EP0662357B1 - Method of and device for operating a continuous casting installation - Google Patents
Method of and device for operating a continuous casting installation Download PDFInfo
- Publication number
- EP0662357B1 EP0662357B1 EP94117306A EP94117306A EP0662357B1 EP 0662357 B1 EP0662357 B1 EP 0662357B1 EP 94117306 A EP94117306 A EP 94117306A EP 94117306 A EP94117306 A EP 94117306A EP 0662357 B1 EP0662357 B1 EP 0662357B1
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- European Patent Office
- Prior art keywords
- strip
- pair
- strand
- reducing
- thickness
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- 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.)
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000009434 installation Methods 0.000 title 1
- 238000005096 rolling process Methods 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 238000005266 casting Methods 0.000 claims description 13
- 238000005452 bending Methods 0.000 claims description 4
- 241000196324 Embryophyta Species 0.000 claims 3
- 230000001105 regulatory effect Effects 0.000 claims 2
- 235000009854 Cucurbita moschata Nutrition 0.000 claims 1
- 240000001980 Cucurbita pepo Species 0.000 claims 1
- 235000009852 Cucurbita pepo Nutrition 0.000 claims 1
- 235000020354 squash Nutrition 0.000 claims 1
- 239000007791 liquid phase Substances 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 229910001208 Crucible steel Inorganic materials 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- IHQKEDIOMGYHEB-UHFFFAOYSA-M sodium dimethylarsinate Chemical class [Na+].C[As](C)([O-])=O IHQKEDIOMGYHEB-UHFFFAOYSA-M 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
Definitions
- the invention relates to a method and a device for operating, in particular casting, a continuous casting plant for producing thin slabs for hot strip rolling, with at least one pair of reducing rollers arranged downstream of the continuous casting mold, which are followed by adjustable strand guide elements.
- EP-B1 0 326 190 For the production of a steel strip by shaping a cast steel strand or a thin slab, EP-B1 0 326 190 has disclosed a system which consists of a continuous casting machine with an oscillating continuous mold and cooled walls and a shaping device for the steel strand arranged on the mold outlet and having a pair of reducing rollers consists.
- the continuously cast steel strip which is composed of a solidified strand shell and a liquid core, is thus reduced in thickness in a roll forming process and then rolled.
- the funnel-shaped, oscillating continuous mold has an outlet cross-section with a thickness of 40 to 50 mm, and after exiting the mold, the cast steel strip of corresponding thickness is pressed together by the pair of reducing rollers to such an extent that the inner walls of the strand shells already solidified in the mold weld together.
- the reduction in the thickness of the steel strand which has not yet solidified with the aid of the pair of reducing rollers of the shaping device and at least one rolling stand arranged downstream of it makes it possible to achieve steel strip strands with a thickness substantially below 25 mm, which is dependent on the casting speed and the pressing force of the pair of reducing rollers.
- different strip thicknesses are compensated for by adapted pressing forces of the reducing rollers.
- the invention has for its object to provide a method and a system of the type mentioned, with which an improved mode of operation, in particular for easy casting, but also at the end of casting, can be achieved and thin slabs can be obtained with a constant thickness.
- the pair of reducing rollers is set to a smaller gap width which causes the sump to be squeezed out after a predetermined length of passage of the hot strand, and the hot strand is deformed into a sprue format with a thickness below the thickness of the desired final format, and the strand guide segments or the pair of reducing rollers are then - preferably successively - adjusted to the thickness of the final format as soon as the less thick sprue format has completely reached its setting range.
- the pair of reducing rollers is brought up to the size of the final format at the earliest after the immediately downstream strand guide elements of the strand guide have been adjusted to the thickness of the desired final format.
- a completely new concept is thus proposed, the squeezing of the sump making it possible to start or stop a continuous casting machine with a thicker casting format than the desired final format.
- the hot strand which partially solidifies below the mold, is reduced in format thickness without the strand shells of the broad sides touching and welding to one another; the hot strand solidifies without deformation.
- the successive closing of the strand guide elements i.e.
- a continuous mold with an outlet cross-section with a greater thickness which further improves the flow conditions in the mold, the larger ratio of bath surface area to strand circumference further favoring the lubrication conditions in the mold and thus further improving the surface leads.
- the outlet cross section of the continuous mold can have a thickness of 70 mm, the pair of reducing rollers deforming the warm strand into a sprue format of approximately 30 mm that is thinner for the successive adjustment of the strand guide segments.
- One embodiment of the invention provides that the squeezing of the sump is pressure-controlled by the pair of reducing rollers and the pair of reducing rollers is positioned on the final format after the strand guide has been adjusted.
- the pressure control ensures that the rollers of the pair of reducing rollers follow the thickness deviations of the thin slab or the cast steel strip.
- the pair of reducing rollers is driven, the loads that occur on the cold / hot strand connection can be reduced from the casting on to the separation of the cold and warm strands.
- One embodiment of the invention provides that at the end of the casting, the end of the strand is moved into the lower part of the mold and the strand is temporarily stopped, then the pair of reducing rollers and the strand guide elements are moved one after the other to the mold exit dimension and convey the strand.
- the pair of reducing rollers and the strand guide elements are moved one after the other to the mold exit dimension and convey the strand.
- a system for carrying out the method which has a continuous casting mold and at least one pair of reducing rollers arranged downstream of it, and which has strand guiding elements, driving rollers, a bending roller and a driving device thereafter in the strand pulling direction, can have strand guiding grids immediately downstream of the deformation roller pair, and the subsequent strand guiding segments can be train as strand guide rollers supported in segments.
- the formation of the strand guiding elements arranged after the pair of reducing rollers as strand guiding grids has the advantage that the unsupported length of the strand can be reduced, since the grids can be brought closer to the reducing rollers as strand guiding rollers.
- the pair of reducing rollers is connected downstream of the strand guide grids as the first elements of the strand guide, the pair of reducing rollers is only raised to the size of the final format after the strand guide grids and the strand guide rollers of the first segment have previously been set to the thickness of the desired final format.
- a continuous caster 1 for producing a thin slab 2 for hot strip rolling has, according to FIG. 1, a continuous mold 3 and a pair of reducing rollers 4 arranged immediately after it, in the strand pulling direction first strand guide grids 5 and then strand guide rollers 6 and 7 of a first and second strand guide segment Connect 8 or 9a, 9b, ie in the exemplary embodiment, the second strand guide segment is divided into two sections 9a, 9b, each consisting of four pairs of rollers.
- the strand guide segments 8 and 9a, 9b are followed by driving rollers 10 and - for deflecting the thin slab 2 - a bending roller 11.
- the thin slab 2 then passes into a driving straightening device 12 before it subsequently runs into downstream devices, for which purpose it can be divided beforehand by scissors.
- the strand guide grids 5 and the strand guide rollers 6 and 7 of the first and second strand guide segments 8 and 9a, 9b and also the drive rollers 10 are set to the dimension of the cold / warm strand corresponding to the mold exit dimension.
- the reducing roller pair 4, which is set under pressure control against the cold strand 13, is adjusted to a smaller mouth width after a predetermined throughput length and squeezes the liquid core or sump 14.
- a band-shaped sprue format 15 is formed, the thickness of which is below the thickness of the desired final format of the thin slab 2 (cf. FIG. 1). After the given casting length, for example 1.5 m, the thickness of the sprue format 15 is less than 30 mm.
- the cold strand 13 has left the strand guide grids 5 and the strand guide rollers 6 of the first strand guide segment 8. It is thus possible to adjust the strand guide grids 5 and the strand guide rollers 6 to the thickness of the final format of the thin slab 2, which is greater than that of the sprue format 15. As can be seen in FIG. 4, the pair of reducing rollers 4 is then positioned to the size of the desired final format, so that the sprue format 15 immediately lagging can form the thin slab 2 with the desired final format.
- the strand guide rollers 7 of section 9a (cf. FIG. 5) and then also that of the second section 9b and the drive rollers 10 are adjusted to the size of the final format (cf. FIG. 6), and always when the sprue format 15 is completely within the setting range, ie in the area of the roles to be performed individually or together.
- the complete strand guide is set to the final format of the thin slab 2 (see FIGS. 1 and 6), and the continuous casting machine 1 can be used to produce the thin slabs 2 with the final format achieved by successively turning on the strand guide elements, such as shown in Fig. 1. It is understood that the cold strand has previously been separated from the warm strand, specifically when casting on after reaching the drive rollers 10.
- the end of the strand or thin slab 2 is moved into the lower parallel part of the continuous mold 4 and stopped for a short time, in which the strand can form a shell which is closed on all sides. It is therefore impossible for liquid steel to get into the continuous casting machine from the strand or thin slab 2.
- the strand guide elements strand guide grid 5 and strand guide rollers 6 or 7) and the pair of reducing rollers 4 and the drive rollers 10 are moved up to the mold exit dimension in succession.
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Abstract
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Betreiben, insbesondere Angießen, einer Stranggießanlage zum Herstellen von Dünnbrammen für die Warmbandwalzung, mit mindestens einem der Stranggießkokille nachgeordneten Reduzierrollenpaar, dem bzw. denen sich anstellbare Strangführungselemente anschließen.The invention relates to a method and a device for operating, in particular casting, a continuous casting plant for producing thin slabs for hot strip rolling, with at least one pair of reducing rollers arranged downstream of the continuous casting mold, which are followed by adjustable strand guide elements.
Zum Herstellen eines Stahlbandes durch Verformen eines gegossenen Stahlstranges bzw. einer Dünnbramme ist durch die EP-B1 0 326 190 eine Anlage bekanntgeworden, die aus einer Stranggießmaschine mit einer oszillierenden Durchlaufkokille sowie gekühlten Wänden und einer am Kokillenauslauf angeordneten, ein Reduzierrollenpaar aufweisenden Verformungsvorrichtung für den Stahlstrang besteht. Das stranggegossene Stahlband, das sich aus einer erstarrten Strangschale und einem Flüssigkeitskern zusammensetzt, wird somit in einer Rollverformung dickenverringert und anschließend gewalzt. Die trichterförmige, oszillierende Durchlaufkokille besitzt einen Austrittsquerschnitt mit einer Dicke von 40 bis 50 mm, und nach dem Austritt aus der Kokille wird das gegossene Stahlband entsprechender Dicke durch das Reduzierrollenpaar soweit zusammengedrückt, daß die inneren Wandungen der in der Kokille bereits verfestigten Strangschalen miteinander verschweißen. Die Dickenreduzierung des noch nicht durcherstarrten Stahlstranges mit Hilfe des Reduzierrollenpaars der Verformungseinrichtung sowie mindestens eines diesem nachgeordneten Walzgerüstes ermöglichen es, Stahlbandstränge mit einer wesentlich unter 25mm liegenden Dicke zu erreichen, was abhängig von der Gießgeschwindigkeit sowie der Preßkraft des Reduzierrollenpaares ist. Infolge von geänderten Gießgeschwindigkeiten hinter dem Reduzierrollenpaar auftretende unterschiedliche Banddicken werden über angepaßte Preßkräfte der Reduzierrollen kompensiert.For the production of a steel strip by shaping a cast steel strand or a thin slab, EP-
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Anlage der eingangs genannten Art zu schaffen, mit denen sich eine verbesserte Betriebsweise, insbesondere zum problemlosen Angießen, aber auch beim Gießende, erreichen läßt und Dünnbrammen mit konstanter Dicke erzielen lassen.The invention has for its object to provide a method and a system of the type mentioned, with which an improved mode of operation, in particular for easy casting, but also at the end of casting, can be achieved and thin slabs can be obtained with a constant thickness.
Diese Aufgabe wird für ein Verfahren erfindungsgemäß dadurch gelöst, daß das Reduzierrollenpaar nach einer vorgegebenen Durchlauflänge des Warmstranges auf eine kleinere, ein Abquetschen des Sumpfes bewirkende Spaltweite eingestellt wird und den Warmstrang zu einem Angußformat mit einer unterhalb der Dicke des gewünschten Endformats liegenden Dicke verformt, und die Strangführungssegmente bzw. das Reduzierrollenpaar danach - vorzugsweise sukzessive - auf die Dicke des Endformats angestellt werden, sobald das weniger dicke Angußformat vollständig in ihren Einstellbereich gelangt ist. Beim sukzessiven Einstellen, das gegenüber dem alternativ möglichen gleichzeitigen Anstellen der gesamten Strangführung die Schopfverluste (Ausbringungsverluste) minimiert, wird das Reduzierrollenpaar frühestens auf das Maß des Endformats aufgefahren, nachdem die unmittelbar nachgeschalteten Strangführungselemente der Strangfuhrung auf die Dicke des gewünschten Endformats eingestellt worden sind. Es wird somit eine völlig neue Konzeption vorgeschlagen, wobei das Abquetschen des Sumpfes es ermöglicht, eine Stranggießmaschine mit einem dickeren Gießformat als das gewünschte Endformat zu starten bzw. zu beenden. Der unterhalb der Kokille teilerstarrte Warmstrang wird in der Formatdicke reduziert, ohne daß sich dabei die Strangschalen der Breitseiten berühren und miteinander verschweißen; der Warmstrang erstarrt verformungsfrei.This object is achieved for a method according to the invention in that the pair of reducing rollers is set to a smaller gap width which causes the sump to be squeezed out after a predetermined length of passage of the hot strand, and the hot strand is deformed into a sprue format with a thickness below the thickness of the desired final format, and the strand guide segments or the pair of reducing rollers are then - preferably successively - adjusted to the thickness of the final format as soon as the less thick sprue format has completely reached its setting range. With successive adjustment, which minimizes the crop losses (output losses) compared to the alternative possible simultaneous adjustment of the entire strand guide, the pair of reducing rollers is brought up to the size of the final format at the earliest after the immediately downstream strand guide elements of the strand guide have been adjusted to the thickness of the desired final format. A completely new concept is thus proposed, the squeezing of the sump making it possible to start or stop a continuous casting machine with a thicker casting format than the desired final format. The hot strand, which partially solidifies below the mold, is reduced in format thickness without the strand shells of the broad sides touching and welding to one another; the hot strand solidifies without deformation.
Das sukzessive Schließen der Strangführungselemente, d.h. Anstellen auf das gewünschte Endformat, erlaubt den Einsatz einer einen Austrittsquerschnitt mit größerer Dicke aufweisenden Durchlaufkokille, was die Strömungsverhältnisse in der Kokille weiter verbessert, wobei das größere Verhältnis von Badspiegeloberfläche zum Strangumfang die Schmierverhältnisse in der Kokille weiter begünstigt und damit zu einer weiteren Verbesserung der Oberfläche führt. Um ein Endformat des Warmstrangs von beispielsweise 50mm zu erreichen, kann der Austrittsquerschnitt der Durchlaufkokille eine Dicke von 70mm aufweisen, wobei das Reduzierrollenpaar den Warmstrang zu einem für das nacheinander erfolgende Anstellen der Strangführungssegmente in der Dicke geringeren Angußformat von ca. 30mm verformt.The successive closing of the strand guide elements, i.e. Instead of the desired final format, it is possible to use a continuous mold with an outlet cross-section with a greater thickness, which further improves the flow conditions in the mold, the larger ratio of bath surface area to strand circumference further favoring the lubrication conditions in the mold and thus further improving the surface leads. In order to achieve a final format of the hot strand of, for example, 50 mm, the outlet cross section of the continuous mold can have a thickness of 70 mm, the pair of reducing rollers deforming the warm strand into a sprue format of approximately 30 mm that is thinner for the successive adjustment of the strand guide segments.
Eine Ausgestaltung der Erfindung sieht vor, daß das Abquetschen des Sumpfes durch das Reduzierrollenpaar druckgeregelt wird und das Reduzierrollenpaar nach der Anstellung der Strangführung auf das Endformat positioniert wird. Die Druckregelung stellt beim Abquetschen sicher, daß die Rollen des Reduzierrollenpaares Dickenabweichungen der Dünnbramme bzw. des gegossenen Stahlbandes folgen.One embodiment of the invention provides that the squeezing of the sump is pressure-controlled by the pair of reducing rollers and the pair of reducing rollers is positioned on the final format after the strand guide has been adjusted. When squeezing, the pressure control ensures that the rollers of the pair of reducing rollers follow the thickness deviations of the thin slab or the cast steel strip.
Wenn nach einem Vorschlag der Erfindung das Reduzierrollenpaar angetrieben wird, lassen sich die auftretenden Belastungen der Kalt-/Warmstrangverbindung vom Angießen bis zum Trennen von Kalt- und Warmstrang verringern.If, according to a proposal of the invention, the pair of reducing rollers is driven, the loads that occur on the cold / hot strand connection can be reduced from the casting on to the separation of the cold and warm strands.
Eine Ausgestaltung der Erfindung sieht vor, daß bei Gießende das Strangende in den unteren Teil der Kokille gefahren und der Strang temporär angehalten wird, danach das Reduzierrollenpaar und die Strangführungselemente nacheinander auf das Kokillenaustrittsmaß aufgefahren werden und den Strang ausfördern. Durch das Anhalten des Strangs im unteren Parallelteil der Kokille während einer -dickenabhängigen- Dauer von etwa 30 bis 60 sec. wird vermieden, daß flüssiger Stahl aus dem Strang in die Stranggießmaschine gelangt.One embodiment of the invention provides that at the end of the casting, the end of the strand is moved into the lower part of the mold and the strand is temporarily stopped, then the pair of reducing rollers and the strand guide elements are moved one after the other to the mold exit dimension and convey the strand. By stopping the strand in the lower parallel part of the mold for a duration of approximately 30 to 60 seconds, depending on the thickness, it is avoided that liquid steel from the strand enters the continuous casting machine.
Eine Anlage zum Durchführen des Verfahrens, die eine Stranggießkokille und mindestens ein ihr nachgeordnetes Reduzierrollenpaar sowie sich daran in Strang-Ausziehrichtung anschließend Strangführungselemente, Treibrollen, eine Biegerolle und eine Treibeinrichtung aufweist, kann dem Verformungswalzenpaar unmittelbar nachgeordnete Strangführungsgitter besitzen, und die sich anschließenden Strangführungssegmente lassen sich als anstellbar in Segmenten gelagerte Strangführungsrollen ausbilden. Das Ausbilden der im Anschluß an das Reduzierrollenpaar angeordneten Strangführungselemente als Strangführungsgitter bringt den Vorteil mit sich, daß sich die ungestützte Länge des Stranges verringern läßt, da die Gitter näher als Strangführungsrollen an die Reduzierrollen herangeführt werden können. Sind dem Reduzierrollenpaar somit Strangführungsgitter als erste Elemente der Strangführung nachgeschaltet, wird das Reduzierrollenpaar folglich erst dann auf das Maß des Endformats aufgefahren, nachdem zuvor die Strangführungsgitter und die Strangführungsrollen des ersten Segmentes auf die Dicke des gewünschten Endformats eingestellt worden sind.A system for carrying out the method, which has a continuous casting mold and at least one pair of reducing rollers arranged downstream of it, and which has strand guiding elements, driving rollers, a bending roller and a driving device thereafter in the strand pulling direction, can have strand guiding grids immediately downstream of the deformation roller pair, and the subsequent strand guiding segments can be train as strand guide rollers supported in segments. The formation of the strand guiding elements arranged after the pair of reducing rollers as strand guiding grids has the advantage that the unsupported length of the strand can be reduced, since the grids can be brought closer to the reducing rollers as strand guiding rollers. Thus, if the pair of reducing rollers is connected downstream of the strand guide grids as the first elements of the strand guide, the pair of reducing rollers is only raised to the size of the final format after the strand guide grids and the strand guide rollers of the first segment have previously been set to the thickness of the desired final format.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den Ansprüchen und der nachfolgenden Beschreibung, in der ein in den Zeichnungen dargestelltes Ausführungsbeispiel des Gegenstandes der Erfindung näher erläutert ist. Es zeigen:
- Fig.1
- eine Gesamtansicht einer Anlage zum Herstellen von Dünnbrammen bzw. Stahlbändern, schematisch und bis einschließlich einer Treibrichteinrichtung gezeigt; und
- Fig.2 bis 6
- das Angießen in Teilschritten entsprechend dem sukzessiven Einstellen der Strangführungselemente auf das gewünschte Endformat der Dünnbramme, schematisch dargestellt.
- Fig. 1
- an overall view of a plant for the production of thin slabs or steel strips, shown schematically and up to and including a driving straightening device; and
- Fig. 2 to 6
- the casting in partial steps according to the gradual adjustment of the strand guide elements to the desired final format of the thin slab, shown schematically.
Eine Stranggießanlage 1 zum Herstellen einer Dünnbramme 2 für die Warmbandwalzung weist gemäß Fig.1 eine Durchlaufkokille 3 und ein dieser unmittelbar nachgeordnetes Reduzierrollenpaar 4 auf, dem sich in Strang-Ausziehrichtung zunächst Strangführungsgitter 5 und dann Strangführungsrollen 6 bzw. 7 eines ersten bzw. zweiten Strangführungssegmentes 8 bzw. 9a,9b anschließen, d.h. das zweite Strangführungssegment ist im Ausführungsbeispiel in zwei aus jeweils vier Rollenpaaren bestehende Abschnitte 9a,9b unterteilt. Den Strangführungssegmenten 8 bzw. 9a,9b sind Treibrollen 10 und - zur Umlenkung der Dünnbramme 2 - eine Biegerolle 11 nachgeordnet. Die Dünnbramme 2 gelangt anschließend in eine Treibrichteinrichtung 12 bevor sie anschließend in nachgeschaltete Einrichtungen einläuft, wozu sie zuvor durch eine Schere unterteilt werden kann.A continuous caster 1 for producing a
Zum Angießen der Stranggießanlage 1 sind gemäß Fig. 2 die Strangführungsgitter 5 sowie die Strangführungsrollen 6 bzw. 7 des ersten und zweiten Strangführungssegmentes 8 bzw. 9a,9b und auch die Treibrollen 10 auf das dem Kokillenaustrittsmaß entsprechende Maß des Kalt-/Warmstranges eingestellt. Das gegen den Kaltstrang 13 druckgeregelt angestellte Reduzierrollenpaar 4 wird nach einer vorgegebenen Durchlauflänge auf eine kleinere Maulweite angestellt und quetscht den flüssigen Kern bzw. Sumpf 14 ab. Es bildet sich ein bandförmiges Angußformat 15 aus, dessen Dicke unterhalb der Dicke des gewünschten Endformates der Dünnbramme 2 (vgl. Fig. 1) liegt. Nach der vorgegebenen Gießlänge, z.B. 1,5 m, beträgt die Dicke des Angußformats 15 weniger als 30mm. Die Fig. 3 zeigt, daß der Kaltstrang 13 die Strangführungsgitter 5 und die Strangführungsrollen 6 des ersten Strangführungssegmentes 8 verlassen hat. Somit ist es möglich, die Strangführungsgitter 5 und die Strangführungsrollen 6 auf die Dicke des Endformats der Dünnbramme 2 einzustellen, die größer als die des Angußformats 15 ist. Wie sich Fig. 4 entnehmen läßt, wird danach das Reduzierrollenpaar 4 auf das Maß des gewünschten Endformats positioniert, so daß sich dem Angußformat 15 unmittelbar nacheilend die Dünnbramme 2 mit dem gewünschten Endformat ausbilden kann.2, the
Mit dem fortschreitenden Ausziehen des Kalt/Warmstranges bzw. des ihm nachfolgenden Angußformates 15 und der diesem folgenden Dünnbramme 2 des gewünschten Endformats werden in der beschriebenen Weise gemäß den Figuren 5 und 6 zunächst die Strangführungsrollen 7 des Abschnitts 9a (vgl.Fig. 5) und dann auch die des zweiten Abschnitts 9b sowie die Treibrollen 10 auf das Maß des Endformats eingestellt (vgl. Fig. 6), und zwar immer dann, wenn sich das Angußformat 15 vollständig im Einstellbereich, d.h. im Bereich der einzeln oder gemeinsam anzustellenden Rollen befindet. Schließlich ist die komplette Strangführung auf das Endformat der Dünnbramme 2 eingestellt (vgl. die Fig. 1 und Fig. 6), und mit der Stranggießanlage 1 lassen sich bis zum Gießende die Dünnbrammen 2 mit dem durch sukzessives Anstellen der Strangführungselemente erreichten Endformat herstellen, wie in Fig. 1 gezeigt. Es versteht sich, daß zuvor der Kaltstrang vom Warmstrang getrennt worden ist, und zwar beim Angießen nach dem Erreichen der Treibrollen 10.With the progressive pulling out of the cold / warm strand or the
Beim in den Figuren nicht gezeigten Gießende wird das Ende des Stranges bzw. der Dünnbramme 2 in den unteren Parallelteil der Durchlaufkokille 4 gefahren und für eine kurze Zeit angehalten, in der der Strang eine allseitig geschlossene Schale bilden kann. Somit ist ausgeschlossen, daß flüssiger Stahl aus dem Strang bzw. der Dünnbramme 2 in die Stranggießmaschine gelangt. Zum Ausfördern des Stranges werden nacheinander die Strangführungselemente (Strangführungsgitter 5 und Strangführungsrollen 6 bzw. 7) und das Rduzierrollenpaar 4 sowie die Treibrollen 10 auf das Kokillenaustrittsmaß aufgefahren.At the end of the casting, not shown in the figures, the end of the strand or
Claims (7)
- Method for the operation, particularly the pouring in, of a continuous casting plant (1) for the production of thin slabs (2) for hot strip rolling, comprising at least one reducing roller pair (4) which is arranged downstream of the continuous casting chill mould (3) and to which are connected adjustable strip guide elements (5 to 9), characterised thereby that the reducing roll pair (4) are adjusted to smaller gap width, which acts to squash down the material pool (14), after a predetermined passage length of the hot strip and deforms the hot strip to a pouring format (15) with a thickness lying below the thickness of the desired final format, and the strip guide elements (5 to 9) or the reducing roller pair (4) are thereafter adjusted, preferably successively, to the thickness of the final format as soon as the less thick pouring format (15) has completely passed into its setting region.
- Method according to claim 1, characterised thereby that the reducing roller pair is pressure regulated and is positioned to the final format after the adjusting of the strip guide.
- Method according to claim 1 or 2, characterised thereby that the strip guide elements are moved symmetrically to the strip centre.
- Method according to one of claims 1 to 3, characterised thereby that at the casting end the strip end is moved into the lower part of the chill mould and the strip temporarily detained, then the strip guide elements and the reducing roller pair are moved one after the other to the chill mould exit dimension and move the strip out.
- Method according to one of claims 1 to 4, characterised thereby that the reducing roller pair is driven.
- Plant for carrying out the method according to one of claims 1 to 5, which comprises a continuous casting chill mould (3) and at least one reducing roller pair (4) arranged downstream thereof as well as strip guide elements (5 to 9), drive rollers (10), a bending roller (11) and a drive straightening unit (12) which are connected thereto in strip withdrawal direction, characterised thereby that strip guide grids (5) are arranged directly downstream of the reducing roller pair (4) and the adjoining strip guide elements are constructed as strip guide rollers (6 or 7) mounted to be adjustable in segments.
- Plant according to claim 6, characterised thereby that the reducing rollers (4) and the bending roller (11) are hydraulically regulated in position.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4338805 | 1993-11-12 | ||
| DE4338805A DE4338805C2 (en) | 1993-11-12 | 1993-11-12 | Method and device for operating a continuous caster |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0662357A1 EP0662357A1 (en) | 1995-07-12 |
| EP0662357B1 true EP0662357B1 (en) | 1997-05-28 |
Family
ID=6502524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94117306A Expired - Lifetime EP0662357B1 (en) | 1993-11-12 | 1994-11-03 | Method of and device for operating a continuous casting installation |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5511606A (en) |
| EP (1) | EP0662357B1 (en) |
| AT (1) | ATE153571T1 (en) |
| DE (2) | DE4338805C2 (en) |
| ES (1) | ES2102120T3 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4057118B2 (en) * | 1997-12-17 | 2008-03-05 | エス・エム・エス・デマーク・アクチエンゲゼルシャフト | Method for producing thin slabs in a continuous casting facility and continuous casting facility for carrying out this method |
| DE19809807C2 (en) * | 1998-03-09 | 2003-03-27 | Sms Demag Ag | Setting process for a roller segment of a continuous caster |
| DE19933635A1 (en) | 1999-07-17 | 2001-01-18 | Sms Demag Ag | Method and device for changing the format thickness of the cast strand of a continuous caster in a continuous casting operation |
| ES2258438T3 (en) * | 1999-12-15 | 2006-09-01 | Sms Demag Ag | PROCEDURE FOR THE MODIFICATION OF THE FORMAT OF A CONTINUOUS COLADA BELOW THE COQUILLA OF A INSTALLATION OF CONTINUOUS COLADA FOUNDATION. |
| DE10011689A1 (en) * | 2000-03-10 | 2001-09-13 | Sms Demag Ag | Process for the continuous casting of slabs and in particular thin slabs |
| ITUD20010058A1 (en) * | 2001-03-26 | 2002-09-26 | Danieli Off Mecc | CUTTING PROCEDURE OF A TAPE IN THE CASTING PHASE |
| DE102004002783A1 (en) * | 2004-01-20 | 2005-08-04 | Sms Demag Ag | Method and device for determining the position of the sump tip in the casting strand in the continuous casting of liquid metals, in particular of liquid steel materials |
| DE102006048511A1 (en) * | 2006-10-13 | 2008-04-17 | Sms Demag Ag | Strand guiding device and method for its operation |
| RU2643003C1 (en) * | 2013-12-26 | 2018-01-29 | Поско | Device and method of continuous casting and steel sheet rolling |
| KR101736574B1 (en) | 2015-06-04 | 2017-05-17 | 주식회사 포스코 | Solidifying apparatus |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62137152A (en) * | 1985-12-12 | 1987-06-20 | Kawasaki Steel Corp | Pour starting apparatus for twin belt type continuous casting machine |
| ES2032620T3 (en) * | 1987-04-13 | 1993-02-16 | Thyssen Stahl Aktiengesellschaft | INSTALLATION FOR THE MANUFACTURE OF A STEEL TAPE WITH A THICKNESS OF 2 TO 25 MM THROUGH FORMING OF A CAST STEEL BAR. |
| EP0535368B1 (en) * | 1991-09-19 | 1996-06-05 | Sms Schloemann-Siemag Aktiengesellschaft | Method and apparatus for continuous casting of metal strand |
| IT1252847B (en) * | 1991-10-31 | 1995-06-28 | Danieli Off Mecc | CONTROLLED PRE-LAMINATION GROUP FOR THIN SLABS OUT OF CONTINUOUS CASTING |
| JP3007941B2 (en) * | 1991-11-21 | 2000-02-14 | 石川島播磨重工業株式会社 | Metal strip casting method |
-
1993
- 1993-11-12 DE DE4338805A patent/DE4338805C2/en not_active Expired - Fee Related
-
1994
- 1994-11-03 DE DE59402911T patent/DE59402911D1/en not_active Expired - Lifetime
- 1994-11-03 EP EP94117306A patent/EP0662357B1/en not_active Expired - Lifetime
- 1994-11-03 AT AT94117306T patent/ATE153571T1/en not_active IP Right Cessation
- 1994-11-03 ES ES94117306T patent/ES2102120T3/en not_active Expired - Lifetime
- 1994-11-14 US US08/339,145 patent/US5511606A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| ATE153571T1 (en) | 1997-06-15 |
| ES2102120T3 (en) | 1997-07-16 |
| DE4338805A1 (en) | 1995-05-18 |
| US5511606A (en) | 1996-04-30 |
| DE59402911D1 (en) | 1997-07-03 |
| EP0662357A1 (en) | 1995-07-12 |
| DE4338805C2 (en) | 1995-10-26 |
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