EP0521371B1 - Brique pour lavage au gaz - Google Patents

Brique pour lavage au gaz Download PDF

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Publication number
EP0521371B1
EP0521371B1 EP92110551A EP92110551A EP0521371B1 EP 0521371 B1 EP0521371 B1 EP 0521371B1 EP 92110551 A EP92110551 A EP 92110551A EP 92110551 A EP92110551 A EP 92110551A EP 0521371 B1 EP0521371 B1 EP 0521371B1
Authority
EP
European Patent Office
Prior art keywords
gas
purging plug
accordance
connection pipe
matrix material
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
EP92110551A
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German (de)
English (en)
Other versions
EP0521371A1 (fr
Inventor
Andreas Dr. Batton
Jens Decker
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.)
Veitsch Radex GmbH and Co OG
Original Assignee
Veitsch Radex GmbH and Co OG
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 Veitsch Radex GmbH and Co OG filed Critical Veitsch Radex GmbH and Co OG
Publication of EP0521371A1 publication Critical patent/EP0521371A1/fr
Application granted granted Critical
Publication of EP0521371B1 publication Critical patent/EP0521371B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 gas purging plug for metallurgical vessels according to the preamble of claim 1.
  • the gas purging plugs are usually sheet-metal-coated, the bottom of the sheet metal casing running at a distance from the bottom of the ceramic part of the gas purging plug, so that a gas distribution chamber is formed, and a gas connection pipe connects to the bottom of the sheet metal casing (DE 36 23 609 C1).
  • such a gas purging plug comprises various metal parts and is therefore complex.
  • the closure part can be reused, but a large number of metal parts are still necessary.
  • the installation of a so-called breakthrough protection, as described in DE 38 30 871 C1 is only possible to a limited extent in the known gas purging plug.
  • the gas purging plug is difficult to break out after it has worn out.
  • the invention is based on the object of structurally simplifying a gas purging plug of the type mentioned at the outset and designing it in such a way that any structural units, such as a wind box or a breakthrough protection, can be easily connected and the purging plug can be easily dismantled again after it has worn out.
  • the gas connecting piece runs with an open cross section into the purging block. Below the flushing block, the gas connection piece is in a refractory lining.
  • the gas connection piece is at least partially laid in the interior of the ceramic part of the gas purging plug and fixed there. It is designed at the same time so that further components can be connected to the gas connection piece.
  • This can be a gas connection pipe, which itself is part of a breakdown protection, as described in DE 38 30 871 C1.
  • a gas distribution chamber can be formed quasi "in-situ" in that the gas connection piece protrudes downward over the bottom of the ceramic part of the gas purging plug, the gas distribution chamber being located between the free end the gas connection piece and the bottom of the ceramic part of the gas purging plug is formed.
  • the gas-permeable part (for example the gas channels) runs from the bottom of the gas purging plug to its end face.
  • a larger gas distribution chamber can also be arranged at the gas outlet end of the gas connection piece. It can either be hollow (e.g. through Burn out a corresponding filler, which filled the corresponding volume during manufacture) or be covered by a perforated lid. It is also possible to arrange a gas-permeable, preferably ceramic, refractory plug in the gas distribution chamber. This can also act as a "breakthrough protection" against possibly infiltrating molten metal by branching the molten metal stream and thus “freezing" more quickly.
  • the insert can also be used to determine the residual stone thickness if, for example, it has a different thermal conductivity than the matrix material and erosion up to this point can be recognized by different "glow color”.
  • a gas purging plug is known from EP 0 070 197 A1 (FIG. 2), in which a gas distribution chamber is formed below the ceramic body, to which a gas connection pipe connects.
  • This assembly of gas distribution chamber and gas connection pipe can be viewed as a gas connection piece, but runs below the ceramic body of the sink. It follows that there is no intimate mechanical anchoring between the gas connection piece and the ceramic body. This makes it impossible in the known embodiment to pull the sink after its wear over the gas connection piece, for example from a perforated brick.
  • a (further) detachable wind box (gas distribution chamber) can be connected to the device at the gas inlet end of the gas connector, to which in turn a gas supply line can be connected.
  • the wind box can be easily connected at the factory.
  • This wind box can be equipped, for example, with thermocouples for gas temperature measurement or with a device for gas heating. Because the gas distribution chamber is detachable in this design, it can be removed and reused before disassembling a worn sink. This is of considerable economic advantage in particular with regard to the expensive additional devices.
  • the dimensions of the wind box and the connection-side connecting elements can be determined by the user, for example the steelworks.
  • This separate unit which can be detached from the gas purging plug, can finally also be used to record a pressure gauge in order to measure the gas pressure.
  • the mechanical connection of the gas connection piece in the ceramic matrix material can be done in different ways.
  • the corresponding section of the nozzle has reinforcing elements on the outside which improve the mechanical anchoring between the nozzle and the ceramic of the sink.
  • the definition of the nozzle can be favored in that it has holes at the upper end portion, which are penetrated by the matrix material during casting.
  • annular bottom groove is preferably introduced in the finished product and the corresponding cylindrical section of the gas connection piece is later mortared into this groove. Reinforcing elements to improve the anchoring are also advantageous here.
  • one embodiment provides for the gas connecting piece to be tapered at the lower section and to provide the connecting device at the free end of this tapered section.
  • the device for gas-tight connection to the wind box (the gas distribution chamber) and / or a gas supply line can then consist, for example, of a thread or a bayonet fitting.
  • a thread or a bayonet fitting it is also possible to form the end of the gas connecting piece with a flange which, together with a flange of the adjacent component, leads to a conventional flange connection.
  • All embodiments have in common that with the help of a simple, in particular metallic gas connection piece, which is at least partially fixed in the ceramic matrix material of the sink, a universal connection possibility for gas supply lines, gas distribution chambers (with or without additional devices) and / or pull-out devices is created.
  • the gas connector is not only simple, but also easy to position. Modifications to the gas purging plug are not necessary.
  • a sheet metal jacket can be omitted.
  • the gas purging plug can be designed with directional or non-directional porosity.
  • non-directional porosity it is preferably designed in two parts, the porous section being arranged on the inside and surrounded by a dense ceramic material.
  • the ceramic body of the gas purging plug according to FIG. 1 bears the reference number 10.
  • the gas channels 12 run at a distance from one another vertically from the bottom 14 to the end face 16 of the ceramic body 10, specifically here, as shown, only approximately in the middle.
  • a cylindrical gas connector 18 extends around the gas channels 12 into the refractory ceramic Matrix material 20 of the body 10 and is cast in there.
  • the upper section 18a of the connector 18 has reinforcing anchors 22 on the outside.
  • the connector 18 protrudes a little above the base 14.
  • the protruding lower section 18b of the connector 18 is formed with an external thread 24.
  • a sheet metal casing of the ceramic body 10 to form a gas connection piece and / or a gas distribution chamber is therefore not necessary in this embodiment.
  • the space 26 within the lower section 18b of the connector 18 can be used as a gas distribution chamber, a gas supply pipe being connectable via the external thread 24.
  • the connecting piece 18 can also have a tapered connecting piece at its lower free end, as is shown in FIG. 3 and will be explained later.
  • FIG. 1 also enables the connection of an - independent - gas distribution space, optionally with further additional devices as the embodiment according to FIG. 2 shows.
  • An essentially cylindrical metallic body 28 which has an internal thread 30 at its upper end, is connected in a gas-tight manner to the external thread 24 of the connector 18.
  • the body 28 Starting from the internal thread 30, the body 28 initially runs in a cylindrical shape and then widens - in trapezoidal cross section (part 28a) - before another, tapered cylindrical section 28b follows, which has a part of a (not shown) bayonet catch at its free end a (not shown) gas supply pipe can be connected.
  • a gas distribution chamber 26 is formed by the body 28.
  • the body 28, which can also be referred to as a wind box, is - contrary to known embodiments - designed as an independent component that can be detached from the gas purging plug. This makes it possible to connect the wind box 28 to a gas purging plug of the type described in the factory, the specific design of the wind box being able to be adapted to the local conditions. This is also a very significant advantage of the design of the gas purging plug.
  • thermocouple 32 is connected in section 28a, with which the temperature of the supplied gas can be measured.
  • a heating device 34 is also arranged, with which the treatment gas can be preheated.
  • the additional devices mentioned can be assembled stationary in the body 28 because the wind box 28 is reusable.
  • the wind box 28 is unscrewed from the gas connecting piece 18 and - after inserting a new gas purging plug - is put back on its gas connecting piece.
  • the wind box 28 can be part of a breakdown protection, the type of which is described in DE 38 30 871 C1. Of course, it is also possible to connect the above-mentioned break-through protection to the gas connecting piece 18 instead of the body 28.
  • wind box 28 can also be equipped with a plurality of gas supply lines, so that different gases and / or gas / solid mixtures can also be supplied.
  • the embodiment according to FIG. 3 differs from the embodiment according to FIG. 1 only in two features.
  • the free lower end of the connector 18 is tapered, which creates a separate gas distribution chamber 26.
  • the upper section 18b of the connector 18 is not cast into the ceramic matrix material 20, but is inserted into a corresponding annular groove and fixed there by means of a mortar 36.
  • the annular groove 35 can, for example, be milled out after the ceramic body 10 has been produced.
  • FIGS. 1 to 3 show frustoconical gas purging plugs
  • the purging plug according to FIG. 4 essentially has a rectangular cross section.
  • the cross-sectional area at the lower end is slightly larger than at the upper end.
  • the sink according to Figure 4 is a sink with undirected porosity.
  • a gas-permeable insert 38 is inserted into a sealed refractory receptacle 40.
  • the insert 38 ends at a distance from the bottom 14 of the ceramic body 10.
  • a gas distribution chamber 26 At the lower end of the insert 38 there is a gas distribution chamber 26, to which the gas connecting piece 18 continues downward, which in turn runs with its upper section 18a in the matrix material 20 and whose lower portion 18b protrudes above the floor 14.
  • the upper end of the gas distribution chamber 26 is covered here by a perforated plate 18c, and the section 18a is tapered on the bottom side, as is the section 18b.
  • a gas-permeable plug 42 made of refractory ceramic is used in the gas distribution chamber 26.
  • This embodiment is also particularly suitable when the gas distribution chamber 26 has no cover and instead of the section 38 with undirected porosity, gas channels run from the plug 42 to the upper end face 16 of the sink.
  • reinforcing elements on the gas connection piece 18 can be dispensed with here.
  • the components can be connected to the lower end of the gas outlet connection 18, as explained with reference to FIGS. 1 to 3.
  • the free lower end of the gas connecting piece 18 can also be used as an adapter for connecting a pull-out device for the gas purging plug if the purging plug is to be pulled out of an associated perforated block or the bottom of a metallurgical vessel after wear.
  • the components integrated in the refractory ceramic preferably have a coefficient of thermal expansion that comes as close as possible to that of the matrix material of the sink.
  • flushing stone geometry is not restricted to the exemplary embodiments shown. It can be varied as required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Colloid Chemistry (AREA)
  • Detergent Compositions (AREA)

Claims (11)

  1. Brique de balayage, pour récipients métallurgiques, avec une tubulure de raccordement de gaz (18) sensiblement cylindrique, se projetant du fond (14) du corps céramique (10) de la brique de balayage, en direction du bas, présentant à son extrémité côté introduction du gaz (18b) un dispositif (24) destiné à établir un raccordement étanche aux gaz, à une chambre de distribution de gaz (28) ou à une conduite d'amenée de gaz, et s'étendant en direction de la face frontale (16) de la brique de balayage de gaz, dans son matériau de matrice (20), et se raccordant, par son tronçon d'extrémité côté évacuation du gaz (18a), à un tronçon (12,38, perméable aux gaz, de la brique de balayage, caractérisée en ce que la partie perméable aux gaz de la brique de balayage se prolonge, sur le tronçon d'extrémité côté évacuation des gaz (18a) de la tubulure de raccordement de gaz, en pénétrant dans la tubulure de raccordement de gaz (18) et en allant jusqu'au fond (14) de la brique de balayage, et la tubulure de raccordement de gaz (18) est ancrée dans le matériau de matrice céramique de la brique de balayage de gaz,
  2. Brique de balayage selon la revendication 1, dans laquelle le tronçon (18b) de la tubulure de raccordement de gaz (18)se projetant vers le bas, est réalisée avec une section transversale allant en s'effilant en direction de son extrémité libre,
  3. Brique de balayage selon la revendication 1 ou 2, dans laquelle le tronçon situé côté évacuation des gaz (18a) de la tubulure de raccordement de gaz (18),est réalisée par moulage dans le matériau de matrice (20) du corps céramique (10) de la brique de balayage de gaz,
  4. Brique de balayage selon la revendication 1 ou 2, dans laquelle au moins le tronçon (18a) de la tubulure de raccordement de gaz (18), situé côté évacuation des gaz, est fixé, par l'intermédiaire d'un mortier (36), dans une rainure (35)correspondante, s'étendant, depuis le fond (14), dans le matériau de matrice (20),
  5. Brique de balayage selon l'une des revendications 1 à 4,, dans laquelle le dispositif (24) est composé d'un filetage.
  6. Brique de balayage selon l'une des revendications 1 à 5, dans laquelle le dispositif (24) est composé d'une fermeture à baïonnette,
  7. Brique de balayage selon l'une des revendications 1 à 5, dans laquelle le dispositif (24) est composé d'une bride appartenant à une liaison par bride,
  8. Brique de balayage selon l'une des revendications 1 à 7, dans laquelle le tronçon de la tubulure de raccordement de gaz (18), s'étendant dans le matériau de matrice (20), présente extérieurement des ancrages d'armature (22) fixés dans le matériau de matrice (20).
  9. Brique de balayage selon l'une des revendications 1 à 8, dans laquelle le tronçon de la tubulure de raccordement de gaz (18), s'étendant dans le matériau de matrice (20), présente des passages, remplis du matériau de matrice,
  10. Brique de balayage selon l'une des revendications 1 à 9, dans laquelle l'extrémité supérieure de la tubulure de raccordement de gaz (18) se raccorde à une chambre de distribution de gaz (42),
  11. Brique de balayage selon la revendication 10, dans laquelle un bouchon perméable aux gaz, réfractaire, céramique, est disposé dans la chambre de distribution de gaz (42).
EP92110551A 1991-06-28 1992-06-23 Brique pour lavage au gaz Expired - Lifetime EP0521371B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4121329 1991-06-28
DE4121329A DE4121329C2 (de) 1991-06-28 1991-06-28 Gasspülstein

Publications (2)

Publication Number Publication Date
EP0521371A1 EP0521371A1 (fr) 1993-01-07
EP0521371B1 true EP0521371B1 (fr) 1994-12-21

Family

ID=6434921

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92110551A Expired - Lifetime EP0521371B1 (fr) 1991-06-28 1992-06-23 Brique pour lavage au gaz

Country Status (5)

Country Link
US (1) US5312092A (fr)
EP (1) EP0521371B1 (fr)
AT (1) ATE116007T1 (fr)
CA (1) CA2072483C (fr)
DE (2) DE4121329C2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9301563U1 (de) * 1993-02-04 1993-03-25 Beck u. Kaltheuner Feuerfeste Erzeugnisse GmbH & Co KG, 5970 Plettenberg Keramischer Spülstein für Stahlbehandlungspfannen
DE4335643C1 (de) * 1993-10-15 1994-10-27 Mannesmann Ag Verfahren und Vorrichtung zum Einleiten von Gasen in Metallschmelzen
US7968047B2 (en) * 2005-02-10 2011-06-28 Wahl Refractory Solutions, Llc Blaster nozzle
CN104641005A (zh) * 2012-05-18 2015-05-20 维苏威坩埚公司 透气塞
ES2592174T3 (es) * 2012-08-27 2016-11-28 Refractory Intellectual Property Gmbh & Co. Kg Elemento de purga de gas con conducto de suministro de gas correspondiente
US10160067B2 (en) * 2013-05-10 2018-12-25 Illinois Tool Works Inc. Data acquisition using a purge plug

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL74999C (fr) * 1952-01-21
AU541441B2 (en) * 1981-07-15 1985-01-10 Nippon Steel Corporation Bottom blowing nozzle embedded in a refractory block
GB2120369A (en) * 1982-05-20 1983-11-30 Ksr Int Ltd An improved metallurgical lance
GB2122532A (en) * 1982-05-20 1984-01-18 K S R International Limited Manufacture of gas-permeable plugs
DE3622609A1 (de) * 1986-07-05 1988-01-07 Bayer Ag Verfahren zur herstellung von fluessig-kristallinen nco-polyurethanpraepolymeren und deren verwendung
DE3623609C1 (de) * 1986-07-12 1988-01-21 Didier Werke Ag Gasspueleinrichtung
US4836433A (en) * 1988-05-13 1989-06-06 Insul Company, Inc. Device for introducing stirring gas into molten metal in metered amount
US4840356A (en) * 1988-06-13 1989-06-20 Labate Michael D Externally replaceable stirring plug for molten metal vessels
DE3830871C1 (fr) * 1988-09-10 1989-11-02 Radex-Heraklith Industriebeteiligungs Ag, Wien, At
DE3833505C1 (fr) * 1988-10-01 1990-02-15 Didier-Werke Ag, 6200 Wiesbaden, De
DE3833502A1 (de) * 1988-10-01 1990-04-05 Didier Werke Ag Gasspuelstein

Also Published As

Publication number Publication date
CA2072483C (fr) 1996-02-20
CA2072483A1 (fr) 1992-12-29
DE59201010D1 (de) 1995-02-02
DE4121329C1 (fr) 1992-05-21
DE4121329C2 (de) 1995-09-07
ATE116007T1 (de) 1995-01-15
EP0521371A1 (fr) 1993-01-07
US5312092A (en) 1994-05-17

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