EP0043787A1 - Gas-permeable body of fire-resistant material - Google Patents

Gas-permeable body of fire-resistant material Download PDF

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Publication number
EP0043787A1
EP0043787A1 EP81630045A EP81630045A EP0043787A1 EP 0043787 A1 EP0043787 A1 EP 0043787A1 EP 81630045 A EP81630045 A EP 81630045A EP 81630045 A EP81630045 A EP 81630045A EP 0043787 A1 EP0043787 A1 EP 0043787A1
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EP
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Prior art keywords
gas
metal
metal housing
refractory
stone
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Granted
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EP81630045A
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German (de)
French (fr)
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EP0043787B1 (en
Inventor
Bruno Hirschberg
François Schleimer
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Arcelor Luxembourg SA
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Arbed SA
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    • 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
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/34—Blowing through the bath
    • 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 refractory, gas-permeable structures for blowing a gas into a metal treatment vessel through its lining.
  • the oxygen-blowing process used for pig iron freshening which are known under the names "LD”, “LDAC”, “OLP”, “BOF” processes, have recently been improved in metallurgical terms to the effect that secondary gases such as Nitrogen or argon, can be injected in a controlled manner.
  • secondary gases such as Nitrogen or argon
  • the blowing of gas into the metal bath through the vessel bottom or the lining of the vessel walls can also be considered.
  • patent application LU 81.208 the applicant has shown a device for blowing a treatment gas into a metal bath which is intended for insertion into the bottom of a metal treatment vessel and which has a noticeably improved durability compared to the gas-permeable stones known hitherto and allows the desired amounts of gas to be blown in.
  • This apparatus consists essentially in a .85festen gas permeable stone, wherein in the refractory material in the axial direction a plurality of planar, ge - undulated, tubular or wire-shaped metallic members is embedded separation of small wall thickness.
  • this sink consists of sheet steel and segments or strips of refractory material in an alternating arrangement. The passage of gas takes place through the gaps formed within the stone along the metallic separators.
  • the applicant has shown designs and variants of such gas-permeable stones.
  • the sink or the segments forming it are surrounded by a metal housing that is sealed, optionally with an intermediate circuitry of a layer of mortar that bears against the longitudinal surfaces of the stone. The result of this is that the gas only emerges on the fire side of the stone, and furthermore the undesired, because uncontrollable, gas passage along the metal housing is to be prevented.
  • sink stones or the segments forming them are usually produced by pressing refractory material; which may be followed by a stone fire.
  • the sink blocks and therefore also the metal housings surrounding them have a rectangular or square cross section.
  • the metal housing may expand at higher gas pressures, as a result of which the metal housing is lifted off the flushing stone and an undesirable joint is created between the stone and the metal housing.
  • the metal melt pig iron or steel
  • the metal melt can penetrate into this joint and there is a risk that the melt will break through to the cold side of the stone.
  • a refractory, gas-permeable structure in that it consists of a gas-permeable refractory stone which is tightly enclosed by a first metal housing, optionally with the interposition of a mortar layer, in that the first metal housing is arranged at a distance from it is surrounded by the second metal housing, that a refractory, essentially gas-impermeable filling compound is arranged between the two metal housings and that at least one connection and a distribution space for the gas supply are arranged on an end face of the stone.
  • the second, outer metal housing expediently has a cylindrical or frustoconical shape with a circular cross section, which eliminates the risk that it in turn could be deformed. Furthermore, it is now also possible to use it in such applications where flushing blocks with a circular cross section are required, e.g. in pans. Since the first, inner metal housing is now protected from deformations by the gas pressure, it does not bother if it has a rectangular or square cross section, as is desired in the interest of the rational production of the sink.
  • the first, inner metal housing in particular the one adjacent to the gas supply, e.g. cold-side areas, sheet metal plates arranged, e.g. be welded on, which protrude into the refractory filling compound for anchoring.
  • sheet metal plates can also be attached to the second, outer metal housing, which protrude outwards and, when the structure is installed, claw between the gas-permeable structure and the floor stones, for example in a furnace floor in the ramming mass surrounding the structure.
  • the gas-permeable refractory sink located within the first metal housing can be constructed from individual segments lying on one another on longitudinal surfaces, optionally with the interposition of metal supports or inserts.
  • the sink or the segments can be provided with embedded, preferably also pressed-in pairs of sheets, the passage of gas taking place through the gap between the sheets of a pair.
  • the adjacent longitudinal surfaces of the segments can be provided with profiles, such as grooves or shafts, in order to ensure gas permeability to increase the stones.
  • the sink or the segments forming it consist of burned or unfired, e.g. with a carbon carrier, such as tar, pitch, synthetic resin, bound or chemically bound refractory material, such as sintered magnesia, mixtures of magnesia and chrome ore, pre-reacted magnesia-chrome ore sintered grain, high alumina material.
  • a carbon carrier such as tar, pitch, synthetic resin, bound or chemically bound refractory material, such as sintered magnesia, mixtures of magnesia and chrome ore, pre-reacted magnesia-chrome ore sintered grain, high alumina material.
  • refractories are also suitable for the filling compound, which is provided with a chemical or a carbon-containing binder, is introduced as a tamping or casting compound between the two metal housings.
  • Sheet metal e.g. in a thickness between 1 and 3 mm.
  • the structure 1 consists of the actual sink 2, which is enclosed by a first, inner metal housing 3 with a rectangular cross section.
  • a second outer metal housing 4 with a circular cross section is arranged at a distance from it and the space between the two metal housings 3 and 4 is filled with a refractory filling compound 5 .
  • the sink 2 located within the first metal housing 3 consists in the illustrated embodiment of twelve prefabricated segments 7 made of refractory material, which are arranged in two rows of six pieces. Sheet metal plates 8 are inserted into the joints between the segments 7, along which the gas passage takes place.
  • the segments 7 are by means of two strips 9, which are arranged on the inside of the first metal housing 3 and on this are preferably attached by spot welding, spaced from the end face of the first metal housing 3. 'At this end face, which forms the cold side of the structure 1 together with the relevant, lying in a plane surface of the filling material 5, -is tightly welded a plate tenth
  • This plate 10 shown partially broken away in the drawing, is provided with a pipe connection 11, via which the gas can be introduced into the distribution space which remains free between the plate 10 and the end face of the sink 2.
  • a mass of sintered magnesia with the following composition and the following grain structure can serve as the filling mass 5:
  • This mass which is provided, for example, with a chromate binder, can be introduced into the space between the two metal housings 3 and 4 with an addition of 4.5% by weight of water, based on the dry mass, and pounded there.
  • the mass in the space between the two metal housings 3 and 4 can be compressed by means of an internal vibrator introduced into the mass. If the amount of water added is even higher, use as a casting compound would also be possible.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Building Environments (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Insulated Conductors (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

A refractory gas permeable structural unit for blowing a gas into a metal treatment container and through its casing, has a refractory gas permeable stone, a first metal housing sealingly surrounding the stone, a second metal housing arranged at a distance from the first metal housing, a refractory substantially gas impermeable filler material provided between the first and second metal housings, and at least one connection and a distribution chamber provided at the end face of the stone.

Description

Die Erfindung betrifft feuerfeste, gasdurchlässige Baukörper zum Einblasen eines Gases in ein Metallbehandlungsgefäss durch dessen Auskleidung hindurch.The invention relates to refractory, gas-permeable structures for blowing a gas into a metal treatment vessel through its lining.

Die zum Roheisenfrischen dienenden Sauerstoffaufblas-Verfahren, welche unter den Namen "LD"-, "LDAC"-, "OLP"-, "BOF"-Verfahren bekannt sind, wurden neuerdings in metallurgischer Hinsicht dahingehend verbessert, dass durch den Konverterboden Sekundärgase, wie Stickstoff oder Argon, gesteuert eingeblasen werden. Auch bei anderen Metallbehandlungsgefässen, wie etwa Pfannen zur Nachbehandlung von Stahl oder Lichtbogenöfen, kommt das Einblasen von Gas in das Metallbad durch den Gefässboden oder die Auskleidung der Gefässwände hindurch in Betracht.The oxygen-blowing process used for pig iron freshening, which are known under the names "LD", "LDAC", "OLP", "BOF" processes, have recently been improved in metallurgical terms to the effect that secondary gases such as Nitrogen or argon, can be injected in a controlled manner. In other metal treatment vessels, such as pans for post-treatment of steel or electric arc furnaces, the blowing of gas into the metal bath through the vessel bottom or the lining of the vessel walls can also be considered.

In der Patentanmeldung LU 81.208 hat die Anmelderin eine zum Einsetzen in den Boden eines'Metallbehandlungsgefässes bestimmte Vorrichtung zum Einblasen eines Behandlungsgases in ein Metallbad aufgezeigt, welche eine merklich verbesserte Haltbarkeit gegenüber den bisher bekannten gasdurchlässigen Steinen besitzt und das Einblasen der gewünschten Gasmengen gestattet. Diese Vorrichtung besteht im wesentlichen in einem .feuerfesten, gasdurchlässigen Stein, wobei in das feuerfeste Material in axialer Richtung eine Mehrzahl von ebenen, ge- wellten, rohrförmigen oder drahtförmigen metallischen Trenngliedern von geringer Wandstärke eingebettet ist. Nach einer Ausführungsform besteht dieser Spülstein aus Stahlblechen und Segmenten oder Streifen aus feuerfestem Material in abwechselnder Anordnung. Der Gasdurchgang erfolgt durch die innerhalb des Steins ausgebildeten Spalte längs der metallischen Trennglieder.In patent application LU 81.208, the applicant has shown a device for blowing a treatment gas into a metal bath which is intended for insertion into the bottom of a metal treatment vessel and which has a noticeably improved durability compared to the gas-permeable stones known hitherto and allows the desired amounts of gas to be blown in. This apparatus consists essentially in a .feuerfesten gas permeable stone, wherein in the refractory material in the axial direction a plurality of planar, ge - undulated, tubular or wire-shaped metallic members is embedded separation of small wall thickness. According to one embodiment, this sink consists of sheet steel and segments or strips of refractory material in an alternating arrangement. The passage of gas takes place through the gaps formed within the stone along the metallic separators.

In weiteren LU-Patentanmeldungen hat die Anmelderin Ausgestaltungen und Varianten solcher gasdurchlässiger Steine aufgezeigt. Bei allen diesen Ausführungsformen sind der Spülstein bzw. die ihn bildenden Segmente von einem Metallgehäuse umfasst, das dicht, gegebenenfalls unter Zwischenschaltung einer Mörtelschicht, an den Längsflächen des Steines anliegt. Dadurch wird erreicht, dass das Gas nur an der Feuerseite des Steins austritt, und ferner soll der unerwünschte, weil unkontrollierbare Gasdurchgang längs des Metallgehäuses verhindert werden.In further LU patent applications, the applicant has shown designs and variants of such gas-permeable stones. In all of these embodiments, the sink or the segments forming it are surrounded by a metal housing that is sealed, optionally with an intermediate circuitry of a layer of mortar that bears against the longitudinal surfaces of the stone. The result of this is that the gas only emerges on the fire side of the stone, and furthermore the undesired, because uncontrollable, gas passage along the metal housing is to be prevented.

Diese Spülsteine oder die sie bildenden Segmente werden in der Regel durch Pressen von feuerfesten Material hergestellt; worauf sich gegebenenfalls ein Steinbrand anschliessen kann. Durch diese Erzeugungstechnik bedingt, haben die Spülsteine und demnach auch die sie umfassenden Metallgehäuse rechteckigen oder quadratischen Querschnitt.These sink stones or the segments forming them are usually produced by pressing refractory material; which may be followed by a stone fire. As a result of this production technology, the sink blocks and therefore also the metal housings surrounding them have a rectangular or square cross section.

Zufolge dieser Querschnittsform kann es bei höheren Gasdrücken zu einem Aufblähen des Metallgehäuses kommen, wodurch das Metallgehäuse vom'Spülstein abgehoben wird und eine unerwünschte Fuge zwischen dem Stein und dem Metallgehäuse entsteht. In diese Fuge kann die Metallschmelze (Roheisen oder Stahl) eindringen und es besteht die Gefahr, dass die Schmelze bis zur Kaltseite des Steins durchbricht.As a result of this cross-sectional shape, the metal housing may expand at higher gas pressures, as a result of which the metal housing is lifted off the flushing stone and an undesirable joint is created between the stone and the metal housing. The metal melt (pig iron or steel) can penetrate into this joint and there is a risk that the melt will break through to the cold side of the stone.

Ferner besteht die Gefahr, dass das aus Stahlblech bestehende Metallgehäuse durch Aufnahme von Kohlenstoff oder Stickstoff aus dem umgebenden kohlenstoffhaltigen Ofenmauerwerk bzw. aus der Atmosphäre Gefügeänderungen erfährt, die seine Stabilität beeinträchtigen.Furthermore, there is a risk that the metal housing made of sheet steel, due to the absorption of carbon or nitrogen from the surrounding carbon-containing furnace masonry or from the atmosphere, will experience structural changes which impair its stability.

Nach der Erfindung werden diese Nachteile bei einem feuerfesten, gasdurchlässigen Baukörper dadurch vermieden, dass er aus einem gasdurchlässigen feuerfesten Stein besteht, der von einem ersten Metallgehäuse dicht, gegebenenfalls unter Zwischenschaltung einer Mörtelschicht, umschlossen ist, dass das erste Metallgehäuse von einem im Abstand davon angeordneten zweiten Metallgehäuse umgeben ist, dass zwischen den beiden Metallgehäusen eine feuerfeste, im wesentlichen gasundurchlässige Füllmasse angeordnet ist und dass an einer Stirnfläche des Steines mindestens ein Anschluss und ein Verteilungsraum für die Gaszufuhr angeordnet sind.According to the invention, these disadvantages are avoided in the case of a refractory, gas-permeable structure in that it consists of a gas-permeable refractory stone which is tightly enclosed by a first metal housing, optionally with the interposition of a mortar layer, in that the first metal housing is arranged at a distance from it is surrounded by the second metal housing, that a refractory, essentially gas-impermeable filling compound is arranged between the two metal housings and that at least one connection and a distribution space for the gas supply are arranged on an end face of the stone.

Die Füllmasse und das zweite Metallgehäuse, welche das erste Metallgehäuse umgeben, schützen dieses vor der Deformation durch den Gasdruck sowie vor der Aufkohlung und Aufstickung.The filling compound and the second metal housing, which surround the first metal housing, protect it from deformation by the gas pressure and from carburizing and nitriding.

Das zweite, äussere Metallgehäuse weist zweckmässig zylindrische oder kegelstumpfförmige Form mit Kreisquerschnitt auf, wodurch die Gefahr gebannt ist, dass es seinerseits verformt werden könnte. Ferner ist nun auch der Einsatz bei solchen Anwendungsfällen möglich, wo Spülsteine mit Kreisquerschnitt verlangt werden, wie z.B. in Pfannen. Da nun das erste, innere Metallgehäuse vor Deformationen durch den Gasdruck geschützt ist, stört es nicht, wenn es einen rechteckigen oder quadratischen Querschnitt besitzt, wie dies im Interesse der rationellen Fertigung des Spülsteins erwünscht ist.The second, outer metal housing expediently has a cylindrical or frustoconical shape with a circular cross section, which eliminates the risk that it in turn could be deformed. Furthermore, it is now also possible to use it in such applications where flushing blocks with a circular cross section are required, e.g. in pans. Since the first, inner metal housing is now protected from deformations by the gas pressure, it does not bother if it has a rectangular or square cross section, as is desired in the interest of the rational production of the sink.

Um den Spülstein gegen das Herausfallen aus der Umhüllung zu sichern, können am ersten, inneren Metallgehäuse, insbesondere an seinen der Gaszufuhr benachbarten, d.h. kaltseitigen Bereichen, Blechplättchen angeordnet, z.B. angeschweisst, sein, welche zwecks Verankerung in die feuerfeste Füllmasse ragen. Desgleichen können auch am zweiten, äusseren Metallgehäuse solche Blechplättchen angebracht sein, die nach aussen ragen und sich beim Einbau des Baukörpers etwa in einen Ofenboden in der den Baukörper umgebenden Stampfmasse zwischen dem gasdurchlässigen Baukörpers und den Bodensteinen verkrallen.In order to prevent the sink from falling out of the casing, the first, inner metal housing, in particular the one adjacent to the gas supply, e.g. cold-side areas, sheet metal plates arranged, e.g. be welded on, which protrude into the refractory filling compound for anchoring. Likewise, such sheet metal plates can also be attached to the second, outer metal housing, which protrude outwards and, when the structure is installed, claw between the gas-permeable structure and the floor stones, for example in a furnace floor in the ramming mass surrounding the structure.

Der innerhalb des ersten Metallgehäuses befindliche gasdurchlässige feuerfeste Spülstein kann aus einzelnen, an Längsflächen, gegebenenfalls unter Zwischenschaltung von Metallauflagen oder -einlagen, aneinanderliegenden Segmenten aufgebaut sein. Der Spülstein bzw. die Segmente können mit eingebetteten, vorzugsweise mitverpressten Blechpaaren versehen sein, wobei durch den Spalt zwischen den Blechen eines Paares der Gasdurchgang erfolgt. Ferner können die aneinanderliegenden Längsflächen der Segmente mit Profilierungen, wie Rillen oder Wellen, versehen sein, um die Gasdurchlässigkeit der Steine zu erhöhen.The gas-permeable refractory sink located within the first metal housing can be constructed from individual segments lying on one another on longitudinal surfaces, optionally with the interposition of metal supports or inserts. The sink or the segments can be provided with embedded, preferably also pressed-in pairs of sheets, the passage of gas taking place through the gap between the sheets of a pair. Furthermore, the adjacent longitudinal surfaces of the segments can be provided with profiles, such as grooves or shafts, in order to ensure gas permeability to increase the stones.

Der Spülstein bzw. die ihn bildenden Segmente bestehen aus gebrannten oder ungebrannten, z.B. mit einem Kohlenstoffträger, wie Teer, Pech, Kunstharz, gebundenem oder chemisch gebundenem feuerfestem Material, wie Sintermagnesia, Mischungen von Magnesia und Chromerz, vorreagiertem Magnesia-Chromerz-Sinterkorn, Hochtonerdematerial.The sink or the segments forming it consist of burned or unfired, e.g. with a carbon carrier, such as tar, pitch, synthetic resin, bound or chemically bound refractory material, such as sintered magnesia, mixtures of magnesia and chrome ore, pre-reacted magnesia-chrome ore sintered grain, high alumina material.

Diese Feuerfeststoffe eignen sich auch für die Füllmasse, die mit einem chemischen oder einem kohlenstoffhaltigen Bindemittel versehen, als Stampf- oder Giessmasse zwischen die beiden Metallgehäuse eingebracht wird.These refractories are also suitable for the filling compound, which is provided with a chemical or a carbon-containing binder, is introduced as a tamping or casting compound between the two metal housings.

Als Material für die Metallgehäuse eignet sich insbesondere Stahlblech, z.B. in einer Stärke zwischen 1 und 3 mm.Sheet metal, e.g. in a thickness between 1 and 3 mm.

Die Erfindung wird an Hand der Zeichnung näher erläutert, die einen erfindungsgemässen Baukörper zeigt.The invention is explained in more detail with reference to the drawing, which shows a structure according to the invention.

Der Baukörper 1 besteht aus dem eigentlichen Spülstein 2, der von einem ersten, inneren Metallgehäuse 3 mit rechteckigem Querschnitt umschlossen ist. Im Abstand davon ist ein zweites, äusseres Metallgehäuse 4 mit Kreisquerschnitt angeordnet und der Raum zwischen den beiden Metallgehäusen 3 und 4 ist mit einer feuerfesten Füllmasse 5 ausgefüllt..Am inneren Metallgehäuse 3 sind Blechplättchen 6 angeschweisst, die zwecks Verankerung in die feuerfeste Füllmasse 5 ragen.The structure 1 consists of the actual sink 2, which is enclosed by a first, inner metal housing 3 with a rectangular cross section. A second outer metal housing 4 with a circular cross section is arranged at a distance from it and the space between the two metal housings 3 and 4 is filled with a refractory filling compound 5 .

Der innerhalb des ersten Metallgehäuses 3 befindliche Spülstein 2 besteht im dargestellten Ausführungsbeispiel aus zwölf vorgefertigten Segmenten 7 aus feuerfestem Material, die in zwei Reihen zu je sechs Stück angeordnet sind. In die Fugen zwischen den Segmenten 7 sind Blechplatten 8 eingelegt, längs welchen der Gasdurchgang erfolgt.The sink 2 located within the first metal housing 3 consists in the illustrated embodiment of twelve prefabricated segments 7 made of refractory material, which are arranged in two rows of six pieces. Sheet metal plates 8 are inserted into the joints between the segments 7, along which the gas passage takes place.

Die Segmente 7 sind mittels zweier Leisten 9, die an der Innenseite des ersten Metallgehäuses 3 angeordnet und an diesem vorzugsweise durch Punktschweissen befestigt sind, von der Stirnseite des ersten Metallgehäuses 3 beabstandet.'An dieser Stirnseite, welche zusammen mit der bezüglichen, in einer Ebene liegenden Fläche der Füllmasse 5 die Kaltseite des Baukörpers 1 bildet,-ist eine Platte 10 dicht angeschweisst. Diese in der Zeichnung teilweise weggebrochen dargestellte Platte 10 ist mit einem Rohranschluss 11 versehen, über den das Gas in den zwischen der Platte 10 und der Stirnseite des Spülsteins 2 freibleibenden Verteilungsraum einbringbar ist.The segments 7 are by means of two strips 9, which are arranged on the inside of the first metal housing 3 and on this are preferably attached by spot welding, spaced from the end face of the first metal housing 3. 'At this end face, which forms the cold side of the structure 1 together with the relevant, lying in a plane surface of the filling material 5, -is tightly welded a plate tenth This plate 10, shown partially broken away in the drawing, is provided with a pipe connection 11, via which the gas can be introduced into the distribution space which remains free between the plate 10 and the end face of the sink 2.

Als Füllmasse 5 kann beispielsweise eine Masse aus Sintermagnesia mit folgender Zusammensetzung und folgendem Kornaufbau dienen:

Figure imgb0001
Diese z.B. mit einem Chromat-Bindemittel versehene Masse kann mit einem Zusatz von 4,5 Gew.-% Wasser, bezogen auf die trockene Masse, als Stampfmasse in den Raum zwischen den beiden Metallgehäusen 3 und 4 eingebracht und dort eingestampft werden.For example, a mass of sintered magnesia with the following composition and the following grain structure can serve as the filling mass 5:
Figure imgb0001
 This mass, which is provided, for example, with a chromate binder, can be introduced into the space between the two metal housings 3 and 4 with an addition of 4.5% by weight of water, based on the dry mass, and pounded there.

Mit einem Zusatz von 8 Gew.-% Wasser, bezogen auf die trockene Masse, kann die Masse in dem Raum zwischen den beiden Metallgehäusen 3 und 4 mittels eines in die Masse eingebrachten Innenrüttlers verdichtet werden. Bei noch höherer Wasserzugabe wäre auch die Anwendung als Giessmasse möglich.With the addition of 8% by weight of water, based on the dry mass, the mass in the space between the two metal housings 3 and 4 can be compressed by means of an internal vibrator introduced into the mass. If the amount of water added is even higher, use as a casting compound would also be possible.

Claims (5)

1. Feuerfester, gasdurchlässiger Baukörper zum Einblasen eines Gases in ein Metallbehandlungsgefäss durch dessen Auskleidung hindurch, dadurch gekennzeich- net, dass er aus einem gasdurchlässigen feuerfesten Stein besteht, der von einem ersten Metallgehäuse dicht, gegebenenfalls unter Zwischenschaltung einer Mörtelschicht, umschlossen ist, dass das erste Metallgehäuse von einem im Abstand davon angeordneten zweiten Metallgehäuse umgeben ist, dass zwischen den beiden Metallgehäusen eine feuerfeste, im wesentlichen gasundurchlässige Füllmasse angeordnet ist und dass an einer Stirnfläche des Steines mindestens ein Anschluss und ein Verteilungsraum für die Gaszufuhr angeordnet sind.1. Refractory, gas-permeable structure for blowing a gas into a metal treatment vessel through its lining, characterized in that it consists of a gas-permeable refractory stone which is sealed by a first metal housing, optionally with the interposition of a layer of mortar, that the the first metal housing is surrounded by a second metal housing arranged at a distance therefrom, that a refractory, substantially gas-impermeable filling compound is arranged between the two metal housings and that at least one connection and a distribution space for the gas supply are arranged on an end face of the stone. 2. Baukörper nach Anspruch 1, dadurch gekenn- zeichnet, dass der gasdurchlässige feuerfeste Stein aus einzelnen, an Längsflächen, gegebenenfalls unter Zwischenschaltung von Metallauflagen oder -einlagen, aneinanderliegenden Segmenten aufgebaut ist.2. Building structure according to claim 1, characterized in that the gas-permeable refractory stone is made up of individual segments lying against one another on longitudinal surfaces, optionally with the interposition of metal supports or inserts. 3. Baukörper nach Anspruch 1 oder 2, dadurch ge- kennzeichnet, dass das erste Metallgehäuse des gasdurchlässigen feuerfesten Steins einen rechteckigen oder quadratischen Querschnitt besitzt.3. Structure according to claim 1 or 2, characterized in that the first metal housing of the gas-permeable refractory brick has a rectangular or square cross section. "4. Baukörper nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das zweite Metallgehäuse zylindrische oder kegelstumpfförmige Form aufweist."4. Structure according to one of claims 1 to 3, characterized in that the second metal housing has a cylindrical or frustoconical shape. 5. Baukörper nach einem der Ansprüche 1 bis 4., dadurch gekennzeichnet, dass am ersten Metallgehäuse, insbesondere an seinen der Gaszufuhr benachbarten Bereichen, Blechplättchen angeordnet sind, welche zwecks Verankerung in die feuerfeste Füllmasse ragen.5. Building structure according to one of claims 1 to 4, characterized in that on the first metal housing, in particular on its areas adjacent to the gas supply, sheet metal plates are arranged which protrude into the refractory filling compound for anchoring.
EP81630045A 1980-07-09 1981-06-15 Gas-permeable body of fire-resistant material Expired EP0043787B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81630045T ATE7310T1 (en) 1980-07-09 1981-06-15 FIRE-RESISTANT, GAS-PERMEABLE STRUCTURE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU82597 1980-07-09
LU82597A LU82597A1 (en) 1980-07-09 1980-07-09 FIRE-RESISTANT, GAS-PERMEABLE CONSTRUCTION

Publications (2)

Publication Number Publication Date
EP0043787A1 true EP0043787A1 (en) 1982-01-13
EP0043787B1 EP0043787B1 (en) 1984-05-02

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EP81630045A Expired EP0043787B1 (en) 1980-07-09 1981-06-15 Gas-permeable body of fire-resistant material

Country Status (12)

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US (1) US4378106A (en)
EP (1) EP0043787B1 (en)
JP (1) JPS5747840A (en)
AT (1) ATE7310T1 (en)
AU (1) AU539753B2 (en)
BR (1) BR8104287A (en)
CA (1) CA1176460A (en)
DE (1) DE3163373D1 (en)
ES (1) ES259133Y (en)
LU (1) LU82597A1 (en)
PT (1) PT73305B (en)
ZA (1) ZA814143B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061987A1 (en) * 1981-03-23 1982-10-06 Arbed S.A. Process and apparatus for treating molten metals in the framework of metallurgical processing
EP0063532A1 (en) * 1981-04-22 1982-10-27 Arbed S.A. Method and process for the instantaneous production of liquid iron
EP0064019A1 (en) * 1981-04-24 1982-11-03 Arbed S.A. Process and apparatus for the desulphurisation of iron-based melts
FR2516938A1 (en) * 1981-11-23 1983-05-27 Usinor DEVICE FOR INTRODUCING GAS INTO THE LIQUID METAL BATH
EP0097610A1 (en) * 1982-06-18 1984-01-04 Arbed S.A. Method of and installation for emptying metallurgical vessels
EP0146079A2 (en) * 1983-12-12 1985-06-26 Arbed S.A. Gas-permeable refractory plug
US4744546A (en) * 1986-02-03 1988-05-17 Voest-Alpine Aktiengesellschaft Flushing arrangement for a metallurgical vessel
DE3716388C1 (en) * 1987-05-15 1988-10-27 Radex Deutschland Ag Gas flushing stone
EP0311785A1 (en) * 1987-10-14 1989-04-19 PA-HA-GE HÜTTEN UND GIESSEREIBEDARF GMBH & CO. KG Stirring brick for metallurgical vessels

Families Citing this family (8)

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US4462576A (en) * 1982-02-24 1984-07-31 Didier-Werke Ag Apparatus for supplying gas through the wall of a metallurgical container
LU84213A1 (en) * 1982-06-18 1983-11-23 Arbed DEVICE FOR DRAINING METALLURGICAL CONTAINERS
DE3318422C2 (en) * 1983-05-20 1985-03-21 Didier-Werke Ag, 6200 Wiesbaden Gas purging arrangement and method for actuating such an arrangement
AT382889B (en) * 1984-03-15 1987-04-27 Voest Alpine Ag RINSING DEVICE FOR A METALLURGICAL VESSEL
US4754954A (en) * 1986-01-29 1988-07-05 Lazcano Navarro Arturo Refractory device for introducing a gas into a molten metal and a method for making the device
JPH03104067U (en) * 1990-02-05 1991-10-29
US7192989B2 (en) * 2002-12-20 2007-03-20 Akzo Nobel N.V. Method and expansion device for preparing expanded thermoplastic microspheres
CN106825533A (en) * 2015-12-03 2017-06-13 刘得顺 A kind of preparation method for repairing combined air brick

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DE1726983U (en) * 1956-05-29 1956-07-26 Aluminiumwerke Nuernberg G M B DEVICE FOR INTRODUCING GAS INTO METALLIC MELT.
US3610602A (en) * 1969-10-14 1971-10-05 United States Steel Corp Gas-permeable refractory plug and method
DE1533886B2 (en) * 1966-06-27 1975-04-03 L'air Liquide, S.A. Pour L'etude Et L'exploitation Des Procedes Georges Claude, Paris Device for injecting a fluid into a container containing a molten metal
GB1452909A (en) * 1973-10-24 1976-10-20 Electricity Council Injectors for injecting gas into molten metal
US4053147A (en) * 1975-04-24 1977-10-11 Swiss Aluminium Ltd. Device for introduction of gases into reaction vessels containing fluids
LU81208A1 (en) * 1979-04-25 1980-12-16 Arbed DEVICE FOR INJECTING GAS THROUGH THE BOTTOM INTO THE METAL BATH CONTAINED IN A REFINING CONTAINER

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JPS505849U (en) * 1973-05-14 1975-01-22
SE392479B (en) * 1974-03-20 1977-03-28 Asea Ab FORMA AT METALLURGIC CONVERTERS AND MELTING OVEN
JPS5610433Y2 (en) * 1976-03-24 1981-03-09
CS241483B2 (en) * 1980-06-25 1986-03-13 Arbed Refractory building body

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Publication number Priority date Publication date Assignee Title
BE498983A (en) * 1949-11-03 1951-02-15
DE1726983U (en) * 1956-05-29 1956-07-26 Aluminiumwerke Nuernberg G M B DEVICE FOR INTRODUCING GAS INTO METALLIC MELT.
DE1533886B2 (en) * 1966-06-27 1975-04-03 L'air Liquide, S.A. Pour L'etude Et L'exploitation Des Procedes Georges Claude, Paris Device for injecting a fluid into a container containing a molten metal
US3610602A (en) * 1969-10-14 1971-10-05 United States Steel Corp Gas-permeable refractory plug and method
GB1452909A (en) * 1973-10-24 1976-10-20 Electricity Council Injectors for injecting gas into molten metal
US4053147A (en) * 1975-04-24 1977-10-11 Swiss Aluminium Ltd. Device for introduction of gases into reaction vessels containing fluids
LU81208A1 (en) * 1979-04-25 1980-12-16 Arbed DEVICE FOR INJECTING GAS THROUGH THE BOTTOM INTO THE METAL BATH CONTAINED IN A REFINING CONTAINER

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061987A1 (en) * 1981-03-23 1982-10-06 Arbed S.A. Process and apparatus for treating molten metals in the framework of metallurgical processing
EP0063532A1 (en) * 1981-04-22 1982-10-27 Arbed S.A. Method and process for the instantaneous production of liquid iron
EP0064019A1 (en) * 1981-04-24 1982-11-03 Arbed S.A. Process and apparatus for the desulphurisation of iron-based melts
FR2516938A1 (en) * 1981-11-23 1983-05-27 Usinor DEVICE FOR INTRODUCING GAS INTO THE LIQUID METAL BATH
EP0080403A1 (en) * 1981-11-23 1983-06-01 UNION SIDERURGIQUE DU NORD ET DE L'EST DE LA FRANCE par abréviation "USINOR" Installation for introducing gas into a bath of liquid metal
EP0097610A1 (en) * 1982-06-18 1984-01-04 Arbed S.A. Method of and installation for emptying metallurgical vessels
EP0146079A2 (en) * 1983-12-12 1985-06-26 Arbed S.A. Gas-permeable refractory plug
EP0146079A3 (en) * 1983-12-12 1987-01-07 Arbed S.A. Gas-permeable refractory plug
US4744546A (en) * 1986-02-03 1988-05-17 Voest-Alpine Aktiengesellschaft Flushing arrangement for a metallurgical vessel
DE3716388C1 (en) * 1987-05-15 1988-10-27 Radex Deutschland Ag Gas flushing stone
EP0290766A2 (en) * 1987-05-15 1988-11-17 Radex Deutschland Aktiengesellschaft für feuerfeste Erzeugnisse Gas flushing plug
EP0290766A3 (en) * 1987-05-15 1989-06-28 Radex Deutschland Aktiengesellschaft Fur Feuerfeste Erzeugnisse Gas flushing plug
EP0311785A1 (en) * 1987-10-14 1989-04-19 PA-HA-GE HÜTTEN UND GIESSEREIBEDARF GMBH & CO. KG Stirring brick for metallurgical vessels

Also Published As

Publication number Publication date
EP0043787B1 (en) 1984-05-02
PT73305B (en) 1982-09-01
JPH028004B2 (en) 1990-02-22
AU7264281A (en) 1982-01-14
AU539753B2 (en) 1984-10-11
ATE7310T1 (en) 1984-05-15
US4378106A (en) 1983-03-29
JPS5747840A (en) 1982-03-18
BR8104287A (en) 1982-03-23
ES259133Y (en) 1982-06-16
CA1176460A (en) 1984-10-23
LU82597A1 (en) 1982-02-17
ZA814143B (en) 1982-07-28
DE3163373D1 (en) 1984-06-07
PT73305A (en) 1981-08-01
ES259133U (en) 1982-01-01

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