EP1288315A2 - Feuerfeste Blaslanze und Verfahren zu deren Herstellung - Google Patents
Feuerfeste Blaslanze und Verfahren zu deren Herstellung Download PDFInfo
- Publication number
- EP1288315A2 EP1288315A2 EP02018617A EP02018617A EP1288315A2 EP 1288315 A2 EP1288315 A2 EP 1288315A2 EP 02018617 A EP02018617 A EP 02018617A EP 02018617 A EP02018617 A EP 02018617A EP 1288315 A2 EP1288315 A2 EP 1288315A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- annular gap
- head
- gas
- lance
- blowing lance
- 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
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
- C21C5/462—Means for handling, e.g. adjusting, changing, coupling
Definitions
- the invention relates to a fireproof blow lance for immersion in a molten metal according to the preamble of claim 1 and a method for their Production.
- AT-PS 225 213 shows a blowing lance for insertion of additives in carbon-containing iron baths and has several concentric tubes at the head of the Lance form an annular gap at which the gas exits axially. The gas should then hit the surface of the bath. This lance is not for immersion in a bath suitable.
- DE 25 46 647 B2 shows a diving lance with two concentric Pipes, the interior of which has an axial opening and the exterior has a radial opening. At the head end In the end, the two pipes are tightly connected.
- the gas to be introduced into the melt occurs during operation mainly from the central opening with which Consequence that larger gas bubbles accumulate there, what to a "pulsation" of the gas and that larger Gas bubbles get into the bathroom instead of small, finely divided ones.
- DE 195 04 941 A1 shows a gas purging plug that passes through Pouring a refractory material into a mold, in the one from a meltable or burnable substance formed, open hollow body used in the manner of a sleeve is manufactured.
- the side walls of the hollow body have flat breakthroughs in which later between existing wall areas of the gas passage channels of the gas purging plug. After setting the the hollow body is melted out of refractory material or burned out, which then forms a gas purging plug, the gas passage channels in the form of joints.
- Blow lances for the introduction of gases and in particular of argon and nitrogen in molten metals (also flushing or Called diving lance) today consist of one metallic support tube and a highly refractory Sheathing.
- the gas is supplied above Melt at one end of the tube. After immersing the Purging lance into the molten metal causes the gas to escape via nozzles that extend axially in the pipe (DE 297 00 948 U1) or can also run radially.
- nozzles that extend axially in the pipe (DE 297 00 948 U1) or can also run radially.
- the in practice, the number of nozzles varies from one to three. In practice, the nozzle diameter is between 3 and 12 mm.
- the object of the invention is to provide an improved blowing lance and to specify a method for their production, with which the above disadvantages are avoided.
- the blowing lance has a longer life and one Achieve improvement in metallurgical processes.
- the basic idea of the invention lies in the head of the Blow lance to provide an annular gap as an outlet opening. This gives you a very even all-round flush and the generation of many small bubbles with large ones specific reaction surface. This way you reach also a better dissolution of the alloy metals and a better homogenization of the molten metal and the Metal temperature. Through the small glass bubbles you get a lower pulsation on the bath surface, i.e. a so-called "soft bubbling". You also get a lower one Metal oxidation and less wear on the refractory material in the slag zone of the blow lance. The risk of the annular gap closing up is in practice almost non-existent.
- Fig. 1 shows a schematic representation of a blowing lance 1, which is coated with refractory material 2 and one Head 3 made of refractory material at the front At the end there is a pressure chamber 4.
- the head In the field of Pressure chamber 4, the head is closed with a cover 7, of a variety of webs 9 with the rest of the head 3 is connected, with a circumferential annular gap 8 between the lid 7 and the rest of the head 3 is formed is in flow connection with the pressure chamber 4.
- the Pressure chamber 4 is through a hollow tube 10 with a Gas source connectable. Through the annular gap 8 one obtains an even all-round flush and a variety of Small bubbles with a specific reaction surface. The There is a risk of the annular gap closing or clogging practically not given.
- FIGS. 2 to 4 the manufacturing process explained.
- A is used to form the annular gap Foil 6 used, which has a plurality of holes 12 (Fig. 3).
- This film 6 is in a not shown Mold inserted, which is then made with pasty refractory material is filled, the holes 12 of the film 6 of the Refractory materials are penetrated so that the head 3 of the blowing lance on the one hand through the film 6 in two Parts 3 'and 3 "is divided, but these two parts connected to each other by webs 9 made of refractory material are. These webs are formed at the points where there are holes 12.
- the curing takes place under the influence of heat, the Slide 6 at a predetermined temperature of about 360 ° C melts, causing the ring gap in the refractory material 8 forms, which is only interrupted by the webs 9 is.
- the perforated film has a thickness of 0.3 to 0.5 mm. Other Thicknesses of up to several mm are also possible. Also the film may be curled so that there is a curled Gap results in the circumferential direction. The film can also be in radial direction so that the annular gap 8th is corrugated in the direction of flow of the gas. Instead of the perforated film can also use a mesh of meltable material become.
- the width of the webs 9 in the circumferential direction can be further Can be varied by the diameter of the holes 12 is varied.
- the holes can also be made in the film be arranged so that they lie in the lateral surface, so that the webs come to rest flush with the outer surface.
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)
- Furnace Charging Or Discharging (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
- Fig. 1
- eine schematische Darstellung der Blaslanze nach der Erfindung;
- Fig. 2
- eine detailiertere Darstellung einer Druckkammer der Blaslanze während eines Herstellschrittes;
- Fig. 3
- eine Draufsicht einer bei der Herstellung verwendeten Lochfolie; und
- Fig. 4
- einen Schnitt längs der Linie A-A der Fig. 1 zur Darstellung des Ringspaltes.
Claims (4)
- Feuerfeste Blaslanze zum Eintauchen in eine Metallschmelze und Einbringen von Gas in die Metallschmelze mit einem Kopf, der eine Gasaustrittsöffnung aufweist, dadurch gekennzeichnet, daß der Kopf (3) durch einen Ringspalt (8) in zwei Teile (3', 3") aufgeteilt ist, die durch eine Vielzahl von Stegen (9) miteinander verbunden sind, wobei der Ringspalt (8) die Gasaustrittsöffnung bildet, durch die das Gas radial austritt.
- Blaslanze nach Anspruch 1, dadurch gekennzeichnet, daß die beiden Kopfteile (3', 3") monolithisch sind.
- Blaslanze nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Ringspalt eine in Achsrichtung (11) gemessene Länge von 0,3 bis 0,5 mm hat.
- Verfahren zur Herstellung einer feuerfesten Blaslanze nach einem der Ansprüche 1 bis 3, gekennzeichnet durch folgende Schritte:Einlegen einer Folie mit einer Vielzahl von Löchern in eine Form,Füllen der Form mit feuerfestem Material, undTrocknen des Feuerfestmaterials unter Einwirkung von Wärme, die zu einem Schmelzen der Folie führt und dadurch den Ringspalt bildet.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10140667 | 2001-08-24 | ||
DE10140667A DE10140667C1 (de) | 2001-08-24 | 2001-08-24 | Feuerfeste Blaslanze und Verfahren zu deren Herstellung |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1288315A2 true EP1288315A2 (de) | 2003-03-05 |
EP1288315A3 EP1288315A3 (de) | 2003-12-03 |
EP1288315B1 EP1288315B1 (de) | 2008-11-26 |
Family
ID=7695949
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02018617A Expired - Lifetime EP1288315B1 (de) | 2001-08-24 | 2002-08-20 | Feuerfeste Blaslanze und Verfahren zu deren Herstellung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1288315B1 (de) |
AT (1) | ATE415496T1 (de) |
DE (2) | DE10140667C1 (de) |
ES (1) | ES2317970T3 (de) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4192490A (en) * | 1977-10-04 | 1980-03-11 | Stiftelsen For Metallurgisk Forskning | Lance for injecting powdery material into molten metal |
DE2934292A1 (de) * | 1978-12-11 | 1980-06-19 | Chamotte Gibbons Continental B | Spuellanze |
EP1077266A2 (de) * | 1999-08-19 | 2001-02-21 | Tokyo Yogyo Kabushiki Kaisha | Gasspülstein und dessen Herstellungsverfahren |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT225213B (de) * | 1960-05-27 | 1963-01-10 | Oesterr Alpine Montan | Verfahren und Einrichtung zur Einbringung von Zusatzstoffen in kohlenstoffhaltige Eisenbäder |
DE19504941C2 (de) * | 1995-02-15 | 1998-05-20 | Knoellinger Horst | Gasspülstein |
-
2001
- 2001-08-24 DE DE10140667A patent/DE10140667C1/de not_active Expired - Fee Related
-
2002
- 2002-08-20 ES ES02018617T patent/ES2317970T3/es not_active Expired - Lifetime
- 2002-08-20 EP EP02018617A patent/EP1288315B1/de not_active Expired - Lifetime
- 2002-08-20 AT AT02018617T patent/ATE415496T1/de active
- 2002-08-20 DE DE50213046T patent/DE50213046D1/de not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4192490A (en) * | 1977-10-04 | 1980-03-11 | Stiftelsen For Metallurgisk Forskning | Lance for injecting powdery material into molten metal |
DE2934292A1 (de) * | 1978-12-11 | 1980-06-19 | Chamotte Gibbons Continental B | Spuellanze |
EP1077266A2 (de) * | 1999-08-19 | 2001-02-21 | Tokyo Yogyo Kabushiki Kaisha | Gasspülstein und dessen Herstellungsverfahren |
Also Published As
Publication number | Publication date |
---|---|
DE50213046D1 (de) | 2009-01-08 |
ATE415496T1 (de) | 2008-12-15 |
ES2317970T3 (es) | 2009-05-01 |
EP1288315A3 (de) | 2003-12-03 |
EP1288315B1 (de) | 2008-11-26 |
DE10140667C1 (de) | 2003-03-13 |
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