WO2003068425A1 - Method for the continuous rolling of a metal bar, particularly a steel bar, which is produced at a casting speed and the cross section of which is configured as a thin slab, and corresponding continuous casting machine - Google Patents

Method for the continuous rolling of a metal bar, particularly a steel bar, which is produced at a casting speed and the cross section of which is configured as a thin slab, and corresponding continuous casting machine Download PDF

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Publication number
WO2003068425A1
WO2003068425A1 PCT/EP2003/000831 EP0300831W WO03068425A1 WO 2003068425 A1 WO2003068425 A1 WO 2003068425A1 EP 0300831 W EP0300831 W EP 0300831W WO 03068425 A1 WO03068425 A1 WO 03068425A1
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WO
WIPO (PCT)
Prior art keywords
casting
strand
rolling
continuous
driver
Prior art date
Application number
PCT/EP2003/000831
Other languages
German (de)
French (fr)
Inventor
Wolfgang Henning
Karl Rittner
Sitki Altuntop
Manfred Kolakowski
Original Assignee
Sms Demag Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sms Demag Aktiengesellschaft filed Critical Sms Demag Aktiengesellschaft
Priority to EP03704481A priority Critical patent/EP1474252B1/en
Priority to KR1020047008396A priority patent/KR100971901B1/en
Priority to US10/503,873 priority patent/US20050167076A1/en
Priority to UA20040907497A priority patent/UA84128C2/en
Priority to JP2003567601A priority patent/JP4447922B2/en
Priority to AU2003206789A priority patent/AU2003206789A1/en
Priority to DE50306657T priority patent/DE50306657D1/en
Priority to CA2474973A priority patent/CA2474973C/en
Publication of WO2003068425A1 publication Critical patent/WO2003068425A1/en

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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
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1226—Accessories for subsequent treating or working cast stock in situ for straightening strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0007—Cutting or shearing the product
    • B21B2015/0014—Cutting or shearing the product transversely to the rolling direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/14—Soft reduction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B41/00—Guiding, conveying, or accumulating easily-flexible work, e.g. wire, sheet metal bands, in loops or curves; Loop lifters
    • B21B41/08—Guiding, conveying, or accumulating easily-flexible work, e.g. wire, sheet metal bands, in loops or curves; Loop lifters without overall change in the general direction of movement of the work

Definitions

  • the invention relates to a method for the continuous rolling of a metal strand dimensioned in cross section as a thin slab and produced at the casting speed, in particular a steel strand which is bent, straightened in the cooling state, straightened, cross-divided as required and introduced into a first rolling stand for rolling after comparing the temperature and relates to an associated one continuous casting machine.
  • Such a method is used for so-called thin slabs, the cast thickness of which is approximately 50-90 mm and which are rolled out into strips.
  • energy and labor can be saved to a considerable extent.
  • Two different methods are preferably used for this, but they want to achieve the same result.
  • a thin slab of 90 mm is cast and reduced to a thickness of 15 mm in several rolling stages.
  • the cooling that occurs during the thickness reduction is compensated for by a correspondingly long induction heating station.
  • the thin slab is then wound up and placed in a warming chamber.
  • a coil can then be unwound and rolled in a hot rolling mill.
  • a funnel mold is used, which forms a thin slab approx. 50 mm thick.
  • the end of the so-called CSP process represents a cross-cutting device in which cast slabs are cut to length, after which the individual lengths are brought to a homogenization of the slab temperature in a compensation furnace.
  • a temporary standstill of the rolling mill is compensated for by the leveling furnace, in which the individual lengths remain.
  • the slabs can move at a higher speed than the casting speed so that there are gaps between the slabs.
  • an additional furnace length is provided as a buffer section.
  • the need is e.g. determined by the roller service life or, if the casting speed differs from the rolling speed, from the furnace length (so-called semi-endless rolling).
  • the casting machine must be designed in accordance with the rolling principle. Later changes - such as a change to continuous rolling - otherwise large conversions on the casting machine up to the foundation of the plant.
  • the invention has for its object to design the continuous casting plant from the beginning so that the rolling process can be changed even later.
  • the aim is to enable continuous rolling later with the existing continuous casting machine.
  • the object is achieved according to the invention in that, with the support of a vertically cast and solidifying casting strand with a guide length matched to the casting speed, the casting strand is bent in one or more sections and in a loop supported from below in a directional driver arranged approximately at the loop length the cross dividing is performed.
  • the advantage of such a loop is a buffer, due to which speed differences between continuous casting and rolling can be compensated for in continuous rolling. Provisions have been made in the vertical strand guide that the strand support can be extended for higher casting speeds by adding a segment.
  • the loop can be monitored. According to further features, in view of the larger support length, casting speeds of approx. 8 to 12 m / min can be used.
  • the casting strand is bent in the loop outlet. As a result, a different sag of the sling is taken into account due to a changing insertion angle.
  • the thin slab is pierced with a thickness of approximately 50 mm.
  • endless rolling can also be practiced in such a way that with a casting thickness greater than 50 mm, e.g. 60 to 70 mm, via an LCR (Liquid Core Reduction) the desired roll thickness is reduced to such an extent that the solidification in the existing strand support is ended without extension.
  • LCR Liquid Core Reduction
  • the associated continuous casting machine which is connected upstream of a rolling train during continuous rolling and on which a metal, in particular steel strand, dimensioned as a thin slab, can be cast, with a vertical strand support which is adjusted to the casting speed and to which at least one bending driver, a straightening driver, is provided , connecting a cross-cutting device, a continuous furnace and the first rolling stand is designed for continuous rolling in that between the bending driver and the straightening driver there is a free space that extends downward from zero level, in which a low position for a maximum loop of the casting Strands provided lifting and lowering roller section is arranged.
  • the continuous casting mold used is a CSP funnel mold.
  • the continuous casting device can be prepared for higher casting speeds in that at least one further support segment can be installed as the casting speed increases.
  • the bending driver is initially arranged on a separate support structure.
  • the start-up line system can be used with existing systems. With vertical casting machines, it is advantageous that a starting strand can be conveyed vertically downwards.
  • start-up line can be extended upwards to zero level behind the directional driver.
  • Auxiliary roller table is provided for the start of the strand and the start-up strand head.
  • Fig. 2 is a partial view of a vertical continuous casting machine with a short
  • FIG. 3 the same partial view for endless operation, with extended strand guidance and the driver on the foundation.
  • the continuous casting machine 1 is a vertical casting device, from which the casting strand 2 is withdrawn vertically from the continuous casting mold (not shown) and is completely cooled in a strand support 3 between a number of strand support roller pairs 3a, the casting strand 1 solidifying.
  • Driving force is transmitted to the casting strand by at least two pull-out roller pairs 3b.
  • the support roller 5 is the counter roller and support during decoupling and later the support or unwinding point of the cast slab 2 in the sheet.
  • a free space 10 is formed in the foundation.
  • a straightening driver 6 which picks up the casting strand 2 and straightens it horizontally.
  • the straightening driver 6 is followed by a cross-dividing device 7, which, as shown, can consist of a pair of scissors 7a, and then the cast slab strand 2 or the partial casting strand lengths move into a continuous furnace 8 for homogenizing the temperature and adjusting the rolling Temperature.
  • the straightening driver 6 stands for endless rolling at the zero level 9, on which the straightening driver 6 also stands for single slab rolling, position 17.
  • the directional driver 6 can be moved to create the space 10 for the loop 11.
  • the cast slab 2 forms a loop 11 during continuous rolling in order to enable the speed to be compensated for between the casting and the rolling speed.
  • the sling 11 is supported by means of a roller section 12 which can be raised and lowered.
  • a further support segment 13 has been installed at 8 to 12 m / min.
  • the bending driver 3b, 4 is first placed on a special support structure 14.
  • the tried-and-tested starting line 15 is passed vertically past the bending roller 5, driven and held out of the casting line by starting line drive rollers 18 and by starting line guides 19 and 20 (FIG. 2).
  • the strand support 3 is used for a current casting speed of e.g. 6 m / min on e.g. 10 m high.
  • the adjoining bending driver 4 stands on the support structure 14 together with the pull-out roller pairs 3b.
  • a further support segment 13 is installed in order to drive higher casting speeds.
  • the bending driver 3b, 4, the support roller 5 and the cold strand driver system are laid down and then rest on the foundation, as can be seen in FIG. 3.
  • the directional driver 6 is moved from the dashed position 17 (FIG. 1) to the cross-section device 7. This creates the space for the loop 11, on the basis of which the difference in speed between casting and rolling can be compensated.
  • a flame cutting device 16 for an emergency cut can be arranged below the pull-out roller pairs 3b in the area of the bending driver 4.

Abstract

Disclosed are a method and a corresponding continuous casting machine (1) for continuously rolling a metal bar, particularly a steel bar, which is produced at a casting speed and the cross section of which is configured as a thin slab. Said metal bar is bent, dressed, and cut to length as required during cooling and is fed into a first roll stand for rolling once the temperature has been equalized. Optionally the metal bar can still be fed by modifying the casting machine by supporting (3) a vertically cast continuous slab (2) having a guide length that is adjusted to the casting rate. One or several segments of said continuous slab (2) is/are then dressed by bending and straightening, whereupon the continuous slab (2) is guided by a sling (11), which is supported from below, into a straightening driver (6) that is positioned at a distance approximately equivalent to the length of the sling before being cut to length (7).

Description

Verfahren zum Endloswalzen eines Im Querschnitt als Dünnbramme bemessenen, mit Gießgeschwindigkeit erzeugten Metallstrangs, insbeson- dere eines Stahlstrangs, und zugehörige StranggießmaschineProcess for the continuous rolling of a metal strand, in particular a steel strand, measured in cross section as a thin slab and produced at the casting speed, and associated continuous casting machine
Die Erfindung betrifft ein Verfahren zum Endloswalzen eines im Querschnitt als Dünnbramme bemessenen, mit Gießgeschwindigkeit erzeugten Metallstrangs, insbesondere eines Stahlstrangs, der im Abkühlungszustand gebogen, gerichtet, nach Bedarf quergeteilt und nach Vergleichmäßigen der Temperatur in ein erstes Walzgerüst zum Walzen eingeführt wird und betrifft eine zugehörige Stranggießmaschine.The invention relates to a method for the continuous rolling of a metal strand dimensioned in cross section as a thin slab and produced at the casting speed, in particular a steel strand which is bent, straightened in the cooling state, straightened, cross-divided as required and introduced into a first rolling stand for rolling after comparing the temperature and relates to an associated one continuous casting machine.
Ein derartiges Verfahren wird für sog. Dünnbrammen angewendet, deren gegossene Dicke ca. 50 - 90 mm beträgt und die zu Bändern ausgewalzt werden. Im Vergleich mit herkömmlichen Stranggießanlagen und Walzstraßen können Energie und Arbeitsaufwand in erheblichem Umfang eingespart werden. Hierzu werden vorzugsweise zwei unterschiedliche Verfahren eingesetzt, die jedoch das gleiche Ergebnis erreichen wollen. Zum einen wird eine Dünnbramme von 90 mm gegossen und in mehreren Walzstufen auf eine Dicke von 15 mm reduziert. Die während der Dickenreduzierung auftretende Abkühlung wird durch eine entsprechend lange Induktions-Heiz-station wieder ausgeglichen. An- schließend wird die Dünnbramme aufgewickelt und in einer Warmhaltekammer untergebracht. Danach kann ein Wickel in einer Warmwalzstraße wieder abgewickelt und gewalzt werden. Zum anderen wird eine Trichterkokille angewendet, die eine Dünnbramme von ca. 50 mm Dicke formt. Der Auslauf des sog. CSP- Verfahrens ( = compact strip production / kompakte Bandherstellung) stellt eine Querteileinrichtung dar, in der gegossene Brammen auf Länge geschnitten werden, wonach die Einzellängen in einem Ausgleichsofen zur Homogenisierung der Brammentemperatur gebracht werden. Ein zeitweiliger Stillstand der Walzstraße wird durch den Ausgleichofen, in dem die Einzellängen verbleiben, ausgeglichen. Außerdem können die Brammen mit höherer Geschwindigkeit als der Gießgeschwindigkeit bewegt werden, so dass zwischen den Brammen Abstände vorhanden sind. Außerdem ist eine zusätzliche Ofenlänge als Pufferstrecke vorgesehen. Bei einem Stillstand des Walzwerks kann die Gießmaschine so lange weiter arbeiten bis diese Freiräume aufgefüllt sind.Such a method is used for so-called thin slabs, the cast thickness of which is approximately 50-90 mm and which are rolled out into strips. In comparison to conventional continuous casting plants and rolling mills, energy and labor can be saved to a considerable extent. Two different methods are preferably used for this, but they want to achieve the same result. On the one hand, a thin slab of 90 mm is cast and reduced to a thickness of 15 mm in several rolling stages. The cooling that occurs during the thickness reduction is compensated for by a correspondingly long induction heating station. The thin slab is then wound up and placed in a warming chamber. A coil can then be unwound and rolled in a hot rolling mill. On the other hand, a funnel mold is used, which forms a thin slab approx. 50 mm thick. The end of the so-called CSP process (= compact strip production) represents a cross-cutting device in which cast slabs are cut to length, after which the individual lengths are brought to a homogenization of the slab temperature in a compensation furnace. A temporary standstill of the rolling mill is compensated for by the leveling furnace, in which the individual lengths remain. In addition, the slabs can move at a higher speed than the casting speed so that there are gaps between the slabs. In addition, an additional furnace length is provided as a buffer section. When the rolling mill is at a standstill, the casting machine can continue to work until these free spaces are filled.
Der Bedarf wird z.B. durch die Walzenstandzeit bestimmt oder bei von der Walzgeschwindigkeit abweichender Gießgeschwindigkeit von der Ofenlänge (sog. Semi-Endloswalzen).The need is e.g. determined by the roller service life or, if the casting speed differs from the rolling speed, from the furnace length (so-called semi-endless rolling).
Die Auslegung der Gießmaschine muss auf das Walzprinzip abgestimmt sein. Spätere Änderungen- wie z.B. ein Wechsel zum Endloswalzen - bedingen an der Gießmaschine sonst große Umbauten bis hin zum Fundament der Anlage.The casting machine must be designed in accordance with the rolling principle. Later changes - such as a change to continuous rolling - otherwise large conversions on the casting machine up to the foundation of the plant.
Der Erfindung liegt die Aufgabe zugrunde, die Stranggieß-Anlage von Anfang an so zu konzipieren, dass auch noch später das Walz-Verfahren geändert werden kann. So wird angestrebt, mit der vorhandenen Stranggießmaschine später auch noch das Endloswalzen zu ermöglichen.The invention has for its object to design the continuous casting plant from the beginning so that the rolling process can be changed even later. The aim is to enable continuous rolling later with the existing continuous casting machine.
Die gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, dass unter Stützung eines senkrecht gegossenen und erstarrenden Gießstrangs mit einer auf die Gießgeschwindigkeit abgestimmten Führungslänge, der Gießstrang in einem oder mehreren Abschnitten biegegerichtet und in einer von unten gestützten Schlinge in einen etwa um die Schlingenlänge entfernt angeordneten Richttreiber vor dem Querteilen geführt wird. Der Vorteil einer solchen Schlinge ist ein Puffer, aufgrund dessen beim Endloswalzen Geschwindigkeits- Unterschiede zwischen dem Stranggießen und dem Walzen ausgeglichen werden können. In der senkrechten Strangführung sind Vorkehrungen getroffen, dass durch Hinzufügen eines Segments die Strangstützung für höhere Gießgeschwindigkeiten verlängert werden kann.The object is achieved according to the invention in that, with the support of a vertically cast and solidifying casting strand with a guide length matched to the casting speed, the casting strand is bent in one or more sections and in a loop supported from below in a directional driver arranged approximately at the loop length the cross dividing is performed. The advantage of such a loop is a buffer, due to which speed differences between continuous casting and rolling can be compensated for in continuous rolling. Provisions have been made in the vertical strand guide that the strand support can be extended for higher casting speeds by adding a segment.
Je nach der geforderten Walzgeschwindigkeit kann die Schlinge überwacht werden. Nach weiteren Merkmalen kann in Anbetracht der größeren Stützlänge mit Gießgeschwindigkeiten von ca. 8 bis 12 m / min gegossen werden.Depending on the required rolling speed, the loop can be monitored. According to further features, in view of the larger support length, casting speeds of approx. 8 to 12 m / min can be used.
Mit den aufgezeigten Verfahren kann eine Dünnbramme mit einer Erstarrungs- Dicke von 50 bis 70 mm erzeugt werden.With the methods shown, a thin slab with a solidification thickness of 50 to 70 mm can be produced.
Vorteilhaft ist ferner, dass der Gießstrang im Auslauf der Schlinge biegegerichtet wird. Dadurch wird aufgrund eines sich ändernden Einführungswinkels ein unterschiedlicher Durchhang der Schlinge berücksichtigt.It is also advantageous that the casting strand is bent in the loop outlet. As a result, a different sag of the sling is taken into account due to a changing insertion angle.
Dabei ist weiter vorteilhaft, dass bei Anheben der Gießgeschwindkeit auf die Walz-Einzugsgeschwindigkeit des ersten Walzgerüstes die Dünnbramme mit einer Dicke von etwa 50 mm angestochen wird.It is further advantageous that when the casting speed is raised to the roll feed speed of the first roll stand, the thin slab is pierced with a thickness of approximately 50 mm.
Gemäß einer anderen Alternativen kann das Endloswalzen auch dahingehend praktiziert werden, dass bei größerer Gießdicke als 50 mm, z.B. 60 bis 70 mm, über eine LCR (Liquid-Core-Reduction) die angestrebte Walzdicke soweit reduziert wird, dass die Durcherstarrung in der vorhandenen Strangstützung ohne Verlängerung beendet wird. Auch in diesem Fall können Vorkehrungen für eine entsprechende Schlinge zum Geschwindigkeits-Ausgleich Gießen / Walzen getroffen werden.According to another alternative, endless rolling can also be practiced in such a way that with a casting thickness greater than 50 mm, e.g. 60 to 70 mm, via an LCR (Liquid Core Reduction) the desired roll thickness is reduced to such an extent that the solidification in the existing strand support is ended without extension. In this case, too, provisions can be made for a corresponding casting / rolling speed compensation.
Die zugehörige Stranggießmaschine, die einer Walzstraße beim Endloswalzen vorgeschaltet ist und auf der im Querschnitt ein als Dünnbramme bemessener Metall-, insbesondere Stahlstrang, gießbar ist, wobei eine senkrechte, auf die Gießgeschwindigkeit abgestellte Strangstützung vorgesehen ist, an die sich zumindest ein Biegetreiber, ein Richttreiber, eine Querteileinrichtung, ein Durchlaufofen und das erste Walzgerüst anschließen, wird für das Endloswalzen dadurch gestaltet, dass zwischen dem Biegetreiber und dem Richttreiber ein sich etwa vom Null-Niveau nach unten erstreckender Freiraum vorgesehen ist, in dem ein in einer Tiefststellung für eine maximale Schlinge des Gieß- Strangs vorgesehener heb- und senkbarer Rollenabschnitt angeordnet ist. Die Vorteile der rein senkrechten, symmetrischen Erstarrung und die Anwendung des bisherigen Anfahrstrang-Systems bleiben dabei erhalten.The associated continuous casting machine, which is connected upstream of a rolling train during continuous rolling and on which a metal, in particular steel strand, dimensioned as a thin slab, can be cast, with a vertical strand support which is adjusted to the casting speed and to which at least one bending driver, a straightening driver, is provided , connecting a cross-cutting device, a continuous furnace and the first rolling stand is designed for continuous rolling in that between the bending driver and the straightening driver there is a free space that extends downward from zero level, in which a low position for a maximum loop of the casting Strands provided lifting and lowering roller section is arranged. The advantages of purely vertical, symmetrical solidification and the use of the previous start-up system are retained.
Weitere Merkmale sehen vor, dass die Bildung der Schlinge durch den Richttreiber und damit der Geschwindigkeitsabgleich Gießen / Walzen überwacht wird.Other features provide that the formation of the loop is monitored by the straightening driver and thus the speed comparison of casting / rolling.
Es ist weiter vorteilhaft, dass die verwendete Stranggießkokille eine CSP- Trichterkokille ist.It is further advantageous that the continuous casting mold used is a CSP funnel mold.
Die Stranggießvorrichtung kann für höhere Gießgeschwindigkeiten dadurch vorbereitet sein, dass bei steigender Gießgeschwindigkeit zumindest ein weiteres Stützsegment einbaubar ist.The continuous casting device can be prepared for higher casting speeds in that at least one further support segment can be installed as the casting speed increases.
Im Fall einer späteren Änderung der Walzstrategie ist es vorteilhaft, wenn der Biegetreiber zunächst auf einer gesonderten Stützkonstruktion angeordnet ist.In the event of a later change in the rolling strategy, it is advantageous if the bending driver is initially arranged on a separate support structure.
Das Anfahrstrang-System kann bei vorhandenen Anlagen genutzt werden. So ist bei Senkrechtgießmaschinen vorteilhaft, dass ein Anfahrstrang senkrecht nach unten ausförderbar ist.The start-up line system can be used with existing systems. With vertical casting machines, it is advantageous that a starting strand can be conveyed vertically downwards.
Eine Alternative je nach Anlagen-Typ besteht darin, dass der Anfahrstrang auf Null-Niveau hinter dem Richttreiber nach oben ausfahrbar ist.An alternative, depending on the type of system, is that the start-up line can be extended upwards to zero level behind the directional driver.
Hierzu ist noch von Vorteil, dass auf dem Null-Niveau ein querverfahrbarerTo this end, it is also advantageous that a cross-traversable one at zero level
Hilfsrollgang für den Stranganfang und den Anfahrstrang-Kopf vorgesehen ist.Auxiliary roller table is provided for the start of the strand and the start-up strand head.
Weitere Merkmale ergeben sich noch daraus, dass im Bereich des Biegetreibers eine für einen Notschnitt ausrückbare Brennschneideinrichtung vorgese- hen ist. In der Zeichnung sind Ausführungsbeispiele dargestellt, die nachfolgend näher beschrieben werden.Further features result from the fact that a flame cutting device that can be disengaged for an emergency cut is provided in the area of the bending driver. Exemplary embodiments are shown in the drawing and are described in more detail below.
Es zeigen:Show it:
Fig. 1 einen Längsschnitt durch eine Gieß-Walz-Anlage zum endlosen Walzen,1 shows a longitudinal section through a casting and rolling plant for endless rolling,
Fig. 2 eine Teilansicht einer Senkrecht-Stranggießmaschine mit kurzerFig. 2 is a partial view of a vertical continuous casting machine with a short
Strangstützung für den Einzelbrammenbetrieb, wobei der Biegetreiber aufgestützt ist und Fig. 3 dieselbe Teilansicht für den Endlosbetrieb, mit verlängerter Strangführung und dem Treiber auf dem Fundament.Strand support for single slab operation, the bending driver being supported and FIG. 3 the same partial view for endless operation, with extended strand guidance and the driver on the foundation.
Die Stranggießmaschine 1 ist eine Senkrechtgießvorrichtung, aus der der Gießstrang 2 senkrecht aus der (nicht gezeigten) Stranggießkokille abgezogen und in einer Strangstützung 3 zwischen einer Reihe von Strangstütz- Rollenpaaren 3a vollends gekühlt wird, wobei der Gießstrang 1 durcherstarrt. Dabei wird auf den Gießstrang durch zumindest zwei Auszieh-Rollenpaare 3b Antriebskraft übertragen. Unter den Auszieh-Rollenpaaren 3b befindet sich eine Biegerolle 4, die die gegossene Bramme 2 aus der Senkrechten abbiegt und dabei Bramme 2 und Anfahrstrang 15 entkoppelt. Die Stützrolle 5 ist dabei Ge- genhalterolle und Abstützung beim Entkoppeln und später Stütz- oder Abrollpunkt der gegossenen Bramme 2 im Bogen. Im weiteren Strangverlauf ist ein Freiraum 10 im Fundament gebildet. Am Ende des Freiraums in Gießstrang- Bewegungsrichtung befindet sich ein Richttreiber 6, der den Gießstrang 2 aufnimmt und horizontal gerade richtet. Auf den Richttreiber 6 folgt eine Quertei- leinrichtung 7, die, wie gezeichnet, aus einer Schere 7a bestehen kann, und daran anschließend wandern der gegossene Brammenstrang 2 oder die Gießstrang-Teillängen in einen Durchlaufofen 8 zur Homogenisierung der Temperatur und zur Einstellung der Walz-Temperatur. Der Richttreiber 6 steht für das Endloswalzen auf dem Null-Niveau 9, auf dem auch der Richttreiber 6 beim Einzelbrammen-Walzen steht, Position 17. Beim Wechsel auf das Endloswal- zen kann der Richttreiber 6 versetzt werden, um den Freiraum 10 für die Schlinge 11 zu schaffen.The continuous casting machine 1 is a vertical casting device, from which the casting strand 2 is withdrawn vertically from the continuous casting mold (not shown) and is completely cooled in a strand support 3 between a number of strand support roller pairs 3a, the casting strand 1 solidifying. Driving force is transmitted to the casting strand by at least two pull-out roller pairs 3b. Under the pull-out roller pairs 3b there is a bending roller 4 which bends the cast slab 2 from the vertical and thereby decouples the slab 2 and the start strand 15. The support roller 5 is the counter roller and support during decoupling and later the support or unwinding point of the cast slab 2 in the sheet. In the further course of the strand, a free space 10 is formed in the foundation. At the end of the free space in the casting strand movement direction there is a straightening driver 6 which picks up the casting strand 2 and straightens it horizontally. The straightening driver 6 is followed by a cross-dividing device 7, which, as shown, can consist of a pair of scissors 7a, and then the cast slab strand 2 or the partial casting strand lengths move into a continuous furnace 8 for homogenizing the temperature and adjusting the rolling Temperature. The straightening driver 6 stands for endless rolling at the zero level 9, on which the straightening driver 6 also stands for single slab rolling, position 17. When changing to the continuous rolling zen the directional driver 6 can be moved to create the space 10 for the loop 11.
Zwischen dem Richttreiber 6 und der Stranggießmaschine 1 bildet die gegossene Bramme 2 beim Endloswalzen eine Schlinge 11 , um den Geschwindig- keitsausgleich zwischen der Gieß- und der Walzgeschwindigkeit zu ermöglichen. Die Schlinge 11 wird mittels eines heb- und senkbaren Rollenabschnitts 12 gestützt. Im Hinblick auf die hohe Gießgeschwindigkeit von z.B. 8 bis 12 m/ min ist ein weiteres Stützsegment 13 eingebaut worden.Between the straightening driver 6 and the continuous casting machine 1, the cast slab 2 forms a loop 11 during continuous rolling in order to enable the speed to be compensated for between the casting and the rolling speed. The sling 11 is supported by means of a roller section 12 which can be raised and lowered. In view of the high casting speed of e.g. A further support segment 13 has been installed at 8 to 12 m / min.
Um die spätere Verlängerung der Strangstützung 3 zu ermöglichen, ist der Biegetreiber 3b, 4 zunächst auf einer besonderen Stützkonstruktion 14 aufgesetzt . Dabei wird der Anfahrstrang 15 in bewährter Bauweise senkrecht an der Biegerolle 5 vorbei, angetrieben und gehalten durch Anfahrstrang-Antriebsrollen 18 und durch Anfahrstrang-Führungen 19 und 20 aus der Gießlinie herausgeführt (Fig. 2).In order to enable the subsequent extension of the strand support 3, the bending driver 3b, 4 is first placed on a special support structure 14. The tried-and-tested starting line 15 is passed vertically past the bending roller 5, driven and held out of the casting line by starting line drive rollers 18 and by starting line guides 19 and 20 (FIG. 2).
Bei einer normalen CSP-Anlage ( vgl. Fig. 2), bei der der Freiraum 10 schon eingeplant ist, wird die Strangstützung 3 für eine zur Zeit übliche Gießgeschwindigkeit von z.B. 6 m / min auf z.B. 10 m Höhe festgelegt. Der daran an- schließende Biegetreiber 4 steht zusammen mit den Auszieh-Rollenpaaren 3b auf der Stützkonstruktion 14. Für den Umbau zum Endloswalzen wird ein weiteres Stützsegment 13 eingebaut, um höhere Gießgeschwindigkeiten zu fahren. Der Biegetreiber 3b, 4, die Stützrolle 5 und das Kaltstrang-Treiber-System werden nach unten verlegt und ruhen dann auf dem Fundament, wie in Fig. 3 zu sehen ist. Der Richttreiber 6 wird aus der gestrichelten Position 17 (Fig. 1) an die Querteileinrichtung 7 herangerückt. Dadurch entsteht der Raum für die Schlinge 11 , aufgrund deren der Geschwindigkeits-Unterschied zwischen Gießen und Walzen ausgeglichen werden kann.In a normal CSP system (see Fig. 2), in which the free space 10 is already planned, the strand support 3 is used for a current casting speed of e.g. 6 m / min on e.g. 10 m high. The adjoining bending driver 4 stands on the support structure 14 together with the pull-out roller pairs 3b. For the conversion to continuous rolling, a further support segment 13 is installed in order to drive higher casting speeds. The bending driver 3b, 4, the support roller 5 and the cold strand driver system are laid down and then rest on the foundation, as can be seen in FIG. 3. The directional driver 6 is moved from the dashed position 17 (FIG. 1) to the cross-section device 7. This creates the space for the loop 11, on the basis of which the difference in speed between casting and rolling can be compensated.
Unterhalb der Auszieh-Rollenpaare 3b kann im Bereich des Biegetreibers 4 eine Brennschneideinrichtung 16 für einen Notschnitt angeordnet sein. BezugszeichenlisteA flame cutting device 16 for an emergency cut can be arranged below the pull-out roller pairs 3b in the area of the bending driver 4. LIST OF REFERENCE NUMBERS
1 Stranggießmaschine1 continuous casting machine
2 gegossene Bramme / Gießstrang2 cast slab / casting strand
3 Strangstützung3 strand support
3a Strangstütz-Rollenpaare3a strand support roller pairs
3b Auszieh-Rollenpaare3b pull-out roller pairs
4 Biegerolle4 bending rolls
5 Stützrolle5 support roller
6 Richttreiber6 directional drivers
7 Querteileinrichtung7 cross-section device
7a Schere7a scissors
8 Durch lauf ofen8 Through oven
9 Null-Niveau9 zero level
10 Freiraum10 free space
11 Schlinge11 noose
12 heb- und senkbarer Rollenabschnitt12 roll section that can be raised and lowered
13 Stützsegment13 support segment
14 Stützkonstruktion14 support structure
15 Anfahrstrang15 starting line
16 Brennschneideinrichtung16 flame cutting device
17 frühere Position des Richttreibers17 Former driver's position
18 Anfahrstrang-Antriebsrollen18 Start-up drive rollers
19 Anfahrstrang-Führung19 Starting strand guide
20 Anfahrstrang-Ruheposition 20 Starting line rest position

Claims

Patentansprüche claims
1. Verfahren zum Endloswalzen eines im Querschnitt als Dünnbramme bemessenen, mit Gießgeschwindigkeit erzeugten Metallstrangs, insbesondere eines Stahlstrangs, der im Abkühlungszustand gebogen, gerichtet, nach Bedarf quergeteilt und nach Vergleichmäßigen der Temperatur in ein erstes Walzgerüst zum Walzen eingeführt wird, dadurch gekennzeichnet, dass unter Stützung eines senkrecht gegossenen und erstarrenden Gießstrangs mit einer auf die Gießgeschwindigkeit abgestimmten Führungslänge, der Gießstrang in einem oder mehreren Abschnitten biegegerichtet und in einer von unten gestützten Schlinge in einen etwa um die Schlingenlänge entfernt angeordneten Richttreiber vor dem Querteilen geführt wird.1. A process for the continuous rolling of a metal strand, which is dimensioned as a thin slab and is produced at the casting speed, in particular a steel strand which, in the cooling state, is bent, straightened, cross-divided as required and introduced into a first rolling stand for rolling after comparing the temperature, characterized in that under Support of a vertically cast and solidifying casting strand with a guide length that is matched to the casting speed, the casting strand is bent in one or more sections and guided in a loop supported from below in a straightening driver arranged about the loop length in front of the cross-cutting.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass in dem oder in den Richt-Abschnitten die Schlinge überwacht wird.2. The method according to claim 1, characterized in that the loop is monitored in or in the straightening sections.
3. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass mit einer Gießgeschwindigkeit von 8 bis 12 m / min gegossen wird.3. The method according to any one of claims 1 or 2, characterized in that casting is carried out at a casting speed of 8 to 12 m / min.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass eine Dünnbramme mit einer Erstarrungs-Dicke von 50 bis 70 mm erzeugt wird. 4. The method according to any one of claims 1 to 3, characterized in that a thin slab is produced with a solidification thickness of 50 to 70 mm.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Gießstrang im Auslauf der Schlinge biegegerichtet wird.5. The method according to any one of claims 1 to 4, characterized in that the casting strand is bent in the outlet of the loop.
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass bei Anheben der Gießgeschwindigkeit auf die Walz- Einzugsgeschwindigkeit des ersten Walzgerüstes die Dünnbramme mit einer Dicke von etwa 50 mm angestochen wird.6. The method according to any one of claims 1 to 5, characterized in that the thin slab is pierced with a thickness of about 50 mm when raising the casting speed to the rolling-in speed of the first roll stand.
7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass bei größerer Gießdicke als 50 mm über eine Liquid-Core-Reduction die angestrebte Walzdicke soweit reduziert wird, dass die Durcherstarrung in der vorhandenen Strangstützung beendet wird.7. The method according to any one of claims 1 to 6, characterized in that at a casting thickness greater than 50 mm via a liquid core reduction, the desired roll thickness is reduced to such an extent that the solidification in the existing strand support is ended.
8. Stranggießmaschine, die einer Walzstraße vorgeschaltet ist und auf der im Querschnitt ein als Dünnbramme bemessener Metall-, insbesondere Stahl-strang, gießbar ist, wobei eine senkrechte, auf die Gießgeschwindigkeit abgestellte Strangstützung vorgesehen ist, an die sich zumindest ein Biegetreiber, ein Richttreiber, eine Querteileinrichtung, ein Durchlaufofen und das erste Walzgerüst anschließen, dadurch gekennzeichnet, dass zwischen dem Biegetreiber (4) und dem Richttreiber (6) ein sich etwa vom Null-Niveau (9) nach unten erstreckender Freiraum (10) vorge- sehen ist, in dem ein in einer Tiefststellung für eine maximale Schlinge8. Continuous casting machine, which is connected upstream of a rolling mill and on which a metal, in particular steel, strand, which is dimensioned as a thin slab, can be cast, wherein a vertical strand support, which is adjusted to the casting speed, is provided, to which at least one bending driver, a directional driver Connect a cross-section device, a continuous furnace and the first rolling stand, characterized in that a free space (10) extending downward from the zero level (9) is provided between the bending driver (4) and the straightening driver (6). in which one is in a low position for a maximum loop
(11) des Gießstrangs (2) vorgesehener heb- und senkbarer Rollenabschnitt (12) angeordnet ist.(11) of the casting strand (2) provided for raising and lowering roller section (12) is arranged.
9. Stranggießmaschine nach Anspruch 8, dadurch gekennzeichnet, dass die Bildung der Schlinge (11) durch den Richttreiber (6) und damit der Geschwindigkeitsabgleich Gießen / Walzen überwacht wird.9. Continuous casting machine according to claim 8, characterized in that the formation of the loop (11) is monitored by the straightening driver (6) and thus the casting / rolling speed adjustment.
10. Stranggießmaschine nach einem der Ansprüche 8 oder 9, dadurch gekennzeichnet, dass die verwendete Stranggießkokille eine CSP- Trichterkokille ist.10. Continuous casting machine according to one of claims 8 or 9, characterized in that the continuous casting mold used is a CSP funnel mold.
11. Stranggießmaschine nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, dass bei steigender Gießgeschwindigkeit zumindest ein weiteres Stütz- segment (13) einbaubar ist.11. Continuous casting machine according to one of claims 8 to 10, characterized in that with increasing casting speed at least one further support segment (13) can be installed.
12. Stranggießmaschine nach einem der Ansprüche 8 bis 11 , dadurch gekennzeichnet, dass der Biegetreiber (4) zunächst auf einer gesonderten Stützkonstruk- tion (14) angeordnet ist.12. Continuous casting machine according to one of claims 8 to 11, characterized in that the bending driver (4) is initially arranged on a separate support structure (14).
13. Stranggießmaschine nach einem der Ansprüche 8 bis 12, dadurch gekennzeichnet, dass ein Anfahrstrang (15) senkrecht nach unten ausförderbar ist.13. Continuous casting machine according to one of claims 8 to 12, characterized in that a starting strand (15) can be conveyed vertically downwards.
14. Stranggießmaschine nach einem der Ansprüche 8 bis 12, dadurch gekennzeichnet, dass der Anfahrstrang (15) auf Null-Niveau (9) hinter dem Richttreiber (6) nach oben ausfahrbar ist.14. Continuous casting machine according to one of claims 8 to 12, characterized in that the starting strand (15) at zero level (9) behind the directional driver (6) can be extended upwards.
15. Stranggießmaschine nach einem der Ansprüche 8 bis 14, dadurch gekennzeichnet, dass auf dem Null-Niveau (9) ein querverfahrbarer Hilfsrollgang für den Strang-Anfang (15) und den Anfahrstrang-Kopf vorgesehen ist. 15. Continuous casting machine according to one of claims 8 to 14, characterized in that a transversely movable auxiliary roller table for the start of the strand (15) and the starting strand head is provided at the zero level (9).
6. Stranggießmaschine nach einem der Ansprüche 8 bis 15, dadurch gekennzeichnet, dass im Bereich des Biegetreibers (4) eine für einen Notschnitt ausrückbare Brennschneideinrichtung (16) vorgesehen ist. 6. Continuous casting machine according to one of claims 8 to 15, characterized in that in the region of the bending driver (4) a disengageable cutting device (16) is provided for an emergency cut.
PCT/EP2003/000831 2002-02-15 2003-01-28 Method for the continuous rolling of a metal bar, particularly a steel bar, which is produced at a casting speed and the cross section of which is configured as a thin slab, and corresponding continuous casting machine WO2003068425A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP03704481A EP1474252B1 (en) 2002-02-15 2003-01-28 Method for the continuous rolling of a metal bar, particularly a steel bar, which is produced at a casting speed and the cross section of which is configured as a thin slab, and corresponding continuous casting machine
KR1020047008396A KR100971901B1 (en) 2002-02-15 2003-01-28 Method for the continuous rolling of a metal bar, particularly a steel bar, which is produced at a casting speed and the cross section of which is configured as a thin slab, and corresponding continuous casting machine
US10/503,873 US20050167076A1 (en) 2002-02-15 2003-01-28 Method for the continuous rolling of a metal bar, particularly a steel bar, which is produced at a casting speed and the cross section of which is configured as a thin slab, and corresponding continuous casting machine
UA20040907497A UA84128C2 (en) 2002-02-15 2003-01-28 method and corresponding continuous casting machine for continuously rolling metal bar, particularly steel bar, cross section of which is configured as thin slab
JP2003567601A JP4447922B2 (en) 2002-02-15 2003-01-28 Method for endless rolling of metal strands, in particular steel strands, formed with a casting speed, dimensioned as thin slabs in cross-section, and the continuous casting machine to which they belong
AU2003206789A AU2003206789A1 (en) 2002-02-15 2003-01-28 Method for the continuous rolling of a metal bar, particularly a steel bar, which is produced at a casting speed and the cross section of which is configured as a thin slab, and corresponding continuous casting machine
DE50306657T DE50306657D1 (en) 2002-02-15 2003-01-28 METHOD FOR THE FINAL ROLLING OF A METAL STRUCTURE, IN PARTICULAR A STEEL STRUCTURE, DESCRIBED IN THE CROSS-SECTION AS A SLOTTED BRANCH AND ASSOCIATED CONTINUOUS CASTING MACHINE
CA2474973A CA2474973C (en) 2002-02-15 2003-01-28 Method for the continuous rolling of a metal bar, particularly a steel bar, which is produced at a casting speed and the cross section of which is configured as a thin slab, and corresponding continuous casting machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10206243A DE10206243A1 (en) 2002-02-15 2002-02-15 Process for the continuous rolling of a metal strand, in particular a steel strand, which is dimensioned as a thin slab and has a casting speed, and associated continuous casting machine
DE10206243.9 2002-02-15

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