EP1228250B1 - Gas injection stopper brick with sealing body under screw spring pressure for metallurgical vessels - Google Patents
Gas injection stopper brick with sealing body under screw spring pressure for metallurgical vessels Download PDFInfo
- Publication number
- EP1228250B1 EP1228250B1 EP00969459A EP00969459A EP1228250B1 EP 1228250 B1 EP1228250 B1 EP 1228250B1 EP 00969459 A EP00969459 A EP 00969459A EP 00969459 A EP00969459 A EP 00969459A EP 1228250 B1 EP1228250 B1 EP 1228250B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- section
- sheet metal
- supply pipe
- gas injection
- 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
Links
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/48—Bottoms or tuyéres of converters
-
- 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 with a porous, gas-permeable molded brick of refractory Material, a surrounding gastight Operaumposed, from a to the lateral peripheral surface of the Formstone extending metal jacket and one the outer Formed face of the formstone covering sheet metal lid is, and one from the bottom of the tin lid extending gas supply pipe, in the area of a sheet metal lid trained gas inlet opening with the sheet metal lid is connected and at a distance from the gas inlet opening of the Sheet metal lid has a narrowed cross section, wherein in the Pipe section between the sheet metal cover and the narrowed cross-section an at least in the axial direction of the gas supply pipe movable closure body is arranged, whose cross section smaller than the inner diameter of the gas supply pipe and greater than the narrowed cross-section and the corresponding a check valve by a supported on the sheet metal cover Helical compression spring in the direction of the one valve seat defining narrowing cross-section is loaded.
- Such a gas purging plug is known from DE 33 41 446 C1 known. With this gas purging plug can breakthroughs of Melt in the connected gas supply line as far as possible prevent or mitigate their effect.
- Gas Kunststoffstein insofar problematic as that the Gas inlet opening at high gas pressures leading to a lead to complete compression of the helical compression spring, is closed by the helical compression spring. Thus exists the danger that the gas supply just then, if a relative high gas flow rate is required, is interrupted.
- Object of the present invention is a gas purging plug of the type mentioned above, on the one hand the Danger of melting breaks minimized and the other hand a safe gas supply even at high gas flow rates with ensures a correspondingly high gas pressure.
- the solution according to the invention results in a sink that both minimizes the risk of melting breaks as well as a Gas supply from the gas supply pipe in the sink in the case of a completely compressed due to high gas pressure Ensures helical compression spring.
- Gas iststeins is characterized in that the gas inlet opening consists of three holes whose center axes each eccentric are arranged to the central axis of the gas supply pipe.
- the center axes of the holes can preferably on lie in a common circle and evenly apart be spaced.
- a further advantageous embodiment of the invention Gas iststeins is that the valve seat with the Gas supply tube is integrally formed. hereby reduces the number of interconnected Parts, what the manufacturing and storage costs for the Gas purging plug reduced accordingly.
- the sheet metal lid is plate-shaped and a Has depression, which together with the bottom of the Formstone defines a cavity.
- the depression can preferably produced by means of a suitable press become. This also allows the number of each other reduce interconnecting items.
- the gas purging plug shown in the drawing consists of a frusto-conical, gas-permeable molded block 1.
- the Gas purging plug is used to introduce purge gas, e.g. Argon, in a metallurgical vessel (not shown) Molten metal.
- the gas sink is in the ground or the wall of the metallurgical vessel installed.
- the frusto-conical shaped block 1 is in a gas-tight Partial garment bordered, the one around the lateral Peripheral surface of the molded block 1 extending metal jacket 2 and one covering the outer face of the molded block 1 Sheet metal lid 3 is welded together. It can be seen that the sheet metal lid 3 is plate-shaped and a Recess 4 has, which together with the bottom of the Formsteins 1 defines a cavity 5.
- a gas supply pipe 6 arranged in the region of a formed in the sheet metal lid 3 Gas inlet opening 7 welded to the sheet metal lid 3 is.
- the Gas supply pipe 6 At its end facing away from the sheet metal lid 3 is the Gas supply pipe 6 with an internal thread 8 for connecting a Gas line (not shown) provided.
- a Gas line (not shown) provided.
- an external thread can also be formed on the gas supply pipe 6, an external thread be.
- the gas supply pipe 6 At a distance from the gas inlet opening 7, the gas supply pipe 6 a narrowed cross-section 9, wherein in the pipe section between the sheet metal lid 3 and the narrowed Cross-section 9 a in the axial direction of the gas supply pipe. 6 movable closure body arranged in the form of a ball 10 is.
- the narrowed cross-section 9 of the gas supply pipe 6 defines a conical valve seat 11 which is integral with the Gas supply pipe 6 is formed.
- the ball 10 is corresponding to a check valve by a supported on the sheet metal lid 3 helical compression spring 12 in Direction of the valve seat 11 loaded.
- the helical compression spring 12 is dimensioned so that between the inner wall of the Gas supply pipe 6 and the spring 12, a free annular space thirteenth is available.
- the gas inlet 7 is with respect to the gas supply pipe 6 and the helical compression spring 12 arranged so that they partially outside the pitch circle of the helical compression spring 12th lies.
- the central axes of the Bores 14,15,16 lie on a common circle and are equally spaced from each other (see Fig. 2).
- the gas purging plug is preferably made in the manner that first of the frustoconical molded block 1 in the conical metal jacket 2 is shrunk. Subsequently, will the plate-shaped metal lid 3 welded to the metal jacket 2.
- the gas supply pipe 6 can already with the Helical compression spring 12 and the locking ball 10 on the Sheet metal lid 3 welded.
Abstract
Description
Die Erfindung betrifft einen Gasspülstein für metallurgische Gefäße mit einem porösen, gasdurchlässigen Formstein aus feuerfestem Material, einer diesen umgebenden gasdichten Teilumkleidung, die aus einem sich um die seitliche Umfangsfläche des Formsteins erstreckenden Blechmantel und einem die äußere Stirnfläche des Formsteins überdeckenden Blechdeckel gebildet ist, und einem sich von der Unterseite des Blechdeckels erstreckenden Gaszuführungsrohr, das im Bereich einer im Blechdeckel ausgebildeten Gaseintrittsöffnung mit dem Blechdeckel verbunden ist und im Abstand von der Gaseintrittsöffnung des Blechdeckels einen verengten Querschnitt aufweist, wobei in dem Rohrabschnitt zwischen dem Blechdeckel und dem verengten Querschnitt ein zumindest in Axialrichtung des Gaszuführungsrohres beweglicher Verschlußkörper angeordnet ist, dessen Querschnitt kleiner als der Innendurchmesser des Gaszuführungsrohres und größer als der verengte Querschnitt ist und der entsprechend einem Rückschlagventil durch eine an dem Blechdeckel abgestützte Schraubendruckfeder in Richtung des einen Ventilsitz definierenden verengten Querschnitts belastet ist. The invention relates to a gas purging plug for metallurgical Vessels with a porous, gas-permeable molded brick of refractory Material, a surrounding gastight Teilumkleidung, from a to the lateral peripheral surface of the Formstone extending metal jacket and one the outer Formed face of the formstone covering sheet metal lid is, and one from the bottom of the tin lid extending gas supply pipe, in the area of a sheet metal lid trained gas inlet opening with the sheet metal lid is connected and at a distance from the gas inlet opening of the Sheet metal lid has a narrowed cross section, wherein in the Pipe section between the sheet metal cover and the narrowed cross-section an at least in the axial direction of the gas supply pipe movable closure body is arranged, whose cross section smaller than the inner diameter of the gas supply pipe and greater than the narrowed cross-section and the corresponding a check valve by a supported on the sheet metal cover Helical compression spring in the direction of the one valve seat defining narrowing cross-section is loaded.
Ein derartiger Gasspülstein ist aus der DE 33 41 446 C1 bekannt. Mit diesem Gasspülstein lassen sich Durchbrüche der Schmelze in die angeschlossene Gaszufuhrleitung weitestgehend verhindern bzw. in ihrer Auswirkung mindern. Allerdings ist der bekannte Gasspülstein insofern problematisch, als daß die Gaseintrittsöffnung bei hohen Gasdrücken, die zu einem vollständigen Zusammenpressen der Schraubendruckfeder führen, durch die Schraubendruckfeder verschlossen ist. Somit besteht die Gefahr, daß die Gaszufuhr gerade dann, wenn ein relativ hoher Gasvolumenstrom benötigt wird, unterbrochen wird.Such a gas purging plug is known from DE 33 41 446 C1 known. With this gas purging plug can breakthroughs of Melt in the connected gas supply line as far as possible prevent or mitigate their effect. However, that is known Gasspülstein insofar problematic as that the Gas inlet opening at high gas pressures leading to a lead to complete compression of the helical compression spring, is closed by the helical compression spring. Thus exists the danger that the gas supply just then, if a relative high gas flow rate is required, is interrupted.
Aufgabe der vorliegenden Erfindung ist es, einen Gasspülstein der eingangs genannten Art zu schaffen, der einerseits die Gefahr von Schmelzendurchbrüchen minimiert und der andererseits eine sichere Gaszufuhr auch bei hohen Gasvolumenströmen mit einem entsprechend hohen Gasdruck gewährleistet.Object of the present invention is a gas purging plug of the type mentioned above, on the one hand the Danger of melting breaks minimized and the other hand a safe gas supply even at high gas flow rates with ensures a correspondingly high gas pressure.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Gaseintrittsöffnung zumindest teilweise außerhalb des Teilkreises der Druckfeder angeordnet wird wie definiert im kennreichnenden Teil des Anspruchs 1.This object is achieved in that the Gas inlet opening at least partially outside the pitch circle the compression spring is arranged as defined in identifying part of claim 1.
Die erfindungsgemäße Lösung ergibt einen Spülstein, der sowohl die Gefahr von Schmelzendurchbrüchen minimiert als auch eine Gaszufuhr vom Gaszuführungsrohr in den Spülstein im Falle einer aufgrund hohen Gasdrucks vollständig zusammengepreßten Schraubendruckfeder sicherstellt.The solution according to the invention results in a sink that both minimizes the risk of melting breaks as well as a Gas supply from the gas supply pipe in the sink in the case of a completely compressed due to high gas pressure Ensures helical compression spring.
Eine vorteilhafte Ausgestaltung des erfindungsgemäßen Gasspülsteins ist dadurch gekennzeichnet, daß die Gaseintrittsöffnung aus drei Bohrungen besteht, deren Mittelachsen jeweils exzentrisch zur Mittelachse des Gaszuführungsrohres angeordnet sind. Die Mittelachsen der Bohrungen können dabei vorzugsweise auf einem gemeinsamen Kreis liegen und voneinander gleichmäßig beabstandet sein. Hierdurch wird zum einen ein relativ großer Gesamtöffnungsquerschnitt und zum anderen ein stabiles Widerlager für die Schraubendruckfeder im Bereich der durch die Bohrungen gebildeten Gaseintrittsöffnung an dem Blechdeckel erzielt.An advantageous embodiment of the invention Gasspülsteins is characterized in that the gas inlet opening consists of three holes whose center axes each eccentric are arranged to the central axis of the gas supply pipe. The center axes of the holes can preferably on lie in a common circle and evenly apart be spaced. As a result, on the one hand, a relatively large Total opening cross section and on the other a stable Abutment for the helical compression spring in the area by the Holes formed gas inlet opening on the sheet metal lid achieved.
Eine weitere vorteilhafte Ausgestaltung des erfindungsgemäßen Gasspülsteins besteht darin, daß der Ventilsitz mit dem Gaszuführungsrohr einstückig ausgebildet ist. Hierdurch reduziert sich die Anzahl der miteinander zu verbindenden Einzelteile, was die Herstellungs- und Lagerkosten für den Gasspülstein entsprechend verringert.A further advantageous embodiment of the invention Gasspülsteins is that the valve seat with the Gas supply tube is integrally formed. hereby reduces the number of interconnected Parts, what the manufacturing and storage costs for the Gas purging plug reduced accordingly.
Nach einer weiteren bevorzugten Ausgestaltung ist vorgesehen, daß der Blechdeckel tellerförmig ausgebildet ist und eine Vertiefung aufweist, die zusammen mit der Unterseite des Formsteins einen Hohlraum definiert. Die Vertiefung kann vorzugsweise mittels einer geeigneten Presse hergestellt werden. Auch hierdurch läßt sich die Anzahl der miteinander zu verbindenden Einzelteile verringern.According to another preferred embodiment, it is provided that the sheet metal lid is plate-shaped and a Has depression, which together with the bottom of the Formstone defines a cavity. The depression can preferably produced by means of a suitable press become. This also allows the number of each other reduce interconnecting items.
Weitere bevorzugte und vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.Further preferred and advantageous embodiments of Invention are specified in the subclaims.
Nachfolgend wird die Erfindung anhand einer ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert. Im einzelnen zeigen:
- Fig. 1
- eine Querschnittansicht auf einen erfindungsgemäßen Gasspülstein mit einem Formstein aus feuerfestem Material, und
- Fig. 2
- eine Draufsicht auf den Gasspülstein gemäß Fig. 1, wobei der Formstein der Übersichlichkeit halber weggelassen ist.
- Fig. 1
- a cross-sectional view of a gas purging plug according to the invention with a shaped brick of refractory material, and
- Fig. 2
- a plan view of the gas purging plug of FIG. 1, wherein the molded block is omitted for the sake of clarity.
Der in der Zeichnung dargestellte Gasspülstein besteht aus einem kegelstumpfförmigen, gasdurchlässigen Formstein 1. Der Gasspülstein dient der Einleitung von Spülgas, wie z.B. Argon, in eine in einem metallurgischen Gefäß (nicht gezeigt) befindliche Metallschmelze. Hierzu wird der Gasspülstein in den Boden oder die Wand des metallurgischen Gefässes eingebaut.The gas purging plug shown in the drawing consists of a frusto-conical, gas-permeable molded block 1. The Gas purging plug is used to introduce purge gas, e.g. Argon, in a metallurgical vessel (not shown) Molten metal. For this purpose, the gas sink is in the ground or the wall of the metallurgical vessel installed.
Der kegelstumpfförmige Formstein 1 ist in einer gasdichten
Teilumkleidung eingefaßt, die aus einem sich um die seitliche
Umfangsfläche des Formsteins 1 erstreckenden Blechmantel 2 und
einem die äußere Stirnfläche des Formsteins 1 überdeckenden
Blechdeckel 3 zusammengeschweißt ist. Es ist zu erkennen, daß
der Blechdeckel 3 tellerförmig ausgebildet ist und eine
Vertiefung 4 aufweist, die zusammen mit der Unterseite des
Formsteins 1 einen Hohlraum 5 definiert.The frusto-conical shaped block 1 is in a gas-tight
Partial garment bordered, the one around the lateral
Peripheral surface of the molded block 1 extending
An der Unterseite des Blechdeckels 3 ist ein Gaszuführungsrohr
6 angeordnet, das im Bereich einer im Blechdeckel 3 ausgebildeten
Gaseintrittsöffnung 7 mit dem Blechdeckel 3 verschweißt
ist. An seinem dem Blechdeckel 3 abgewandten Ende ist das
Gaszuführungsrohr 6 mit einem Innengewinde 8 zum Anschluß einer
Gasleitung (nicht gezeigt) versehen. Alternativ oder zusätzlich
kann an dem Gaszuführungsrohr 6 auch ein Außengewinde ausgebildet
sein.At the bottom of the
Im Abstand von der Gaseintrittsöffnung 7 weist das Gaszuführungsrohr
6 einen verengten Querschnitt 9 auf, wobei in
dem Rohrabschnitt zwischen dem Blechdeckel 3 und dem verengten
Querschnitt 9 ein in Axialrichtung des Gaszuführungsrohres 6
beweglicher Verschlußkörper in Form einer Kugel 10 angeordnet
ist. Der verengte Querschnitt 9 des Gaszuführungsrohres 6
definiert einen konischen Ventilsitz 11, der einstückig mit dem
Gaszuführungsrohr 6 ausgebildet ist.At a distance from the gas inlet opening 7, the gas supply pipe
6 a narrowed
Die Kugel 10 ist entsprechend einem Rückschlagventil durch eine
an dem Blechdeckel 3 abgestützte Schraubendruckfeder 12 in
Richtung des Ventilsitzes 11 belastet. Die Schraubendruckfeder
12 ist so dimensioniert, daß zwischen der Innenwandung des
Gaszuführungsrohr 6 und der Feder 12 ein freier Ringraum 13
vorhanden ist. The
Die Gaseintrittsöffnung 7 ist in bezug auf das Gaszuführungsrohr
6 und die Schraubendruckfeder 12 so angeordnet, daß sie
teilweise außerhalb des Teilkreises der Schraubendruckfeder 12
liegt. In dem gezeigten Ausführungsbeispiel besteht die
Gaseintrittsöffnung 7 aus drei Bohrungen 14,15,16, deren
Mittelachsen jeweils exzentrisch zur Mittelachse des
Gaszuführungsrohres 6 angeordnet sind. Die Mittelachsen der
Bohrungen 14,15,16 liegen dabei auf einem gemeinsamen Kreis und
sind voneinander gleichmäßig beabstandet (vgl. Fig. 2).The
Der Gasspülstein wird vorzugsweise in der Weise hergestellt,
daß zunächst der kegelstumpfförmige Formstein 1 in den
konischen Blechmantel 2 eingeschrumpft wird. Anschließend wird
der tellerförmige Blechdeckel 3 mit dem Blechmantel 2 verschweißt.
Das Gaszuführungsrohr 6 kann dabei bereits mit der
Schraubendruckfeder 12 sowie der Verschlußkugel 10 an dem
Blechdeckel 3 angeschweißt sein. The gas purging plug is preferably made in the manner
that first of the frustoconical molded block 1 in the
- 11
- Formsteincast stone
- 22
- Blechmantelsheet metal jacket
- 33
- Blechdeckelsheet metal lid
- 44
- Vertiefungdeepening
- 55
- Hohlraumcavity
- 66
- GaszuführungsrohrGas supply pipe
- 77
- GaseintrittsöffnungGas inlet opening
- 88th
- Innengewindeinner thread
- 99
- verengter Querschnittnarrowed cross-section
- 1010
- Kugel (Verschlußkörper)Ball (closure body)
- 1111
- konischer Ventilsitzconical valve seat
- 1212
- SchraubendruckfederHelical compression spring
- 1313
- Ringraumannulus
- 1414
- Bohrungdrilling
- 1515
- Bohrungdrilling
- 1616
- Bohrungdrilling
Claims (10)
- A gas injection brick for metallurgical vessels with a porous, gas-permeable shaped stone (1) made of a fireproof material, enveloped by a gastight partial cladding, formed by a sheet jacket (2) that extends around the circumferential side surface of the shaped stone and a sheet cover (3) that covers the outer face of the shaped stone, and a gas supply pipe (6) that extends from the lower side of the sheet cover, which is connected with the sheet cover in the area of a gas inlet opening (7) incorporated in the sheet cover and has a narrowed cross section (9) a distance from the gas inlet opening of the sheet cover, wherein a sealing element (10) that can move at least in the axial direction of the gas supply pipe is arranged in the pipe section between the sheet cover (3) and the narrowed cross section, has a cross section smaller than the inner diameter of the gas supply pipe (6) and larger than the narrowed cross section, and, acting as a check valve, is loaded toward the narrowed cross section defining a valve seat (11) by a screw pressure spring (12), characterized in that a free annular space (13) is provided between the inner wall of the gas supply pipe (6) and the screw pressure spring (12), and that the cross section of the gas inlet opening (7) at least partially overlaps the cross section of the free annular space (13).
- The gas injection brick according to claim 1, characterized in that the gas inlet opening (7) consists of several boreholes (14, 15, 16), whose middle axes are each arranged eccentrically to the middle axis of the gas supply pipe (6).
- The gas injection brick according to claim 1 or 2, characterized in that the gas inlet opening (7) consists of three boreholes (14, 15, 16), whose middle axes are each arranged eccentrically to the middle axis of the gas supply pipe (6).
- The gas injection brick according to one of claims 2 or 3, characterized in that the middle axes of the boreholes (14, 15, 16) lie on the same circle, and are spaced uniformly apart.
- The gas injection brick according to one of claims 1 to 4, characterized in that the sealing element is a ball (10).
- The gas injection brick according to one of claims 1 to 5, characterized in that the valve seat (11) is integrally formed with the gas supply pipe (6).
- The gas injection brick according to one of claims 1 to 6, characterized in that the valve seat (11) is conical.
- The gas injection brick according to one of claims 1 to 7, characterized in that the shaped stone (1) is a truncated cone, and shrunk into the correspondingly conical sheet jacket (2).
- The gas injection brick according to one of claims 1 to 8, characterized in that the sheet cover (3) is plate-shaped, and has a recess (4) that, together with the lower side of the shaped stone (1), defines a hollow space (5).
- The gas injection brick according to one of claims 1 to 9, characterized in that the end of the gas supply pipe (6) facing away from the sheet cover (3) is provided with a female thread (8) and/or male thread for connecting a gas line.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19948848 | 1999-10-08 | ||
| DE19948848A DE19948848C1 (en) | 1999-10-08 | 1999-10-08 | Nozzle brick for injecting flushing gas into molten metal in a metallurgical vessel has a gas entry opening located at least partially outside the pitch circle of a biasing spring of a non-return valve within a gas supply pipe |
| PCT/EP2000/009875 WO2001027337A1 (en) | 1999-10-08 | 2000-10-09 | Gas stopper brick for metallurgical vessels with a sealing body that is subject to screw pressure springs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1228250A1 EP1228250A1 (en) | 2002-08-07 |
| EP1228250B1 true EP1228250B1 (en) | 2005-01-19 |
Family
ID=7925176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00969459A Expired - Lifetime EP1228250B1 (en) | 1999-10-08 | 2000-10-09 | Gas injection stopper brick with sealing body under screw spring pressure for metallurgical vessels |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US6797230B1 (en) |
| EP (1) | EP1228250B1 (en) |
| AT (1) | ATE287454T1 (en) |
| AU (1) | AU7916800A (en) |
| DE (2) | DE19948848C1 (en) |
| ES (1) | ES2235962T3 (en) |
| TW (1) | TW533241B (en) |
| WO (1) | WO2001027337A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202009005034U1 (en) | 2009-04-06 | 2009-09-24 | Calderys Deutschland Gmbh & Co. Ohg | High-temperature check valve for gas flushing |
| HUE029621T2 (en) * | 2012-08-27 | 2017-03-28 | Refractory Intellectual Property Gmbh & Co Kg | Gas purging element with its corresponding gas supply line |
| MX2015016794A (en) * | 2013-06-07 | 2016-03-31 | Vesuvius Crucible Co | Lead retaining purge plug. |
| PL2893992T3 (en) * | 2014-01-09 | 2016-06-30 | Refractory Intellectual Property Gmbh & Co Kg | Gas flushing element and associated gas connection element |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE679723C (en) | 1935-01-16 | 1939-08-12 | Metallgesellschaft Akt Ges | Device for the continuous splitting of fats or oils |
| DE3341446C1 (en) * | 1983-11-17 | 1985-07-11 | Brohltal-Deumag AG für feuerfeste Erzeugnisse, 5401 Urmitz | Gas flushing stone for metallurgical vessels |
| DE4411538C1 (en) * | 1994-04-02 | 1995-12-14 | Didier Werke Ag | Method for producing a gas and / or solid-state blowing device for metallurgical vessels, and blowing device produced according to the method |
-
1999
- 1999-10-08 DE DE19948848A patent/DE19948848C1/en not_active Expired - Lifetime
-
2000
- 2000-10-09 EP EP00969459A patent/EP1228250B1/en not_active Expired - Lifetime
- 2000-10-09 WO PCT/EP2000/009875 patent/WO2001027337A1/en active IP Right Grant
- 2000-10-09 AU AU79168/00A patent/AU7916800A/en not_active Abandoned
- 2000-10-09 ES ES00969459T patent/ES2235962T3/en not_active Expired - Lifetime
- 2000-10-09 US US10/110,104 patent/US6797230B1/en not_active Expired - Lifetime
- 2000-10-09 AT AT00969459T patent/ATE287454T1/en active
- 2000-10-09 DE DE50009303T patent/DE50009303D1/en not_active Expired - Lifetime
- 2000-11-27 TW TW089121156A patent/TW533241B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| AU7916800A (en) | 2001-04-23 |
| DE19948848C1 (en) | 2000-07-13 |
| EP1228250A1 (en) | 2002-08-07 |
| ATE287454T1 (en) | 2005-02-15 |
| ES2235962T3 (en) | 2005-07-16 |
| US6797230B1 (en) | 2004-09-28 |
| TW533241B (en) | 2003-05-21 |
| DE50009303D1 (en) | 2005-02-24 |
| WO2001027337A1 (en) | 2001-04-19 |
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