EP0112769B1 - Holder for a tuyère made of refractory material, and process for preventing wear during use - Google Patents

Holder for a tuyère made of refractory material, and process for preventing wear during use Download PDF

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Publication number
EP0112769B1
EP0112769B1 EP83402453A EP83402453A EP0112769B1 EP 0112769 B1 EP0112769 B1 EP 0112769B1 EP 83402453 A EP83402453 A EP 83402453A EP 83402453 A EP83402453 A EP 83402453A EP 0112769 B1 EP0112769 B1 EP 0112769B1
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EP
European Patent Office
Prior art keywords
refractory
liquid
tuyere
source
liquid metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83402453A
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German (de)
French (fr)
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EP0112769A3 (en
EP0112769A2 (en
Inventor
Eric Lienaux
Hugues Zanetta
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Institut de Recherches de la Siderurgie Francaise IRSID
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Institut de Recherches de la Siderurgie Francaise IRSID
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Priority to AT83402453T priority Critical patent/ATE27308T1/en
Publication of EP0112769A2 publication Critical patent/EP0112769A2/en
Publication of EP0112769A3 publication Critical patent/EP0112769A3/en
Application granted granted Critical
Publication of EP0112769B1 publication Critical patent/EP0112769B1/en
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor
    • 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
    • C21C5/35—Blowing from above and 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
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ

Definitions

  • the invention relates to a refractory nozzle-holder element for a container for processing a liquid metal, of the type comprising a refractory mass surrounding an injection nozzle, said refractory mass being provided with passages connected to a source of pressurized auxiliary fluid and opening into the liquid metal bath.
  • Such an element is known for example from French patent n ° 1 347 014.
  • said passages are preferably made by the refractory mass made porous for this purpose or, by fine channels artificially formed in a compact refractory mass. From the technological point of view, this has the double disadvantage of reserving the device for the passage of an auxiliary fluid in the gaseous state (because too much resistance would oppose the pessage of a liquid), and on the other hand, d '' be of a delicate manufacture (in particular for the realization of fine artificial channels). In addition, experience shows that the results obtained are not fully satisfactory and that the field of application remains limited.
  • the object of the invention is to propose an element free from the above-mentioned drawbacks, easy to produce, and allowing effective protection of the refractories surrounding the converter nozzles.
  • the refractory element is constituted by an assembly of several compact refractory sub-elements separated by thin slots performing the role of said passages and connected to a source of liquid carbonaceous agent or gaseous likely to provide, by impregnation of the upper layers of the refractory element, protective carbon.
  • the assembly of sub-elements can advantageously be surrounded by a sheet metal envelope and be kept away from a bottom plate so as to form a distribution space for the carbon-containing agent, which is preferably a hydrocarbon, and, advantageously liquid fuel.
  • the carbon-containing agent which is preferably a hydrocarbon, and, advantageously liquid fuel.
  • the invention also relates to a method for preventing the wear of refractories from the bottom of a metallurgical container comprising nozzle-holder elements of the type mentioned at the head of this thesis.
  • a liquid or gaseous carbonaceous agent preferably a hydrocarbon such as liquid fuel
  • a hydrocarbon such as liquid fuel
  • one of the determining aspects of the invention resides in the fact that around the nose of the nozzle where the refining oxygen opens out, a fuel diffusion area is created to impregnate carbon with it. surface and upper layers of the refractory.
  • This carbon has a double role of chemical protection against iron oxides (such as FeO) attacking the refractory, and thermomechanical protection by creating a layer endowed with a certain elasticity.
  • iron oxides such as FeO
  • Figure 1 shows a refractory element 1 whose shape is substantially that of a pyramid trunk with a rectangular base tapering slightly upwards.
  • the element may have a base of 150 x 110 mm 2 at the bottom and 142 x 105 mm 2 at the top, for 275 mm in height.
  • Element 1 consists of four sub-elements 2, 3, 4, 5 juxtaposed, formed by plates of conventional compact refractory material, for example in magnesia. These plates are assembled by a metal casing 6 1.5 mm thick. A narrow slot 17 is maintained between the neighboring plates by means of threaded spacers 7 calibrated (for example 0.1 mm in diameter).
  • the sheet 6 is welded to a bottom plate 8 3 mm thick, the refractory plates 2, 3, 4, 5 are kept separated by shims 9 of calibrated height allowing to reserve a space 10 of 2 mm thickness for example.
  • the oxygen blowing nozzle is housed in a cylindrical recess 12 with a diameter of 22 mm produced between the two central plates 3 and 4.
  • Figure 1 there is mounted in the recess 12 a double nozzle consisting of the central tube 11 for blowing oxygen connected to an oxygen source 14 and the outer tube 13 leaving an annular passage for fuel supplied by a source 15 .
  • the lower space 10 is supplied with fuel by a second source 16 through the bottom plate 8.
  • the fuel is distributed to a pressure of 4 to 5 bars, which feeds the slots 17, and opens with a speed substantially close to zero in the metal, which ensures its diffusion.
  • Bosses 18 of the tube 11 make it possible to maintain the sufficient radial spacing (for example 1 mm) between the tube 11 and the recess 12.
  • the plates 2, 3, 4, 5 can be bare, or, at least partially, buried, for example on their faces delimiting slots 17 in order to facilitate the flow of the fuel or to avoid infiltration of the latter in the mass of the element. Furthermore, the spacers made are not absolutely essential, so that the passage slots 17 can perfectly be obtained by simple juxtaposition of the refractory plates therebetween.
  • the invention is not limited to the use of fuel oil but adapts to any other hydrocarbon agent, preferably liquid, and capable, by impregnating the upper layers of the refractory, of providing it protective carbon.
  • the nozzle is not necessarily placed between two refractory plates but may very well be housed in a recess formed within a plate.
  • the invention is of general application to any treatment of a molten metal in a metallurgical container provided with injectors for blowing a treatment agent below the level of the bath.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

1. A refractory tuyere holding element for a vessel for treating a liquid metal, of the type which comprises a refractory mass surrounding an injection tuyere, said refractory mass being provided with passages connected to a source of pressurized auxiliary protection fluid which opens into the liquid metal bath, characterized in that it consists of a plurality of subelements made of compact refractory material (2, 3, 4, 5) separated by narrow slits performing the role of said passages and connected to a source (16) of liquid or gaseous carbonaceous agent.

Description

L'invention concerne un élément réfractaire porte-tuyère pour récipient de traitement d'un métal liquide, du type comportant une masse réfractaire entourant une tuyère d'injection, ladite masse réfractaire étant dotée de passages reliés à une source de fluide auxiliaire sous pression et débouchant dans le bain de métal liquide.The invention relates to a refractory nozzle-holder element for a container for processing a liquid metal, of the type comprising a refractory mass surrounding an injection nozzle, said refractory mass being provided with passages connected to a source of pressurized auxiliary fluid and opening into the liquid metal bath.

On sait qu'avec les tuyères à oxygène protégées actuelles, c'est l'usure du réfractaire environnant et non plus celle des tuyères qui est le facteur déterminant pour la durée de mise en service des fonds de convertisseurs.It is known that with the current protected oxygen nozzles, it is the wear of the surrounding refractory and no longer that of the nozzles which is the determining factor for the duration of commissioning of the converter bottoms.

Il a déjà été tenté de protéger les fonds de convertisseurs contre les effets thermiques et d'érosion en utilisant des éléments du type précité avec un fluide auxiliaire gazeux de refroidissement qui d'une part abaisse la température dans la zone eutour de l'injecteur, et d'autre part forme un metelas gazeux protégeant la surface de soufflage.It has already been attempted to protect the converter bases against thermal and erosion effects by using elements of the aforementioned type with a gaseous auxiliary cooling fluid which on the one hand lowers the temperature in the area around the injector, and on the other hand forms a gas metelas protecting the blowing surface.

Un tel élément est connu par exemple par le brevet français n° 1 347 014. Dans l'élément décrit par ce brevet, lesdits passages sont réalisés de préférence par la masse réfractaire rendue poreuse à cet effet ou, par des fins canaux ménagés artificiellement dans une masse réfractaire compacte. Au point de vue technologique, ceci présente le double inconvénient de réserver le dispositif au passage d'un fluide auxiliaire à l'état gazeux (car trop de résistance s'opposerait au pessage d'un liquide), et d'autre part, d'être d'une fabrication délicate (notamment pour la réalisation de fins canaux artificiels). En outre,, l'expérience montre que les resultats obtenus ne sont pas pleinement satisfaisants et que le domaine d'application reste limité.Such an element is known for example from French patent n ° 1 347 014. In the element described by this patent, said passages are preferably made by the refractory mass made porous for this purpose or, by fine channels artificially formed in a compact refractory mass. From the technological point of view, this has the double disadvantage of reserving the device for the passage of an auxiliary fluid in the gaseous state (because too much resistance would oppose the pessage of a liquid), and on the other hand, d '' be of a delicate manufacture (in particular for the realization of fine artificial channels). In addition, experience shows that the results obtained are not fully satisfactory and that the field of application remains limited.

L'invention a pour but de proposer un élément exempt des inconvénients précités, facile à réaliser, et permettant une protection efficace des réfractaires environnant les tuyères de convertisseur.The object of the invention is to propose an element free from the above-mentioned drawbacks, easy to produce, and allowing effective protection of the refractories surrounding the converter nozzles.

Ce but est atteint, conformément à l'invention, du fait que l'élément réfractaire est constitué par un assemblage de plusieurs sous-éléments réfractaires compacts séparés par des fentes minces réalisant le rôle desdits passages et reliées à une source d'agent carboné liquide ou gazeux susceptible d'apporter, par imprégnation des couches supérieures de l'élément réfractaire, du carbone protecteur.This object is achieved, in accordance with the invention, because the refractory element is constituted by an assembly of several compact refractory sub-elements separated by thin slots performing the role of said passages and connected to a source of liquid carbonaceous agent or gaseous likely to provide, by impregnation of the upper layers of the refractory element, protective carbon.

L'assemblage de sous-éléments peut être avantageusement ceinturé par une enveloppe de tôle et être maintenu à distance d'une plaque de fond de manière à former un espace de répartition de l'agent carboné, lequel est de préférence un hydrocarbure, et, avantageusement du fuel liquide.The assembly of sub-elements can advantageously be surrounded by a sheet metal envelope and be kept away from a bottom plate so as to form a distribution space for the carbon-containing agent, which is preferably a hydrocarbon, and, advantageously liquid fuel.

L'invention concerne également un procédé de prévention de l'usure des réfractaires du fond d'un récipient métallurgique comportant des éléments porte-tuyère du type mentionné en tête de ce mémoire. Selon le procédé de l'invention, on injecte au travers de fentes minces traversant la masse de réfractaire compact un agent carboné liquide ou gazeux, de préférence un hydrocarbure tel que du fuel liquide, susceptible d'apporter, par imprégnation des couches supéricures de l'élément réfractaire, du carbone protecteur.The invention also relates to a method for preventing the wear of refractories from the bottom of a metallurgical container comprising nozzle-holder elements of the type mentioned at the head of this thesis. According to the method of the invention, a liquid or gaseous carbonaceous agent, preferably a hydrocarbon such as liquid fuel, is injected through thin slits passing through the compact refractory mass, capable of providing, by impregnating the upper layers of the refractory element, protective carbon.

Comme on le comprend, l'un des aspects déterminants de l'invention réside dans le fait que l'on crée autour du nez de la tuyère où débouche l'oxygène d'affinace, une aire de diffusion du fuel pour imprégner de carbone la surface et les couches supérieures du réfractaire.As will be understood, one of the determining aspects of the invention resides in the fact that around the nose of the nozzle where the refining oxygen opens out, a fuel diffusion area is created to impregnate carbon with it. surface and upper layers of the refractory.

Ce carbone a un double rôle de protection chimique contre les oxydes de fer (tel que FeO) agressant le réfractaire, et de protection thermomécanique en créant une couche dotée d'une certaine élasticité.This carbon has a double role of chemical protection against iron oxides (such as FeO) attacking the refractory, and thermomechanical protection by creating a layer endowed with a certain elasticity.

L'invention sera mieux comprise grâce à la description de deux modes de réalisation préférés, en se référant aux dessins annexés sur lesquels :

  • - la figure 1 représente en coupe verticale, et sans respect des proportions réelles, de la partie inférieure d'un premier mode de réalisation de l'invention.
  • - la figure 2 est une coupe verticale d'un second mode de réalisation de l'invention.
  • - la figure 3 est une section horizontale III-lll de la figure 2.
The invention will be better understood from the description of two preferred embodiments, with reference to the accompanying drawings in which:
  • - Figure 1 shows in vertical section, and without respecting the actual proportions, of the lower part of a first embodiment of the invention.
  • - Figure 2 is a vertical section of a second embodiment of the invention.
  • - Figure 3 is a horizontal section III-III of Figure 2.

La figure 1 montre un élément réfractaire 1 dont la forme est sensiblement celle d'un tronc de pyramide à base rectangle se rétrécissant légèrement vers le haut. A titre purement indicatif, l'élément peut avoir une base de 150 x 110 mm2 à la partie inférieure et de 142 x 105 mm2 à la partie supérieure, pour 275 mm de hauteur.Figure 1 shows a refractory element 1 whose shape is substantially that of a pyramid trunk with a rectangular base tapering slightly upwards. For purely indicative purposes, the element may have a base of 150 x 110 mm 2 at the bottom and 142 x 105 mm 2 at the top, for 275 mm in height.

L'élément 1 est constitué de quatre sous-éléments 2, 3, 4, 5 juxtaposés, formés par des plaquettes en matériau réfractaire compact classique, par exemple en magnésie. Ces plaquettes sont assemblées par une enveloppe métallique 6 de 1,5 mm d'épaisseur. Une fente étroite 17 est maintenue entre les plaquettes voisines grâce à des entretoises filiformes 7 calibrées (par exemple de 0,1 mm de diamètre).Element 1 consists of four sub-elements 2, 3, 4, 5 juxtaposed, formed by plates of conventional compact refractory material, for example in magnesia. These plates are assembled by a metal casing 6 1.5 mm thick. A narrow slot 17 is maintained between the neighboring plates by means of threaded spacers 7 calibrated (for example 0.1 mm in diameter).

La tôle 6 est soudée à une plaque de fond 8 de 3 mm d'épaisseur, dont les paquettes réfracraires 2, 3, 4, 5 sont maintenues séparées par des cales 9 de hauteur calibrée permettant de réserver un espace 10 de 2 mm d'épaisseur par exemple.The sheet 6 is welded to a bottom plate 8 3 mm thick, the refractory plates 2, 3, 4, 5 are kept separated by shims 9 of calibrated height allowing to reserve a space 10 of 2 mm thickness for example.

La tuyère de soufflage d'oxygène est logée dans un évidement cylindrique 12 de 22 mm de diamètre réalisé entre les deux plaquettes centrales 3 et 4.The oxygen blowing nozzle is housed in a cylindrical recess 12 with a diameter of 22 mm produced between the two central plates 3 and 4.

Sur la figure 1 on a monté dans l'évidement 12 une tuyère double constituée du tube central 11 de soufflage d'oxygène relié à une source d'oxygène 14 et du tube extérieur 13 laissant un passage annulaire pour du fuel alimenté par une source 15.In Figure 1 there is mounted in the recess 12 a double nozzle consisting of the central tube 11 for blowing oxygen connected to an oxygen source 14 and the outer tube 13 leaving an annular passage for fuel supplied by a source 15 .

L'espace inférieur 10 est alimenté en fuel par une deuxième source 16 au travers de la plaque de fond 8. Dans cet espace se répartit le fuel à une pression de 4 à 5 bars, qui alimente les fentes 17, et débouche avec une vitesse sensiblement voisine de zéro dans le métal, ce qui assure sa diffusion.The lower space 10 is supplied with fuel by a second source 16 through the bottom plate 8. In this space the fuel is distributed to a pressure of 4 to 5 bars, which feeds the slots 17, and opens with a speed substantially close to zero in the metal, which ensures its diffusion.

Dans le mode de réalisation de la figure 2, on met à profit le jeu de montage entre le tube 11 et l'évidement 12 dans lequel il est directement monté, pour lui faire jouer le rôle de l'espace annulaire de la tuyère double. Cet espace annulaire peut alors être alimenté directement parl'espace 10 de répartition de fuel, ce qui supprime la nécessité d'une alimentation indépendante 15.In the embodiment of Figure 2, we take advantage of the mounting clearance between the tube 11 and the recess 12 in which it is directly mounted, to make it play the role of the annular space of the double nozzle. This annular space can then be supplied directly by the fuel distribution space 10, which eliminates the need for an independent supply 15.

Des bossage 18 du tube 11 permettent de maintenir l'écartement radial suffisant (par exemple 1 mm) entre le tube 11 et l'évidement 12.Bosses 18 of the tube 11 make it possible to maintain the sufficient radial spacing (for example 1 mm) between the tube 11 and the recess 12.

Si l'on ne désire pas protéger la tuyère, on peut bourrer le jeu de montage par un produit de jointement adéquat.If you do not want to protect the nozzle, you can stuff the mounting clearance with a suitable sealant.

Les plaquettes 2, 3, 4, 5 peuvent être nues, ou, au moins partiellement, entôlées, par exemple sur leurs faces délimitant des fentes 17 afin de faciliter l'écoulement du fuel ou d'éviter une infiltration de celui-ci dans la masse de l'élément. Par ailleurs, les entretoises d'espacement faites ne sont pas absolument indispensables, de sorte que les fentes de passage 17 peuvent parfaitement être obtenues par simple juxtaposition des plaquettes réfractaires entre elles.The plates 2, 3, 4, 5 can be bare, or, at least partially, buried, for example on their faces delimiting slots 17 in order to facilitate the flow of the fuel or to avoid infiltration of the latter in the mass of the element. Furthermore, the spacers made are not absolutely essential, so that the passage slots 17 can perfectly be obtained by simple juxtaposition of the refractory plates therebetween.

Comme on l'a déjà mentionné, l'invention ne se limite pas à l'utilisation du fuel mais s'accomode de tout autre agent hydrocarboné, de préférence liquide, et susceptible, par imprégnation des couches supérieures du réfractaire, d'y apporter du carbone protecteur.As already mentioned, the invention is not limited to the use of fuel oil but adapts to any other hydrocarbon agent, preferably liquid, and capable, by impregnating the upper layers of the refractory, of providing it protective carbon.

En outre, la tuyère n'est pas nécessairement placée entre deux plaquettes réfractaires mais peut fort bien être logée dans un évidement ménagé au sein même d'une plaquette.In addition, the nozzle is not necessarily placed between two refractory plates but may very well be housed in a recess formed within a plate.

Par ailleurs, l'invention est d'application généralisée à tout traitement d'un métal en fusion dans un récipient métallurgique pourvu d'injecteurs pour l'insufflation d'un agent de traitement sous le niveau du bain.Furthermore, the invention is of general application to any treatment of a molten metal in a metallurgical container provided with injectors for blowing a treatment agent below the level of the bath.

Elle s'applique notamment aux convertisseurs d'aciérie à soufflage d'oxygène par le fond, éventuellement combiné avec un soufflage par le haut au moyen d'une lance émergée débouchant au-dessus du bain.It applies in particular to steel blowing oxygen converters from the bottom, optionally combined with blowing from the top by means of an emerging lance emerging above the bath.

Claims (10)

1. A refractory tuyere holding element for a vessel for treating a liquid metal, of the type which comprises a refractory mass surrounding an injection tuyère, said refractory mass being provided with passages connected to a source of pressurized auxiliary protection fluid which opens into the liquid metal bath, characterized in that it consists of a plurality of subelements made of compact refractory material (2, 3,4, 5) separated by narrow slits performing the role of said passages and connected to a source (16) of liquid or gaseous carbonaceous agent.
2. The element according to claim 1, characterized in that it is connected to a source (16) of hydrocarbon.
3. The element according to claim 2, characterized in that it is connected to a source of liquid fuel.
4. The element according to any of claims 1 to 3, characterized in that the tuyere is mounted between two subelements (3,4).
5. The element according to any of claims 1 to 4, characterized in that the tuyere Is a double tuyere.
6. A method for preventing wear of refractories at the bottom of a vessel for treating a liquid metal, said bottom comprising refractory tuyere holding elements according to claims 1, 4 and 5 in which a tuyère is surrounded by a mass of compact refractory divided so as to leave slits across which a pressurized auxiliary protection fluid is injected which opens into the liquid metal bath, characterized in that a liquid or gaseous carbonaceous agent is injected across the slits crossing the refractory mass.
7. The method according to claim 6, characterized in that liquid fuel is injected.
8. The method according to claim 6 or 7, characterized in that it is employed in a steel converter with oxygen blown through the tuyeres.
9. The method according to claim 8, characterized in that it is employed in a steel converter with oxygen blown through the tuyeres and through an emerging lance.
10. The method according to claim 6 or 7, characterized in that it is employed in a steel converter with oxygen blown through an emerging lance and with a flotation liquid blown through the tuyeres.
EP83402453A 1982-12-24 1983-12-19 Holder for a tuyère made of refractory material, and process for preventing wear during use Expired EP0112769B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83402453T ATE27308T1 (en) 1982-12-24 1983-12-19 NOZZLE HOLDER OF REFRACTORY MATERIAL AND METHODS TO REDUCE ITS WEAR DURING USE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8221764A FR2538410B1 (en) 1982-12-24 1982-12-24 REFRACTORY ELEMENT AND NOZZLE HOLDER AND METHOD FOR PREVENTING REFRACTORY WEAR USING THE SAME
FR8221764 1982-12-24

Publications (3)

Publication Number Publication Date
EP0112769A2 EP0112769A2 (en) 1984-07-04
EP0112769A3 EP0112769A3 (en) 1984-08-01
EP0112769B1 true EP0112769B1 (en) 1987-05-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP83402453A Expired EP0112769B1 (en) 1982-12-24 1983-12-19 Holder for a tuyère made of refractory material, and process for preventing wear during use

Country Status (6)

Country Link
EP (1) EP0112769B1 (en)
JP (1) JPS59133312A (en)
AT (1) ATE27308T1 (en)
CA (1) CA1222870A (en)
DE (1) DE3371650D1 (en)
FR (1) FR2538410B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT391483B (en) * 1986-12-02 1990-10-10 Radex Austria Ag CONTAINER FOR TREATING HIGHLY MELTING MATERIALS, REFRACTORY STONE FOR DELIVERY AND METHOD FOR OPERATING SUCH A CONTAINER
DE3810098C1 (en) * 1988-03-25 1989-03-23 Radex-Heraklith Industriebeteiligungs Ag, Wien, At
DE3907500C1 (en) * 1989-03-08 1990-08-23 Radex-Heraklith Industriebeteiligungs Ag, Wien, At Gas bubble brick with directed porosity and method for its manufacture
IT1231837B (en) * 1989-05-18 1992-01-14 Radex Heraklith REFRACTORY CERAMIC BRICK FOR INSUFFLATION AND PROCEDURE FOR THE INSUFFLATION OF TREATMENT GAS IN A METALLURGICAL CRUCIBLE
US6367487B1 (en) * 1999-08-11 2002-04-09 Diversey Lever, Inc. Anti-etch and cleaning composition for glass bottles

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1138409B (en) * 1954-05-28 1962-10-25 Huettenwerk Oberhausen Ag Blow nozzle for refining metals
BE635868A (en) * 1962-08-07
FR1543169A (en) * 1964-02-06 1900-01-01 Capillary tube nozzle
IT1016281B (en) * 1973-07-27 1977-05-30 Didier Werke Ag IMPROVEMENT IN REFRACTORY FOR GAS MEABLES
FR2455008A1 (en) * 1979-04-25 1980-11-21 Siderurgie Fse Inst Rech REFRACTORY PIECE WITH SELECTIVE AND ORIENTED PERMEABILITY FOR THE INSUFFLATION OF A FLUID
CS241483B2 (en) * 1980-06-25 1986-03-13 Arbed Refractory building body
AU544858B2 (en) * 1981-06-03 1985-06-13 Nippon Kokan Kabushiki Kaisha Gas blowing nozzle

Also Published As

Publication number Publication date
FR2538410B1 (en) 1988-04-29
DE3371650D1 (en) 1987-06-25
FR2538410A1 (en) 1984-06-29
CA1222870A (en) 1987-06-16
ATE27308T1 (en) 1987-06-15
JPS59133312A (en) 1984-07-31
EP0112769A3 (en) 1984-08-01
EP0112769A2 (en) 1984-07-04

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