EP0842303B1 - Lanzenkopf einer blaslanze zur behandlung von schmelzen - Google Patents
Lanzenkopf einer blaslanze zur behandlung von schmelzen Download PDFInfo
- Publication number
- EP0842303B1 EP0842303B1 EP96931738A EP96931738A EP0842303B1 EP 0842303 B1 EP0842303 B1 EP 0842303B1 EP 96931738 A EP96931738 A EP 96931738A EP 96931738 A EP96931738 A EP 96931738A EP 0842303 B1 EP0842303 B1 EP 0842303B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lance head
- head according
- chamber
- nozzle
- segments
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
Definitions
- the invention relates to a lance head of a water-cooled blowing lance Treatment of melts, especially for inflating oxygen Melting steel in a converter, with at least one of the closest Pipe section having a nozzle cross section proceeding in the direction Bath surface with conically expanding expansion nozzle.
- Blow lances are used in steelworks, which after the Oxygen inflation process work.
- steel making processes in particular according to the so-called LD process, are contained in the pig iron Accompanying elements with the help of oxygen removed by oxidation. This is about the Lance oxygen at high speed from MACH 1.0 and greater to that in the Inflated melt inflated.
- the individual blow lance heads are based on steel mill-specific data designed. In particular, the converter content, the converter dimensions, the current bath height and the amount of oxygen as well as the oxygen pressure considered.
- Lances of this type can only be used to achieve a restless oxygen jet with which adverse consequence of unwanted steel splashes and strong dust in the Area of the converter mouth.
- the present invention has set itself the goal of a generic To create a blowing lance with which the energy utilization of the oxygen steel increased, the reaction conditions in the converter improved and the environmental impact is reduced.
- connection with the critical cross section Pipe section provided a first conical extension in a cylindrical Canal opens.
- this channel which will be almost to the mouth of the nozzle can, is an annular chamber widening radially outward in diameter intended. This design creates a pulsating gas jet that formed stable leaves the nozzle and hits the surface of the melt.
- the nozzle is designed so that at pressures up to 15 bar speeds between 1 and 3 mach.
- the oscillation frequency of the gas is there adjustable in a range from 200 to 2000 Hz.
- the preferred frequency range is 600 to 800 Hz.
- oxygen quantities can be at high Use of energy for inflation or inflation on or in a molten metal of steel processing.
- the design of the ring channel also helps to stabilize the gas jet not smooth design increased.
- the annulus is divided into several Chamber segments divided, which are separated by webs.
- the chamber segments have different radii, with pairs lying opposite each other Chamber segments have the same radius.
- the outer walls of the chamber segments have continuously increasing radii.
- panes are provided which are in are arranged in series so that the webs correspond to each other and Chamber segments with different radii are arranged in the direction of flow are.
- the expansion part which adjoins the annular chamber in the flow direction Part of the nozzle can be cylindrical before it is in the region of the The mouth opens conically.
- the cylindrical part has a positive influence the pulsating beam and further stabilizes it, particularly with respect to a Rotation in the axial direction.
- the range of the critical diameter of the nozzle is corresponding to that Laval nozzle design rounded. In another, there This area is made of conical and technically simple cylindrical shaped elements assembled.
- the desired frequency of the gas jet can between the first conical expansion in the area of the nozzle inlet and the Annular chamber provided one or more stages.
- the individual levels are set apart from each other and stimulate the gas jet to vibrate.
- the mouth of the conical extension can have a diameter that the of the cylindrical channel.
- a smaller one Mouth diameter provided, as this already when entering the channel a first stage is created with which a positive influence on the pulsation of the gas jet is taken.
- FIG. 1 shows a conical entrance section on the left side of the section 11, which is rounded in a tube section having the critical diameter 12 merges, on which a first conical extension 21 is formed like a Laval nozzle connects.
- the first conical extension 21 ends in an identical one Diameter channel 22.
- annular chamber 23 is provided in the channel, which has an inner diameter D Z.
- the design of the annular chamber is shown in Figures 2 and 3.
- a nozzle part 24 adjoins the annular chamber 23 and widens conically over a length L A to the nozzle mouth.
- the conical inlet section 11 is followed by a pipe section 12 which has the critical cross section D Q.
- the critical cross section is followed by a first conical extension 21, the mouth of which has a diameter D M , which in the present example ends in a preliminary stage 27 which has a diameter D K1 which is larger than the diameter D M.
- a channel 22 adjoins the preliminary stage 27 and has a diameter D KA , where D KA is greater than D K1 .
- An annular chamber 23 is provided in the channel 22, in which disks 37, 38 are located. These disks are arranged with respect to one another such that the webs 35 correspond with each other and the chamber segments are different Have radii.
- a channel part 25 is provided, which has the same dimensions as the channel 22 over a length L KA , so that a second conical widening 26 adjoins the mouth with the diameter D A at a distance L MA .
- the total length L A corresponds to the sum of the cylindrical chamber length L KA and the length of the conical mouth L MA .
- FIG. 2a shows a section through the annular chamber 23.
- a total of four chamber segments 31 to 34 are provided, the Chamber segments 31 and 33 have the same and smaller radius than that Chamber segments 32 and 34.
- the individual chamber segments are separated from one another by webs 35.
- the individual webs have a width that influences the individual Prevent segments. Beyond the number of four segments shown any even number of segments possible, with the radii of each opposite segments have the same size.
- the single ones Chamber segments are rounded in the outer corners with a radius r.
- FIG. 2b the situation is in the case of one behind the other in the direction of flow Disks shown.
- the individual segments are arranged so that a chamber segment with a small radius alternates with each in the direction of flow a chamber segment with a large radius.
- annular chamber is shown in accordance with Figure 2, the individual chamber segments with continuously increasing radii are designed.
- This design of the chamber segments can in particular Influence on the direction of rotation of the pulsating beam.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
- Figur 1
- einen Schnitt durch den Lanzenkopf
- Figur2a,b
- Schnitte durch Ringkammem mit konstanten Radien
- Figur 3
- einen Schnitt durch die Ringkammer mit kontinuierlich sich vergrößernden Radien
- 11
- konischer Eingangsabschnitt
- 12
- Rohrabschnitt
- 21
- Erste konische Erweiterung
- 22
- Kanal
- 23
- Ringkammer
- 24
- Düsenteil
- 25
- Kanalteil
- 26
- Zweite Konische Erweiterung
- 27
- Vorstufe
- 29
- Mündung der Expansionsdüse
- 31,33
- Kammersegmente kleiner Radius
- 32, 34
- Kammersegmente großer Radius
- 35
- Steg
- 36
- Außenwandung
- 37
- Erste Scheibe
- 38
- Zweite Scheibe
- 41
- Kühlkammer
- D
- Durchmesser
- L
- Länge
- E
- Eintritt
- Q
- Kritischer Querschnitt
- M
- Mündung
- Z
- Zylindrische Kammer
- K
- Kanal
- A
- Austritt
- I
- Lanzenlängsachse
- r
- Radius Kammersegmentecke
Claims (11)
- Lanzenkopf einer wassergekühlten Blaslanze zur Behandlung von Schmelzen, insbesondere zum Aufblasen von Sauerstoff auf Stahlschmelzen in einem Konverter, mit mindestens einer von einem den engsten Düsenquerschnitt aufweisenden Rohrabschnitt ausgehend sich in Richtung Badoberfläche konisch erweiternden Expansionsdüse,
dadurch gekennzeichnet,daß die Expansionsdüse im Anschluß an dem den kritischen Querschnitt aufweisenden Rohrabschnitt (12) eine erste konische Erweiterung (21) aufweist, die in einem zylindrischen Kanal (22) mündet,daß im Kanal (22) mit einem Abstand (LK1) zur Mündung der ersten konischen Erweiterung (21) mindestens eine Ringkammer (23) vorgesehen ist, und daß sich an die Ringkammer (23) ein zumindest teilweise sich konisch erweiternder Düsenteil (24, bzw. 25, 26) bis zur Mündung (29) der Expansionsdüse anschließt. - Lanzenkopf nach Anspruch 1;
dadurch gekennzeichnet,
daß die Ringkammer (23) in mehrere Kammersegmente (31 bis 34) aufgeteilt ist. - Lanzenkopf nach Anspruch 2,
dadurch gekennzeichnet,
daß die Außenwandungen (36) der Kammersegmente (31 bis 34) kreisbogenförmig sind, wobei die Kammersegmente (31, 33 bzw. 32, 34) paarweise gegenüberliegend angeordnet sind und dabei unterschiedliche Radien (R) aufweisen. - Lanzenkopf nach Anspruch 3,
dadurch gekennzeichnet,
daß die Außenwandungen (36) der Kammersegmente (31 bis 34) kurvenförmig mit kontinuierlich sich vergrößemden Radien (r) ausgestaltet sind. - Lanzenkopf nach einem der Ansprüche 3 oder 4,
dadurch gekennzeichnet,
daß die Kammersegmente (31 bis 34) durch Stege (35) voneinander getrennt sind. - Lanzenkopf nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
daß in die Ringkammer (23) mehr als eine eine geradzahlige Anzahl von Kammersegmenten aufweisende Scheibe (37, 38) eingelegt ist. - Lanzenkopf nach Anspruch 6,
dadurch gekennzeichnet,
daß die Scheiben (37, 38) bei Anpassung ihrer Stege (35) so zueinander verdreht sind, daß in Strömungsrichtung die Kammersegmente mit kleinem Radius (31, 33) sich mit denen mit großem Radius (32, 34) abwechseln. - Lanzen kopf nach einem der o.g. Ansprüche,
dadurch gekennzeichnet,
daß die Abmessungen der Kammersegmente in der Weise ausgestaltet sind, daß Schwingfrequenzen des Gases von 200 bis 2000 Hz erreichbar sind. - Lanzenkopf nach Anspruch 8,
dadurch gekennzeichnet,
daß der Schwingbereich bei Frequenzen von 600 bis 800 Hz einstellbar sind. - Lanzenkopf nach Anspruch 1,
dadurch gekennzeichnet,
daß in Strömungsrichtung vor dem zylindrischen Kanal (22) eine einen größeren Durchmesser als die erste konische Erweiterung (21) aufweisende Vorstufe (27) vorgesehen ist. - Lanzenkopf nach den Ansprüchen 1 oder 10,
dadurch gekennzeichnet,
daß der Durchmesser (DM) der Mündung der ersten konischen Erweiterung (21) kleiner ist als der Durchmesser (DK) des Kanals (22).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19529932 | 1995-08-02 | ||
DE19529932A DE19529932C1 (de) | 1995-08-02 | 1995-08-02 | Lanzenkopf einer Blaslanze zur Behandlung von Schmelzen |
PCT/DE1996/001444 WO1997005290A1 (de) | 1995-08-02 | 1996-07-29 | Lanzenkopf einer blaslanze zur behandlung von schmelzen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0842303A1 EP0842303A1 (de) | 1998-05-20 |
EP0842303B1 true EP0842303B1 (de) | 1999-03-24 |
Family
ID=7769494
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96931738A Expired - Lifetime EP0842303B1 (de) | 1995-08-02 | 1996-07-29 | Lanzenkopf einer blaslanze zur behandlung von schmelzen |
Country Status (7)
Country | Link |
---|---|
US (1) | US6033621A (de) |
EP (1) | EP0842303B1 (de) |
JP (1) | JPH11500492A (de) |
AT (1) | ATE178100T1 (de) |
AU (1) | AU7082696A (de) |
DE (2) | DE19529932C1 (de) |
WO (1) | WO1997005290A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT408348B (de) * | 1999-12-20 | 2001-10-25 | Voest Alpine Ind Anlagen | Verfahren und vorrichtung zum zuführen eines gases in ein metallurgisches gefäss |
DE102009025873A1 (de) * | 2009-05-27 | 2010-12-02 | Saar-Metallwerke Gmbh | Verwendung einer höhenkompensierenden Düse |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1190915A (en) * | 1966-10-04 | 1970-05-06 | Martin Electrical Equipment & | An Improved Lance Head for the Production of Steel by the Linzer-Dusenverfahren Process |
DE1811512B1 (de) * | 1968-11-28 | 1970-06-18 | Nippon Kokan Kk | Blasduese fuer Sauerstoff und Brennstoff,insbesondere fuer Herdschmelzoefen |
DE3509795C1 (de) * | 1985-03-19 | 1986-06-05 | Klöckner CRA Technologie GmbH, 4100 Duisburg | Wassergekuehlte Blaslanze zum Aufblasen von Sauerstoff auf eine Metallschmelze |
CA1293121C (en) * | 1985-08-20 | 1991-12-17 | Nobuyoshi Takashiba | Lance for blow-refinement in converter |
AT384033B (de) * | 1986-02-03 | 1987-09-25 | Voest Alpine Ag | Blaslanze zur behandlung von schmelzen |
SE511424C2 (sv) * | 1993-12-30 | 1999-09-27 | Stiftelsen Metallurg Forsk | Ringspaltdysa och sätt att blåsa en metallsmälta |
-
1995
- 1995-08-02 DE DE19529932A patent/DE19529932C1/de not_active Expired - Fee Related
-
1996
- 1996-07-29 AT AT96931738T patent/ATE178100T1/de not_active IP Right Cessation
- 1996-07-29 JP JP9507117A patent/JPH11500492A/ja active Pending
- 1996-07-29 DE DE59601512T patent/DE59601512D1/de not_active Expired - Fee Related
- 1996-07-29 US US09/011,008 patent/US6033621A/en not_active Expired - Fee Related
- 1996-07-29 AU AU70826/96A patent/AU7082696A/en not_active Abandoned
- 1996-07-29 EP EP96931738A patent/EP0842303B1/de not_active Expired - Lifetime
- 1996-07-29 WO PCT/DE1996/001444 patent/WO1997005290A1/de active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
JPH11500492A (ja) | 1999-01-12 |
EP0842303A1 (de) | 1998-05-20 |
DE59601512D1 (de) | 1999-04-29 |
AU7082696A (en) | 1997-02-26 |
ATE178100T1 (de) | 1999-04-15 |
US6033621A (en) | 2000-03-07 |
DE19529932C1 (de) | 1997-01-16 |
WO1997005290A1 (de) | 1997-02-13 |
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