EP3023173A1 - Attachment device for a cylindrical ceramic hollow body and fireproof ceramic gas purging plug with such an attachment device - Google Patents

Attachment device for a cylindrical ceramic hollow body and fireproof ceramic gas purging plug with such an attachment device Download PDF

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Publication number
EP3023173A1
EP3023173A1 EP14186888.5A EP14186888A EP3023173A1 EP 3023173 A1 EP3023173 A1 EP 3023173A1 EP 14186888 A EP14186888 A EP 14186888A EP 3023173 A1 EP3023173 A1 EP 3023173A1
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EP
European Patent Office
Prior art keywords
fastening device
wall
opening
groove
gas purging
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14186888.5A
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German (de)
French (fr)
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EP3023173B1 (en
EP3023173B9 (en
Inventor
Bojan Zivanovic
Handle Bernhard
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.)
Refractory Intellectual Property GmbH and Co KG
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Refractory Intellectual Property GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority to EP14186888.5A priority Critical patent/EP3023173B9/en
Application filed by Refractory Intellectual Property GmbH and Co KG filed Critical Refractory Intellectual Property GmbH and Co KG
Priority to ES14186888.5T priority patent/ES2685248T3/en
Priority to PL14186888T priority patent/PL3023173T3/en
Priority to PCT/EP2015/067204 priority patent/WO2016050380A1/en
Priority to CN201580011549.3A priority patent/CN106061651B/en
Priority to CA2936581A priority patent/CA2936581C/en
Priority to EA201790203A priority patent/EA034188B1/en
Priority to US15/119,713 priority patent/US10330387B2/en
Priority to AP2017009769A priority patent/AP2017009769A0/en
Priority to JP2016571478A priority patent/JP6235173B2/en
Publication of EP3023173A1 publication Critical patent/EP3023173A1/en
Priority to CL2016002180A priority patent/CL2016002180A1/en
Publication of EP3023173B1 publication Critical patent/EP3023173B1/en
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Publication of EP3023173B9 publication Critical patent/EP3023173B9/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor
    • 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
    • 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
    • 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
    • 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
    • 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
    • C21C2250/00—Specific additives; Means for adding material different from burners or lances
    • C21C2250/08—Porous plug
    • 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
    • F27D2003/167—Introducing a fluid jet or current into the charge the fluid being a neutral gas

Definitions

  • the invention relates to a fastening device for a cylindrical ceramic hollow body, as used for example in refractory ceramic Gas Stausteinen to allow a so-called directed porosity in the gas purging plug.
  • the gas purging plug is installed in the bottom or wall of a metallurgical vessel to treat a molten metal with a gas that is injected into the molten metal via the gas purging plug.
  • a gas purging plug with directed porosity is characterized in that a treatment gas is transported along a defined, usually linear flow path from a first end, the so-called cold end of the gas purging plug, to a second, so-called hot end of the gas purging plug.
  • the hot end is the end that is in contact with the molten metal.
  • the directional porosity can be formed either by slots or bores in a refractory matrix material. This technique is especially for larger Gashuntettin difficult, which is why cylindrical ceramic hollow body (hereinafter also called Spülrschreibchen) have been developed, which are surrounded with a dense refractory matrix material.
  • Spülrschreibchen cylindrical ceramic hollow body
  • These cylindrical ceramic bodies consist of a dense, temperature-resistant ceramic material (for example based on aluminum oxide and / or zirconium dioxide) and have one or more axially extending flow channels (channels for passing the gas).
  • the invention is so far the object of the invention to provide a fastening device of the type mentioned, which allows independent of the treatment gas a secure and defined fixation of the Spülrschreibchen.
  • the sensitive ceramic rinsing tubes (cylindrical hollow bodies) can be pressed reliably and permanently into a fastening device if some design features are taken into account.
  • Spülrschreibchen, opening and groove have a rotationally symmetric geometry.
  • the cross-section (in particular the diameter at round geometries) of the opening in the bottom of the fastening device is equal to or slightly larger than the cross-section (the outer diameter) of the Spülrschreibchens.
  • the inner wall of the groove is in the best case aligned with the outer wall of the opening or forms an upper portion of the opening.
  • the (annular) groove itself may have a rectangular cross section in the radial direction. Nevertheless, due to the conical cross-section of the wall of the annular compact, it becomes possible to deform the inner wall of the groove in the direction of the rinsing tube when the compact is hammered into the groove from above. Due to the rotationally symmetric geometry, the distribution of forces over the circumference is uniform. Voltage peaks are avoided.
  • the annular groove in the bottom can also have an upwardly increasing cross-section towards the open end, viewed in each case in the radial direction of the groove.
  • the inner wall of the groove has a wall thickness which tapers towards the free end.
  • quasi kinematic reversal also an annular compact having a uniform wall thickness can be used, provided that it is greater than the width of the groove in the vertically lower portion.
  • the shape of the compact is to be chosen so that it can dive in the unloaded state over a small distance in the groove (to position groove and compact to each other), before the compact is then pressed in the axial direction of the fastening device further into the groove and the inner wall of the groove, possibly also the outer wall of the groove, deformed.
  • the deformability of the inner wall of the groove ie the wall which delimits the groove in the direction of the bottom opening of the housing) becomes greater when this inner wall has on its inner surface and / or outer surface one or more recesses or recesses, for example in the form of circumferential grooves.
  • the simultaneous deformation of the outer wall of the groove has the advantage that an additional fixation relative to the main body of the fastening device is possible, which is particularly important if the annular groove extends in a discrete (independent) component, which forms an upper portion of the bottom and is arranged largely free of play in the room. "Completely free of play” means that the component can easily be introduced into the room during the production of the fastening device, as soon as it has reached its final position but also retains it.
  • this outer wall of the groove may be formed on its inner surface and / or outer surface (the outer surface is located on the main body) with recesses. as described above for the inner wall.
  • the depression (s) may, for example, have a sawtooth-like profile, which is characterized inter alia in that at least one wall of the depression extends at an angle not equal to 90 ° to the surface of the respective body.
  • the entire discrete component may consist of a plastically deformable under pressure material.
  • the compact itself can be made of a plastically deformable under pressure material.
  • the ceramic material (for example, based on aluminum oxide) of the hollow body usually has a compressive strength in the range 2000 to 3000 MPa.
  • the deformable material of the sealing walls includes, for example, materials based on copper, copper-tin, copper-tin-zinc, copper-zinc, copper-aluminum, copper Lead, copper-nickel, copper-nickel-zinc, aluminum etc. Typical tensile strength values of these materials are below 600MPa, often ⁇ 500Mpa, ⁇ 400MPa or ⁇ 300MPa.
  • the axial length of the attachment of the rinsing tubes in the fastening device can be different, the longer, the better.
  • Several fastening devices can axially behind each other and / or be assembled (placed) at the same axial height next to each other within a refractory matrix material of a gas purging element.
  • the fastening device has a lid which can be fastened to the base body.
  • the lid has a lid opening which is concentric with the opening in the bottom of the body.
  • the flushing tube is thus guided at least at two points which are at a distance from each other, namely in the region of the opening in the lid and in the region of the opening in the bottom of the base body.
  • This guide for the Spülrschreibchen can be optimized if the lid has an extension which projects into the space of the body and this extension comprises an axial continuation of the lid opening. This makes it possible to stabilize the Spülrschreibchen also cover side over a certain axial length.
  • the axially extending extension of the lid is designed so that it lies positively in the body. This creates a kind of "pipe in the pipe fixation".
  • the lid can be bolted to the base body, for example.
  • the thread may extend on the extension and cooperate with an internal thread on the inside of the body, as shown in the following figure.
  • the extension extends to the bottom of the base body (when assembled), a continuous axial guidance is created for the flushing tube.
  • One end of the gas purging tube protrudes into the opening at the bottom (Gas is supplied via this opening, usually from a gas distribution chamber of the gas purging element) and a substantial part of the purging tube protrudes above the fastening device and then passes through the ceramic matrix material of the rinser to the gas outlet end.
  • the fastening device can be easily attached to a metal ceiling of the gas distribution chamber, for example by welding.
  • the fastening devices are guided in corresponding openings of the metal ceiling and then welded there.
  • gas purging device has a Gaszu Glassrohr GZ, which opens into a gas distribution chamber GV at the lower (cold) end of the gas purging plug.
  • the gas distribution chamber GV is bounded by a metal sheet MB.
  • the metal sheet MB has a plurality of openings DB, of which in FIG. 1 four are recognizable.
  • each aperture DB protrudes a lower end 12E of a fastening device 10, as described in more detail below.
  • a cylindrical ceramic hollow body also called Spülrschreibchen SR.
  • Each rinse tube SR is located with a lower end in the region of the openings DB and extends in the axial direction through a matrix material MM of the gas purging plug to its end face ST, wherein the Stirntläche ST rests in the functional state of the gas purging plug against a molten metal MS.
  • a treatment gas is accordingly introduced via the gas supply pipe GZ, then flows through the gas distribution chamber GV and the openings DB in the purge tubes SR before it leaves the purge tubes SR on the end face ST and flows into the molten metal MS.
  • this gas purging plug can be referred to as a gas purging plug with directed porosity, although the matrix material MM is largely gas-tight.
  • FIG. 2 shows a fastening device 10 in cooperation with the metal sheet MB, so the ceiling of the gas distribution chamber GV.
  • the fastening device 10 consists of a base body 12, which defines with its bottom 12B and a peripheral wall 12W a cylindrical space 12R with a corresponding central longitudinal axis M.
  • the bottom 12B has an opening 120, whose longitudinal axis L is aligned with the central longitudinal axis M.
  • a discrete component 14 On the bottom 12B is a discrete component 14, which has a substantially cup shape.
  • the component 14 has a bottom 14B, which rests on the bottom 12B of the base 12 and thus forms an upper portion of the bottom.
  • the component 14 also has an inner wall 14I and an outer wall 14A. Between inner wall 14I and outer wall 14A, a groove 14N is formed, which has a substantially rectangular cross-section in the unloaded state (not shown).
  • An inner surface 14II of the inner wall 141 and an outer surface 14AA of the outer wall 14A of the component 14 are characterized by a plurality of annular grooves 14R which are serrated with each other (in the axial direction LM).
  • the fastening device according to FIG. 2 is shown in a state in which an associated rinse tube SR is already fixed, by means of an annular compact 16.
  • the compact 16 is characterized in that its radial wall cross-section increases from a lower free end 16U upward so that the inner wall 14I of the groove 14N or the component 14 deforms when the pressing body 16 is pressed into the groove 14N.
  • the annular inner wall 14I which delimits the groove 14N on the inside, has deformed radially inwards after impact of the compact 16 and thereby against the outer wall of the Spülrschreibchen SR, namely flat, and this in the fastening device 10 safe and gas-tight fixed.
  • the component 14 is made of brass, while the base body 12 is a steel body. Under the pressure of the compact 14, not only the inner wall 14I of the body 14 has deformed and has become a kind of seal for the purge tube SR; at the same time, the outer wall 14A of the component 14 also became pressed radially outward and thus clamped the component 14 in the base body 12.
  • the stamping (impressing) of the press ram / compact 14 takes place in this embodiment by means of a cover 18 which, while maintaining a head 18K, has an axially extending extension 18V with an external thread 18A which cooperates with a corresponding internal thread 12I of the main body.
  • Head 18K and extension 18V have a through bore 180 which serves to position the purge tube SR without play.
  • the bore 180 thus extends substantially concentrically / in alignment with the opening 120 and to the free space bounded by the inner wall 141.
  • the fixing of the fastening device 10 on the metal sheet MB is carried out either by welding (weld V) in the opening DB or by forming corresponding inner-external thread of the opening DB and outer surface of the lower, tapered end 12E of the body 12th

Abstract

Die Erfindung betrifft eine Befestigungsvorrichtung für einen zylinderförmigen keramischen Hohlkörper, wie er beispielsweise in feuerfesten keramischen Gasspülsteinen benutzt wird, um eine sogenannte gerichtete Porosität im Gasspülstein zu ermöglichen.The invention relates to a fastening device for a cylindrical ceramic hollow body, as used for example in refractory ceramic gas purging bricks, to allow a so-called directed porosity in the gas purging plug.

Description

Die Erfindung betrifft eine Befestigungsvorrichtung für einen zylinderförmigen keramischen Hohlkörper, wie er beispielsweise in feuerfesten keramischen Gasspülsteinen benutzt wird, um eine sogenannte gerichtete Porosität im Gasspülstein zu ermöglichen.The invention relates to a fastening device for a cylindrical ceramic hollow body, as used for example in refractory ceramic Gasspülsteinen to allow a so-called directed porosity in the gas purging plug.

Der Gasspülstein wird im Boden oder der Wand eines metallurgischen Gefäßes eingebaut, um eine Metallschmelze mit einem Gas zu behandeln, das über den Gasspülstein in die Metallschmelze eingedüst wird.The gas purging plug is installed in the bottom or wall of a metallurgical vessel to treat a molten metal with a gas that is injected into the molten metal via the gas purging plug.

Ein Gasspülstein mit gerichteter Porosität zeichnet sich dadurch aus, dass ein Behandlungsgas entlang eines definierten, meist linearen Strömungsweges von einem ersten Ende, dem sogenannten kalten Ende des Gasspülsteins, zu einem zweiten, sogenannten heißen Ende des Gasspülsteins transportiert wird. Das heiße Ende ist das Ende, welches in Kontakt mit der Metallschmelze ist.A gas purging plug with directed porosity is characterized in that a treatment gas is transported along a defined, usually linear flow path from a first end, the so-called cold end of the gas purging plug, to a second, so-called hot end of the gas purging plug. The hot end is the end that is in contact with the molten metal.

Die gerichtete Porosität kann entweder durch Schlitze oder Bohrungen in einem feuerfesten Matrixmaterial ausgebildet werden. Diese Technik ist insbesondere bei größeren Gasspülelementen schwierig, weshalb zylinderförmige keramische Hohlkörper (nachstehend auch Spülröhrchen genannt) entwickelt wurden, die mit einem dichten feuerfesten Matrixmaterial umgeben sind.The directional porosity can be formed either by slots or bores in a refractory matrix material. This technique is especially for larger Gasspülelementen difficult, which is why cylindrical ceramic hollow body (hereinafter also called Spülröhrchen) have been developed, which are surrounded with a dense refractory matrix material.

Diese zylinderförmigen keramischen Körper bestehen aus einem dichten, temperaturbeständigen keramischen Werkstoff (beispielsweise auf Basis Aluminiumoxid und/oder Zirkondioxid) und weisen ein- oder mehrere axial verlaufende Strömungskanäle (Kanäle zum Durchleiten des Gases) auf.These cylindrical ceramic bodies consist of a dense, temperature-resistant ceramic material (for example based on aluminum oxide and / or zirconium dioxide) and have one or more axially extending flow channels (channels for passing the gas).

Diese "Spülröhrchen" müssen präzise und möglichst gasdicht im Gasspülstein befestigt werden. Dazu sind verschiedene Befestigungsvorrichtungen bekannt, in die die Spülröhrchen eingespannt werden. Um eine spielfreie Befestigung (englisch: fixation free of play) zu erreichen werden verformbare Kohlenstoff-Dichtungen verwendet.These "Spülröhrchen" must be attached precisely and gas-tight as possible in the gas purging plug. For this purpose, various fastening devices are known, in which the Spülröhrchen be clamped. In order to achieve a play-free attachment (fixation free of play) deformable carbon gaskets are used.

Diese Kohlenstoff-Dichtungen haben jedoch den Nachteil, dass sie zerstört werden (verbrennen), wenn sie bei den hohen Anwendungstemperaturen mit einem sauerstoffhaltigen Gas in Berührung kommen.However, these carbon seals have the disadvantage of being destroyed (burnt) when in contact with an oxygen-containing gas at the high temperatures of use.

Der Erfindung liegt insoweit die Aufgabe zugrunde, eine Befestigungsvorrichtung der genannten Art anzubieten, die unabhängig vom Behandlungsgas eine sichere und definierte Fixierung der Spülröhrchen erlaubt.The invention is so far the object of the invention to provide a fastening device of the type mentioned, which allows independent of the treatment gas a secure and defined fixation of the Spülröhrchen.

Bei der Suche nach einer Lösung für dieses Problem wurden folgende Überlegungen angestellt:

  • die Befestigung als solche innerhalb des Gasspülsteins und insbesondere innerhalb des feuerfesten Matrixmaterials muss fest und definiert sein,
  • die Fixierung der Spülröhrchen innerhalb der Befestigungsvorrichtung muss berücksichtigen, dass die Spülröhrchen spröde keramische Körper sind, die sich nicht verformen lassen,
  • die Materialien für die Befestigungsvorrichtung müssen zwar nicht hochtemperaturbeständig sein, da die Befestigungsvorrichtung am sogenannten kalten Ende des Gasspülsteins eingebaut wird; gleichwohl müssen die verwendeten Werkstoffe auch bei Temperaturen von einigen hundert Grad Celsius, die dort herrschen können, ihre Funktion erfüllen,
  • bei Gasspülsteinen mit gerichteter Porosität ist es üblich, das Gas über eine sogenannte Gasverteilkammer auf die einzelnen Spülröhrchen/Spülkanäle zu verteilen, um die Gaszuführung zu vereinfachen. Insoweit muss daran gedacht werden, dass die Befestigungsvorrichtung zuverlässig an oder in der Gasverteilkammer anschließbar ist.
When looking for a solution to this problem, the following considerations were made:
  • the attachment as such within the gas purging plug, and in particular within the refractory matrix material, must be firm and defined,
  • the fixation of the irrigation tubes within the fixture must take into account that the irrigation tubes are brittle ceramic bodies that can not be deformed,
  • Although the materials for the fastening device must not be high temperature resistant, since the fastening device is installed at the so-called cold end of the gas purging plug; however, the materials used must fulfill their function even at temperatures of a few hundred degrees Celsius, which can prevail there,
  • In the case of gas purging pits with directed porosity, it is customary to distribute the gas over a so-called gas distribution chamber to the individual purging tubes / purging channels in order to simplify the gas supply. In that regard, it must be remembered that the fastening device can be reliably connected to or in the gas distribution chamber.

Überraschend wurde gefunden, dass die empfindlichen keramischen Spülröhrchen (zylinderförmige Hohlkörper) sicher und dauerhaft in einer Befestigungsvorrichtung verpresst werden können, wenn dabei einige konstruktive Merkmale berücksichtigt werden.Surprisingly, it has been found that the sensitive ceramic rinsing tubes (cylindrical hollow bodies) can be pressed reliably and permanently into a fastening device if some design features are taken into account.

In ihrer allgemeinsten Ausführungsform betrifft die Erfindung danach eine Befestigungsvorrichtung für einen zylinderförmigen keramischen Hohlkörper mit folgenden Merkmalen in seiner Funktionsposition:

  1. a) einem Grundkörper, der mit seinem Boden und einer umlaufenden Wand einen zylinderförmigen Raum mit einer korrespondierenden Mittenlängsachse (M) definiert,
  2. b) der Boden weist eine Öffnung auf, deren Längsachse (L) mit der Mittenlängsachse (M) fluchtet,
  3. c) der Boden weist eine ringförmige Nut auf, die sich konzentrisch um die Öffnung herum erstreckt,
  4. d) zumindest die der Öffnung benachbarte Innenwand der Nut besteht aus einem unter Druck plastisch verformbaren Material,
  5. e) einem ringförmigen Presskörper, dessen radialer Wandquerschnitt sich von einem unteren freien Ende nach oben hin vergrößert, so dass die Innenwand der Nut, nachdem der Presskörper in die Nut gepresst wurde, sich plastisch verformt und den Querschnitt der Öffnung verkleinert.
In its most general embodiment, the invention then relates to a fastening device for a cylindrical ceramic hollow body with the following features in its functional position:
  1. a) a base body defining with its bottom and a peripheral wall a cylindrical space with a corresponding central longitudinal axis (M),
  2. b) the bottom has an opening whose longitudinal axis (L) is aligned with the central longitudinal axis (M),
  3. c) the bottom has an annular groove concentrically extending around the opening,
  4. d) at least the inner wall of the groove adjacent to the opening consists of a material which can be plastically deformed under pressure,
  5. e) an annular compact whose radial wall cross-section increases from a lower free end upwardly so that the inner wall of the groove after the compact has been pressed into the groove deforms plastically and reduces the cross section of the opening.

Indem die Innenwand nach innen (in den Öffnungsquerschnitt hinein) beim Einsetzen des Presskörpers verformt wird entsteht gleichzeitig die gewünschte Fixierung des zylinderförmigen keramischen Körpers (des Spülröhrchens), welches zuvor in die Befestigungsvorrichtung, einschließlich der genannten Öffnung, eingesetzt wurde.By deforming the inner wall inwardly (in the opening cross-section) upon insertion of the compact, the desired fixation of the cylindrical ceramic body (of the rinsing tube), which has been previously inserted into the fastening device, including the said opening, arises at the same time.

Überraschend hat sich gezeigt, dass die flächige Verformung des Innenwand der Nut mehrere Aufgaben gleichzeitig erfüllt, nämlich:

  • eine Fixierung des Spülröhrchens,
  • eine Positionierung des Spülröhrchens,
  • eine Abdichtung zwischen Spülröhrchen und Befestigungsvorrichtung
  • einen Schutz vor Korrosion, sofern das plastisch verformbare Material der Nutwand aus einer Gruppe ausgewählt wird, die auch unter Zufuhr von Sauerstoff nicht abbrennt.
Surprisingly, it has been shown that the surface deformation of the inner wall of the groove fulfills several tasks simultaneously, namely:
  • a fixation of the Spülröhrchens,
  • a positioning of the Spülröhrchens,
  • a seal between Spülröhrchen and fastening device
  • a protection against corrosion, provided that the plastically deformable material of the groove wall is selected from a group that does not burn even with the supply of oxygen.

Im Sinne einer bestmöglichen Positionierung, Fixierung und Abdichtung der Spülröhrchen in der Befestigungsvorrichtung ist es vorteilhaft, wenn Spülröhrchen, Öffnung und Nut eine rotationssymmetrische Geometrie aufweisen.In terms of the best possible positioning, fixation and sealing of the Spülröhrchen in the fastening device, it is advantageous if Spülröhrchen, opening and groove have a rotationally symmetric geometry.

Der Querschnitt (insbesondere der Durchmesser bei runden Geometrien) der Öffnung im Boden der Befestigungsvorrichtung ist dabei gleich oder geringfügig größer als der Querschnitt (der Außendurchmesser) des Spülröhrchens. Dies gilt analog für den Innenquerschnitt (Innendurchmesser) der Innenwand der Nut. Mit anderen Worten: Die innere Wand der Nut verläuft im besten Fall fluchtend zur äußeren Wand der Öffnung beziehungsweise bildet einen oberen Abschnitt der Öffnung. Dadurch wie die axiale Länge der Öffnung vergrößert, wodurch das in der Öffnung platzierte Spülröhrchen besser geführt und fixiert werden kann.The cross-section (in particular the diameter at round geometries) of the opening in the bottom of the fastening device is equal to or slightly larger than the cross-section (the outer diameter) of the Spülröhrchens. This applies analogously to the inner cross section (inner diameter) of the inner wall of the groove. In other words, the inner wall of the groove is in the best case aligned with the outer wall of the opening or forms an upper portion of the opening. As a result, as the axial length of the opening increases, whereby the rinsing tube placed in the opening can be better guided and fixed.

Die (ringförmige) Nut selber kann in Radialrichtung einen rechteckigen Querschnitt aufweisen. Durch den konischen Querschnitt der Wand des ringförmigen Presskörpers wird es trotzdem möglich, die Innenwand der Nut in Richtung auf das Spülröhrchen zu verformen, wenn der Presskörper von oben in die Nut eingeschlagen wird. Aufgrund der rotationssymmetrischen Geometrie ist die Kräfteverteilung über den Umfang gleichmäßig. Spannungsspitzen werden vermieden.The (annular) groove itself may have a rectangular cross section in the radial direction. Nevertheless, due to the conical cross-section of the wall of the annular compact, it becomes possible to deform the inner wall of the groove in the direction of the rinsing tube when the compact is hammered into the groove from above. Due to the rotationally symmetric geometry, the distribution of forces over the circumference is uniform. Voltage peaks are avoided.

Ebenso kann aber auch die ringförmige Nut im Boden einen nach oben, zum offenen Ende hin größer werdenden Querschnitt aufweisen, jeweils in Radialrichtung der Nut betrachtet. Mit anderen Worten: Die Innenwand der Nut weist eine Wandstärke auf, die sich zum freien Ende hin verjüngt. In diesem Fall kann quasi in kinematischer Umkehr - auch ein ringförmiger Presskörper mit gleichmäßiger Wandstärke verwendet werden, sofern diese größer ist als die Breite der Nut im vertikal unteren Abschnitt.Likewise, however, the annular groove in the bottom can also have an upwardly increasing cross-section towards the open end, viewed in each case in the radial direction of the groove. In other words, the inner wall of the groove has a wall thickness which tapers towards the free end. In this case, quasi kinematic reversal - also an annular compact having a uniform wall thickness can be used, provided that it is greater than the width of the groove in the vertically lower portion.

In allen Fällen ist die Form des Presskörpers so zu wählen, dass er im unbelasteten Zustand über eine kleine Strecke in die Nut eintauchen kann (um Nut und Presskörper zueinander zu positionieren), bevor der Presskörper dann in Axialrichtung der Befestigungsvorrichtung weiter in die Nut eingepresst wird und die Innenwand der Nut, gegebenenfalls auch die Außenwand der Nut, verformt. Die Verformbarkeit der Innenwand der Nut (also der Wand, die die Nut in Richtung auf die Bodenöffnung des Gehäuses begrenzt), wird größer, wenn diese Innenwand auf ihrer Innenfläche und/oder Außenfläche eine oder mehrere Vertiefungen oder Aussparungen aufweist, beispielsweise in Form von umlaufenden Rillen.In all cases, the shape of the compact is to be chosen so that it can dive in the unloaded state over a small distance in the groove (to position groove and compact to each other), before the compact is then pressed in the axial direction of the fastening device further into the groove and the inner wall of the groove, possibly also the outer wall of the groove, deformed. The deformability of the inner wall of the groove (ie the wall which delimits the groove in the direction of the bottom opening of the housing) becomes greater when this inner wall has on its inner surface and / or outer surface one or more recesses or recesses, for example in the form of circumferential grooves.

Die gleichzeitige Verformung der Außenwand der Nut hat den Vorteil, dass eine zusätzliche Fixierung gegenüber dem Grundkörper der Befestigungsvorrichtung möglich wird, was insbesondere dann wichtig ist, wenn die ringförmige Nut in einem diskreten (eigenständigen) Bauteil verläuft, welches einen oberen Abschnitt des Bodens bildet und weitgehend spielfrei im Raum angeordnet ist. "Weitgehend spielfrei" bedeutet, dass das Bauteil zwar bei der Herstellung der Befestigungsvorrichtung leicht in den Raum eingeführt werden kann, sobald es seine Endposition erreicht hat diese aber auch behält. Auch diese Außenwand der Nut kann auf ihrer Innenfläche und/oder Außenfläche (die Außenfläche liegt am Grundkörper) mit Vertiefungen ausgebildet sein. wie sie vorstehend für die Innenwand beschrieben wurden.The simultaneous deformation of the outer wall of the groove has the advantage that an additional fixation relative to the main body of the fastening device is possible, which is particularly important if the annular groove extends in a discrete (independent) component, which forms an upper portion of the bottom and is arranged largely free of play in the room. "Completely free of play" means that the component can easily be introduced into the room during the production of the fastening device, as soon as it has reached its final position but also retains it. Also, this outer wall of the groove may be formed on its inner surface and / or outer surface (the outer surface is located on the main body) with recesses. as described above for the inner wall.

Aufgrund dieser Vertiefung(en) wird die gewünschte Verformung und damit die Klemm- und Dichtwirkung des Presskörpers im Gegenstück (gegenüber den Wänden der Nut) optimiert.Due to this depression (s) the desired deformation and thus the clamping and sealing effect of the compact in the counterpart (compared to the walls of the groove) is optimized.

Die Vertiefung(en) können beispielsweise ein sägezahnartiges Profil aufweisen, welches unter anderem dadurch gekennzeichnet ist, dass mindestens eine Wand der Vertiefung in einem Winkel ungleich 90° zur Oberfläche des jeweiligen Körpers verläuft.The depression (s) may, for example, have a sawtooth-like profile, which is characterized inter alia in that at least one wall of the depression extends at an angle not equal to 90 ° to the surface of the respective body.

Ein Ausführungsbeispiel dazu ist in einem der folgenden Ausführungsbeispiele dargestellt.An embodiment thereof is shown in one of the following embodiments.

Insoweit kann das gesamte diskrete Bauteil aus einem unter Druck plastisch verformbaren Material bestehen.In that regard, the entire discrete component may consist of a plastically deformable under pressure material.

Auch der Presskörper selbst kann aus einem unter Druck plastisch verformbaren Material hergestellt werden.Also, the compact itself can be made of a plastically deformable under pressure material.

Das plastisch verformbare Material wird wie folgt näher gekennzeichnet:

  • Grundsätzlich kommt jedes Material in Frage, das neben einer ausreichenden Basisfestigkeit eine höhere Verformbarkeit (unter Last) als das keramische Material des Spülröhrchens hat. Grundsätzlich könnte deshalb beispielsweise Roheisen verwendet werden. Eine sinnvolle Auswahl kann über die Festigkeit (in MPa) der Werkstoffe erfolgen. Bei keramischen Werkstoffen wird die Druckfestigkeit gemäß ÖNORM EN 993-5:1998 bestimmt. Bei den verformbaren, insbesondere metallischen Werkstoffen wird die Zugfestigkeit gemäß DIN EN ISO 6892-1:2009 ermittelt.
The plastically deformable material is further characterized as follows:
  • In principle, any material is suitable which, in addition to a sufficient basic strength, has a higher deformability (under load) than the ceramic material of the flushing tube. In principle, therefore, for example, pig iron could be used. A sensible selection can be made about the strength (in MPa) of the materials. For ceramic materials, compressive strength is determined according to ÖNORM EN 993-5: 1998. In the case of deformable, in particular metallic materials, the tensile strength is determined in accordance with DIN EN ISO 6892-1: 2009.

Das keramische Material (zum Beispiel auf Basis Aluminiumoxid) der Hohlkörper hat meist eine Druckfestigkeit im Bereich 2000 bis 3000 MPa. Das verformbare Material der Dichtungswände (insbesondere der Wand auf der Innenseite der Nut oder des gesamten diskreten Bauteils mit Nut) umfasst beispielsweise Werkstoffe auf Basis von Kupfer, Kupfer-Zinn, Kupfer-Zinn-Zink, Kupfer-Zink, Kupfer-Aluminium, Kupfer-Blei, Kupfer-Nickel, Kupfer-Nickel-Zink, Aluminium etc. Typische Zugfestigkeitswerte dieser Werkstoffe liegen unter 600MPa, oft < 500Mpa, <400MPa oder <300MPa.The ceramic material (for example, based on aluminum oxide) of the hollow body usually has a compressive strength in the range 2000 to 3000 MPa. The deformable material of the sealing walls (in particular the wall on the inside of the groove or the entire discrete component with groove) includes, for example, materials based on copper, copper-tin, copper-tin-zinc, copper-zinc, copper-aluminum, copper Lead, copper-nickel, copper-nickel-zinc, aluminum etc. Typical tensile strength values of these materials are below 600MPa, often <500Mpa, <400MPa or <300MPa.

Die axiale Länge der Befestigung der Spülröhrchen in der Befestigungsvorrichtung kann unterschiedlich sein, je länger, umso besser. Mehrere Befestigungsvorrichtungen können axial hintereinander und/oder auf gleicher axialer Höhe nebeneinander innerhalb eines feuerfesten Matrixmaterials eines Gasspülelements konfektioniert (platziert) werden.The axial length of the attachment of the rinsing tubes in the fastening device can be different, the longer, the better. Several fastening devices can axially behind each other and / or be assembled (placed) at the same axial height next to each other within a refractory matrix material of a gas purging element.

Nach einer Ausführungsform weist die Befestigungsvorrichtung einen Deckel auf, der am Grundkörper befestigbar ist. Der Deckel weist eine Deckelöffnung auf, die konzentrisch zur Öffnung im Boden des Grundkörpers verläuft.According to one embodiment, the fastening device has a lid which can be fastened to the base body. The lid has a lid opening which is concentric with the opening in the bottom of the body.

Bei dieser Ausführungsform wird das Spülröhrchen also mindestens an zwei Stellen geführt, die im Abstand zueinander stehen, nämlich im Bereich der Öffnung im Deckel und im Bereich der Öffnung im Boden des Grundkörpers.In this embodiment, the flushing tube is thus guided at least at two points which are at a distance from each other, namely in the region of the opening in the lid and in the region of the opening in the bottom of the base body.

Diese Führung für das Spülröhrchen kann optimiert werden, wenn der Deckel eine Verlängerung aufweist, die in den Raum des Grundkörpers ragt und diese Verlängerung eine axiale Fortsetzung der Deckelöffnung umfasst. Das erlaubt es, das Spülröhrchen auch deckelseitig über eine gewisse axiale Länge zu stabilisieren.This guide for the Spülröhrchen can be optimized if the lid has an extension which projects into the space of the body and this extension comprises an axial continuation of the lid opening. This makes it possible to stabilize the Spülröhrchen also cover side over a certain axial length.

Vorzugsweise ist die axial verlaufende Verlängerung des Deckels so gestaltet, dass sie formschlüssig im Grundkörper liegt. Dabei entsteht eine Art "Rohr im Rohr-Fixierung".Preferably, the axially extending extension of the lid is designed so that it lies positively in the body. This creates a kind of "pipe in the pipe fixation".

Der Deckel kann beispielsweise am Grundkörper verschraubt werden. Das Gewinde kann an der Verlängerung verlaufen und mit einem Innengewinde auf der Innenseite des Grundkörpers zusammenwirken, wie in der folgenden Figur dargestellt.The lid can be bolted to the base body, for example. The thread may extend on the extension and cooperate with an internal thread on the inside of the body, as shown in the following figure.

Reicht die Verlängerung bis zum Boden des Grundkörpers (im montierten Zustand) wird eine durchgehende axiale Führung für das Spülröhrchen geschaffen. Ein Ende des Gasspülröhrchens ragt in die Öffnung am Boden (über diese Öffnung wird Gas, meist von einer Gasverteilkammer des Gasspülelements, zugeführt) und ein wesentlicher Teil des Spülröhrchens ragt oben über die Befestigungsvorrichtung hinaus und verläuft anschließend durch das keramische Matrixmaterial des Spülers bis zum gasauslassseitigen Ende.If the extension extends to the bottom of the base body (when assembled), a continuous axial guidance is created for the flushing tube. One end of the gas purging tube protrudes into the opening at the bottom (Gas is supplied via this opening, usually from a gas distribution chamber of the gas purging element) and a substantial part of the purging tube protrudes above the fastening device and then passes through the ceramic matrix material of the rinser to the gas outlet end.

Für das zugehörige Gasspülelement, welches ebenfalls Gegenstand der Erfindung ist, ergeben sich daraus folgende Merkmale in einer Funktionsposition im Boden eines metallurgischen Gefäßes:

  • der Gasspülstein umfasst eine Gasverteilkammer am unteren Ende,
  • mehrere, im Abstand zueinander angeordnete Befestigungsvorrichtungen der genannten Art sind im Bereich einer Decke der Gasverteilkammer angeordnet, wobei
  • jede Befestigungsvorrichtung einen zylinderförmigen keramischen Hohlkörper hält, der sich jeweils durch ein keramisches Grundmaterial des Gasspülsteins bis zu dessen oberer Stirnfläche erstreckt.
For the associated Gasspülelement, which is also the subject of the invention, the following features result in a functional position in the bottom of a metallurgical vessel:
  • the gas purging plug comprises a gas distribution chamber at the lower end,
  • a plurality of mutually spaced fastening devices of the type mentioned are arranged in the region of a ceiling of the gas distribution chamber, wherein
  • each fastening device holds a cylindrical ceramic hollow body, which extends in each case through a ceramic base material of the gas purging plug to its upper end face.

Wenn der Grundkörper der Befestigungsvorrichtung aus Metall besteht kann die Befestigungsvorrichtung leicht an einer Metalldecke der Gasverteilkammer befestigt werden, beispielsweise durch Schweißen. Dazu werden die Befestigungsvorrichtungen in korrespondierende Durchbrechungen der Metalldecke geführt und anschließend dort verschweißt.If the base body of the fastening device is made of metal, the fastening device can be easily attached to a metal ceiling of the gas distribution chamber, for example by welding. For this purpose, the fastening devices are guided in corresponding openings of the metal ceiling and then welded there.

Wichtig ist, dass über die Öffnungen im Boden der Befestigungsvorrichtungen eine Gaszufuhr von der Gasverteilkammer in die Spülröhrchen möglich ist.It is important that via the openings in the bottom of the fastening devices, a gas supply from the gas distribution chamber is possible in the Spülröhrchen.

Weitere Merkmale der Erfindung ergeben sich aus den Merkmalen der Unteransprüche sowie den sonstigen Anmeldungsunterlagen.Other features of the invention will become apparent from the features of the claims and the other application documents.

Die Erfindung wird nachstehend anhand verschiedener Ausführungsbeispiele näher erläutert.The invention will be explained in more detail below with reference to various embodiments.

Dabei zeigen, jeweils in schematisierter Darstellung,

Figur 1:
einen vertikalen Längsschnitt durch einen Gasspülsteins
Figur 2:
einen vertikalen Längsschnitt durch eine Befestigungsvorrichtung in Verbindung mit einer Gasverteilkammer eines Gasspülsteins.
In each case, in a schematic representation,
FIG. 1:
a vertical longitudinal section through a gas purging plug
FIG. 2:
a vertical longitudinal section through a fastening device in conjunction with a gas distribution chamber of a gas purging plug.

In der nachfolgenden Figurenbeschreibung beziehen sich alle Angaben auf die Montage eines Gasspülsteins im Boden eines metallurgischen Gefäßes wie einer Pfanne (englisch: ladle), bei der ein Behandlungsgas das Gasspülelement in Axialrichtung von unten nach oben durchströmt.In the following description of the figures, all information relates to the installation of a gas purging plug in the bottom of a metallurgical vessel such as a ladle, in which a treatment gas flows through the gas purging element in the axial direction from bottom to top.

Die in Figur 1 dargestellte Gasspüleinrichtung weist ein Gaszuführrohr GZ auf, das in eine Gasverteilkammer GV am unteren (kalten) Ende des Gasspülsteins einmündet.In the FIG. 1 shown gas purging device has a Gaszuführrohr GZ, which opens into a gas distribution chamber GV at the lower (cold) end of the gas purging plug.

Am oberen Ende ist die Gasverteilkammer GV von einem Metallblech MB begrenzt. Das Metallblech MB weist mehrere Durchbrechungen DB auf, von denen in Figur 1 vier erkennbar sind.At the upper end, the gas distribution chamber GV is bounded by a metal sheet MB. The metal sheet MB has a plurality of openings DB, of which in FIG. 1 four are recognizable.

Durch jede Durchbrechung DB ragt ein unteres Ende 12E einer Befestigungsvorrichtung 10. wie sie nachstehend näher beschrieben wird. Durch jede Befestigungsvorrichtung 10 verläuft ein zylinderförmiger keramischer Hohlkörper, auch Spülröhrchen SR genannt. Jedes Spülröhrchen SR liegt mit einem unteren Ende im Bereich der Durchbrechungen DB ein und verläuft in Axialrichtung durch ein Matrixmaterial MM des Gasspülsteins bis zu dessen Stirnfläche ST, wobei die Stirntläche ST im Funktionszustand des Gasspülsteins gegen eine Metallschmelze MS anliegt.Through each aperture DB protrudes a lower end 12E of a fastening device 10, as described in more detail below. Through each fastening device 10 extends a cylindrical ceramic hollow body, also called Spülröhrchen SR. Each rinse tube SR is located with a lower end in the region of the openings DB and extends in the axial direction through a matrix material MM of the gas purging plug to its end face ST, wherein the Stirntläche ST rests in the functional state of the gas purging plug against a molten metal MS.

Ein Behandlungsgas wird entsprechend über das Gaszuführrohr GZ eingeleitet, strömt dann durch die Gasverteilkammer GV und die Durchbrechungen DB in die Spülröhrchen SR, bevor es die Spülröhrchen SR über die Stirnfläche ST verlässt und in die Metallschmelze MS strömt.A treatment gas is accordingly introduced via the gas supply pipe GZ, then flows through the gas distribution chamber GV and the openings DB in the purge tubes SR before it leaves the purge tubes SR on the end face ST and flows into the molten metal MS.

Dadurch, dass das Gas mehr oder weniger in einer Richtung (axial) den Gasspülstein durchströmt kann dieser Gasspülstein als Gasspülstein mit gerichteter Porosität (englisch: directed porosity) bezeichnet werden, obwohl das Matrixmaterial MM weitgehend gasdicht ist.Because the gas flows more or less in one direction (axially) through the gas purging plug, this gas purging plug can be referred to as a gas purging plug with directed porosity, although the matrix material MM is largely gas-tight.

Figur 2 zeigt eine Befestigungsvorrichtung 10 in Zusammenwirken mit dem Metallblech MB, also der Decke der Gasverteilkammer GV. FIG. 2 shows a fastening device 10 in cooperation with the metal sheet MB, so the ceiling of the gas distribution chamber GV.

Die Befestigungsvorrichtung 10 besteht aus einem Grundkörper 12, der mit seinem Boden 12B und einer umlaufenden Wand 12W einen zylinderförmigen Raum 12R mit einer korrespondierenden Mittenlängsachse M definiert.The fastening device 10 consists of a base body 12, which defines with its bottom 12B and a peripheral wall 12W a cylindrical space 12R with a corresponding central longitudinal axis M.

Der Boden 12B weist eine Öffnung 120 auf, deren Längsachse L mit der Mittenlängsachse M fluchtet.The bottom 12B has an opening 120, whose longitudinal axis L is aligned with the central longitudinal axis M.

Auf dem Boden 12B liegt ein diskretes Bauteil 14 auf, welches im Wesentlichen eine Topfform hat. Das Bauteil 14 weist eine Boden 14B auf, der auf dem Boden 12B des Grundkörpers 12 aufliegt und damit einen oberen Abschnitt des Bodens bildet. Das Bauteil 14 weist außerdem eine Innenwand 14I und eine Außenwand 14A auf. Zwischen Innenwand 14I und Außenwand 14A wird eine Nut 14N gebildet, die im unbelasteten Zustand (nicht dargestellt) im Wesentlichen einen Rechteckquerschnitt besitzt.On the bottom 12B is a discrete component 14, which has a substantially cup shape. The component 14 has a bottom 14B, which rests on the bottom 12B of the base 12 and thus forms an upper portion of the bottom. The component 14 also has an inner wall 14I and an outer wall 14A. Between inner wall 14I and outer wall 14A, a groove 14N is formed, which has a substantially rectangular cross-section in the unloaded state (not shown).

Eine Innenflächen 14II der Innenwand 141 und eine Außenfläche 14AA der Außenwand 14A des Bauteils 14 ist durch mehrere ringförmige Rillen 14R gekennzeichnet, die untereinander (in Axialrichtung LM) sägezahnartig verbunden sind.An inner surface 14II of the inner wall 141 and an outer surface 14AA of the outer wall 14A of the component 14 are characterized by a plurality of annular grooves 14R which are serrated with each other (in the axial direction LM).

Die Befestigungsvorrichtung gemäß Figur 2 ist in einem Zustand dargestellt, bei dem ein zugehöriges Spülröhrchen SR bereits fixiert ist, und zwar mithilfe eines ringförmigen Presskörpers 16. Der Presskörper 16 ist dadurch gekennzeichnet, dass sein radialer Wandquerschnitt sich von einem unteren freien Ende 16U nach oben hin vergrößert, sodass die Innenwand 14I der Nut 14N beziehungsweise des Bauteils 14 sich verformt, wenn der Presskörper 16 in die Nut 14N gepresst wird.The fastening device according to FIG. 2 is shown in a state in which an associated rinse tube SR is already fixed, by means of an annular compact 16. The compact 16 is characterized in that its radial wall cross-section increases from a lower free end 16U upward so that the inner wall 14I of the groove 14N or the component 14 deforms when the pressing body 16 is pressed into the groove 14N.

Mit anderen Worten: die ringförmige Innenwand 14I, die die Nut 14N innenseitig begrenzt, hat sich nach Einschlagen des Presskörpers 16 radial nach innen verformt und dabei gegen die Außenwand des Spülröhrchen SR angelegt, und zwar flächig, und dieses in der Befestigungsvorrichtung 10 sicher und gasdicht fixiert.In other words, the annular inner wall 14I, which delimits the groove 14N on the inside, has deformed radially inwards after impact of the compact 16 and thereby against the outer wall of the Spülröhrchen SR, namely flat, and this in the fastening device 10 safe and gas-tight fixed.

Um diese Verformung zu erreichen besteht das Bauteil 14 aus Messing, während der Grundkörper 12 ein Stahlkörper ist. Unter dem Druck des Presskörpers 14 hat sich nicht nur die Innenwand 14I des Körpers 14 verformt und ist quasi zu einer Dichtung für das Spülröhrchen SR geworden; gleichzeitig wurde auch die Außenwand 14A des Bauteils 14 radial nach außen gedrückt und damit das Bauteil 14 im Grundkörper 12 verspannt.In order to achieve this deformation, the component 14 is made of brass, while the base body 12 is a steel body. Under the pressure of the compact 14, not only the inner wall 14I of the body 14 has deformed and has become a kind of seal for the purge tube SR; at the same time, the outer wall 14A of the component 14 also became pressed radially outward and thus clamped the component 14 in the base body 12.

Das Einschlagen (Eindrücken) des Pressstempels/Presskörpers 14 erfolgt bei diesem Ausführungsbeispiel mithilfe eines Deckels 18, der unterhalt eines Kopfes 18K eine axial verlaufende Verlängerung 18V mit einem Außengewinde 18A aufweist, welches mit einem korrespondierenden Innengewinde 12I des Grundkörpers zusammenwirkt.The stamping (impressing) of the press ram / compact 14 takes place in this embodiment by means of a cover 18 which, while maintaining a head 18K, has an axially extending extension 18V with an external thread 18A which cooperates with a corresponding internal thread 12I of the main body.

Kopf 18K und Verlängerung 18V weisen eine durchgehende Bohrung 180 auf, die dazu dient, das Spülröhrchen SR spielfrei zu positionieren. Die Bohrung 180 verläuft also im Wesentlichen konzentrisch/fluchtend zur Öffnung 120 und zu dem Freiraum, der von der Innenwand 141 begrenzt wird..Head 18K and extension 18V have a through bore 180 which serves to position the purge tube SR without play. The bore 180 thus extends substantially concentrically / in alignment with the opening 120 and to the free space bounded by the inner wall 141.

Sobald die untere Stirnfläche 18U des Deckels 16 den Presskörper 14 erreicht hat, wird dieser weiter nach unten in die Nut 14N gedrückt, um die gewünschte Verformung, insbesondere der Innenwand 14I zu erreichen, bis die gewünschte Fixierung des Spülröhrchen SR erreicht ist.As soon as the lower end face 18U of the cover 16 has reached the pressing body 14, it is pushed further down into the groove 14N in order to achieve the desired deformation, in particular the inner wall 14I, until the desired fixation of the flushing tube SR is achieved.

Zwischen dem Deckelkopf 18K und dem korrespondierenden oberen Rand des Grundkörpers 12 wird dann nur noch ein kleiner Spalt S (aus Toleranzgründen) bestehen, wenn der Presskörper 16 maximal in die Nut 14N eingedrückt wurde.Between the lid head 18K and the corresponding upper edge of the main body 12, only a small gap S (for tolerance reasons) will exist if the pressing body 16 has been pressed into the groove 14N to the maximum.

Die Fixierung der Befestigungsvorrichtung 10 am Metallblech MB erfolgt entweder durch Verschweißen (Schweißnaht V) im Bereich der Durchbrechung DB oder durch Ausbildung korrespondierender Innen-Außengewinde von Durchbrechung DB und Außenfläche des unteren, verjüngten Endes 12E des Grundkörpers 12.The fixing of the fastening device 10 on the metal sheet MB is carried out either by welding (weld V) in the opening DB or by forming corresponding inner-external thread of the opening DB and outer surface of the lower, tapered end 12E of the body 12th

Claims (14)

Befestigungsvorrichtung für einen zylinderförmigen keramischen Hohlkörper (SR) mit folgenden Merkmalen in seiner Funktionsposition: a) einem Grundkörper (12), der mit seinem Boden (12B) und einer umlaufenden Wand (12W) einen zylinderförmigen Raum (12R) mit einer korrespondierenden Mittenlängsachse (M) definiert, b) der Boden (12B) weist eine Öffnung (120) auf, deren Längsachse (L) mit der Mittenlängsachse (M) fluchtet, c) der Boden (12B) weist eine ringförmige Nut (14N) auf, die sich konzentrisch um die Öffnung (120) herum erstreckt, d) zumindest die der Öffnung (120) benachbarte Innenwand (14I) der Nut (14N) besteht aus einem unter Druck plastisch verformbaren Material, e) einem ringförmigen Presskörper (16), dessen radialer Wandquerschnitt sich von einem unteren freien Ende (16U) nach oben hin vergrößert, so dass die Innenwand (14I) der Nut (14N), nachdem der Presskörper (16) in die Nut (14N) gepresst wurde, sich plastisch verformt und dabei den Querschnitt der Öffnung (120) verkleinert. Fastening device for a cylindrical ceramic hollow body (SR) with the following features in its functional position: a) a base body (12) defining with its bottom (12B) and a peripheral wall (12W) a cylindrical space (12R) with a corresponding central longitudinal axis (M), b) the bottom (12B) has an opening (120) whose longitudinal axis (L) is aligned with the central longitudinal axis (M), c) the bottom (12B) has an annular groove (14N) concentrically extending around the opening (120), d) at least the inner wall (14I) of the groove (14N) adjacent to the opening (120) consists of a material which can be plastically deformed under pressure, e) an annular compact (16) whose radial wall cross-section increases upward from a lower free end (16U) such that the inner wall (14I) of the groove (14N) after the compact (16) enters the groove (14N ) was pressed, plastically deformed and thereby reduces the cross-section of the opening (120). Befestigungsvorrichtung nach Anspruch 1, bei der die ringförmige Nut (14N) im Boden (12B) in Radialrichtung einen rechteckigen Querschnitt aufweist.A fixing device according to claim 1, wherein said annular groove (14N) in the bottom (12B) has a rectangular cross section in the radial direction. Befestigungsvorrichtung nach Anspruch 1, bei der die ringförmige Nut (14N) im Boden (12B) einen, in Radialrichtung sich nach oben, zum offenen Ende hin vergrößernden Querschnitt aufweist.A fastening device according to claim 1, wherein the annular groove (14N) in the bottom (12B) has a cross-section widening in the radial direction upwards towards the open end. Befestigungsvorrichtung nach Anspruch 1, bei der die ringförmige Nut (14N) in einem diskreten Bauteil (14) verläuft, welches einen oberen Abschnitt des Bodens (12B) bildet und weitgehend spielfrei im Raum (12R) angeordnet ist.Fastening device according to claim 1, wherein the annular groove (14N) in a discrete component (14) which forms an upper portion of the bottom (12B) and is arranged largely free of play in the space (12R). Befestigungsvorrichtung nach Anspruch 4, bei der das diskrete Bauteil (14) aus einem unter Druck plastisch verformbaren Material besteht.Fastening device according to claim 4, wherein the discrete component (14) consists of a plastically deformable under pressure material. Befestigungsvorrichtung nach Anspruch 1, bei der der Presskörper (16) aus einem unter Druck plastisch verformbaren Material besteht.Fastening device according to claim 1, wherein the pressing body (16) consists of a plastically deformable under pressure material. Befestigungsvorrichtung nach Anspruch 1, bei der das plastisch verformbare Material ein Material aus der Gruppe ist, die folgende Materialen umfasst: Kupfer, Kupferlegierung, Aluminium, Aluminiumlegierung, Zinn, Zinnlegierung, Zink, Zinklegierung.Fastening device according to claim 1, wherein the plastically deformable material is a material from the group comprising the following materials: copper, copper alloy, aluminum, aluminum alloy, tin, tin alloy, zinc, zinc alloy. Befestigungsvorrichtung nach Anspruch 1, mit mindestens einer umlaufenden Vertiefung (14R) auf mindestens einer der folgenden Flächen: Innenfläche (14II) der Innenwand (14I), Außenfläche (14AA) der Außenwand (14A).A fastening device according to claim 1, comprising at least one circumferential recess (14R) on at least one of the following surfaces: inner surface (14II) of the inner wall (14I), outer surface (14AA) of the outer wall (14A). Befestigungsvorrichtung nach Anspruch 1, bei der die Vertiefung (14R) ein sägezahnartiges Profil hat.A fastening device according to claim 1, wherein the recess (14R) has a saw-toothed profile. Befestigungsvorrichtung nach Anspruch 1, mit einem Deckel (18), der am Grundkörper (12) befestigbar ist, und eine Deckelöffnung (180) aufweist, die konzentrisch zur Öffnung (12O) im Boden des Grundkörpers (12) verläuft.Fastening device according to claim 1, with a lid (18) which can be fastened to the base body (12), and a lid opening (180) concentric with the opening (12O) in the bottom of the body (12). Befestigungsvorrichtung nach Anspruch 10, bei der der Deckel (18) mit dem Grundkörper (12) verschraubbar ist.Fastening device according to claim 10, wherein the cover (18) with the base body (12) can be screwed. Befestigungsvorrichtung nach Anspruch 10, bei der der Deckel (18) eine in den Raum (12R) formschlüssig einsetzbare Verlängerung (18V) aufweist, die eine axiale Bohrung (18B) aufweist, die konzentrisch zur Deckelöffnung (120) verläuft.Fastening device according to Claim 10, in which the cover (18) has an extension (18V) which can be inserted into the space (12R) in a form-fitting manner and which has an axial bore (18B) concentric with the cover opening (120). Feuerfester keramischer Gasspülstein mit folgenden Merkmalen in einer Funktionsposition im Boden eines metallurgischen Gefäßes: a) einer Gasverteilkammer (GV) am unteren Ende b) mehreren, im Abstand zueinander angeordneten Befestigungsvorrichtungen (10) gemäß Anspruch 1 im Bereich einer Decke (MB) der Gasverteilkammer (GV), wobei c) jede Befestigungsvorrichtung (10) einen zylinderförmigen keramischen Hohlkörper (SR) hält. der sich jeweils durch ein keramisches Grundmaterial (MM) des Gasspülsteins bis zu dessen oberer Stirnfläche erstreckt. Refractory ceramic gas purging plug having the following characteristics in a functional position in the bottom of a metallurgical vessel: a) a gas distribution chamber (GV) at the bottom b) a plurality of, spaced-apart fastening devices (10) according to claim 1 in the region of a ceiling (MB) of the gas distribution chamber (GV), wherein c) each fastening device (10) holds a cylindrical ceramic hollow body (SR). each extending through a ceramic base material (MM) of the gas purging plug to its upper end face. Gasspülstein nach Anspruch 13, bei dem die Decke (MB) der Gasverteilkammer (GV) aus Metall besteht und die Befestigungsvorrichtungen in Durchbrechungen (DB) dieser Decke (MB) durch Schweißen (S) befestigt sind.Gas purging plug according to claim 13, wherein the ceiling (MB) of the gas distribution chamber (GV) consists of metal and the fastening devices in openings (DB) of this ceiling (MB) by welding (S) are attached.
EP14186888.5A 2014-09-29 2014-09-29 Attachment device for a cylindrical ceramic hollow body and fireproof ceramic gas purging plug with such an attachment device Active EP3023173B9 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
ES14186888.5T ES2685248T3 (en) 2014-09-29 2014-09-29 Fixing device for a cylindrical ceramic hollow body and a refractory ceramic gas purge plug with such a fixing device
PL14186888T PL3023173T3 (en) 2014-09-29 2014-09-29 Attachment device for a cylindrical ceramic hollow body and fireproof ceramic gas purging plug with such an attachment device
EP14186888.5A EP3023173B9 (en) 2014-09-29 2014-09-29 Attachment device for a cylindrical ceramic hollow body and fireproof ceramic gas purging plug with such an attachment device
EA201790203A EA034188B1 (en) 2014-09-29 2015-07-28 Securing device for a cylindrical ceramic hollow body and fireproof ceramic gas purging brick having such type of securing device
CN201580011549.3A CN106061651B (en) 2014-09-29 2015-07-28 Brick is purged for the fixing device of the ceramic hollow body of cylinder and the ceramic gas of fire resisting with such fixing device
CA2936581A CA2936581C (en) 2014-09-29 2015-07-28 Securing device for a cylindrical ceramic hollow body and fireproof ceramic gas purging brick having such type of securing device
PCT/EP2015/067204 WO2016050380A1 (en) 2014-09-29 2015-07-28 Securing device for a cylindrical ceramic hollow body and fireproof ceramic gas purging brick having such type of securing device
US15/119,713 US10330387B2 (en) 2014-09-29 2015-07-28 Securing device for a cylindrical ceramic hollow body and fireproof ceramic gas purging brick having such type of securing device
AP2017009769A AP2017009769A0 (en) 2014-09-29 2015-07-28 Securing device for a cylindrical ceramic hollow body and fireproof ceramic gas purging brick having such type of securing device
JP2016571478A JP6235173B2 (en) 2014-09-29 2015-07-28 Fixing device for cylindrical ceramic hollow body and refractory ceramic gas purge brick with such type of fixing device
CL2016002180A CL2016002180A1 (en) 2014-09-29 2016-08-30 Clamping device for a cylindrical ceramic hollow body and refractory ceramic gas purge brick having said clamping device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14186888.5A EP3023173B9 (en) 2014-09-29 2014-09-29 Attachment device for a cylindrical ceramic hollow body and fireproof ceramic gas purging plug with such an attachment device

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EP3023173A1 true EP3023173A1 (en) 2016-05-25
EP3023173B1 EP3023173B1 (en) 2018-06-06
EP3023173B9 EP3023173B9 (en) 2018-12-12

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EP (1) EP3023173B9 (en)
JP (1) JP6235173B2 (en)
CN (1) CN106061651B (en)
AP (1) AP2017009769A0 (en)
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CL (1) CL2016002180A1 (en)
EA (1) EA034188B1 (en)
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US10330387B2 (en) 2019-06-25
CN106061651A (en) 2016-10-26
JP2017506704A (en) 2017-03-09
EA034188B1 (en) 2020-01-15
PL3023173T3 (en) 2018-12-31
JP6235173B2 (en) 2017-11-22
US20170051979A1 (en) 2017-02-23
EA201790203A1 (en) 2017-08-31
EP3023173B1 (en) 2018-06-06
CL2016002180A1 (en) 2017-07-07
CN106061651B (en) 2017-07-21
EP3023173B9 (en) 2018-12-12
CA2936581C (en) 2018-06-26
WO2016050380A1 (en) 2016-04-07
ES2685248T3 (en) 2018-10-08
CA2936581A1 (en) 2016-04-07
AP2017009769A0 (en) 2017-02-28

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