WO1999054511A1 - Variabel einsetzbare kombilanze mit verschiebbaren brenner- und blaslanzenkörpern - Google Patents
Variabel einsetzbare kombilanze mit verschiebbaren brenner- und blaslanzenkörpern Download PDFInfo
- Publication number
- WO1999054511A1 WO1999054511A1 PCT/DE1999/001202 DE9901202W WO9954511A1 WO 1999054511 A1 WO1999054511 A1 WO 1999054511A1 DE 9901202 W DE9901202 W DE 9901202W WO 9954511 A1 WO9954511 A1 WO 9954511A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lance
- lance body
- burner
- cooling jacket
- mouth
- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- 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
- F27D2003/168—Introducing a fluid jet or current into the charge through a lance
Definitions
- the invention relates to a lance for treating liquid metal melts located in metallurgical vessels, in particular steel exposed to a vacuum in RH vessels and for heating the RH vessels before or between the treatment phases
- the inner guide tube for guiding gases, in particular oxygen has a head-end lance mouth for inflating the gas and has a first cooling jacket over its entire length and is connected at the foot to a gas and cooling media supply
- the lance for performing a burner function on the outer circumference of the first cooling jacket arranged channels for passing a fuel gas to im Has area of the head-end lance mouth formed, obliquely aligned to the lance axis burner nozzles and the fuel gas channels are enclosed by a second outer cooling jacket.
- a lance for treating metal melts with the aforementioned features is described in DE 44 42 362 Cl.
- the multi-function lance known from this already allows the process steps of inflating oxygen with and without solids as well as generating a burner flame to heat the vessel independently of one another.
- oxygen is blown up, the oxygen is blown up via the inner guide tube provided with a lavai-shaped lance mouth, while fuel gas is supplied to the fuel gas channels during burner operation, so that a combustion reaction occurs in the area of the lance mouth together with the oxygen still escaping there during burner operation to form the desired flame.
- the known multi-function lance has the disadvantage that during the oxygen blowing process and during the subsequent low-vacuum treatment, splashes of slag and / or metal occur due to the sometimes violent reaction of the metal melt to be treated, so that the burner nozzles located at the end of the multi-function lance become clogged and so far are no longer available for a subsequent burner operation. In order to avoid this, it is known to keep the burner nozzles free during the entire process by means of an inert gas introduced into the combustion gas channels, which is correspondingly expensive.
- the invention is therefore based on the object of providing a lance with the features mentioned at the outset, in which both oxygen blowing mode and burner mode are provided independently of one another is, like the burner nozzles, protected against clogging by material splashes, without the need to apply inert gas to the burner nozzles.
- the invention provides in its basic concept that the inner guide tube are formed with first cooling jacket as a first lance body and the combustible gas ducts with second cooling jacket as a second lance body and the first lance body in the second lance body between a 'raised burner operating position and a lowered blowing position slidably disposed in which the burner nozzles are covered by the first lance body, which projects downward over the end of the second lance body.
- the invention has the advantage that the lance can be converted from the oxygen blowing function into the burner function by simply moving the first lance body in the second lance body, the second lance body having the burner nozzles being covered so far by the first lance body during the oxygen blowing operation that the first lance body completely covers the burner nozzles directed obliquely to its longitudinal axis and mechanically protects them from the action of material splashes. An easy-to-use, effective protection of the burner nozzles is thus achieved.
- Another advantage is the existing, so far only for the Lances set up by oxygen blowing operation can be retrofitted by means of a second lance body to be pushed onto them and can be made available as a combination lance for blowing and burner operation.
- the second lance body surrounds the first lance body in a ring, so that burner and blow lance operation can be carried out concentrically to the RH vessel axis.
- the first lance body in the second lance body is steplessly displaceable to set a variable distance of the burner nozzles from the burner mouth of the second lance body.
- This has the particular advantage that, due to the variably adjustable distance of the burner nozzles to the lance mouth for the oxygen outlet, an optimal combustion of the introduced fuel gas can be set up. Since only about 1/5 to 1/10 of the amount of oxygen has to be passed through the inner guide tube of the lance in the burner operation, as compared to the oxygen blowing operation, the Laval nozzle formed in the area of the lance mouth is ineffective, so that completely different discharge conditions of the Result in oxygen in comparison with the oxygen blowing operation.
- the first lance body can be moved by a lifting device attached to the second lance body.
- the second lance body can be made correspondingly shorter.
- the second lance body extends over the entire length of the first lance body and separately arranged lifting devices are provided for the first lance body and the second lance body.
- both lance bodies are guided through the stuffing box arranged in the cover of the treatment vessel, so that the corresponding lifting devices take over the distance control of the two lance heads during burner operation.
- FIG. 1 shows a variable combi-lance in side view with an enlarged sectional view in the foot region thereof in the case of oxygen blowing operation
- Fig. 2 shows the variable combination lance according to Figure 1 in the position during burner operation.
- the combination lance initially has a first lance body 10, which extends over the entire length of the lance and has an inner guide tube 11 for the passage of, in particular, oxygen for the treatment of the molten metal.
- a Laval nozzle 12 At the free end of the first lance body 10 there is a Laval nozzle 12, via which the oxygen is blown onto the bath surface.
- the first lance body 10 has an oxygen connection 13 at its upper end.
- the inner guide tube 11 is enclosed by a first cooling jacket 14, to which a cooling water inlet 15 and a cooling water outlet 16 are assigned in the upper region of the first lance body 10.
- the first lance body 10 is displaceably arranged in the second lance body 17, the second lance body 17 or its cooling jacket 20 enclosing the first lance body in a ring shape.
- Fuel gas channels 18 are formed in the second lance body 17 and open at the lower end thereof into burner nozzles 19 arranged obliquely to the longitudinal axis of the lance.
- the second lance body 17 has an outer second cooling jacket 20, to which a water inlet 21 and a water outlet 22 are assigned.
- the fuel gas channels 18 are connected to a fuel gas supply 23.
- Both lance bodies 10, 17 are guided together through a stuffing box (not shown in the drawing) in the lid of the RH treatment vessel, this lance unit at the beginning or at the end of an oxygen blowing or burner operation over a 4 to 5 m long, vertical travel path into the upper parking position or the lower operating position can be moved by means of a lifting device, not shown in the drawing.
- the second lance body 17 is connected to the outer tube of the cooling jacket 20 and a lance slide of the lifting device (not shown in the drawing) via a clamp connection.
- both lance bodies 10, 17 can be displaced relative to one another and thereby an annular gap is formed between the outer jacket of the first lance body 10 and the inner jacket of the second lance body 17, a vacuum-tight stuffing box 28 surrounding the lance body 10 is arranged at the upper end of the lance body 17.
- a flange 25 is arranged on the second lance body 17, on which two hydraulic cylinders 26 engage, which carry the first lance body 10 connected via an associated flange 24, so that the cylinder 26 is connected to the second lance body 10 outgoing drive the first lance body 10 is arranged displaceably in the second lance body 17.
- the first lance body 10 is in the “lowered” position, in which the end of the first lance body 10 is aligned with the end of the second lance body 17, so that the lance mouth 27 for blowing out the Oxygen from the inner guide tube 11 or the associated Laval nozzle 12 is given.
- the burner nozzles 19 are completely covered by the first lance body 10, so that any material that may be sprayed on cannot reach the burner nozzles 19.
- the burner nozzles 19 are released in the second lance body 17, so that when oxygen continues to escape, a reaction of fuel gas with oxygen occurs in the area of the lance mouth 27 and the desired burner flame is thus obtained is coming.
- the distance between the burner nozzles 19 and the oxygen outlet from the lance mouth 27 can be continuously adjusted via the cylinders 26, so that an optimal control of the combustion reaction is possible.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Gas Burners (AREA)
- Furnace Charging Or Discharging (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Feeding And Controlling Fuel (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59901746T DE59901746D1 (de) | 1998-04-20 | 1999-04-19 | Variabel einsetzbare kombilanze mit verschiebbaren brenner- und blaslanzenkörpern |
AT99927699T ATE219156T1 (de) | 1998-04-20 | 1999-04-19 | Variabel einsetzbare kombilanze mit verschiebbaren brenner- und blaslanzenkörpern |
BR9909769-9A BR9909769A (pt) | 1998-04-20 | 1999-04-19 | Lança combinada, de uso variável, com corpos de lança de queimador e soprador |
US09/673,925 US6368550B1 (en) | 1998-04-20 | 1999-04-19 | Variably insertable combined lance with displaceable burner and blower lance bodies |
EP99927699A EP1080236B1 (de) | 1998-04-20 | 1999-04-19 | Variabel einsetzbare kombilanze mit verschiebbaren brenner- und blaslanzenkörpern |
KR1020007011588A KR20010071159A (ko) | 1998-04-20 | 1999-04-19 | 가동 버너 및 방출 란스 몸체를 가지는 가변 삽입가능한복합 란스 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19817590A DE19817590C1 (de) | 1998-04-20 | 1998-04-20 | Variabel einsetzbare Kombilanze |
DE19817590.6 | 1998-04-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999054511A1 true WO1999054511A1 (de) | 1999-10-28 |
Family
ID=7865189
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/001202 WO1999054511A1 (de) | 1998-04-20 | 1999-04-19 | Variabel einsetzbare kombilanze mit verschiebbaren brenner- und blaslanzenkörpern |
Country Status (10)
Country | Link |
---|---|
US (1) | US6368550B1 (de) |
EP (1) | EP1080236B1 (de) |
KR (1) | KR20010071159A (de) |
CN (1) | CN1214120C (de) |
AT (1) | ATE219156T1 (de) |
BR (1) | BR9909769A (de) |
DE (2) | DE19817590C1 (de) |
ES (1) | ES2180305T3 (de) |
RU (1) | RU2211248C2 (de) |
WO (1) | WO1999054511A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016020376A1 (de) * | 2014-08-08 | 2016-02-11 | Primetals Technologies Austria GmbH | Brenner-lanzen-einheit |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10201108A1 (de) * | 2002-01-15 | 2003-07-24 | Sms Demag Ag | Verfahren zur pyrometallurgischen Behandlung von Metallen, Metallschmelzen und/oder Schlacken sowie eine Injektorvorrichtung |
GB0209364D0 (en) * | 2002-04-24 | 2002-06-05 | Boc Group Plc | Injection of particulate material into liquid |
KR101010777B1 (ko) * | 2003-07-19 | 2011-01-25 | 주식회사 포스코 | 전기로 저온 커팅용 로타리 복합 랜스 |
US7297180B2 (en) * | 2005-07-13 | 2007-11-20 | Praxair Technology, Inc. | Method for operating a vacuum vessel with a coherent jet |
WO2013000017A1 (en) * | 2011-06-30 | 2013-01-03 | Outotec Oyj | Top submerged injecting lances |
CA2844098C (en) * | 2011-09-02 | 2016-01-05 | Outotec Oyj | Lances for top submerged injection |
EP2581462B1 (de) * | 2011-10-10 | 2016-03-02 | Primetals Technologies Germany GmbH | Blaslanze mit Direktzündung durch zurückziehbare Zündlanze |
US8992656B2 (en) * | 2011-12-21 | 2015-03-31 | Praxair Technology, Inc. | Controllable solids injection |
KR101408223B1 (ko) * | 2012-12-10 | 2014-06-16 | 주식회사 포스코 | 화염 감지 장치 및 그를 포함하는 티오비 버너 |
US9068779B2 (en) * | 2013-03-15 | 2015-06-30 | L'Air Liquide SociétéAnonyme Pour L 'Étude Et L Eploitation Des Procedes Georges Claude | Water-cooled burner and/or injector panel kits, water-cooled burner and/or injector panel apparatus, and methods of using the same |
RU2601848C1 (ru) * | 2015-04-21 | 2016-11-10 | Общество с ограниченной ответственностью научно-техническое предприятие "Аконт" (ООО НТП "Аконт") | Устройство для интенсификации плавки в дуговой сталеплавильной печи |
CN105823045A (zh) * | 2016-05-23 | 2016-08-03 | 苏州宝联重工股份有限公司 | 一种rh精炼炉用转炉煤气用烧嘴及rh精炼炉 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2438676A1 (de) * | 1974-08-12 | 1976-02-26 | Kraisinger | Blasform zum zufuehren von reaktionsmitteln in ein metallbad |
DE3301466C1 (de) * | 1983-01-18 | 1984-04-12 | Korf & Fuchs Systemtechnik GmbH, 7601 Willstätt | Brenner bzw. Blasduese fuer den Einsatz in einem metallurgischen Ofen und Anordnung in der Wand eines solchen Ofens |
US4752330A (en) * | 1986-11-21 | 1988-06-21 | American Combustion, Inc. | Method for melting and refining metals |
FR2644558A1 (fr) * | 1989-03-16 | 1990-09-21 | Air Liquide | Four a arc equipe de bruleurs fuel-oil/oxygene et bruleur fuel/oil/oxygene |
DE4442362C1 (de) * | 1994-11-18 | 1996-04-18 | Mannesmann Ag | Verfahren und Vorrichtung zum Behandeln von einer in einem metallurgischen Gefäß befindlichen Metallschmelze |
DE29807145U1 (de) * | 1998-04-20 | 1998-07-02 | Technometal Ges Fuer Metalltec | Variabel einsetzbare Kombilanze |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3972517A (en) * | 1974-08-05 | 1976-08-03 | Fedor Vladimirovich Kraizinger | Tuyere for introducing reactants into a bath of molten metal |
US5714113A (en) * | 1994-08-29 | 1998-02-03 | American Combustion, Inc. | Apparatus for electric steelmaking |
-
1998
- 1998-04-20 DE DE19817590A patent/DE19817590C1/de not_active Expired - Fee Related
-
1999
- 1999-04-19 DE DE59901746T patent/DE59901746D1/de not_active Expired - Lifetime
- 1999-04-19 US US09/673,925 patent/US6368550B1/en not_active Expired - Fee Related
- 1999-04-19 BR BR9909769-9A patent/BR9909769A/pt not_active IP Right Cessation
- 1999-04-19 AT AT99927699T patent/ATE219156T1/de not_active IP Right Cessation
- 1999-04-19 CN CNB998071870A patent/CN1214120C/zh not_active Expired - Fee Related
- 1999-04-19 RU RU2000128669/02A patent/RU2211248C2/ru not_active IP Right Cessation
- 1999-04-19 KR KR1020007011588A patent/KR20010071159A/ko not_active Application Discontinuation
- 1999-04-19 EP EP99927699A patent/EP1080236B1/de not_active Expired - Lifetime
- 1999-04-19 WO PCT/DE1999/001202 patent/WO1999054511A1/de not_active Application Discontinuation
- 1999-04-19 ES ES99927699T patent/ES2180305T3/es not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2438676A1 (de) * | 1974-08-12 | 1976-02-26 | Kraisinger | Blasform zum zufuehren von reaktionsmitteln in ein metallbad |
DE3301466C1 (de) * | 1983-01-18 | 1984-04-12 | Korf & Fuchs Systemtechnik GmbH, 7601 Willstätt | Brenner bzw. Blasduese fuer den Einsatz in einem metallurgischen Ofen und Anordnung in der Wand eines solchen Ofens |
US4752330A (en) * | 1986-11-21 | 1988-06-21 | American Combustion, Inc. | Method for melting and refining metals |
FR2644558A1 (fr) * | 1989-03-16 | 1990-09-21 | Air Liquide | Four a arc equipe de bruleurs fuel-oil/oxygene et bruleur fuel/oil/oxygene |
DE4442362C1 (de) * | 1994-11-18 | 1996-04-18 | Mannesmann Ag | Verfahren und Vorrichtung zum Behandeln von einer in einem metallurgischen Gefäß befindlichen Metallschmelze |
DE29807145U1 (de) * | 1998-04-20 | 1998-07-02 | Technometal Ges Fuer Metalltec | Variabel einsetzbare Kombilanze |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016020376A1 (de) * | 2014-08-08 | 2016-02-11 | Primetals Technologies Austria GmbH | Brenner-lanzen-einheit |
US20170218470A1 (en) * | 2014-08-08 | 2017-08-03 | Primetals Technologies Austria GmbH | Burner-lance unit |
US10508315B2 (en) | 2014-08-08 | 2019-12-17 | Primetals Technologies Austria GmbH | Burner-lance unit |
Also Published As
Publication number | Publication date |
---|---|
CN1214120C (zh) | 2005-08-10 |
EP1080236B1 (de) | 2002-06-12 |
CN1305536A (zh) | 2001-07-25 |
DE59901746D1 (de) | 2002-07-18 |
US6368550B1 (en) | 2002-04-09 |
RU2211248C2 (ru) | 2003-08-27 |
ES2180305T3 (es) | 2003-02-01 |
BR9909769A (pt) | 2001-01-30 |
DE19817590C1 (de) | 1999-03-18 |
ATE219156T1 (de) | 2002-06-15 |
EP1080236A1 (de) | 2001-03-07 |
KR20010071159A (ko) | 2001-07-28 |
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