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WO1997018335A2 - Fireproof moulding plates with gas ducts - Google Patents

Fireproof moulding plates with gas ducts Download PDF

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Publication number
WO1997018335A2
WO1997018335A2 PCT/DE1996/002149 DE9602149W WO9718335A2 WO 1997018335 A2 WO1997018335 A2 WO 1997018335A2 DE 9602149 W DE9602149 W DE 9602149W WO 9718335 A2 WO9718335 A2 WO 9718335A2
Authority
WO
WIPO (PCT)
Prior art keywords
gas
refractory
plates
sheet metal
channels
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.)
Ceased
Application number
PCT/DE1996/002149
Other languages
German (de)
French (fr)
Other versions
WO1997018335A3 (en
Inventor
Lorenz Dötsch
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.)
Dotsch Marie-Luise
Original Assignee
Dotsch Marie-Luise
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dotsch Marie-Luise filed Critical Dotsch Marie-Luise
Priority to AU18668/97A priority Critical patent/AU1866897A/en
Priority to BR9611717A priority patent/BR9611717A/en
Priority to IL12446396A priority patent/IL124463A0/en
Priority to KR1019980703579A priority patent/KR19990067556A/en
Priority to EP96945982A priority patent/EP0862506A2/en
Priority to JP9518501A priority patent/JP2000500527A/en
Publication of WO1997018335A2 publication Critical patent/WO1997018335A2/en
Publication of WO1997018335A3 publication Critical patent/WO1997018335A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/072—Treatment with gases
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/48—Bottoms or tuyéres of converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge

Definitions

  • the invention relates to a method for injecting gases into refractory-lined hot rooms or metallurgical vessels using refractory gas guide bodies with directed porosity, the gas guide channels of which open in the area of the hot side of the refractory lining.
  • the invention relates to a method for the production of refractory shaped plates for the injection of gases into refractory-lined hot rooms or metallurgical vessels and the use of such shaped plates.
  • the invention relates to a gas purging plug for metallurgical vessels, with a refractory molded block, a gas-tight sheet metal casing, consisting of a sheet metal jacket surrounding the lateral peripheral region of the molded block and a sheet metal base on the cold side of the molded block facing away from the melt and a gas supply pipe connected to the sheet metal base.
  • the invention has for its object to provide a method for injecting gases into such hot rooms or metallurgical vessels, with which the blowing times can be shortened. This object is achieved by the characterizing features of claim 1.
  • the thin-walled refractory mold plates used in this process can be produced by a process as stated in claim 2.
  • the gas channels running inside the shaped blocks can run in the longitudinal direction of the refractory shaped plates, but they can also be comb-like and open on adjacent sides of the shaped plate.
  • the channels can have different cross sections, which are formed by inserting strips of different thicknesses.
  • the mold plates according to the invention with the inner gas guide channels are also particularly suitable for the production of gas purging stones with directed porosity, as described in claims 4 to 9.
  • the gas passage channels are formed, for example, in that threads or tapes are worked into the shaped green body when filling the casting mold with pasty refractory material, which then have to be pulled out of the green body.
  • the gas passage channels In the known gas purging stones, however, it can be difficult to produce the gas passage channels with a constant cross section over their length, since the inner surface of the channels damaged when pulling out the inserted strips or the plates with the embossed grooves are difficult to place exactly on top of each other.
  • the gas passage channels must be so narrow that molten metal does not penetrate into the interior of the channels in the unpressurized state and can solidify there.
  • the gas passage channels located in the interior of the mold plates allow the mold plates to be joined together in any way when the washing body is formed, since this no longer impairs the cross-sectional constancy of the channels. This considerably simplifies the production of the entire gas flushing plug.
  • the refractory shaped plates are made from rolled green compacts, so that the refractory material is comparatively highly compressed and a low porous material is produced which has a correspondingly high wear resistance.
  • the flushing body consisting of the individual shaped plates is preferably seen above a porous block of material which has an undirected porosity when viewed in the use position of the gas flushing block.
  • This arrangement makes it possible to visually recognize the state of wear of the gas purging plug when it has been worked down to the area of the porous block. Then, in the bottom area of the pan, a circular, dark spot is formed, which is caused by the increased cooling effect of the inflowing gas.
  • a gas distribution space is expediently provided between the underside of the shaped block or the porous block and the sheet metal base, so that the gas to be fed in directly into the porous block or onto it without flow resistance subsequent sink can reach.
  • the shaped plates can already be connected to one another by rolling or pressing during the production of the green bodies.
  • the gas-tight connection of the individual mold plates is facilitated in that they are produced with the aid of a rolling process and as a result have very smooth and uniform surfaces.
  • Form plates assembled in this way can also absorb the very high thermal stresses that occur much better, since any cracks that arise generally only extend to the outside of the neighboring plate.
  • the shaped plates produced by rolling preferably have a thickness between 1 and 10 mm and a width between 10 and 100 mm, so that the respective flushing bodies can be adapted to almost all gas flushing stone sizes.
  • the refractory mold plates can, for. B. consist of a mixture of A1 2 0 3 , MgO and ZrO, which are mixed with water and whose pasty consistency is adjusted so that they can be shaped with the help of a rolling process.
  • the gas passage channels running inside the refractory mold plates are produced according to the invention during the rolling process of the green compacts or a corresponding endless strip, which is divided after the rolling, in that a desired number of strips made of a burnable or meltable one are compared to the deformation forces occurring during the rolling are comparatively dimensionally stable. After the subsequent melting or burning out, these film strips form the later gas passage channels in the interior of the individual shaped plates with a very precise and uniform cross section.
  • the film strips can be continuously fed to the roll gap in a very simple manner in the mentioned rolling process, the rolling process being e.g. B. can be done in that the roll gap two different tapes of pre-prepared refractory material run or the material is introduced in the form of a single strand in the roll gap.
  • Such rolling processes can be found, for example, in EP 0 536 584 A2 or DE-PS 41 33 712 C2.
  • the resulting shaped plates are solidified by a heat treatment to be carried out after the rolling, with melting or burning out of the film, and can then be installed in the interior of the gas purging plug in a known manner while encapsulating with pasty refractory material.
  • FIG. 1 is a perspective view of a mold plate with a comb-shaped gas passage
  • FIG. 2 is a perspective view of a mold plate with three gas passage channels
  • FIG. 3 shows a perspective view of a washing body composed of a plurality of shaped plates
  • Fig. 4 shows a section through a gas purging plug with rinsing body and porous lower block
  • FIG. 5 shows a partial section through the gas purging plug according to FIG. 4.
  • FIGS. 1 and 2 show shaped plates 1 and 2 produced by rolling with gas passage channels 3 running in the longitudinal direction, the shaped plate 1 according to FIG. 1 having a comb-shaped gas passage channel 3 and the shaped plate 2 according to FIG. 2 showing three gas passage channels 3 on- points.
  • the number or dimensions of the gas passage channels 3 are based on the available injection areas or the desired gas throughputs and pressures.
  • FIG. 3 schematically shows a flushing body 4 formed by gluing the individual mold plates 2, on the hot side 5 facing the melt of which a plurality of gas passage channels 3 open.
  • gas sink 6 consists of a refractory material 7, which is surrounded laterally by a conical sheet metal jacket 8 and a lower sheet metal base 9.
  • a gas feed pipe 10 is welded to the sheet metal base 9.
  • a gas distribution space 12 is located between the underside 11 of the refractory material 7 and the sheet metal base 9.
  • the purging body 4 is arranged, which is traversed by a multiplicity of gas passage channels 3.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Incineration Of Waste (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

In order to blow gases into hot chambers with fireproof linings and create a gas sink (6) with directional porosity, it is proposed that moulding plates should be used made from rolled green compacts permeated in their interior by gas through-flow ducts (3). The latter are produced during the rolling operation by rolling in or working in dimensionally stable foils of a material which can be melted out or burned out. Once the green compacts have been rolled, the foils are melted out or burned out.

Description

Feuerfeste Formplatten mit Gasführungskanälen Fireproof molded panels with gas routing channels

Die Erfindung betrifft ein Verfahren zum Eindusen von Gasen in feuerfest ausgekleidete Heißräume oder metallurgische Gefäße unter Verwendung von feuerfesten Gasführungskörpern mit ge¬ richteter Porosität, deren Gasführungskanäle im Bereich der Heißseite der Feuerfestauskleidung münden.The invention relates to a method for injecting gases into refractory-lined hot rooms or metallurgical vessels using refractory gas guide bodies with directed porosity, the gas guide channels of which open in the area of the hot side of the refractory lining.

Darüber hinaus betrifft die Erfindung ein Verfahren zur Her¬ stellung von Feuerfestformplatten zum Eindusen von Gasen in feuerfest ausgekleidete Heißräume oder metallurgische Gefäße und die Verwendung derartiger Formplatten.In addition, the invention relates to a method for the production of refractory shaped plates for the injection of gases into refractory-lined hot rooms or metallurgical vessels and the use of such shaped plates.

Schließlich betrifft die Erfindung einen Gasspülstein für me¬ tallurgische Gefäße, mit einem feuerfesten Formstein, einer gasdichten Blechumkleidung, bestehend aus einem den seitlichen Umfangsbereich des Formsteins umgebenden Blechmantel sowie einem Blechboden auf der der Schmelze abgewandten Kaltseite des Formsteins und einem an den Blechboden angeschlossenen Gaszuführungsrohr.Finally, the invention relates to a gas purging plug for metallurgical vessels, with a refractory molded block, a gas-tight sheet metal casing, consisting of a sheet metal jacket surrounding the lateral peripheral region of the molded block and a sheet metal base on the cold side of the molded block facing away from the melt and a gas supply pipe connected to the sheet metal base.

Bei den bisher bekannten Verfahren und Vorrichtungen zum Ein¬ dusen von Gasen in feuerfest ausgekleidete Heißräume oder me- tallurgische Gefäße werden Düsensteine, Gasspülsteine oder Lanzen verwendet, die das Gas in die Heißräume oder mit einer metallischen Schmelze gefüllten Gefäße nur an den Stellen punktuell einblasen können, wo die entsprechenden Spüler ein¬ gesetzt sind. Dadurch kommt es zu einer ungleichmäßigen Beauf- schlagung beispielsweise der Schmelze mit Gas, so daß zum Bei¬ spiel der gewünschte metallurgische Effekt eine Reinigung oder eine Homogenisierung der Schmelze nur bei sehr langen Blaszei¬ ten erreicht wird.In the previously known methods and devices for injecting gases into refractory-lined hot rooms or metallurgical vessels, nozzle stones, gas purging stones or lances are used which can blow the gas into the hot rooms or vessels filled with a metallic melt only at certain points where the corresponding rinsers are used. This results in an uneven application of gas to the melt, for example, so that, for example, the desired metallurgical effect, cleaning or homogenization of the melt is only achieved with very long blowing times.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Eindusen von Gasen in derartige Heißräume oder metallurgische Gefäße zu schaffen, mit dem die Blaszeiten verkürzt werden können. Diese Aufgabe wird durch die kennzeichnenden Merkmale des An¬ spruchs 1 gelöst.The invention has for its object to provide a method for injecting gases into such hot rooms or metallurgical vessels, with which the blowing times can be shortened. This object is achieved by the characterizing features of claim 1.

Die bei diesem Verfahren verwendeten dünnwandigen Feuerfest- formplatten können nach einem Verfahren hergestellt werden, wie es in Anspruch 2 angegeben wird.The thin-walled refractory mold plates used in this process can be produced by a process as stated in claim 2.

Mit derartigen Feuerfestformplatten, die zum Beispiel leisten¬ artig in die Feuerfestausmauerung eines Tundish eingesetzt sind, kann die gesamte Metallschmelze sehr gleichmäßig mit Spülgas oder anderen Gasen beaufschlagt werden.With such refractory shaped plates, which are inserted, for example, in the fireproof brickwork of a tundish, the entire molten metal can be charged with flushing gas or other gases very evenly.

Die im Inneren der Formsteine verlaufenden Gaskanäle können dabei in Längsrichtung der feuerfesten Formplatten laufen, sie können jedoch auch kammartig ausgebildet sein und an benach¬ barten Seiten der Formplatte münden. Darüber hinaus können die Kanäle unterschiedliche Querschnitte aufweisen, die durch das Einlegen entsprechend unterschiedlich dicker Streifen ausge¬ bildet werden.The gas channels running inside the shaped blocks can run in the longitudinal direction of the refractory shaped plates, but they can also be comb-like and open on adjacent sides of the shaped plate. In addition, the channels can have different cross sections, which are formed by inserting strips of different thicknesses.

Die erfindungsgemäßen Formplatten mit den inneren Gasführungs¬ kanälen eignen sich darüber hinaus vorzüglich zur Herstellung von Gasspülsteinen mit gerichteter Porosität, wie sie in den Patentansprüchen 4 bis 9 beschrieben sind.The mold plates according to the invention with the inner gas guide channels are also particularly suitable for the production of gas purging stones with directed porosity, as described in claims 4 to 9.

Bei bekannten Gasspülsteinen mit gerichteter Porosität werden die Gasdurchtrittskanäle zum Beispiel dadurch gebildet, daß in den Formsteingrünling beim Auffüllen der Gießform mit pastöser Feuerfestmasse Fäden oder Bänder eingearbeitet werden, die an- schließend aus dem Grünling herausgezogen werden müssen.In the case of known gas purging stones with directed porosity, the gas passage channels are formed, for example, in that threads or tapes are worked into the shaped green body when filling the casting mold with pasty refractory material, which then have to be pulled out of the green body.

Bei einem anderen bekannten Gasspülstein weden zur Bildung der Gasdurchtrittskanäle Platten zusammengelegt, in deren Ober¬ fläche mehrere parallel verlaufende Nuten eingearbeitet sind.In another known gas purging plug, plates are put together to form the gas passage channels, in the surface of which several parallel grooves are incorporated.

Bei den bekannten Gasspülsteinen kann es jedoch schwierig sein, die Gasdurchtrittskanäle mit über ihre Länge konstantem Querschnitt herzustellen, da die innere Oberfläche der Kanäle beim Herausziehen der eingelegten Streifen beschädigt bzw. die Platten mit den eingeprägten Nuten nur schwer exakt überein- andergelegt werden können. Außerdem müssen die Gasdurchtritts¬ kanäle so eng sein, daß flüssige Metallschmelze im drucklosen Zustand nicht ins Innere der Kanäle eindringen und dort er¬ starren kann.In the known gas purging stones, however, it can be difficult to produce the gas passage channels with a constant cross section over their length, since the inner surface of the channels damaged when pulling out the inserted strips or the plates with the embossed grooves are difficult to place exactly on top of each other. In addition, the gas passage channels must be so narrow that molten metal does not penetrate into the interior of the channels in the unpressurized state and can solidify there.

Durch die im Inneren der Formplatten liegenden Gasdurchtritts¬ kanäle können die Formplatten bei der Bildung des Spülkörpers im Prinzip beliebig zusammengefügt werden, da dadurch die Querschnittskonstanz der Kanäle nicht mehr beeinträchtigt wird. Dadurch wird die Herstellung des gesamten Gasspülsteins erheblich vereinfacht.In principle, the gas passage channels located in the interior of the mold plates allow the mold plates to be joined together in any way when the washing body is formed, since this no longer impairs the cross-sectional constancy of the channels. This considerably simplifies the production of the entire gas flushing plug.

Die feuerfesten Formplatten sind aus gewalzten Grünlingen her¬ gestellt, so daß das angemachte Feuerfestmaterial vergleichs¬ weise hoch verdichtet wird und ein niedrig poröses Material entsteht, das einen entsprechend hohen Verschleißwiderstand aufweist .The refractory shaped plates are made from rolled green compacts, so that the refractory material is comparatively highly compressed and a low porous material is produced which has a correspondingly high wear resistance.

Der aus den einzelnen Formplatten bestehende Spülkörper befin¬ det sich in Gebrauchslage des Gasspülsteins gesehen vorzugs¬ weise oberhalb eines porösen Materialblockes, der eine unge- richtete Porosität hat. Durch diese Anordnung wird es ermög- licht, den Verschleißzustand des Gasspülsteines optisch zu erkennen, wenn er bis auf den Bereich des porösen Blockes ab¬ gearbeitet ist. Dann bildet sich nämlich im Bodenbereich der Pfanne ein kreisrunder, dunkler Fleck, der aufgrund der erhöh¬ ten Kühlwirkung des einströmenden Gases hervorgerufen wird.The flushing body consisting of the individual shaped plates is preferably seen above a porous block of material which has an undirected porosity when viewed in the use position of the gas flushing block. This arrangement makes it possible to visually recognize the state of wear of the gas purging plug when it has been worked down to the area of the porous block. Then, in the bottom area of the pan, a circular, dark spot is formed, which is caused by the increased cooling effect of the inflowing gas.

Auch bei voller Pfanne ist der Verschleißzustand dann dadurch zu erkennen, daß vermehrte Badbewegungen im Oberflächenbereich auftreten.Even with a full pan, the state of wear can be recognized by the fact that increased bath movements occur in the surface area.

Zweckmäßigerweise ist zwischen der Unterseite des Formsteines bzw. dem porösen Block und dem Blechboden ein Gasverteilungs¬ raum vorgesehen, so daß das zuzuführende Gas ohne Strömungs¬ widerstände direkt in den porösen Block bzw. den sich daran anschließenden Spülkörper gelangen kann.A gas distribution space is expediently provided between the underside of the shaped block or the porous block and the sheet metal base, so that the gas to be fed in directly into the porous block or onto it without flow resistance subsequent sink can reach.

Die Formplatten können zur Bildung des bis auf die Gasdurch¬ trittskanäle gasdichten Spülkörpers bereits bei der Herstel- lung der Grünlinge durch Walzen oder Pressen miteinander ver¬ bunden werden. Andererseits ist es auch möglich, die Form¬ platten z. B. mit Hilfe eines feuerfesten Klebers miteinander zu verbinden. Das gasdichte Verbinden der einzelnen Formplat¬ ten wird dadurch erleichtert, daß diese mit Hilfe eines Walz- prozesses hergestellt sind und dadurch sehr glatte und gleich¬ mäßige Oberflächen aufweisen. Derartig zusammengefügte Form¬ platten können auch die auftretenden sehr hohen Wärmespannun- gen wesentlich besser aufnehmen, da eventuell entstehende Ris¬ se in der Regel nur bis zur Außenseite der Nachbarplatte ver- laufen.To form the flushing body which is gas-tight except for the gas passage channels, the shaped plates can already be connected to one another by rolling or pressing during the production of the green bodies. On the other hand, it is also possible to form the z. B. with the help of a refractory adhesive. The gas-tight connection of the individual mold plates is facilitated in that they are produced with the aid of a rolling process and as a result have very smooth and uniform surfaces. Form plates assembled in this way can also absorb the very high thermal stresses that occur much better, since any cracks that arise generally only extend to the outside of the neighboring plate.

Die durch Walzen hergestellten Formplatten weisen vorzugsweise eine Dicke zwischen 1 und 10 mm und eine Breite zwischen 10 und 100 mm auf, so daß die jeweiligen Spülkörper an fast alle Gasspülsteingrößen angepaßt werden können.The shaped plates produced by rolling preferably have a thickness between 1 and 10 mm and a width between 10 and 100 mm, so that the respective flushing bodies can be adapted to almost all gas flushing stone sizes.

Die feuerfesten Formplatten können z. B. aus einer Mischung von A1203, MgO und ZrO bestehen, die mit Wasser angemacht wer¬ den und deren teigige Konsistenz so eingestellt wird, daß sie mit Hilfe eines Walzvorganges geformt werden können.The refractory mold plates can, for. B. consist of a mixture of A1 2 0 3 , MgO and ZrO, which are mixed with water and whose pasty consistency is adjusted so that they can be shaped with the help of a rolling process.

Die im Inneren der feuerfesten Formplatten verlaufenden Gas¬ durchtrittskanäle werden erfindungsgemäß beim Walzvorgang der Grünlinge bzw. eines entsprechenden Endlosstreifens, der nach dem Walzen zerteilt wird, dadurch hergestellt, daß eine ge¬ wünschte Anzahl von Streifen aus einer ausbrennbaren oder auε- schmelzbaren, gegenüber den beim Walzen auftretenden Verfor¬ mungskräften vergleichsweise formstabilen Folie eingearbeitet werden. Diese Folienstreifen bilden nach dem anschließenden Ausschmelzen oder Ausbrennen die späteren, mit sehr exaktem und gleichmäßigem Querschnitt verlaufenden Gasdurchtrittska¬ näle im Inneren der einzelnen Formplatten. Die Folienstreifen können bei dem erwähnten Walzvorgang auf sehr einfache Weise kontinuierlich dem Walzenspalt zugeführt werden, wobei der Walzprozeß z. B. dadurch erfolgen kann, daß dem Walzenspalt zwei verschiedene Bänder aus vorgearbeitetem Feuerfestmaterial zulaufen oder das Material in Form eines einzigen Stranges in den Walzenspalt eingeführt wird. Der¬ artige Walzverfahren sind beispielsweise der EP 0 536 584 A2 oder der DE-PS 41 33 712 C2 zu entnehmen.The gas passage channels running inside the refractory mold plates are produced according to the invention during the rolling process of the green compacts or a corresponding endless strip, which is divided after the rolling, in that a desired number of strips made of a burnable or meltable one are compared to the deformation forces occurring during the rolling are comparatively dimensionally stable. After the subsequent melting or burning out, these film strips form the later gas passage channels in the interior of the individual shaped plates with a very precise and uniform cross section. The film strips can be continuously fed to the roll gap in a very simple manner in the mentioned rolling process, the rolling process being e.g. B. can be done in that the roll gap two different tapes of pre-prepared refractory material run or the material is introduced in the form of a single strand in the roll gap. Such rolling processes can be found, for example, in EP 0 536 584 A2 or DE-PS 41 33 712 C2.

Die entstehenden Formplatten werden durch eine nach dem Walzen vorzunehmende Wärmebehandlung unter Ausschmelzen bzw. Ausbren¬ nen der Folie gestaltverfestigt und können anschließend unter Umgießen mit pastösem feuerfestem Material in bekannter Art und Weise im Inneren des Gasspülsteins eingebaut werden.The resulting shaped plates are solidified by a heat treatment to be carried out after the rolling, with melting or burning out of the film, and can then be installed in the interior of the gas purging plug in a known manner while encapsulating with pasty refractory material.

Die Erfindung ist in der Zeichnung beispielsweise veranschau¬ licht und wird im nachfolgenden anhand der Zeichnung im ein¬ zelnen erläutert. Es zeigen:The invention is illustrated in the drawing, for example, and is explained in detail below with reference to the drawing. Show it:

Fig. 1 eine perspektivische Ansicht einer Formplatte mit einem kammartig ausgebildeten Gasdurchtrittskanal ,1 is a perspective view of a mold plate with a comb-shaped gas passage,

Fig. 2 eine perspektivische Ansicht einer Formplatte mit drei Gasdurchtrittskanälen,2 is a perspective view of a mold plate with three gas passage channels,

Fig. 3 eine perspektivische Ansicht eines aus mehreren Form¬ platten zusammengesetzten Spülkörpers,3 shows a perspective view of a washing body composed of a plurality of shaped plates,

Fig. 4 einen Schnitt durch einen Gasspülstein mit Spülkörper und porösem unteren Block undFig. 4 shows a section through a gas purging plug with rinsing body and porous lower block and

Fig. 5 einen Teilschnitt durch den Gasspülstein gemäß Fig. 4.5 shows a partial section through the gas purging plug according to FIG. 4.

Die Darstellungen in Fig. 1 und 2 zeigen durch Walzen herge- stellte Formplatten 1 bzw. 2 mit in Längsrichtung verlaufenden Gasdurchtrittskanälen 3, wobei die Formplatte 1 gemäß Fig. 1 einen kammartig ausgebildeten Gasdurchtrittskanal 3 und die Formplatte 2 gemäß Fig. 2 drei Gasdurchtrittskanäle 3 auf- weist .The illustrations in FIGS. 1 and 2 show shaped plates 1 and 2 produced by rolling with gas passage channels 3 running in the longitudinal direction, the shaped plate 1 according to FIG. 1 having a comb-shaped gas passage channel 3 and the shaped plate 2 according to FIG. 2 showing three gas passage channels 3 on- points.

Die Anzahl bzw. Abmessungen der Gasdurchtrittskanäle 3 sind auf die zur Verfügung stehenden Eindüsungsflachen bzw. die gewünschten Gasdurchsätze und -drücke abgestellt.The number or dimensions of the gas passage channels 3 are based on the available injection areas or the desired gas throughputs and pressures.

Fig. 3 zeigt schematisch einen durch Verkleben der einzelnen Formplatten 2 entstandenen Spülkörper 4, an dessen der Schmel¬ ze zugewandten Heißseite 5 eine Vielzahl von Gasdurchtrittska- nälen 3 münden.3 schematically shows a flushing body 4 formed by gluing the individual mold plates 2, on the hot side 5 facing the melt of which a plurality of gas passage channels 3 open.

Der in der Schnittdarstellung gem. Fig. 4 dargestellte Gas¬ spülstein 6 besteht aus einem Feuerfestmaterial 7, das von einem konischen Blechmantel 8 seitlich und einem unteren Blechboden 9 gasdicht umgeben wird. In dem Blechboden 9 ist ein Gaszuführungsrohr 10 angeschweißt.The gem in the sectional view. Fig. 4 shown gas sink 6 consists of a refractory material 7, which is surrounded laterally by a conical sheet metal jacket 8 and a lower sheet metal base 9. A gas feed pipe 10 is welded to the sheet metal base 9.

Zwischen der Unterseite 11 des Feuerfestmaterials 7 und dem Blechboden 9 befindet sich ein Gasverteilungsraum 12.A gas distribution space 12 is located between the underside 11 of the refractory material 7 and the sheet metal base 9.

Im Inneren des Gasspülsteins 6 ist der Spülkörper 4 angeord¬ net, der von einer Vielzahl von Gasdurchtrittskanälen 3 durch¬ zogen ist.In the interior of the gas purging block 6, the purging body 4 is arranged, which is traversed by a multiplicity of gas passage channels 3.

Unterhalb des Spülkörpers 4 befindet sich ein gasdurchlässiger Block 13 mit ungerichteter Porosität, der bei entsprechendem Abarbeitungszustand des Gasspülsteins 6 eine optische Ver¬ schleißanzeige bildet.Below the purging body 4 there is a gas-permeable block 13 with non-directional porosity, which forms an optical wear indicator when the gas purging plug 6 is in the appropriate processing state.

In der Draufsicht gemäß Fig. 5 wird die Lage des Spülkörpers 4 im Inneren des Gasspülsteins 6 verdeutlicht. O 97/18335 PC17DE96/021495 shows the position of the flushing body 4 inside the gas flushing block 6. O 97/18335 PC17DE96 / 02149

Feuerfeste Formplatten mit GasführungskanälenFireproof molded panels with gas routing channels

BezuqszeichenlisteReference list

1 Formplatte1 molded plate

2 Formplatte2 molded plate

3 Gasdurchtrittskanal3 gas passage

4 Spülkörper 5 Heißseite4 sink 5 hot side

6 Gasspülstein6 gas purging plug

7 Feuerfestmaterial7 refractory material

8 konischer Blechmantel8 conical sheet metal jacket

9 Blechboden 10 Gaszuführungsrohr9 sheet metal base 10 gas supply pipe

11 Unterseite11 bottom

12 Gasverteilungsraum12 gas distribution room

13 gasdurchlässiger Block 13 gas permeable block

Claims

Patentansprüche claims 1. Verfahren zum Eindusen von Gasen in feuerfest ausgekleide¬ te Heißräume oder metallurgische Gefäße unter Verwendung von feuerfesten Gasführungskörpern mit gerichteter Porosi¬ tät, deren Gasführungskanäle im Bereich der Heißseite der Feuerfestauskleidung münden, d a d u r c h g e k e n n ¬ z e i c h n e t, daß als Gasführungskörper dünnwandige Feuerfestformplatten (1, 2) mit inneren Gasführungskanälen (3) verwendet werden, die auf schmalen Seiten der Form¬ platten (1, 2) münden, daß die Feuerfestformplatten (1, 2) bei der Zustellung der Feuerfestauskleidung in diese zu¬ einander beabstandet und/oder hintereinander eingesetzt werden und daß die Gasführungskanäle (3) mit einem im Inneren oder auf der Kaltseite der Feuerfestauskleidung ausgebildeten Gaszuführungsraum verbunden werden, der mit unter Druck stehendem Gas beaufschlagt wird.1. Process for the injection of gases into refractory-lined hot rooms or metallurgical vessels using refractory gas guide bodies with directed porosity, the gas guide channels of which open in the area of the hot side of the refractory lining, characterized in that thin-walled refractory shaped plates (1, 2 ) are used with inner gas guide channels (3) which open on narrow sides of the mold plates (1, 2), that the refractory mold plates (1, 2) are spaced apart from one another and / or inserted one after the other when the refractory lining is delivered and that the gas routing channels (3) are connected to a gas supply space which is formed in the interior or on the cold side of the refractory lining and which is acted upon by pressurized gas. 2. Verfahren zur Herstellung von Feuerfestformplatten zum Eindusen von Gasen in feuerfest ausgekleidete Heißräume oder metallurgische Gefäße, d a d u r c h g e k e n n - z e i c h n e t, daß die Formplatten (1, 2) durch Walzen einer plastischen Feuerfestmasse zur Herstellung von Grün¬ lingen gebildet werden, wobei in die Grünlinge beim Walz¬ vorgang flächige Streifen aus einer ausbrennbaren oder ausschmelzbaren, vergleichsweise formstabilen Folie einge- arbeitet werden, welche Streifen zur Bildung der Gasfüh¬ rungskanäle (3) anschließend unter Temperaturbeaufschla¬ gung ausgebrannt oder ausgeschmolzen werden.2. Process for the production of refractory shaped plates for the injection of gases into refractory-lined hot rooms or metallurgical vessels, characterized in that the shaped plates (1, 2) are formed by rolling a plastic refractory mass for the production of green pieces, the green pieces being formed in the Flat strips are burned out of a burn-out or meltable, comparatively dimensionally stable film, which strips are then burned out or melted out under the application of temperature to form the gas guiding channels (3). 3. Verwendung von gemäß Anspruch 2 hergestellten Feuerfest- formplatten (1, 2) zur Herstellung von Gasspülsteinen mit gerichteter Porosität für metallurgische Gefäße.3. Use of refractory molded plates (1, 2) produced according to claim 2 for the production of gas purging stones with directed porosity for metallurgical vessels. 4. Gasspülstein für metallurgische Gefäße, mit einem feuer- festen Formstein, einer gasdichten Blechumkleidung, beste¬ hend aus einem den seitlichen Umfangsbereich des Form¬ steins umgebenden Blechmantel sowie einem Blechboden auf der der Schmelze abgewandten Kaltseite des Formsteines und einem an den Blechboden angeschlossenen Gaszuführungsrohr, wobei im Formsteininneren Gasführungskanäle zur Bildung einer gerichteten Porosität vorgesehen sind, die auf der Heißseite münden, d a d u r c h g e k e n n z e i c h ¬ n e t, daß die Gasführungskanäle (3) einen im Formstein- inneren angeordneten Spülkörper (4) durchziehen, der aus feuerfesten Formplatten (1, 2) gasdicht zusammengefügt ist, die gemäß Anspruch 2 hergestellt sind.4. Gas purging plug for metallurgical vessels, with a fire solid molded block, a gas-tight sheet metal cladding, consisting of a sheet metal jacket surrounding the lateral circumferential area of the molded block and a sheet metal base on the cold side of the molded block facing away from the melt and a gas supply pipe connected to the sheet metal base, gas guide channels being provided in the molded block interior to form a directed porosity are, which open on the hot side, characterized in that the gas guide channels (3) pass through a rinsing body (4) arranged in the interior of the molded block, which is gas-tightly assembled from refractory molded plates (1, 2) which are produced according to claim 2. 5. Gasspülstein nach Anspruch 4, d a d u r c h g e - k e n n z e i c h n e t, daß der Spülkörper (4) oberhalb eines aus gasdurchlässigem, feuerfestem Material mit unge- richteter Porosität bestehenden Block (13) angeordnet ist.5. Gas purging plug according to claim 4, so that the purging body (4) is arranged above a block (13) consisting of gas-permeable, refractory material with undirected porosity. 6. Gasspülstein nach Anspruch 4 oder 5, d a d u r c h g e - k e n n z e i c h n e t, daß zwischen der Unterseite (11) des feuerfesten Materials (7) und dem Blechboden (9) ein Gasverteilungsraum (12) vorgesehen ist.6. Gas purging plug according to claim 4 or 5, d a d u r c h g e - k e n n z e i c h n e t that a gas distribution space (12) is provided between the underside (11) of the refractory material (7) and the sheet metal base (9). 7. Gasspülstein nach einem der Ansprüche 4 bis 6, d a - d u r c h g e k e n n z e i c h n e t, daß die Form¬ platten (1, 2) durch Walzen oder Pressen der Grünlinge zur Bildung des Spülkörpers (4) miteinander verbunden sind. 7. Gas purging plug according to one of claims 4 to 6, since - characterized in that the Form¬ plates (1, 2) are connected to each other by rolling or pressing the green bodies to form the washing body (4). 8. Gasspülstein nach einem der Ansprüche 4 bis 6, d a ¬ d u r c h g e k e n n z e i c h n e t, daß die Form¬ platten (1, 2) durch Verkleben mit einem Feuerfestkleber miteinander verbunden sind.8. gas purging plug according to one of claims 4 to 6, that a ¬ d u r c h g e k e n n z e i c h n e t that the Form¬ plates (1, 2) are connected by gluing with a refractory adhesive. 9. Gasspülstein nach einem der Ansprüche 4 bis 8, d a ¬ d u r c h g e k e n n z e i c h n e t, daß die Form¬ platten (1, 2) eine Dicke zwischen 1 und 10 mm und eine Breite zwischen 10 und 100 mm aufweisen. 9. gas purging plug according to one of claims 4 to 8, d a ¬ d u r c h g e k e n n z e i c h n e t that the Form¬ plates (1, 2) have a thickness between 1 and 10 mm and a width between 10 and 100 mm.
PCT/DE1996/002149 1995-11-14 1996-11-12 Fireproof moulding plates with gas ducts Ceased WO1997018335A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AU18668/97A AU1866897A (en) 1995-11-14 1996-11-12 Fireproof moulding plates with gas ducts
BR9611717A BR9611717A (en) 1995-11-14 1996-11-12 Non-combustible profiled plates with gas conducting channels
IL12446396A IL124463A0 (en) 1995-11-14 1996-11-12 Fireproof moulding plates with gas ducts
KR1019980703579A KR19990067556A (en) 1995-11-14 1996-11-12 Refractory plate with gas conduit
EP96945982A EP0862506A2 (en) 1995-11-14 1996-11-12 Fireproof moulding plates with gas ducts
JP9518501A JP2000500527A (en) 1995-11-14 1996-11-12 Fireproof molded plate with gas duct

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19542446A DE19542446C2 (en) 1995-11-14 1995-11-14 Fireproof molded panels with gas routing channels
DE19542446.8 1995-11-14

Publications (2)

Publication Number Publication Date
WO1997018335A2 true WO1997018335A2 (en) 1997-05-22
WO1997018335A3 WO1997018335A3 (en) 1997-08-28

Family

ID=7777438

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1996/002149 Ceased WO1997018335A2 (en) 1995-11-14 1996-11-12 Fireproof moulding plates with gas ducts

Country Status (12)

Country Link
EP (1) EP0862506A2 (en)
JP (1) JP2000500527A (en)
KR (1) KR19990067556A (en)
CN (1) CN1202122A (en)
AU (1) AU1866897A (en)
BR (1) BR9611717A (en)
CA (1) CA2237628A1 (en)
DE (1) DE19542446C2 (en)
IL (1) IL124463A0 (en)
MX (1) MX9803850A (en)
TR (1) TR199800852T2 (en)
WO (1) WO1997018335A2 (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
US6583247B1 (en) 1999-03-16 2003-06-24 Infineum International Ltd. Process for producing free radical polymerized copolymers
RU2847897C1 (en) * 2025-02-17 2025-10-15 Акционерное общество "Ферро Балт Плюс" Device for bottom blowing of liquid metal with gas in a ladle

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DE19954918C2 (en) * 1999-11-16 2001-09-20 Veitsch Radex Gmbh Wien Refractory ceramic gas purging plug
DE102006031687B4 (en) * 2006-07-08 2008-08-14 Refractory Intellectual Property Gmbh & Co. Kg element
DE102013107311A1 (en) * 2013-07-10 2015-01-15 Thyssenkrupp Industrial Solutions Ag Process and device for the aftertreatment of the C-containing bottom product obtained during the gasification
PL2893992T3 (en) * 2014-01-09 2016-06-30 Refractory Intellectual Property Gmbh & Co Kg Gas flushing element and associated gas connection element
CN104120281A (en) * 2014-08-06 2014-10-29 辽宁伊菲科技股份有限公司 Degassing device inlaid at bottom of casting ladle or in holding furnace
CN109735679B (en) * 2018-12-29 2023-06-20 甘肃酒钢集团宏兴钢铁股份有限公司 Device and method for replacing converter bottom blowing bricks and repairing gaps

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FR2516938B1 (en) * 1981-11-23 1986-06-06 Usinor DEVICE FOR INTRODUCING GAS INTO THE LIQUID METAL BATH
LU85131A1 (en) * 1983-12-12 1985-09-12 Arbed GAS-PERMEABLE CONSTRUCTION BODY MADE OF FIRE-RESISTANT MATERIAL
NL8600608A (en) * 1986-03-10 1987-10-01 Hoogovens Groep Bv CONVERTER FOR PREPARING STEEL.
JPH0731151B2 (en) * 1987-10-14 1995-04-10 トヨタ自動車株式会社 Method for manufacturing laminated ceramic structure having voids
DE4133712C2 (en) * 1991-10-11 1994-06-30 Dyko Industriekeramik Gmbh Process for producing a composite material from at least two layers
DE4207881C1 (en) * 1992-03-12 1993-08-26 Veitscher Magnesitwerke-Actien-Gesellschaft, Wien, At Gas flushing brick for melting vessels - has gas channels slightly inclined to vertical to ensure that gas flow is towards centre of vessel despite non-vertical fitting of brick inside vessel bottom
US5423521A (en) * 1992-05-19 1995-06-13 Quigley Company, Inc. Ceramic plug gas distribution device
DE4419811C1 (en) * 1994-06-07 1995-04-27 Plibrico Gmbh Gas bubble brick with wear indicator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6583247B1 (en) 1999-03-16 2003-06-24 Infineum International Ltd. Process for producing free radical polymerized copolymers
RU2847897C1 (en) * 2025-02-17 2025-10-15 Акционерное общество "Ферро Балт Плюс" Device for bottom blowing of liquid metal with gas in a ladle

Also Published As

Publication number Publication date
JP2000500527A (en) 2000-01-18
KR19990067556A (en) 1999-08-25
IL124463A0 (en) 1998-12-06
WO1997018335A3 (en) 1997-08-28
CN1202122A (en) 1998-12-16
BR9611717A (en) 1999-06-29
CA2237628A1 (en) 1997-05-22
EP0862506A2 (en) 1998-09-09
MX9803850A (en) 1998-09-30
DE19542446C2 (en) 1998-05-28
TR199800852T2 (en) 1998-07-21
AU1866897A (en) 1997-06-05
DE19542446A1 (en) 1997-05-15

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