EP0340207B1 - Blaslanze - Google Patents

Blaslanze Download PDF

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Publication number
EP0340207B1
EP0340207B1 EP89890114A EP89890114A EP0340207B1 EP 0340207 B1 EP0340207 B1 EP 0340207B1 EP 89890114 A EP89890114 A EP 89890114A EP 89890114 A EP89890114 A EP 89890114A EP 0340207 B1 EP0340207 B1 EP 0340207B1
Authority
EP
European Patent Office
Prior art keywords
channel
coolant
flow
lance
section
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
Application number
EP89890114A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0340207A1 (de
Inventor
Manfred Eysn
Ernest Dr. Dipl.-Ing. Fuhrmann
Hans Dipl.-Ing. Grabner
Ernst Höllwarth
Hellmuth Smejkal
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.)
Primetals Technologies Austria GmbH
Original Assignee
Voest Alpine Industrienlagenbau GmbH
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 Voest Alpine Industrienlagenbau GmbH filed Critical Voest Alpine Industrienlagenbau GmbH
Publication of EP0340207A1 publication Critical patent/EP0340207A1/de
Application granted granted Critical
Publication of EP0340207B1 publication Critical patent/EP0340207B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/072—Treatment with gases
    • 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
    • C21C5/4606—Lances or injectors
    • C21C2005/4626—Means for cooling, e.g. by gases, fluids or liquids

Definitions

  • the invention relates to a blowing lance for the treatment of metallurgical melts, with a lance head, in which a plurality of expansion nozzles are provided which are directed towards a bath surface of the melt and penetrate an end plate of the lance head and which emanate from at least one lance channel, the at least one lance channel from an inflow channel.
  • a return channel for a cooling medium is peripherally surrounded and the inlet and return channels are separated from one another by a flow guide piece arranged above the end plate, which flow guide piece is penetrated by at least one connecting channel for the cooling medium connecting the inlet channel and the return channel, and in addition to that at least one connecting channel, at least one coolant secondary channel is provided, which derives a partial flow of the coolant flowing into the connecting channel and this partial flow via an orifice directed directly against the center of the end plate to the connection channel.
  • a blowing lance of the type mentioned at the outset is known from SU-A-1002366.
  • the partial flow in this blowing lance has essentially the same flow direction as the coolant flow surrounding the partial flow peripherally.
  • a flow guide piece between the inlet and the return channel is provided to improve the cooling, which is designed so that a constant flow cross-section with increasing narrowing between the adjacent expansion nozzles in the horizontal plane by proportional increase in the flow cross-section in vertical plane is given. This is to ensure a uniformly high flow rate of the coolant on the end plate.
  • the invention aims to avoid these disadvantages and difficulties and has the task of creating a blowing lance, in which sufficient cooling of the central region of the forehead plate is ensured so that the forehead plate no longer represents a weak point and increases the life of the blowing lance significantly is.
  • blowing lance are the subject of dependent claims 2 to 5.
  • a particularly preferred embodiment is characterized in that the coolant secondary channel or channels is radially asymmetrical to the center of the Cross-section of the lance head is (are).
  • the asymmetrical supply of a partial coolant flow causes an even more intensive swirling of the flow prevailing on the end plate, so that areas with a significantly reduced coolant flow rate, as occur in known symmetrical flow conditions, are avoided.
  • An embodiment that is easy to manufacture is characterized in that the at least one coolant secondary channel is arranged within the connecting channel.
  • a particularly strong flow can be achieved in the central region of the end plate in that the at least one secondary coolant channel has a closed cross section and an inner cross section that decreases in size from its beginning to its end.
  • a structurally simple embodiment is characterized in that the at least one coolant secondary channel has a cross section open on one side.
  • FIG. 1 showing a longitudinal section through a blowing lance according to a first embodiment.
  • FIG. 2 is a section along the line II-II of FIG. 1.
  • FIGS. 3 and 4 further embodiments are shown in a representation analogous to FIG. 1.
  • a blowing lance 1 for inflating oxygen on a surface of e.g. melt located in a converter has a water-cooled outer jacket 2, which is formed by three concentrically arranged tubes 3, 4, 5.
  • a central lance channel 6 is formed through the inner tube 3, through which oxygen is supplied to the lance head 7.
  • the lance channel 6 is closed at its lower end by a base part 8. Gas passage openings 9, whose axes 10 are arranged to diverge from one another, lead through this base part 8 to the outside and, as will be explained below, are passed through the end plate 11 delimiting the lance head 7 on the melt side.
  • the end plate 11 is welded to the outer casing tube 5 and has inwardly directed pipe sockets 12 which connect to the gas passage openings 9 of the base part 8 in alignment.
  • a flow guide piece 15 is welded between the bottom part 8 and the end plate 11, which has a central passage 16 and with this together with the bottom part 8 and the end plate 11 one of the inlet 17 and the return channel 18, the formed by the tubes 3, 4 or by the tubes 4, 5, forms connecting connecting channel 19.
  • the cooling medium is fed through the inlet channel 17 to the connecting channel 19, in which it is deflected through the central passage 16 against the end plate 11. Then it flows along the end plate 11 radially outwards in the direction of the return channel 18.
  • the pipe sockets 12 of the end plate 11 project through the flow guide piece 15 with lateral play, so that cooling of these pipe sockets 12 is also ensured.
  • the central tube 3 is formed by two tube parts 3 'and 3', the lower, welded to the bottom part 8 tube part 3 'protrudes into the upwardly projecting tube part 3' and seals 22 are provided between these tube parts.
  • coolant secondary channels 23 are provided, each of which is formed by a tube 24 which is closed on all sides.
  • Each coolant secondary channel 23 starts from the inlet channel 17 and serves to branch off a partial flow of the incoming coolant.
  • Each partial flow is with the help of the coolant secondary channels 23 in one of the Direction of flow in the connecting channel 19 deviates from the direction of flow.
  • the mouth 25 of each coolant secondary channel 23 is directed directly against the center 26 of the end plate 11, which forms a protrusion in the interior of the blowing lance.
  • the flow axis 27 of the outlet cross section of the mouth 25 of each coolant secondary channel 23 is at an angle to the flow axis 28 of the flow prevailing in the connecting channel 19 at the mouth 25 of the coolant secondary channel 23.
  • the coolant secondary channels 23 have the effect that the radially symmetrical flow prevailing in the connecting channel 19 without coolant secondary channels 23 is swirled and a radially asymmetrical flow is created which ensures a coolant flow at a sufficiently high speed in the center of the end plate and the center 26 of the end plate 11 which is particularly endangered is sufficient cools.
  • a coolant secondary channel 23 is formed by a channel 29 which is U-shaped in cross section and extends in a straight line, the mouth of which is also directed against the center 26 of the end plate 11.
  • the embodiment shown in FIG. 4 has a coolant secondary channel 23 which, like the coolant secondary channel 23 shown in FIG. 1, is formed from a tube piece 30 which is closed on all sides.
  • This piece of pipe like the variant shown in Fig. 1, has a shape from its beginning to its end, i.e. in the direction of flow, reducing internal cross-section, whereby a flow which is particularly effective with regard to its flow velocity is directed against the center 26 of the end plate 11.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Nozzles (AREA)
  • Heat Treatment Of Articles (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
EP89890114A 1988-04-25 1989-04-20 Blaslanze Expired - Lifetime EP0340207B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0104488A AT389710B (de) 1988-04-25 1988-04-25 Blaslanze
AT1044/88 1988-04-25

Publications (2)

Publication Number Publication Date
EP0340207A1 EP0340207A1 (de) 1989-11-02
EP0340207B1 true EP0340207B1 (de) 1992-05-20

Family

ID=3505366

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89890114A Expired - Lifetime EP0340207B1 (de) 1988-04-25 1989-04-20 Blaslanze

Country Status (11)

Country Link
US (1) US4951928A (ru)
EP (1) EP0340207B1 (ru)
JP (1) JPH01312023A (ru)
KR (1) KR970003638B1 (ru)
CN (1) CN1012738B (ru)
AT (1) AT389710B (ru)
CA (1) CA1306607C (ru)
DE (1) DE58901450D1 (ru)
ES (1) ES2033142T3 (ru)
GR (1) GR3005171T3 (ru)
RU (1) RU1813101C (ru)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996015278A1 (en) * 1994-11-15 1996-05-23 A.H. Tallman Bronze Company Limited Liquid cooled nozzle for a basic oxygen furnace lance
BE1009743A3 (fr) * 1995-06-23 1997-07-01 Thomas Jacques Tuyere de soufflage a oxygene siderurgique.
EP0947587A1 (de) * 1998-03-09 1999-10-06 Volkwin Köster Blaslanze und Verfahren zu deren Kühlung
US6217824B1 (en) 1999-05-20 2001-04-17 Berry Metal Company Combined forged and cast lance tip assembly
AUPQ535500A0 (en) * 2000-01-31 2000-02-17 Technological Resources Pty Limited Apparatus for injecting gas into a vessel
BE1013686A3 (fr) * 2000-09-15 2002-06-04 Thomas Jacques Nez de lance de soufflage.
AUPR624801A0 (en) * 2001-07-10 2001-08-02 Technological Resources Pty Limited A gas injection lance
DE102006010287A1 (de) * 2006-03-02 2007-09-13 Saar-Metallwerke Gmbh Sauerstofflanzenkopf
WO2007123986A2 (en) * 2006-04-21 2007-11-01 Berry Metal Company Metal making lance tip assembly
EP1908526A1 (fr) * 2006-10-04 2008-04-09 Siemens S.A.S. Dispositif d'éjection d'un mélange diphasique
EP1932927B1 (en) * 2006-12-15 2012-08-01 Technological Resources Pty. Ltd. Apparatus for injecting gas into a vessel
KR101159663B1 (ko) * 2010-03-30 2012-06-25 현대제철 주식회사 전기로용 노즐장치
CN101993968B (zh) * 2010-12-09 2012-07-18 中冶南方工程技术有限公司 转炉钢水温度控制方法
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
BE1023685B1 (fr) * 2016-05-25 2017-06-14 Soudobeam Sa Nez de lance de soufflage
RU167353U1 (ru) * 2016-05-23 2017-01-10 федеральное государственное бюджетное образовательное учреждение высшего образования "Санкт-Петербургский горный университет" Фурма для продувки расплава
USD822987S1 (en) 2017-02-24 2018-07-17 Yeti Coolers, Llc Bag
CN115989325A (zh) * 2020-09-08 2023-04-18 西门子股份公司 拉伐尔喷嘴及其制造方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7337989U (de) * 1974-01-17 Thyssen Huette A Ag Blaslanze mit gekühltem Düsenkopf für das Sauerstoffaufblasverfahren
US3743814A (en) * 1970-12-18 1973-07-03 G Oakes Oxygen lance
DE2712745C2 (de) * 1977-03-23 1979-03-15 Stahlwerke Peine-Salzgitter Ag, 3150 Peine Lanzenkopf für Frischlanze
US4301969A (en) * 1980-02-25 1981-11-24 Sharp Kenneth C Oxygen lance nozzle
SU1002366A1 (ru) * 1981-12-30 1983-03-07 Московский Ордена Октябрьской Революции И Ордена Трудового Красного Знамени Институт Стали И Сплавов Фурма дл продувки металла

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED Woche 84, Nr. M24, 010357/02, 22. Februar 1984, Derwent Publications Ltd., London, GB; & SU-A-1002366 (ZHDANOV AZOVSTAL) 07.03.1983 *
SOVIET INVENTIONS ILLUSTRATED Woche 8617, Nr. M24, 112140/17, 9. Mai 1986, Derwent Publications Ltd., London GB; & SU-A-1183547 (DNEPR METALLURGY) 07.10.85 *

Also Published As

Publication number Publication date
AT389710B (de) 1990-01-25
RU1813101C (ru) 1993-04-30
GR3005171T3 (ru) 1993-05-24
CA1306607C (en) 1992-08-25
CN1037545A (zh) 1989-11-29
JPH01312023A (ja) 1989-12-15
DE58901450D1 (de) 1992-06-25
KR890016188A (ko) 1989-11-28
ATA104488A (de) 1989-06-15
CN1012738B (zh) 1991-06-05
US4951928A (en) 1990-08-28
KR970003638B1 (ko) 1997-03-20
ES2033142T3 (es) 1993-03-01
EP0340207A1 (de) 1989-11-02

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