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EP0148336B1 - Gas flushing plug for metallurgical vessels - Google Patents

Gas flushing plug for metallurgical vessels Download PDF

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Publication number
EP0148336B1
EP0148336B1 EP84112403A EP84112403A EP0148336B1 EP 0148336 B1 EP0148336 B1 EP 0148336B1 EP 84112403 A EP84112403 A EP 84112403A EP 84112403 A EP84112403 A EP 84112403A EP 0148336 B1 EP0148336 B1 EP 0148336B1
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EP
European Patent Office
Prior art keywords
gas
brick
collecting chamber
annular collecting
shaped brick
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
Application number
EP84112403A
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German (de)
French (fr)
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EP0148336A1 (en
Inventor
Hans Dipl.-Ing. Höffgen
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.)
Radex Deutschland AG fur Feuerfes
Original Assignee
RADEX DEUTSCHLAND AG fur FEUERFESTE ERZEUGNISSE
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.)
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Application filed by RADEX DEUTSCHLAND AG fur FEUERFESTE ERZEUGNISSE filed Critical RADEX DEUTSCHLAND AG fur FEUERFESTE ERZEUGNISSE
Priority to AT84112403T priority Critical patent/ATE29044T1/en
Publication of EP0148336A1 publication Critical patent/EP0148336A1/en
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Expired legal-status Critical Current

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    • 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, consisting of a gas-permeable molded block with directed porosity, which can be inserted into the wall or the bottom of the container, which is formed in an annular region of the molded block, and a gas-tight sheet metal casing partially surrounding the molded block, which consists of a lateral circumferential surface of the molded sheet metal jacket and a sheet metal cover covering the outer end face of the molded block is welded together, and a gas supply pipe which is welded to the edge of a central gas inlet opening of the sheet metal cover.
  • Gas flushing blocks are known from the Radex Rundschau, Issue 3, September 1983, Radenthein, which are provided with a directional porosity in a uniform distribution over their entire cross-section.
  • the purging gas penetrates radially outwards through the gap between the outer end face of the shaped block and the sheet metal base and then flows upwards through the pores in accordance with the principle of least constraint and reaches the melt.
  • the individual bores are subjected to the purging gas unevenly, so that the purging stone cannot be optimally used.
  • the object of the invention is to design a gas purging plug in such a way that, in particular, the ring region provided with directed porosity is optimally used for the gas passage.
  • this object is achieved in that an annular collecting space is provided in front of the entry cross section of the ring area with directed porosity, that the connection area of the central gas supply pipe is connected to the annular collecting space via at least one connecting channel running parallel to the outer end face of the shaped block, and in that the connecting channel opens diagonally into the annular collecting space.
  • the construction according to the invention ensures that a uniform pressure distribution is reliably established in front of the entire ring area, which is provided with the directional porosity, so that a uniform flow through the sink is achieved due to the uniform pressure conditions.
  • the tangential flow component generates a rotating gas flow in the annular collecting space, which accelerates the setting of the uniform pressure distribution.
  • the connecting channel is expediently designed in a spiral.
  • a plurality of connecting channels are preferably distributed at uniform intervals over the circumference, all connecting channels opening obliquely into the collecting space at the same angle.
  • the gas inlet opening can be surrounded by a circular inlet space, the connecting channels extending from the inlet space to the annular collecting space.
  • the expanded entry space ensures that all connecting channels distributed over the circumference are acted upon uniformly.
  • the annular collecting space, the entry space and the connecting channels are preferably formed by beaded bulges of the sheet metal cover.
  • This design measure makes it very easy to manufacture all cavities and channels. They can be formed in the lid of the sheet metal casing in a single operation. In addition, this has the advantage for the sheet metal lid that its rigidity is increased considerably, so that it does not suffer any unwanted deformation even when exposed to high purge gas pressures. This ensures that the flow is always smooth and optimal.
  • the gas purging plug 1 essentially consists of a molded block 2 made of porous, refractory material, a sheet metal casing 3 which partially surrounds the molded block 2, and a gas supply pipe 4.
  • the shaped block 2 is frustoconical, the larger end face 5 of the shaped block 2, which in the installed state of the gas flushing block faces the outside of the metallurgical vessel, is the entry side for the flushing gas.
  • a directional porosity is formed in a concentric ring region 6 of the shaped block 2 and consists of a plurality of bores 7 with very small diameters.
  • the shaped block 2 is surrounded on its circumferential surface with a sheet metal jacket 8, while the outer end face 5 of the shaped block is covered with a sheet metal cover 9.
  • the metal cover 9 lies against the outer end face 5 of the shaped block 2 and extends to the outermost edge of the end face 5.
  • the edge of the sheet metal jacket 8 is flanged over the sheet metal cover 9 and connected to it in a gas-tight manner via a circumferential weld seam 10.
  • the sheet metal cover 9 has a gas inlet opening 11, which carries a cylindrical edge projecting in the axial direction.
  • the gas supply pipe 4 is gas-tightly connected to the gas inlet opening 11, the end of the gas supply pipe 4 being positively inserted into the gas inlet opening 11 and connected to the edge 12 in a gas-tight manner via a circumferential weld seam 13.
  • a circular inlet space 14 which is stamped into the sheet metal cover 9. Furthermore, a circumferential, bead-shaped bulge 15 is incorporated into the sheet metal cover, which creates a collecting space 16 between the end face 5 of the shaped block 5 and the cover material, which runs directly in front of the entry cross section of the ring region 6 with directed porosity.
  • the entry space 14 and the collection space 16 are connected to one another via six spiral-arm connecting channels 17.
  • the connecting channels 17 are formed in the same way as the entry space 14 and the collecting space 16 by bead-shaped bulges 18.
  • the six spiral-arm connecting channels 17 are arranged at uniform intervals over the circumference and have the same sense of direction.
  • the sheet metal cover 9 can be produced with all of its bead-shaped bulges in a single operation.
  • the beads give the sheet metal cover 9 very good stability and can therefore withstand considerable pressures without deforming. Also, there is no warping of the cover when the weld seams 10 and 13 are attached.
  • the purging gas entering the inlet space 14 through the gas supply pipe 4 is distributed uniformly over the six connecting channels 17 and from there reaches the collecting space 16. Since the purging gas flows obliquely into the collecting space 16 with a strong tangential component. a circulating gas flow is generated in the collecting space, so that a uniform pressure distribution is achieved with directed porosity in front of the entire inlet cross section of the ring region 6. This ensures that the gas purging plug is flowed through evenly over its circumference.
  • the connecting channels 17 are only about one to two millimeters high.
  • the width of the connecting channels 17 is approximately five to six millimeters.
  • the inlet space surrounding the gas inlet opening, the annular collecting space and the channels connecting the two spaces are formed by recesses on the outer end face of the shaped block.
  • the sheet metal cover can be completely flat.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

A gas bubble brick for metallurgical vessels consists of a gas-permeable shaped brick (2) which can be installed in the wall or the bottom of the vessel and having directed porosity, which is designed in a ring region (6) of the shaped brick, a gas-tight metal encasing (3) partially surrounding the shaped brick (2) and welded together from a metal jacket (8) extending around the lateral circumferential area of the shaped brick and a metal cover (9) covering the outer face of the shaped brick, as well as a gas supply pipe (4), which is welded onto the rim of a central gas inlet orifice (11) of the metal cover. In order to achieve that the ring region (6) with directed porosity is optimally utilized for gas passage, an annular collecting chamber (16) is provided in front of the inlet cross-section of this region (6), the connecting area of the gas supply pipe (4) being joined to the annular collecting chamber (16) via at least one joining channel (17). Preferably, several spiral-armed joining channels (17), arranged at regular intervals around the circumference, are provided so that a circulating flow is generated in the annular collecting chamber (16), ensuring even pressure conditions.

Description

Die Erfindung betrifft einen Gasspülstein für metallurgische Gefäße, bestehend aus einem in die Wand oder den Boden des Gefäßes einsetzbaren gasdurchlässigen Formstein mit gerichteter Porosität, die in einem Ringbereich des Formsteins ausgebildet ist, einer den Formstein teilweise umgebenden gasdichten Blechumkleidung, die aus einem sich um die seitliche Umfangsfläche des Formsteins erstreckenden Blechmantel und einem die äußere Stirnfläche des Formsteins überdeckenden Blechdeckel zusammengeschweißt ist, sowie einem Gaszuführungsrohr, das an den Rand einer mittigen Gaseintrittsöffnung des Blechdeckels angeschweißt ist.The invention relates to a gas purging plug for metallurgical vessels, consisting of a gas-permeable molded block with directed porosity, which can be inserted into the wall or the bottom of the container, which is formed in an annular region of the molded block, and a gas-tight sheet metal casing partially surrounding the molded block, which consists of a lateral circumferential surface of the molded sheet metal jacket and a sheet metal cover covering the outer end face of the molded block is welded together, and a gas supply pipe which is welded to the edge of a central gas inlet opening of the sheet metal cover.

Aus der Radex-Rundschau, Heft 3, September 1983, Radenthein, sind Gasspülsteine bekannt, die über ihren gesamten Querschnitt in gleichmäßiger Verteilung mit einer gerichteten Porosität versehen sind. Bei derartigen Gasspülsteinen wird darauf vertraut, daß das Spülgas durch den Spalt zwischen der äußeren Stirnfläche des Formsteins und dem Blechboden radial nach außen hindurchdringt und dann entsprechend dem Prinzip des geringsten Zwangs durch die Poren nach oben strömt und in die Schmelze gelangt. Dabei besteht jedoch das Problem, daß die einzelnen Bohrungen ungleichmäßig mit dem Spülgas beaufschlagt werden, so daß keine optimale Ausnutzung des Spülsteins erfolgen kann.Gas flushing blocks are known from the Radex Rundschau, Issue 3, September 1983, Radenthein, which are provided with a directional porosity in a uniform distribution over their entire cross-section. In such gas purging stones, it is trusted that the purging gas penetrates radially outwards through the gap between the outer end face of the shaped block and the sheet metal base and then flows upwards through the pores in accordance with the principle of least constraint and reaches the melt. However, there is the problem that the individual bores are subjected to the purging gas unevenly, so that the purging stone cannot be optimally used.

Ferner ist es bekannt, die gerichtete Porosität bei Gasspülsteinen in Ringbereichen anzuordnen. Bei diesen Gasspülsteinen ist jedoch das Problem einer gleichmäßigen Beaufschlagung der Durchgänge über den Ringbereich nicht gelöst.It is also known to arrange the directed porosity in gas flushing stones in ring areas. With these gas purging stones, however, the problem of uniformly loading the passages over the ring area is not solved.

Der Erfindung liegt die Aufgabe zugrunde, einen Gasspülstein derart auszubilden, daß insbesondere der mit gerichteter Porosität versehene Ringbereich optimal für den Gasdurchtritt ausgenutzt wird.The object of the invention is to design a gas purging plug in such a way that, in particular, the ring region provided with directed porosity is optimally used for the gas passage.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß vor dem Eintrittsquerschnitt des Ringbereichs mit gerichteter Porosität ein ringförmiger Sammelraum vorgesehen ist, daß der Anschlußbereich des mittigen Gaszuführungsrohrs über mindestens einen parallel zur äußeren Stirnfläche des Formsteins verlaufenden Verbindungskanal mit dem ringförmigen Sammelraum in Verbindung steht und daß der Verbindungskanal schräg in den ringförmigen Sammelraum mündet.According to the invention, this object is achieved in that an annular collecting space is provided in front of the entry cross section of the ring area with directed porosity, that the connection area of the central gas supply pipe is connected to the annular collecting space via at least one connecting channel running parallel to the outer end face of the shaped block, and in that the connecting channel opens diagonally into the annular collecting space.

Durch die erfindungsgemäße Konstruktion wird erreicht, daß sich vor dem gesamten Ringbereich, der mit der gerichteten Porosität versehen ist, zuverlässig eine gleichmäßige Druckverteilung einstellt, so daß aufgrund der einheitlichen Druckverhältnisse eine gleichmäßige Durchströmung des Spülsteins erzielt wird. Durch die tangentiale Strömungskomponente wird in dem ringförmigen Sammelraum eine rotierende Gasströmung erzeugt, durch die die Einstellung der gleichmäßigen Druckverteilung beschleunigt wird.The construction according to the invention ensures that a uniform pressure distribution is reliably established in front of the entire ring area, which is provided with the directional porosity, so that a uniform flow through the sink is achieved due to the uniform pressure conditions. The tangential flow component generates a rotating gas flow in the annular collecting space, which accelerates the setting of the uniform pressure distribution.

Um die Strömungsführung optimal zu gestalten, ist der Verbindungskanal zweckmäßig spiralförmig ausgebildet. Je nach Größe des Steins sind vorzugsweise mehrere Verbindungskanäle in gleichmäßigen Abständen über den Umfang verteilt angeordnet, wobei sämtliche Verbindungskanäle unter dem gleichen Winkel schräg in den Sammelraum münden.In order to optimally design the flow guidance, the connecting channel is expediently designed in a spiral. Depending on the size of the stone, a plurality of connecting channels are preferably distributed at uniform intervals over the circumference, all connecting channels opening obliquely into the collecting space at the same angle.

Die Gaseintrittsöffnung kann von einem kreisförmigen Eintrittsraum umgeben sein, wobei sich die Verbindungskanäle von dem Eintrittsraum zu dem ringförmigen Sammelraum erstrecken. Durch den erweiterten Eintrittsraum wird eine gleichmäßige Beaufschlagung sämtlicher über den Umfang verteilter Verbindungskanäle erreicht.The gas inlet opening can be surrounded by a circular inlet space, the connecting channels extending from the inlet space to the annular collecting space. The expanded entry space ensures that all connecting channels distributed over the circumference are acted upon uniformly.

Der ringförmige Sammelraum, der Eintrittsraum sowie die Verbindungskanäle sind vorzugsweise durch sickenförmige Ausbauchungen des Blechdeckels gebildet. Durch diese konstruktive Maßnahme ist die Ausbildung sämtlicher Hohlräume und Kanäle sehr einfach herstellbar. Sie können in einem einzigen Arbeitsgang in dem Deckel der Blechumkleidung ausgebildet werden. Darüber hinaus entsteht dadurch für den Blechdeckel der Vorteil, daß seine Steifigkeit erheblich erhöht wird, so daß er selbst bei Beaufschlagung mit hohen Spülgasdrücken keine ungewollte Verformung erleidet. Es ist somit gewährleistet, daß die Strömungsführung stets gleichmäßig und optimal verläuft.The annular collecting space, the entry space and the connecting channels are preferably formed by beaded bulges of the sheet metal cover. This design measure makes it very easy to manufacture all cavities and channels. They can be formed in the lid of the sheet metal casing in a single operation. In addition, this has the advantage for the sheet metal lid that its rigidity is increased considerably, so that it does not suffer any unwanted deformation even when exposed to high purge gas pressures. This ensures that the flow is always smooth and optimal.

Die Erfindung ist in der Zeichnung beispielsweise veranschaulicht und im nachstehenden im einzelnen anhand der Zeichnung beschrieben. Es zeigen :

  • Figur 1 eine Ansicht eines Gasspülsteins in Richtung des Pfeiles aus Fig. 2 und
  • Figur 2 einen Schnitt entlang der Linie 11-11 aus Fig. 1.
The invention is illustrated in the drawing, for example, and described in detail below with reference to the drawing. Show it :
  • Figure 1 is a view of a gas purging plug in the direction of the arrow of Fig. 2 and
  • FIG. 2 shows a section along the line 11-11 from FIG. 1.

Nach der Zeichnung besteht der Gasspülstein 1 im wesentlichen aus einem Formstein 2 aus porösem, feuerfestem Material, einer Blechumkleidung 3, die den Formstein 2 teilweise umgibt, sowie einem Gaszuführungsrohr 4.According to the drawing, the gas purging plug 1 essentially consists of a molded block 2 made of porous, refractory material, a sheet metal casing 3 which partially surrounds the molded block 2, and a gas supply pipe 4.

Der Formstein 2 ist kegelstumpfförmig ausgebildet, wobei die größere Stirnfläche 5 des Formsteins 2, die im eingebauten Zustand des Gasspülsteins zur Außenseite des metallurgischen Gefäßes weist, die Eintrittsseite für das Spülgas ist.The shaped block 2 is frustoconical, the larger end face 5 of the shaped block 2, which in the installed state of the gas flushing block faces the outside of the metallurgical vessel, is the entry side for the flushing gas.

In einem konzentrischen Ringbereich 6 des Formsteins 2 ist eine gerichtete Porosität ausgebildet, die aus einer Mehrzahl von Bohrungen 7 mit sehr kleinen Durchmessern besteht. Die Bohrungen 7, von denen in der Zeichnung nur die Mittellinien angedeutet sind, erstrecken sich von der äußeren Stirnfläche 5 bis zu der im eingebauten Zustand mit der Schmelze in Berührung kommenden inneren Stirnfläche des Formsteins 2.A directional porosity is formed in a concentric ring region 6 of the shaped block 2 and consists of a plurality of bores 7 with very small diameters. The bores 7, of which only the center lines are indicated in the drawing, extend from the outer end face 5 to the inner end face of the molded block 2 which comes into contact with the melt in the installed state.

An seiner Umfangsfläche ist der Formstein 2 mit einem Blechmantel 8 umgeben, während die äußere Stirnfläche 5 des Formsteins mit einem Blechdeckel 9 überdeckt ist. Der Blechdeckel 9 liegt an der äußeren Stirnfläche 5 des Formsteins 2 an und erstreckt sich bis zum äußersten Rand der Stirnfläche 5. In diesem äußeren Bereich ist der Rand des Blechmantels 8 über den Blechdeckel 9 umgebördelt und über eine rundumlaufende Schweißnaht 10 gasdicht mit diesem verbunden.The shaped block 2 is surrounded on its circumferential surface with a sheet metal jacket 8, while the outer end face 5 of the shaped block is covered with a sheet metal cover 9. The metal cover 9 lies against the outer end face 5 of the shaped block 2 and extends to the outermost edge of the end face 5. In this outer region, the edge of the sheet metal jacket 8 is flanged over the sheet metal cover 9 and connected to it in a gas-tight manner via a circumferential weld seam 10.

In seiner Mitte weist der Blechdeckel 9 eine Gaseintrittsöffnung 11 auf, die einen in Axialrichtung vorspringenden zylindrischen Rand trägt. Das Gaszuführungsrohr 4 ist gasdicht an die Gaseintrittsöffnung 11 angeschlossen, wobei das Ende des Gaszuführungsrohrs 4 formschlüssig in die Gaseintrittsöffnung 11 eingesteckt und über eine umlaufende Schweißnaht 13 außen mit dem Rand 12 gasdicht verbunden ist.In the middle, the sheet metal cover 9 has a gas inlet opening 11, which carries a cylindrical edge projecting in the axial direction. The gas supply pipe 4 is gas-tightly connected to the gas inlet opening 11, the end of the gas supply pipe 4 being positively inserted into the gas inlet opening 11 and connected to the edge 12 in a gas-tight manner via a circumferential weld seam 13.

Unmittelbar an die Gaseintrittsöffnung 11 sohließt sich ein kreisförmiger Eintrittsraum 14 an, der durch eine Stanzung in den Blechdeckel 9 eingeformt ist. Ferner ist in den Blechdeckel eine umlaufende, sickenförmige Ausbauchung 15 eingearbeitet, die zwischen der Stirnfläche 5 des Formsteins 5 und dem Deckelmaterial einen Sammelraum 16 schafft, der unmittelbar vor dem Eintrittsquerschnitt des Ringbereichs 6 mit gerichteter Porosität verläuft.Immediately adjacent to the gas inlet opening 11 is a circular inlet space 14, which is stamped into the sheet metal cover 9. Furthermore, a circumferential, bead-shaped bulge 15 is incorporated into the sheet metal cover, which creates a collecting space 16 between the end face 5 of the shaped block 5 and the cover material, which runs directly in front of the entry cross section of the ring region 6 with directed porosity.

Der Eintrittsraum 14 und der Sammelraum 16 sind über sechs spiralarmige Verbindungskanäle 17 miteinander verbunden. Die Verbindungskanäle 17 sind in gleicher Weise wie der Eintrittsraum 14 und der Sammelraum 16 durch sickenförmige Ausbauchungen 18 gebildet. Die sechs spiralarmigen Verbindungskanäle 17 sind in gleichmäßigen Abständen über den Umfang verteilt angeordnet und weisen denselben Richtungssinn auf.The entry space 14 and the collection space 16 are connected to one another via six spiral-arm connecting channels 17. The connecting channels 17 are formed in the same way as the entry space 14 and the collecting space 16 by bead-shaped bulges 18. The six spiral-arm connecting channels 17 are arranged at uniform intervals over the circumference and have the same sense of direction.

Der Blechdeckel 9 kann mit all seinen sickenförmigen Ausbauchungen in einem einzigen Arbeitsgang hergestellt werden. Durch die Sicken erhält der Blechdeckel 9 eine sehr gute Stabilität und kann dadurch erheblichen Drücken standhalten, ohne sich zu verformen. Auch treten keine Verwerfungen des Deckels beim Anbringen der Schweißnähte 10 und 13 auf.The sheet metal cover 9 can be produced with all of its bead-shaped bulges in a single operation. The beads give the sheet metal cover 9 very good stability and can therefore withstand considerable pressures without deforming. Also, there is no warping of the cover when the weld seams 10 and 13 are attached.

Das durch das Gaszuführungsrohr 4 in den Eintrittsraum 14 gelangende Spülgas verteilt sich gleichmäßig auf die sechs Verbindungskanäle 17 und gelangt von dort in den Sammelraum 16. Da das Spülgas mit einer starken Tangentialkomponente schräg in den Sammelraum 16 einströmt. wird in dem Sammelraum eine umlaufende Gasströmung erzeugt, so daß vor dem gesamten Eintrittsquerschnitt des Ringbereichs 6 mit gerichteter Porosität eine gleichmäßige Druckverteilung erzielt wird. Dadurch ist gewährleistet, daß der Gasspülstein über seinen Umfang gleichmäßig durchströmt wird.The purging gas entering the inlet space 14 through the gas supply pipe 4 is distributed uniformly over the six connecting channels 17 and from there reaches the collecting space 16. Since the purging gas flows obliquely into the collecting space 16 with a strong tangential component. a circulating gas flow is generated in the collecting space, so that a uniform pressure distribution is achieved with directed porosity in front of the entire inlet cross section of the ring region 6. This ensures that the gas purging plug is flowed through evenly over its circumference.

Während der Eintrittsraum 14 und der Gassammelraum 16 etwa zwei bis drei Millimeter hoch sind. sind die Verbindungskanäle 17 nur etwa ein bis zwei Millimeter hoch. Die Breite der Verbindungskanäle 17 beträgt etwa fünf bis sechs Millimeter. Durch diese Dimensionierung wird in den Verbindungskanälen eine relativ hohe Strömungsgeschwindigkeit des Spülgases erzielt, die mit dazu beiträgt, daß in dem Sammelraum 16 eine gute Gasverteilung mit gleichmäßigen Druckverhältnissen erreicht wird.While the entrance space 14 and the gas collection space 16 are about two to three millimeters high. the connecting channels 17 are only about one to two millimeters high. The width of the connecting channels 17 is approximately five to six millimeters. As a result of this dimensioning, a relatively high flow rate of the purge gas is achieved in the connecting channels, which also contributes to the fact that a good gas distribution with uniform pressure conditions is achieved in the collecting space 16.

Bei einer anderen, in der Zeichnung nicht dargestellten Ausführungsform sind der die Gaseintrittsöffnung umgebende Eintrittsraum, der ringförmige Sammelraum sowie die die beiden Räume verbindenden Kanäle durch Ausnehmungen an der äußeren Stirnseite des Formsteins ausgebildet. Bei diesem Ausführungsbeispiel kann der Blechdeckel völlig ebenflächig ausgebildet sein.In another embodiment, not shown in the drawing, the inlet space surrounding the gas inlet opening, the annular collecting space and the channels connecting the two spaces are formed by recesses on the outer end face of the shaped block. In this embodiment, the sheet metal cover can be completely flat.

Claims (5)

1. Gas bubble brick for metallurgical vessels consisting of a gas-permeable shaped brick which can be installed in the wall or the bottom of the vessel and having directed porosity, which is designed in a ring region of the shaped brick, a gas-tight metal casing partially surrounding the shaped brick and welded together from a metal jacket extending around the lateral circumferential area of the shaped brick and a metal cover covering the outer face of the shaped brick, as well as a gas supply pipe, which is welded onto the rim of a central gas inlet orifice of the metal cover, characterised in that an annular collecting chamber (16) is provided in front of the inlet cross-section of the region (6) having directed porosity, and in that the connecting area of the gas supply pipe (4) is joined to the annular collecting chamber (16) via at least one joining channel (17).
2. Gas bubble brick according to claim 1, characterised in that the joining channel (17) is designed in the shape of a spiral.
3. Gas bubble brick according to claim 1-2, characterised in that several joining channels (17), arranged at regular intervals around the circumference, are provided and enter the annular collecting chamber (16) obliquely at the same angle.
4. Gas bubble brick according to claim 1-3, characterised in that the gas inlet orifice (11) of the metal cover (9) is surrounded by a circular inlet chamber (14) and in that the joining channels (17) extend from the inlet chamber (14) to the annular collecting chamber (16).
5. Gas bubble brick according to claim 1-4, characterised in that the annular collecting chamber (16), the inlet chamber (14) and the joining channels (17) are formed by bead-shaped bulges in the metal cover (9).
EP84112403A 1983-11-17 1984-10-15 Gas flushing plug for metallurgical vessels Expired EP0148336B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84112403T ATE29044T1 (en) 1983-11-17 1984-10-15 GAS FLUSH STONE FOR METALLURGICAL VESSELS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3341491 1983-11-17
DE3341491A DE3341491C1 (en) 1983-11-17 1983-11-17 Gas flushing stone for metallurgical vessels

Publications (2)

Publication Number Publication Date
EP0148336A1 EP0148336A1 (en) 1985-07-17
EP0148336B1 true EP0148336B1 (en) 1987-08-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP84112403A Expired EP0148336B1 (en) 1983-11-17 1984-10-15 Gas flushing plug for metallurgical vessels

Country Status (6)

Country Link
US (1) US4560149A (en)
EP (1) EP0148336B1 (en)
JP (1) JPS60116712A (en)
AT (1) ATE29044T1 (en)
CA (1) CA1230479A (en)
DE (2) DE3341491C1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3527793A1 (en) * 1985-08-02 1987-02-12 Esb Schweissbetrieb Burbach & METHOD FOR ASSEMBLING A GAS PURELINE PROVIDED FOR METALLURGICAL VESSELS
CH666491A5 (en) * 1985-09-04 1988-07-29 Burbach & Bender Ohg GAS PURGE FOR METALLURGICAL VESSELS.
AT384623B (en) * 1985-12-23 1987-12-10 Tosin Albert COOLING STONE FOR METALLURGICAL VESSELS
US4705563A (en) * 1986-10-23 1987-11-10 The United States Of America As Represented By The United States Department Of Energy Methods and apparatus for reducing corrosion in refractory linings
AT388936B (en) * 1988-04-13 1989-09-25 Veitscher Magnesitwerke Ag FIRE-RESISTANT, GAS-PERMEABLE COOLING STONE
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US5249778A (en) * 1992-04-14 1993-10-05 Dolomitwerke Gmbh Gas stir plug device with visual wear indicator
JP7199261B2 (en) * 2019-03-13 2023-01-05 Ｊｆｅ建材株式会社 Rockfall protection device and connector

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Also Published As

Publication number Publication date
EP0148336A1 (en) 1985-07-17
ATE29044T1 (en) 1987-09-15
DE3465497D1 (en) 1987-09-24
CA1230479A (en) 1987-12-22
US4560149A (en) 1985-12-24
JPS60116712A (en) 1985-06-24
JPH0140886B2 (en) 1989-09-01
DE3341491C1 (en) 1985-07-11

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