EP1211327A2 - Blaslanze - Google Patents
Blaslanze Download PDFInfo
- Publication number
- EP1211327A2 EP1211327A2 EP01128666A EP01128666A EP1211327A2 EP 1211327 A2 EP1211327 A2 EP 1211327A2 EP 01128666 A EP01128666 A EP 01128666A EP 01128666 A EP01128666 A EP 01128666A EP 1211327 A2 EP1211327 A2 EP 1211327A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle head
- outer tube
- section
- 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.)
- Withdrawn
Links
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 8
- 239000001301 oxygen Substances 0.000 title claims abstract description 8
- 238000007664 blowing Methods 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 26
- 239000000155 melt Substances 0.000 claims abstract description 10
- 239000012809 cooling fluid Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 6
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 239000002893 slag Substances 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000001976 improved effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000010792 warming Methods 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
Definitions
- the invention relates to a blowing lance with a Outer tube, at the free end of a nozzle head for blowing of blowing fluid is attached to a melt.
- blowing lances are used, for example, in the fresh process in the converter large amounts of oxygen to one Cast iron melt blown.
- a blow lance intended for this purpose is for example from DE 31 22 178 A1 or DE-AS 925 045 known.
- a nozzle head is attached to an outer tube.
- the outer tube surrounds two concentrically to the outer tube arranged inner tubes. Their diameter is like this dimensioned that between the outer tube and the first Inner tube and between the two inner tubes each a channel is formed.
- This cooling fluid in the Circuit through the nozzle head while the Blow fluid simultaneously through the inner tube with the smallest diameter flows to the nozzle of the nozzle head.
- the nozzle head increase is usually from a good thermally conductive copper alloy.
- the pipes of the In contrast, the blow lance is made of steel.
- Inflating the oxygen leads to exothermic Reactions that remove carbon from pig iron and the temperature of the melt is increased.
- the Fresh process and that with the inflation of the blowing fluid even connected gas flows lead to Formation of liquid steel and slag splashes, which splash from the melt against the blowing lance.
- This task is carried out with a blow lance that is equipped with a Outer tube is equipped at its free end Nozzle head for blowing blowing fluid onto a melt is attached, solved according to the invention in that a part of the nozzle arranged adjacent to the nozzle head Outer tube at least in sections from a material is manufactured, whose thermal conductivity is higher than the conductivity of the material from which it is attached Part of the adjacent part of the outer tube.
- the outer tube is in the Area of its having a higher thermal conductivity Part by a flowing through the blowing lance Coolant cools more than conventional ones Blow lances is the case. It has surprisingly been shown that achieved by operating in this way Reduction in temperature on the outer surface of the Part of the formation of significant deposits can be effectively prevented in this area. Those that hit the relatively cool section Melting splashes burst due to their quick Solidification from the pipe and fall back into the Melt container.
- blowing lances 1 Fig. 1
- 10 Fig. 2
- the tube 3 comprises an outer tube 4, a first Inner tube 5 and a second inner tube 6.
- the at Welding the nozzle head 2 onto the outer tube 4 formed, the boundary between the nozzle head 2 and the outer tube 4 marking weld seam is in the figures with 2a designated.
- the outer tube 4 and the inner tubes 5,6 are coaxial arranged to each other. Their diameters are like this matched to each other that between the outer tube 4 and the first inner tube 5 a jacket-shaped the first Inner tube 5 surrounding return flow channel 7 and between the first inner tube 5 and the second inner tube 6 a likewise jacket-like surrounding the second inner tube 6 Inflow channel 8 are formed. Via the inflow channel 8 flows as cooling fluid cooling water W in the nozzle head 2 and does not become one from there via the return flow channel 7 shown cooling fluid supply returned.
- the second Inner tube 6 encloses a channel 9 for the blowing gas from the nozzle head 2 blown oxygen S.
- both the outer tube 4 and the Inner tubes 5 and 6 are cylindrical and have one essentially constant over its length Outside diameter Dk2.
- Blow lance 10 equal to the diameter of the flush to the Outer tube 4 connected nozzle head 2.
- the outer tube 4 and the inner tubes 5,6 consist basically made of a steel material, its strength and thermal expansion behavior (expansion when heated / Shrinkage when cooling) are set so that a optimal durability and heat resistance of the Pipes is guaranteed.
- the outer tube 4 is the Steel material, however, each has a closely adjacent to Nozzle head 2 arranged section T1 (Fig. 1) or T2 (Fig. 2) replaced by a copper alloy. This points better thermal conductivity than the steel material from which the outer tube 4 is otherwise. On this occurs in the area of the section T1 or T2 a greater cooling of the wall of the outer tube 4 through the cooling water led through the return flow channel 7 W a than in the rest of the steel material existing sections of the outer tube 4th
- the blowing lances 1.10 have a length of, for example twenty meters up.
- the Diameter Dk of the nozzle head 2 is at Blow lance 1 approx. 350 mm.
- the length L1 is the from the copper material with higher thermal conductivity existing section T1 limited to 200 mm, while the length L2 of the section T2 in the example of FIG. 2 the length Ls reached by steel and slag splashes of the outer tube 4 essentially completely covers.
- higher Thermal conductivity can also be shown in FIG. 2
- a shorter length exhibiting section of high thermal conductivity be incorporated within the length Ls limited section of the outer tube 4 arranged is.
- the average wall temperature is in the range of the sections T1 and T2 each about 100 ° C lower than the average wall temperature at conventional trained, from a uniform steel material existing blowing lances 1.10 in this area.
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)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Furnace Charging Or Discharging (AREA)
Abstract
Description
- Fig. 1
- die Spitze einer ersten Blaslanze in einem Längsschnitt;
- Fig. 2
- die Spitze einer zweiten Blaslanze in einem Längsschnitt.
- 1,10
- Blaslanzen
- 2
- Düsenkopf
- 3
- Rohr
- 4
- Außenrohr
- 5
- erstes Innenrohr
- 6
- zweites Innenrohr
- 7
- Rückströmkanal
- 8
- Zuströmkanal
- 9
- Kanal
- Dk
- Durchmesser des Düsenkopfes 2
- Dk2
- Durchmesser der Blaslanze 10
- L1
- Länge des Teilstücks T1
- L2
- Länge des Teilstücks T2
- Ls
- von Stahl- und Schlackspritzern erreichte Länge
- S
- Sauerstoff
- T1,T2
- Teilstücke erhöhter Wärmeleitfähigkeit
- W
- Kühlwasser
Claims (8)
- Blaslanze mit einem Außenrohr (4), an dessen freien Ende ein Düsenkopf (2) zum Blasen von Blasfluid (S), insbesondere Sauerstoff, auf eine Schmelze befestigt ist, dadurch gekennzeichnet, daß ein benachbart zu dem Düsenkopf (2) angeordnetes Teilstück (T1,T2) des Außenrohrs (4) zumindest abschnittsweise aus einem Werkstoff gefertigt ist, dessen Wärmeleitfähigkeit höher ist als die Leitfähigkeit des Werkstoffs, aus dem der an dieses Teilstück (4) angrenzende Teil des Außenrohrs (4) besteht.
- Blaslanze nach Anspruch 1, dadurch gekennzeichnet, daß das Teilstück (T1,T2) unmittelbar an den Düsenkopf (2) angrenzt.
- Blaslanze nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß das Teilstück (T1,T2) vollständig aus dem Werkstoff höherer Wärmeleitfähigkeit besteht.
- Blaslanze nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß das Teilstück (T1,T2) aus einem Werkstoff besteht, dessen Wärmeleitfähigkeit der des Düsenkopfs (2) entspricht.
- Blaslanze nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß das Teilstück (T1,T2) aus Kupfer oder einer Kupferlegierung gefertigt ist.
- Blaslanze nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die Länge (L1,L2) des Teilstücks das 0,3- bis 3-fache des Durchmessers (Dk) des Düsenkopfes (2) beträgt.
- Blaslanze nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß in dem Außenrohr (2) und koaxial zu diesem mindestens zwei Innenrohre (5,6) unterschiedlichen Durchmessers angeordnet sind und daß zwischen dem ersten Innenrohr (5) und dem Außenrohr (4) ein erster Kanal (7) für Kühlfluid (W), zwischen dem ersten Innenrohr (5) und dem zweiten Innenrohr (6) ein zweiter Kanal (8) für Kühlfluid (W) und in dem zweiten Innenrohr (6) ein Kanal (9) für das Blasfluid (S) ausgebildet sind.
- Blaslanze nach Anspruch 7, dadurch gekennzeichnet, daß das Kühlfluid (W) durch den zweiten Kanal (8) in Richtung des Düsenkopfes (2) und durch den ersten Kanal (7) zurück in Richtung einer Kühlmittelversorgung strömt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10060217 | 2000-12-04 | ||
| DE2000160217 DE10060217B4 (de) | 2000-12-04 | 2000-12-04 | Blaslanze |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1211327A2 true EP1211327A2 (de) | 2002-06-05 |
| EP1211327A3 EP1211327A3 (de) | 2003-11-26 |
Family
ID=7665735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01128666A Withdrawn EP1211327A3 (de) | 2000-12-04 | 2001-12-01 | Blaslanze |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1211327A3 (de) |
| DE (1) | DE10060217B4 (de) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB758529A (en) * | 1953-11-06 | 1956-10-03 | Steel Co Of Wales Ltd | Improvements in steel manufacture |
| US3322419A (en) * | 1964-12-24 | 1967-05-30 | Union Carbide Corp | Oxygen jet devices |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1044152A (de) * | 1900-01-01 | |||
| GB852045A (en) * | 1956-10-13 | 1960-10-19 | Bot Brassert Oxygen Technik Ag | Improvements in or relating to blast tubes for refining crude iron |
| GB1014109A (en) * | 1963-07-05 | 1965-12-22 | British Oxygen Co Ltd | Water-cooled oxygen lance |
| FR2011258A1 (de) * | 1968-06-20 | 1970-02-27 | Combinatul Siderurgic | |
| AT331285B (de) * | 1973-11-27 | 1976-08-10 | Voest Ag | Wassergekuhlte lanze fur metallurgische ofen |
| DE3122178A1 (de) * | 1981-06-04 | 1983-01-20 | Ottmar 6600 Saarbrücken Mengelkoch | Abloes- und austauschbarer hitze- und spritzschutz fuer sauerstoffblaslanzen zur stahlerzeugung |
| JP3384192B2 (ja) * | 1995-05-25 | 2003-03-10 | 日本鋼管株式会社 | 精錬用兼副ノズル付きランス |
| BE1009743A3 (fr) * | 1995-06-23 | 1997-07-01 | Thomas Jacques | Tuyere de soufflage a oxygene siderurgique. |
-
2000
- 2000-12-04 DE DE2000160217 patent/DE10060217B4/de not_active Expired - Fee Related
-
2001
- 2001-12-01 EP EP01128666A patent/EP1211327A3/de not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB758529A (en) * | 1953-11-06 | 1956-10-03 | Steel Co Of Wales Ltd | Improvements in steel manufacture |
| US3322419A (en) * | 1964-12-24 | 1967-05-30 | Union Carbide Corp | Oxygen jet devices |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10060217B4 (de) | 2004-04-15 |
| DE10060217A1 (de) | 2002-06-13 |
| EP1211327A3 (de) | 2003-11-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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| AK | Designated contracting states |
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| AX | Request for extension of the european patent |
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| PUAL | Search report despatched |
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| AK | Designated contracting states |
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| AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO SI |
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| 17P | Request for examination filed |
Effective date: 20040505 |
|
| AKX | Designation fees paid |
Designated state(s): BE DE FR IT |
|
| 17Q | First examination report despatched |
Effective date: 20040721 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: THYSSENKRUPP STEEL AG |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20040527 |
|
| R18D | Application deemed to be withdrawn (corrected) |
Effective date: 20060704 |