EP0261365B1 - Lance immergée - Google Patents
Lance immergée 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
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)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT87111378T ATE52279T1 (de) | 1986-08-20 | 1987-08-06 | Tauchlanze. |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8622299U | 1986-08-20 | ||
DE19868622299 DE8622299U1 (de) | 1986-08-20 | 1986-08-20 | Tauchlanze |
DE3719862 | 1987-06-13 | ||
DE3719862A DE3719862C2 (de) | 1986-08-20 | 1987-06-13 | Tauchlanze |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0261365A1 EP0261365A1 (fr) | 1988-03-30 |
EP0261365B1 true EP0261365B1 (fr) | 1990-04-25 |
Family
ID=25856649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87111378A Expired - Lifetime EP0261365B1 (fr) | 1986-08-20 | 1987-08-06 | Lance immergée |
Country Status (4)
Country | Link |
---|---|
US (1) | US4783060A (fr) |
EP (1) | EP0261365B1 (fr) |
DE (2) | DE3719862C2 (fr) |
ES (1) | ES2015560B3 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3838337A1 (de) * | 1988-11-11 | 1990-05-17 | Linde Ag | Verfahren und kupolofenanlage zur erzeugung von hochwertigem eisen |
DE29914990U1 (de) * | 1999-08-27 | 2001-01-18 | Plibrico Gmbh | Armierung für eine Ummantelung eines Metallrohrs |
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 (fr) * | 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 (de) * | 1975-01-21 | 1985-04-04 | GR-Stein Refractories Ltd., Sheffield, Yorkshire | Lanze zum Einblasen fluidisierter Stoffe in eine Metallschmelze und Verfahren zur Herstellung der Lanze |
DE7613309U1 (de) * | 1976-04-28 | 1976-09-02 | Stahlwerke Peine-Salzgitter Ag, 3150 Peine | Lanze zum einblasen fluidisierter stoffe in eine metallschmelze |
BE904670R (fr) * | 1978-10-27 | 1986-08-18 | Desaar Rene | Nez de lance de desulfuration de fonte ou d'acier. |
BE879036A (fr) * | 1979-09-27 | 1980-01-16 | Desaar Rene | Virole pour lance de soufflage ou d'injection |
HU186052B (en) * | 1982-04-06 | 1985-05-28 | Energiagazdalkodasi Intezet | Spiral-grilled tube particularly for heat exchangers |
SE447675B (sv) * | 1982-10-15 | 1986-12-01 | Ifm Dev Ab | Dysa for injektionslans |
DE8312421U1 (de) * | 1983-04-27 | 1983-09-15 | Plibrico Co GmbH, 4000 Düsseldorf | Tauchlanze |
DE3322556A1 (de) * | 1983-06-23 | 1985-01-10 | Didier-Werke Ag, 6200 Wiesbaden | Lanze zum einblasen fluidisierter stoffe in eine metallschmelze |
SU1206314A1 (ru) * | 1984-05-30 | 1986-01-23 | Научно-исследовательский институт металлургии | Фурма дл глубинной продувки металла |
DE3511772A1 (de) * | 1985-03-30 | 1986-10-09 | Didier-Werke Ag, 6200 Wiesbaden | Blaslanze |
-
1987
- 1987-06-13 DE DE3719862A patent/DE3719862C2/de not_active Expired
- 1987-08-06 DE DE8787111378T patent/DE3762429D1/de not_active Expired - Fee Related
- 1987-08-06 US US07/088,419 patent/US4783060A/en not_active Expired - Fee Related
- 1987-08-06 ES ES87111378T patent/ES2015560B3/es not_active Expired - Lifetime
- 1987-08-06 EP EP87111378A patent/EP0261365B1/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE3719862C2 (de) | 1988-10-27 |
US4783060A (en) | 1988-11-08 |
ES2015560B3 (es) | 1990-09-01 |
EP0261365A1 (fr) | 1988-03-30 |
DE3719862A1 (de) | 1988-02-25 |
DE3762429D1 (de) | 1990-05-31 |
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