EP1590111A1 - Feuerfester keramischer gasspülstein - Google Patents
Feuerfester keramischer gasspülsteinInfo
- Publication number
- EP1590111A1 EP1590111A1 EP03815339A EP03815339A EP1590111A1 EP 1590111 A1 EP1590111 A1 EP 1590111A1 EP 03815339 A EP03815339 A EP 03815339A EP 03815339 A EP03815339 A EP 03815339A EP 1590111 A1 EP1590111 A1 EP 1590111A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas purging
- purging plug
- gas
- channel
- plug 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.)
- Granted
Links
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 metal melt, wherein the gas purging plug has at least one channel running from the cold side of the gas purging plug to a hot side of the gas purging plug and the duct on the cold side of the gas purging plug is connected to a gas supply device, via which a treatment gas can be fed through the channel into the molten metal.
- a gas purging plug is referred to because of the arrangement of a gas purging channel as a gas purging plug “with directed porosity. The more extensive nomenclature can be found in the summary in "Radex-Rundschau", 1987, 288.
- gas purging elements with “non-directional porosity” are known, in which the gas moves from the cold to the hot side of the gas purging block through an "open pore structure" of the refractory matrix material.
- hot side Insofar as one speaks of “cold side” or “hot side”, this obviously refers to the installed state of the gas flushing plug in a vessel for receiving (including treatment) a molten metal.
- the hot side is therefore the side which is immediately adjacent to the molten metal, the molten metal generally abutting the hot side.
- the cold side is accordingly the side of the gas purging element that is adjacent to the outer vessel jacket.
- a gas purging element of the generic type is shown in DE 38 10 098 Cl.
- Such a gas purging plug usually has a large number of purging channels which are located in the Extend essentially in the axial direction of the gas purging plug (ie in the direction of flow of the gas). If one assumes a length of the gas flushing block between 30 and 120 cm, it becomes clear that the formation of the flushing channels within the ceramic base material is extremely difficult, especially since the channels generally have a diameter ⁇ 5 mm, sometimes ⁇ 2 mm. However, this is also not important in the prior art because the only issue is to convey the gas from the cold side to the hot side and then into the molten metal.
- the gas purging channels accordingly also fulfill their function if they are curved, crooked or in any way run discontinuously between the cold and hot sides.
- EP 1 101 825 A1 discloses a gas purging element with directed porosity, in which the purging channels are formed between adjacent ceramic bodies.
- the aim of gas purging for example in a steel ladle, is in particular a quick temperature and concentration compensation of the steel bath and its cleaning.
- non-metallic inclusions should be conveyed faster into the slag floating on the molten bath with the help of the gas stream.
- the aforementioned DE 38 10 098 C1 also offers the possibility of guiding an alloy wire into the melt along a tubular passage channel in the gas purging stone.
- the alloy wire is supplied from the outside and runs through a gas distribution chamber, which is formed at the cold end of the gas purging plug and supplies the further purging channels with purging gas.
- known gas purging devices are parts for the secondary metallurgical treatment of molten metals.
- the invention has for its object to redesign a gas purging plug of the type mentioned so that it can take on other 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 invention proposes a gas purging plug of the type mentioned at the beginning, which has the following additional features:
- At least one measuring device for determining physical and / or chemical data of the molten metal, which is adjacent to the hot side of the gas purging plug after the installation of the gas purging plug in the
- the measuring device with a measuring head protrudes into a channel of the gas purging plug. At least one of the gas purging channels of the gas purging plug is used to accommodate a measuring device.
- the measuring device should be inserted into the channel on the cold side of the sink.
- the measuring device should be arranged and attached so that it can be detached. In this way, the measuring device can be removed when the dishwasher is changed (after it has worn out) and reused for a new dishwasher. It can be attached to the outer jacket of the metallurgical vessel or to the cold-side end of the gas purging plug.
- An attachment option also offers a gas distribution chamber, which can be attached to the cold side of the gas purging plug.
- the gas distribution chamber can be detachably attached to the cold end of the gas purging plug.
- Parts of the gas distribution chamber can also be detachably fixed here.
- the gas distribution chamber serves to distribute the gas from the gas supply device to a number of flushing channels.
- the channel into which the measuring head of the measuring device is inserted can also be flushed.
- a passage opening for the treatment gas remains free between the measuring head and the channel.
- the through opening can be an annular channel between the measuring head and the rinsing channel.
- the purging device can also be designed so that the purging gas is first introduced "behind" the measuring head into the channel section extending in the extension of the channel for receiving the measuring head (in the manner of a bypass).
- the measuring head can be cooled.
- Different function channels can be supplied with gas from a single gas distribution chamber.
- the gas flow or gas admission prevents molten metal from penetrating (infiltration) into the channel in which the measuring head lies.
- the measuring head can directly receive signals from the molten metal.
- the channel in which the measuring head is inserted is suitable for guiding electromagnetic signals from the melt to the measuring head.
- the gas distribution chamber can be divided into subchambers. Individual groups of channels can then be switched on or off. Different purge gases can also be supplied.
- the channel does not initially differ from a conventional purging channel; it is free of internals. Only in the "rear" third (on the cold side) is the measuring head, which can be flushed with flushing gas. This part of the channel can have a larger cross section than the section lying in front of it from the hot side. The transition can be stepped or smooth.
- the “measuring channel” should run in a straight line.
- “straight-line” is defined in such a way 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. In the ideal case, the value will be 100%.
- the channel can run at right angles to the hot end face of the gas purging plug, that is to say parallel to the central longitudinal axis of the gas purging plug, provided that the gas purging plug is, for example, cylindrical or frustoconical.
- the channel can also run at an angle unequal to 90 ° to the end face, provided that the gas is to be directed specifically into the center of the molten metal, for example.
- the channel can be designed with a different internal cross section.
- the cross-section can widen continuously or discontinuously from the cold side to the hot side of the gas purging plug - or vice versa; it can of course also be constant.
- the cross-sectional area of the channel, especially on the hot side, is usually between 0.5 and 20 mm 2 .
- the cross-sectional shape of the channel is basically arbitrary. It can, 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 of flushing gas around the measuring head.
- an embodiment proposes that at least the part of the measuring device that projects into the channel has a cross-sectional shape that deviates from the cross-sectional shape of the corresponding channel section.
- the channels can be drilled.
- the individual channels can be formed by pre-assembled tubes that are integrated in the gas purging plug. These tubes can be made of ceramic or metal, for example, and have a surface on the inside that reflects electromagnetic radiation.
- the channels can also be created by burning out shaped elements during the manufacture of the flushing device.
- the measuring device is designed to receive and transmit electromagnetic waves which are emitted into the channel by the molten metal.
- the measuring device then comprises parts for recording and transmitting electromagnetic waves, in particular in the visible light range and / or in the infrared spectral range and / or in the UN range.
- electromagnetic waves are emitted by the molten metal and can be converted into temperature values and / or values for determining a chemical analysis in an associated evaluation unit.
- 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 activated when the gas purging plug is worn out to such an extent that the functionality of the measuring device would subsequently be impaired.
- Such a residual strength indicator can be formed, for example, by a gas channel which runs from the gas distribution chamber but ends at a certain distance from the hot side of the sink. Only when the gas purging plug is worn out to this area is the channel virtually "opened” and gas flows through the channel into the molten metal. At the same time, the gas pressure within the associated gas distribution chamber drops, which can be indicated accordingly.
- the measuring device can be arranged particularly advantageously in the area of the gas distribution chamber. It can be inserted through an opening in the outer wall of the gas distribution chamber and can extend through the gas distribution chamber into the channel described.
- a gland seal can guide the measuring device and seal it against the gas distribution chamber.
- the gas distribution chamber can, for example, be releasably attached to a flange which is attached to the cold side of the washer.
- this consists in a conventional manner of a refractory ceramic body 10 with a “cold side” 12 and a “hot side” 14. Flushing channels 16, 18 extend from the cold side 12 to the hot side 14.
- the central longitudinal axes M16, M18 of the flushing channels 16, 18 run exactly parallel to the central longitudinal axis M of the gas purging plug and at right angles to the end face 20 of the hot side 14 of the body 10.
- a gas distribution chamber 22 connects to the cold side 12 of the body 10 and is constructed as follows:
- the gas distribution chamber 22 is delimited on the upper side by a lower end face 26 of the ceramic body 10.
- a metal jacket 24 extends on the U-side, which is shrunk onto the cold-side end 12 of the body 10 and projects downward beyond the end face 26.
- a bottom plate 28 closes the jacket 24 in parallel and at a distance from the end face 26. Two openings are provided in the base plate 28.
- a first opening 30 is used to connect a gas supply pipe 32, which is part of a gas supply device 34, which includes a gas reservoir (not shown).
- a measuring device 38 extends through a further opening 36.
- the measuring device 38 is on the outside Attached in a gastight manner to the base plate 28 by means of a stuffing box seal 41 and, moreover, extends through the gas distribution chamber 22 into the channel 16, namely with a measuring head 40.
- the measuring head 40 ends at a distance from an upper edge 42 of the metal jacket 24, that is to say at a large distance in front of the end face 20 at the hot end 14 of the sink body 10.
- the rinsing channel 16 has an inner diameter that is 1.5 mm larger than the outer diameter of the measuring head 40, so that a 0.75 mm wide annular gap extends around the measuring head 40 on all sides.
- gas can flow from the gas distribution chamber 22 around the measuring head 40 and further through the channel 16 to the hot side 20.
- the measuring head 40 is designed such that it receives the electromagnetic waves emitted by a molten metal in the channel 16 and forwards them to an evaluation unit 44, which calculates the temperature of the molten metal based on the intensity of the received electromagnetic waves.
- Further measuring devices can be arranged in further rinsing 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. Only the essential differences from the embodiment according to FIG. 1 are further described below.
- a metal flange 50 is attached on the outside, which has a radially projecting leg 52.
- the circumferential metal jacket 24 of the gas distribution chamber 22 is correspondingly bent radially outward at its upper end (leg 25).
- the gas distribution chamber 22 can thus be releasably attached to the flange 52 by means of screws 54.
- the gas distribution chamber 22 can be removed and attached analogously to a new ceramic body 10. In this way, above all, the measuring device 38 can also be reused without any problems.
- the rinsing channel 18 has a smaller cross-sectional area than in the exemplary embodiment according to FIG. 1. For the rinsing channel 16, this only applies in relation to the section above the measuring head 40, so that the channel 16 is formed with a step 17 in the transition area.
- the upper section of the channel 16 is formed by a ceramic tube 60 which is embedded in the body 10.
- the measuring head 40 is sealed off from the interior of the gas distribution chamber 22 by an annular seal 23. Purge gas is only passed into the duct 16 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)
Description
Claims
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 true EP1590111A1 (de) | 2005-11-02 |
EP1590111B1 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 (de) |
EP (1) | EP1590111B1 (de) |
KR (1) | KR20050105998A (de) |
CN (1) | CN100360259C (de) |
AT (1) | ATE340041T1 (de) |
AU (1) | AU2003303859A1 (de) |
BR (1) | BR0318094A (de) |
CA (1) | CA2514888A1 (de) |
DE (2) | DE10305232B3 (de) |
ES (1) | ES2273093T3 (de) |
WO (1) | WO2004069450A1 (de) |
ZA (1) | ZA200506281B (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010007126B3 (de) * | 2010-02-05 | 2011-07-07 | Refractory Intellectual Property Gmbh & Co. Kg | Gasspüleinrichtung |
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)
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 (de) * | 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 |
-
2003
- 2003-02-08 DE DE10305232A patent/DE10305232B3/de not_active Expired - Fee Related
- 2003-12-24 US US10/544,688 patent/US20060188692A1/en not_active Abandoned
- 2003-12-24 EP EP03815339A patent/EP1590111B1/de not_active Expired - Lifetime
- 2003-12-24 CA CA002514888A patent/CA2514888A1/en not_active Abandoned
- 2003-12-24 DE DE50305145T patent/DE50305145D1/de not_active Expired - Lifetime
- 2003-12-24 BR BR0318094-8A patent/BR0318094A/pt not_active IP Right Cessation
- 2003-12-24 ES ES03815339T patent/ES2273093T3/es not_active Expired - Lifetime
- 2003-12-24 WO PCT/EP2003/014904 patent/WO2004069450A1/de not_active Application Discontinuation
- 2003-12-24 CN CNB200380110238XA patent/CN100360259C/zh not_active Expired - Fee Related
- 2003-12-24 AU AU2003303859A patent/AU2003303859A1/en not_active Abandoned
- 2003-12-24 AT AT03815339T patent/ATE340041T1/de not_active IP Right Cessation
- 2003-12-24 KR KR1020057014422A patent/KR20050105998A/ko not_active Application Discontinuation
-
2005
- 2005-08-05 ZA ZA200506281A patent/ZA200506281B/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2004069450A1 * |
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 |
ZA200506281B (en) | 2006-04-26 |
BR0318094A (pt) | 2005-12-20 |
US20060188692A1 (en) | 2006-08-24 |
EP1590111B1 (de) | 2006-09-20 |
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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