EP0646183A1 - Process and device for blowing oxygen over metal melts - Google Patents
Process and device for blowing oxygen over metal meltsInfo
- Publication number
- EP0646183A1 EP0646183A1 EP93909350A EP93909350A EP0646183A1 EP 0646183 A1 EP0646183 A1 EP 0646183A1 EP 93909350 A EP93909350 A EP 93909350A EP 93909350 A EP93909350 A EP 93909350A EP 0646183 A1 EP0646183 A1 EP 0646183A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oxygen
- nozzle
- lance
- blowing lance
- blowing
- 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
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 60
- 239000001301 oxygen Substances 0.000 title claims abstract description 60
- 238000007664 blowing Methods 0.000 title claims abstract description 27
- 239000002184 metal Substances 0.000 title claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 13
- 239000000155 melt Substances 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 150000002926 oxygen Chemical class 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical group O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 241000973497 Siphonognathus argyrophanes Species 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000004941 influx Effects 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- 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
- F27D2003/162—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel
- F27D2003/163—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel the fluid being an oxidant
- F27D2003/164—Oxygen
Definitions
- the aim is, among other things, a large bath surface and a possibly large reaction space in the container to achieve a high one
- EP 0 081 448 B1 discloses a method and a device for freshening a steel bath by means of oxygen inflation lances, in which the oxygen hits the bath surface at a speed in the supersonic range. The entire oxygen flow is divided into a hard and a soft jet.
- the oxygen stream strikes the surface of the steel bath in a relatively limited area, forms a deep outflow in the bath and throws metal droplets into the gas space above the melt.
- the oxygen stream strikes the surface of the steel bath in a relatively limited area, forms a deep outflow in the bath and throws metal droplets into the gas space above the melt.
- the invention has set itself the goal of a method and a
- the oxygen flow is pulsed and compressed within the lance.
- the blowing lance has wear-free elements in the nozzle and pocket tube.
- the oxygen flow entering the lance is accelerated by an annular nozzle and thereby pulsed to an accelerated and compressed plug.
- the oxygen plug hits the mouth of the sack tube and is separated into two parts, one oxygen core and one
- Oxygen screen The accelerated and compressed oxygen core flows into the bag tube, fills it and bounces at the closed end of the bag tube. After impacting the floor of the
- Sac tube flows the oxygen core towards the mouth of the
- Oxygen core on the oxygen plug flowing through the ring nozzle Those moving in opposite directions
- Oxygen torus largely forms a plug again. This toroidal plug leaves the lance through holes.
- Design of the hole is influenced on the
- the oxygen bell thus formed creates a stable system of high intensity toroidal vortices in the melt
- the laval-shaped nozzles provided at the head end of the blowing lance have stabilizing elements with which influence on the position of the
- Oxygen core as well as the shape of the oxygen screen is taken.
- Fig. 3 nozzle with stabilizing element.
- FIG. 1 shows a vacuum level 10 with a vacuum container 11 on which a vacuum hood 12 rests.
- the vacuum hood 12 has one
- a passage 13 is provided through which a blowing lance 40 can be guided to the pan 30 placed in the vacuum position.
- the blowing lance 40 is fastened to a carriage 22 which is arranged to be movable on a frame 21 of a lance device 20.
- the pan 30 has a pan vessel 31 which can be closed by a pan lid 32.
- the pan lid 32 has a lid opening 33 through which the blowing lance 40 can be guided.
- a rinsing device 34 is provided as well as a closure 35 for shutting off the tap opening.
- the melt 39 is in the pan.
- Fig. 2 shows the blow punch 40 with the wall 41, in the
- a ring nozzle 42 is arranged at the bottom end.
- Nozzles 50 are provided on the head-end part of the blowing lance 40.
- a pocket tube 44 is arranged on the Lanzenmit tenachse I, the mouth 45 facing the ring nozzle 42 and the bottom 46 to the nozzle 50.
- a compartment space 43 is located between the pocket tube mouth 45 and the ring nozzle 42. Between the pocket tube base 46 and the nozzle 50 there is a pre-nozzle space 48. The compartment space 43 and the pre-nozzle space 48 are connected via an annular channel 47.
- the nozzle 50 has a stabilizing element 51.
- a displacement body 49 is arranged in the center of the ring nozzle 42.
- the inner radius of the wall 41 is D
- the distance of the ring nozzle 42 to the mouth 45 of the pocket tube 44 is a
- the length of the pre-nozzle space 48 is b
- the nozzle diameter in the narrowest cross section is d O
- FIG 3 shows a nozzle 50.
- the narrowest cross section of the laval-shaped nozzle 50 has a diameter d o and one
- Nozzle outlet cross section d a is one
- Stabilizing element 51 has the shape of a tubular collar with an inner diameter d i and a length l.
- the oxygen jet 60 is shown, which has a core 61 and a screen 62 surrounding it.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Materials For Medical Uses (AREA)
- Sampling And Sample Adjustment (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
- Furnace Charging Or Discharging (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4221266A DE4221266C1 (en) | 1992-06-26 | 1992-06-26 | Method and device for inflating oxygen on molten metals |
| DE4221266 | 1992-06-26 | ||
| PCT/DE1993/000362 WO1994000604A1 (en) | 1992-06-26 | 1993-04-22 | Process and device for blowing oxygen over metal melts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0646183A1 true EP0646183A1 (en) | 1995-04-05 |
| EP0646183B1 EP0646183B1 (en) | 1999-01-07 |
Family
ID=6462053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93909350A Expired - Lifetime EP0646183B1 (en) | 1992-06-26 | 1993-04-22 | Process and device for blowing oxygen over metal melts |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US5571307A (en) |
| EP (1) | EP0646183B1 (en) |
| JP (1) | JPH08500852A (en) |
| KR (1) | KR950702253A (en) |
| AT (1) | ATE175448T1 (en) |
| AU (1) | AU3979393A (en) |
| BR (1) | BR9306620A (en) |
| DE (2) | DE4221266C1 (en) |
| WO (1) | WO1994000604A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12064101B2 (en) | 2006-02-03 | 2024-08-20 | Biomet Sports Medicine, Llc | Method and apparatus for forming a self-locking adjustable loop |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4442362C1 (en) * | 1994-11-18 | 1996-04-18 | Mannesmann Ag | Method and appts. for performing a variety of processes on a melt using standard equipment |
| DE19518900C1 (en) * | 1995-05-26 | 1996-08-08 | Technometal Ges Fuer Metalltec | After-burning reaction gases arising during vacuum treatment of steel |
| KR100270113B1 (en) * | 1996-10-08 | 2000-10-16 | 이구택 | Ultra-low carbon steels for molten steel production |
| DE19755876C2 (en) | 1997-12-04 | 2000-02-24 | Mannesmann Ag | Blow lance for treating metallic melts and method for blowing in gases |
| DE19811722C1 (en) * | 1998-03-18 | 1999-09-09 | Sms Vacmetal Ges Fuer Vacuumme | Apparatus for vacuum refining of metal, in particular, steel melts |
| DE19954556A1 (en) * | 1999-11-12 | 2001-05-23 | Messer Griesheim Gmbh | Process for operating a melting furnace |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1433486B2 (en) * | 1962-09-11 | 1972-05-10 | Demag Ag, 4100 Duisburg | PROCESS AND REFRESHING AGENT FOR REFRESHING MELT BATHS IN METALLURGICAL VESSELS, IN PARTICULAR PIG IRON IN CONVERTERS |
| CA1030354A (en) * | 1973-10-22 | 1978-05-02 | Sumitomo Metal Industries, Ltd. | Process for the vacuum decarburization |
| US4057421A (en) * | 1974-10-22 | 1977-11-08 | Sumitomo Metal Industries Limited | Process for vacuum decarburization of steel |
| DE2709234B1 (en) * | 1977-03-03 | 1978-04-06 | Salzgitter Peine Stahlwerke | Device for blowing pig iron |
| DE3176405D1 (en) * | 1981-06-19 | 1987-10-08 | Karl S Koller | Energy absorbing load carrying strut and method of providing such a strut capable of withstanding cyclical loads exceeding its yield strength |
| LU83814A1 (en) * | 1981-12-04 | 1983-09-01 | Arbed | METHOD AND DEVICE FOR REFINING A METAL BATH CONTAINING SOLID COOLING MATERIALS |
| US4426224A (en) * | 1981-12-25 | 1984-01-17 | Sumitomo Kinzoku Kogyo Kabushiki Gaisha | Lance for powder top-blow refining and process for decarburizing and refining steel by using the lance |
| US4746103A (en) * | 1985-08-20 | 1988-05-24 | Kawasaki Steel Corporation | Lance for blow-refinement in converter |
| CA1337846C (en) * | 1988-06-21 | 1996-01-02 | Hiroshi Nishikawa | Process for vacuum degassing and decarbonization with temperature drop compensating feature |
| LU87856A1 (en) * | 1990-12-10 | 1992-08-25 | Arbed | BLOWING LANCE |
| LU87855A1 (en) * | 1990-12-10 | 1992-08-25 | Arbed | BLOWING LANCE |
-
1992
- 1992-06-26 DE DE4221266A patent/DE4221266C1/en not_active Expired - Fee Related
-
1993
- 1993-04-22 JP JP6501927A patent/JPH08500852A/en active Pending
- 1993-04-22 AU AU39793/93A patent/AU3979393A/en not_active Abandoned
- 1993-04-22 DE DE59309281T patent/DE59309281D1/en not_active Expired - Fee Related
- 1993-04-22 BR BR9306620A patent/BR9306620A/en not_active Application Discontinuation
- 1993-04-22 US US08/360,742 patent/US5571307A/en not_active Expired - Fee Related
- 1993-04-22 EP EP93909350A patent/EP0646183B1/en not_active Expired - Lifetime
- 1993-04-22 WO PCT/DE1993/000362 patent/WO1994000604A1/en not_active Ceased
- 1993-04-22 KR KR1019940704743A patent/KR950702253A/en not_active Abandoned
- 1993-04-22 AT AT93909350T patent/ATE175448T1/en not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9400604A1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12064101B2 (en) | 2006-02-03 | 2024-08-20 | Biomet Sports Medicine, Llc | Method and apparatus for forming a self-locking adjustable loop |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE175448T1 (en) | 1999-01-15 |
| AU3979393A (en) | 1994-01-24 |
| JPH08500852A (en) | 1996-01-30 |
| DE4221266C1 (en) | 1993-10-21 |
| DE59309281D1 (en) | 1999-02-18 |
| BR9306620A (en) | 1998-12-08 |
| EP0646183B1 (en) | 1999-01-07 |
| KR950702253A (en) | 1995-06-19 |
| US5571307A (en) | 1996-11-05 |
| WO1994000604A1 (en) | 1994-01-06 |
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| DE19755876C2 (en) | Blow lance for treating metallic melts and method for blowing in gases | |
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