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EP0814926B1 - Floor lead-through element for an inversion casting vessel - Google Patents

Floor lead-through element for an inversion casting vessel Download PDF

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Publication number
EP0814926B1
EP0814926B1 EP96903878A EP96903878A EP0814926B1 EP 0814926 B1 EP0814926 B1 EP 0814926B1 EP 96903878 A EP96903878 A EP 96903878A EP 96903878 A EP96903878 A EP 96903878A EP 0814926 B1 EP0814926 B1 EP 0814926B1
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EP
European Patent Office
Prior art keywords
melt
channel
strip
metal
vessel
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
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EP96903878A
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German (de)
French (fr)
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EP0814926A1 (en
Inventor
Tarek El Gammal
Peter Hamacher
Michael Vonderbank
Fritz-Peter Pleschiutschnigg
Ingo Von Hagen
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Vodafone GmbH
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Mannesmann AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/008—Continuous casting of metals, i.e. casting in indefinite lengths of clad ingots, i.e. the molten metal being cast against a continuous strip forming part of the cast product

Definitions

  • the invention relates to a method and an apparatus for producing thin Strands of metal, especially steel, in which a metal band through the bottom of a container filled with melt passed and after crystallization of the melt this is guided over drivable rollers arranged above the container.
  • This strip casting process is because the solidification runs from the inside out and not like in the usual continuous casting from the outside in, also inversion casting called.
  • WO-A-87 07 192 is a device for producing thin metal strands a vessel with a refractory lining is known, in the bottom of which a is provided for introducing a metal strip opening, this as slot-shaped channel is formed. To increase the overall thickness of the tape obtained, it can be pulled through the melt in several cycles.
  • Another device for producing thin metal strands is from DE-A-36 38 249 known. Here is between the channel wall and the tape to be coated certain distance maintained.
  • a method is known from US Pat. No. 4,479,530, but wire - here from above down - to pass through a melt and through the bottom outlet of a Lead melting vessel. Designed for the production of copper wire Process is proposed not only to design the floor outlet conically, but to let the melt escape together with the wire.
  • the aim of the invention is to find a method and a device mechanical damage to the strip when it enters the melting vessel to avoid uncontrolled tension conditions due to increased friction (Risk of tearing) and to prevent the melt from flowing out of the container prevent.
  • the melt pool is in the area of the mouth of the slit-shaped Inlet in the vessel cooled so intensely that there was a drop in temperature ententent to a two-phase melt / crystal area slightly above the Freezing point leads.
  • copper can also be selected as the material.
  • the copper can be provided with a protective layer.
  • metals chrome, nickel
  • oxides zirconium oxide
  • ceramics e.g. boron nitride
  • the cooling element on the to the vessel indicative wall covered with a layer of a refractory mass.
  • the slot-shaped channel can be low-maintenance and inexpensive be designed so that it is composed of two parts.
  • the inventors propose the cooling element to be provided with a cone opening towards the inside of the vessel.
  • a liquid is proposed as the cooling medium, but also gas.
  • This water is sucked up, so that it cannot be excluded Damage to the cooling elements to avoid damage.
  • cooling tubes are used which are meandering are led.
  • the coil used is designed in such a way that Coolant is first routed near the slot.
  • the heat dissipation from the molten metal in the area of the mouth of the channel is in Regulated depending on the melting bath temperature. If the This can melt through a heating device, for example through a Plasma torch can be set to the desired temperature.
  • FIG. 1 shows a melting vessel with the vessel bottom 11 and the Vessel side walls 12, the metallic vessel jacket 13 and a refractory Have liner 14.
  • the bottom has a channel 20, the mouth of which faces the melt S has a metallic channel part 22, here designed as a cooler 25.
  • the cooling box 25 is via a media feed 31 and a container 34 or a media discharge 32 is connected to a pump 33.
  • a band B is guided through the channel 20 by guide rollers 41 to the melt S in passed the container.
  • a layer K crystallizes on band B, which lies above the Vessel is promoted by smoothing rollers 42 and smoothed close to the final dimensions.
  • a device 51 for measuring and controlling the Thermal energy connected.
  • FIG. 2 shows horizontal sections through the metallic channel part 22, which is shown here as Cooling tube 26 is formed, which on the feed 31 and the discharge 32nd connected. This is in the center of the meandering cooling tubes 26 Band B passed through the slot 20.
  • tubes with a circular profile can be used come, as well as square tubes.
  • FIG. 3 shows a section of the vessel with the metallic vessel jacket 13 and the refractory lining 14, in the right part as ramming mass and in left part as a stone.
  • the channel 20 has an elevation which is inclined towards the metallic vessel jacket 13 on a refractory channel part 21, specifically in the left half of the picture as a refractory stone 23 and in the right picture as a refractory ramming compound 24.
  • a metallic channel part 22 is inclined towards the melt, which is designed as a cooling tube 26 in the left half of the figure and as a cooling box 25 in the right half of the figure. In the direction of the interior of the vessel, this channel part 22 is covered with a refractory layer 15.
  • the channel 20 has an inner channel thickness D through which the band B with the Band thickness d is guided.
  • melt temperature T SOL isotherms are shown up to the melt temperature T SOL .
  • a meniscus M is formed between the belt B and the cooling box 25 under the cooling tube 26.
  • the shape of the meniscus is formed, with the conical end face projecting deeper into the slot-shaped channel 20.
  • the melt S itself has not yet solidified but is still ductile but firm enough to prevent the melt from escaping from the channel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Building Environments (AREA)
  • Coating With Molten Metal (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Secondary Cells (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

PCT No. PCT/DE96/00256 Sec. 371 Date Oct. 14, 1997 Sec. 102(e) Date Oct. 14, 1997 PCT Filed Feb. 7, 1996 PCT Pub. No. WO96/27465 PCT Pub. Date Sep. 12, 1996An inversion casting vessel includes a melt-filled container with a hole in the floor through which a metal strip is drawn. As the strip is drawn through the container, crystallization of the melt on the metal strip occurs, thereby forming a metal strand. The hole in the floor is a slit shaped channel through which the strip is run in a low-contact manner. The container also includes a cooling device for cooling the melt in the area of the slit shaped channel. The cooling device maintains the temperature of the melt around the channel to create a two-phase field of the melt, one of the phases being crystal, making up 50%-90% of the two phase field. The metal strip first contacts the melt at the two-phase field of the melt as the strip is run through the melt container.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Erzeugen von dünnen Metallsträngen, insbesondere Stahl, bei dem ein Metallband durch den Boden eines mit Schmelze gefüllten Behälters geleitet und nach Ankristallisierung von Schmelze an dieses über antreibbare oberhalb des Behälters angeordnete Rollen geführt wird.The invention relates to a method and an apparatus for producing thin Strands of metal, especially steel, in which a metal band through the bottom of a container filled with melt passed and after crystallization of the melt this is guided over drivable rollers arranged above the container.

Dieses Bandgießverfahren wird, da die Erstarrung von innen nach außen verläuft und nicht wie beim üblichen Stranggießen von außen nach innen, auch Inversionsgießen genannt.This strip casting process is because the solidification runs from the inside out and not like in the usual continuous casting from the outside in, also inversion casting called.

Ein solches Verfahren ist insbesondere bei der Herstellung von Draht, aber auch zum Gießen von Bändern bekannt. So zeigt für das Bandgießen das Patent US 3,264,692 ein Gießgefäß zur Durchführung dieses Verfahrens mit einem Bodenstein aus Zirkon. Die schlitzförmige Öffnung des Bodensteins ist sehr eng toleriert zu den Abmessungen des hier durchgezogenen Bandes.Such a method is particularly useful in the manufacture of wire, but also for Casting tapes known. The patent US 3,264,692 shows for strip casting a pouring vessel to carry out this process with a zircon floor stone. The slot-shaped opening of the floor stone is very closely tolerated to the dimensions of the solid ribbon here.

Nachteil dieses bekannten Bodeneinlaßes ist die relativ hohe Gefahr des Verklemmens des Bandes bei nur geringen Abweichungen der zugelassenen Bandabmessungen, bzw. unruhigen Verlauf des Bandes und die dadurch bedingte erhöhte Reibung. The disadvantage of this known floor inlet is the relatively high risk of Jamming of the band with only slight deviations from the permitted Band dimensions, or restless course of the band and the resulting increased friction.

Aus der WO-A- 87 07 192 ist eine Vorrichtung zur Erzeugung dünner Metallstränge mit einem, mit einer Feuerfestauskleidung versehenen Gefäß bekannt, in dessen Boden eine zum Hineinleiten eines metallbandes versehene Öffnung vorhanden ist, wobei diese als schlitzförmiger Kanal ausgebildet ist. Um eine größere Gesamtdicke des Bandes zu erhalten, kann dieses in mehreren Zyklen durch die Schmelze gezogen werden.From WO-A-87 07 192 is a device for producing thin metal strands a vessel with a refractory lining is known, in the bottom of which a is provided for introducing a metal strip opening, this as slot-shaped channel is formed. To increase the overall thickness of the tape obtained, it can be pulled through the melt in several cycles.

Eine weitere Vorrichtung zur Erzeugung dünner Metallstränge ist aus der DE-A- 36 38 249 bekannt. Hierbei wird zwischen der Kanalwand und dem zu beschichtenden Band ein gewisser Abstand eingehalten.Another device for producing thin metal strands is from DE-A-36 38 249 known. Here is between the channel wall and the tape to be coated certain distance maintained.

Schließlich sei noch die US 3264692 erwähnt. Bei der dort beschriebenen Vorrichtung wird für den Einlaßkanal ein bestimmtes Material verwendet. Damit soll erreicht werden, daß eine Ausdehnung des Materials nicht dazu führt, daß das Metallband im Kanal festgesetzt wird. Finally, US 3264692 should be mentioned. In the device described there a certain material is used for the inlet duct. This is to ensure that a Expansion of the material does not cause the metal band to become stuck in the channel.

Aus dem Patent US 4,479,530 ist ein Verfahren bekannt, Draht - hier jedoch von oben nach unten - durch eine Schmelze zu leiten und durch den Bodenauslaß eines Schmelzgefäßes zu führen. Bei diesem zur Herstellung von Kupferdraht konzipierten Verfahren wird vorgeschlagen, den Bodenauslaß nicht nur konisch auszugestalten, sondern gezielt Schmelze gemeinsam mit dem Draht austreten zu lassen.A method is known from US Pat. No. 4,479,530, but wire - here from above down - to pass through a melt and through the bottom outlet of a Lead melting vessel. Designed for the production of copper wire Process is proposed not only to design the floor outlet conically, but to let the melt escape together with the wire.

Eine ahnliche Vorrichtung, ebenfalls für die Drahtherstellung, ist aus dem Journal of Metals, October 1963. A Continuous Casting Process, Seite 774 bis 780 bekannt. In diesem Artikel wird ein Bodendurchlaß beschrieben, der aus Molybdän besteht und mit Wasser kühlbar ist.A similar device, also for wire production, is from the Journal of Metals, October 1963. A Continuous Casting Process, pages 774-780. In This article describes a floor outlet made of molybdenum and with Water is coolable.

Die beiden letztgenannten Schritten betreffen die Herstellung von Draht aus Kupfer und sind auf Verfahren und Vorrichtungen zur Herstellung von Bändern aus Stahl nicht übertragbar. Insbesondere bei der Drahtherstellung kommt hinzu, daß der Durchmesser des Drahtes infolge von Beuligkeit der aufkristallisierten Schicht ungleichmäßig ist und für eine praktische Anwendbarkeit nachbearbeitet wird. Weiterhin ist es ungünstig, daß sich aufgrund der großen Dicke des Mutterdrahtes - üblich sind hier 6 mm und großer - eine geringe Aufkristallisation und ein schlechtes Verschweißen ergibt.The latter two steps concern the manufacture of wire from copper and are not on methods and devices for making steel strips transferable. In addition, in wire production, in addition, the Diameter of the wire due to buckling of the crystallized layer is uneven and is reworked for practicality. Furthermore, it is unfavorable that due to the large thickness of the mother wire - 6 mm and larger are common here - low crystallization and poor Welding results.

Die Erfindung hat sich das Ziel gesetzt, ein Verfahren und eine Vorrichtung zu finden, eine mechanische Beschädigung des Bandes bei seinem Eintritt in das Schmelzgefäß zu vermeiden, unkontrollierte Zugspannungsverhältnisse durch verstärkte Reibung (Abrißgefahr) zu unterbinden und ein Ausfließen der Schmelze aus dem Behälter zu verhindern.The aim of the invention is to find a method and a device mechanical damage to the strip when it enters the melting vessel to avoid uncontrolled tension conditions due to increased friction (Risk of tearing) and to prevent the melt from flowing out of the container prevent.

Die Erfindung erreicht dieses Ziel durch die kennzeichnenden Merkmale des Verfahrensanspruches 1 und des Vorrichtungsanspruches 6,The invention achieves this goal by the characterizing features of Process claim 1 and device claim 6,

Erfindungsgemaß wird das Schmelzbad im Bereich des Mündung der schlitzförmigen Eintrittsöffnung in das Gefäß so intensiv gekühlt, daß hier eine Temperatursenke entstent, die zu einem Zwei-Phasen-Gebiet Schmelze/Kristall geringfügig oberhalb des Erstarrungspunktes führt. According to the invention, the melt pool is in the area of the mouth of the slit-shaped Inlet in the vessel cooled so intensely that there was a drop in temperature ententent to a two-phase melt / crystal area slightly above the Freezing point leads.

Dieses Zwei-Phasen-Gebiet, das darüber hinaus noch in Kontakt mit dem kalten Mutterband tritt, weist eine so hohe Viskosität auf, daß es die Funktion einer sich selbst erneuernden Dichtung übernimmt und ein Eindringen der Schmelze in den Spalt und den Bodendurchlaß verhindert.This two-phase area that is still in contact with the cold Mother tape occurs, has such a high viscosity that it has the function of itself self-renewing seal takes over and penetration of the melt into the gap and prevents the passage of soil.

Die Ausdehnung dieser als Dichtung wirkenden Schmelze ist so groß, daß der freie Raum zwischen der Innenwand des schlitzförmigen Kanals des Bodeneintritts zum durchgeführten Band in einer Größe gewählt werden kann, die ein berührungsfreies Durchleiten des Bandes durch den schlitzförmigen Kanal sicherstellt, nicht zuletzt durch den sich ausbildenden Meniskus.The expansion of this melt, which acts as a seal, is so large that the free one Space between the inner wall of the slot-shaped channel of the floor entry to the performed tape can be selected in a size that is non-contact Passing the tape through the slit-shaped channel ensures, not least through the developing meniscus.

Da nahezu keine mechanische Berührung zwischen dem Band und dem Kanal auftritt, kann als Material auch Kupfer gewählt werden. Zum Schutze gegen abrasiven Verschleiß kann das Kupfer mit einer Schutzschicht versehen sein. Als Beschichtung werden Metalle (Chrom. Nickel) oder Oxide (Zirkonoxid) oder Keramik (z.B. Bornitrid) vorgeschlagen.Since there is almost no mechanical contact between the belt and the channel, copper can also be selected as the material. To protect against abrasive Wear, the copper can be provided with a protective layer. As a coating metals (chrome, nickel) or oxides (zirconium oxide) or ceramics (e.g. boron nitride) suggested.

In einer weiteren vorteilhaften Ausgestaltung wird das Kühlelement auf der zum Gefäß hinweisenden Wand mit einer Schicht aus einer feuerfesten Masse belegt. Auf diese Weise wird nicht nur ein höherer Schutz des Kühlelementes erreicht, mit dieser Maßnahme wird auch Einfluß auf das Temperaturniveau der mit einer Schüttung vergleichbaren kälteren Schmelze in der Nähe der Kühlelemente erreicht.In a further advantageous embodiment, the cooling element on the to the vessel indicative wall covered with a layer of a refractory mass. To this Not only is a higher protection of the cooling element achieved with this Measure will also affect the temperature level of a bed comparable colder melt near the cooling elements.

Der schlitzförmige Kanal kann dabei in wartungsarmer und kostengünstiger Weise derart ausgestaltet werden, daß er aus zwei Teilen aufgebaut ist. Der eine Teil besteht dabei wie beschrieben aus Kupfer und der von der Schmelze wegweisende Teil ist dabei aus einer feuerfesten Masse bzw. aus feuerfesten Steinen aufgebaut.The slot-shaped channel can be low-maintenance and inexpensive be designed so that it is composed of two parts. One part exists as described, it is made of copper and is the part pointing away from the melt built up from a refractory mass or from refractory stones.

Zur sicheren Beeinflussung des Meniskus schlagen die Erfinder vor, das Kühlelement mit einem in Richtung Gefäßinneres sich öffnenden Konus zu versehen.To safely influence the meniscus, the inventors propose the cooling element to be provided with a cone opening towards the inside of the vessel.

Als Kühlmedium wird eine Flüssigkeit vorgeschlagen, aber auch Gas. Bei Einsatz von Wasser wird dieses saugend gefördert, um bei nicht auszuschließenden Beschädigungen der Kühlelemente Schäden zu vermeiden. A liquid is proposed as the cooling medium, but also gas. When using This water is sucked up, so that it cannot be excluded Damage to the cooling elements to avoid damage.

In einer besonderen Ausgestaltung werden Kühlrohre eingesetzt, die meanderförmig geführt sind. Die eingesetzte Rohrschlange ist in der Weise ausgestaltet, daß das Kühlmittel zuerst in der Nähe des Schlitzes entlanggeführt wird. Die Wärmeabfuhr aus der Metallschmelze im Bereich der Mündung des Kanals wird in Abhängigkeit von der Schmelzbadtemperatur geregelt. Bei zu starker Abkühlung der Schmelze kann diese durch eine Aufheizvorrichtung, beispielsweise durch einen Plasmabrenner auf die gewünschte Temperatur eingestellt werden.In a special embodiment, cooling tubes are used which are meandering are led. The coil used is designed in such a way that Coolant is first routed near the slot. The heat dissipation from the molten metal in the area of the mouth of the channel is in Regulated depending on the melting bath temperature. If the This can melt through a heating device, for example through a Plasma torch can be set to the desired temperature.

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

Figur 1
Einen schematischen Schnitt durch die Gießeinrichtung.
Figur 2
Die Anordnung der Kühlschlange.
Figur 3
Ausschnitt der Bodeneintrittsöffnung.
An example of the invention is set out in the accompanying drawing. The shows
Figure 1
A schematic section through the pouring device.
Figure 2
The arrangement of the cooling coil.
Figure 3
Section of the floor entry opening.

Die Figur 1 zeigt ein Schmelzgefäß mit dem Gefäßboden 11 und den Gefäßseitenwänden 12, die einen metallischen Gefäßmantel 13 sowie eine feuerfeste Auskleidung 14 aufweisen.FIG. 1 shows a melting vessel with the vessel bottom 11 and the Vessel side walls 12, the metallic vessel jacket 13 and a refractory Have liner 14.

Der Boden weist einen Kanal 20 auf, dessen der Schmeize S zugewandte Mündung einen metallischen Kanalteil 22 besitzt, hier als Kühlkasten 25 ausgestaltet.The bottom has a channel 20, the mouth of which faces the melt S has a metallic channel part 22, here designed as a cooler 25.

Der Kühlkasten 25 ist über eine Medienzufuhr 31 und einem Behälter 34 bzw. über eine Medienabfuhr 32 mit einer Pumpe 33 verbunden.The cooling box 25 is via a media feed 31 and a container 34 or a media discharge 32 is connected to a pump 33.

Durch den Kanal 20 wird von Führungsrollen 41 geführt ein Band B zur Schmelze S in den Behälter geleitet. Am Band B kristallisiert sich eine Schicht K an, die oberhalb des Gefäßes durch Glättrollen 42 gefördert und endabmessungsnah geglättet wird.A band B is guided through the channel 20 by guide rollers 41 to the melt S in passed the container. A layer K crystallizes on band B, which lies above the Vessel is promoted by smoothing rollers 42 and smoothed close to the final dimensions.

An die Medienabfuhr 32 ist eine Einrichtung 51 zum Messen und Regeln der Wärmeenergie angeschlossen.A device 51 for measuring and controlling the Thermal energy connected.

Die Figur 2 zeigt Horizontalschnitte durch den metallischen Kanalteil 22, der hier als Kühlrohr 26 ausgebildet ist, welches an die Zufuhr 31 und die Abfuhr 32 angeschlossen ist. Im Zentrum der meanderförmig geführten Kühlrohre 26 wird das Band B durch den Schlitz 20 geführt. FIG. 2 shows horizontal sections through the metallic channel part 22, which is shown here as Cooling tube 26 is formed, which on the feed 31 and the discharge 32nd connected. This is in the center of the meandering cooling tubes 26 Band B passed through the slot 20.

Im oberen Teil des Bildes ist eine Anordnung dargestellt, bei der zu beiden Seiten des Bandes jeweils zwei Rohre sich befinden. Die Pfeile deuten die Fließrichtung des Kühlmediums an. Es zeigt sich, daß das Kühlmedium zuerst um das Band herumgeführt wird, um anschließend parallel zur Kühlrohrschlange im Bereich des Bandes der Kühlmediumabfuhr zugeführt zu werden.In the upper part of the picture, an arrangement is shown in which the Band there are two pipes each. The arrows indicate the flow direction of the Coolant. It turns out that the cooling medium is first around the belt is led around to then parallel to the cooling coil in the area of Band of coolant discharge to be fed.

Im unteren Teil des Bildes sind insgesamt drei Rohre parallel nebeneinander angeordnet. In der Skizze ist dargestellt, daß das Kühlrohr in Nähe des Bandes abgeschrägt sein kann und zwar in der Weise, daß sich der Schlitz 20 konisch in Richtung Gefäßinneres öffnet.In the lower part of the picture there are a total of three tubes parallel to each other arranged. The sketch shows that the cooling pipe is close to the belt can be beveled in such a way that the slot 20 is conical in Opens towards the inside of the vessel.

Wie in der Skizze dargestellt, können Rohre mit kreisrundem Profil zum Einsatz kommen, wie auch Vierkantrohre.As shown in the sketch, tubes with a circular profile can be used come, as well as square tubes.

Die Figur 3 zeigt einen Ausschnitt des Gefäßes mit dem metallischen Gefäßmantel 13 und der Feuerfestauskleidung 14, und zwar im rechten Teil als Stampfmasse und im linken Teil als Stein.FIG. 3 shows a section of the vessel with the metallic vessel jacket 13 and the refractory lining 14, in the right part as ramming mass and in left part as a stone.

Der Kanal 20 weist eine Erhöhung auf, die dem metallischen Gefäßmantel 13 zugeneigt auf ein Feuerfestkanalteil 21 aufsetzt, und zwar in der linken Bildhälfte als feuerfester Stein 23 und in der rechten Bildhältte als feuerfeste Stampfmasse 24 ausgebildet.
Der Schmelze zugeneigt ist ein metallischer Kanalteil 22, der in der linken Bildhälfte als Kühlrohr 26 in der rechten Bildhälfte als Kühlkasten 25 ausgestaltet ist. In Richtung Gefäßinneres ist dieser Kanalteil 22 mit einer Feuerfestschicht 15 belegt.The channel 20 has an elevation which is inclined towards the metallic vessel jacket 13 on a refractory channel part 21, specifically in the left half of the picture as a refractory stone 23 and in the right picture as a refractory ramming compound 24.
A metallic channel part 22 is inclined towards the melt, which is designed as a cooling tube 26 in the left half of the figure and as a cooling box 25 in the right half of the figure. In the direction of the interior of the vessel, this channel part 22 is covered with a refractory layer 15.

Der Kanal 20 besitzt eine innere Kanaldicke D, durch die das Band B mit der Banddicke d geführt ist.The channel 20 has an inner channel thickness D through which the band B with the Band thickness d is guided.

In Bandrichtung kristallisiert an das durch die Schmelze S geführte B and B eine Schicht K an.One crystallizes in the direction of the band at the B and B passed through the melt S. Layer K on.

Weiterhin sind in der Figur 3 Isotherme der Schmelze S aufgeführt. Es zeigt sich, daß im schlitzförmigen Kanal im Bereich des metallischen Kanalteils 22 sich eine Temperatursenke nahe dem Erstartungspunkt TSOL einstellt. Dieses Zwei-Phasen-Gebiet Schmelze/Kristall verhindert ein Auslaufen der Schmelze durch den schlitzförmigen Kanal aus dem Schmelzgefäß heraus.3 isotherms of the melt S are also shown. It can be seen that a temperature drop occurs in the slot-shaped channel in the area of the metallic channel part 22 near the starting point T SOL . This two-phase melt / crystal area prevents the melt from escaping through the slot-shaped channel out of the melting vessel.

Vom Zwei-Phasen-Gebiet ausgehend sind weitere Isothermen dargestellt bis hin zur Schmelzentemperatur TSOL. Im Bereich des Schlitzes bildet sich zwischen dem Band B und dem Kühlkasten 25 unter dem Kühlrohr 26 ein Meniskus M aus.
In Abhängigkeit der Form der Stirnfläche des metallischen Kanalteils 22 bildet sich der Meniskus in seiner Form aus, wobei er bei der konisch ausgebildeten Stirnfläche tiefer in den schlitzförmigen Kanal 20 hineinragt. Die Schmelze S ist dabei selber noch nicht durcherstarrt sondern noch duktil aber soweit fest, daß ein Auströmen der Schmelze aus dem Kanal verhindert wird. Starting from the two-phase area, further isotherms are shown up to the melt temperature T SOL . In the area of the slot, a meniscus M is formed between the belt B and the cooling box 25 under the cooling tube 26.
Depending on the shape of the end face of the metallic channel part 22, the shape of the meniscus is formed, with the conical end face projecting deeper into the slot-shaped channel 20. The melt S itself has not yet solidified but is still ductile but firm enough to prevent the melt from escaping from the channel.

PositionslistePosition list Gefäßvessel

1111
GefäßbodenVessel bottom
1212th
GefäßseitenwändeVessel side walls
1313
Metallischer GefäßmantelMetallic tube jacket
1414
FeuerfestauskleidungRefractory lining
1515
FeuerfestschichtRefractory layer
2020th
Kanalchannel
2121
Feuerfester KanalteilRefractory duct part
2222
Metallischer KanalteilMetallic channel part
2323
Steinstone
2424th
StampfmasseRamming mass
2525th
KühlkastenCool box
2626
KühlrohrCooling pipe
KühleinrichtungCooling device

3131
MedienzufuhrMedia feed
3232
MedienabfuhrMedia removal
3333
Pumpepump
3434
Behältercontainer
BandfördereinrichfungBelt conveyor device

4141
FührungsrolleLeadership role
4242
GlättrolleSmoothing roll
Meß- und RegeleinrichtungMeasuring and control device

5151
WärmeenergieThermal energy
SS
Schmelzemelt
BB
Bandtape
KK
Ankristallisierte SchichtCrystallized layer
dd
BanddickeTape thickness
DD
KanalinnendickeInner channel thickness
MM
Meniskusmeniscus

Claims (12)

  1. A method for producing thin metal billets, in particular steel, in which a metal strip is passed through the bottom of a container filled with melt and once melt has crystallised on thereto is withdrawn by means of drivable rollers arranged above the container, characterised by the following steps:
    a) the metal strip is guided with low contact through a slot-shaped channel towards the interior of the container,
    b) the metal melt is cooled in the region of the mouth of the channel to such a temperature that a crystal proportion of between 50 and 90% is present in a two-phase region,
    c) the metal strip contacts this cool quantity of melt in the region of the mouth of the channel, in so doing forms a meniscus and cools the melt in the immediate vicinity of the meniscus in a two-phase region consisting of melt and crystal at a temperature closely above the solidus point.
  2. A method according to Claim 1, characterised in that the speed of the strip is selected such that the meniscus is located in the region of the mouth of the channel.
  3. A method according to Claim 1 or 2, characterised in that the dissipation of heat is controlled by a cooling medium dependent on the speed of the strip.
  4. A method according to Claim 3, characterised in that the cooling medium is a gas.
  5. A method according to one of the preceding claims, characterised in that the dissipation of heat is controlled dependent on the melt bath temperature.
  6. An apparatus for producing thin metal billets with a vessel which is provided in a refractory lining and can be filled with a melt, in the base of which vessel there is an opening provided for introducing a metal strip, for performing the method according to Claim 1, characterised in that the opening (20) is in the form of a slot-shaped channel, the inner wall of which is at a distance from the surface of the metal strip (B) of 0.3 to 1.0 mm, and that a metal channel part (22) is provided as cooling element on the mouth of the channel (20) which faces the melt (S).
  7. An apparatus according to Claim 6, characterised in that the cooling element (22) is made of steel.
  8. An apparatus according to Claim 6, characterised in that the cooling element (22) is made of copper which is provided with a layer (27) to protect against abrasive wear.
  9. An apparatus according to Claim 8, characterised in that the cooling element (22) is connected via media supply means (31) and media removal means (32) to a conveying station (33) with which cooling water can be moved by suction.
  10. An apparatus according to Claim 8, characterised in that the cooling element (22) has a conical shape which opens towards the interior of the vessel.
  11. An apparatus according to Claim 10, characterised in that the cooling element is covered with a layer of a refractory compound (15) on the wall facing towards the interior of the vessel.
  12. An apparatus according to one of the preceding claims, characterised in that a means (51) is provided for measuring and controlling the dissipation and supply of heat from the metal channel part (22).
EP96903878A 1995-03-08 1996-02-07 Floor lead-through element for an inversion casting vessel Expired - Lifetime EP0814926B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19509691A DE19509691C1 (en) 1995-03-08 1995-03-08 Inverted continuous casting process for thin strip mfr.
DE19509691 1995-03-08
PCT/DE1996/000256 WO1996027465A1 (en) 1995-03-08 1996-02-07 Floor lead-through element for an inversion casting vessel

Publications (2)

Publication Number Publication Date
EP0814926A1 EP0814926A1 (en) 1998-01-07
EP0814926B1 true EP0814926B1 (en) 1999-04-21

Family

ID=7756941

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96903878A Expired - Lifetime EP0814926B1 (en) 1995-03-08 1996-02-07 Floor lead-through element for an inversion casting vessel

Country Status (10)

Country Link
US (1) US5992501A (en)
EP (1) EP0814926B1 (en)
JP (1) JP3009738B2 (en)
KR (1) KR100264947B1 (en)
CN (1) CN1176612A (en)
AT (1) ATE179102T1 (en)
AU (1) AU4782696A (en)
DE (2) DE19509691C1 (en)
RU (1) RU2145531C1 (en)
WO (1) WO1996027465A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19638906C1 (en) * 1996-09-23 1998-01-02 Schloemann Siemag Ag Production of continuous coated metal products, in particular metal strips
DE19638905C1 (en) * 1996-09-23 1998-01-02 Schloemann Siemag Ag Production of continuous coated metal products, in particular, metal strips
US6037011A (en) * 1997-11-04 2000-03-14 Inland Steel Company Hot dip coating employing a plug of chilled coating metal
DE19813528A1 (en) * 1998-03-26 1999-10-07 Siemens Sa Device for treating plate-shaped workpieces, in particular printed circuit boards
FR2799767A1 (en) * 1999-10-13 2001-04-20 Lorraine Laminage Device for the wet coating of metal strip by defilement through a coating metal in the liquid state with controlled heat exchangers to help prevent the strip making contact with the walls of the coating device
US7695882B2 (en) * 2007-02-01 2010-04-13 Lexmark International, Inc. Toner formulation for controlling mass flow
CN104778374A (en) * 2015-05-04 2015-07-15 哈尔滨理工大学 Automatic dietary estimation device based on image processing and recognizing method
DE102017124144A1 (en) * 2017-10-17 2019-04-18 Mkm Mansfelder Kupfer Und Messing Gmbh Method for producing a copper profile and copper profile

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2128943A (en) * 1936-04-01 1938-09-06 American Rolling Mill Co Formation of encased structures by direct casting
US3264692A (en) * 1964-04-29 1966-08-09 Gen Electric Inlet orifice for continuous casting apparatus
US3470939A (en) * 1965-11-08 1969-10-07 Texas Instruments Inc Continuous chill casting of cladding on a continuous support
US3995587A (en) * 1973-06-28 1976-12-07 General Electric Company Continuous casting apparatus including Mo-Ti-Zr alloy bushing
JPS56151163A (en) * 1980-04-22 1981-11-24 Mitsubishi Electric Corp Dip forming device
SE427090B (en) * 1980-05-08 1983-03-07 Ekerot Sven Torbjoern PROCEDURE AND DEVICE TO MEDIUM DIRECT CASTING OF A METAL MELF MAKING METALLIC STRAIGHT PRODUCTS
JPS5797862A (en) * 1980-12-08 1982-06-17 Mitsubishi Electric Corp Producing device for rough drawn wire
JPS62112767A (en) * 1985-11-12 1987-05-23 Fujikura Ltd Dip coating forming device
DE3690741D2 (en) * 1986-05-27 1989-08-17 Mannesmann Ag Process and device for producing thin metal bar

Also Published As

Publication number Publication date
RU2145531C1 (en) 2000-02-20
AU4782696A (en) 1996-09-23
ATE179102T1 (en) 1999-05-15
JPH10511314A (en) 1998-11-04
JP3009738B2 (en) 2000-02-14
EP0814926A1 (en) 1998-01-07
KR100264947B1 (en) 2000-09-01
US5992501A (en) 1999-11-30
WO1996027465A1 (en) 1996-09-12
KR19980702647A (en) 1998-08-05
DE59601713D1 (en) 1999-05-27
DE19509691C1 (en) 1996-05-09
CN1176612A (en) 1998-03-18

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