EP0688876B1 - Cooled mantle ring for a converter - Google Patents

Cooled mantle ring for a converter Download PDF

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Publication number
EP0688876B1
EP0688876B1 EP95250136A EP95250136A EP0688876B1 EP 0688876 B1 EP0688876 B1 EP 0688876B1 EP 95250136 A EP95250136 A EP 95250136A EP 95250136 A EP95250136 A EP 95250136A EP 0688876 B1 EP0688876 B1 EP 0688876B1
Authority
EP
European Patent Office
Prior art keywords
converter
mantle ring
inner face
mantle
cooled
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
EP95250136A
Other languages
German (de)
French (fr)
Other versions
EP0688876A3 (en
EP0688876A2 (en
Inventor
Karlheinz Langlitz
Gunter Schmitz
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0688876A2 publication Critical patent/EP0688876A2/en
Publication of EP0688876A3 publication Critical patent/EP0688876A3/en
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Publication of EP0688876B1 publication Critical patent/EP0688876B1/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
    • C21C5/4646—Cooling arrangements
    • 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
    • C21C5/4633—Supporting means

Definitions

  • the invention relates to a cooled converter support ring consisting of a steel jacket with an inner surface, which in Distance to the converter arranged, this encompasses and the one Coolant supply station is connected.
  • Converters for steelmaking are available in bulk from a certain size Support rings stored. With the increased demand on the Performance of the converter vessel, especially in the
  • the thermal load on the converter wall as well as that of the Tragringes always higher. This thermal load also affects at a distance of about 100 to 200 mm from the converter arranged support ring.
  • the invention has set itself the goal of a cooling system for one To create converter support ring, which with simple means a free Accessibility of the support ring allowed and with low energy consumption ensures safe cooling of the loaded bearing ring surfaces.
  • a predominantly on the jacket of the converter support ring meandering tubular coolant guide intended.
  • Parts of the coolant guide for example Breakthroughs through the transverse bulkheads can be parallel guided pipes can be designed.
  • the coil is arranged so that the individual parallel pipe pieces at least a distance of have twice the diameter (based on the center line), so that broad parts of the supporting ring jacket are cooled from a cooling line, without contacting the cooling medium.
  • the advantage of this is not just the possibility of reducing the required Coolant amount while increasing the Flow rate, but also leaving free areas for the purpose of checking the support ring jacket, for example after cracks or the like.
  • stop the coolant supply for a short time without large amounts of water flowing in.
  • the inventors furthermore propose to include part of the support ring jacket to be included in the cooling system.
  • Pipe profiles are used for this like half pipe, angle and U profile. These can be done using simple Connect the welds intimately to the support ring jacket.
  • a cooling block which for example made of aluminum and connected to each other Has holes. This block is against the contact mass Inner surface of the support ring pressed. It is also proposed that Split coolant guides into separate cooling circuits and separate them into to connect a control device. Through this measure, the Energy consumption can be reduced even further, since here the burden adapted the cooling can be started.
  • FIG 1 is a cutout with a refractory lining 12 provided converter jacket 11 of the converter 10 is shown.
  • a converter support ring 20 is arranged at a distance from the converter 10 the transverse pod 26 connected to the support ring jacket 21 has.
  • At the Inner surface 22 is on the upper flange 23, on the lower flange 25 and on the Converter 10 facing inside 24 of the support ring jacket 21 a Pipe coil 31 is provided.
  • FIG. 2 shows various embodiments of this tube coil, which is designed as a tube profile 32 and, in the examples shown, is attached to the inside 24 of the support ring jacket 21.
  • the tubular profile 32 is designed as a square 33, which is welded to the inside 24 and is connected to the latter via a contact mass 41 in terms of heat flow.
  • an angle 34, a half-tube 35 and a U-profile 36 are shown, the free ends of the profiles being connected to the inside 24 and forming the tube profile 32 with it.
  • a block 37 is shown in which bores 38 are made. The block 37 is connected to the inside 24 of the support ring jacket 21 via a contact mass 41.
  • FIG. 3 shows a longitudinal section through the upper chord 23 and the lower chord 25 and the transverse pod 26 of the support ring 20.
  • the meandering course of the pipe coil 31 is shown in a top view, namely in the left side of the cooling circuit K1 with a substantially vertical flow direction and the right side of the cooling circuit K2 with an essentially horizontal cooling coil guide.
  • the cooling circuits K1 and K2 are connected to a control and regulating device 54, which have a safety valve 51, a pressure switch 52 and a temperature sensor 53.

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  • 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)
  • General Induction Heating (AREA)
  • Discharge Heating (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

A cooled converter trunnion ring, which is arranged at a distance from the converter, encompasses the converter and is connected to a coolant supply station. In order to achieve good accessibility of the trunnion ring by simple measures and to ensure reliable cooling of the loaded trunnion ring areas with low energy expenditure, a pipe coil, which runs in a largely meandering fashion and through which a liquid coolant flows, is provided on the inner surface of the inner side member substantially facing the converter of the steel mantle of the converter trunnion ring.

Description

Die Erfindung betrifft einen gekühlten Konvertertragring bestehend aus einem Stahlmantel mit einer Innenfläche, der im Abstand zum Konverter angeordnet, diesen umgreift und der an eine Kühlmittelversorgungsstation angeschlossen ist.The invention relates to a cooled converter support ring consisting of a steel jacket with an inner surface, which in Distance to the converter arranged, this encompasses and the one Coolant supply station is connected.

Konverter für die Stahlerzeugung sind ab einer gewissen Größe in losen Tragringen gelagert. Bei der gesteigerten Anforderung an die Leistungsfähigkeit des Konvertergefäßes, insbesondere bei derConverters for steelmaking are available in bulk from a certain size Support rings stored. With the increased demand on the Performance of the converter vessel, especially in the

Verwendung von feuerfest Ausmauerungen mit hohem Kohlenstoffgehalt, wird die thermische Belastung der Konverterwand wie auch die des Tragringes immer höher. Diese thermische Belastung wirkt sich auch auf den mit einem Abstand von etwa 100 bis 200 mm vom Konverter angeordneten Tragring aus.Use of refractory bricks with high carbon content, the thermal load on the converter wall as well as that of the Tragringes always higher. This thermal load also affects at a distance of about 100 to 200 mm from the converter arranged support ring.

Um ein überschreiten der zulässigen Grenzen des Gefäßmantels zu verhindern, um gleichzeitig die thermische Belastung des Konvertragringes zu mindern, wird in den Zwischenraum zwischen Ring und Gefäßmantel ein Kühlmedium geführt. So ist aus der Schrift EP 0 413 925 A A1 ein Luftkühlsystem für mit losem Tragring ausgerüstete warmgängige metallurgische Gefäße bekannt, bei dem auf der Außenseite des Tragringes Luftkanäle angeordnet sind, über die Kühlluft zwischen Tragring und Außenwand des metallurgischen Gefäßes geführt wird.To exceed the permissible limits of the vessel jacket prevent at the same time the thermal load of the To reduce the contract ring is in the space between the ring and Vessel jacket out a coolant. So from the document EP 0 413 925 A A1 is an air cooling system for warm-running vehicles equipped with a loose support ring metallurgical vessels known in which on the outside of the Tragringes air channels are arranged over the cooling air between Support ring and outer wall of the metallurgical vessel is guided.

Nachteil dieses Luftkühlsystems ist nicht nur die geringe Fähigkeit von gasförmigen Medien, wärme abzuführen, sondern auch das aus Umweltgründen recht ungern gesehene Abblasen der Luft.The disadvantage of this air cooling system is not only the low ability of gaseous media to dissipate heat, but also for environmental reasons Reluctant blowing of the air.

Weiterhin ist es bekannt, den Tragring zum Zwecke der Kühlung vollständig mit Wasser zu füllen. Das durch die Tragzapfen zu- bzw. abgeführte Wasser erhöht in nachteiliger Weise das Gewicht des Tragringes. Darüber hinaus kann bei besonderen Störfällen, beispielsweise bei einem Gefäßdurchbruch der Tragring in Mitleidenschaft gezogen werden, so daß in gefährlicher Weise flüssige Schmelze und nicht beeinflußbare Wassermengen unterhalb des Konverters zusammentreffen. Darüber hinaus kommt es bei hohen thermischen Belastungen des Tragringmantels, insbesondere bei der geringen Fließgeschwindigkeit des Kühlwassers, an der Innenwand zu Bläschenbitdungen - sog.It is also known to support the support ring for cooling fill completely with water. The by the trunnion or discharged water adversely increases the weight of the Support ring. In addition, in the event of special accidents, for example, if the support ring suffers from a vascular breakthrough be pulled so that liquid melt is dangerous and not influenceable amounts of water meet below the converter. In addition, it occurs at high thermal loads Tragringmantels, especially with the low flow rate of Cooling water, on the inner wall to bubble bitings - so-called

Leidenfrosteffekt - mit der negativen Folge, daß die Wärmeabfuhr an diesen Stellen behindert wird.Suffering frost effect - with the negative consequence that the heat dissipation these places is hindered.

Weiterhin ist durch das Auffüllen des Innenraums des Konvertertragringes eine Zugänglichkeit für Kontroll- und Wartungsarbeiten nicht mehr gegeben. Furthermore, by filling the interior of the converter support ring an accessibility for control and maintenance work no longer given.

Die Erfindung hat sich das Ziel gesetzt, ein Kühlsystem für einen Konvertertragring zu schaffen, der mit einfachen Mitteln eine freie Zugänglichkeit des Tragringes erlaubt und mit geringem Energieaufwand eine sichere Kühlung der belasteten Tragringflächen gewährleistet.The invention has set itself the goal of a cooling system for one To create converter support ring, which with simple means a free Accessibility of the support ring allowed and with low energy consumption ensures safe cooling of the loaded bearing ring surfaces.

Die Erfindung löst dieses Problem mit den kennzeichnenden Merkmalen des Anspruchs 1. Vorteilhafte Weiterbildungen sind in den Unteransprüchen dargelegt.The invention solves this problem with the characterizing features of Claim 1. Advantageous further developments are in the subclaims spelled out.

Erfindungsgemäß wird am Mantel des Konvertertragringes eine überwiegend meanderartig verlegte rohrförmig ausgebildete Kühlmittelführung vorgesehen. Teile der Kühlmittelführung, beispielsweise bei Durchbrüchen durch die Querschottbleche können dabei durch parallel geführte Rohre ausgestaltet sein. Durch diese Rohrschlange wird Kühlwasser in relativ geringer Menge aber mit relativ hoher Geschwindigkeit geführt. Die Rohrschlange ist dabei so angeordnet, daß die einzelnen parallel geführten Rohrstücke mindestens einen Abstand des doppelten Durchmessers (bezogen auf die Mittellinie) aufweisen, so daß von einer Kühllinie aus breite Teile des Tragringmantels gekühlt werden, ohne dabei mit dem Kühlmedium in Kontakt zu treten. Der Vorteil hiervon ist nicht nur die Möglichkeit der Reduzierung der erforderlichen Kühlmittelmenge bei gleichzeitiger Erhöhung der Strömungsgeschwindigkeit, sondern auch das Belassen von freien Flächen zwecks Kontrolle des Tragringmantels beispielsweise nach Rissen o. ä. Weiterhin läßt sich bei extremen Notfällen, etwa bei örtlicher Zerstörung des Tragringes, die Kühlmittelzufuhr kurzfristig stoppen, ohne daß größere Wassermengen nachfließen.According to the invention, a predominantly on the jacket of the converter support ring meandering tubular coolant guide intended. Parts of the coolant guide, for example Breakthroughs through the transverse bulkheads can be parallel guided pipes can be designed. Through this pipe coil Cooling water in a relatively small amount but with a relatively high one Speed led. The coil is arranged so that the individual parallel pipe pieces at least a distance of have twice the diameter (based on the center line), so that broad parts of the supporting ring jacket are cooled from a cooling line, without contacting the cooling medium. The advantage of this is not just the possibility of reducing the required Coolant amount while increasing the Flow rate, but also leaving free areas for the purpose of checking the support ring jacket, for example after cracks or the like. Furthermore, in extreme emergencies, such as local ones Destruction of the support ring, stop the coolant supply for a short time, without large amounts of water flowing in.

Die Erfinder schlagen weiterhin vor, einen Teil des Tragringmantels mit in das Kühlsystem einzubeziehen. Zum Einsatz kommen hierzu Rohrprofile wie Halbrohr, Winkel- und U-Profil. Diese lassen sich über einfache Schweißnähte innig mit dem Tragringmantel verbinden.The inventors furthermore propose to include part of the support ring jacket to be included in the cooling system. Pipe profiles are used for this like half pipe, angle and U profile. These can be done using simple Connect the welds intimately to the support ring jacket.

In einer weiteren Ausgestaltung wird ein Kühlblock vorgeschlagen, der beispielsweise aus Aluminium besteht und miteinander verbundene Bohrungen aufweist. Dieser Block wird über eine Kontaktmasse gegen die Innenfläche des Tragringes gedrückt. Weiterhin wird vorgeschlagen, die Kuhlmittelführungen in separate Kühlkreisläufe aufzuteilen und diese in eine Regeleinrichtung anzuschließen. Durch diese Maßnahme kann der Energieverbrauch noch weiter gesenkt werden, da hier an die Belastung angepaßt die Kühlung in Gang gesetzt werden kann.In a further embodiment, a cooling block is proposed, which for example made of aluminum and connected to each other Has holes. This block is against the contact mass Inner surface of the support ring pressed. It is also proposed that Split coolant guides into separate cooling circuits and separate them into to connect a control device. Through this measure, the Energy consumption can be reduced even further, since here the burden adapted the cooling can be started.

Ein Beispiel der Erfindung ist in der beigefügten Zeichnung dargetegt. Dabei zeigt die

  • Figur 1 einen Schnitt durch den Konvertertragring
  • Figur 2 Ausgestaltungen der Rohrschlange
  • Figur 3 eine Meß- und Regeleinrichtung der Kühlwasserführung.
    • An example of the invention is shown in the accompanying drawing. The shows
  • 1 shows a section through the converter support ring
  • Figure 2 configurations of the coil
  • Figure 3 shows a measuring and control device of the cooling water guide.

    • In der Figur 1 ist als Ausschnitt der mit einer feuerfesten Auskleidung 12 versehene konvertermantet 11 des Konverters 10 dargestellt. Vom Konverter 10 beabstandet ist ein Konvertertragring 20 angeordnet der mit dem Tragringmantel 21 verbundene Querschote 26 besitzt. An der Innenfläche 22 ist am Übergurt 23, am Untergurt 25 sowie auf der dem Konverter 10 zugewandten Innenseite 24 des Tragringmantels 21 eine Rohrschlange 31 vorgesehen.In Figure 1 is a cutout with a refractory lining 12 provided converter jacket 11 of the converter 10 is shown. A converter support ring 20 is arranged at a distance from the converter 10 the transverse pod 26 connected to the support ring jacket 21 has. At the Inner surface 22 is on the upper flange 23, on the lower flange 25 and on the Converter 10 facing inside 24 of the support ring jacket 21 a Pipe coil 31 is provided.

    In der Figur 2 sind verschiedene Ausführungsformen dieser als Rohrprofil 32 ausgebildeten Rohrschlange dargestellt, die in den ausgeführten Beispielen an der Innenseite 24 des Tragringmantels 21 angebracht sind. In der linken oberen Hälfte der Figur 2 ist das Rohrprofil 32 als Vierkant 33 ausgebildet, das an der Innenseite 24 angeschweißt ist und über eine Kontaktmasse 41 wärmestrommäßig mit dieser verbunden ist. In dem danach folgenden Beispiel ist ein Winkel 34, ein Halbrohr 35 und ein U-Profil 36 dargestellt, wobei die jeweils freien Enden der Profile mit der Innenseite 24 verbunden sind und mit dieser das Rohrprofil 32 bilden.
    Als letztes Beispiel ist ein Block 37 dargestellt, in dem Bohrungen 38 eingebracht sind. Der Block 37 ist über eine Kontaktmasse 41 mit der Innenseite 24 des Tragringmantels 21 verbunden.    FIG. 2 shows various embodiments of this tube coil, which is designed as a tube profile 32 and, in the examples shown, is attached to the inside 24 of the support ring jacket 21. In the upper left half of FIG. 2, the tubular profile 32 is designed as a square 33, which is welded to the inside 24 and is connected to the latter via a contact mass 41 in terms of heat flow. In the example that follows, an angle 34, a half-tube 35 and a U-profile 36 are shown, the free ends of the profiles being connected to the inside 24 and forming the tube profile 32 with it.
    As a last example, a block 37 is shown in which bores 38 are made. The block 37 is connected to the inside 24 of the support ring jacket 21 via a contact mass 41.

    Die Figur 3 zeigt einen Längsschnitt durch den Obergurt 23 und den Untergurt 25 sowie die Querschote 26 des Tragringes 20. In Draufsicht ist der meanderförmige Verlauf der Rohrschlange 31 dargestellt, und zwar in der linken Seite der Kühlkreislauf K1 mit einer im wesentlichen vertikalen Fließrichtung und der rechten Seite der Kühlkreislauf K2 mit einer im wesentlichen horizontalen Kühlschlangenführung.
    Die Kühlkreisläufe K1 und K2 sind mit einer Steuer- und Regeleinrichtung 54 verbunden, die ein Sicherheitsventil 51, einen Druckwächter 52 sowie einen Temperaturfühler 53 aufweisen.     FIG. 3 shows a longitudinal section through the upper chord 23 and the lower chord 25 and the transverse pod 26 of the support ring 20. The meandering course of the pipe coil 31 is shown in a top view, namely in the left side of the cooling circuit K1 with a substantially vertical flow direction and the right side of the cooling circuit K2 with an essentially horizontal cooling coil guide.
    The cooling circuits K1 and K2 are connected to a control and regulating device 54, which have a safety valve 51, a pressure switch 52 and a temperature sensor 53.

    Positionsliste:Position list:

    1010th
    Konverterconverter
    1111
    KonvertermantelConverter jacket
    1212th
    Feuerfest AuskleidungFireproof lining
    2020th
    TragringSupport ring
    2121
    TragringmantelTragringmantel
    2222
    InnenflächeInner surface
    2323
    ObergurtTop chord
    2424th
    Innenseiteinside
    2525th
    UntergurtLower chord
    2626
    QuerschotTransverse bulkhead
    3030th
    KühlmittelführungCoolant management
    3131
    RohrschlangePipe coil
    3232
    RohrprofilPipe profile
    3333
    VierkantSquare
    3434
    Winkelangle
    3535
    HalbrohrHalf pipe
    3636
    U-ProfilU profile
    3737
    Blockblock
    3838
    BohrungenHoles
    4040
    WärmeübertragungHeat transfer
    4141
    KontaktmasseContact mass
    5050
    RegelkreisControl loop
    5151
    SicherheitsventilSafety valve
    5252
    DruckwächterPressure switch
    5353
    TemperaturfühlerTemperature sensor
    5454
    Steuer- und RegeleinrichtungControl and regulating device
    aa
    Abstanddistance
    DD
    Durchmesserdiameter
    II.
    MittenachseCenter axis
    KK
    KühlkreislaufCooling circuit

    Claims (7)

    1. Cooled converter mantle ring consisting of a steel shell with an inner face, which ring, being disposed at a spacing from the converter, embraces tne latter and is connected to a coolant supply station,
      characterised in that a pipe coil, which is laid in meandering fashion and through which a liquid coolant flows, is provided at the inner face (22) of the steel shell (21), essentially at the inner side (24) of the converter mantle ring (20) which faces the converter, that the spacing (a) of two adjacent pipe coils (31), related to their central axes (1), is at least twice their diameter (D), and that a part of the pipe profile (32) of the pipe coil (31) is formed by the inner face (22) of the mantle ring shell (21).
    2. Cooled converter mantle ring according to claim 1,
      characterised in that the inner face (22) of the converter mantle ring (20) which forms the common wall of the pipe coil (31) corresponds in cross section to the circumference UT < 0.7 UR, where UT is the circumference formed by the inner face of the mantle ring and UR the remaining circumference of the pipe profile (32).
    3. Cooled converter mantle ring according to claim 1,
      characterised in that the pipe coil (31) is formed by holes (38) in a cooling block (37), wherein the cooling block (37) is joined all over to the inner face (22) of the converter mantle ring (20) via a contact substance (41).
    4. Cooled converter mantle ring according to claim 3,
      characterised in that the cooling block (37) consists of aluminium.
    5. Cooled converter mantle ring according to claim 3,
      characterised in that the contact substance (41) is a paste of a high conductivity.
    6. Cooled converter mantle ring according to one of the preceding claims,
      characterised in that the coolant guide (30) is divided into separate coolant circuits (K1-Kn).
    7. Cooled converter mantle ring according to claim 6,
      characterised in that the individual coolant circuits (K1, K2...Kn) are connected to a control circuit (50), are monitored by means of safety valves (51), manostats (52) and temperature sensors (53) and can be controlled in terms of their coolant quantity.
    EP95250136A 1994-06-20 1995-06-08 Cooled mantle ring for a converter Expired - Lifetime EP0688876B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE4423334 1994-06-20
    DE4423334A DE4423334C1 (en) 1994-06-20 1994-06-20 Cooled converter carrier ring

    Publications (3)

    Publication Number Publication Date
    EP0688876A2 EP0688876A2 (en) 1995-12-27
    EP0688876A3 EP0688876A3 (en) 1997-01-29
    EP0688876B1 true EP0688876B1 (en) 1999-07-28

    Family

    ID=6522167

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP95250136A Expired - Lifetime EP0688876B1 (en) 1994-06-20 1995-06-08 Cooled mantle ring for a converter

    Country Status (5)

    Country Link
    US (1) US5611990A (en)
    EP (1) EP0688876B1 (en)
    JP (1) JPH083617A (en)
    AT (1) ATE182629T1 (en)
    DE (2) DE4423334C1 (en)

    Families Citing this family (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US5853656A (en) * 1997-07-08 1998-12-29 Bethlehem Steel Corporation Apparatus and method for cooling a basic oxygen furnace trunnion ring
    CA2427409C (en) * 2003-05-01 2007-03-20 Whiting Equipment Canada Inc. Cooling system for a trunnion ring and metallurgical furnace vessel

    Family Cites Families (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE338307C (en) * 1921-06-15 Georg Sippel tripod
    AT225215B (en) * 1961-03-15 1963-01-10 Voest Ag Cooling device for cooling the hollow pivot or support pins on the support rings of crucibles for refining pig iron
    DE1458847A1 (en) * 1965-07-22 1969-01-30 Demag Ag Muzzle ring for metallurgical vessels, especially converters
    AT338307B (en) * 1973-07-23 1977-08-25 Voest Ag METALLURGICAL VESSEL, IN PARTICULAR CONVERTER
    DE3333841C1 (en) * 1983-09-20 1984-08-30 Mannesmann AG, 4000 Düsseldorf Metallurgical vessel, in particular stationary or exchangeable steel mill converters
    DE3927928A1 (en) * 1989-08-24 1991-02-28 Gutehoffnungshuette Man AIR COOLING SYSTEM FOR METALLURGICAL VESSELS STORED IN A CARRIER

    Also Published As

    Publication number Publication date
    DE59506455D1 (en) 1999-09-02
    EP0688876A3 (en) 1997-01-29
    DE4423334C1 (en) 1995-10-05
    US5611990A (en) 1997-03-18
    JPH083617A (en) 1996-01-09
    EP0688876A2 (en) 1995-12-27
    ATE182629T1 (en) 1999-08-15

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