgestaltung ist vorgesehen, daß der Blechdeckel tellerförmig ausgebildet ist und eine Vertiefung aufweist, die zusammen mit der Unterseite des Formsteins einen Hohlraum definiert. Die Vertiefung kann vorzugsweise mittels einer geeigneten Presse hergestellt werden. Auch hierdurch läßt sich die Anzahl der miteinander zu verbindenden Einzelteile verringern.According to a further preferred embodiment, it is provided that the sheet metal cover is plate-shaped and has a depression which, together with the underside of the shaped block, defines a cavity. The depression can preferably be produced using a suitable press. This also allows the number of individual parts to be connected to one another to be reduced.
Weitere bevorzugte und vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.Further preferred and advantageous embodiments of the invention are specified in the subclaims.
Nachfolgend wird die Erfindung anhand einer ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert. Im einzelnen zeigen :The invention is explained in more detail below on the basis of a drawing illustrating an exemplary embodiment. In detail show:
Fig. 1 eine Querschnittansicht auf einen erfindungsgemäßen Gasspülstein mit einem Formstein aus feuerfestem Material, undFig. 1 is a cross-sectional view of a gas purging plug according to the invention with a molded block made of refractory material, and
Fig. 2 eine Draufsicht auf den Gasspülstein gemäß Fig. 1, wobei der Formstein der Übersichlichkeit halber weggelassen ist.FIG. 2 shows a top view of the gas purging plug according to FIG. 1, the molded block being omitted for the sake of clarity.
Der in der Zeichnung dargestellte Gasspülstein besteht aus einem kegelstumpfförmigen, gasdurchlässigen Formstein 1. Der Gasspülstein dient der Einleitung von Spülgas, wie z.B. Argon, in eine in einem metallurgischen Gefäß (nicht gezeigt) befind- liehe Metallschmelze. Hierzu wird der Gasspülstein in den Boden oder die Wand des metallurgischen Gefässes eingebaut.The gas purging plug shown in the drawing consists of a frustoconical, gas-permeable molded block 1. The gas purging plug serves to introduce purging gas, such as argon, into a metallurgical vessel (not shown). lend molten metal. For this purpose, the gas purging plug is installed in the floor or wall of the metallurgical vessel.
Der kegelstumpfförmige Formstein 1 ist in einer gasdichten Teilumkleidung eingefaßt, die aus einem sich um die seitliche U fangsflache des Formsteins 1 erstreckenden Blechmantel 2 und einem die äußere Stirnfläche des Formsteins 1 überdeckenden Blechdeckel 3 zusammengeschweißt ist. Es ist zu erkennen, daß der Blechdeckel 3 tellerförmig ausgebildet ist und eine Vertiefung 4 aufweist, die zusammen mit der Unterseite des Formsteins 1 einen Hohlraum 5 definiert.The frustoconical shaped block 1 is encased in a gas-tight partial cladding, which is welded together from a sheet metal jacket 2 extending around the lateral U-shaped surface of the shaped block 1 and a sheet metal cover 3 covering the outer end face of the shaped block 1. It can be seen that the sheet metal cover 3 is plate-shaped and has a recess 4 which, together with the underside of the shaped block 1, defines a cavity 5.
An der Unterseite des Blechdeckels 3 ist ein Gaszuführungsrohr 6 angeordnet, das im Bereich einer im Blechdeckel 3 ausgebildeten Gaseintrittsöffnung 1 mit dem Blechdeckel 3 verschweißt ist. An seinem dem Blechdeckel 3 abgewandten Ende ist das Gaszuführungsrohr 6 mit einem Innengewinde 8 zum Anschluß einer Gasleitung (nicht gezeigt) versehen. Alternativ oder zusätzlich kann an dem Gaszuführungsrohr 6 auch ein Außengewinde ausgebildet sein.A gas supply pipe 6 is arranged on the underside of the metal cover 3 and is welded to the metal cover 3 in the region of a gas inlet opening 1 formed in the metal cover 3. At its end facing away from the sheet metal cover 3, the gas supply pipe 6 is provided with an internal thread 8 for connecting a gas line (not shown). Alternatively or additionally, an external thread can also be formed on the gas supply pipe 6.
Im Abstand von der Gaseintrittsöffnung 7 weist das Gaszuführungsrohr 6 einen verengten Querschnitt 9 auf, wobei in dem Rohrabschnitt zwischen dem Blechdeckel 3 und dem verengten Querschnitt 9 ein in Axialrichtung des Gaszuführungsrohres 6 beweglicher Verschlußkörper in Form einer Kugel 10 angeordnet ist. Der verengte Querschnitt 9 des Gaszuführungsrohres 6 definiert einen konischen Ventilsitz 11, der einstückig mit dem Gaszuführungsrohr 6 ausgebildet ist.At a distance from the gas inlet opening 7, the gas supply pipe 6 has a narrowed cross-section 9, a closure body in the form of a ball 10 being arranged in the axial direction of the gas supply pipe 6 being arranged in the pipe section between the sheet metal cover 3 and the narrowed cross-section 9. The narrowed cross section 9 of the gas supply pipe 6 defines a conical valve seat 11 which is formed in one piece with the gas supply pipe 6.
Die Kugel 10 ist entsprechend einem Rückschlagventil durch eine an dem Blechdeckel 3 abgestützte Schraubendruckfeder 12 in Richtung des Ventilsitzes 11 belastet. Die Schraubendruckfeder 12 ist so dimensioniert, daß zwischen der Innenwandung des Gaszuführungsrohr 6 und der Feder 12 ein freier Ringraum 13 vorhanden ist. Die Gaseintrittsöffnung 7 ist in bezug auf das Gaszuführungsrohr 6 und die Schraubendruckfeder 12 so angeordnet, daß sie teilweise außerhalb des Teilkreises der Schraubendruckfeder 12 liegt. In dem gezeigten Ausführungsbeispiel besteht die Gaseintrittsöffnung 7 aus drei Bohrungen 14,15,16, deren Mittelachsen jeweils exzentrisch zur Mittelachse des Gaszuführungsrohres 6 angeordnet sind. Die Mittelachsen der Bohrungen 14,15,16 liegen dabei auf einem gemeinsamen Kreis und sind voneinander gleichmäßig beabstandet (vgl. Fig. 2).The ball 10 is loaded according to a check valve by a helical compression spring 12 supported on the sheet metal cover 3 in the direction of the valve seat 11. The helical compression spring 12 is dimensioned such that a free annular space 13 is present between the inner wall of the gas supply pipe 6 and the spring 12. The gas inlet opening 7 is arranged with respect to the gas supply pipe 6 and the helical compression spring 12 so that it is partially outside the pitch circle of the helical compression spring 12. In the exemplary embodiment shown, the gas inlet opening 7 consists of three bores 14, 15, 16, the central axes of which are each arranged eccentrically to the central axis of the gas supply pipe 6. The central axes of the bores 14, 15, 16 lie on a common circle and are evenly spaced from one another (cf. FIG. 2).
Der Gasspülstein wird vorzugsweise in der Weise hergestellt, daß zunächst der kegelstumpfförmige Formstein 1 in den konischen Blechmantel 2 eingeschrumpft wird. Anschließend wird der tellerförmige Blechdeckel 3 mit dem Blechmantel 2 verschweißt. Das Gaszuführungsrohr 6 kann dabei bereits mit der Schraubendruckfeder 12 sowie der Verschlußkugel 10 an dem Blechdeckel 3 angeschweißt sein. The gas purging plug is preferably produced in such a way that the frustoconical shaped block 1 is first shrunk into the conical sheet metal jacket 2. The plate-shaped sheet metal cover 3 is then welded to the sheet metal jacket 2. The gas supply pipe 6 can already be welded to the sheet metal cover 3 with the helical compression spring 12 and the sealing ball 10.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Formstein1 shaped stone
2 Blechmantel2 sheet metal jacket
3 Blechdeckel3 metal covers
4 Vertiefung4 deepening
5 Hohlraum5 cavity
6 Gaszuführungsröhr6 gas supply tube
7 Gaseintrittsöffnung7 gas inlet opening
8 Innengewinde8 internal threads
9 verengter Querschnitt9 narrowed cross section
10 Kugel (Verschlußkörper10 bullet (breech block
11 konischer Ventilsitz11 conical valve seat
12 Schraubendruckfeder12 helical compression spring
13 Ringraum13 annulus
14 Bohrung14 hole
15 Bohrung15 hole
16 Bohrung 16 hole

Claims

Patentansprüche claims
1. Gasspülstein für metallurgische Gefäße mit einem porösen, gasdurchlässigen Formstein (1) aus feuerfestem Material, einer diesen umgebenden gasdichten Teilumkleidung, die aus einem sich um die seitliche Umfangsflache des Formsteins erstreckenden Blechmantel (2) und einem die äußere Stirnfläche des Formsteins überdeckenden Blechdeckel (3) gebildet ist, und einem sich von der Unterseite des Blechdeckels erstreckenden Gaszuführungsrohr (6), das im Bereich einer im Blechdeckel ausgebildeten Gaseintrittsöffnung (7) mit dem Blechdeckel verbunden ist und im Abstand von der Gaseintrittsöffnung des Blechdeckels einen verengten Querschnitt (9) aufweist, wobei in dem Rohrabschnitt zwischen dem Blechdeckel (3) und dem verengten Querschnitt (9) ein zumindest in Axialrichtung des Gaszuführungsrohres beweglicher Verschlußkörper (10) angeordnet ist, dessen Querschnitt kleiner als der Innendurchmesser des Gaszuführungsrohres (6) und größer als der verengte Querschnitt ist und der entsprechend einem Rückschlagventil durch eine an dem Blechdeckel abgestützte Schraubendruckfeder (12) in Richtung des einen Ventilsitz (11) definierenden verengten Querschnitts belastet ist, d a d u r c h g e k e n n z e i c h n e t , daß die Gaseintrittsöffnung (7) zumindest teilweise außerhalb des Teilkreises der Schraubendruckfeder (12) angeordnet ist.1.Gas purging plug for metallurgical vessels with a porous, gas-permeable molded block (1) made of refractory material, a gas-tight partial cladding surrounding it, which consists of a sheet metal jacket (2) extending around the lateral peripheral surface of the molded block and a sheet metal cover covering the outer end face of the molded block ( 3), and a gas supply pipe (6) extending from the underside of the sheet metal cover, which is connected to the sheet metal cover in the area of a gas inlet opening (7) formed in the sheet metal cover and has a narrowed cross section (9) at a distance from the gas inlet opening of the sheet metal cover , In the tube section between the sheet metal cover (3) and the narrowed cross section (9) is arranged at least in the axial direction of the gas supply pipe movable closure body (10), the cross section of which is smaller than the inner diameter of the gas supply pipe (6) and larger than the narrowed cross section and the e Accordingly, a check valve is loaded by a helical compression spring (12) supported on the sheet metal cover in the direction of the narrowed cross section defining a valve seat (11), so that the gas inlet opening (7) is at least partially arranged outside the pitch circle of the helical compression spring (12).
2. Gasspülstein nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß die Gaseintrittsöffnung (7) aus mehreren Bohrungen (14,15,16) besteht, deren Mittelachsen jeweils exzentrisch zur Mittelachse des Gaszuführungsrohres (6) angeordnet sind. 2. Gas purging plug according to claim 1, characterized in that the gas inlet opening (7) consists of several bores (14, 15, 16), the central axes of which are each arranged eccentrically to the central axis of the gas supply pipe (6).
3. Gasspülstein nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t , daß die Gaseintrittsöffnung (7) aus drei Bohrungen (14,15,16) besteht, deren Mittelachsen jeweils exzentrisch zur Mittelachse des Gaszuführungsrohres (6) angeordnet sind.3. Gas purging plug according to claim 1 or 2, so that the gas inlet opening (7) consists of three bores (14, 15, 16), the center axes of which are each arranged eccentrically to the center axis of the gas supply pipe (6).
4. Gasspülstein nach einem der Ansprüche 2 oder 3, d a d u r c h g e k e n n z e i c h n e t , daß die Mittelachsen der Bohrungen (14,15,16) auf einem gemeinsamen Kreis liegen und voneinander gleichmäßig beabstandet sind .4. Gas purging plug according to one of claims 2 or 3, d a d u r c h g e k e n n z e i c h n e t that the central axes of the bores (14,15,16) lie on a common circle and are evenly spaced from each other.
5. Gasspülstein nach einem der Ansprüche 1 bis 4, d a d u r c h g e k e n n z e i c h n e t , daß der Verschlußkörper eine Kugel (10) ist.5. Gas purging plug according to one of claims 1 to 4, d a d u r c h g e k e n n z e i c h n e t that the closure body is a ball (10).
6. Gasspülstein nach einem der Ansprüche 1 bis 5, d a d u r c h g e k e n n z e i c h n e t , daß der Ventilsitz (11) mit dem Gaszuführungsrohr (6) einstückig ausgebildet ist .6. Gas purging plug according to one of claims 1 to 5, d a d u r c h g e k e n n z e i c h n e t that the valve seat (11) with the gas supply pipe (6) is integrally formed.
7. Gasspülstein nach einem der Ansprüche 1 bis 6, d a d u r c h g e k e n n z e i c h n e t , daß der Ventilsitz (11) konisch ausgebildet ist.7. Gas purging plug according to one of claims 1 to 6, d a d u r c h g e k e n n z e i c h n e t that the valve seat (11) is conical.
8. Gasspülstein nach einem der Ansprüche 1 bis 7, d a d u r c h g e k e n n z e i c h n e t , daß der Formstein (1) kegelstumpfförmig ausgebildet und in den entsprechend konisch ausgebildeten Blechmantel (2) eingeschrumpft ist.8. Gas purging plug according to one of claims 1 to 7, d a d u r c h g e k e n n z e i c h n e t that the shaped block (1) is frustoconical and shrunk into the correspondingly conical sheet metal jacket (2).
9. Gasspülstein nach einem der Ansprüche 1 bis 8, d a d u r c h g e k e n n z e i c h n e t , daß der Blechdeckel (3) tellerförmig ausgebildet ist und eine Vertiefung (4) aufweist, die zusammen mit der Unterseite des Formsteins (1) einen Hohlraum (5) definiert.9. gas purging plug according to one of claims 1 to 8, characterized in that the sheet metal cover (3) is plate-shaped and a Has depression (4), which defines a cavity (5) together with the underside of the shaped block (1).
10. Gasspülstein nach einem der Ansprüche 1 bis 9, d a d u r c h g e k e n n z e i c h n e t , daß das Gaszuführungsrohr (6) an seinem dem Blechdeckel (3) abgewandten Ende mit einem Innengewinde (8) und/oder Außengewinde zum Anschluß einer Gasleitung versehen ist. 10. Gas purging plug according to one of claims 1 to 9, d a d u r c h g e k e n n z e i c h n e t that the gas supply pipe (6) at its end facing away from the sheet metal cover (3) is provided with an internal thread (8) and / or external thread for connecting a gas line.
EP00969459A 1999-10-08 2000-10-09 Gas injection stopper brick with sealing body under screw spring pressure for metallurgical vessels Expired - Lifetime EP1228250B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19948848 1999-10-08
DE19948848A DE19948848C1 (en) 1999-10-08 1999-10-08 Nozzle brick for injecting flushing gas into molten metal in a metallurgical vessel has a gas entry opening located at least partially outside the pitch circle of a biasing spring of a non-return valve within a gas supply pipe
PCT/EP2000/009875 WO2001027337A1 (en) 1999-10-08 2000-10-09 Gas stopper brick for metallurgical vessels with a sealing body that is subject to screw pressure springs

Publications (2)

Publication Number Publication Date
EP1228250A1 true EP1228250A1 (en) 2002-08-07
EP1228250B1 EP1228250B1 (en) 2005-01-19

Family

ID=7925176

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00969459A Expired - Lifetime EP1228250B1 (en) 1999-10-08 2000-10-09 Gas injection stopper brick with sealing body under screw spring pressure for metallurgical vessels

Country Status (8)

Country Link
US (1) US6797230B1 (en)
EP (1) EP1228250B1 (en)
AT (1) ATE287454T1 (en)
AU (1) AU7916800A (en)
DE (2) DE19948848C1 (en)
ES (1) ES2235962T3 (en)
TW (1) TW533241B (en)
WO (1) WO2001027337A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009005034U1 (en) 2009-04-06 2009-09-24 Calderys Deutschland Gmbh & Co. Ohg High-temperature check valve for gas flushing

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HUE029621T2 (en) * 2012-08-27 2017-03-28 Refractory Intellectual Property Gmbh & Co Kg Gas purging element with its corresponding gas supply line
MX2015016794A (en) * 2013-06-07 2016-03-31 Vesuvius Crucible Co Lead retaining purge plug.
PL2893992T3 (en) * 2014-01-09 2016-06-30 Refractory Intellectual Property Gmbh & Co Kg Gas flushing element and associated gas connection element

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE679723C (en) 1935-01-16 1939-08-12 Metallgesellschaft Akt Ges Device for the continuous splitting of fats or oils
DE3341446C1 (en) * 1983-11-17 1985-07-11 Brohltal-Deumag AG für feuerfeste Erzeugnisse, 5401 Urmitz Gas flushing stone for metallurgical vessels
DE4411538C1 (en) * 1994-04-02 1995-12-14 Didier Werke Ag Method for producing a gas and / or solid-state blowing device for metallurgical vessels, and blowing device produced according to the method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0127337A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009005034U1 (en) 2009-04-06 2009-09-24 Calderys Deutschland Gmbh & Co. Ohg High-temperature check valve for gas flushing

Also Published As

Publication number Publication date
AU7916800A (en) 2001-04-23
DE19948848C1 (en) 2000-07-13
ATE287454T1 (en) 2005-02-15
ES2235962T3 (en) 2005-07-16
US6797230B1 (en) 2004-09-28
EP1228250B1 (en) 2005-01-19
TW533241B (en) 2003-05-21
DE50009303D1 (en) 2005-02-24
WO2001027337A1 (en) 2001-04-19

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