EP1590111B1 - Feuerfester keramischer gasspülstein - Google Patents

Feuerfester keramischer gasspülstein Download PDF

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Publication number
EP1590111B1
EP1590111B1 EP03815339A EP03815339A EP1590111B1 EP 1590111 B1 EP1590111 B1 EP 1590111B1 EP 03815339 A EP03815339 A EP 03815339A EP 03815339 A EP03815339 A EP 03815339A EP 1590111 B1 EP1590111 B1 EP 1590111B1
Authority
EP
European Patent Office
Prior art keywords
gas
gas flushing
channel
flushing brick
brick according
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
EP03815339A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1590111A1 (de
Inventor
Andreas Drescher
Johannes Taferner
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
Original Assignee
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.)
Filing date
Publication date
Application filed by Refractory Intellectual Property GmbH and Co KG filed Critical Refractory Intellectual Property GmbH and Co KG
Publication of EP1590111A1 publication Critical patent/EP1590111A1/de
Application granted granted Critical
Publication of EP1590111B1 publication Critical patent/EP1590111B1/de
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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture

Definitions

  • the invention relates to a refractory ceramic gas purging plug for installation in a wall or a bottom of a vessel for receiving a molten metal, wherein the gas purging plug has at least one channel extending from the cold side of the gas purging plug to a hot side of the gas purging plug, and the channel is fluidically connected to the cold side of the gas purging plug is connected to a gas supply, via which a treatment gas can be passed through the channel into the molten metal.
  • Such a gas purging plug is referred to as a gas purging plug "with directed porosity" due to the arrangement of a gas purging channel.
  • the further nomenclature can be found in the summary in "Radex-Rundschau", 1987, 288.
  • gas purging elements with "undirected porosity” are known in which the gas from the cold to the hot side of the gas purging plug by an "open pore framework" within of the refractory matrix material moves.
  • the term “cold side” or “hot side” is concerned, this obviously refers to the installation state of the gas purging plug in a vessel for receiving (including treatment) a molten metal.
  • the hot side is thus the side which is immediately adjacent to the molten metal, wherein the molten metal is usually applied against the hot side.
  • the cold side is correspondingly the side of the Gas Whyriis, which is adjacent to the outer vessel shell.
  • a gas purging element of the generic type shows the DE 38 10 098 C1.
  • a gas purging plug to a plurality of purge channels, which extend substantially in the axial direction of the gas purging plug (that is, in the flow direction of the gas).
  • a length of the gas purging plug between 30 and 120 cm, it is clear that the formation of Spülkanäle within the ceramic base material is extremely difficult, especially since the channels have a diameter ⁇ 5 mm, in part ⁇ 2 mm in the rule. This is not important in the state of the art but also because it is all about the gas from the Cold side to the hot side and then to promote the molten metal.
  • the Gas Hugheskanäle fulfill their function accordingly, if they are curved, crooked or in any way discontinuous between the cold and hot side.
  • the aim of gas purging, for example, in a steel ladle are, in particular, rapid temperature and concentration equalization of the steel bath and its cleaning.
  • non-metallic inclusions are to be transported faster by means of the gas flow in the floating slag on the molten bath.
  • EP 0082078 A1 discloses a gas purging plug in which two electrical conductors which are insulated from one another run. The conductors extend from the cold to the hot side of the rinse and end at different distances to the hot side. As soon as the melt has eroded the purging plug to the free end of both conductors, an electrical circuit is closed and the current flow is indicated by a signal. This signal gives the information about the state of wear of the purging plug.
  • the invention has the object of reshaping a gas purging plug of the type mentioned so that it can take on further tasks.
  • These further tasks include, in particular, the observation (control) of the operating state of the molten metal to be treated, for example the temperature and composition of the melt.
  • the channel in which the measuring head is inserted is suitable for conducting electromagnetic signals from the melt to the measuring head.
  • the gas distribution chamber may be subdivided into sub-chambers. Individual groups of channels can then be switched on or off. Likewise, various purge gases can be supplied.
  • the channel initially does not differ from a conventional purging channel; he is free of internals. Only in the "back" third (on the cold side) is the measuring head, which can be flowed around by purge gas. This part of the channel may have a larger cross-section than the section seen from the hot side. The transition can be gradual or fluent.
  • the "measuring channel” should run in a straight line.
  • “Straight line” is defined according to the invention so that the measuring head can detect at least 50% of the cross-sectional area of the channel on the hot side of the gas purging plug. Ideally, the value will be 100%.
  • the channel can run at right angles to the hot-side end face of the gas purging plug, that is to say parallel to the central longitudinal axis of the gas purging plug, provided the gas purging plug is, for example, cylindrical or truncated cone-shaped.
  • the channel can also run at an angle not equal to 90 ° to the end face, if the gas is to be directed, for example purposefully in the middle of the molten metal.
  • the channel may be formed with different inner cross-section.
  • the cross section may extend continuously or discontinuously from the cold side to the hot side of the gas purging plug - or vice versa; Of course it can also be constant.
  • the cross-sectional area of the channel is usually between 0.5 and 20 mm 2 , especially on the hot side.
  • the cross-sectional shape of the channel is basically arbitrary. It may, for example, be circular, triangular, rectangular or have the shape of a polygon, oval or a star shape.
  • Corresponding cross-sectional shapes also apply to the measuring device, with the measuring device and channel preferably having different cross-sectional shapes in order to ensure the necessary flow around the measuring head with flushing gas.
  • an embodiment proposes that at least the projecting into the channel part of the measuring device has a cross-sectional shape that differs from the cross-sectional shape of the corresponding channel portion.
  • the channels can be drilled.
  • the individual channels can be formed by prefabricated tubes that are integrated into the gas purging plug. These tubes may for example consist of ceramic or metal and inside have a surface that reflects electromagnetic radiation.
  • the channels can also be created by burning out mold elements during the production of the rinsing device.
  • This channel formation is particularly advantageous when the measuring device is designed to receive and transmit electromagnetic waves that are emitted by the molten metal in the channel.
  • the measuring device then comprises parts for receiving and transmitting electromagnetic waves, in particular in the visible light range and / or in the infrared spectral range and / or in the UV range.
  • electromagnetic waves are emitted by the molten metal and can be converted in an associated evaluation unit into temperature values and / or values for determining a chemical analysis.
  • Such devices are known, for example from WO-A-97/22859 and WO-A-02/48661.
  • the gas purging plug can also be designed with a residual strength indicator.
  • the residual strength indicator is then activated when the gas purging plug has worn out so far that subsequently the functionality of the measuring device would be impaired.
  • a residual intensity indicator can be formed, for example, by a gas channel which extends from the gas distribution chamber, but ends at a certain distance to the hot side of the purging plug. Only when the gas purging plug is worn down to this area, the channel is virtually “opened” and gas flows through the channel into the molten metal. At the same time, the gas pressure inside the associated gas distribution chamber drops, which can be displayed accordingly.
  • the measuring device can be arranged particularly advantageously in the region of the gas distribution chamber. It can be inserted through an opening in the outer wall of the gas distribution chamber and extend through the gas distribution chamber into the described channel.
  • a stuffing box seal can guide the metering device and seal against the gas distribution chamber.
  • the gas distribution chamber may be releasably secured to a flange attached to the cold side of the purifier for interchangeability and reuse, for example.
  • a gas distribution chamber 22 connects, which is constructed as follows:
  • the gas distribution chamber 22 is delimited by a lower end face 26 of the ceramic body 10.
  • a metal shell 24 which is shrunk onto the cold end 12 of the body 10 and projects beyond the end face 26 downwards.
  • a floor panel 28 closes the jacket 24 in parallel and at a distance from the end face 26.
  • a first opening 30 serves to connect a gas supply pipe 32, which is part of a gas supply device 34, which, inter alia, comprises a gas reservoir (not shown).
  • a measuring device 38 Through a further opening 36 extends a measuring device 38.
  • the measuring device 38 is on the outside by a gland seal 41 gas-tight relative to the bottom plate 28 and extends the rest through the Gasverteilhunt 22 in the channel 16, with a measuring head 40.
  • the measuring head 40 ends at a distance in front of an upper edge 42 of the metal shell 24, ie with a large distance in front of the front side 20 at the hot end 14 of the Spülstein stressess 10th
  • the flushing channel 16 has an inner diameter which is 1.5 mm larger than the outer diameter of the measuring head 40, so that a 0.75 mm wide annular gap runs around the measuring head 40 on all sides. Accordingly, gas can flow from the gas distribution chamber 22 around the measuring head 40 and subsequently through the channel 16 to the hot side 20. Of course, this applies analogously to the channel 18 and further (not shown) flushing channels.
  • the measuring head 40 is designed such that it receives the electromagnetic waves emitted by a molten metal into the channel 16 and passes them on to an evaluation unit 44, which calculates the temperature of the molten metal on the basis of the intensity of the received electromagnetic waves.
  • Further measuring devices can be arranged in further flushing channels in an analogous manner, for example in order to determine the chemical composition of the molten metal.
  • FIG. 2 shows a second embodiment of a gas purging device according to the invention. In the following, only the essential differences from the embodiment according to FIG. 1 will be described further.
  • a metal flange 50 is fastened on the outside, which has a radially projecting leg 52.
  • the circumferential metal shell 24 of the gas distribution chamber 22 is bent at its upper end corresponding radially outwardly (leg 25).
  • the gas distribution chamber 22 can be releasably secured by screws 54 on the flange 52.
  • the gas distribution chamber 22 can be removed and attached analogously to a new ceramic body 10. In this way, especially the measuring device 38 can be easily reused.
  • the flushing channel 18 has a smaller cross-sectional area than in the exemplary embodiment according to FIG. For the flushing channel 16, this only applies with respect to the section above the measuring head 40, so that the channel 16 is formed in the transition region with a step 17.
  • the upper portion of the channel 16 is formed by a ceramic tube 60 embedded in the body 10.
  • the measuring head 40 is sealed off from the interior of the gas distribution chamber 22 by a ring seal 23. Purging gas is passed into the channel 16 only behind the measuring head 40 (in FIG. 2: above the measuring head 40) via a further flushing channel 19, which has the function of a bypass.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Valve Housings (AREA)
EP03815339A 2003-02-08 2003-12-24 Feuerfester keramischer gasspülstein Expired - Lifetime EP1590111B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10305232 2003-02-08
DE10305232A DE10305232B3 (de) 2003-02-08 2003-02-08 Feuerfester keramischer Gasspülstein
PCT/EP2003/014904 WO2004069450A1 (de) 2003-02-08 2003-12-24 Feuerfester keramischer gasspülstein

Publications (2)

Publication Number Publication Date
EP1590111A1 EP1590111A1 (de) 2005-11-02
EP1590111B1 true EP1590111B1 (de) 2006-09-20

Family

ID=32668004

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03815339A Expired - Lifetime EP1590111B1 (de) 2003-02-08 2003-12-24 Feuerfester keramischer gasspülstein

Country Status (12)

Country Link
US (1) US20060188692A1 (pt)
EP (1) EP1590111B1 (pt)
KR (1) KR20050105998A (pt)
CN (1) CN100360259C (pt)
AT (1) ATE340041T1 (pt)
AU (1) AU2003303859A1 (pt)
BR (1) BR0318094A (pt)
CA (1) CA2514888A1 (pt)
DE (2) DE10305232B3 (pt)
ES (1) ES2273093T3 (pt)
WO (1) WO2004069450A1 (pt)
ZA (1) ZA200506281B (pt)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010007126B3 (de) * 2010-02-05 2011-07-07 Refractory Intellectual Property Gmbh & Co. Kg Gasspüleinrichtung

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RS54558B1 (en) 2014-01-09 2016-06-30 Refractory Intellectual Property Gmbh & Co. Kg GAS Purification Element and Corresponding GAS CONNECTION ELEMENT
EP2942406B1 (de) * 2014-05-05 2016-04-13 Refractory Intellectual Property GmbH & Co. KG Feuerfestes keramisches Gasspülelement
ES2685248T3 (es) * 2014-09-29 2018-10-08 Refractory Intellectual Property Gmbh & Co. Kg Dispositivo de fijación para un cuerpo hueco cerámico cilíndrico y un tapón de purga de gas cerámico refractario con un dispositivo de fijación de este tipo
RU2769101C1 (ru) * 2018-01-29 2022-03-28 Рефрактори Интеллектуал Проперти Гмбх & Ко. Кг Газопродувочная пробка, газопродувочная система, способ исследования газопродувочной пробки и способ продувки расплавленного металла

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT291322B (de) * 1968-12-19 1971-07-12 Voest Ag Vorrichtung zur Einführung von Meßinstrumenten in ein metallurgisches Gefäß
AR207871A1 (es) * 1974-08-08 1976-11-08 Maximilianshuette Eisenwerk Tobera de inyeccion de gas reactivo en recipientes de fusion o de afino para metales
FR2518240A1 (fr) * 1981-12-16 1983-06-17 Siderurgie Fse Inst Rech Element refractaire permeable pour l'introduction d'un fluide de brassage dans un bain de metal en fusion
DE3503221A1 (de) * 1985-01-31 1986-08-14 Didier-Werke Ag, 6200 Wiesbaden Feuerfester gasdurchlaessiger stein
GB8514587D0 (en) * 1985-06-10 1985-07-10 Britannia Refined Metals Ltd Recovery of metals from their alloys with lead
US4741515A (en) * 1986-10-20 1988-05-03 Bethlehem Steel Corporation Apparatus for introducing gas into a metallurgical vessel
DE3810098C1 (pt) * 1988-03-25 1989-03-23 Radex-Heraklith Industriebeteiligungs Ag, Wien, At
DE4131756A1 (de) * 1991-09-24 1993-04-01 Plibrico Gmbh Gasspuelstein
DE4223108C1 (en) * 1992-07-14 1993-08-19 Veitscher Magnesitwerke-Actien-Gesellschaft, Wien, At Ceramic distributor element - with at least one gas channel provided with a restrictor
TW337553B (en) * 1995-12-20 1998-08-01 Voest Alpine Ind Anlagen Method for determination of electromagnetic waves originating from a melt
DE19954918C2 (de) * 1999-11-16 2001-09-20 Veitsch Radex Gmbh Wien Feuerfester keramischer Gasspülstein
AT410031B (de) * 2000-12-01 2003-01-27 Voest Alpine Ind Anlagen Einrichtung zur aufnahme und weiterleitung elektromagnetischer wellen, die von einer materialprobe ausgesendet werden

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010007126B3 (de) * 2010-02-05 2011-07-07 Refractory Intellectual Property Gmbh & Co. Kg Gasspüleinrichtung

Also Published As

Publication number Publication date
CN100360259C (zh) 2008-01-09
AU2003303859A1 (en) 2004-08-30
CN1764511A (zh) 2006-04-26
DE50305145D1 (de) 2006-11-02
ATE340041T1 (de) 2006-10-15
EP1590111A1 (de) 2005-11-02
ZA200506281B (en) 2006-04-26
BR0318094A (pt) 2005-12-20
US20060188692A1 (en) 2006-08-24
DE10305232B3 (de) 2004-08-05
CA2514888A1 (en) 2004-08-19
ES2273093T3 (es) 2007-05-01
WO2004069450A1 (de) 2004-08-19
KR20050105998A (ko) 2005-11-08

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