WO1997000973A1 - Tuyere de soufflage avec nez de lance soude pour le brassage de bains - Google Patents
Tuyere de soufflage avec nez de lance soude pour le brassage de bains Download PDFInfo
- Publication number
- WO1997000973A1 WO1997000973A1 PCT/BE1996/000068 BE9600068W WO9700973A1 WO 1997000973 A1 WO1997000973 A1 WO 1997000973A1 BE 9600068 W BE9600068 W BE 9600068W WO 9700973 A1 WO9700973 A1 WO 9700973A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nose
- nozzle according
- nozzle
- outlet
- welding
- Prior art date
Links
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
-
- 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
- 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
- C21C5/4646—Cooling arrangements
Definitions
- the present invention relates to a blowing nozzle comprising a lance nose intended to be turned towards a steel melting bath or chemical reactor respectively comprising a front face and a set of at least two substantially concentric tubes, said front face being constituted made of a material with high thermal conductivity, in particular electrolytic copper.
- the front face of the nozzle is made of electrolytic copper allowing good heat evacuation by its known property of good thermal conductivity. It is known to attach said front face to said steel tubes by welding or brazing.
- the welds traditionally used in the steel industry, and even metallurgical or chemical have the disadvantage of being produced only with difficulty for precisely metallurgical reasons, while allowing leaks to appear. Thus, leaks are generated at the level of the copper-steel solder junction zones.
- existing noses are quickly decommissioned, requiring fairly frequent nose replacements during production, which is annoying.
- the invention aims to remedy these drawbacks.
- the attachment of said front face to said tubes is carried out by high energy welding.
- the aforementioned nose is made of several nose elements, each nose element being made of a material selected selectively according to the function to be fulfilled by the respective nose element and said nose elements are all fixed by high energy welding, in particular by laser welding.
- the aforementioned welding is carried out by electron beam. Thanks to this particular type of welding, copper-steel junctions are obtained, the welding of which is easy to perform.
- the lance nose according to the invention From the extremely low wear in service obtained thanks to the lance nose according to the invention, it results that the working parameters are made particularly stable throughout the life of the lance nose and it is thus obtained as a very remarkable advantage that an easy automation of steel production can be implemented. Indeed, the behavior and the reliability being improved, less monitoring is necessary. As for the frequency of replacement of the lance nose, it is significantly reduced, which avoids interruptions in the production process due to maintenance or replacement of the nose.
- the nozzles of known nozzles on the other hand, have a clear tendency to wear fairly quickly. The distribution as to the duration of the known noses is very spread out, while with the invention, a good quality of reproducibility is obtained given the stability of the parameters of construction of the nose.
- a problem which is still grafted here resides in the fact that the nose which has outlet orifices also made of electrolytic copper for the same reasons of good thermal conductivity, erodes fairly quickly at the level of said outlet orifices, in particular in the case of oxygen blowing. Indeed, the problem of longevity of the nose in the presence of oxygen blowing is particularly acute given the very abrasive action of the latter. This ends up leading to a loss of efficiency of the oxygen lance and even to a malfunction of the latter which results from the dispersion of the jet caused by the abovementioned erosion causing what is called the umbrella effect, which reduces the efficiency of the bath's stirring.
- the nozzle is made of a material specially intended for this purpose, in particular an anti-wear bronze.
- the nozzle itself is made of an erosion-resistant material. This is precisely made possible thanks to yet another advantage of the fact of attaching the front face to the tubes by electron beam welding, residing in the fact that this allows welding without stress, even weak, and without deformation of the welding area. This has the effect that the nozzle exposed to the erosion phenomenon can thus be produced so as to effectively combat it.
- the nozzle is provided with at least a certain number of outlet orifices, advantageously at least three, making it possible to ensure, in combination with their resistance considerably increased, a more regular fusion or reaction bath. This measure thus contributes to significantly improving the stirring of the abovementioned bath.
- FIG. 1 represents a view in longitudinal section of an oxygen lance nose of a nozzle according to the invention.
- FIG. 2 represents a partial view of a nozzle similar to FIG. 1.
- Figures 3 and 4 show views similar to the Figure 2 of a nozzle variant according to the invention flanked by an additional functional element.
- Figures 5 and 6 show views of elements identical to Figures 3 and 4 with schematic representation of the flow profiles of the pass-through blowing and cooling fluids.
- the present invention relates to blowing nozzles for both steel and chemical applications, with lance noses pointing both towards a fusion bath and towards a chemical reactor respectively in each of which mixtures of liquid masses must be managed.
- the description below will be more specifically directed to the field of steelmaking application, in particular oxygen blowing nozzles with oxygen lance noses for clarity.
- the oxygen lance nose 1 illustrated in longitudinal section in FIG. 1 comprises a central duct 10, practically cylindrical with a longitudinal axis i intended for the passage of oxygen to be directed over a fusion bath not shown.
- said central duct 10 Upstream, said central duct 10 has an inlet opening 11 and downstream, the outlet is subdivided into a certain number of outlet openings 12 forming the inlet of corresponding outlet ducts 14, which each lead to orifices of outlet 16.
- the inner section of the central duct 10 has at least one zone 13 in which it narrows so as to cause an acceleration of the oxygen passing in the directions of the arrows indicated respectively by Fl and F2. This acceleration phenomenon is further increased from the inlet of the outlet conduits 14, the useful cross-section of the oxygen passage being each time greatly reduced by the arrangement of several outlet orifices with a greatly reduced section compared to to central duct 10.
- the outlet orifices 16, for example three in number, are advantageously arranged in a ring around the longitudinal axis i.
- the respective longitudinal axes m of the outlet conduits 14 are slightly inclined at an angle a with respect to the longitudinal axis l of the central conduit 10 so as to obtain a divergent nozzle, the problem of premature wear arising here with even more acuity.
- rapid erosion of the outlet conduits 14 would also have the consequence of excessively increasing the angle aperture of the diverging ⁇ , which would inevitably lead to malfunction of the lance.
- the precipitated erosion of the nozzle which can thus be caused then leads to a considerable loss of efficiency of the blowing nozzle which can then lead to downgrading of the latter, in known cases.
- the outlet conduits 14, in particular the downstream end zones 15 thereof situated at the height of the respective outlet orifices 16, are made of a very resistant material so as to effectively combat the phenomenon of erosion, despite a greatly increased speed of oxygen passing in the direction indicated by arrow F3, which in addition is generally charged with very abrasive dust.
- the nozzle also has at least one, preferably a set of at least two conduits 20, 30 having the same substantially cylindrical appearance as the central conduit 10 and concentric with it. Between said conduits or inner tube 10, intermediate tube 20, and outer 30 are formed substantially annular spaces 21, 23 serving as a cooling fluid supply circuit. Schematic representations of the circuits and trajectories of the fluids are shown in Figures 5 and 6.
- conduits 20, 30 also serve as mechanical support for a front part 40 constituting the nose proper and which is intended to be turned in the direction of the melt.
- This part 40 is made of a material allowing excellent heat dissipation, preferably copper, thanks to its good thermal conductivity.
- Said front part 40 is attached to the outer pipe or tube 30 at a junction zone 51, 52, the fixing being carried out by welding.
- conventional copper-steel welds are only made with difficulty for metallurgical reasons. In addition, they reveal leaks, leaks thus being generated at the level of said junction zones 52.
- the welding of said copper-steel junction zones is not only easily achievable since it makes it possible to operate by direct welding, without the addition of welding material, but also, the weld obtained has a seal. optimal, including temperature.
- the cooling circuit 81 is perfectly sealed.
- An additional advantage of electron beam welding is linked to the fact that it makes it possible to weld without stress, even a small one, and without deformation, which makes it possible to produce the nozzle, normally subject to strong erosion, in a material hypresistant especially intended for this purpose.
- the nozzle itself is constructed from an erosion-resistant material, the front piece 40 being initially in one piece.
- the nozzle according to the invention has a considerably prolonged life, the base nozzle allowing the flow of oxygen at high speed, making it possible moreover to transfer the calories absorbed due to the proximity of the bath of coolant melting, sealing the cooling circuit and resisting abrasion and wear on divergent outlet pipes, caused by the passage of oxygen, often loaded with particles, at high speed abrasive.
- Tests have shown that the life of the nozzles according to the invention can be up to at least 500 flows, which represents a significant leap forward compared to known times, i.e. practically a doubling of the lifetime.
- better stability and resistance to erosion of the divergents m allows much more reliable use of the equipment.
- the nose is made of several elements, in particular the end zones of the conduits 15, the outer tube 30, the intermediate outer tube 31, the cap 32, and the "divergent" 33, which are made of a material judiciously chosen according to the functional role that each of them must play.
- the modular design of the nose 1 is such as to simplify the possibility of modifying the geometry thereof, in particular as regards the angles ot, diameter of the outlet orifices, etc.
- This faculty of replacement by module is particularly important in the event nose development when you want to switch from a given brewing application to another.
- the replacement of nose elements in the event of a defect can be done selectively.
- the cost price of the modification of the nose is considerably reduced.
- the modular design of the nose thus produced makes it possible to adapt the number of outlet conduits, or even to replace these by an uninterrupted ring so as to produce a continuous annular jet, as illustrated in FIG. 4.
- Another problem encountered during blowing at high flow rates such as, for example, 500 m 3 / hour is erosion by cavitation of the center of the nose.
- This erosion is controlled by the arrangement, in the center of the nose, of a deflector 60 advantageously made of the same material as the outlet conduits 14.
- This deflector 60 has a concave shape adapted to the speed of exit of the oxygen, and it is tightly attached to the nose, preferably by electron beam or other suitable means. It also serves in its internal part 61 as a deflector for the cooling fluid as visible in FIGS. 5 and 6.
- blowing rates can go up to 800 m 3 / hour or 1000 m 3 / hour, or even up to 1200 m 3 / hour.
- the higher speeds can cause a cavitation movement causing a return movement of the currents or stirring fluxes, which can cause a perforation of the central element 90.
- the formation of such a piercing can be avoided by virtue of the appropriate arrangement of the external deflector element 60, preferably practically at the center of the longitudinal axis i.
- an internal deflector 70 intended to appropriately divert the oxygen leaving the central duct 10 to engage in the outlet conduits 14.
- the internal deflector 70 also serves to pump calories. Thanks to its projecting shape more pronounced upstream 71 in the direction flow, it effectively acts as a current divider, while its slightly projecting shape downstream 72 ensures good guidance of the mixing flows.
- Upstream projections 61; 71 can have a rather rounded shape as shown in FIG. 1 or pointed as shown in FIG. 2.
- the downstream protruding part may advantageously have, on either side of the end 62, concave parts 63 attached thereto to ensure perfect guidance and avoid any formation of vortex currents in this area.
- each of the cooling circuits 81 have a profile particularly suitable for the proper flow of the coolant at the downstream ends of the cooling circuit, such as a duckbill section as shown in FIGS. 1 to 3.
- a flow mode of the coolants relative to the stirring flow formed by the flow of oxygen is shown in FIG. 5.
- the direction of flow G of the coolant in the coolant channel 21 adjacent to the tube central 10 can be reversed with respect to the direction of flow F2 of oxygen so as to increase the cooling effect by promoting the transfer of heat from one to the other.
- FIG. 4 Another alternative embodiment as regards the cooling circuits is illustrated in FIG. 4.
- This in fact shows the arrangement of two circuits of cooling, one side 81 as in the case of FIG. 2, and the other central 82 allowing a separation into cooling circuits of outside water 82 and inside 81 so as to cool the central axis of the nose.
- the presence of the interior cooling circuit 81 which is central makes it possible to cool, directly and with all the force of the current, the peak deflector 60 corresponding to the exterior deflector indicated above, as illustrated in FIG. 6.
- FIGS. 5 and 6 clearly illustrates that the arrangement of the deflectors favorably influences the flow of fluids by appreciably eliminating the possibilities of formation of vortex zones.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Nozzles (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Arc Welding In General (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Furnace Charging Or Discharging (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU62954/96A AU6295496A (en) | 1995-06-23 | 1996-06-24 | Nozzle with a welded lance head for melt agitation |
BR9609351A BR9609351A (pt) | 1995-06-23 | 1996-06-24 | Tubeira injetora com nariz de agulheta soldado para a misturação de banhos |
JP9503477A JPH11508324A (ja) | 1995-06-23 | 1996-06-24 | 浴撹拌の為の溶接されたランスヘッドをもつ噴射ノズル |
DE69603485T DE69603485T2 (de) | 1995-06-23 | 1996-06-24 | Blaslanze mit angeschweisstem duesenkopf zum aufblasen von gas auf baeder |
EA199800081A EA000183B1 (ru) | 1995-06-23 | 1996-06-24 | Фурма со сварным сопловым наконечником для продувки расплава |
EP96921838A EP0833949B1 (fr) | 1995-06-23 | 1996-06-24 | Tuyere de soufflage avec nez de lance soude pour le brassage de bains |
US09/435,469 US6234406B1 (en) | 1995-06-23 | 1999-11-08 | Blasting nozzle with welded lance head for the agitation of baths |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE9500556A BE1009743A3 (fr) | 1995-06-23 | 1995-06-23 | Tuyere de soufflage a oxygene siderurgique. |
BE9500556 | 1995-06-23 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US97320397A Continuation | 1995-06-23 | 1997-12-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997000973A1 true WO1997000973A1 (fr) | 1997-01-09 |
Family
ID=3889058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/BE1996/000068 WO1997000973A1 (fr) | 1995-06-23 | 1996-06-24 | Tuyere de soufflage avec nez de lance soude pour le brassage de bains |
Country Status (13)
Country | Link |
---|---|
US (1) | US6234406B1 (fr) |
EP (1) | EP0833949B1 (fr) |
JP (1) | JPH11508324A (fr) |
KR (1) | KR100447097B1 (fr) |
CN (1) | CN1064998C (fr) |
AT (1) | ATE182630T1 (fr) |
AU (1) | AU6295496A (fr) |
BE (1) | BE1009743A3 (fr) |
BR (1) | BR9609351A (fr) |
DE (1) | DE69603485T2 (fr) |
EA (1) | EA000183B1 (fr) |
ES (1) | ES2136423T3 (fr) |
WO (1) | WO1997000973A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1211327A3 (fr) * | 2000-12-04 | 2003-11-26 | ThyssenKrupp Stahl AG | Lance de soufflage |
US6849228B2 (en) | 2000-09-15 | 2005-02-01 | Jacques Thomas | Blowing lance nozzle |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI20020750A (fi) * | 2002-04-19 | 2003-10-20 | Outokumpu Oy | Menetelmä jäähdytyselementin valmistamiseksi ja jäähdytyselementti |
US7317179B2 (en) * | 2005-10-28 | 2008-01-08 | Cymer, Inc. | Systems and methods to shape laser light as a homogeneous line beam for interaction with a film deposited on a substrate |
US20070246869A1 (en) * | 2006-04-21 | 2007-10-25 | Berry Metal Company | Metal making lance tip assembly |
DE102006042794A1 (de) * | 2006-09-08 | 2008-01-17 | Siemens Ag | Lanzenkopf sowie Verfahren zum Herstellen eines Lanzenkopfes |
CN101363623B (zh) * | 2007-08-06 | 2010-12-08 | 国际壳牌研究有限公司 | 燃烧器 |
CN101363626B (zh) | 2007-08-06 | 2015-05-20 | 国际壳牌研究有限公司 | 制造燃烧器前脸的方法 |
US8070483B2 (en) * | 2007-11-28 | 2011-12-06 | Shell Oil Company | Burner with atomizer |
DE102009025873A1 (de) | 2009-05-27 | 2010-12-02 | Saar-Metallwerke Gmbh | Verwendung einer höhenkompensierenden Düse |
JP5501823B2 (ja) * | 2010-03-30 | 2014-05-28 | 株式会社キャステム | 成形金型の製造方法 |
US8881995B2 (en) * | 2010-09-29 | 2014-11-11 | Delavan Inc | Carbon contamination resistant pressure atomizing nozzles |
KR101117262B1 (ko) * | 2011-06-09 | 2012-03-16 | 주식회사 서울엔지니어링 | 열전도성과 내마모성이 우수한 란스 헤드 및 그 제조방법 |
BE1023582B1 (fr) * | 2016-04-15 | 2017-05-09 | Soudobeam Sa | Nez de lance de soufflage |
BE1023609B1 (fr) * | 2016-04-15 | 2017-05-16 | Soudobeam Sa | Nez de lance de soufflage |
WO2017178608A1 (fr) * | 2016-04-15 | 2017-10-19 | Soudobeam Sa | Nez de lance de soufflage |
KR102581162B1 (ko) * | 2021-03-27 | 2023-09-21 | 주식회사 서울엔지니어링 | 란스 헤드 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT313945B (de) * | 1969-08-14 | 1974-03-11 | Voest Ag | Düsenkopf für Sauerstoffblaslanzen und Brennerlanzen und Verfahren zur Herstellung desselben |
US4190238A (en) * | 1978-05-11 | 1980-02-26 | Stahlwerke Peine-Salzgitter Ag | Lance head for a fining lance |
DE3700892A1 (de) * | 1986-02-03 | 1987-08-06 | Voest Alpine Ag | Blaslanze zur behandlung von schmelzen |
EP0340207A1 (fr) * | 1988-04-25 | 1989-11-02 | VOEST-ALPINE INDUSTRIEANLAGENBAU GESELLSCHAFT m.b.H. | Lance de soufflage |
EP0510518A1 (fr) * | 1991-04-26 | 1992-10-28 | Heinrich Dr. Hampel | Procédé pour la fabrication d'une tête d'injection refroidie à l'eau pour une lance de soufflage |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1433514A1 (de) * | 1964-01-09 | 1969-04-03 | Hoerder Huettenunion Ag | Vorrichtung zum Blasen von Gasen auf oder in eine Metallschmelze |
US3322419A (en) * | 1964-12-24 | 1967-05-30 | Union Carbide Corp | Oxygen jet devices |
US3559974A (en) * | 1969-03-03 | 1971-02-02 | Berry Metal Co | Oxygen lances having a high resistance to deterioration and multipiece nozzle heads therefor |
US3730505A (en) * | 1970-07-01 | 1973-05-01 | Centro Speriment Metallurg | Double delivery lance for refining the steel in the converter processes |
US3750952A (en) * | 1970-08-05 | 1973-08-07 | Voest Ag | Nozzle-head for a water-cooled blowing lance |
US3647147A (en) * | 1970-12-23 | 1972-03-07 | Norton Co | Spray nozzle orifice member |
US4052005A (en) * | 1976-03-11 | 1977-10-04 | Berry Metal Company | Oxygen lance nozzle |
US4301969A (en) * | 1980-02-25 | 1981-11-24 | Sharp Kenneth C | Oxygen lance nozzle |
FR2521167B1 (fr) * | 1982-02-10 | 1987-04-30 | Siderurgie Fse Inst Rech | Lance d'injection de gaz pour convertisseur metallurgique |
US4632401A (en) * | 1984-07-05 | 1986-12-30 | Smith International, Inc. | Hermetically welded belleville seal for rock bits |
-
1995
- 1995-06-23 BE BE9500556A patent/BE1009743A3/fr not_active IP Right Cessation
-
1996
- 1996-06-24 DE DE69603485T patent/DE69603485T2/de not_active Expired - Lifetime
- 1996-06-24 ES ES96921838T patent/ES2136423T3/es not_active Expired - Lifetime
- 1996-06-24 AT AT96921838T patent/ATE182630T1/de active
- 1996-06-24 EP EP96921838A patent/EP0833949B1/fr not_active Expired - Lifetime
- 1996-06-24 CN CN961949929A patent/CN1064998C/zh not_active Expired - Fee Related
- 1996-06-24 JP JP9503477A patent/JPH11508324A/ja not_active Ceased
- 1996-06-24 KR KR1019970709672A patent/KR100447097B1/ko not_active IP Right Cessation
- 1996-06-24 WO PCT/BE1996/000068 patent/WO1997000973A1/fr active IP Right Grant
- 1996-06-24 EA EA199800081A patent/EA000183B1/ru not_active IP Right Cessation
- 1996-06-24 BR BR9609351A patent/BR9609351A/pt not_active IP Right Cessation
- 1996-06-24 AU AU62954/96A patent/AU6295496A/en not_active Abandoned
-
1999
- 1999-11-08 US US09/435,469 patent/US6234406B1/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT313945B (de) * | 1969-08-14 | 1974-03-11 | Voest Ag | Düsenkopf für Sauerstoffblaslanzen und Brennerlanzen und Verfahren zur Herstellung desselben |
US4190238A (en) * | 1978-05-11 | 1980-02-26 | Stahlwerke Peine-Salzgitter Ag | Lance head for a fining lance |
DE3700892A1 (de) * | 1986-02-03 | 1987-08-06 | Voest Alpine Ag | Blaslanze zur behandlung von schmelzen |
EP0340207A1 (fr) * | 1988-04-25 | 1989-11-02 | VOEST-ALPINE INDUSTRIEANLAGENBAU GESELLSCHAFT m.b.H. | Lance de soufflage |
EP0510518A1 (fr) * | 1991-04-26 | 1992-10-28 | Heinrich Dr. Hampel | Procédé pour la fabrication d'une tête d'injection refroidie à l'eau pour une lance de soufflage |
Non-Patent Citations (1)
Title |
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CHERNYATEVICH A.G,: "Lances for 250 t convertors", STEEL IN THE USSR, vol. 19, no. 2, February 1989 (1989-02-01), LONDON, GB, pages 38 - 40, XP000070900 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6849228B2 (en) | 2000-09-15 | 2005-02-01 | Jacques Thomas | Blowing lance nozzle |
EP1211327A3 (fr) * | 2000-12-04 | 2003-11-26 | ThyssenKrupp Stahl AG | Lance de soufflage |
Also Published As
Publication number | Publication date |
---|---|
US6234406B1 (en) | 2001-05-22 |
DE69603485T2 (de) | 2000-04-27 |
KR19990028357A (ko) | 1999-04-15 |
ES2136423T3 (es) | 1999-11-16 |
CN1188513A (zh) | 1998-07-22 |
EA199800081A1 (ru) | 1998-08-27 |
EA000183B1 (ru) | 1998-12-24 |
EP0833949B1 (fr) | 1999-07-28 |
JPH11508324A (ja) | 1999-07-21 |
KR100447097B1 (ko) | 2004-11-06 |
CN1064998C (zh) | 2001-04-25 |
BR9609351A (pt) | 1999-06-15 |
EP0833949A1 (fr) | 1998-04-08 |
AU6295496A (en) | 1997-01-22 |
DE69603485D1 (de) | 1999-09-02 |
ATE182630T1 (de) | 1999-08-15 |
BE1009743A3 (fr) | 1997-07-01 |
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