WO2011085843A1 - Partially gas-cooled oxygen blowing lance - Google Patents

Partially gas-cooled oxygen blowing lance Download PDF

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Publication number
WO2011085843A1
WO2011085843A1 PCT/EP2010/067636 EP2010067636W WO2011085843A1 WO 2011085843 A1 WO2011085843 A1 WO 2011085843A1 EP 2010067636 W EP2010067636 W EP 2010067636W WO 2011085843 A1 WO2011085843 A1 WO 2011085843A1
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WO
WIPO (PCT)
Prior art keywords
cooling
oxygen blowing
blowing lance
lance
oxygen
Prior art date
Application number
PCT/EP2010/067636
Other languages
German (de)
French (fr)
Inventor
Alexander Fleischanderl
Andreas Hackl
Helmut Kerschbaum
Stefan Lechner
Marinko Lekic-Ninic
Harald Traxinger
Original Assignee
Siemens Vai Metals Technologies 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 Siemens Vai Metals Technologies Gmbh filed Critical Siemens Vai Metals Technologies Gmbh
Publication of WO2011085843A1 publication Critical patent/WO2011085843A1/en

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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
    • 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
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/22—Arrangements of air or gas supply devices
    • 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
    • C21C2005/4626—Means for cooling, e.g. by gases, fluids or liquids

Definitions

  • the present invention relates to a partially gas-cooled oxygen blowing lance.
  • Sauerstoffblaslanzen usually a cooling jacket with water cooling on. It will
  • the disadvantage here is that the weight of the oxygen blowing lance is considerably increased in use by the water cooling, which makes correspondingly dimensioned carrying devices necessary and makes the oxygen lance overall lumbering.
  • On a water - cooled lance due to the intensive cooling of the outer skin of the oxygen blowing lance, there are also excrements from freezing slag splashes and steel splashes, which cause the
  • Cooling water entering the molten steel Cooling water entering the molten steel.
  • DE10253463 presents a completely gas-cooled lance. A completely gas-cooled
  • Oxygen blowing lance is consuming in terms of their production.
  • Oxygen conduit which at least along its longitudinal extent of a
  • Cooling jacket is surrounded, wherein the cooling jacket has at least one coolant channel for cooling water, which is connected to a supply line and a discharge for cooling water, characterized in that the cooling jacket additionally at least one connected to a supply line for cooling gasdegaskana! having.
  • the longitudinal extent is to be understood as the extension from the lance head end of the oxygen blowing lance to the point of introduction of oxygen into the oxygen line of the oxygen blowing lance.
  • oxygen blowing lance is partially water and partially gas cooled.
  • the cooling jacket surrounds the oxygen line at least along the longitudinal extent of the oxygen blowing lance, but it can also extend over part of the cross section of the oxygen line.
  • the cooling jacket can run along the entire
  • Cooling lance Longitudinal extent of the oxygen blowing lance extend over only a part of the longitudinal extent of the oxygen blowing lance.
  • the cooling jacket is present in a lance-head-side region of the oxygen blowing lance that encompasses the lance head, since this region is particularly exposed to heat and wear and therefore absolutely requires cooling.
  • the cooling is provided by both cooling water and cooling gas. Since cooling gas takes over part of the cooling, the cooling to be provided by cooling water is lower than in water-cooled oxygen blowing lances alone. Accordingly, the cooling water cooled surface of the oxygen blowing lance may be lower, which reduces the risk of leakage of cooling water.
  • An increase in the cooling gas cooled surface of the oxygen blowing lance is at the expense of cooled by cooling water surface of Sauerstoffblasianze and therefore contributes to increasing safety in operation.
  • the cooling jacket is in a lance head comprehensive lancet-side region of the oxygen blowing of the at least one
  • Coolant gas channel formed Since this area is particularly exposed to heat and wear, the likelihood of leakage in this area is greatest.
  • the use of the cooling medium cooling gas instead of cooling water in this area accordingly increases the safety margin during operation of the oxygen blowing agent.
  • the lance-head-side region of the oxygen blowing unit in which the cooling jacket is formed by the at least one cooling gas channel, preferably extends from the lance-head-side end of the oxygen blowing unit over at least 0.25% to up to 90% of the longitudinal extent of the oxygen blowing agent.
  • Coolant channels for cooling water is formed, is correspondingly lower.
  • an area greater than 0.25% of the longitudinal extent is gas-cooled, for example up to 0.5%, up to 1%, up to 2%, up to 4%, up to 8%, up to 10%, up to 20%, up to 30%, up to 40%, up to 50%, up to 60%, up to 70%, up to 80% or up to 90% of the longitudinal extent.
  • gas-cooled area the easier the oxygen blowing lance according to the invention becomes compared to a water-cooled one
  • the upper limit values are included. As the proportion of the longitudinal extent of the oxygen blowing lance increases, the end of the gas-cooled section facing the introduction of oxygen into the oxygen line moves ever further towards the introduction of oxygen into the oxygen line of the oxygen blowing lance.
  • the cooling jacket is formed by the coolant channel (s) for cooling water.
  • cooling gas for example, compressed air, nitrogen or oxygen is used, for cost reasons preferably compressed air.
  • the at least one cooling gas channel connected to a feed line for cooling gas can be open or closed on the lance head side. He may also have a derivative for cooling gas. If it is open, the cooling gas can escape from the oxygen lance. When it is closed, the cooling gas can be discharged through the discharge from the oxygen blowing lance.
  • FIG. 1 shows an embodiment with a lance head closed cooling gas channel of an oxygen blowing lance according to the invention with a discharge for cooling gas in a longitudinal section
  • FIG. 1 shows an embodiment with lance head side open Kühigaskanal a Sauerstoffblaslanze invention in a longitudinal section.
  • the cooling jacket 1 in the lance-head-side region of the oxygen blowing lance 2 has a cooling gas channel 4 connected to a feed line for cooling gas 3.
  • Coolant gas channel 4 is closed on the lance head and has a discharge for cooling gas 5.
  • the cooling gas is represented by straight arrows.
  • the cooling jacket 1 surrounds the oxygen line 6 along its longitudinal extent.
  • the oxygen conducted in the oxygen line 6 is represented by jagged arrows.
  • the cooling jacket 1 has adestoffkanai for cooling water 7, which is connected to a supply line 8 and a discharge 9 for cooling water.
  • the cooling water is represented by arrows with double-dashed shaft.
  • the representation of the cooling jacket is schematic and simplified, of course, for example, the cooling water is not in hydraulic
  • FIG. 2 the same reference numerals as in FIG. 1 are used for corresponding parts.
  • the cooling gas channel 4 lance head side open.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

The invention relates to a partially gas-cooled oxygen blowing lance (2), the oxygen blowing lance (2) having at least one oxygen line (6) which, at least along the longitudinal extent thereof, is surrounded by a cooling jacket (1), the cooling jacket (1) having at least one coolant duct for cooling water (7), which duct is connected to a feed line (8) and a drain line (9) for cooling water. According to the invention, the cooling jacket (1) additionally has at least one cooling gas duct (4) connected to a feed line for cooling gas (3).

Description

Teilweise gasgekühlte Sauerstoffblaslanze  Partially gas-cooled oxygen blowing lance
Die vorliegende Erfindung betrifft eine teilweise gasgekühlte Sauerstoffblaslanze. Um den Verschleiß von Sauerstoffblaslanzen zur Stahlherstellung unter den bei ihrem Einsatz herrschenden Temperaturbedingungen gering zu halten, weisen The present invention relates to a partially gas-cooled oxygen blowing lance. In order to keep the wear of Sauerstoffblaslanzen for steel production under the prevailing temperature conditions in their use low, have
Sauerstoffblaslanzen meist einen Kühlmantel mit Wasserkühlung auf. Dabei wird Sauerstoffblaslanzen usually a cooling jacket with water cooling on. It will
Kühlwasser in an der Außenseite der Sauerstoffblaslanze angeordnete Kühlwasserkanäle des Kühlmantels eingeleitet und nach dem Durchlaufen der Kühlwasserkanäle aus ihnen ausgeleitet, um Wärme von der Sauerstoffblaslanze abzuführen. Nachteilig ist dabei, dass das Gewicht der Sauerstoffblaslanze im Einsatz durch die Wasserkühlung beträchtlich erhöht wird, was entsprechend dimensionierte Tragevorrichtungen notwendig und die Sauerstofflanze insgesamt schwerfälliger macht. Auch treten auf einer wassergekühlten Lanze aufgrund der intensiven Kühlung der Außenhaut der Sauerstoffblaslanze zudem Verbärungen aus frierenden Schlackespritzern und Stahlspritzern auf, die die Cooling water introduced into arranged on the outside of the oxygen blowing lance cooling water channels of the cooling jacket and discharged after passing through the cooling water channels from them to dissipate heat from the oxygen blowing lance. The disadvantage here is that the weight of the oxygen blowing lance is considerably increased in use by the water cooling, which makes correspondingly dimensioned carrying devices necessary and makes the oxygen lance overall lumbering. Moreover, on a water - cooled lance, due to the intensive cooling of the outer skin of the oxygen blowing lance, there are also excrements from freezing slag splashes and steel splashes, which cause the
Handhabung der Sauerstoffblaslanze durch die damit verbundene Änderung der Handling of the oxygen blowing lance by the associated change in the
Abmessungen und des Gewichtes der Sauerstoffblaslanze erschweren. Zudem besteht die Gefahr von Leckagen des Kühlmantels und damit verbundenem gefährlichen Dimensions and the weight of the oxygen blowing lance complicate. In addition, there is the risk of leakage of the cooling jacket and associated dangerous
Kühlwassereintritt in die Stahlschmelze. Cooling water entering the molten steel.
Es ist bekannt, die Wasserkühlung durch andere Kühlmedien zu ersetzen. DE10253463 stellt eine vollständig gasgekühlte Blaslanze vor. Eine vollständig gasgekühlte It is known to replace the water cooling by other cooling media. DE10253463 presents a completely gas-cooled lance. A completely gas-cooled
Sauerstoffblaslanze ist hinsichtlich ihrer Fertigung aufwändig. Oxygen blowing lance is consuming in terms of their production.
Es ist die Aufgabe der vorliegenden Erfindung, eine Sauerstoffblaslanze bereitzustellen, mit der eine Behandlung von Stahlschmelzen mit gegenüber vollständig wassergekühlten Sauerstoffbiaslanzen verminderter Gefahr von Leckagen von Kühlwasser vorgenommen werden kann. It is the object of the present invention to provide an oxygen blowing lance, with which a treatment of molten steel with reduced risk of leakage of cooling water compared to completely water-cooled Sauerstoffbiaslanzen can be made.
Diese Aufgabe wird gelöst durch eine Sauerstoffblaslanze mit zumindest einer This object is achieved by an oxygen blowing lance with at least one
Sauerstoffleitung, welche zumindest entlang ihrer Längserstreckung von einem Oxygen conduit, which at least along its longitudinal extent of a
Kühlmantel umgeben ist, wobei der Kühlmantel zumindest einen Kühlmittelkanal für Kühlwasser aufweist, der mit einer Zuleitung und einer Ableitung für Kühlwasser verbunden ist, dadurch gekennzeichnet, dass der Kühlmantel zusätzlich zumindest einen mit einer Zuleitung für Kühlgas verbundenen Kühlgaskana! aufweist. Die Längserstreckung ist dabei als die Erstreckung vom lanzenkopfseitigen Ende der Sauerstoffblaslanze bis zur Stelle der Einleitung von Sauerstoff in die Sauerstoffleitung der Sauerstoffblaslanze zu verstehen. Eine solche Sauerstoffblaslanze ist teilweise wasser- und teilweise gasgekühlt. Der Kühlmantel umgibt die Sauerstoffleitung zumindest entlang der Längserstreckung der Sauerstoffblaslanze, er kann sich aber auch über einen Teil des Querschnitts der Sauerstoffleitung erstrecken. Der Kühlmantel kann sich entlang der gesamten Cooling jacket is surrounded, wherein the cooling jacket has at least one coolant channel for cooling water, which is connected to a supply line and a discharge for cooling water, characterized in that the cooling jacket additionally at least one connected to a supply line for cooling gas Kühlgaskana! having. The longitudinal extent is to be understood as the extension from the lance head end of the oxygen blowing lance to the point of introduction of oxygen into the oxygen line of the oxygen blowing lance. Such oxygen blowing lance is partially water and partially gas cooled. The cooling jacket surrounds the oxygen line at least along the longitudinal extent of the oxygen blowing lance, but it can also extend over part of the cross section of the oxygen line. The cooling jacket can run along the entire
Längserstreckung der Sauerstoffblaslanze erstrecken oder über nur einen Teil der Längserstreckung der Sauerstoffblaslanze. Der Kühlmantel ist jedoch in jedem Fall in einem den Lanzenkopf umfassenden lanzenkopfseitigen Bereich der Sauerstoffblaslanze vorhanden, da dieser Bereich besonders stark Hitze und Verschleiß ausgesetzt ist und daher unbedingt einer Kühlung bedarf. Die Kühlung wird sowohl von Kühlwasser als auch von Kühlgas bereitgestellt. Da Kühlgas einen Teil der Kühlung übernimmt, ist die von Kühlwasser bereitzustellende Kühlung geringer als in allein wassergekühlten Sauerstoffblaslanzen. Entsprechend kann die von Kühlwasser gekühlte Oberfläche der Sauerstoffblaslanze geringer sein, was die Gefahr von Leckagen von Kühlwasser vermindert. Eine Vergrößerung der von Kühlgas gekühlten Oberfläche der Sauerstoffblaslanze geht auf Kosten der von Kühlwasser gekühlten Oberfläche der Sauerstoffblasianze und trägt daher zur Erhöhung der Sicherheit im Betrieb bei. Longitudinal extent of the oxygen blowing lance extend over only a part of the longitudinal extent of the oxygen blowing lance. However, in any case, the cooling jacket is present in a lance-head-side region of the oxygen blowing lance that encompasses the lance head, since this region is particularly exposed to heat and wear and therefore absolutely requires cooling. The cooling is provided by both cooling water and cooling gas. Since cooling gas takes over part of the cooling, the cooling to be provided by cooling water is lower than in water-cooled oxygen blowing lances alone. Accordingly, the cooling water cooled surface of the oxygen blowing lance may be lower, which reduces the risk of leakage of cooling water. An increase in the cooling gas cooled surface of the oxygen blowing lance is at the expense of cooled by cooling water surface of Sauerstoffblasianze and therefore contributes to increasing safety in operation.
Bevorzugterweise wird der Kühlmantel in einem den Lanzenkopf umfassenden lanzenkopfseitigen Bereich der Sauerstoffblasianze von dem zumindest einen Preferably, the cooling jacket is in a lance head comprehensive lancet-side region of the oxygen blowing of the at least one
Kühlgaskanal gebildet. Da dieser Bereich besonders stark Hitze und Verschleiß ausgesetzt ist, ist die Wahrscheinlichkeit einer Leckage in diesem Bereich am größten. Die Verwendung des Kühlmediums Kühlgas statt Kühlwasser in diesem Bereich erhöht entsprechend die Sicherhett beim Betrieb der Sauerstoffblasianze. Coolant gas channel formed. Since this area is particularly exposed to heat and wear, the likelihood of leakage in this area is greatest. The use of the cooling medium cooling gas instead of cooling water in this area accordingly increases the safety margin during operation of the oxygen blowing agent.
Bevorzugterweise erstreckt sich der den Lanzenkopf umfassende lanzenkopfseitige Bereich der Sauerstoffblasianze, in dem der Kühlmantel von dem zumindest einen Kühlgaskanal gebildet wird, vom lanzenkopfseitigen Ende der Sauerstoffblasianze aus über zumindest 0,25% bis zu 90% der Längserstreckung der Sauerstoffblasianze. Je größer der Bereich ist, in dem der Kühlmantel von dem oder den Kühlgaskanälen gebildet wird, desto geringer ist die Gefahr von Leckagen von Kühlwasser, da die exponierte Oberfläche des Teils des Kühlmantels, der von dem oder den The lance-head-side region of the oxygen blowing unit, in which the cooling jacket is formed by the at least one cooling gas channel, preferably extends from the lance-head-side end of the oxygen blowing unit over at least 0.25% to up to 90% of the longitudinal extent of the oxygen blowing agent. The larger the area in which the cooling jacket of the one or more cooling gas channels is formed, the lower the risk of leakage of cooling water, since the exposed surface of the part of the cooling jacket, of the or
Kühlmittelkanälen für Kühlwasser gebildet wird, entsprechend geringer ist. Coolant channels for cooling water is formed, is correspondingly lower.
Bevorzugt ist es, wenn ein Bereich größer 0,25% der Längserstreckung gasgekühlt ist, beispielsweise bis zu 0,5%, bis zu 1 %, bis zu 2%, bis zu 4%, bis zu 8%, bis zu 10%, bis zu 20%, bis zu 30%, bis zu 40%, bis zu 50%, bis zu 60%, bis zu 70%, bis zu 80% oder bis zu 90% der Längserstreckung. Je größer der gasgekühlte Bereich ist, desto leichter wird die erfindungsgemäße Sauerstoffblaslanze im Vergleich zu einer wassergekühlten It is preferred if an area greater than 0.25% of the longitudinal extent is gas-cooled, for example up to 0.5%, up to 1%, up to 2%, up to 4%, up to 8%, up to 10%, up to 20%, up to 30%, up to 40%, up to 50%, up to 60%, up to 70%, up to 80% or up to 90% of the longitudinal extent. The larger the gas-cooled area, the easier the oxygen blowing lance according to the invention becomes compared to a water-cooled one
Sauerstoffblaslanze. Oxygen blowing lance.
Bei den genannten Zahlenwerten für den Bereich sind die oberen Grenzwerte mit umfasst. Mit zunehmendem Anteil an der Längserstreckung der Sauerstoffblaslanze wandert das der Einleitung von Sauerstoff in die Sauerstoffleitung zugewandte Ende des gasgekühlten Abschnittes immer weiter in Richtung Einleitung von Sauerstoff in die Sauerstoffleitung der Sauerstoffblaslanze.  For the stated numerical values for the area, the upper limit values are included. As the proportion of the longitudinal extent of the oxygen blowing lance increases, the end of the gas-cooled section facing the introduction of oxygen into the oxygen line moves ever further towards the introduction of oxygen into the oxygen line of the oxygen blowing lance.
Bei einer Längserstreckung der Sauerstoffblaslanze von beispielsweise 25 m sind also beispielsweise zumindest die letzten 6,25 cm der Sauerstoffbiaslanze gasgekühlt, was 0,25% der Längserstreckung ausmacht. In dem Bereich der Sauerstoffblaslanze, in dem der Kühlmantel nicht von dem oder den Kühlgaskanälen gebildet wird, wird der Kühlmantel von dem oder den Kühlmittelkanälen für Kühlwasser gebildet.  In the case of a longitudinal extent of the oxygen blowing lance of, for example, 25 m, for example, at least the last 6.25 cm of the oxygen lance are gas-cooled, which amounts to 0.25% of the longitudinal extent. In the region of the oxygen blowing lance, in which the cooling jacket is not formed by the cooling gas channel (s), the cooling jacket is formed by the coolant channel (s) for cooling water.
Dadurch, dass nicht die gesamte Sauerstoffblaslanze durch Kühlgas gekühlt wird, wird die Fertigung der Sauerstoffblaslanze einfacher im Vergleich zu einer allein durch Kühlgas gekühlten Sauerstoffblaslanze.  The fact that not the entire oxygen blowing lance is cooled by cooling gas, the production of the oxygen blowing lance is easier compared to a cooled solely by cooling gas Sauerstoffblaslanze.
Als Kühlgas wird beispielsweise Druckluft, Stickstoff oder Sauerstoff verwendet, aus Kostengründen bevorzugt Druckluft. Der zumindest eine mit einer Zuleitung für Kühlgas verbundene Kühlgaskanal kann lanzenkopfseitig offen oder geschlossen sein. Er kann auch eine Ableitung für Kühlgas aufweisen. Wenn er offen ist, kann das Kühlgas aus der Sauerstofflanze austreten. Wenn er geschlossen ist, kann das Kühlgas durch die Ableitung aus der Sauerstoffblaslanze abgeleitet werden. Anhand der folgenden schematischen beispielhaften Figuren zu Ausführungsformen der Erfindung wird diese erläutert. As a cooling gas, for example, compressed air, nitrogen or oxygen is used, for cost reasons preferably compressed air. The at least one cooling gas channel connected to a feed line for cooling gas can be open or closed on the lance head side. He may also have a derivative for cooling gas. If it is open, the cooling gas can escape from the oxygen lance. When it is closed, the cooling gas can be discharged through the discharge from the oxygen blowing lance. The following schematic exemplary figures for embodiments of the invention will be explained.
Figur 1 zeigt eine Ausführungsform mit lanzenkopfseitig geschlossenem Kühlgaskanal einer erfindungsgemäßen Sauerstoffblaslanze mit einer Ableitung für Kühlgas in einem Längsschnitt, 1 shows an embodiment with a lance head closed cooling gas channel of an oxygen blowing lance according to the invention with a discharge for cooling gas in a longitudinal section,
Figur 2 zeigt eine Ausführungsform mit lanzenkopfseitig offenem Kühigaskanal einer erfindungsgemäßen Sauerstoffblaslanze in einem Längsschnitt. In Figur 1 weist der Kühlmantel 1 im lanzenkopfseitige Bereich der Sauerstoffblaslanze 2 einen mit einer Zuleitung für Kühlgas 3 verbundenen Kühlgaskanal 4 auf. Der  Figure 2 shows an embodiment with lance head side open Kühigaskanal a Sauerstoffblaslanze invention in a longitudinal section. In FIG. 1, the cooling jacket 1 in the lance-head-side region of the oxygen blowing lance 2 has a cooling gas channel 4 connected to a feed line for cooling gas 3. Of the
Kühlgaskanal 4 ist lanzenkopfseitig geschlossen und weist eine Ableitung für Kühlgas 5 auf. Das Kühlgas ist durch gerade Pfeile dargestellt. Der Kühlmantel 1 umgibt die Sauerstoffleitung 6 entlang ihrer Längserstreckung. Der in der Sauerstoffleitung 6 geleitete Sauerstoff ist durch gezackte Pfeile dargestellt. Der Kühlmantel 1 weist einen Kühlmittelkanai für Kühlwasser 7 auf, der mit einer Zuleitung 8 und einer Ableitung 9 für Kühlwasser verbunden ist. Das Kühlwasser ist durch Pfeile mit doppelt strichliertem Schaft dargestellt. Die Darstellung des Kühlmantels ist schematisch und vereinfacht, selbstverständlich wird beispielsweise das Kühlwasser nicht in hydraulischem Coolant gas channel 4 is closed on the lance head and has a discharge for cooling gas 5. The cooling gas is represented by straight arrows. The cooling jacket 1 surrounds the oxygen line 6 along its longitudinal extent. The oxygen conducted in the oxygen line 6 is represented by jagged arrows. The cooling jacket 1 has a Kühlmittelkanai for cooling water 7, which is connected to a supply line 8 and a discharge 9 for cooling water. The cooling water is represented by arrows with double-dashed shaft. The representation of the cooling jacket is schematic and simplified, of course, for example, the cooling water is not in hydraulic
Kurzschluss geführt. Short circuit led.
In Figur 2 werden für entsprechende Teile die gleichen Bezugszeichen wie in Figur 1 verwendet. In Figur 2 ist der Kühlgaskanal 4 lanzenkopfseitig offen. Das Kühlgas tritt lanzenkopfseitig aus dem Kühigaskanal 4 aus. In FIG. 2, the same reference numerals as in FIG. 1 are used for corresponding parts. In Figure 2, the cooling gas channel 4 lance head side open. The cooling gas exits lance head side from the Kühigaskanal 4.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
1 Kühlmantel  1 cooling jacket
2 Sauerstoffblaslanze  2 oxygen blowing lance
3 Zuleitung für Kühlgas  3 supply line for cooling gas
4 Kühlgaskanal 4 cooling gas duct
5 Ableitung für Kühlgas  5 discharge for cooling gas
6 Sauerstoffleitung  6 oxygen line
7 Kühlmittelkanal für Kühlwasser 7 coolant channel for cooling water
8 Zuleitung für Kühlwasser 9 Ableitung für Kühlwasser 8 Supply line for cooling water 9 Discharge for cooling water

Claims

Patentansprüche: claims:
1. Sauerstoffblaslanze (2) mit zumindest einer Sauerstoffleitung (6), welche 1. oxygen blowing lance (2) with at least one oxygen line (6), which
zumindest entlang ihrer Längserstreckung von einem Kühlmantel (1) umgeben ist, wobei der Kühlmantel (1) zumindest einen Kühlmittelkanal für Kühlwasser (7) aufweist, der mit einer Zuleitung (8) und einer Ableitung (9) für Kühlwasser verbunden ist, dadurch gekennzeichnet, dass der Kühlmantel (1) zusätzlich zumindest einen mit einer Zuleitung für Kühlgas (3) verbundenen Kühlgaskanal (4) aufweist.  at least along its longitudinal extent by a cooling jacket (1) is surrounded, wherein the cooling jacket (1) at least one coolant channel for cooling water (7), which is connected to a supply line (8) and a discharge (9) for cooling water, characterized the cooling jacket (1) additionally has at least one cooling gas channel (4) connected to a supply line for cooling gas (3).
2. Sauerstoffblaslanze (2) nach Anspruch 1 , dadurch gekennzeichnet, dass der Kühlmantel (1) in einem den Lanzenkopf umfassenden lanzenkopfseitigen Bereich der Sauerstoffblaslanze (2) von dem zumindest einen Kühlgaskanal (4) gebildet wird.  2. oxygen blowing lance (2) according to claim 1, characterized in that the cooling jacket (1) in a lance head comprehensive lancet head-side region of the oxygen blowing lance (2) of the at least one cooling gas channel (4) is formed.
3. Sauerstoffblaslanze (2) nach Anspruch 1 oder Anspruch 2, dadurch  3. oxygen blowing lance (2) according to claim 1 or claim 2, characterized
gekennzeichnet, dass sich der den Lanzenkopf umfassende lanzenkopfseitige Bereich der Sauerstoffbiaslanze (2), in dem der Kühlmantel (1) von dem zumindest einen Kühlgaskanal (4) gebildet wird, vom lanzenkopfseitigen Ende der Sauerstoffblaslanze (2) aus über zumindest 0,25% bis zu 90% der  characterized in that the lance head comprehensive lanzenkopfseitige range of Sauerstoffbiaslanze (2), in which the cooling jacket (1) of the at least one cooling gas channel (4) is formed, from the lanzenkopfseitigen end of Sauerstoffblaslanze (2) from at least 0.25% to 90% of
Längserstreckung der Sauerstoffblaslanze (2) erstreckt.  Longitudinal extent of the oxygen blowing lance (2) extends.
PCT/EP2010/067636 2010-01-13 2010-11-17 Partially gas-cooled oxygen blowing lance WO2011085843A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT332010A AT508664B1 (en) 2010-01-13 2010-01-13 PARTIAL GAS COOLED OXYGEN BLASTER
ATA33/2010 2010-01-13

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WO2011085843A1 true WO2011085843A1 (en) 2011-07-21

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1303213A (en) * 1971-03-23 1973-01-17
US5308043A (en) * 1991-09-20 1994-05-03 Ausmelt Pty. Ltd. Top submergable lance
JP2003034816A (en) * 2001-07-25 2003-02-07 Nkk Corp Method for preventing wearing of nozzle part in device for feeding oxygen-containing gas
WO2004046391A1 (en) * 2002-11-16 2004-06-03 Vai Fuchs Gmbh Method and device for cooling blowing lances

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1303213A (en) * 1971-03-23 1973-01-17
US5308043A (en) * 1991-09-20 1994-05-03 Ausmelt Pty. Ltd. Top submergable lance
JP2003034816A (en) * 2001-07-25 2003-02-07 Nkk Corp Method for preventing wearing of nozzle part in device for feeding oxygen-containing gas
WO2004046391A1 (en) * 2002-11-16 2004-06-03 Vai Fuchs Gmbh Method and device for cooling blowing lances

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AT508664A4 (en) 2011-03-15

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