EP0261365B1 - Immersion lance - Google Patents
Immersion lance Download PDFInfo
- Publication number
- EP0261365B1 EP0261365B1 EP87111378A EP87111378A EP0261365B1 EP 0261365 B1 EP0261365 B1 EP 0261365B1 EP 87111378 A EP87111378 A EP 87111378A EP 87111378 A EP87111378 A EP 87111378A EP 0261365 B1 EP0261365 B1 EP 0261365B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inner tube
- ribbed
- immersion lance
- lance according
- jacketing
- 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
- 238000007654 immersion Methods 0.000 title claims description 14
- 239000002184 metal Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 5
- 239000011819 refractory material Substances 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910000805 Pig iron Inorganic materials 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 206010016322 Feeling abnormal Diseases 0.000 claims 1
- 229910001338 liquidmetal Inorganic materials 0.000 claims 1
- 230000000717 retained effect Effects 0.000 claims 1
- 230000009189 diving Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 241001061824 Plagopterus argentissimus Species 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011214 refractory ceramic Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000161 steel melt Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- C21C5/4606—Lances or injectors
- C21C5/4613—Refractory coated lances; Immersion lances
-
- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/08—Manufacture of cast-iron
Definitions
- the invention relates to an immersion lance for introducing treatment media, such as gases, in particular inert gases and / or carrier gases, with which solids, such as slag-forming substances, carbon or the like, are transported into a container filled with metal, in particular for the treatment of pig iron or steel.
- treatment media such as gases, in particular inert gases and / or carrier gases, with which solids, such as slag-forming substances, carbon or the like, are transported into a container filled with metal, in particular for the treatment of pig iron or steel.
- the immersion lance consists of a metal inner tube for the supply of the medium and a refractory monolithic ceramic jacket, which is held by means of a reinforcement attached to the inner tube, and one or more outlet openings penetrating the jacket.
- Immersion lances of this type are known in diverse forms and are used for mixing steel melts, for degassing or desulfurization.
- the lances must be designed in such a way that they withstand the considerable stresses that arise during the blowing process due to the temperature itself and the change in temperature, due to the erosive attack by the metal and the slag, due to chemical processes and mechanical stress due to the static and dynamic mechanical forces in the form of buoyancy and vibrations occur.
- the invention has for its object to provide a submersible lance, the heat-dissipating surface is increased by a substantial amount, whereby the thermal stress on the refractory material is significantly lower and thereby a longer service life.
- the moment of resistance of the entire lance should be increased significantly and the effect of damaging vibrations on the lance should be avoided.
- the reinforcement surrounding the inner tube is formed at least from a spirally wound ribbed belt, which forms rib parts at uniform intervals and is connected to the inner tube.
- the rib parts are preferably at right angles to the longitudinal axis of the inner tube, so that the greatest possible stability is ensured.
- the same purpose serves the adjustment of the distances between adjacent fin windings to 1/6 to 3/6 of the inner diameter of the inner tube.
- the ribbed belt advantageously extends over almost the entire length of the inner tube covered by the sheathing, in order to optimize the heat dissipation.
- the invention is applicable to all diving lances with any design, position and arrangement of the outlet openings.
- An advantageous embodiment results, however, if the lower end of the inner tube is closed with a thin sheet metal disk, which is followed by an outlet tube, the diameter of which is smaller than the diameter of the inner tube.
- the lower end of the outlet pipe should end in front of the lowest point of the casing. In the lowest area of the casing, a central head piece made of an easy-to-remove refractory material should continue to be inserted between the lowest point and the lower end of the outlet pipe.
- the immersion lance 1 consists of a metal inner tube 2 and a refractory ceramic monolithic casing 3.
- the lower end of the inner tube 2 is closed with a thin sheet metal disc 4, to which an outlet tube 5 is connected.
- an easily breakable head piece 8 made of refractory material is provided between the lower end 6 of the outlet pipe 5 and the lowest point 7 of the casing 3.
- the inner tube 2 is connected to the environment at the lower end 12 through one or more lateral channels 13 in the casing 3. Through this or these channels 13, the gases, which may be loaded with solids, pass from the inner tube 2 into the molten metal when the immersion lance is immersed. If one or more of the channels 13 is clogged with slag or metal residues, the head piece 8 is broken out and the sheet metal disk 4 is pierced. So that the inner tube 2 has an easy to create further mouth.
- the inner tube 2 is surrounded by a spirally wound fin band 9, which is wound so that fin parts 10 are formed with uniform intervals 11 in the axial direction of the lance.
- the rib parts 10 are, as the drawing shows, at right angles to the longitudinal axis of the inner tube 2 and are corrugated. This increases the heat-dissipating surface.
- An increase in stability results from one or more rods 14 which on the outer circumference of the ribbed belt 9 parallel to the axis of the inner tube 2, z. B. are attached by welding or soldering.
- a plurality of rods 14 can surround the rib belt 9 in a cage-like manner.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
Die Erfindung betrifft eine Tauchlanze zum Einbringen von Behandlungsmedien, wie Gasen insbesondere inerten Gase und/oder Trägergasen, mit denen Feststoffe, wie schlackenbildende Stoffe, Kohlenstoff oder dgl. transportiert werden, in einen mit Metall gefüllten Behälter, insbesondere zur Behandlung von Roheisen oder Stahl. Die Tauchlanze besteht aus einem metallenen Innenrohr für die Zufuhr des Mediums und einer feuerfesten monolithischen keramischen Ummantelung, die mittels einer am Innenrohr anliegenden Armierung gehalten ist, und einer oder mehreren die Ummantelung durchdringenden Auslauföffnungen.The invention relates to an immersion lance for introducing treatment media, such as gases, in particular inert gases and / or carrier gases, with which solids, such as slag-forming substances, carbon or the like, are transported into a container filled with metal, in particular for the treatment of pig iron or steel. The immersion lance consists of a metal inner tube for the supply of the medium and a refractory monolithic ceramic jacket, which is held by means of a reinforcement attached to the inner tube, and one or more outlet openings penetrating the jacket.
Derartige Tauchlanzen sind in vielfältiger Form bekannt und werden zum Durchmischen von Stahlschmelzen, zum Entgasen oder Entschwefeln verwendet. Dazu müssen die Lanzen so ausgelegt sein, daß sie den erheblichen Beanspruchungen widerstehen, die beim Blasvorgang infolge der Temperatur an sich sowie des Temperaturwechsels, infolge des erosiven Angriffs durch das Metall und die Schlacke, aufgrund chemischer Vorgänge und mechanischer Beanspruchung infolge der statisch und dynamisch-mechanischen Kräfte in Form von Auftrieb und Vibrationen auftreten.Immersion lances of this type are known in diverse forms and are used for mixing steel melts, for degassing or desulfurization. For this purpose, the lances must be designed in such a way that they withstand the considerable stresses that arise during the blowing process due to the temperature itself and the change in temperature, due to the erosive attack by the metal and the slag, due to chemical processes and mechanical stress due to the static and dynamic mechanical forces in the form of buoyancy and vibrations occur.
Der Erfindung liegt die Aufgabe zugrunde, eine Tauchlanze zu schaffen, deren wärmeableitende Fläche um ein wesentliches Maß vergrößert ist, wodurch die thermische Beanspruchung des Feuerfest-Materials wesentlich niedriger ist und dadurch eine längere Standzeit entsteht. Außerdem soll das Widerstandsmoment der gesamten Lanze wesentlich erhöht und danach die Einwirkung zerstörender Schwingungen auf die Lanze vermieden werden.The invention has for its object to provide a submersible lance, the heat-dissipating surface is increased by a substantial amount, whereby the thermal stress on the refractory material is significantly lower and thereby a longer service life. In addition, the moment of resistance of the entire lance should be increased significantly and the effect of damaging vibrations on the lance should be avoided.
Diese Aufgabe wird erfindungsgemäß bei einer Tauchtanze mit den gattungsgemäßen Merkmalen dadurch gelöst, daß die das Innenrohr umgebende Armierung mindestens aus einem spiralförmig gewickelten Rippenband gebildet ist, das Rippenteile mit gleichmäßigen Abständen bildet und mit dem Innenrohr verbunden ist.This object is achieved in a diving dance with the generic features in that the reinforcement surrounding the inner tube is formed at least from a spirally wound ribbed belt, which forms rib parts at uniform intervals and is connected to the inner tube.
Die durch das spiralförmige Rippenband um das Innenrohr erzielte Vergrößerung der wärmeableitenden Fläche bewirkt eine erhebliche Verbesserung der kühlenden Wirkung des Spülgases, wodurch kurzzeitige Überhitzungen und Verstopfungen innerhalb der Lanze vermieden werden. Gleichzeitig wird die Stabilität der Tauchlanze vergrößert.The enlargement of the heat-dissipating surface achieved by the spiral ribbed band around the inner tube brings about a considerable improvement in the cooling effect of the flushing gas, as a result of which brief overheating and blockages within the lance are avoided. At the same time, the stability of the diving lance is increased.
Bevorzugt stehen die Rippenteile rechtwinklig zur Längsachse des Innenrohres, damit größtmögliche Stabilität gesichert ist. Demselben Zweck dient die Abstimmung der Abstände zwischen benachbarten Rippenwindungen auf 1/6 bis 3/6 des Innendurchmessers des Innenrohrs.The rib parts are preferably at right angles to the longitudinal axis of the inner tube, so that the greatest possible stability is ensured. The same purpose serves the adjustment of the distances between adjacent fin windings to 1/6 to 3/6 of the inner diameter of the inner tube.
Vorteilhafterweise erstreckt sich das Rippenband über nahezu die gesamte von der Ummantelung abgedeckte Länge des Innenrohrs, um die Wärmeabfuhr optimal zu gestalten.The ribbed belt advantageously extends over almost the entire length of the inner tube covered by the sheathing, in order to optimize the heat dissipation.
An sich ist die Erfindung auf alle Tauchlanzen mit beliebiger Gestaltung, Lage und Anordnung der Austrittsöffnungen anwendbar. Eine vorteilhafte Ausgestaltung ergibt sich jedoch, wenn das untere Ende des Innenrohres mit einer dünnen Blechscheibe verschlossen ist, an die sich ein Austrittsrohr anschließt, dessen Durchmesser kleiner ist als der Durchmesser des Innenrohres. Das untere Ende des Austrittsrohres soll dabei vor dem untersten Punkt der Ummantelung enden. Im untersten Bereich der Ummantelung soll weiterhin zwischen dem untersten Punkt und dem unteren Ende des Austrittsrohres ein zentrales Kopfstück aus einem einfach zu entfernenden feuerfesten Material eingesetzt sein.As such, the invention is applicable to all diving lances with any design, position and arrangement of the outlet openings. An advantageous embodiment results, however, if the lower end of the inner tube is closed with a thin sheet metal disk, which is followed by an outlet tube, the diameter of which is smaller than the diameter of the inner tube. The lower end of the outlet pipe should end in front of the lowest point of the casing. In the lowest area of the casing, a central head piece made of an easy-to-remove refractory material should continue to be inserted between the lowest point and the lower end of the outlet pipe.
Die Erfindung wird anhand des in der Zeichnung dargestellten Ausführungsbeispiels einer Tauchlanze mit den beanspruchten Merkmalen nachfolgend näher beschrieben.The invention is described below with reference to the embodiment of a diving lance shown in the drawing with the claimed features.
Die einzige Figur zeigt einen Längsschnitt der Tauchlanze. Die Tauchlanze 1 besteht aus einem metallenen Innenrohr 2 und einer feuerfesten keramischen monolithischen Ummantelung 3. Das untere Ende des Innenrohres 2 ist mit einer dünnen Blechscheibe 4 verschlossen, an die sich ein Austrittrohr 5 anschließt. Zwischen dem unteren Ende 6 des Austrittsrohres 5 und dem untersten Punkt 7 der Ummantelung 3 ist ein leicht ausbrechbares Kopfstück 8 aus Feuerfest-Material vorgesehen.The only figure shows a longitudinal section of the diving lance. The immersion lance 1 consists of a metal
Das Innenrohr 2 steht am unteren Ende 12 durch einen oder mehrere seitliche Kanäle 13 in der Ummantelung 3 mit der Umgebung in Verbindug. Durch diesen oder diese Kanäle 13 gelangen die ggf. mit Feststoffen beladenen Gase aus dem Innenrohr 2 bei eingetauchter Tauchlanze in die Metallschmelze. Wenn eine oder mehrere der Kanäle 13 mit Schlacke- oder Metallresten verstopft ist, wird das Kopfstück 8 ausgebrochen und die Blechscheibe 4 durchstoßen. Damit hat das Innenrohr 2 eine leicht zu schaffende weitere Ausmündung.The
Das Innenrohr 2 ist mit einem spiralförmig gewickelten Rippenband 9 umgeben, das so gewickelt ist, daß Rippenteile 10 mit gleichmäßigen Abständen 11 in Axialrichtung der Lanze gebildet sind. Die Rippenteile 10 stehen, wie die Zeichnung erkennen läßt, im rechten Winkel zur Längsachse des Innenrohres 2 und sind gewellt. Dadurch wird die wärmeableitende Oberfläche vergrößert.The
Eine Stabilitätserhöhung ergibt sich durch einen oder mehrere Stäbe 14, die am Außenumfang des Rippenbandes 9 parallel zur Achse des Innenrohrs 2, z. B. durch Schweißen oder Löten, angebracht sind. Mehrere Stäbe 14 können das Rippenband 9 käfigartig umgeben.An increase in stability results from one or
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT87111378T ATE52279T1 (en) | 1986-08-20 | 1987-08-06 | DIVING LANCE. |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19868622299 DE8622299U1 (en) | 1986-08-20 | 1986-08-20 | Diving lance |
| DE8622299U | 1986-08-20 | ||
| DE3719862 | 1987-06-13 | ||
| DE3719862A DE3719862C2 (en) | 1986-08-20 | 1987-06-13 | DIVE LANCE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0261365A1 EP0261365A1 (en) | 1988-03-30 |
| EP0261365B1 true EP0261365B1 (en) | 1990-04-25 |
Family
ID=25856649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87111378A Expired - Lifetime EP0261365B1 (en) | 1986-08-20 | 1987-08-06 | Immersion lance |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4783060A (en) |
| EP (1) | EP0261365B1 (en) |
| DE (2) | DE3719862C2 (en) |
| ES (1) | ES2015560B3 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3838337A1 (en) * | 1988-11-11 | 1990-05-17 | Linde Ag | METHOD AND COUPLING PLANT FOR PRODUCING HIGH-QUALITY IRON |
| RU2134303C1 (en) * | 1998-10-20 | 1999-08-10 | Шатохин Игорь Михайлович | Tuyere for blow-through of metal melt and injection of powdery reagents into melt |
| DE29914990U1 (en) * | 1999-08-27 | 2001-01-18 | Plibrico GmbH, 40210 Düsseldorf | Reinforcement for sheathing a metal pipe |
| AUPR624801A0 (en) | 2001-07-10 | 2001-08-02 | Technological Resources Pty Limited | A gas injection lance |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4827045B1 (en) * | 1970-06-23 | 1973-08-18 | ||
| US3833209A (en) * | 1973-04-04 | 1974-09-03 | Berry Metal Co | Apparatus for refining of steel |
| GB1431123A (en) * | 1973-08-22 | 1976-04-07 | Stein Refractories | Metallurgical lances |
| DE2626982C3 (en) * | 1975-01-21 | 1985-04-04 | GR-Stein Refractories Ltd., Sheffield, Yorkshire | Lance for blowing fluidized substances into a molten metal and method for producing the lance |
| DE7613309U1 (en) * | 1976-04-28 | 1976-09-02 | Stahlwerke Peine-Salzgitter Ag, 3150 Peine | LANCE FOR INJECTING FLUIDIZED SUBSTANCES INTO A METAL MELT |
| BE904670R (en) * | 1978-10-27 | 1986-08-18 | Desaar Rene | Improved injection lance nozzle desulphurising etc. hot metal - has at least two outlet tubes arranged to ensure lateral injection |
| BE879036A (en) * | 1979-09-27 | 1980-01-16 | Desaar Rene | SQUEEGEE FOR BLOWING OR INJECTION LANCE |
| HU186052B (en) * | 1982-04-06 | 1985-05-28 | Energiagazdalkodasi Intezet | Spiral-grilled tube particularly for heat exchangers |
| SE447675B (en) * | 1982-10-15 | 1986-12-01 | Ifm Dev Ab | Nozzle for injection injection |
| DE8312421U1 (en) * | 1983-04-27 | 1983-09-15 | Plibrico Co GmbH, 4000 Düsseldorf | DIVE LANCE |
| DE3322556A1 (en) * | 1983-06-23 | 1985-01-10 | Didier-Werke Ag, 6200 Wiesbaden | Lance for blowing fluidised materials into molten metal |
| SU1206314A1 (en) * | 1984-05-30 | 1986-01-23 | Научно-исследовательский институт металлургии | Tuyere for bottom blowing of metal |
| DE3511772A1 (en) * | 1985-03-30 | 1986-10-09 | Didier-Werke Ag, 6200 Wiesbaden | Blowing lance |
-
1987
- 1987-06-13 DE DE3719862A patent/DE3719862C2/en not_active Expired
- 1987-08-06 US US07/088,419 patent/US4783060A/en not_active Expired - Fee Related
- 1987-08-06 EP EP87111378A patent/EP0261365B1/en not_active Expired - Lifetime
- 1987-08-06 ES ES87111378T patent/ES2015560B3/en not_active Expired - Lifetime
- 1987-08-06 DE DE8787111378T patent/DE3762429D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE3719862C2 (en) | 1988-10-27 |
| DE3762429D1 (en) | 1990-05-31 |
| DE3719862A1 (en) | 1988-02-25 |
| ES2015560B3 (en) | 1990-09-01 |
| US4783060A (en) | 1988-11-08 |
| EP0261365A1 (en) | 1988-03-30 |
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