EP0204076A2 - Arrangement of a sleeve for the injection of gases or solids into a ladle containing a metallurgical melt - Google Patents
Arrangement of a sleeve for the injection of gases or solids into a ladle containing a metallurgical melt Download PDFInfo
- Publication number
- EP0204076A2 EP0204076A2 EP86102833A EP86102833A EP0204076A2 EP 0204076 A2 EP0204076 A2 EP 0204076A2 EP 86102833 A EP86102833 A EP 86102833A EP 86102833 A EP86102833 A EP 86102833A EP 0204076 A2 EP0204076 A2 EP 0204076A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- sleeve
- opening
- perforated brick
- conical
- arrangement 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
- 239000007789 gas Substances 0.000 title claims abstract description 5
- 239000007787 solid Substances 0.000 title claims abstract description 5
- 238000002347 injection Methods 0.000 title abstract 2
- 239000007924 injection Substances 0.000 title abstract 2
- 239000011470 perforated brick Substances 0.000 claims abstract description 26
- 239000002184 metal Substances 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000007664 blowing Methods 0.000 claims abstract description 4
- 239000004570 mortar (masonry) Substances 0.000 claims description 7
- 238000005245 sintering Methods 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000004140 cleaning Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
-
- 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 sleeve arrangement for blowing gases or solids into a pan containing molten metal, e.g. in the area of a sliding closure, the sleeve of which essentially has the shape of a truncated cone provided with a flow channel and which is to be inserted into a perforated brick of the pan wall with a conical opening.
- the object of the present invention is therefore to propose a sleeve arrangement of the type mentioned at the outset in which a faster setting and replacement of the sleeve can be achieved with great accuracy of the sleeve seat.
- the conical outer surface of the sleeve and the conical inner surface of the opening of the perforated brick have a corresponding slope for self-locking fit, preferably of 5 and that the conical inner surface of the opening of the perforated brick is lined with a sheet metal jacket of low material thickness of the same pitch is. This ensures a quick and clean, since mortar-free changing in the relatively hot state with a precise fit of each subsequent sleeve with great security and with little cleaning effort.
- a good and firm connection of the sheet metal jacket to the perforated brick can be guaranteed in that the sheet metal jacket is permanently fixed in the opening of the perforated brick with a mortar having a low sintering temperature.
- the sheet metal jacket has a material thickness in the range between 0.6 and 1 mm, preferably around 0.8 mm, an extraordinarily precise fit of the sleeve is ensured while normal tolerance deviations of the perforated brick are compensated for.
- the sheet metal jacket should be made with a tolerance of about 0.1 mm.
- An adapter for a pull-out device at the outer end of the sleeve means that the sleeve can be changed quickly and cleanly.
- the single figure illustrates in vertical section an embodiment of a sleeve arrangement having the invention.
- the sleeve arrangement 1 consists essentially of a sleeve 2 and a perforated brick 6.
- the sleeve 2 has a flow channel 7 concentric with the central longitudinal axis for blowing in gases or solids.
- the sleeve 2 is frustoconical on the outside.
- An opening 8 of the perforated brick 6, into which the sleeve 2 is to be inserted, is correspondingly conical.
- the conical lateral surface 9 of the sleeve 2 and the conical inner surface of the opening 8 of the perforated brick 6 have a slope of exactly or essentially 5 °, the tapered part of the sleeve 2 pointing towards the interior of the molten metal pan, the wall of the perforated brick 6 being a component .
- a sheet metal jacket 4 of low material thickness is inserted into the opening 8.
- the sheet metal jacket 4 has the same slope or conicity as the inner surface 10 of the opening 8 of the perforated brick 6 and the lateral surface 9 of the sleeve 2.
- the sheet metal jacket 4 is permanently fixed in the opening of the perforated brick 6 with a mortar 3 of low sintering temperature.
- the latter has an adapter 5 on the end face of its expanded outer end for the engagement of a pull-out device.
- the adapter 5 is arranged concentrically to the flow channel 7 in the case shown and delimits part of the same.
- the insertion and extraction movement of the sleeve 2 is illustrated in the drawing with a double arrow.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Furnace Charging Or Discharging (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Laminated Bodies (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Thermal Insulation (AREA)
Abstract
Die Erfindung bezieht sich auf ein Hülsenanordnung zum Einblasen von Gasen oder Feststoffen in eine Metallschmelze enthaltende Pfanne, z.B. im Bereich eines Schiebeverschlusses, dessen Hülse im wesentlichen die Form eines mit Durchflußkanal versehenen Kegelstumpfes hat und welche in einen Lochstein der Pfannenwandung mit konischer Öffnung einzusetzen ist. Um ein schnelleres und sicheres Setzen und Auswechseln der Hülse zu gewährleisten, ist erfindungsgemäß vorgesehen, daß die konische Mantelfläche der Hülse und die konische Innenfläche der Öffnung des Lochsteines eine übereinstimmende Steigung für selbsthemmenden Sitz, vorzugsweise von 5° haben und daß die konische Innenfläche der Öffnung des Lochsteins mit einem Blechmantel geringer Materialstärke gleicher Steigung ausgekleidet ist. Der Erfindungsgedanke läßt sich auch bei anderen als Einblashülsen vorteilhaft einsetzen.The invention relates to a sleeve assembly for blowing gases or solids into a ladle containing molten metal, e.g. in the area of a sliding closure, the sleeve of which essentially has the shape of a truncated cone provided with a flow channel and which is to be inserted into a perforated brick of the pan wall with a conical opening. In order to ensure a faster and safer setting and replacement of the sleeve, the invention provides that the conical outer surface of the sleeve and the conical inner surface of the opening of the perforated brick have a matching slope for a self-locking fit, preferably of 5 °, and that the conical inner surface of the opening of the perforated brick is lined with a sheet metal jacket of low material thickness of the same pitch. The idea of the invention can also be used advantageously in other than injection sleeves.
Description
Die Erfindung bezieht sich auf eine Hülsenanordnung zum Einblasen von Gasen oder Feststoffen in eine Metallschmelze enthaltende Pfanne, z.B. im Bereich eines Schiebeverschlusses, dessen Hülse im wesentlichen die Form eines mit Durchflußkanal versehenen Kegelstumpfes hat und welche in einen Lochstein der Pfannenwandung mit konischer öffnung einzusetzen ist.The invention relates to a sleeve arrangement for blowing gases or solids into a pan containing molten metal, e.g. in the area of a sliding closure, the sleeve of which essentially has the shape of a truncated cone provided with a flow channel and which is to be inserted into a perforated brick of the pan wall with a conical opening.
Bei Hülsenanordnungen dieser Art müssen die Hülsen bisher mit Mörtel gesetzt werden. Dies bedeutet zusätzlichen Material- und großen Zeitaufwand. Beim Austausch einer verschlissenen Hülse gegen eine neue sind ferner unangenehme Reinigungsarbeiten der konischen Öffnung des Lochsteins bei großer Hitzeeinwirkung auszuführen. Das Setzen der Hülse mittels Mörtel hat ferner Ungenauigkeiten des Sitzes der Hülse zur Folge.In the case of sleeve arrangements of this type, the sleeves had previously been placed with mortar. This means additional material and a lot of time. When replacing a worn sleeve with a new one, unpleasant cleaning work must also be carried out on the conical opening of the perforated brick when exposed to high temperatures. The setting of the sleeve by means of mortar also results in inaccuracies in the seating of the sleeve.
Aufgabe der vorliegenden Erfindung ist es daher, eine Hülsenanordnung der eingangs genannten Art vorzuschlagen, bei welcher ein schnelleres Setzen und Auswechseln der Hülse bei großer Genauigkeit des Hülsensitzes erreicht werden kann.The object of the present invention is therefore to propose a sleeve arrangement of the type mentioned at the outset in which a faster setting and replacement of the sleeve can be achieved with great accuracy of the sleeve seat.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die konische Mantelfläche der Hülse und die konische Innenfläche der öffnung des Lochsteines eine übereinstimmende Steigung für selbsthemmenden Sitz, vorzugsweise von 5. haben und daß die konische Innenfläche der öffnung des Lochsteines mit einem Blechmantel geringer Materialstärke gleicher Steigung ausgekleidet ist. Dies gewährleistet ein schnelles und sauberes, da mörtelfreies Wechseln im relativ heißen Zustand bei genauem Sitz jeder nachgesetzten Hülse mit großer Sicherheit und mit nur geringem Reinigungsaufwand.This object is achieved in that the conical outer surface of the sleeve and the conical inner surface of the opening of the perforated brick have a corresponding slope for self-locking fit, preferably of 5 and that the conical inner surface of the opening of the perforated brick is lined with a sheet metal jacket of low material thickness of the same pitch is. This ensures a quick and clean, since mortar-free changing in the relatively hot state with a precise fit of each subsequent sleeve with great security and with little cleaning effort.
Ersichtlich ist der Erfindungsgedanke auch bei anderen als Einblashülsen, also beispielsweise auch bei Schieberhülsen oder sonstigen Hülsen anwendbar, die bisher lediglich mit Mörtel gesetzt werden konnten.Obviously, the idea of the invention can also be used with other than blow-in sleeves, for example also with slide sleeves or other sleeves that could previously only be set with mortar.
Die Wahl der Steigung des Konus von Lochsteinöffnung und Hülsenform gewährleistet eine Selbsthaftung. Die Auskleidung der Lochsteinöffnung mit einem Blechmantel garantiert einen genauen Sitz, wobei normale Toleranzabweichungen des Lochsteines ausgeglichen werden. Zum Wechseln einer verbrauchten Hülse braucht diese lediglich aus dem Lochstein herausgezogen und an ihrer Stelle eine neue Hülse eingesetzt zu werden. Durch den weitgehenden Wegfall der Reinigungsarbeiten wird eine erhebliche Arbeitsersparnis erzielt; durch die Verkürzung der Auswechselzeit erhöht sich gleichzeitig die Verfügbarkeit der Pfanne, wodurch die wirtschaftliche Bedeutung der erfindungsgemäßen Hülseanordnung sich über die bloße Material- und Zeitersparnis beim Setzen und Auswechseln der Hülse noch erhöht. Insbesondere bei basisch zugestellten Pfannen kommen die mit der Erfindung erzielten Vorteile besonders zum Tragen, aber auch bei allen anderen Pfannenzustellungsarten.The choice of the slope of the cone of perforated brick opening and sleeve shape ensures self-adhesion. The lining of the perforated brick opening with a sheet metal jacket guarantees an exact fit, whereby normal tolerance deviations of the perforated brick are compensated for. To change a used sleeve, it only needs to be pulled out of the perforated brick and a new sleeve inserted in its place. Considerable labor savings are achieved by largely eliminating the cleaning work; by shortening the exchange time, the availability of the pan increases at the same time, which increases the economic importance of the sleeve arrangement according to the invention by the mere saving of material and time when inserting and replacing the sleeve. The advantages achieved with the invention are particularly noticeable in the case of basin-fed pans, but also in all other types of pan delivery.
Eine gute und feste Verbindung des Blechmantels mit dem Lochstein kann gemäß einem weiteren Erfindungsmerkmal dadurch garantiert werden, daß der Blechmantel in der öffnung des Lochsteins dauerhaft mit einem Mörtel niedriger Sintertemperatur festgelegt ist.According to a further feature of the invention, a good and firm connection of the sheet metal jacket to the perforated brick can be guaranteed in that the sheet metal jacket is permanently fixed in the opening of the perforated brick with a mortar having a low sintering temperature.
Wenn der Blechmantel eine Materialstärke im Berreich zwischen 0,6 und 1 mm, vorzugsweise bei etwa 0,8 mm hat, wird ein außerordentlich genauer Sitz der Hülse bei Ausgleich normaler Toleranzabweichungen des Lochsteins gewährleistet.If the sheet metal jacket has a material thickness in the range between 0.6 and 1 mm, preferably around 0.8 mm, an extraordinarily precise fit of the sleeve is ensured while normal tolerance deviations of the perforated brick are compensated for.
Der Blechmantel sollte mit einer Toleranz bei etwa 0,1 mm gefertigt sein.The sheet metal jacket should be made with a tolerance of about 0.1 mm.
Wenn die Toleranz der Außenabmessungen der Hülse und der öffnung des Lochsteines bei etwa 0,5 mm liegen, kann ein fast 100%-ig genauer Sitz jeder Hülse erreicht werden.If the tolerance of the outer dimensions of the sleeve and the opening of the perforated brick is approximately 0.5 mm, an almost 100% accurate fit of each sleeve can be achieved.
Um das Herausziehen der Hülse nach Gebrauch zu erleichtern, wird im Rahmen einer Weiterbildung der Erfindung ferner vorgeschlagen, die Mantelfläche der Hülse mit einer Wasserglas-Graphit-Schlemme einzustreichen.In order to make it easier to pull out the sleeve after use, it is further proposed within the scope of a further development of the invention to coat the outer surface of the sleeve with a water glass graphite clip.
Ein Adapter für eine Ausziehvorrichtung am äußeren Ende der Hülse führt dazu, daß die Hülse schnell und sauber gewechselt werden kann.An adapter for a pull-out device at the outer end of the sleeve means that the sleeve can be changed quickly and cleanly.
Weitere Ziele, Merkmale, Vorteile und Anwendungsmöglichkeiten der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels anhand der beiliegenden Zeichnung. Dabei bilden alle beschriebenen und/oder bildlich dargestellten Merkmale für sich oder in beliebiger sinnvoller Kombination den Gegenstand der vorliegenden Erfindung, auch unabhängig von ihrer Zusammenfassung in den Ansprüchen oder deren Rückbeziehung.Further objectives, features, advantages and possible uses of the present invention result from the following description of an exemplary embodiment with reference to the accompanying drawing. All of the described and / or illustrated features, alone or in any meaningful combination, form the subject matter of the present invention, regardless of how they are summarized in the claims or their relationship.
Die einzige Figur veranschaulicht im Vertikalschnitt eine Ausführungsform einer die Erfindung aufweisenden Hülsenanordnung.The single figure illustrates in vertical section an embodiment of a sleeve arrangement having the invention.
Die Hülsenanordnung 1 besteht im wesentlichen aus einer Hülse 2 und einem Lochstein 6. Die Hülse 2 hat zum Einblasen von Gasen oder Feststoffen einen zur Mittellängsachse konzentrischen Durchflußkanal 7. Die Hülse 2 ist außen kegelstumpfförmig. Eine Öffnung 8 des Lochsteines 6, in welche die Hülse 2 einzusetzen ist, ist entsprechend konisch ausgebildet. Die konische Mantelfläche 9 der Hülse 2 und die konische Innenfläche der Öffnung 8 des Lochsteines 6 haben erfindungsgemäß eine Steigung von genau oder im wesentlichen 5°, wobei der verjüngte Teil der Hülse 2 zum Innenraum der Metallschmelzepfanne weist, deren Wandung der Lochstein 6 ein Bestandteil ist. In die Öffnung 8 ist ein Blechmantel 4 geringer Materialstärke eingesetzt. Der Blechmantel 4 hat die gleiche Steigung bzw. Konizität wie die Innenfläche 10 der Öffnung 8 des Lochsteines 6 und die Mantelfläche 9 der Hülse 2. Der Blechmantel 4 ist in der Öffnung des Lochsteines 6 dauerhaft mit einem Mörtel 3 niedriger Sintertemperatur festgelegt. Zur Erleichterung des Auswechselns der Hülse 2 weist diese an der Stirnfläche ihres erweiterten äußeren Endes einen Adapter 5 für den Angriff einer Ausziehvorrichtung auf. Der Adapter 5 ist in dem dargestellten Fall konzentrisch zu dem Durchflußkanal 7 angeordnet und begrenzt einen Teil desselben. Die Einsetz-und Ausziehbewegung der Hülse 2 ist in der Zeichnung mit einem Doppelpfeil veranschaulicht.The sleeve arrangement 1 consists essentially of a
Erprobungen haben gezeigt, daß die normale Wechselzeit mit Hilfe der erfindungsgemäßen Hülsenanordnung von bisher etwa 30 Minuten auf 10 Minuten, also um 200 % reduziert werden kann. Außerdem hat sich die praktische Sicherheit der erfindungsgemäßen Hülsenanordnung bestätigt: Keinerlei Stahlinfiltrationen wurden bei der Erprobung an einer 270t-Pfanne festgestellt.Tests have shown that the normal changeover time can be reduced from about 30 minutes to 10 minutes, ie by 200%, using the sleeve arrangement according to the invention. In addition, the practical safety of the sleeve arrangement according to the invention has been confirmed: no steel infiltration was found during testing on a 270t pan.
- 1 Hülsenanordnung1 sleeve arrangement
- 2 Hülse2 sleeve
- 3 Mörtel3 mortar
- 4 Blechmantel4 sheet metal jacket
- 5 Adapter5 adapters
- 6 Lochstein6 perforated stone
- 7 Durchflußkanal7 flow channel
- 8 Öffnung8 opening
- 9 Mantelfläche9 lateral surface
- 10 Innenfläche10 inner surface
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT86102833T ATE45595T1 (en) | 1985-06-05 | 1986-03-04 | SLEEVE ASSEMBLY FOR INJECTING GASES OR SOLIDS INTO A LADLE CONTAINING MOLTEN METAL. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3520207 | 1985-06-05 | ||
| DE19853520207 DE3520207A1 (en) | 1985-06-05 | 1985-06-05 | NOZZLE ARRANGEMENT FOR INJECTING GASES OR SOLIDS INTO A PAN CONTAINING A METAL MELT |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0204076A2 true EP0204076A2 (en) | 1986-12-10 |
| EP0204076A3 EP0204076A3 (en) | 1987-09-16 |
| EP0204076B1 EP0204076B1 (en) | 1989-08-16 |
Family
ID=6272541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP86102833A Expired EP0204076B1 (en) | 1985-06-05 | 1986-03-04 | Arrangement of a sleeve for the injection of gases or solids into a ladle containing a metallurgical melt |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US4709905A (en) |
| EP (1) | EP0204076B1 (en) |
| JP (1) | JPS61279611A (en) |
| KR (1) | KR870000121A (en) |
| CN (1) | CN86102836A (en) |
| AT (1) | ATE45595T1 (en) |
| BR (1) | BR8602372A (en) |
| CA (1) | CA1266970A (en) |
| DE (1) | DE3520207A1 (en) |
| ES (1) | ES296706Y (en) |
| IL (1) | IL78680A0 (en) |
| ZA (1) | ZA862540B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2629101A1 (en) * | 1988-03-23 | 1989-09-29 | Radex Heraklin Industriebeteil | BRICK FOR THE INTRODUCTION OF GASES OR REACTION PRODUCTS IN A METALLURGICAL CASTING CONTAINER |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3716388C1 (en) * | 1987-05-15 | 1988-10-27 | Radex Deutschland Ag | Gas flushing stone |
| DE3717840A1 (en) * | 1987-05-27 | 1988-12-15 | Radex Deutschland Ag | FIREPROOF CERAMIC MOLDED BODY |
| DE3907887A1 (en) * | 1988-03-23 | 1989-10-26 | Radex Heraklith | Bubble brick |
| US4840356A (en) * | 1988-06-13 | 1989-06-20 | Labate Michael D | Externally replaceable stirring plug for molten metal vessels |
| DE19508849C2 (en) * | 1995-03-11 | 1997-03-06 | Lorenz Doetsch | Flush for metallurgical vessels |
| DE19748389C2 (en) * | 1997-11-03 | 2002-06-27 | Plibrico Gmbh | Feststoffspüler |
| JP4351715B2 (en) * | 2007-09-10 | 2009-10-28 | 新日本製鐵株式会社 | Tuna structure of melting furnace |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3610602A (en) * | 1969-10-14 | 1971-10-05 | United States Steel Corp | Gas-permeable refractory plug and method |
| GB1588636A (en) * | 1977-07-06 | 1981-04-29 | Daishin Kako Co Ltd | Ladle having releasable refractory nozzle |
| GB2115539A (en) * | 1982-02-24 | 1983-09-07 | Didier Werke Ag | Devices for introducing gases into metallurgical vessels |
| EP0137961A1 (en) * | 1983-08-20 | 1985-04-24 | Radex Deutschland Aktiengesellschaft für feuerfeste Erzeugnisse | Withdrawing device for a gas bubbling plug |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1031504A (en) * | 1957-09-09 | 1953-06-24 | Air Liquide | Device for blowing gas into a mass of molten metal |
| DE3206499C1 (en) * | 1982-02-24 | 1988-03-03 | Didier-Werke Ag, 6200 Wiesbaden | Apparatus for introduction of gases into metallurgical vessels |
-
1985
- 1985-06-05 DE DE19853520207 patent/DE3520207A1/en active Granted
-
1986
- 1986-03-04 EP EP86102833A patent/EP0204076B1/en not_active Expired
- 1986-03-04 AT AT86102833T patent/ATE45595T1/en active
- 1986-04-04 ZA ZA862540A patent/ZA862540B/en unknown
- 1986-04-25 CN CN198686102836A patent/CN86102836A/en active Pending
- 1986-04-30 US US06/857,538 patent/US4709905A/en not_active Expired - Fee Related
- 1986-05-05 IL IL78680A patent/IL78680A0/en unknown
- 1986-05-20 CA CA000509474A patent/CA1266970A/en not_active Expired - Fee Related
- 1986-05-23 BR BR8602372A patent/BR8602372A/en unknown
- 1986-05-30 ES ES1986296706U patent/ES296706Y/en not_active Expired
- 1986-06-04 JP JP61128309A patent/JPS61279611A/en active Pending
- 1986-06-04 KR KR1019860004436A patent/KR870000121A/en not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3610602A (en) * | 1969-10-14 | 1971-10-05 | United States Steel Corp | Gas-permeable refractory plug and method |
| GB1588636A (en) * | 1977-07-06 | 1981-04-29 | Daishin Kako Co Ltd | Ladle having releasable refractory nozzle |
| GB2115539A (en) * | 1982-02-24 | 1983-09-07 | Didier Werke Ag | Devices for introducing gases into metallurgical vessels |
| EP0137961A1 (en) * | 1983-08-20 | 1985-04-24 | Radex Deutschland Aktiengesellschaft für feuerfeste Erzeugnisse | Withdrawing device for a gas bubbling plug |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2629101A1 (en) * | 1988-03-23 | 1989-09-29 | Radex Heraklin Industriebeteil | BRICK FOR THE INTRODUCTION OF GASES OR REACTION PRODUCTS IN A METALLURGICAL CASTING CONTAINER |
| BE1003020A3 (en) * | 1988-03-23 | 1991-10-29 | Radex Heraklith | BRICK FOR THE INTRODUCTION OF GASES OR REACTION PRODUCTS INTO A CONTAINER FOR METALLURGICAL CASTING. |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61279611A (en) | 1986-12-10 |
| KR870000121A (en) | 1987-02-16 |
| ZA862540B (en) | 1986-11-26 |
| IL78680A0 (en) | 1986-08-31 |
| ES296706Y (en) | 1988-11-01 |
| ATE45595T1 (en) | 1989-09-15 |
| ES296706U (en) | 1987-12-16 |
| DE3520207C2 (en) | 1987-04-09 |
| US4709905A (en) | 1987-12-01 |
| EP0204076A3 (en) | 1987-09-16 |
| CN86102836A (en) | 1986-12-03 |
| BR8602372A (en) | 1987-01-21 |
| EP0204076B1 (en) | 1989-08-16 |
| CA1266970A (en) | 1990-03-27 |
| DE3520207A1 (en) | 1986-12-11 |
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