EP0181853A1 - Gas flushing plug for metallurgical furnaces and vessels - Google Patents
Gas flushing plug for metallurgical furnaces and vessels Download PDFInfo
- Publication number
- EP0181853A1 EP0181853A1 EP85890169A EP85890169A EP0181853A1 EP 0181853 A1 EP0181853 A1 EP 0181853A1 EP 85890169 A EP85890169 A EP 85890169A EP 85890169 A EP85890169 A EP 85890169A EP 0181853 A1 EP0181853 A1 EP 0181853A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- gas supply
- supply pipe
- vessels
- interior
- 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
Links
- 238000011010 flushing procedure Methods 0.000 title description 5
- 229910052751 metal Inorganic materials 0.000 claims abstract description 34
- 239000002184 metal Substances 0.000 claims abstract description 34
- 238000010926 purge Methods 0.000 claims abstract description 32
- 239000004575 stone Substances 0.000 claims abstract description 32
- 230000001681 protective effect Effects 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 description 56
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000011470 perforated brick Substances 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
Classifications
-
- 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 furnaces and vessels.
- gas purging stones which are generally referred to as gas purging stones, are increasingly being used for blowing various gases into metallurgical furnaces and vessels through their linings for the treatment of metals or metal melts.
- gas purging plugs are mostly arranged in the floor, especially in converters for fresh iron, in pig iron pans, ladles and tundish when continuously casting steel, but can be found in all these units and also in other metallurgical furnaces and vessels, e.g. Arc furnaces or vessels for the treatment of non-ferrous metals, such as aluminum melting furnaces, can also be installed in the lining of the side walls.
- Gas purging stones are either stones with a normal increased porosity, i.e. stones with an increased number of randomly distributed pores, or stones with a so-called directional porosity, these are stones in which a number of pores are in a desired direction throughout the whole Stone stretches, used. Stones with Directed porosity has the advantage that, if desired, fine-grained solid substances can also be suspended in carrier gases through the directed pores.
- gas purging stones of the type usually used are typically used in various ways to improve the durability of gas purging stones, which are usually arranged in a perforated brick.
- the Spülsteinboden known with sheet metal shrouded gas flushing brick, and in which at its from the furnace interior and G efäßinneren distal end which forms the Spülsteinboden and a gas feed pipe for the Passing gas through the gas purging plug into the molten metal to be treated, a spiral pipe for supplying the purge gas is connected to this gas supply pipe, the gas supply pipe and the spiral pipe being embedded in a refractory sintered material (FR-OS 24 51 945).
- the spiral tube is intended to serve to melt metal that has entered the interior of the gas purging plug as a result of wear or cracks and / or as a result of an at least partial destruction of the sheet metal jacket at the hot end of the gas purging plug into it or between it and the perforated brick is to solidify and thereby prevent further flow out of the metallurgical furnace or vessel.
- a known gas purging plug has the main disadvantage that it is not interchangeable and therefore interruptions in the operation of the furnace or vessel are necessary, since this plug despite the measures mentioned is subject to more rapid wear than the lining in its immediate vicinity.
- a gas purging plug arranged in a refractory perforated brick in which the gas supply pipe is not directly connected to the gas purging plug, but is molded and molded into a refractory body, namely into the perforated brick itself or a refractory, block-like body arranged under the purging plug the gas purging line connected line coil, which may be spiral, is connected (DE-OS 31 10 204).
- a breakthrough of metal cannot be prevented with this construction with certainty.
- gas purging plugs which rest on a safety block at their end remote from the inside of the furnace or the inside of the vessel, which forms the purging stone base, and have a pipe system for the gas supply, which is formed by a double, partly vertical pipe coil and embedded in the safety block is (European patent application 105 868).
- This division of the gas supply pipe divides a possibly penetrating liquid amount of metal, for example amount of steel, and thus its heat content, and further increases the surface area for more rapid solidification of the penetrated melt; in addition, solidification of metal melt which has penetrated is brought about by the fact that the gas supply pipe is also guided against the direction of the ferrostatic pressure.
- the invention now aims to provide a gas purging plug for metallurgical furnaces and vessels, which is connected at its cold stone end remote from the furnace interior or vessel interior to a gas supply pipe and with which it is possible with the aid of simple measures to reduce the risk of a breakthrough Prevent metal melt through the gas supply pipe in an effective manner.
- the invention relates to a refractory gas purging plug for metallurgical furnaces and vessels, which on the inside of the furnace or Ge Cold stone end lying inside the barrel is connected to a gas supply pipe and is characterized in that a fully formed metal core with a helically surrounding metal spiral is arranged centrally in the gas supply pipe and extends in the longitudinal direction thereof.
- the gas feed pipe can be surrounded at least in its part adjoining the cold stone end by a protective pipe which is filled with a refractory mass.
- the gas purging plug designated 1 in the drawing can have any shape, for example the shape of a cuboid or a conical shape as shown, and can be arranged, for example, in a perforated brick (not shown).
- the refractory material from which the stone 1 is constructed is also irrelevant to the present invention and can be selected in accordance with the intended use of the stone.
- the sink 1 shown also has directional pores 3 which extend in its longitudinal direction and pass from the cold stone end to the stone end facing the interior of the furnace or the interior of the vessel, the hot stone end.
- the gas purging stone 1 is encased on its side surfaces by a sheet metal jacket 5 and has a sheet metal base 6 on its cold stone end 4 which lies away from the interior of the furnace or the inside of the vessel.
- a gap-shaped intermediate space 7, which can be referred to as a gas supply gap, may be present between the cold stone end 4 and the sheet metal base 6 in order to ensure a uniform distribution of the gas flow supplied over the stone cross section.
- the cold stone end 4 or the sheet metal base 6, if present, is connected to a gas feed pipe 8, through which the desired flushing gas or flushing medium is supplied to the gas flushing stone 1.
- This coil 10, which suitably consists of steel wire and is wound around the metal core, is attached to the metal core 9 in a suitable manner, e.g. by welding (at 11) or by merely resilient embracing, and lies against the inner wall of the gas supply pipe 8.
- the purging medium flows through the space remaining between the metal core 9 and the inner wall of the gas supply pipe 8 to the gas purging plug 1.
- the metal core 9 in turn is attached to the gas supply pipe 8 (at 12), for example by welding or with the aid of screws or bolts, which come from the outside go through the wall of the gas supply pipe 8 inside.
- the metal core 9 together with the coil 10 represents an effective breakthrough protection, because it is understandable that liquid metal, which may have broken through the gas purging plug 1 into the gas supply pipe 8, in this pipe through the metal core 9 and to the inner wall of this pipe adjacent coil 10 is forced to flow around the metal core several times, causing it to cool and shortly is frozen.
- the gas supply pipe 8 can be concentrically surrounded at least in its part adjoining the cold stone end 4 by a protective pipe 13 which is filled with a refractory mass 14, in particular a casting compound.
- This protective tube 13 with the refractory mass 14 prevents further spread of a possible breakthrough of liquid metal through the wall of the gas supply tube 8.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Furnace Charging Or Discharging (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
Die Erfindung betrifft einen Gasspülstein 1 für metallurgische ?Öfen? und Gefäße, der an seinem von Ofeninneren bzw. Gefäßinneren abliegenden, kalten Steinende 4 mit einem Gaszuführungsrohr 8 verbunden ist, in dessen Längsrichtung zentrisch ein voll ausgebildeter Metallkern 9 angeordnet ist, der von einer Wendel 10 aus Metall schraubenlinienförmig umgeben ist. Vorzugsweise ist das Gaszuführungsrohr 8 zumindest in dem Teil, der an das kalte Steinende 4 anschließt, konzentrisch von einem Schutzrohr 13 umgeben, das mit einer feuerfesten Masse 14 gefullt ist.The invention relates to a gas purging plug 1 for metallurgical? Furnaces? and vessels, which are connected at its cold stone end 4, which is remote from the interior of the furnace or the interior of the vessel, to a gas supply pipe 8, in the longitudinal direction of which a fully formed metal core 9 is arranged centrally, which is surrounded by a helix 10 made of metal in a helical shape. The gas supply pipe 8 is preferably concentrically surrounded, at least in the part which adjoins the cold stone end 4, by a protective pipe 13 which is filled with a refractory mass 14.
Description
Die Erfindung betrifft einen Gasspülstein für metallurgische öfen und Gefäße.The invention relates to a gas purging plug for metallurgical furnaces and vessels.
In neuerer Zeit werden in steigendem Umfang feuerfeste, gasdurchlässige Formkörper, die allgemein als Gasspülsteine bezeichnet werden, zum Einblasen verschiedener Gase in metallurgische öfen und Gefäße durch deren Auskleidung hindurch zur Behandlung von Metallen bzw. Metallschmelzen verwendet. Diese Gasspülsteine werden insbesondere in Konvertern zum Frischen von Roheisen, in Roheisenpfannen, Gießpfannen und Zwischengefäßen (Tundish) beim Stranggießen von Stahl meist im Boden angeordnet, können jedoch in allen diesen Aggregaten und ebenso in anderen metallurgischen öfen und Gefäßen, z.B. Lichtbogenöfen oder Gefäßen zur Behandlung von Nichteisenmetallen, wie Aluminiumschmelzöfen, auch in die Auskleidung der Seitenwände eingebaut werden.Recently, refractory, gas-permeable moldings, which are generally referred to as gas purging stones, are increasingly being used for blowing various gases into metallurgical furnaces and vessels through their linings for the treatment of metals or metal melts. These gas purging plugs are mostly arranged in the floor, especially in converters for fresh iron, in pig iron pans, ladles and tundish when continuously casting steel, but can be found in all these units and also in other metallurgical furnaces and vessels, e.g. Arc furnaces or vessels for the treatment of non-ferrous metals, such as aluminum melting furnaces, can also be installed in the lining of the side walls.
Als Gasspülsteine werden entweder Steine mit normaler erhöhter Porosität, das heißt Steine mit einer erhöhten Anzahl von willkürlich verteilten Poren, oder aber Steine mit einer sogenannten gerichteten Porosität, das sind Steine, in welchen sich eine Anzahl von Poren in einer gewünschten Richtung durchgehend durch den ganzen Stein erstreckt, verwendet. Steine mit gerichteter Porosität haben den Vorteil, daß durch die gerichteten Poren gewünschtenfalls auch feinkörnige feste Stoffe in Trägergasen suspendiert werden können.Gas purging stones are either stones with a normal increased porosity, i.e. stones with an increased number of randomly distributed pores, or stones with a so-called directional porosity, these are stones in which a number of pores are in a desired direction throughout the whole Stone stretches, used. Stones with Directed porosity has the advantage that, if desired, fine-grained solid substances can also be suspended in carrier gases through the directed pores.
Ein häufiger Nachteil von Gasspülsteinen der üblicherweise verwendeten Art besteht darin, daß ihre Haltbarkeit geringer ist als die der feuerfesten Auskleidung in ihrer Umgebung in dem betreffenden Ofen bzw. Gefäß und sich dann durch den vorzeitigen Verschleiß der Gasspülsteine Stillstandszeiten für diesen Ofen bzw. dieses Gefäß ergeben. Es ist daher bereits auf verschiedene Weise versucht worden, die Haltbarkeit von Gasspülsteinen, die gewöhnlich in einem Lochstein angeordnet sind, zu verbessern. So ist beispielsweise ein an seinen Seitenwänden und auf seiner Bodenfläche, dem Spülsteinboden, mit Blech ummantelter Gasspülstein bekannt, durch dessen Inneres sich Metallplatten erstrecken und bei dem an seinem vom Ofeninneren bzw. Gefäßinneren abliegenden Ende, das den Spülsteinboden bildet und ein Gaszuführungsrohr für das Durchleiten von Gas durch den Gasspülstein in die zu behandelnde Metallschmelze aufweist, an dieses Gaszuführungsrohr ein spiralförmiges Rohr zur Zuführung des Spülgases angeschlossen ist, wobei das Gaszuführungsrohr und das spiralförmige Rohr in einem feuerfesten Sintermaterial eingebettet sind (FR-OS 24 51 945). Das spiralförmige Rohr soll bei dieser Konstruktion dazu dienen, Metallschmelze, die infolge des Verschleißes oder von Rissen des Gasspülsteines in dessen Inneres eingedrungen ist und/oder infolge einer zumindest teilweisen Zerstörung des Blechmantels am heißen Ende des Gasspülsteines in diesen oder zwischen diesen und den Lochstein gelangt ist, zum Erstarren zu bringen und dadurch an einem weiteren Ausfließen aus dem metallurgischen Ofen oder Gefäß zu hindern. Ein solcher bekannter Gasspülstein hat aber vor allem den Nachteil, daß er nicht auswechselbar ist und dadurch Unterbrechungen des Betriebes des Ofens oder Gefäßes erforderlich werden, da dieser Stein trotz der angeführten Maßnahmen einem rascheren Verschleiß unterliegt als die Auskleidung in seiner nächsten Umgebung. Ferner ist ein in einem feuerfesten Lochstein angeordneter Gasspülstein bekannt, bei dem das Gaszuführungsrohr nicht direkt an den Gasspülstein angeschlossen ist, sondern mit einer in einen feuerfesten Körper, nämlich in den Lochstein selbst oder einen unter dem Spülstein angeordneten feuerfesten, blockartigen Körper, eingeformten und an den Gasspülstein angeschlossenen Leitungsschlange, die spiralförmig ausgebildet sein kann, verbunden ist (DE-OS 31 10 204). Ein Durchbruch von Metall kann jedoch mit dieser Konstruktion nicht mit Sicherheit verhindert werden. Eine erhebliche Verbesserung wird mit Gasspülsteinen erreicht, die an ihrem vom Ofeninneren bzw. Gefäßinneren abliegenden Ende, das den Spülsteinboden bildet, auf einem Sicherungsblock aufruhen und für die Gaszuführung ein Rohrsystem aufweisen, das von einer doppelten, teilweise vertikal verlaufenden Rohrschlange gebildet und im Sicherungsblock eingebettet ist (europäische Patentanmeldung 105 868). Durch diese Teilung des Gaszuführungsrohres wird eine in das Rohr gegebenenfalls eindringende flüssige Metallmenge, z.B. Stahlmenge, und damit deren Wärmeinhalt geteilt und ferner die Oberfläche zur rascheren Erstarrung der eingedrungenen Schmelze vergrößert; zusätzlich wird eine Erstarrung von eingedrungener Metallschmelze noch dadurch bewirkt, daß das Gaszuführungsrohr auch gegen die Richtung des ferrostatischen Druckes geführt ist.A common disadvantage of gas purging stones of the type usually used is that their durability is less than that of the refractory lining in their vicinity in the relevant furnace or vessel and then there are downtimes for this furnace or this vessel due to the premature wear of the gas purging stones . Attempts have therefore been made in various ways to improve the durability of gas purging stones, which are usually arranged in a perforated brick. For example, a, through the interior of metal plates extending on its side walls and on the bottom surface thereof, the Spülsteinboden known with sheet metal shrouded gas flushing brick, and in which at its from the furnace interior and G efäßinneren distal end which forms the Spülsteinboden and a gas feed pipe for the Passing gas through the gas purging plug into the molten metal to be treated, a spiral pipe for supplying the purge gas is connected to this gas supply pipe, the gas supply pipe and the spiral pipe being embedded in a refractory sintered material (FR-OS 24 51 945). In this construction, the spiral tube is intended to serve to melt metal that has entered the interior of the gas purging plug as a result of wear or cracks and / or as a result of an at least partial destruction of the sheet metal jacket at the hot end of the gas purging plug into it or between it and the perforated brick is to solidify and thereby prevent further flow out of the metallurgical furnace or vessel. Such a known gas purging plug has the main disadvantage that it is not interchangeable and therefore interruptions in the operation of the furnace or vessel are necessary, since this plug despite the measures mentioned is subject to more rapid wear than the lining in its immediate vicinity. Furthermore, a gas purging plug arranged in a refractory perforated brick is known, in which the gas supply pipe is not directly connected to the gas purging plug, but is molded and molded into a refractory body, namely into the perforated brick itself or a refractory, block-like body arranged under the purging plug the gas purging line connected line coil, which may be spiral, is connected (DE-OS 31 10 204). A breakthrough of metal cannot be prevented with this construction with certainty. A significant improvement is achieved with gas purging plugs, which rest on a safety block at their end remote from the inside of the furnace or the inside of the vessel, which forms the purging stone base, and have a pipe system for the gas supply, which is formed by a double, partly vertical pipe coil and embedded in the safety block is (European patent application 105 868). This division of the gas supply pipe divides a possibly penetrating liquid amount of metal, for example amount of steel, and thus its heat content, and further increases the surface area for more rapid solidification of the penetrated melt; in addition, solidification of metal melt which has penetrated is brought about by the fact that the gas supply pipe is also guided against the direction of the ferrostatic pressure.
Die Erfindung zielt nun darauf ab, einen Gasspülstein für metallurgische öfen und Gefäße zu schaffen, der an seinem vom Ofeninneren bzw. Gefäßinneren abliegenden, kalten Steinende mit einem Gaszuführungsrohr verbunden ist und bei dem es mit Hilfe einfacher Maßnahmen möglich ist, die Gefahr eines Durchbruches von Metallschmelze durch das Gaszuführungsrohr auf wirksame Weise zu verhindern. Demnach betrifft die Erfindung einen feuerfesten Gasspülstein für metallurgische öfen und Gefäße, der an seinem vom Ofeninneren bzw. Gefäßinneren abliegenden kalten Steinende mit einem Gaszuführungsrohr verbunden und dadurch gekennzeichnet ist, daß im Gaszuführungsrohr zentrisch sich in dessen Längsrichtung erstreckend ein voll ausgebildeter Metallkern mit einer ihn schraubenlinienförmig umgebenden Wendel aus Metall angeordnet ist. Zur weiteren Erhöhung der Sicherheit kann das Gaszuführungsrohr zumindest in seinem an das kalte Steinende anschließenden Teil konzentrisch von einem Schutzrohr umgeben sein, das mit einer feuerfesten Masse gefüllt ist.The invention now aims to provide a gas purging plug for metallurgical furnaces and vessels, which is connected at its cold stone end remote from the furnace interior or vessel interior to a gas supply pipe and with which it is possible with the aid of simple measures to reduce the risk of a breakthrough Prevent metal melt through the gas supply pipe in an effective manner. Accordingly, the invention relates to a refractory gas purging plug for metallurgical furnaces and vessels, which on the inside of the furnace or Ge Cold stone end lying inside the barrel is connected to a gas supply pipe and is characterized in that a fully formed metal core with a helically surrounding metal spiral is arranged centrally in the gas supply pipe and extends in the longitudinal direction thereof. To further increase safety, the gas feed pipe can be surrounded at least in its part adjoining the cold stone end by a protective pipe which is filled with a refractory mass.
Die Erfindung wird an Hand der Zeichnung näher erläutert, in der schematisch im Teilschnitt ein mit einer Blechummantelung versehener Gasspülstein mit einem Gaszuführungsrohr und einem dieses umgebenden Schutzrohr dargestellt ist.The invention will be explained in more detail with reference to the drawing, in which a gas purging plug provided with a sheet metal jacket and having a gas supply pipe and a protective pipe surrounding it is shown schematically in partial section.
Der in der Zeichnung mit 1 bezeichnete Gasspülstein kann eine beliebige Form, z.B. wie gezeigt die Form eines Quaders oder eine konische Form, aufweisen und beispielsweise in einem (nicht dargestellten) Lochstein angeordnet sein. Auch das feuerfeste Material, aus dem der Stein 1 aufgebaut ist, ist für die vorliegende Erfindung ohne Belang und kann entsprechend dem vorgesehenen Verwendungszweck des Steines gewählt werden. Der dargestellte Spülstein 1 hat neben normalen, also willkürlich verteilten, ungerichteten Poren 2 noch gerichtete Poren 3, die sich in seiner Längsrichtung erstrecken und vom kalten Steinende bis zu dem dem Ofeninneren bzw. Gefäßinneren zugewandten Steinende, dem heißen Steinende, durchgehen. Der Gasspülstein 1 ist an seinen Seitenflächen von einem Blechmantel 5 umhüllt und weist an seinem vom Ofeninneren bzw. Gefäßinneren abliegenden, kalten Steinende 4 einen Blechboden 6 auf. Der Blechmantel 5, der sich über die gesamte Seitenlänge des Gasspülsteines 1 erstrecken oder aber nur die Seitenflächen des in der Zeichnung wiedergegebenen kalten Steinendteils bedecken kann, und der Blechboden 6 bewirken, daß das gesamte zugeführte Spülgas in den Gasspülstein 1 eindringt und ein Abströmen dieses Gases nach außen verhindert wird. Zwischen dem kalten Steinende 4 und dem Blechboden 6 kann ein spaltförmiger Zwischenraum 7, der als Gaszuführungsspalt bezeichnet werden kann, vorhanden sein, um eine gleichmäßige Verteilung des zugeführten Gasstromes über den Steinquerschnitt zu gewährleisten.The gas purging plug designated 1 in the drawing can have any shape, for example the shape of a cuboid or a conical shape as shown, and can be arranged, for example, in a perforated brick (not shown). The refractory material from which the
Das kalte Steinende 4 bzw. der gegebenenfalls vorhandene Blechboden 6 ist mit einem Gaszuführungsrohr 8 verbunden, durch welches das gewünschte Spülgas oder Spülmedium dem Gasspülstein 1 zugeführt wird. Im Inneren dieses Gaszuführungsrohres 8 und zentrisch sich in dessen Längsrichtung erstreckend ist ein voll ausgebildeter Metallkern 9, in der Regel ein Stahlkern, vorzugsweise ein Rundstahl, mit einer ihn schraubenlinienförmig umgebenden Wendel 10 aus Metall, gewöhnlich ebenfalls aus Stahl, angeordnet. Diese Wendel 10, die zweckmäßig aus Stahldraht besteht und um den Metallkern gewickelt ist, ist an dem Metallkern 9 auf geeignete Weise befestigt, z.B. durch Schweißung (bei 11) oder durch bloßes federndes Umfassen, und liegt an der Innenwand des Gaszuführungsrohres 8 an. Das Spülmedium strömt durch den zwischen dem Metallkern 9 und der Innenwand des Gaszuführungsrohres 8 verbleibenden Zwischenraum zum Gasspülstein 1. Der Metallkern 9 seinerseits ist am Gaszuführungsrohr 8 befestigt (bei 12), beispielsweise durch Anschweißen oder mit Hilfe von Schrauben oder Bolzen, die von außen her durch die Wand des Gaszuführungsrohres 8 in dessen Inneres gehen.The cold stone end 4 or the
Der Metallkern 9 stellt zusammen mit der Wendel 10 eine wirksame Durchbruchssicherung dar, denn es ist verständlich, daß flüssiges Metall, das gegebenenfalls durch den Gasspülstein 1 in das Gaszuführungsrohr 8 durchgebrochen ist, in diesem Rohr durch den Metallkern 9 und die an die Innenwand dieses Rohres anliegende Wendel 10 gezwungen wird, mehrmals um den Metallkern herumzufließen, wodurch es abgekühlt und in Kürze zum Erstarren gebracht wird.The
Gewünschtenfalls kann das Gaszuführungsrohr 8 zumindest in seinem an das kalte Steinende 4 anschließenden Teil konzentrisch von einem Schutzrohr 13 umgeben sein, das mit einer feuerfesten Masse 14, insbesondere einer Gießmasse, gefüllt ist. Dieses Schutzrohr 13 mit der feuerfesten Masse 14 verhindert eine weitere Ausbreitung eines eventuellen Durchbruches von flüssigem Metall durch die Wandung des Gaszuführungsrohres 8.If desired, the
Claims (2)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0296284A AT383617B (en) | 1984-09-18 | 1984-09-18 | GAS PURGE FOR METALLURGICAL OVENS AND VESSELS |
| AT2962/84 | 1984-09-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0181853A1 true EP0181853A1 (en) | 1986-05-21 |
| EP0181853B1 EP0181853B1 (en) | 1988-01-27 |
Family
ID=3543142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP85890169A Expired EP0181853B1 (en) | 1984-09-18 | 1985-07-30 | Gas flushing plug for metallurgical furnaces and vessels |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4657226A (en) |
| EP (1) | EP0181853B1 (en) |
| JP (1) | JPS6173811A (en) |
| AT (1) | AT383617B (en) |
| CA (1) | CA1257091A (en) |
| DE (1) | DE3561516D1 (en) |
| ES (1) | ES296151Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0362475A2 (en) * | 1988-10-01 | 1990-04-11 | Didier-Werke Ag | Gas-flushing brick |
| US4978108A (en) * | 1988-10-01 | 1990-12-18 | Didier-Werke Ag | Gas washing sink without integral closure member |
| US4995596A (en) * | 1988-10-01 | 1991-02-26 | Didier-Werke Ag | Apparatus for repairing a perforated brick in a metallurgical vessel |
| US5007621A (en) * | 1988-10-01 | 1991-04-16 | Didier-Werke Ag | Apparatus for mounting a gas washing sink in a centered manner in perforated brick |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3810098C1 (en) * | 1988-03-25 | 1989-03-23 | Radex-Heraklith Industriebeteiligungs Ag, Wien, At | |
| US4938461A (en) * | 1989-06-02 | 1990-07-03 | Zedmark Refractories Corp. | Device for distributing gas into molten metal |
| US5104097A (en) * | 1990-09-14 | 1992-04-14 | Martin & Pagenstecher Gmbha | Gas stir plugs with slots and method of making the same |
| US5249778A (en) * | 1992-04-14 | 1993-10-05 | Dolomitwerke Gmbh | Gas stir plug device with visual wear indicator |
| US5544867A (en) * | 1995-03-13 | 1996-08-13 | Neyer; Richard H. | Apparatus and process for transporting molten metal |
| JP2011194457A (en) * | 2010-03-23 | 2011-10-06 | Kurosaki Harima Corp | Installation structure of plug for gas blowing |
| CN103470869B (en) * | 2013-09-04 | 2015-06-17 | 贵州师范大学 | Steel-shell combined-flow steel pipe and production method thereof |
| CN107385153B (en) * | 2017-09-05 | 2022-09-20 | 武汉科技大学 | Method for manufacturing air brick capable of stirring motion state of metal melt in metallurgical furnace into spiral flow |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3395910A (en) * | 1965-12-01 | 1968-08-06 | Union Carbide Corp | Metallurgical tuyere |
| GB1210314A (en) * | 1967-02-01 | 1970-10-28 | Yawata Iron & Steel Co | Device for plugging a gas inlet in a molten metal refining container |
| DE2243200A1 (en) * | 1972-09-01 | 1974-03-07 | Voest Ag | Porous gas feed brick for ladles - protected by automatic slider against metal break-out |
| DE1458806C3 (en) * | 1964-06-18 | 1975-01-30 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude, Paris | Antechamber for introducing gases through a porous body into a metallurgical vessel |
| FR2451945A1 (en) * | 1979-03-19 | 1980-10-17 | Est Aciers Fins | Tuyere for injecting stirring gas into molten metal - where gas flows through narrow annular gap between refractory plug and conical ring, so rapid wear of tuyere is avoided |
| DE3110204A1 (en) * | 1981-03-17 | 1982-10-14 | Didier-Werke Ag, 6200 Wiesbaden | DEVICE FOR INTRODUCING GASES IN METALLURGICAL VESSELS |
| DE8129091U1 (en) * | 1981-10-05 | 1983-01-27 | Sindelar, Günter, Dr.-Ing., 5102 Würselen | "METALLURGICAL TANK" |
| EP0105868A1 (en) * | 1982-10-06 | 1984-04-18 | Österreichisch-Amerikanische Magnesit Aktiengesellschaft | Metallurgical furnace or metallurgical vessel |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR90233E (en) * | 1966-06-27 | 1967-11-03 | Air Liquide | Improvement in injectors, nozzles and burners for metallurgical furnaces |
| US3610602A (en) * | 1969-10-14 | 1971-10-05 | United States Steel Corp | Gas-permeable refractory plug and method |
| FR2455008A1 (en) * | 1979-04-25 | 1980-11-21 | Siderurgie Fse Inst Rech | REFRACTORY PIECE WITH SELECTIVE AND ORIENTED PERMEABILITY FOR THE INSUFFLATION OF A FLUID |
| SU1036754A1 (en) * | 1980-11-17 | 1983-08-23 | Производственное Объединение "Ждановтяжмаш" | Tuyere for bottom blowing |
| US4396179A (en) * | 1982-05-28 | 1983-08-02 | Labate M D | Device for introducing gas into molten metal |
-
1984
- 1984-09-18 AT AT0296284A patent/AT383617B/en not_active IP Right Cessation
-
1985
- 1985-07-30 DE DE8585890169T patent/DE3561516D1/en not_active Expired
- 1985-07-30 EP EP85890169A patent/EP0181853B1/en not_active Expired
- 1985-09-09 JP JP60197869A patent/JPS6173811A/en active Pending
- 1985-09-16 US US06/776,441 patent/US4657226A/en not_active Expired - Fee Related
- 1985-09-17 ES ES1985296151U patent/ES296151Y/en not_active Expired
- 1985-09-17 CA CA000490872A patent/CA1257091A/en not_active Expired
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1458806C3 (en) * | 1964-06-18 | 1975-01-30 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude, Paris | Antechamber for introducing gases through a porous body into a metallurgical vessel |
| US3395910A (en) * | 1965-12-01 | 1968-08-06 | Union Carbide Corp | Metallurgical tuyere |
| GB1210314A (en) * | 1967-02-01 | 1970-10-28 | Yawata Iron & Steel Co | Device for plugging a gas inlet in a molten metal refining container |
| DE2243200A1 (en) * | 1972-09-01 | 1974-03-07 | Voest Ag | Porous gas feed brick for ladles - protected by automatic slider against metal break-out |
| FR2451945A1 (en) * | 1979-03-19 | 1980-10-17 | Est Aciers Fins | Tuyere for injecting stirring gas into molten metal - where gas flows through narrow annular gap between refractory plug and conical ring, so rapid wear of tuyere is avoided |
| DE3110204A1 (en) * | 1981-03-17 | 1982-10-14 | Didier-Werke Ag, 6200 Wiesbaden | DEVICE FOR INTRODUCING GASES IN METALLURGICAL VESSELS |
| DE8129091U1 (en) * | 1981-10-05 | 1983-01-27 | Sindelar, Günter, Dr.-Ing., 5102 Würselen | "METALLURGICAL TANK" |
| EP0105868A1 (en) * | 1982-10-06 | 1984-04-18 | Österreichisch-Amerikanische Magnesit Aktiengesellschaft | Metallurgical furnace or metallurgical vessel |
Non-Patent Citations (2)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN, Band 5, Nr. 168 (C-77)[840], 27. Oktober 1981; & JP - A - 56 96035 (KAWASAKI SEITETSU) 03.08.1981 * |
| PATENT ABSTRACTS OF JAPAN, Band 6, Nr. 19 (C-90)[897], 3. Februar 1982; & JP - A - 56 142 813 (ATSUJI TETSUKOU) 07.11.1981 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0362475A2 (en) * | 1988-10-01 | 1990-04-11 | Didier-Werke Ag | Gas-flushing brick |
| EP0362475A3 (en) * | 1988-10-01 | 1990-10-10 | Didier-Werke Ag | Gas-flushing brick |
| US4971295A (en) * | 1988-10-01 | 1990-11-20 | Didier-Werke Ag | Safety-type gas washing sink having improved heat dissipation properties |
| US4978108A (en) * | 1988-10-01 | 1990-12-18 | Didier-Werke Ag | Gas washing sink without integral closure member |
| US4995596A (en) * | 1988-10-01 | 1991-02-26 | Didier-Werke Ag | Apparatus for repairing a perforated brick in a metallurgical vessel |
| US5007621A (en) * | 1988-10-01 | 1991-04-16 | Didier-Werke Ag | Apparatus for mounting a gas washing sink in a centered manner in perforated brick |
| US5056762A (en) * | 1988-10-01 | 1991-10-15 | Didier-Werke Ag | Apparatus for mounting a gas washing sink in a centered manner in a perforated brick |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0181853B1 (en) | 1988-01-27 |
| AT383617B (en) | 1987-07-27 |
| CA1257091A (en) | 1989-07-11 |
| JPS6173811A (en) | 1986-04-16 |
| ES296151Y (en) | 1988-04-16 |
| US4657226A (en) | 1987-04-14 |
| ES296151U (en) | 1987-10-16 |
| ATA296284A (en) | 1986-12-15 |
| DE3561516D1 (en) | 1988-03-03 |
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