EP0049890A2 - Rotary ladle turret - Google Patents

Rotary ladle turret Download PDF

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Publication number
EP0049890A2
EP0049890A2 EP81108224A EP81108224A EP0049890A2 EP 0049890 A2 EP0049890 A2 EP 0049890A2 EP 81108224 A EP81108224 A EP 81108224A EP 81108224 A EP81108224 A EP 81108224A EP 0049890 A2 EP0049890 A2 EP 0049890A2
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EP
European Patent Office
Prior art keywords
platform
ladle
column
turret
electrodes
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.)
Granted
Application number
EP81108224A
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German (de)
French (fr)
Other versions
EP0049890A3 (en
EP0049890B1 (en
Inventor
Rudolf Hoffmann
Adolf Gustav Zajber
Herbert Hansen
Johannes Drüppel
Klaus Bick
Friedhelm Vennmann
Lothar Dipl.-Ing. Harmsen
Gerd Schweers
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.)
SACK STRANGGIESSTECHNIK GmbH
Benteler Deustchland GmbH
MAN AG
Original Assignee
SACK STRANGGIESSTECHNIK GmbH
Benteler Deustchland GmbH
MAN Maschinenfabrik Augsburg Nuernberg 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.)
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Publication date
Application filed by SACK STRANGGIESSTECHNIK GmbH, Benteler Deustchland GmbH, MAN Maschinenfabrik Augsburg Nuernberg AG filed Critical SACK STRANGGIESSTECHNIK GmbH
Priority to AT81108224T priority Critical patent/ATE8115T1/en
Publication of EP0049890A2 publication Critical patent/EP0049890A2/en
Publication of EP0049890A3 publication Critical patent/EP0049890A3/en
Application granted granted Critical
Publication of EP0049890B1 publication Critical patent/EP0049890B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/12—Travelling ladles or similar containers; Cars for ladles
    • B22D41/13—Ladle turrets

Definitions

  • the invention relates to a ladle turret for a continuous caster with a fixed pivot column and two pivotable support arms for receiving ladles.
  • the use of a so-called ladle turret is known for the fully continuous supply of a continuous casting plant with molten metal.
  • the ladle turret is usually designed so that it either has a continuous rigid support arm with a receptacle for a ladle at the ends of the arm (DE-PS 1 220 562), or there are two independently pivotable support arms for each ladle provided (DE-PS 1 608 094), wherein the support arms are arranged one above the other on the common pivot column.
  • the molten steel in the ladle especially when it comes to smaller quantities - suffers from disadvantageous temperature losses, which initially occur when the melt is transported from the converter to the Steel extraction hall to the ladle turret.
  • the molten steel experiences a further drop in temperature during the pure casting operation, which can sometimes take up to 60 minutes can.
  • Excessively high temperature losses lead to premature bear formation in the ladle, which no longer enables perfect continuous casting, if, for example, due to low pouring speeds with relatively small strand dimensions and a small number of strands, a not so large pan content is to be poured with the longest possible emptying time.
  • the invention has for its object to provide a device for a ladle turret, which makes it possible that the temperature loss of the melt during transport compensated for a ladle suspended in the support arm of the turret and then kept the melt in a substantially constant temperature range for a long time can be.
  • this object is achieved in that a relative to the pivot column of the ladle turret. Swivel column rotatable platform with a heater for a ladle is arranged.
  • the heating device has a vertical guide column for guiding a height-adjustable boom with clamping devices for at least two electrodes that can be lowered into the interior of a ladle, the current-carrying cables of which are supplied via the boom and freely through the rotatable platform and the interior of the swivel column are laid up to a clamping plate arranged at such a distance from the platform that the twisting of the cables allows the boom or the electrodes to pivot - as seen from the pivoting position of the electrodes associated with the casting position - in both pivoting directions by approximately 180 °.
  • the electrodes are immersed in the melt, after the ladle is in the desired operating position. Due to malfunctions, which may make it necessary to stop the casting, which can occur, for example, in the event of strand breaks or damage to the plug or slide, the ladle must be swiveled as quickly as possible from the casting position to an emergency container. So that the lowered electrode device can also suffer this movement without being damaged, because the boom with the electrodes cannot be moved out of the ladle as quickly as required when the emergency arises, the current-carrying cables are arranged in such a way that a Corresponding twisting is permitted, which ultimately means that the entire device can be pivoted by almost 360.degree .. The pivotability also opens up the possibility, if necessary, of immersing the electrodes in the ladle which has just been taken over by the support arm can thus take place on the swivel path up to the operating position.
  • the eccentric position of the guide pillar means that the cables can be passed centrally through the platform and through the turret swivel pillar to the cable clamping plate.
  • the invention further provides that the rotary drive for the platform consists of an electric motor carried by the platform, the pinion of which meshes with a toothed ring fixed on the swivel column.
  • the lock according to claims 5 and 6 can be of the type that in an emergency, when the platform and ladle support arm must be moved together, a bolt or a wedge a connection between the platform on a signal from the control panel of the system by means of a hydraulic cylinder and the hub of the respective support arm, so that the pivotal movement is synchronized and the platform with the boom is carried along by the ladle support arm. It is also within the Invention, instead of mechanical locking to provide electrical synchronization (equal angular velocities) of the support arms and platform.
  • the exemplary embodiment shows the foundation 1 for a ladle turret, designated overall by 2, of an otherwise not shown continuous caster.
  • the ladle turret 2 has a central pivot column 3 on which the two independently pivotable support arms 4, 5 are arranged by means of hubs 4a, 5a.
  • Each support arm 4, 5 is fork-shaped and can accommodate a ladle 6 or 7.
  • a rotatable platform 8 is arranged on the swivel column 3 of the turret 2.
  • the platform 8 has a heating device denoted by 9, a guide column 10 for a boom 12 which can be raised and lowered being provided off-center on the platform 8.
  • Electrodes 14 are held by clamping devices 13 of the arm 12, which electrodes are lowered into the casting ladle in the casting position in order to heat up or keep the melt warm.
  • the boom 12 is raised and lowered by a cable connection 15 of the boom 12 to a drive motor 16.
  • One end of the cable 15 is fixed to a saddle 18 of the guide column 9. From here, the rope 15 is guided over deflection rollers 19 of the boom 12 or of the saddle 18 to a winding roller 22 of the motor 16 which is also anchored on the platform 8.
  • the rotary drive for the platform itself is attached to the platform.
  • the rotary drive consists of an electric motor 23, the pinion 24 meshes with the toothed ring 25 fixed on the swivel column 3 of the ladle turret 2.
  • To power the electrodes 14 are live cables 26 through the Cantilever 12 laid through the platform 8 and the interior of the pivot column 3 to a clamping plate 27. Since the platform 8 with the boom 12 must cover a swivel path of approximately 180 ° in the event of a possible emergency travel of a ladle support arm 4, 5, the distance to the cable clamping point must be selected such that the twisting of the current-carrying cable 26 pivots in such a manner allows.
  • the support arm 4 in the inoperative position I has just taken over a newly filled ladle 6 from the overhead crane.
  • the content of the ladle 7 in the pouring position II is almost potted, which can be seen from the completely lowered position of the boom 12.
  • the wear on the electrodes which is characterized by erosion, is compensated for with which the electrodes are located above the ladle.
  • the empty ladle is then exchanged for the filled ladle, for which purpose the support arms 4, 5 perform a rotary movement about the pivoting column 3. During this changeover period, the supply of the continuous casting plant with melt via the contents of the intermediate container 28 is maintained.
  • the empty ladle is removed from the overhead crane and the support arm is cleared for the fresh provision of a filled ladle.
  • the electrodes 14 for heating and keeping the melt warm are immersed in the filled ladle and the make-up of the intermediate container 28 is continued for continuous casting.
  • the prescribed correct ladle change can no longer be carried out if an emergency run of the ladle just pouring into position II is necessary in the event of a fault. In such a case, there is no time left to move the electrodes 14 out of the ladle before the support arm is pivoted. It must therefore be ensured that the platform 8 with the superstructures of the heating device is pivoted in synchronism with the support arm during emergency travel 4 or 5.
  • the support arms 4, 5 have fixed brackets 31 and 32, respectively.
  • a cylinder 33 is attached to the platform 8 in the casting position II and, for connecting the platform 8 to the support arm 4 or 5, introduces a bolt, for example a bolt or a wedge, into a not shown groove of the bracket 31 or 32 . It is advantageous that in the pouring position the locking is basically carried out during the duration of the pouring process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Furnace Details (AREA)
  • Continuous Casting (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Food-Manufacturing Devices (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

To avoid loss of temperature of a melt contained in casting ladles in a continuous casting operation, an independently rotatable platform adapted to receive a heating device is disposed on a slewing column of a slewing tower for ladles. The heating device is similar to that of an arc melting furnace and comprises a vertically adjustable electrode holder of outrigger configuration whose guide column is arranged eccentrically on the platform so that a current carrying cable can be installed to extend centrally through the platform and through the slewing column. The cables are secured by a clamping plate at a perpendicular distance from the platform, such that the electrode holder, as seen from the casting position, can pivot in both pivoting directions through approximately 180 DEG , without the cable tearing as a result of twisting.

Description

Die Erfindung betrifft einen Pfannendrehturm für eine Stranggießanlage mit einer ortsfesten Schwenksäule und zwei schwenkbaren Tragarmen zur Aufnahme von Gießpfannen.The invention relates to a ladle turret for a continuous caster with a fixed pivot column and two pivotable support arms for receiving ladles.

Zur vollkontinuierlichen Versorgung einer Stranggießanlage mit Metallschmelze ist der Einsatz eines sogenannten Pfannendrehturms bekannt. Der Pfannendrehturm ist dabei üblicherweise so ausgebildet, daß er entweder einen durchgehenden starren Tragarm mit je einer Aufnahme für eine Gießpfanne an den Enden des Armes aufweist (DE-PS 1 220 562), oder aber es sind zwei unabhängig voneinander schwenkbare Tragarme für jeweils eine Gießpfanne vorgesehen (DE-PS 1 608 094), wobei die Tragarme übereinanderliegend an der gemeinsamen Schwenksäule angeordnet sind.The use of a so-called ladle turret is known for the fully continuous supply of a continuous casting plant with molten metal. The ladle turret is usually designed so that it either has a continuous rigid support arm with a receptacle for a ladle at the ends of the arm (DE-PS 1 220 562), or there are two independently pivotable support arms for each ladle provided (DE-PS 1 608 094), wherein the support arms are arranged one above the other on the common pivot column.

Unabhängig davon, wie letztlich die Bereitstellungseinrichtung für die Gießpfannen konstruiert ist, muß davon ausgegangen werden, daß der flüssige Stahl in der Gießpfanne - insbesondere wenn es sich um kleinere Mengen handelt - nachteilige Temperaturverluste erleidet, die sich zunächst einstellen beim Antransport der Schmelze vom Konverter der Stahlgewinnungshalle bis zum Pfannendrehturm. Einen weiteren Temperaturabfall erfährt der flüssige Stahl während des reinen Gießbetriebes, der mitunter bis zu 60 Minuten betragen kann. Zu hohe Temperaturverluste führen vor allem dann zu einer vorzeitigen, ein einwandfreies Stranggießen nicht mehr ermöglichenden Bärenbildung in der Gießpfanne, wenn z.B. bedingt durch niedrige Gießgeschwindigkeiten bei relativ kleinen Strangabmessungen und geringer Strangzahl ein nicht so großer Pfanneninhalt bei längsknöglicher Entleerungszeit vergossen werden soll.Regardless of how the delivery device for the ladles is ultimately constructed, it must be assumed that the molten steel in the ladle - especially when it comes to smaller quantities - suffers from disadvantageous temperature losses, which initially occur when the melt is transported from the converter to the Steel extraction hall to the ladle turret. The molten steel experiences a further drop in temperature during the pure casting operation, which can sometimes take up to 60 minutes can. Excessively high temperature losses lead to premature bear formation in the ladle, which no longer enables perfect continuous casting, if, for example, due to low pouring speeds with relatively small strand dimensions and a small number of strands, a not so large pan content is to be poured with the longest possible emptying time.

Um den Temperaturverlusten entgegenzuwirken bzw. diese im zulässigen Rahmen zu halten, wurden im praktischen Betrieb vorgeheizte Pfannen eingesetzt und mit weit überhitzter Schmelze gefüllt, was selbstverständlich entsprechend erhöhte Konvertertemperaturen erforderlich macht. Weiterhin werden zur Verringerung der Abstrahlverluste auf die Pfannenschlacke noch zusätzlich große Mengen Lunkerpulver gestreut.In order to counteract the temperature losses or to keep them within the permissible range, preheated pans were used in practical operation and filled with far overheated melt, which of course requires correspondingly higher converter temperatures. Furthermore, in order to reduce the radiation losses on the ladle slag, large quantities of blowhol powder are scattered.

Der Erfindung liegt die Aufgabe zugrunde, für einen Pfannendrehturm eine Einrichtung zu schaffen, die es ermöglicht, daß die beim Antransport entstandenen Temperaturverluste der Schmelze einer in den Tragarm des Drehturms eingehängten Gießpfanne ausgeglichen und die Schmelze dann über längere Zeit in einem im wesentlichen konstanten Temperaturbereich gehalten werden.kann.The invention has for its object to provide a device for a ladle turret, which makes it possible that the temperature loss of the melt during transport compensated for a ladle suspended in the support arm of the turret and then kept the melt in a substantially constant temperature range for a long time can be.

Nach der Erfindung wird diese Aufgabe dadurch gelöst, daß auf der Schwenksäule des Pfannendrehturms eine relativ zur. Schwenksäule drehbare Plattform mit einer Heizeinrichtung für-eine Gießpfanne angeordnet ist. Eine Ausgestaltung der Erfindung sieht vor, daß die Heizeinrichtung eine senkrechte Führungssäule zur Führung eines höhenverstellbaren Auslegers mit Klemmvorrichtungen für mindestens zwei in das Innere einer Gießpfanne absenkbare Elektroden aufweist, deren stromführende Kabel über den Ausleger und frei durch die drehbare Plattform und das Innere der Schwenksäule hindurch bis zu einer in derartigem Abstand von der Plattform angeordneten Klemmplatte verlegt sind, daß die Verwindung der Kabel ein Verschwenken des Auslegers bzw. der Elektroden - von der der Gießposition zugeordneten Schwenklage der Elektroden gesehen.- in beiden Schwenkrichtungen um ca. 180° erlaubt. In der Regel werden die Elektroden in die Schmelze eingetaucht, nachdem sich die Gießpfanne in der gewünschten Betriebsposition befindet. Bedingt durch Störungen, die eventuell einen Gießabbruch notwendig machen, was beispielsweise bei Strangdurchbrüchen oder Stopfen- bzw. Schieberbeschädigungen eintreten kann, muß die Gießpfanne schnellstens aus der Gießposition bis über einen Notbehälter verschwenkt werden. Damit nun auch die abgesenkte Elektroden-einrichtung ohne Beschädigungen zu erleiden diese Bewegung mitmachen kann, weil der Ausleger mit den Elektroden beim Ein-" treten des Notfalles nicht so schnell wie erforderlich aus der Gießpfanne herausbewegbar ist, sind die stromführenden Kabel so angeordnet, daß eine entsprechende Verwindung erlaubt ist, was letztlich bedeutet, daß die gesamte Einrichtung um nahezu 360° verschwenkbar ist. Die Verschwenkbarkeit eröffnet darüber hinaus noch die Möglichkeit, die Elektroden gegebenenfalls bereits in der Außerbetriebsstellung in die soeben von dem Tragarm übernommene Gießpfanne einzutauchen. Ein Aufheizen der Schmelze kann somit schon auf dem Verschwenkweg bis in die Betriebsposition erfolgen.According to the invention this object is achieved in that a relative to the pivot column of the ladle turret. Swivel column rotatable platform with a heater for a ladle is arranged. One embodiment of the invention provides that the heating device has a vertical guide column for guiding a height-adjustable boom with clamping devices for at least two electrodes that can be lowered into the interior of a ladle, the current-carrying cables of which are supplied via the boom and freely through the rotatable platform and the interior of the swivel column are laid up to a clamping plate arranged at such a distance from the platform that the twisting of the cables allows the boom or the electrodes to pivot - as seen from the pivoting position of the electrodes associated with the casting position - in both pivoting directions by approximately 180 °. As a rule, the electrodes are immersed in the melt, after the ladle is in the desired operating position. Due to malfunctions, which may make it necessary to stop the casting, which can occur, for example, in the event of strand breaks or damage to the plug or slide, the ladle must be swiveled as quickly as possible from the casting position to an emergency container. So that the lowered electrode device can also suffer this movement without being damaged, because the boom with the electrodes cannot be moved out of the ladle as quickly as required when the emergency arises, the current-carrying cables are arranged in such a way that a Corresponding twisting is permitted, which ultimately means that the entire device can be pivoted by almost 360.degree .. The pivotability also opens up the possibility, if necessary, of immersing the electrodes in the ladle which has just been taken over by the support arm can thus take place on the swivel path up to the operating position.

Bei der Ausgestaltung der Erfindung nach Anspruch 3 bewirkt die außermittige Lage der Führungssäule, daß die Kabel mittig durch die Plattform und durch die Drehturm-Schwenksäule bis zur Kabel-Klemmplatte hindurchgeführt werden können.In the embodiment of the invention according to claim 3, the eccentric position of the guide pillar means that the cables can be passed centrally through the platform and through the turret swivel pillar to the cable clamping plate.

Die Erfindung sieht weiterhin vor, daß der Drehantrieb für die Plattform aus einem von der Plattform getragenen Elektromotor besteht, dessen Ritzel mit einem auf der Schwenksäule festgelegten Zahnkranz kämmt.The invention further provides that the rotary drive for the platform consists of an electric motor carried by the platform, the pinion of which meshes with a toothed ring fixed on the swivel column.

Die Verrriegelung nach den Ansprüchen 5 und 6 können der Art sein, daß im Notfall, wenn Plattform und Gießpfannen-Tragarm gemeinsam verfahren werden müssen, auf ein Signal vom Steuerpult der Anlage aus mittels eines hydraulischen Zylinders ein Bolzen oder ein Keil eine Verbindung zwischen der Plattform und der Nabe des jeweiligen Tragarms herstellt, womit bei der Schwenkbewegung ein Gleichlauf gegeben ist und die Plattform mit dem Ausleger von dem Gießpfannen-Tragarm mitgenommen wird. Es liegt auch im Rahmen der Erfindung, anstatt der mechanischen Verriegelung einen elektrischen Gleichlauf (gleiche Winkelgeschwindigkeiten) von Tragarmen und Plattform vorzusehen.The lock according to claims 5 and 6 can be of the type that in an emergency, when the platform and ladle support arm must be moved together, a bolt or a wedge a connection between the platform on a signal from the control panel of the system by means of a hydraulic cylinder and the hub of the respective support arm, so that the pivotal movement is synchronized and the platform with the boom is carried along by the ladle support arm. It is also within the Invention, instead of mechanical locking to provide electrical synchronization (equal angular velocities) of the support arms and platform.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt und im folgenden näher erläutert. Die einzige Zeichnungsfigur gibt die Ansicht eines auf dem Fundament verankerten Pfannendrehturms wieder,der zwei unabhängig voneinander an der Schwenksäule gel-agerte Tragarme besitzt und mit der erfindungsgemäßen Heizeinrichtung ausgerüstet ist.In the drawing, an embodiment of the invention is shown and explained in more detail below. The only drawing figure shows the view of a ladle turret anchored on the foundation, which has two support arms mounted independently of one another on the swivel column and is equipped with the heating device according to the invention.

Das Ausführungsbeispiel zeigt das Fundament 1 für einen insgesamt mit 2 bezeichneten Pfannendrehturm einer ansonsten nicht weiter abgebildeten Stranggießanlage. Der Pfannendrehturm 2 besitzt eine zentrale Schwenksäule 3, an welcher die beiden unabhängig voneinander schwenkbarenTragarme 4, 5 mittels Naben 4a, 5a angeordnet sind. Jeder Tragarm 4, 5 ist gabelförmig ausgebildet und kann eine Gießpfanne 6 bzw. 7 aufnehmen.The exemplary embodiment shows the foundation 1 for a ladle turret, designated overall by 2, of an otherwise not shown continuous caster. The ladle turret 2 has a central pivot column 3 on which the two independently pivotable support arms 4, 5 are arranged by means of hubs 4a, 5a. Each support arm 4, 5 is fork-shaped and can accommodate a ladle 6 or 7.

Auf der Schwenksäule 3 des Drehturms 2 ist eine drehbare Plattform 8 angeordnet. Die Plattform 8 weist eine mit 9 bezeichnete Heizeinrichtung auf, wobei außermittig auf der Plattform 8 eine Führungssäule 10 für einen heb- und senkbaren Ausleger 12 vorgesehen ist. Von Klemmeinrichtungen 13 des Auslegers 12 werden Elektroden 14 gehalten, die zum Aufheizen bzw. Warmhalten der Schmelze in die jeweils in Gießposition befindliche Gießpfanne abgesenkt werden. Das Heben und Senken des Auslegers 12 erfolgt durch-eine Seilverbindung 15 des Auslegers 12 mit einem Antriebsmotor 16. Ein Ende des Seils 15 ist fest mit einem Sattel 18 der Führungssäule 9 verbunden. Von hier aus wird das Seil 15 über Umlenkrollen 19 des Auslegers 12 bzw. des Sattels 18 bis zu einer Wickelrolle 22 des ebenfalls auf der Plattform 8 verankerten Motors 16 geführt. Weiterhin ist auch der Drehantrieb für die Plattform selbst auf der Plattform befestigt. Der Drehantrieb besteht aus einem Elektromotor 23, dessen Ritzel 24 mit dem auf der Schwenksäule 3 des Pfannendrehturms 2 festgelegten Zahnkranz 25 kämmt. Zur Stromversorgung der Elektroden 14 sind stromführende Kabel 26 über den Ausleger 12 durch die Plattform 8 und das Innere der Schwenksäule 3 bis zu einer Klemmplatte 27 verlegt. Da auch die Plattform 8 mit dem Ausleger 12 bei einer eventuellen Notfahrt eines Gießpfannen-Tragarmes 4, 5 einen Schwenkweg von ca. 180° zurücklegen muß, ist der Abstand bis zum Kabelklemmpunkt so zu wählen, daß die Verwindung der stromführenden Kabel 26 ein solches Verschwenken zuläßt.A rotatable platform 8 is arranged on the swivel column 3 of the turret 2. The platform 8 has a heating device denoted by 9, a guide column 10 for a boom 12 which can be raised and lowered being provided off-center on the platform 8. Electrodes 14 are held by clamping devices 13 of the arm 12, which electrodes are lowered into the casting ladle in the casting position in order to heat up or keep the melt warm. The boom 12 is raised and lowered by a cable connection 15 of the boom 12 to a drive motor 16. One end of the cable 15 is fixed to a saddle 18 of the guide column 9. From here, the rope 15 is guided over deflection rollers 19 of the boom 12 or of the saddle 18 to a winding roller 22 of the motor 16 which is also anchored on the platform 8. Furthermore, the rotary drive for the platform itself is attached to the platform. The rotary drive consists of an electric motor 23, the pinion 24 meshes with the toothed ring 25 fixed on the swivel column 3 of the ladle turret 2. To power the electrodes 14 are live cables 26 through the Cantilever 12 laid through the platform 8 and the interior of the pivot column 3 to a clamping plate 27. Since the platform 8 with the boom 12 must cover a swivel path of approximately 180 ° in the event of a possible emergency travel of a ladle support arm 4, 5, the distance to the cable clamping point must be selected such that the twisting of the current-carrying cable 26 pivots in such a manner allows.

In der dargestellten Situation ist von dem Tragarm 4 in der Außerbetriebsstellung I soeben eine neu gefüllte Gießpfanne 6 von dem Hallenkran übernommen worden. Der Inhalt der Gießpfanne 7 in der Gießstellung II ist nahezu vergossen, was durch die vollständig abgesenkte Lage des Auslegers 12 erkennbar ist. Im übrigen macht nicht nur der abnehmende Pfanneninhalt ein stetiges Absenken der Elektroden erforderlich, sondern auch der durch Abbrand gekennzeichnete Verschleiß an den Elektroden wird so ausgeglichen..Zum Gießpfannenwechsel muß der Ausleger 12 mit den Elektroden 14 zunächst bis in die strichpunktierte Lage aus der Gießpfanne herausgefahren werden, womit sich die Elektroden oberhalb der Gießpfanne befinden. Danach wird die leere gegen die gefüllte Gießpfanne getauscht, wozu die Tragarme 4, 5 eine Drehbewegung um die Schwenksäule 3 ausführen. Während dieser Wechselzeit wird die Versorgung der Stranggießanlage mit Schmelze über den Inhalt des Zwischenbehälters 28 aufrechterhalten. Mit Erreichen der Außerbetriebsstellung I wird die geleerte Pfanne vom Hallenkran abtransportiert und der Tragarm freigemacht zur neuerlichen Bereitstellung einer gefüllten Gießpfanne. Gleichzeitig werden in der Gießstellung II die Elektroden 14 zum Aufheizen und Warmhalten der Schmelze in die gefüllte Gießpfanne eingetaucht und die Nachspeisung des Zwischenbehälters 28 zum kontinuierlichen Stranggießen fortgesetzt.In the situation shown, the support arm 4 in the inoperative position I has just taken over a newly filled ladle 6 from the overhead crane. The content of the ladle 7 in the pouring position II is almost potted, which can be seen from the completely lowered position of the boom 12. In addition, not only does the decreasing pan content require a constant lowering of the electrodes, but also the wear on the electrodes, which is characterized by erosion, is compensated for with which the electrodes are located above the ladle. The empty ladle is then exchanged for the filled ladle, for which purpose the support arms 4, 5 perform a rotary movement about the pivoting column 3. During this changeover period, the supply of the continuous casting plant with melt via the contents of the intermediate container 28 is maintained. When the out-of-service position I is reached, the empty ladle is removed from the overhead crane and the support arm is cleared for the fresh provision of a filled ladle. At the same time, in the casting position II, the electrodes 14 for heating and keeping the melt warm are immersed in the filled ladle and the make-up of the intermediate container 28 is continued for continuous casting.

Der vorgeschriebene ordnungsgemäße Gießpfannenwechsel läßt sich nicht mehr durchführen, wenn im Störungsfall eine Notfahrt der gerade in Stellung II gießenden Pfanne notwendig ist. Es bleibt in einem solchen Fall keine Zeit mehr, um vor dem Verschwenken des Tragarmes die Elektroden 14 aus der Gießpfanne herauszubewegen. Daher muß gewährleistet sein, daß bei der Notfahrt 4 bzw. 5 die Plattform 8 mit den Aufbauten der Heizeinrichtung im Gleichlauf mit dem Tragarm verschwenkt wird.The prescribed correct ladle change can no longer be carried out if an emergency run of the ladle just pouring into position II is necessary in the event of a fault. In such a case, there is no time left to move the electrodes 14 out of the ladle before the support arm is pivoted. It must therefore be ensured that the platform 8 with the superstructures of the heating device is pivoted in synchronism with the support arm during emergency travel 4 or 5.

Bei der mechanischen Verriegelung gemäß dem Ausführungsbeispiel ist zur Erzielung eines Gleichlaufs vorgesehen, daß die Tragarme 4, 5 feste Konsolen 31 bzw. 32 aufweisen. An der Plattform 8 ist in der Gießposition II ein Zylinder 33 angebracht, der zur Verbindung der Plattform 8 mit dem Tragarm 4 bzw. 5 einen Riegel, beispielsweise einen Bolzen oder einen Keil, in eine nicht näher dargestellte Nut der Konsole 31 bzw. 32 einbringt. Es ist vorteilhaft, daß in Gießposition während des Dauer des Gießvorgangs die Verriegelung grundsätzlich vorgenommen wird.In the mechanical locking according to the exemplary embodiment, in order to achieve synchronism, it is provided that the support arms 4, 5 have fixed brackets 31 and 32, respectively. A cylinder 33 is attached to the platform 8 in the casting position II and, for connecting the platform 8 to the support arm 4 or 5, introduces a bolt, for example a bolt or a wedge, into a not shown groove of the bracket 31 or 32 . It is advantageous that in the pouring position the locking is basically carried out during the duration of the pouring process.

Claims (6)

1. Pfannendrehturm mit einer ortsfesten Schwenksäule und mindestens einem schwenkbaren Tragarm zur Aufnahme von Gießpfannen, dadurch gekennzeichnet, daß auf der Schwenksäule (3) des Pfannendrehturms (2) eine relativ zur Schwenksäule (3) drehbare Plattform (8) mit einer Heizeinrichtung (9) für eine Gießpfanne angeordnet ist.1. ladle turret with a fixed pivot column and at least one pivoting support arm for receiving ladles, characterized in that on the pivot column (3) of the ladle turret (2) a platform (8) rotatable relative to the pivot column (3) with a heating device (9) is arranged for a ladle. 2. Pfannendrehturm nach Anspruch 1, dadurch gekennzeichnet, daß die Heizeinrichtung (9) eine senkrechte Führungssäule (10) zur Führung eines höhenverstellbaren Auslegers (12) mit Klemmvorrichtungen (13) für mindestens zwei in das Innere einer Gießpfanne (6, 7) absenkbare Elektroden (14) aufweist, deren stromführende Kabel (26) über den Ausleger und frei durch die drehbare Plattform und das Innere der Schwenksäule hindurch bis zu einer in derartigem Abstand von der Plattform angeordneten Klemmplatte (27) verlegt sind, daß die Verwindung der Kabel (26) ein Verschwenken des Auslegers bzw. der Elektroden(12 bzw. 14) - von der der Gießposition zugeordneten Schwenklage der Elektroden gesehen - in beiden Schwenkrichtungen um ca. 180° erlaubt.2. ladle turret according to claim 1, characterized in that the heating device (9) has a vertical guide column (10) for guiding a height-adjustable arm (12) with clamping devices (13) for at least two in the interior of a ladle (6, 7) lowerable electrodes (14), the current-carrying cables (26) are laid over the boom and freely through the rotatable platform and the interior of the swivel column up to a clamping plate (27) arranged at a distance from the platform such that the twisting of the cables (26 ) pivoting of the cantilever or the electrodes (12 or 14) - viewed from the pivoting position of the electrodes assigned to the casting position - allowed in both pivoting directions by approximately 180 °. 3. Pfannendrehturm nach Anspruch 2, dadurch gekennzeichnet, daß die Führungssäule (10) außermittig auf der Plattform (8) angeordnet ist und die Kabel (26) mittig durch die Plattform hindurchgeführt sind.3. ladle turret according to claim 2, characterized in that the guide column (10) is arranged off-center on the platform (8) and the cables (26) are passed through the center of the platform. 4. Pfannendrehturm nach Anspruch 1, dadurch gekennzeichnet, daß der Drehantrieb für die Plattform (8) aus einem von der Plattform getragenen Elektromotor (23) besteht, dessen Ritzel (24) mit einem auf der Schwenksäule (3) festgelegten Zahnkranz (25) kämmt.4. ladle turret according to claim 1, characterized in that the rotary drive for the platform (8) consists of an electric motor carried by the platform (23), the pinion (24) meshes with a on the swivel column (3) fixed ring gear (25) . 5. Pfannendrehturm nach Anspruch 1, dadurch gekennzeichnet, daß die Plattform (8) in Gießposition (II) einer Gießpfanne (7) mit der Nabe (5a) des die Gießpfanne tragenden Tragarmes (5) verriegelbar ist.5. ladle turret according to claim 1, characterized in that the platform (8) in the casting position (II) of a ladle (7) with the hub (5a) of the ladle supporting the arm (5) can be locked. 6. Pfannendrehturm mit zwei unabhängig voneinander schwenkbaren Tragarmen, deren Naben übereinanderliegen, nach Anspruch 5, dadurch gekennzeichnet, daß die Plattform (8) auch mit der Nabe (4a) des unteren Tragarmes (4) verriegelbar ist.6. pan turret with two independently pivotable support arms, the hubs are one above the other, according to claim 5, characterized in that the platform (8) can also be locked with the hub (4 a) of the lower support arm (4).
EP81108224A 1980-10-15 1981-10-12 Rotary ladle turret Expired EP0049890B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81108224T ATE8115T1 (en) 1980-10-15 1981-10-12 LADLE TOWER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3038876 1980-10-15
DE3038876A DE3038876C2 (en) 1980-10-15 1980-10-15 Ladle turret

Publications (3)

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EP0049890A2 true EP0049890A2 (en) 1982-04-21
EP0049890A3 EP0049890A3 (en) 1982-05-12
EP0049890B1 EP0049890B1 (en) 1984-06-27

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EP81108224A Expired EP0049890B1 (en) 1980-10-15 1981-10-12 Rotary ladle turret

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US (1) US4471487A (en)
EP (1) EP0049890B1 (en)
JP (1) JPS57168753A (en)
AT (1) ATE8115T1 (en)
DE (1) DE3038876C2 (en)
ES (1) ES506277A0 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4751956A (en) * 1985-10-04 1988-06-21 Danieli & C. Officine Meccaniche Spa Device to handle ladles
US4898227A (en) * 1986-09-25 1990-02-06 Danieli & C. Officine Meccaniche Spa Plant to convert a metallic charge into semifinished products

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1295559B1 (en) * 1997-05-23 1999-05-13 Danieli Off Mecc LOADING SYSTEM FOR ELECTRIC ARC OVENS
ES2281384T3 (en) * 2000-02-17 2007-10-01 John A. Vallomy METHOD FOR PROCESSING REDUCING THE LIQUID ESCORIA AND THE DUST OF THE FILTER CHAMBER OF THE ELECTRIC ARC OVEN.

Citations (4)

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Publication number Priority date Publication date Assignee Title
AT267099B (en) * 1967-02-06 1968-12-10 Voest Ag Plant for the continuous casting of metals
DE2135289A1 (en) * 1970-08-03 1972-03-09
DE2044979B2 (en) * 1970-09-11 1977-12-22 Schloemann-Siemag AG, 4000 Düsseldorf ROTATING TOWER FOR POURS
DE2744311A1 (en) * 1976-10-04 1978-04-06 Siderurgie Fse Inst Rech INDUCTIONALLY HEATED WATER PAN

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US1318164A (en) * 1919-10-07 John mcconnell
CH375107A (en) * 1958-09-10 1964-02-15 Beteiligungs & Patentverw Gmbh Device for casting metals
FR1309692A (en) * 1962-01-05 1962-11-16 Lloyds Burton Ltd Arrangement for heating ladles and other hollow bodies
US3894576A (en) * 1974-01-02 1975-07-15 Allis Chalmers Continuous casting apparatus with movable ladles and tundishes
AT340625B (en) * 1976-03-26 1977-12-27 Voest Ag LADLE TURNTOWER ON A CONTINUOUS CASTING PLANT
DE2916042C3 (en) * 1979-04-20 1988-09-29 Mannesmann AG, 4000 Düsseldorf Rotating tower for two independently raising and lowering ladles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT267099B (en) * 1967-02-06 1968-12-10 Voest Ag Plant for the continuous casting of metals
DE2135289A1 (en) * 1970-08-03 1972-03-09
DE2044979B2 (en) * 1970-09-11 1977-12-22 Schloemann-Siemag AG, 4000 Düsseldorf ROTATING TOWER FOR POURS
DE2744311A1 (en) * 1976-10-04 1978-04-06 Siderurgie Fse Inst Rech INDUCTIONALLY HEATED WATER PAN

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4751956A (en) * 1985-10-04 1988-06-21 Danieli & C. Officine Meccaniche Spa Device to handle ladles
US4898227A (en) * 1986-09-25 1990-02-06 Danieli & C. Officine Meccaniche Spa Plant to convert a metallic charge into semifinished products

Also Published As

Publication number Publication date
JPS6323871B2 (en) 1988-05-18
ES8206231A1 (en) 1982-09-01
DE3038876C2 (en) 1985-02-21
ATE8115T1 (en) 1984-07-15
ES506277A0 (en) 1982-09-01
EP0049890A3 (en) 1982-05-12
US4471487A (en) 1984-09-11
JPS57168753A (en) 1982-10-18
EP0049890B1 (en) 1984-06-27
DE3038876A1 (en) 1982-05-06

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