EP0197135B1 - Bar casting device - Google Patents

Bar casting device Download PDF

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Publication number
EP0197135B1
EP0197135B1 EP85905318A EP85905318A EP0197135B1 EP 0197135 B1 EP0197135 B1 EP 0197135B1 EP 85905318 A EP85905318 A EP 85905318A EP 85905318 A EP85905318 A EP 85905318A EP 0197135 B1 EP0197135 B1 EP 0197135B1
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EP
European Patent Office
Prior art keywords
chain
casting wheel
recess
band
casting
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
EP85905318A
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German (de)
French (fr)
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EP0197135A1 (en
Inventor
Siegfried Henders
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.)
Deutsche Voest Alpine Industrieanlagenbau GmbH
Original Assignee
Deutsche Voest Alpine Industrieanlagenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Deutsche Voest Alpine Industrieanlagenbau GmbH filed Critical Deutsche Voest Alpine Industrieanlagenbau GmbH
Priority to AT85905318T priority Critical patent/ATE59798T1/en
Publication of EP0197135A1 publication Critical patent/EP0197135A1/en
Application granted granted Critical
Publication of EP0197135B1 publication Critical patent/EP0197135B1/en
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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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0602—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a casting wheel and belt, e.g. Properzi-process

Definitions

  • the invention relates to a continuous casting device, in which molten material is guided into a recess on the outer circumference of a casting wheel, which extends in the circumferential direction and is open in the radial direction, and at least partially solidifies in the latter during the rotational movement of the casting wheel before the strand thus formed is led out of the recess is, with a, in the circumferential direction at least partially closing the portion of the recess filled with the material, pressed against the casting wheel and at least one seen from the casting wheel behind the belt, this pressing against the casting wheel, separate pressing element in the form of a rotating chain.
  • a continuous casting device in which molten material is guided into a recess on the outer circumference of a casting wheel, which extends in the circumferential direction and is open in the radial direction, and at least partially solidifies in the latter during the rotational movement of the casting wheel before the strand thus formed is led out of the recess is, with a, in the circumferential direction at least partially closing the portion
  • the belt consists of an endless steel belt guided over three deflection rollers.
  • One of these three deflection rollers is movably mounted and subjected to a force in such a way that a certain tensile stress prevails in the steel strip.
  • This tensile stress is necessary in order to maintain a certain contact pressure of the steel strip against the casting wheel.
  • This tensile load alone means that the contact pressure cannot be reached at the high temperatures of the molten material, at which the steel strip is subjected to considerable stresses. Therefore, a separate pressure element in the form of a revolving chain is provided in this device.
  • the system shown allows continuous continuous casting and, for example in conjunction with a connected rolling mill, enables the finished product such as steel bars, light profiles or wire rod to be produced from the melting heat of the liquid steel without interruption and without additional heat input.
  • This continuous operation of a casting plant connected to a rolling mill thus leads to considerable cost savings.
  • the system according to FIG. 1 is fed into a recess 4 of a casting wheel 5 via a tundish, not shown, of liquid steel by means of a nozzle.
  • the recess 4 runs in the circumferential direction of the casting wheel 5 and represents a self-contained groove. It has a trapezoidal shape, that is to say in the radial direction its inner surface is somewhat narrower than the outer surface.
  • the inner surface has a length of 130 mm in the axial direction of the casting wheel 5, for example, and the outer surface has a length of 160 mm, while the depth of the recess 4 is 128 mm, for example.
  • the recess 4 is open to the outside in the radial direction.
  • the casting wheel 5 is preferably made of a steel frame and a water-cooled copper ring containing the recess 4.
  • the open side of the recess 4 is closed, at least in the area of the still liquid steel filling, by a moving band 6, for example a steel band.
  • This steel belt runs along with it over a length of approximately a quarter of the circumference of the casting wheel 5 and consists of an endless belt guided over three deflection rollers 7, 8 and 9. The storage of these deflection rollers 7 to 9 takes place in such a way that the belt 6 is not exposed to any significant tensile stresses.
  • An endless chain 11 runs over the deflection rollers 8 and 9 and a further deflection roller 10 such that the belt 6 is located in the section between the deflection rollers 8 and 9 between the casting wheel 5 and the chain 11.
  • the deflection roller 10 is movably mounted, a force acting on this deflection roller 10 in order to maintain a predetermined tension in the chain 11. This tension in the chain 11 ensures that the belt 6 is pressed firmly against the casting wheel 5, so that the recess 4 is tightly closed to the outside and the liquid steel located therein cannot escape.
  • each chain link has outer webs 12, which press the band 6 firmly against the casting wheel 5 at the edges of the recess 4.
  • the webs 12 are connected to one another by a bridge element 13. This is guided at a distance over the steel band 6 so that it is not itself exposed to any radial contact pressure via the recess 4.
  • the webs 12 of the individual chain links adjoin one another directly, so that they form a continuous pressure line on both sides of the belt 6.
  • the steel in the recess 4 solidifies during the rotation of the casting wheel 5 between the two deflection rollers 8 and 9 to such an extent that a solid shell is formed.
  • This partially solidified strand is released from the recess 4 by a water-cooled scraper, not shown, and fed to a subsequent bending zone with a directional driver.
  • the casting wheel which continues to rotate, is cleaned by brushing, drying and sprayed with casting oil.
  • the strand is already cooled in the bending zone by open spray cooling, so that the residual liquid sump is solidified in a controlled manner. Here it is straightened by several rollers and finally straightened in the straightening driver.
  • the strand then passes through a so-called compensation zone in which additional cooling does not take place and heat compensation takes place in the strand.
  • this compensation zone At the end of this compensation zone, it therefore has a temperature field that is largely homogeneous across its cross section. It can then be inserted directly into a rolling mill.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Abstract

A bar casting device, based on the use of a casting wheel (5), whereby molten material is fed into an externally open recess which runs along the outer circumference of the casting wheel in its peripheral direction and radially to the wheel. During the rotary movement of the casting wheel the material partly solidifies, with the creation of a solid jacket in the recess. At least in the time up to the formation of the solid jacket, the recess is closed off by an endless steel band (6), pressed against the casting wheel, and fed over deflection rollers (7, 8 and 9). The force of application of the steel band is provided by a chain (11) which is arranged in the application region of the casting wheel, behind the steel band when seen from the casting wheel. This chain is subjected to a corresponding tensile force. For this, one (10) of the deflection rollers (8, 9, 10) for the chain is movably supported and subjected to a force which exerts a tensile force in the chain.

Description

Die Erfindung betrifft eine Stranggießvorrichtung, bei der geschmolzenes Material in eine am Außenumfang eines Gießrades in dessen Umfangsrichtung verlaufende, in Radialrichtung nach außen offene Aussparung geleitet wird und in dieser während der Drehbewegung des Gießrades zumindest teilweise erstarrt, bevor der so gebildete Strang aus der Aussparung herausgeführt wird, mit einem, in Umfangsrichtung mindestens teilweise den mit dem Material gefüllten Abschnitt der Aussparung verschließenden, gegen das Gießrad gedrückten Band und wenigstens einem vom Gießrad aus gesehen hinter dem Band, dieses gegen das Gießrad drückendes, gesondertes Andrückelement in Form einer umlaufenden Kette. Eine derartige Vorrichtung ist aus der US-PS 2 206 930 bekannt.The invention relates to a continuous casting device, in which molten material is guided into a recess on the outer circumference of a casting wheel, which extends in the circumferential direction and is open in the radial direction, and at least partially solidifies in the latter during the rotational movement of the casting wheel before the strand thus formed is led out of the recess is, with a, in the circumferential direction at least partially closing the portion of the recess filled with the material, pressed against the casting wheel and at least one seen from the casting wheel behind the belt, this pressing against the casting wheel, separate pressing element in the form of a rotating chain. Such a device is known from US Pat. No. 2,206,930.

Bei der bekannten Vorrichtung besteht das Band aus einem über drei Umlenkrollen geführten endlosen Stahlband. Eine dieser drei Umlenkrollen ist beweglich gelagert und einer Kraft in der Weise ausgesetzt, daß in dem Stahlband eine bestimmte Zugspannung herrscht.In the known device, the belt consists of an endless steel belt guided over three deflection rollers. One of these three deflection rollers is movably mounted and subjected to a force in such a way that a certain tensile stress prevails in the steel strip.

Diese Zugspannung ist erforderlich, um einen gewissen Anpreßdruck des Stahlbandes an das Gießrad zu erhalten. Durch diese Zugbelastung allein läßt sich bei den hohen Temperaturen des geschmolzenen Materials bei denen das Stahlband erheblichen Beanspruchungen ausgesetzt ist, der Anpreßdruck nicht erreichen. Deshalb ist bei dieser Vorrichtung noch ein gesondertes Andruckelement in Form einer umlaufenden Kette vorgesehen.This tensile stress is necessary in order to maintain a certain contact pressure of the steel strip against the casting wheel. This tensile load alone means that the contact pressure cannot be reached at the high temperatures of the molten material, at which the steel strip is subjected to considerable stresses. Therefore, a separate pressure element in the form of a revolving chain is provided in this device.

Desweiteren ist eine derartige Vorrichtung bekannt (FR-A-23 59 663), bei der das Band an den Rändern, d.h. außerhalb der das geschmolzene Material aufnehmenden Aussparung zusätzlich verstärkt ist, durch geeignete Auflageelemente, die das Band in der gewünschten Weise stabilisieren.Furthermore, such a device is known (FR-A-23 59 663), in which the tape at the edges, i.e. outside of the recess receiving the molten material is additionally reinforced by suitable support elements which stabilize the band in the desired manner.

Es ist Aufgabe der vorliegenden Erfindung, eine Stranggießvorrichtung der gattungsgemäßen Art zu schaffen, bei der insbesondere der Verschleiß des Bandes wesentlich herabgesetzt ist.It is an object of the present invention to provide a continuous casting device of the generic type in which, in particular, the wear on the strip is significantly reduced.

Diese Aufgabe wird erfindungemäß durch die im Kennzeichen des Anspruchs 1 angegebenen Merkmale gelöst.This object is achieved by the features specified in the characterizing part of claim 1.

Vorteilhafte Ausgestaltungen dieser Aufgabenlösung ergeben sich aus den Unteransprüchen.Advantageous embodiments of this task solution result from the subclaims.

Die Erfindung wird im folgenden anhand eines in den Figuren dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:

  • Fig. 1 ein Stranggießrad in prinzipieller Seitenansicht und
  • Fig. 2 einen Schnitt entlang der Linie A-A in Fig. 1 senkrecht zur Zeichenebene.
The invention is explained below with reference to an embodiment shown in the figures. Show it:
  • Fig. 1 shows a continuous casting wheel in principle side view
  • Fig. 2 shows a section along the line AA in Fig. 1 perpendicular to the plane of the drawing.

Die gezeigte Anlage erlaubt ein kontinuierliches Stranggießen und gibt beispielsweise in Verbindung mit einem angeschlossenen Walzwerk die Möglichkeit, aus der Schmelzhitze des flüssigen Stahls heraus ohne Unterbrechung und ohne zusätzliche Wärmezufuhr ein Fertigprodukt wie Stabstahl, leichte profile oder Walzdraht herzustellen. Dieser kontinuierliche Betrieb einer mit einem Walzwerk verbundenen Gießanlage führt somit zu erheblichen Kosteneinsparungen.The system shown allows continuous continuous casting and, for example in conjunction with a connected rolling mill, enables the finished product such as steel bars, light profiles or wire rod to be produced from the melting heat of the liquid steel without interruption and without additional heat input. This continuous operation of a casting plant connected to a rolling mill thus leads to considerable cost savings.

Der Anlage nach Fig. 1, wird über einen nicht dargestellten Tundish flüssiger Stahl mittels einer Düse in eine Aussparung 4 eines Gießrades 5 eingegeben. Die Aussparung 4 verläuft in Umfangsrichtung des Gießrades 5 und stellt eine in sich geschlossene Nut dar. Sie besitzt eine trapezoide Form, das heißt in radialer Richtung ist ihre Innenfläche etwas schmaler als die Außenfläche. Die Innenfläche hat beispielsweise in Achsrichtung des Gießrades 5 eine Länge von 130 mm und die Außenfläche eine Länge von 160 mm, während die Tiefe der Aussparung 4 zum Beispiel 128 mm beträgt. Die Aussparung 4 ist in radialer Richtung nach außen hin offen. Das Gießrad 5 ist vorzugsweise aus einem Stahlramen und einem wassergekühlten, die Aussparung 4 enthaltenden Kupferkranz gefertigt.The system according to FIG. 1 is fed into a recess 4 of a casting wheel 5 via a tundish, not shown, of liquid steel by means of a nozzle. The recess 4 runs in the circumferential direction of the casting wheel 5 and represents a self-contained groove. It has a trapezoidal shape, that is to say in the radial direction its inner surface is somewhat narrower than the outer surface. The inner surface has a length of 130 mm in the axial direction of the casting wheel 5, for example, and the outer surface has a length of 160 mm, while the depth of the recess 4 is 128 mm, for example. The recess 4 is open to the outside in the radial direction. The casting wheel 5 is preferably made of a steel frame and a water-cooled copper ring containing the recess 4.

Die offene Seite der Aussparung 4 wird zumindest im Bereich der noch flüssigen Stahlfüllung von einem mitlaufenden Band 6, etwa einem Stahlband verschlossen. Dieses Stahlband läuft über eine Länge von etwa einem Viertel des Umfangs des Gießrades 5 mit diesem mit und besteht aus einem über drei Umlenkrollen 7, 8 und 9 geführten Endlosband. Die Lagerung dieser Umlenkrollen 7 bis 9 erfolgt in der Weise, daß das Band 6 keinen wesentlichen Zugbeanspruchungen ausgesetzt ist.The open side of the recess 4 is closed, at least in the area of the still liquid steel filling, by a moving band 6, for example a steel band. This steel belt runs along with it over a length of approximately a quarter of the circumference of the casting wheel 5 and consists of an endless belt guided over three deflection rollers 7, 8 and 9. The storage of these deflection rollers 7 to 9 takes place in such a way that the belt 6 is not exposed to any significant tensile stresses.

Über die Umlenkrollen 8 und 9 sowie eine weitere Umlenkrolle 10 läuft eine endlose Kette 11, derart, daß sich das Band 6 in dem Abschnitt zwischen den Umlenkrollen 8 und 9 zwischen dem Gießrad 5 und der Kette 11 befindet. Die Umlenkrolle 10 ist beweglich gelagert, wobei eine Kraft auf diese Umlenkrolle 10 einwirkt, um eine vorgegebene Zugspannung in der Kette 11 zu erhalten. Durch diese Zugspannung in der Kette 11 wird erreicht, daß das Band 6 fest gegen das Gießrad 5 gedrückt wird, so daß die Aussparung 4 nach außen hin dicht verschlossen wird und der hierin befindliche flüssige Stahl nicht entweichen kann.An endless chain 11 runs over the deflection rollers 8 and 9 and a further deflection roller 10 such that the belt 6 is located in the section between the deflection rollers 8 and 9 between the casting wheel 5 and the chain 11. The deflection roller 10 is movably mounted, a force acting on this deflection roller 10 in order to maintain a predetermined tension in the chain 11. This tension in the chain 11 ensures that the belt 6 is pressed firmly against the casting wheel 5, so that the recess 4 is tightly closed to the outside and the liquid steel located therein cannot escape.

Die Ausbildung eines Gliedes der Kette 11 ist in Fig. 2 im Querschnitt dargestellt. Hiernach besitzt jedes Kettenglied äußere Stege 12, die das Band 6 an den Rändern der Aussparung 4 fest gegen das Gießrad 5 drücken. Die Stege 12 sind durch ein Brückenelement 13 miteinander verbunden. Dieses wird im Abstand über das Stahlband 6 geführt, so daß dieses über der Aussparung 4 selbst keinem radialen Anpreßdruck ausgesetzt ist. Die Stege 12 der einzelnen Kettenglieder schließen direkt aneinander an, so daß sie eine durchgehende Andrucklinie zu beiden Seiten des Bandes 6 bilden.The formation of a link of the chain 11 is shown in cross section in FIG. 2. According to this, each chain link has outer webs 12, which press the band 6 firmly against the casting wheel 5 at the edges of the recess 4. The webs 12 are connected to one another by a bridge element 13. This is guided at a distance over the steel band 6 so that it is not itself exposed to any radial contact pressure via the recess 4. The webs 12 of the individual chain links adjoin one another directly, so that they form a continuous pressure line on both sides of the belt 6.

Dadurch, daß der Druck des Bandes gegen das Gießrad nicht mehr über eine im Band selbst erzeugte Zugkraft, sondern durch Stege eines gesonderten Andruckelements erzielt wird, ist die mechanische Beanspruchung des Bandes erheblich vermindert. Es läßt sich auf diese Weise ohne weiteres erreichen, daß der Verschleiß des Bandes auf ein Zehntel oder weniger herabgesetzt wird.The fact that the pressure of the belt against the casting wheel is no longer achieved by a tensile force generated in the belt itself, but by webs of a separate pressure element, the mechanical stress on the belt is considerably reduced. It can be easily achieved in this way that the wear of the Ban which is reduced to a tenth or less.

Der Stahl in der Aussparung 4 erstarrt während der Drehung des Gießrades 5 zwischen den beiden Umlenkrollen 8 und 9 soweit, daß sich eine feste Schale bildet. Dieser teilerstarrte Strang wird von einem nicht dargestellten wassergekühlten Abstreifmeißel aus der Aussparung 4 gelöst und einer anschließenden Biegezone mit Richttreiber zugeführt. Das sich weiterdrehende Gießrad wird durch Bürsten gesäubert, getrocknet und mit Gießöl eingesprüht.The steel in the recess 4 solidifies during the rotation of the casting wheel 5 between the two deflection rollers 8 and 9 to such an extent that a solid shell is formed. This partially solidified strand is released from the recess 4 by a water-cooled scraper, not shown, and fed to a subsequent bending zone with a directional driver. The casting wheel, which continues to rotate, is cleaned by brushing, drying and sprayed with casting oil.

Der Strang wird bereits in der Biegezone durch offene Sprühkühlung abgekühlt, so daß der flüssige Restsumpf kontrolliert verfestigt wird. Hierbei wird er durch mehrere Rollen gerade gebogen und im Richttreiber endgültig gerichtet.The strand is already cooled in the bending zone by open spray cooling, so that the residual liquid sump is solidified in a controlled manner. Here it is straightened by several rollers and finally straightened in the straightening driver.

Der Strang durchläuft anschließend eine sogenannte Ausgleichszone, in der eine zusätzliche Kühlung nicht stattfindet und ein Wärmeausgleich im Strang erfolgt. Am Ende dieser Ausgleichszone besitzt er somit ein über seinen Querschnitt weitgehend homogenes Temperaturfeld. Er kann dann unmittelbar in eine Walzstraße eingeführt werden.The strand then passes through a so-called compensation zone in which additional cooling does not take place and heat compensation takes place in the strand. At the end of this compensation zone, it therefore has a temperature field that is largely homogeneous across its cross section. It can then be inserted directly into a rolling mill.

Claims (5)

1. Bar casting device wherein molten material is fed into a recess (4), which extends along the outer circumference of a casting wheel (5) in its peripheral direction and is externally open in the radial direction, in which recess the material at least partly solidifies during the rotary movement of the casting wheel (5) prior to the thus formed extrusion being guided out of the recess (4) by a band (6), which is pressed against the casting wheel (5) and at least partly seals the section of the recess (4) which is filled with said material in the peripheral direction, and at least one separate abutment means in the shape of a circumventing chain (11), applying pressure behind the band (6), as seen from the casting wheel (5), to the casting wheel (5) against the casting wheel, characterised in that the links of the chain (11) each consist of two outer webs (12) pressing the band (6) outside the recess (4) against the casting wheel (5) and extending in its peripheral direction, and a bridging element (13), which connects said webs and is not in contact with the band.
2. Device according to claim 1 characterised in that the band consists of a circumventing steel band (6).
3. Device according to claim 1 and 2 characterised in that the circumventing chain (11) and the band (6) are each guided via three deflection rollers (7, 8, 9; 8,9, 10) two of which are mutually applicable to the chain (11) and the band (6).
4. Device according to claim 3 characterised in that at least one deflection roller (10) of the deflection rollers (8, 9, 10) for the chain (11) is displaceably mounted and subjected to a force which extends a tensile force in the chain (11).
5. Device according to one of the claims 2 to 4 characterised in that the links of the chain (11) establish a continuous abutment line relative to the edges of the recess (4).
EP85905318A 1984-10-17 1985-10-16 Bar casting device Expired - Lifetime EP0197135B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85905318T ATE59798T1 (en) 1984-10-17 1985-10-16 CONTINUOUS CASTING DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3438482 1984-10-17
DE19843438482 DE3438482A1 (en) 1984-10-17 1984-10-17 CONTINUOUS CASTING DEVICE

Publications (2)

Publication Number Publication Date
EP0197135A1 EP0197135A1 (en) 1986-10-15
EP0197135B1 true EP0197135B1 (en) 1991-01-09

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ID=6248374

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85905318A Expired - Lifetime EP0197135B1 (en) 1984-10-17 1985-10-16 Bar casting device

Country Status (6)

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US (1) US4693295A (en)
EP (1) EP0197135B1 (en)
BR (1) BR8506993A (en)
CA (1) CA1242562A (en)
DE (2) DE3438482A1 (en)
WO (1) WO1986002298A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100537429B1 (en) * 2003-05-13 2005-12-19 한국기계연구원 Apparatus for manufacturing the plate of magnesium alloys by wheel-band continuous casting, and manufacturing method thereof
CN110842841A (en) * 2019-11-19 2020-02-28 徐州易尚饰家装饰工程有限责任公司 Steel cable tensioning structure

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2206930A (en) * 1938-07-29 1940-07-09 William R Webster Continuous molding machine
US2246907A (en) * 1940-04-12 1941-06-24 William R Webster Continuous molding machine
GB861273A (en) * 1959-05-21 1961-02-15 Cie Metaux Doverpelt Lommel Improvements in and relating to the casting of non-ferrous metals
FR1254709A (en) * 1959-05-21 1961-02-24 Cie Metaux Doverpelt Lommel Continuous casting of non-ferrous metals in wide strips
US4030537A (en) * 1975-06-25 1977-06-21 Southwire Company Thin gauge casting wheel band
FR2359663A1 (en) * 1976-07-27 1978-02-24 Pechiney Aluminium HIGH THERMAL CONDUCTIVITY TENSIONAL METAL TAPE FOR CASTING MACHINE

Also Published As

Publication number Publication date
BR8506993A (en) 1987-01-06
DE3438482A1 (en) 1986-04-17
DE3581289D1 (en) 1991-02-14
CA1242562A (en) 1988-10-04
WO1986002298A1 (en) 1986-04-24
US4693295A (en) 1987-09-15
EP0197135A1 (en) 1986-10-15

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