EP0403466B1 - Installation de lavage pour un récipient métallurgique - Google Patents

Installation de lavage pour un récipient métallurgique Download PDF

Info

Publication number
EP0403466B1
EP0403466B1 EP90890176A EP90890176A EP0403466B1 EP 0403466 B1 EP0403466 B1 EP 0403466B1 EP 90890176 A EP90890176 A EP 90890176A EP 90890176 A EP90890176 A EP 90890176A EP 0403466 B1 EP0403466 B1 EP 0403466B1
Authority
EP
European Patent Office
Prior art keywords
pipe
insert
flushing arrangement
arrangement according
working lining
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 - Lifetime
Application number
EP90890176A
Other languages
German (de)
English (en)
Other versions
EP0403466A3 (fr
EP0403466A2 (fr
Inventor
Reinhard Kitzberger
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.)
Primetals Technologies Austria GmbH
Original Assignee
Voest Alpine Industrienlagenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voest Alpine Industrienlagenbau GmbH filed Critical Voest Alpine Industrienlagenbau GmbH
Publication of EP0403466A2 publication Critical patent/EP0403466A2/fr
Publication of EP0403466A3 publication Critical patent/EP0403466A3/fr
Application granted granted Critical
Publication of EP0403466B1 publication Critical patent/EP0403466B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor

Definitions

  • the invention relates to a flushing device for a metallurgical vessel, in particular for a steelworks converter, with a refractory lining that forms a wear lining and with pipes through which flushing gas flows at predetermined locations of the refractory lining, with at least one rod extending centrally in the longitudinal direction of the pipe in each pipe shaped insert is provided which forms an annular gap with the inner tube wall.
  • a stirring effect can be achieved in the molten metal, which compensates for imbalances in composition and temperature, causes the deposition of non-metallic inclusions and promotes a certain degassing of the molten metal.
  • a large number of devices are known for introducing purge gas.
  • the flushing stone which has a sheet metal jacket enclosing a porous refractory mass in order to avoid gas escaping from the side, wherein the porous mass can be provided with a directed porosity, thus replaces a conventional stone of the wear lining of the converter.
  • the sheet metal jacket is open to the converter interior; at the opposite end of the sink, at which the sheet metal jacket is closed, a feed line is connected to the sheet metal jacket in a gas-tight manner.
  • Flushing stones of this type have the disadvantage that they are complicated to manufacture and install, and that an uncontrolled gas passage can occur between the sheet metal casing and the porous, refractory mass contained therein if the refractory mass does not lie completely against the sheet metal jacket. Furthermore, one such Flushing stone leads to wear that is premature compared to the wear lining of the converter, so that material and time-consuming repair measures are required between two readjustments of the wear lining.
  • EP-B-0 064 449 discloses a flushing device in which a plurality of flat-pressed tubes extending from a distributor located outside the vessel are passed through the converter jacket and the permanent lining and are inserted into recesses which are cut into adjacent stones of the wear lining .
  • the flat-pressed tubes ensure that no melt enters the openings of the tubes, solidifies in them and clogs them so that blowing out is no longer possible.
  • the flat-pressed pipes have the disadvantage that due to the small wall thickness and the large width, there is a strong deformation (bulging, undulation) of the pipe. The pipe is then clamped to the wall, the mobility is restricted and the pipe is then torn off during a relative movement between the permanent and wear lining or bursts within the wall.
  • the invention aims to avoid the disadvantages and difficulties that exist in the known flushing devices, and has as its object to create a flushing device of the type described in the introduction, in which the gas jet enters the inside of the vessel as sharply as possible, but nevertheless penetrates the melt the pipes are prevented even at low gas pressure, and in which the lowest possible different operating conditions, in particular with regard to shape, axial mobility and outlet cross section, occur between the refractory lining and the pipes.
  • the present invention provides a flushing device of the type mentioned at the outset, which is characterized in that the insert is formed by a wire and is loose in the part of the tube lying in the wear lining, i.e. is provided without lateral support and is only fixed in position in the axial direction with respect to the tube and that the fixation of the insert has little play in the axial direction with respect to the tube.
  • the insert can move slightly in the axial direction with respect to the pipe, which prevents the pipe from clogging even under extreme operating conditions (e.g. very small amount of purge gas).
  • the insert in the part of the tube lying in the wear lining is loose, i.e. provided without lateral support and is only fixed in position in the axial direction with respect to the tube, the insert is automatically centered in the tube when the gas is passed through the tube, so that there is always an annular gap between the inner tube wall and the insert during gas flushing.
  • the insert is formed by a wire rope and is loose in the part of the tube lying in the wear lining, that is to say is provided without lateral support and is only fixed in position axially with respect to the tube and that the fixation of the insert here is slight compared to the tube Has play in the axial direction.
  • Another embodiment of the flushing device according to the invention is characterized in that the insert designed as an inner tube is loose in the part of the tube lying in the wear lining, i.e. is provided without lateral support and is only fixed in position in the axial direction with respect to the tube and that the fixation of the insert has little play in the axial direction with respect to the tube.
  • the part of the tube lying in the wear lining and the insert used therein or the inserts used therein are radially symmetrical, which results in thermal expansions distributed uniformly over the cross section, so that the stress on the wear lining caused thereby is evenly distributed over the circumference of the tube .
  • An embodiment that is easy to manufacture is characterized in that the tube has a circular cross section.
  • a particularly good fit in recesses cut into stones of the wear lining for receiving the tubes is obtained if the tube has a cross section formed by a regular polygon, preferably a square or hexagonal cross section.
  • the annular gap preferably has a width of between 1 and 3 mm, the inside diameter of the tube expediently between 4 and 12 mm, preferably between 4 and 8 mm, and the The diameter of the insert is between 2 and 8 mm, preferably between 2 and 5 mm.
  • the pipe Since pipes made of steel tend to become embrittled due to carburizing, adequate strength of the pipe is expediently ensured in that the pipe has a wall thickness which corresponds to approximately half the inside diameter of the pipe.
  • the ratio of the length of the pipe lying in the wear lining to the inside diameter of the pipe lying in the wear lining is advantageously at least 16, this ratio not only being present in the case of newly bricked converters, but also at the end of a converter journey, i.e. when the converter has to be bricked up again .
  • Gas supply pipe are connected by lines, the use of each tube being fixed to the gas supply pipe.
  • a further preferred embodiment the production of which is also particularly simple, is characterized in that two tubes, which are arranged at a distance from one another in the wear lining of the metallurgical vessel, are connected by line with their ends lying outside the wear lining to a common gas supply tube, and in that the two Pipes have a common insert, which extends from the mouth of one pipe to the mouth of the other pipe.
  • the insert is expediently fixed in the axial direction on the part of the tube lying outside the wear lining.
  • the insert can be expediently fixed to the tube by means of a support rib.
  • the pipe advantageously has a plurality of inserts.
  • the tube advantageously has a straight tube part which extends at an angle to the part of the tube lying in the wear lining and through which the insert extends.
  • FIG. 1 a longitudinal section through a steelworks converter
  • FIG. 2 a top view of the bottom of the steelworks converter
  • FIG. 3 a section along the line III-III of FIG. 2 according to a first embodiment.
  • FIG. 4 shows an enlarged detail of FIG. 2.
  • Fig. 5 shows a flushing device in side view, partly in section.
  • FIG. 6 illustrates the flushing device shown in FIG. 5 in a plan view, likewise in section.
  • FIG. 7 shows a further embodiment of the flushing device in a representation analogous to FIG. 5.
  • 8 and 9 illustrate a further embodiment of the flushing device in axial section and in cross section according to line IX-IX of FIG. 8.
  • Different cross-sectional shapes of tubes and inserts are shown in FIGS. 10 to 13.
  • the steelwork converter shown in FIG. 1 has a metal outer jacket 1, which is provided with a permanent lining 4 on the inside both on the bottom 2 and on the side walls 3.
  • a wear lining 7 On the permanent lining, which is formed from refractory bricks 5, a wear lining 7, also made from refractory bricks 6, is bricked up.
  • the refractory bricks 6 of the wear lining 7 are arranged in rows 10 starting from the center 8 of the bottom 2 or the longitudinal axis 9 of the converter, rows 10 parallel to one another with longitudinal joints 11 and the bricks 6 being adjacent Rows 10 are arranged offset from one another.
  • the adjacent stones 6 of each row form transverse joints 12 opening into the longitudinal joints 11 between adjacent rows 10 and each abutting a side surface of a stone of an adjacent row 10.
  • Flushing devices 14 are inserted at predetermined points 13 of the base 2, which are preferably provided at approximately the same distance from the center 8 of the base 2 and also at approximately the same distance from one another. According to the embodiment shown in FIGS. 1 to 4, each purging device 14 is formed by a feed pipe 15 for the purging gas which penetrates the metal outer jacket 1 and projects up to a height just below the wear lining 7.
  • two pipes 18, hereinafter referred to as distributor pipes, welded into the jacket 17 of the supply pipe are arranged with a circular cross section, which extend from the end 16 of the supply pipe 15 in the direction of the converter interior 19 diverge, etc. in the form of a fork-shaped U-shaped bend part 20.
  • These bend parts 20 of the distributor pipes 18 are located in the permanent lining 4 just below the wear lining 7.
  • the bend parts 20 merge into straight-line pipe parts 21 with a circular cross-section, the distance 22 of which is approximately the thickness 23 of a stone 6 the wear lining 7 corresponds.
  • a 6 'of the stones 6 of the wear chuck 7 has recesses 24 which are formed at the corners and which correspond to the cross section of the tube parts 21 and which accommodate the tube parts 21.
  • the space between the tube parts 21 and the stone 6 ' is filled with refractory mass 25.
  • Inserts 26 formed by a wire are provided, which extend over the entire length of the distributor pipes 18 and protrude into the feed pipe 15.
  • the ends 27 of the inserts 26 protruding into the feed pipe 15 are bent at right angles and fastened to a plate 28 which closes the feed pipe 15 at the end, for example by welding.
  • the inserts 26 are fixed in the axial direction with respect to the distributor pipes 18.
  • the inserts are opposite the distributor pipes 18, etc. whose straight tube parts 21, which pass through the wear lining 7, are freely movable, which mobility results from deformation in the elastic region of the inserts 26.
  • the inserts 26 When gas flows, the inserts 26 self-center with respect to the inner wall 29 of the distributor pipes 18, so that an annular gap 30 of uniform width is formed between each insert 26 and the inner wall 29 of the distributor pipe 18.
  • the inside diameter of the distributor pipes is 6 mm, the diameter of the insert is 3 mm.
  • the distributor pipes between the feed pipe 15 and their curved part 20 still have a straight piece 31, as a result of which there is a certain radial mobility of the insert 26 with respect to this straight piece 31.
  • This radial mobility results in the straight tube part 21, which extends approximately at right angles to the straight piece 31, a slight axial mobility of the insert 26 relative to the tube part 21, whereby a relocation of the annular gap 30 at the free end of the tube parts 21 reliably is prevented, etc. even if only very small amounts of gas are blown into the converter interior through the distributor pipes 18.
  • the radially symmetrical design of the annular gap 30 allows the kinetic energy of the gas jet to be introduced into the melt in a highly concentrated manner, as a result of which the gas jet can be influenced only slightly.
  • the growth of the annular gap 30 is also largely prevented by this.
  • a relative movement between the permanent chuck 4 and the wear chuck 7 can be easily absorbed by the straight-line piece 31 of the distributor pipes 18 branching off from the feed pipe 15, so that the distributor pipes 18 are prevented from tearing off.
  • This straight-line piece 31 is advantageously wrapped with a soft or evaporating material, as a result of which a free space for accommodating the resulting relative movements between permanent 4 and wear lining 7 is formed.
  • the insert 26 is also bent in a U-shape and, in the case of fork-shaped distributor pipes 18, extends from the mouth of one distributor pipe 18 via the junction of the feed pipe 15 to the mouth of the opposite second pipe 18.
  • the insert is thereby 26 fixed so far in the axial direction that it cannot be pushed out of the distributor pipes.
  • the rinsing element is designed as a single element, ie as a single tube 18 ', which is linear from the outside through the metal outer jacket 1 and entire refractory lining of the steel mill converter is guided.
  • the insert 26 ' is fixed with respect to the tube 18' via two radially symmetrical ribs 32, 33.
  • One of the ribs is only fixed to the tube 18 'by welding and serves as a guide for the insert 26'.
  • the second opposite rib 33 is fixed to both the tube 18 'and the insert 26 by welding.
  • a square tube cross-sectional shape can prove to be particularly favorable if square recesses are cut in the stones 6 'of the wear lining 7, so that one can get by almost without a refractory mass when fixing the distributor pipe 18 or 18' in the wear lining 7.
  • the insert 26 is formed by a multi-strand wire rope 34.
  • the purging device enables purging gas to be supplied in a precisely predetermined amount per unit of time as a result of the safe prevention of an overgrowth of the mouth, as a result of which very precise regulation of the purging gas quantity supplied is possible.
  • a particular advantage of the flushing device according to the invention can be seen in the fact that the control can be simplified insofar as a plurality of flushing devices can be actuated with a control element acting in common and not, and so far, each flushing device can be regulated independently - due to the frequent growth of a conventional flushing device have to be. It is thus possible to connect a plurality of flushing devices outside of the converter to a common feed pipe and to provide a control device thereon.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Claims (17)

  1. Dispositif de brassage pour un récipient métallurgique, en particulier un convertisseur d'aciérie, comportant un revêtement réfractaire constituant une fourrure d'usure (7) et des tubes (18, 18') prévus sur des sites prédeterminés de la fourrure d'usure, à travers lesquels tubes passe le gaz de brassage, cependant qu'au moins un insert (26, 26') en forme de barre s'étendant en sens longitudinal du tube (18, 18') est prévu centralement dans chacun des tubes (18, 18') en formant une fente annulaire (30) avec la parois intérieure de tube (29), caractérisé en ce que l'insert (26, 26') est constitué d'un fil et est prévu dans la section de tube (18, 18') qui se trouve dans la fourrure d'usure, de façon libre, c'est-à-dire sans support latéral, et est fixé en position par rapport au tube (18, 18') seulement en sens axial, la fixation de l'insert (26, 26') prévoyant un jeu faible par rapport au tube (18, 18') en sens axial.
  2. Dispositif de brassage pour un récipient métallurgique, en particulier un convertisseur d'aciérie, comportant un revêtement réfractaire constituant une fourrure d'usure (7) et des tubes (18, 18') prévus sur des sites prédeterminés de la fourrure d'usure, à travers lesquels tubes passe le gaz de brassage, cependant qu'au moins un insert (26, 26') en forme de barre s'étendant en sens longitudinal du tube (18, 18') est prévu centralement dans chacun des tubes (18, 18') en formant une fente annulaire (30) avec la parois intérieure de tube (29), caractérisé en ce que l'insert (26, 26') est constitué d'un câble en fils et est prévu dans la section de tube (18, 18') qui se trouve dans la fourrure d'usure, de façon libre, c'est-à-dire sans support latéral, et est fixé en position par rapport au tube (18, 18') seulement en sens axial, la fixation de l'insert (26, 26', 34) prévoyant un jeu faible par rapport au tube (18, 18') en sens axial.
  3. Dispositif de brassage pour un récipient métallurgique, en particulier un convertisseur d'aciérie, comportant un revêtement réfractaire constituant une fourrure d'usure (7) et des tubes (18, 18') prévus sur des sites prédeterminés de la fourrure d'usure, à travers lesquels passe le gaz de brassage, cependant qu'au moins un insert (26, 26') en forme de barre configuré en tant que tube intérieur et s'étendant en sens longitudinal du tube (18, 18') est prévu centralement dans chacun des tubes (18, 18') en formant une fente annulaire (30) avec la parois intérieure de tube (29), caractérisé en ce que l'insert (26, 26') qui est configuré en tant que tube intérieur est prévu dans la section de tube (18, 18') qui se trouve dans la fourrure d'usure, de façon libre, c'est-à-dire sans support latéral, et est fixé en position par rapport au tube (18, 18') seulement en sens axial, la fixation de l'insert (26, 26') prévoyant un jeu faible par rapport au tube (18, 18') en sens axial.
  4. Dispositif de brassage selon l'une des revendications 1 à 3, caractérisé en ce que la section du tube (18, 18') qui se trouve dans la fourrure d'usure (7) et l'insert (26, 26', 34) inséré là-dedans, ou les inserts insérés là-dedans, sont configurés de façon radialement symmetrique.
  5. Dispositif de brassage selon l'une des revendications 1 à 4, caractérisé en ce que le tube (18, 18') est d'une section circulaire.
  6. Dispositif de brassage selon l'une des revendications 1 à 5, caractérisé en ce que le tube (18, 18') a une section en forme d'un polygone régulier, de préference une section d'un carré ou d'un hexagone.
  7. Dispositif de brassage selon l'une des revendications 1 à 6, caractérisé en ce que la fente annulaire (30) a une largeur entre 1 et 3 mm.
  8. Dispositif de brassage selon l'une des revendications 1 à 7, caractérisé en ce que le diamètre intérieur du tube (18, 18') est entre 4 et 12 mm, de préference entre 4 et 8 mm, et le diamètre de l'insert (26, 26', 34) est entre 2 et 8 mm, de préference entre 2 et 5 mm.
  9. Dispositif de brassage selon l'une des revendications 1 à 8, caractérisé en ce que le tube (18, 18') a un épaisseur de parois correspondant approximativement à la moitie du diamétre intérieur du tube.
  10. Dispositif de brassage selon l'une des revendications 1 à 9, caractérisé en ce que le rapport de la longueur du tube (18, 18') qui se trouve dans la fourrure d'usage au diamètre intérieur du tube qui se trouve dans la fourrure d'usage est au moins 16.
  11. Dispositif de brassage selon l'une des revendications 1 à 10, caractérisé en ce qu'au moins deux tubes (18) disposés dans la fourrure d'usure (7) dudit récipient métallurgique à une distance l'un par rapport à l'autre, par leurs extrémités qui se trouvent en dehors de la fourrure d'usure (7), sont raccordés à un tube d'alimentation de gaz commun (15) au point de vue conduite, l'insert (26, 34) de chacun des tubes (18) étant fixé audit tube d'alimentation de gaz (15).
  12. Dispositif de brassage selon l'une des revendications 1 à 10, caractérisé en ce que deux tubes (18) disposés dans la fourrure d'usure (7) dudit récipient métallurgique à une distance l'un par rapport à l'autre, par leurs extrémités qui se trouvent en dehors de la fourrure d'usure (7), sont raccordés à un tube d'alimentation de gaz commun (15) au point de vue conduite, et en ce que les deux tubes comprennent un insert (26, 34) commun qui s'étend à partir de la bouche d'un des tubes jusqu'à la bouche de l'autre des tubes.
  13. Dispositif de brassage selon l'une des revendications 1 à 10, caractérisé en ce que l'insert (26') est fixé en sens axial sur la section de tube (18') qui se trouve en dehors de la fourrage d'usure (7).
  14. Dispositif de brassage selon la revendication 13, caractérisé en ce que l'insert (26') est fixé sur le tube (18') par au moins une nervure de support (32, 33).
  15. Dispositif de brassage selon l'une des revendications 1 à 14, caractérisé en ce que le tube (18, 18') comprend une pluralité d'inserts.
  16. Dispositif de brassage selon l'une des revendications 1 à 17, caractérisé en ce que le tube (18) comprend une section de tube linéaire (31) qui s'étend à un angle par rapport à la section de tube (18) qui se trouve dans la fourrure de l'usure (7), l'insert (26, 34) passant à travers ladite section de tube linéaire.
  17. Dispositif de brassage selon l'une des revendications 1 à 16, caractérisé en ce que des espaces libres restant entre le tube (18, 18') et une fourrure d'usure constituée de briques réfractaires sont remplies d'une masse réfractaire (25).
EP90890176A 1989-06-13 1990-06-07 Installation de lavage pour un récipient métallurgique Expired - Lifetime EP0403466B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3919238A DE3919238A1 (de) 1989-06-13 1989-06-13 Spueleinrichtung fuer ein metallurgisches gefaess
DE3919238 1989-06-13

Publications (3)

Publication Number Publication Date
EP0403466A2 EP0403466A2 (fr) 1990-12-19
EP0403466A3 EP0403466A3 (fr) 1991-12-18
EP0403466B1 true EP0403466B1 (fr) 1994-12-14

Family

ID=6382643

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90890176A Expired - Lifetime EP0403466B1 (fr) 1989-06-13 1990-06-07 Installation de lavage pour un récipient métallurgique

Country Status (4)

Country Link
US (1) US5076551A (fr)
EP (1) EP0403466B1 (fr)
AT (1) ATE115637T1 (fr)
DE (2) DE3919238A1 (fr)

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE43338C (de) * TH. WHITAKER in Horsforth bei Leeds, Grafschaft York., England: Stellvorrichtung für Schöpfeimer bei krahnartigen Ausschachtmaschinen
DE43787C (de) * F. M. ARXER in Dresden Selbstthätiger Messerschleifapparat für Korkschneidemaschinen
NL14277C (fr) * 1916-04-15
US1681913A (en) * 1924-05-19 1928-08-21 Matic electric inc
CH251056A (de) * 1941-11-20 1947-09-30 Ph Polasek Georg Jiri Mg Verfahren zur Herstellung eines Emulgier- und Reinigungsmittels auf Harnstoffharzbasis.
FR64449E (fr) * 1953-07-03 1955-11-10 Perfectionnements aux dispositifs de cardage et produits industriels nouveaux en résultant
NL296346A (fr) * 1962-08-07
US3802684A (en) * 1972-08-29 1974-04-09 Steel Corp Tuyere construction
FR2504664A1 (fr) * 1981-04-24 1982-10-29 Francais Aciers Speciaux Dispositif de soufflage de gaz de brassage dans un convertisseur d'affinage des metaux
US4449701A (en) * 1982-08-23 1984-05-22 Pennsylvania Engineering Corporation Tuyere for the injection of gases into a metallurgical vessel
US4462824A (en) * 1983-06-14 1984-07-31 Allegheny Ludlum Steel Corporation Annular tuyere
AT382889B (de) * 1984-03-15 1987-04-27 Voest Alpine Ag Spueleinrichtung fuer ein metallurgisches gefaess
AT384034B (de) * 1986-02-03 1987-09-25 Voest Alpine Ag Spueleinrichtung fuer ein metallurgisches gefaess
NL8600608A (nl) * 1986-03-10 1987-10-01 Hoogovens Groep Bv Converter voor het bereiden van staal.
US4735400A (en) * 1986-03-28 1988-04-05 Toshin Steel Co., Ltd. Plug for a refining apparatus
DE3810098C1 (fr) * 1988-03-25 1989-03-23 Radex-Heraklith Industriebeteiligungs Ag, Wien, At
US4930757A (en) * 1989-10-02 1990-06-05 Cominco Ltd. Tuyere for metallurgical vessels

Also Published As

Publication number Publication date
ATE115637T1 (de) 1994-12-15
EP0403466A3 (fr) 1991-12-18
US5076551A (en) 1991-12-31
DE3919238A1 (de) 1990-12-20
EP0403466A2 (fr) 1990-12-19
DE59007984D1 (de) 1995-01-26

Similar Documents

Publication Publication Date Title
EP0841517A2 (fr) Dispositif d'injection du combustible pour une chambre de combustion d'une turbine à gaz avec une buse d'injection refroidie par un liquide
EP0630712B1 (fr) Busette de coulée immergée
EP0137961B2 (fr) Dispositif extracteur pour une brique pour lavage au gaz
EP0138802B1 (fr) Lingotière de coulée continue horizontale
EP0148434B1 (fr) Conteneur pour gaz à haute température avec un revêtement isolant fait de plaques qui se recouvrent
EP0403466B1 (fr) Installation de lavage pour un récipient métallurgique
DE2548854A1 (de) Feuerfester stein mit einer durchlassoeffnung fuer fluessiges metall und verfahren zu dessen herstellung
DE4032521C2 (fr)
DE3605536C2 (fr)
EP0232244B1 (fr) Dispositif de rinçage pour un récipient métallurgique
EP0155255A2 (fr) Dispositif de rinçage pour un récipient métallurgique
EP0858515B2 (fr) Dispositif pour remplacement d'une lance de soufflage
EP0809554A1 (fr) Cuve a gaz se presentant sous la forme d'un dispositif de rincage a interstices
DE3149399C1 (de) Tauchausguß
DE69011436T2 (de) Vorrichtung zum Vorheizen einer Giessdüse für geschmolzenes Metall und mit dieser Vorrichtung ausgerüstete Metallgiesseinrichtung.
DE3702561C2 (fr)
DE2259276C3 (de) Vorrichtung zum Einblasen von Sauerstoff durch das feuerfeste Futter eines metallurgischen Konverters
WO1990012987A1 (fr) Dispositif d'amenee de combustibles et d'additifs a des installations de combustion
EP0814929A1 (fr) Busette immergee pour couler du metal
DE602004005346T2 (de) Düsenvorrichtung zum eintragen von gasförmigen medien unter einer schicht von flüssigem metall
WO2005038372A2 (fr) Four industriel et buse associee
EP0461340B1 (fr) Busette de coulée pour obturateur coulissant
DE4492636C2 (de) Abstichloch und Verfahren zur Bildung eines Abflusskanals eines Abstichlochs
DE9404317U1 (de) Einrichtung zum Führen der Brennergase in einem Ofen
EP1917114B1 (fr) Element incombustible muni d'un conduit forme de corps discrets

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19920124

17Q First examination report despatched

Effective date: 19931018

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH (HRB 6375)

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19941214

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19941214

Ref country code: FR

Effective date: 19941214

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19941214

Ref country code: DK

Effective date: 19941214

Ref country code: BE

Effective date: 19941214

REF Corresponds to:

Ref document number: 115637

Country of ref document: AT

Date of ref document: 19941215

Kind code of ref document: T

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH

REF Corresponds to:

Ref document number: 59007984

Country of ref document: DE

Date of ref document: 19950126

ITF It: translation for a ep patent filed

Owner name: MARCHI & MITTLER S.R.L.

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19950314

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19950317

EN Fr: translation not filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBTA Gb: translation of amended ep patent filed (gb section 77(6)(b)/1977)

Effective date: 19950426

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19950607

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19950630

Ref country code: LI

Effective date: 19950630

Ref country code: CH

Effective date: 19950630

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19970513

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19970530

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980607

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19980607

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990401

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050607