EP0947587A1 - Lance pour injection de gaz et procédé pour son refroidissement - Google Patents

Lance pour injection de gaz et procédé pour son refroidissement Download PDF

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Publication number
EP0947587A1
EP0947587A1 EP98104153A EP98104153A EP0947587A1 EP 0947587 A1 EP0947587 A1 EP 0947587A1 EP 98104153 A EP98104153 A EP 98104153A EP 98104153 A EP98104153 A EP 98104153A EP 0947587 A1 EP0947587 A1 EP 0947587A1
Authority
EP
European Patent Office
Prior art keywords
lance
melt
gas
cooling
mixing chamber
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Withdrawn
Application number
EP98104153A
Other languages
German (de)
English (en)
Inventor
Volkwin Köster
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Techint Compagnia Tecnica Internazionale SpA
Original Assignee
Volkwin Köster
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Volkwin Köster filed Critical Volkwin Köster
Priority to EP98104153A priority Critical patent/EP0947587A1/fr
Priority to DE59900496T priority patent/DE59900496D1/de
Priority to AU27268/99A priority patent/AU2726899A/en
Priority to PT99907572T priority patent/PT1062370E/pt
Priority to CNB998038229A priority patent/CN1264995C/zh
Priority to RU2000123357/02A priority patent/RU2221054C2/ru
Priority to JP2000535778A priority patent/JP4430230B2/ja
Priority to AT99907572T priority patent/ATE210195T1/de
Priority to CA002321651A priority patent/CA2321651C/fr
Priority to KR1020007009862A priority patent/KR100633188B1/ko
Priority to PCT/EP1999/001255 priority patent/WO1999046412A1/fr
Priority to ES99907572T priority patent/ES2169599T3/es
Priority to BR9908644-1A priority patent/BR9908644A/pt
Priority to US09/623,005 priority patent/US6562287B1/en
Priority to EP99907572A priority patent/EP1062370B1/fr
Publication of EP0947587A1 publication Critical patent/EP0947587A1/fr
Withdrawn legal-status Critical Current

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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
    • F27D9/00—Cooling of furnaces or of charges therein
    • 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
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
    • C22B9/103—Methods of introduction of solid or liquid refining or fluxing agents
    • 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
    • C21C2005/4626—Means for cooling, e.g. by gases, fluids or liquids

Definitions

  • the invention relates to a method for cooling a Introducing a medium into a melt and / or for measuring lance provided by properties of the melt as well as a lance suitable for performing this procedure.
  • Lances for blowing media in the interior of metallurgical vessels such as Furnaces or converters and as a support for instruments for Measuring properties of the melt are known. you will be For example, to oxygenate a pig iron melt, for Blowing in media during steel treatment (e.g. coal for Foaming of the slag) and for measuring the temperature of the melt used.
  • the invention has for its object a method and to create a lance of the type mentioned in the introduction, the or that enable effective and safe lance cooling.
  • the method according to the invention is characterized in that that in a closed towards the melt-side lance end Cooling circuit a gas / liquid mixture as a cooling medium to be led.
  • the melt-side lance end denotes that end of the Lance that faces the melt during operation or, if applicable, in this dips. It is the thermally highly stressed Lance end.
  • the cooling circuit is for the melt side Lance end closed. There is none in this area Coolant leakage takes place, the coolant is in instead returned to a region of the lance spaced from the melt and exits the lance there.
  • the coolant circuit overall can either be completely closed but you can also use an open cooling circuit which is spaced from the melt-side end the heated cooling medium emerging from the lance is not reused becomes.
  • the gas content of the mixture used according to the invention is preferably air or an inert gas (for example nitrogen or argon), the liquid portion prefers water.
  • the method according to the invention requires considerably for cooling smaller amounts of liquid than that known in the prior art Water cooling.
  • the gas / liquid flow is preferably set so that the liquid content in the area of thermally particularly stressed melt-side lance end largely or completely evaporated. This has two advantages. On the one hand, you don't just use the heat capacity for cooling liquid (water), but also the essential greater heat of vaporization for the phase transition Liquid vapor and maintains even at relatively low Liquid flows have a high cooling capacity.
  • the liquid portion of the invention used cooling medium water. If you choose operating conditions, where the water content in the area of the melt side Part of the lance is largely or completely evaporated the cooling circuit is preferably fed with deionized water, for limescale deposits in the corresponding area of the Avoid cold room. Demineralized water is not available Available and the cooling circuit must be fed with ordinary tap or raw water Gas / liquid flow preferably so that at most a low proportion of water in the area of the melt side Lance end evaporates. Unwanted limescale deposits will be so largely avoided.
  • the gas / liquid mixture can be produced outside the lance and are already supplied as a mixture to the lance.
  • the lance has a mixing chamber connected to the cooling circuit, has the connections for a gas and liquid supply and designed to produce a gas / liquid mixture is.
  • the mixing chamber is preferably spaced from the melt side Lance end arranged. It is preferred in the part of the protruding from the furnace or converter Lance.
  • the gas / liquid mixture is preferred by the mixing chamber with a pressure of 2 to 6 bar, more preferably about 4 bar, through a pressure line to the melt-side lance end led out.
  • a two-component nozzle arranged, from which the mixture in one In the area of the lance tip, the cooling chamber is relaxed.
  • That relaxed and warmed Mixture is through a second line from the melt side Lance end led away and occurs preferentially at one connection from the lance arranged outside the converter out again.
  • the pressure of the mixture after exiting the or the two-component nozzles is preferably slightly above atmospheric pressure.
  • the lance is used in diving operation it should be greater than the back pressure of the lance tip surrounding liquid melt. It comes because of from malfunctions to melting of the lance tip and melt breakthrough into the cold room the overpressure prevailing in it the further penetration of Melt or possibly slag.
  • the mixing chamber advantageously has two concentric, the lance tube surrounding ring chambers in their radial partition connecting holes or openings are arranged.
  • lance tube means that for the introduction of gas and / or solid into the melt provided inner tube of the entire lance assembly.
  • the inner one The annular chamber can, for example, with water from its end face are applied, the outer annular chamber becomes circumferential pressurized with compressed air. Through the holes in the radial partition, compressed air is mixed into the water. The resulting mixture is on the melt side end removed and removed from the mixing chamber.
  • the pressure line for connecting the mixing chambers and the two-fluid nozzle the lance tube is preferably concentric surrounding ring line.
  • the return of the relaxed mixture preferably takes place from the melt-side lance end also through a ring line, which as a the pressure line concentrically surrounding second ring line is formed can be.
  • a preferred field of application of the invention is treatment of or performing measurements on metallurgical Melting, e.g. pig iron or steel melting.
  • metallurgical Melting e.g. pig iron or steel melting.
  • the invention is not for use in molten metals limited, but can be used for further melt flows high temperature (e.g. glass melting) can be used.
  • the lance according to the invention has an inner lance tube 1 on, through the solids and / or gases supplied to the melt become. These media escape into the melt at the melt end of the lance 2.
  • the lance tube 1 is surrounded by a cooling device described in more detail below.
  • connection piece 3 cooling water is the lance tube 1 surrounding annular chamber 4 supplied.
  • the inner annular chamber 5 is from an outer one Annular chamber 6 surrounded by a connector 7 with Compressed air is fed. Form the two annular chambers 5,6 together the mixing chamber.
  • the radial partition 8 between the annular chambers 5 and 6 have connection holes indicated at 9 on. Compressed air and water mix together, the mixture is drawn axially into the interior Annular chamber 5 connecting ring line (pressure line) 10 to Lance end on the melt side.
  • the pressure of the mixture in the pressure line 10 is approximately 4 bar.
  • the ring line 10 is in the region of the melt-side end 2 of the lance to six evenly over the lance circumference distributed two-component nozzles 11 formed.
  • the water / air mixture relaxes when exiting the two-component nozzles into the annular cooling space 12.
  • the water is through this relaxation process torn into very fine droplets.
  • the high surface of the water supplied favors one rapid heat absorption and thus a high cooling capacity.
  • the Forming the ring line 10 to six two-component nozzles 11 allowed the operation of the lance with tap or process water as part of the cooling medium.
  • the clear width of the two-substance nozzles 11 enables the passage of, if necessary, in the process water contained impurities or particles.
  • the lance should only be operated with deionized water can, the ring line 10 in the area of the cooling chamber the cooling chamber 12 to an annular gap with a clear Width of about 0.5 mm can be narrowed, making the lance tube 1 rotationally symmetrical surrounds.
  • This annular gap forms a single one Dual-substance nozzle.
  • the formation of several discrete two-component nozzles 11 is not required in this case.
  • the mixture emerging from the two-substance nozzles 11 hits on opposite (melt-side) end of the cooling chamber 12 on a curved cooling surface 13 through which it is in its Direction of movement deflected and the second ring line 14 trained coolant discharge line is supplied.
  • the water content of the supplied mixture evaporates in the Cooling chamber 12 preferably completely. It comes with special Operating conditions at exceptionally high temperatures in the cooling chamber 12, the cooling effect may supported are caused by the strongly endothermic decay of part of the Water in molecular hydrogen and oxygen.
  • the cooling chamber 12 to Melt opens out due to the use of the fine Aerosols as a cooling medium practically no danger that yet liquid water is enclosed by the melt and then evaporated explosively.
  • the cold room 12 preferably set an overpressure sufficient to Diving operation of the lance possibly into the cooling chamber 12 to push back through molten metal or slag and prevent further intrusion.
  • the cooling medium flowing back through the ring line 14 becomes via an annular chamber 15 and a connecting piece 16 from the Lance removed. It can either be rejected (more open Cooling circuit) or returned to the cooling circuit again become.
  • the annular chamber 15 has a second connection 17 which with a safety pressure relief valve, not shown in the drawing connected is.
  • the lance can also be used to introduce media into the melt also used to measure properties of the melt become.
  • the melt side End 2 measuring instruments not shown in the drawing to be ordered.
  • a radiation pyrometer can For example, the temperature of the melt can be measured.
  • a Steel melt can, for example, by means of laser-induced emission spectroscopy a multi-element analysis can be carried out. In this way, for example, a steel finishing process can be measured be followed and ended at the desired stage.
  • the lance with the attached measuring instrument in the area of the surface of the steel bath.
  • Blown compressed air or an inert gas such as nitrogen Blown compressed air or an inert gas such as nitrogen, which on the one hand keeps the lance opening free and on the other hand removes slag from the steel bath surface.
  • the lance according to the invention is through an opening in the wall or cover inserted into the converter or furnace.
  • the connections for supply and discharge of the cooling media and the mixing chamber are preferably located outside of the converter in a correspondingly cooler area.

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)
  • Manufacture And Refinement Of Metals (AREA)
  • Nozzles (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Manufacturing And Processing Devices For Dough (AREA)
  • Noodles (AREA)
  • Air Bags (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
EP98104153A 1998-03-09 1998-03-09 Lance pour injection de gaz et procédé pour son refroidissement Withdrawn EP0947587A1 (fr)

Priority Applications (15)

Application Number Priority Date Filing Date Title
EP98104153A EP0947587A1 (fr) 1998-03-09 1998-03-09 Lance pour injection de gaz et procédé pour son refroidissement
DE59900496T DE59900496D1 (de) 1998-03-09 1999-02-26 Blaslanze mit gas/flüssigkeit-mischkammer und verfahren zu deren expansionskühlung
AU27268/99A AU2726899A (en) 1998-03-09 1999-02-26 Blasting lance with a gas/liquid mixing chamber and a method for the expansion cooling thereof
PT99907572T PT1062370E (pt) 1998-03-09 1999-02-26 Lanca para insuflar com compartimento de mistura de gas/liquido e processo de arrefecimento por expansao
CNB998038229A CN1264995C (zh) 1998-03-09 1999-02-26 有气体/液体混合室的喷枪及其膨胀冷却的方法
RU2000123357/02A RU2221054C2 (ru) 1998-03-09 1999-02-26 Вдувная фурма с камерой для смешивания газа и жидкости (вариант) и способ расширительного охлаждения фурмы
JP2000535778A JP4430230B2 (ja) 1998-03-09 1999-02-26 媒体を融成物に導入するため及び／又は融成物の特性を測定するためのランスを冷却する方法、及びこの方法を実施するためのランス
AT99907572T ATE210195T1 (de) 1998-03-09 1999-02-26 Blaslanze mit gas/flüssigkeit-mischkammer und verfahren zu deren expansionskühlung
CA002321651A CA2321651C (fr) 1998-03-09 1999-02-26 Lance de soufflage a chambre de melange gaz-liquide et son procede de refroidissement par dilatation
KR1020007009862A KR100633188B1 (ko) 1998-03-09 1999-02-26 가스/액체 혼합챔버를 가진 송풍 랜스와 그 팽창-냉각 방법
PCT/EP1999/001255 WO1999046412A1 (fr) 1998-03-09 1999-02-26 Lance de soufflage a chambre de melange gaz-liquide et son procede de refroidissement par dilatation
ES99907572T ES2169599T3 (es) 1998-03-09 1999-02-26 Lanza de soplado con camara de mezcla gas/liquido y procedimiento para su refrigeracion por expansion.
BR9908644-1A BR9908644A (pt) 1998-03-09 1999-02-26 Processo para o resfriamento de uma lança prevista para a introdução de um meio em uma massa fundida e/ou para a medição de propriedades da massa fundida, e, lança para a realização do processo
US09/623,005 US6562287B1 (en) 1998-03-09 1999-02-26 Blasting lance with a gas/liquid mixing chamber and a method for the expansion cooling thereof
EP99907572A EP1062370B1 (fr) 1998-03-09 1999-02-26 Lance de soufflage a chambre de melange gaz-liquide et son procede de refroidissement par dilatation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98104153A EP0947587A1 (fr) 1998-03-09 1998-03-09 Lance pour injection de gaz et procédé pour son refroidissement

Publications (1)

Publication Number Publication Date
EP0947587A1 true EP0947587A1 (fr) 1999-10-06

Family

ID=8231556

Family Applications (2)

Application Number Title Priority Date Filing Date
EP98104153A Withdrawn EP0947587A1 (fr) 1998-03-09 1998-03-09 Lance pour injection de gaz et procédé pour son refroidissement
EP99907572A Expired - Lifetime EP1062370B1 (fr) 1998-03-09 1999-02-26 Lance de soufflage a chambre de melange gaz-liquide et son procede de refroidissement par dilatation

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP99907572A Expired - Lifetime EP1062370B1 (fr) 1998-03-09 1999-02-26 Lance de soufflage a chambre de melange gaz-liquide et son procede de refroidissement par dilatation

Country Status (14)

Country Link
US (1) US6562287B1 (fr)
EP (2) EP0947587A1 (fr)
JP (1) JP4430230B2 (fr)
KR (1) KR100633188B1 (fr)
CN (1) CN1264995C (fr)
AT (1) ATE210195T1 (fr)
AU (1) AU2726899A (fr)
BR (1) BR9908644A (fr)
CA (1) CA2321651C (fr)
DE (1) DE59900496D1 (fr)
ES (1) ES2169599T3 (fr)
PT (1) PT1062370E (fr)
RU (1) RU2221054C2 (fr)
WO (1) WO1999046412A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004046391A1 (fr) * 2002-11-16 2004-06-03 Vai Fuchs Gmbh Procédé et dispositif pour refroidir des lances de soufflage
US7140765B2 (en) * 2001-10-30 2006-11-28 Techint Compagnia Tecnica Internazionale S.P.A. Device and method for discrete and continuous measurement of the temperature of molten metal in a furnace or recepient for its production or treatment
EP3879216A4 (fr) * 2018-10-18 2022-02-23 Jiangsu New Chunxing Resource Recycling Co. Ltd Lance de soufflage latérale pour four de fusion et procédé d'utilisation

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006105578A1 (fr) * 2004-10-18 2006-10-12 Technological Resources Pty Limited Appareil d'injection de matiere particulaire solide dans un recipient
DE102006034007A1 (de) * 2006-07-22 2008-02-07 Messer Group Gmbh Verfahren und Vorrichtung zum Eintragen eines Mediums in einen thermischen Behandlungsraum
WO2014189506A1 (fr) * 2013-05-22 2014-11-27 Johns Manville Brûleurs et fours de combustion immergés, et procédés d'utilisation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3744780A (en) * 1972-01-07 1973-07-10 Applied Techn Corp Method of treating molten material by use of a lance
DE2620509B1 (de) * 1976-05-08 1977-08-25 Didier Werke Ag Feuerfester Bauteil oder Formkoerper
WO1980001000A1 (fr) * 1978-11-07 1980-05-15 K Sharp Refroidissement de surfaces adjacentes a du metal en fusion
WO1992007965A1 (fr) * 1990-10-31 1992-05-14 Minproc Technology, Inc Lance metallurgique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI64398C (fi) 1980-08-04 1983-11-10 Outokumpu Oy Gasblaosroer foer inmatning av reaktionsaemnen i metallurgiskasmaeltor
AT389710B (de) 1988-04-25 1990-01-25 Voest Alpine Ind Anlagen Blaslanze

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3744780A (en) * 1972-01-07 1973-07-10 Applied Techn Corp Method of treating molten material by use of a lance
DE2620509B1 (de) * 1976-05-08 1977-08-25 Didier Werke Ag Feuerfester Bauteil oder Formkoerper
WO1980001000A1 (fr) * 1978-11-07 1980-05-15 K Sharp Refroidissement de surfaces adjacentes a du metal en fusion
WO1992007965A1 (fr) * 1990-10-31 1992-05-14 Minproc Technology, Inc Lance metallurgique

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7140765B2 (en) * 2001-10-30 2006-11-28 Techint Compagnia Tecnica Internazionale S.P.A. Device and method for discrete and continuous measurement of the temperature of molten metal in a furnace or recepient for its production or treatment
WO2004046391A1 (fr) * 2002-11-16 2004-06-03 Vai Fuchs Gmbh Procédé et dispositif pour refroidir des lances de soufflage
CN1320131C (zh) * 2002-11-16 2007-06-06 韦富克斯有限公司 用于冷却吹风喷枪的方法和装置
KR101024824B1 (ko) * 2002-11-16 2011-03-31 지멘스 브이에이아이 메탈스 테크놀로지스 게엠베하 취입 랜스 냉각 방법 및 장치
EP3879216A4 (fr) * 2018-10-18 2022-02-23 Jiangsu New Chunxing Resource Recycling Co. Ltd Lance de soufflage latérale pour four de fusion et procédé d'utilisation

Also Published As

Publication number Publication date
BR9908644A (pt) 2000-11-14
DE59900496D1 (de) 2002-01-17
KR20010041658A (ko) 2001-05-25
KR100633188B1 (ko) 2006-10-11
PT1062370E (pt) 2002-05-31
CA2321651C (fr) 2007-05-08
JP4430230B2 (ja) 2010-03-10
ATE210195T1 (de) 2001-12-15
JP2002506124A (ja) 2002-02-26
US6562287B1 (en) 2003-05-13
CN1264995C (zh) 2006-07-19
RU2221054C2 (ru) 2004-01-10
WO1999046412A1 (fr) 1999-09-16
CN1292831A (zh) 2001-04-25
CA2321651A1 (fr) 1999-09-16
ES2169599T3 (es) 2002-07-01
EP1062370A1 (fr) 2000-12-27
EP1062370B1 (fr) 2001-12-05
AU2726899A (en) 1999-09-27

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