EP1385656B1 - Method for continuously casting ingots, slabs or thin slabs - Google Patents
Method for continuously casting ingots, slabs or thin slabs Download PDFInfo
- Publication number
- EP1385656B1 EP1385656B1 EP02769128A EP02769128A EP1385656B1 EP 1385656 B1 EP1385656 B1 EP 1385656B1 EP 02769128 A EP02769128 A EP 02769128A EP 02769128 A EP02769128 A EP 02769128A EP 1385656 B1 EP1385656 B1 EP 1385656B1
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- thickness reduction
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- 238000005266 casting Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims description 14
- 230000009467 reduction Effects 0.000 claims abstract description 34
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 239000007921 spray Substances 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 12
- 238000009749 continuous casting Methods 0.000 claims description 10
- 230000006978 adaptation Effects 0.000 claims description 6
- 239000007791 liquid phase Substances 0.000 claims 2
- 230000001105 regulatory effect Effects 0.000 claims 2
- 238000007711 solidification Methods 0.000 description 6
- 230000008023 solidification Effects 0.000 description 6
- 230000006872 improvement Effects 0.000 description 5
- 239000000155 melt Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
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
-
- 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 for the continuous casting of blocks, slabs or thin slabs in a continuous casting, the below a mold in mutually adjustable strand guide segments having acted example of weg- or position-controlled hydraulic cylinders roller pairs, wherein the casting strand by conically hiring at least one of its strand guide segments is reduced in thickness up to the sump tip soft reduction distance in the thickness and is subjected in the region of its liquid core between the mold and the soft reduction path (SR route) by at least one pair of rollers of a format thickness reduction.
- SR route soft reduction path
- the soft reduction process In continuous casting plants for slabs, the soft reduction process (SR process) is used to reduce core porosity and core segregation.
- the soft reduction is preferably carried out in the straightener area.
- Prerequisite for an improvement in the internal structural quality is that the final solidification of the strand in the conically employed soft reduction (SR route) takes place.
- a final solidification in front of or behind the SR line not only leads to no improvement in the interior quality, but occasionally to a deterioration.
- the conical roller adjustment of the strand guide segments is carried out either by a fixed setting by means of hydraulic cylinders and spacers, or by means of flexible employment, for example via position-controlled hydraulic cylinder.
- the so-called operating window of the continuous casting plant for example the adaptation of the casting speed and other casting parameters, the intensity of the spray cooling or the steel quality, is predetermined by the number of SR roller pairs and the type of employment. As the number of reels increases, the operating window can be increased. However, this increase is out of all proportion to the extra costs this entails. Furthermore, influencing the sump tip position by the spray cooling is only possible to a limited extent.
- the strand passes through a soft-reduction route, at the entrance he is not solidified, but at the end he should be solidified, what u. a. the casting speed is an essential operating parameter.
- a reduction in thickness for example for thin slabs, between 0.5 and 3 mm per meter of casting length is carried out.
- the pairs of rolls of individual segments beyond the shrinkage behavior of the strand are set narrower in the soft reduction section, in order to achieve an improvement in the strand internal quality in the region of the solidification by structural compaction.
- EP 0 834 364 A1 describes a method and an apparatus for high-speed continuous casting plants with a strand thickness reduction during solidification, wherein after the so-called casting rolling the strand cross section is reduced linearly over a minimum length of the strand guide immediately under the mold, with subsequent further strand production on the Remaining strand guide, the "soft reduction", until just before the final solidification or sump tip.
- the strand cross-section reduction is set so that a critical deformation of the strand shell, taking into account the high casting speed and steel grade is not exceeded.
- EP 0 177 796 B1 discloses a method for guiding and straightening a cast strand in the straightening and outfeed area of a continuous sheet casting plant, wherein oppositely arranged rolls are held by a spring force against the ferrostatic pressure of the cast strand in a distance which can be adapted to the casting process.
- a G umanstrang Scheme increased strength is tracked and reduced in its passage between opposite rollers, the respective spring force by a small drag.
- the slabs or blocks produced in continuous casting plants according to the aforementioned documents serve as starting material for rolling mill products for producing sheet metal or strip.
- the invention has for its object to achieve an adaptation or enlargement of the operating window of a continuous casting to changing casting parameters and to obtain a comparatively constant optimal structure in the cast by influencing the silt peak location.
- the format thickness is reduced in such a way that the position of the sump tip in the SR section is kept practically constant. This is in a large casting speed range with low mechanical engineering Expense ensures a consistently good quality of the cast strand.
- the process ausgestaltend is provided that arrangement and / or employment of the roller pairs for the format thickness reduction in the region of the liquid core of the cast strand are determined in accordance with the G confusequerrough or format cross section of the cast strand.
- the method according to the invention provides that the thickness reduction is carried out immediately before the SR section.
- FIG. 1 shows a purely schematic representation of a strand guide below a mold with a configuration according to the invention and with a soft reduction path SR.
- the sketch-like representation of the strand 5 below the melt inlet 6 in the mold 1 shows a first approach of a forming strand shell.
- the strand 5 is subjected to a size reduction in the region of its liquid core 7 between the mold 1 and the soft reduction section SR by at least one pair of rollers 4, 4 '.
- the reduction in size by the pairs of rollers 4, 4 ' is followed by a strand guide segment 2.2 for parallel strand guidance of the cast strand 5.
- the pairs of rollers 4, 4' are each acted upon by displacement or position-controlled, not shown in detail hydraulic cylinders, so that they the hydrostatic pressures of the melt. 8 overcome and thereby a local format reduction or thickness reduction in the strand 5 z. B. 10 mm / m in the casting direction before the soft reduction path SR with a thickness reduction of, for example, 1 mm / m cause.
- another strand guide segment 2.3 for parallel strand guidance is arranged.
- the format dimension is always adjusted so that the sump tip 9 largely independent of the aforementioned G discernparametern in a section of the SR track is, to the required Improvements in the internal quality of the cast strand leads.
- the format thickness is reduced so that the position of the sump tip 9 is kept practically constant in the SR route. This ensures a consistently good internal quality of the cast product in a large casting speed range with low mechanical complexity.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Silicon Compounds (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Stranggießen von Blöcken, Brammen oder von Dünnbrammen in einer Stranggießanlage, die unterhalb einer Kokille im gegenseitigen Abstand einstellbare Strangführungssegmente mit beispielsweise von weg- bzw. positionsgeregelten Hydraulikzylindern beaufschlagbaren Rollenpaaren aufweist, wobei der Gießstrang durch konisches Anstellen mindestens eines seiner Strangführungssegmente in einer bis zur Sumpfspitze reichenden Soft-Reduktions-Strecke in der Dicke reduziert wird und im Bereich seines flüssigen Kerns zwischen Kokille und der Soft-Reduktions-Strecke (SR-Strecke) durch wenigstens ein Rollenpaar einer Formatdickenreduktion unterworfen wird.The invention relates to a method for the continuous casting of blocks, slabs or thin slabs in a continuous casting, the below a mold in mutually adjustable strand guide segments having acted example of weg- or position-controlled hydraulic cylinders roller pairs, wherein the casting strand by conically hiring at least one of its strand guide segments is reduced in thickness up to the sump tip soft reduction distance in the thickness and is subjected in the region of its liquid core between the mold and the soft reduction path (SR route) by at least one pair of rollers of a format thickness reduction.
Bei Stranggießanlagen für Brammen wird zur Reduktion der Kernporosität und der Kemseigerung unter anderem das Soft-Reduktion-Verfahren (SR-Verfahren) eingesetzt.In continuous casting plants for slabs, the soft reduction process (SR process) is used to reduce core porosity and core segregation.
Bei Blockanlagen erfolgt die Soft-Reduktion vorzugsweise im Richttreiberbereich. Voraussetzung für eine Verbesserung der inneren Gefügequalität ist, dass die Enderstarrung des Stranges in der konisch angestellten Soft-Reduktion (SR-Strecke) erfolgt. Eine Enderstarrung vor oder hinter der SR-Strecke führt nicht nur zu keiner Verbesserung der Innenqualität, sondern fallweise zu einer Verschlechterung.In block systems, the soft reduction is preferably carried out in the straightener area. Prerequisite for an improvement in the internal structural quality is that the final solidification of the strand in the conically employed soft reduction (SR route) takes place. A final solidification in front of or behind the SR line not only leads to no improvement in the interior quality, but occasionally to a deterioration.
Die konische Rollenanstellung der Strangführungssegmente erfolgt entweder durch eine feste Einstellung mittels Hydraulikzylindern und Distanzstücken, oder mittels flexibler Anstellung, beispielsweise über positionsgeregelte Hydraulikzylinder.The conical roller adjustment of the strand guide segments is carried out either by a fixed setting by means of hydraulic cylinders and spacers, or by means of flexible employment, for example via position-controlled hydraulic cylinder.
Das sogenannte Betriebsfenster der Stranggießanlage, beispielsweise die Anpassung der Gießgeschwindigkeit sowie anderer Gießparameter, die Intensität der Spritzkühlung bzw. die Stahlqualität, ist durch die Anzahl der SR-Rollenpaare und die Art der Anstellung vorgegeben. Mit zunehmender Rollenzahl kann, das Betriebsfenster vergrößert werden. Diese Vergrößerung steht jedoch in keinem Verhältnis zu den dadurch verursachten Mehrkosten. Weiterhin ist auch eine Beeinflussung der Sumpfspitzenlage durch die Spritzkühlung nur eingeschränkt möglich.The so-called operating window of the continuous casting plant, for example the adaptation of the casting speed and other casting parameters, the intensity of the spray cooling or the steel quality, is predetermined by the number of SR roller pairs and the type of employment. As the number of reels increases, the operating window can be increased. However, this increase is out of all proportion to the extra costs this entails. Furthermore, influencing the sump tip position by the spray cooling is only possible to a limited extent.
Bei einem bekannten Verfahren gemäß der DE 41 38 740 A1, durchläuft der Strang eine Soft-Reduktions-Strecke, bei deren Eintritt er noch nicht durcherstarrt ist, an deren Ende er jedoch durcherstarrt sein soll, wofür u. a. die Gießgeschwindigkeit einen wesentlichen Betriebsparameter darstellt. Im Bereich der Enderstarrung wird dabei eine Dickenreduktion, beispielsweise für Dünhbrammen, zwischen 0,5 und 3 mm pro Meter Gießlänge durchgeführt. Hierfür werden in der Soft-Reduktions-Strecke die Rollenpaare einzelner Segmente über das Schrumpfverhalten des Stranges hinausgehend enger eingestellt, um im Bereich der Resterstarrung durch Gefügeverdichtung eine Verbesserung der Strang-Innenqualität zu erzielen.In a known method according to DE 41 38 740 A1, the strand passes through a soft-reduction route, at the entrance he is not solidified, but at the end he should be solidified, what u. a. the casting speed is an essential operating parameter. In the area of final solidification, a reduction in thickness, for example for thin slabs, between 0.5 and 3 mm per meter of casting length is carried out. For this purpose, the pairs of rolls of individual segments beyond the shrinkage behavior of the strand are set narrower in the soft reduction section, in order to achieve an improvement in the strand internal quality in the region of the solidification by structural compaction.
Die EP 0 834 364 A1 beschreibt ein Verfahren und eine Vorrichtung für Hochgeschwindigkeits-Stranggießanlagen mit einer Strangdickenreduktion während der Erstarrung, wobei nach dem sogenannten Gießwalzen der Strangquerschnitt linear über eine Mindestlänge der Strangführung unmittelbar unter der Kokille reduziert wird, mit sich anschließender weiterer Strangreduktion über die restliche Strangführung, der "Soft-Reduktion", bis unmittelbar vor der Enderstarrung bzw. Sumpfspitze. Durch diese verfahrenstechnische Maßnahme wird die Strangquerschnittsreduktion so vorgegeben, dass eine kritische Deformation der Strangschale unter Berücksichtigung der hohen Gießgeschwindigkeit und Stahlgüte nicht überschritten wird.EP 0 834 364 A1 describes a method and an apparatus for high-speed continuous casting plants with a strand thickness reduction during solidification, wherein after the so-called casting rolling the strand cross section is reduced linearly over a minimum length of the strand guide immediately under the mold, with subsequent further strand production on the Remaining strand guide, the "soft reduction", until just before the final solidification or sump tip. By this procedural measure, the strand cross-section reduction is set so that a critical deformation of the strand shell, taking into account the high casting speed and steel grade is not exceeded.
Die EP 0 177 796 B1 offenbart ein Verfahren zum Führen und Richten eines Gießstranges im Richt- und Auslaufbereich einer Bogenstranggießanlage, wobei gegenüberliegend angeordnete Rollen von einer Federkraft gegen den ferrostatischen Druck des Gießstranges in einem dem Gießverfahren anpassbaren Abstand gehalten werden. Dabei wird ein Gießstrangbereich erhöhter Festigkeit wegverfolgt und bei dessen Durchlauf zwischen gegenüberliegenden Rollen die jeweilige Federkraft durch eine geringe Gegenkraft reduziert.EP 0 177 796 B1 discloses a method for guiding and straightening a cast strand in the straightening and outfeed area of a continuous sheet casting plant, wherein oppositely arranged rolls are held by a spring force against the ferrostatic pressure of the cast strand in a distance which can be adapted to the casting process. Here, a Gießstrangbereich increased strength is tracked and reduced in its passage between opposite rollers, the respective spring force by a small drag.
Die in Stranggießanlagen entsprechend den vorgenannten Dokumenten hergestellten Brammen oder Blöcke dienen als Ausgangsmaterial für Walzwerksprodukte zum Erzeugen von Blechen oder Bändern.The slabs or blocks produced in continuous casting plants according to the aforementioned documents serve as starting material for rolling mill products for producing sheet metal or strip.
Der Erfindung liegt die Aufgabe zugrunde, eine Anpassung bzw. Vergrößerung des Betriebsfensters einer Stranggießanlage an sich ändernde Gießparameter zu erzielen und durch Beeinflussung der Sumpfspitzenlage ein vergleichsweise gleichbleibend optimales Gefüge im Gussstrang zu erhalten.The invention has for its object to achieve an adaptation or enlargement of the operating window of a continuous casting to changing casting parameters and to obtain a comparatively constant optimal structure in the cast by influencing the silt peak location.
Zur Lösung der Aufgabe wird bei einem Verfahren der im Oberbegriff von Anspruch 1 genannten Art mit der Erfindung vorgeschlagen, dass durch die Anzahl der Rollenpaare und ihre mehr oder weniger enge gegenseitige Anstellung im Bereich des flüssigen Kerns des Gießstranges eine flexible Anpassung des Gießprozesses an die Gießgeschwindigkeit vorgenommen wird und dabei die Formatdickenreduktion des Gießstranges mit flüssigem Kern so eingestellt wird, dass unabhängig von Stahlqualität, Intensität der Spritzkühlung und der Gießgeschwindigkeit, die Lage der Sumpfspitze in der SR-Strecke annähernd konstant gehalten wird.To solve the problem, in a method referred to in the preamble of claim 1 is proposed with the invention that by the number of pairs of rollers and their more or less close mutual employment in the liquid core of the casting a flexible adaptation of the casting process to the casting speed is made while the format thickness reduction of the casting strand with liquid core is adjusted so that regardless of steel quality, intensity of spray cooling and the casting speed, the position of the sump tip is kept approximately constant in the SR route.
Hierbei wird trotz zunehmender Gießgeschwindigkeit und/oder geänderter Spritzkühlung beispielsweise die Formatdicke derart reduziert, dass die Lage die Sumpfspitze in der SR-Strecke praktisch konstant gehalten wird. Damit ist in einem großen Gießgeschwindigkeitsbereich bei geringem maschinentechnischem Aufwand eine gleichbleibend gute Innenqualität des Gießstranges gewährleistet.In this case, for example, despite the increasing casting speed and / or changed spray cooling, the format thickness is reduced in such a way that the position of the sump tip in the SR section is kept practically constant. This is in a large casting speed range with low mechanical engineering Expense ensures a consistently good quality of the cast strand.
Damit wird trotz sich ändernder Betriebsparameter während des Gießprozesses ein gleichbleibend optimales Gefüge des gegossenen Stranges erzielt und eine unnötig erhöhte Belastung von Rollen und ihren Lagerungen innerhalb der Strangführung vermieden.Thus, despite changing operating parameters during the casting process, a consistently optimal structure of the cast strand is achieved and avoided an unnecessarily increased burden of roles and their bearings within the strand guide.
Das Verfahren ausgestaltend ist vorgesehen, dass Anordnung und/oder Anstellung der Rollenpaare für die Formatdickenreduktion im Bereich des flüssigen Kems des Gussstranges nach Maßgabe vom Gießquerschnitt bzw. Formatquerschnitt des Gießstranges bestimmt werden.The process ausgestaltend is provided that arrangement and / or employment of the roller pairs for the format thickness reduction in the region of the liquid core of the cast strand are determined in accordance with the Gießquerschnitt or format cross section of the cast strand.
Und schließlich sieht das erfindungsgemäße Verfahren vor, dass die Dickenreduzierung unmittelbar vor der SR-Strecke vorgenommen wird.Finally, the method according to the invention provides that the thickness reduction is carried out immediately before the SR section.
Damit wird eine Anpassung bzw. Vergrößerung des Betriebsfensters der Stranggießanlage an sich ändernde Gießparameter kostengünstig erreicht, und insbesondere wird eine Beeinflussung der Sumpfspitzenlage weitestgehend unabhängig von den Gießparametern in der Weise gewährieistet, dass die Sumpfspitze stets in einem Abschnitt der SR-Strecke liegt, der zu der geforderten Verbesserung der Innenqualität des Gießstranges führt. Damit ist in einem großen Gießgeschwindigkeitsbereich bei geringem maschinentechnischen Aufwand ein gleichbleibend gutes Gussstranggefüge gewährleistet.Thus, an adaptation or enlargement of the operating window of the continuous casting to changing casting parameters is achieved cost-effectively, and in particular an influence of the silt peak position largely independent of the Gießparametern guaranteed in such a way that the sump tip is always in a section of the SR route, the the required improvement in the internal quality of the cast strand leads. This ensures a consistently good cast strand structure in a large casting speed range with low mechanical complexity.
Einzelheiten, Merkmale und Vorteile der Erfindung ergeben sich aus der nachstehenden Erläuterung eines in der Zeichnung schematisch dargestellten Ausführungsbeispieles.Details, features and advantages of the invention will become apparent from the following explanation of an embodiment schematically illustrated in the drawing.
Die Figur 1 zeigt in rein schematischer Darstellung eine Strangführung unterhalb einer Kokille mit einer Ausgestaltung nach der Erfindung sowie mit einer Soft-Reduktions-Strecke SR.1 shows a purely schematic representation of a strand guide below a mold with a configuration according to the invention and with a soft reduction path SR.
Im Anlagenteil der Strangführung gemäß Figur 1 befindet sich unterhalb der Kokille ein erstes Strangführungssegment 2.1 zur parallelen Strangführung.In the plant part of the strand guide according to Figure 1 is located below the mold, a first strand guide segment 2.1 for parallel strand guide.
Die skizzenmäßige Darstellung des Stranges 5 unterhalb des Schmelzeneinlaufes 6 in die Kokille 1 zeigt einen ersten Ansatz einer sich bildenden Strangschale 8.The sketch-like representation of the strand 5 below the melt inlet 6 in the mold 1 shows a first approach of a forming strand shell. 8
Erfindungsgemäß wird der Strang 5 im Bereich seines flüssigen Kerns 7 zwischen der Kokille 1 und der Soft-Reduktions-Strecke SR durch wenigstens ein Rollenpaar 4, 4' einer Formatreduzierung unterworfen. Der Formatreduzierung durch die Rollenpaare 4, 4' folgt ein Strangführungssegment 2.2 zur parallelen Strangführung des Gießstranges 5. Die Rollenpaare 4, 4' sind jeweils von weg- bzw. positionsgeregelten, nicht näher gezeigten Hydraulikzylindern beaufschlagt, so dass sie die hydrostatischen Drücke der Schmelze 8 überwinden und dadurch eine örtliche Formatreduzierung bzw. Dickenreduktion im Strang 5 z. B. 10 mm/m in Gießrichtung vor der Soft-Reduktions-Strecke SR mit einer Dickenreduzierung von beispielsweise 1 mm/m verursachen. In Gießrichtung unterhalb der Soft-Reduktions-Strecke ist ein weiteres Strangführungssegmenf 2.3 zur parallelen Strangführung angeordnet.According to the invention, the strand 5 is subjected to a size reduction in the region of its liquid core 7 between the mold 1 and the soft reduction section SR by at least one pair of rollers 4, 4 '. The reduction in size by the pairs of rollers 4, 4 'is followed by a strand guide segment 2.2 for parallel strand guidance of the cast strand 5. The pairs of rollers 4, 4' are each acted upon by displacement or position-controlled, not shown in detail hydraulic cylinders, so that they the hydrostatic pressures of the melt. 8 overcome and thereby a local format reduction or thickness reduction in the strand 5 z. B. 10 mm / m in the casting direction before the soft reduction path SR with a thickness reduction of, for example, 1 mm / m cause. In the casting direction below the soft reduction section another strand guide segment 2.3 for parallel strand guidance is arranged.
Anzahl und Anstellung der Rollenpaare 4, 4' im Bereich des flüssigen Kerns 7 des Gießstranges 5 erlauben eine flexible Anpassung des Gießprozesses an die Gießgeschwindigkeit bzw. eine Änderung derselben.Number and employment of the roller pairs 4, 4 'in the region of the liquid core 7 of the cast strand 5 allow a flexible adaptation of the casting process to the casting speed or a change thereof.
Durch die Dickenreduzierung des Stranges 5 mit flüssigem Kern wird in Abhängigkeit von den Gießparametern wie Gießgeschwindigkeit, Stahlqualität, Gießtemperatur die Formatabmessung stets so eingestellt, dass die Sumpfspitze 9 weitestgehend unabhängig von den vorgenannten Gießparametern in einem Abschnitt der SR-Strecke liegt, der zu den geforderten Verbesserungen der Innenqualität des Gießstranges führt. Bei Zunehmender Gießgeschwindigkeit oder reduzierter Spritzkühlung wird beispielsweise die Formatdicke so reduziert, dass die Lage der Sumpfspitze 9 in der SR-Strecke praktisch konstant gehalten wird. Damit ist in einem großen Gießgeschwindigkeitsbereich bei geringem maschinentechnischen Aufwand eine gleichbleibend gute Innenqualität des Gußproduktes gewährleistet.Due to the thickness reduction of the strand 5 with liquid core depending on the casting parameters such as casting speed, steel quality, casting temperature, the format dimension is always adjusted so that the sump tip 9 largely independent of the aforementioned Gießparametern in a section of the SR track is, to the required Improvements in the internal quality of the cast strand leads. For example, with increasing casting speed or reduced spray cooling, the format thickness is reduced so that the position of the sump tip 9 is kept practically constant in the SR route. This ensures a consistently good internal quality of the cast product in a large casting speed range with low mechanical complexity.
Claims (5)
- Method for the continuous casting of ingots, slabs or thin slabs in a continuous casting plant which comprises, below a mould (1), strip guide segments (2.1 to 2.n), which are settable at a mutual spacing, with roller pairs (4, 4') able to be acted upon by, for example, hydraulic cylinders regulable in travel or position, wherein the cast strip (5) in the case of a forming strip skin (8) is reduced in thickness by conical adjustment of at least one of its strip guide segments (2.1 to 2.n) in a soft reduction path (SR path) reaching up to the liquid phase end and is subjected to a format thickness reduction in the region of its liquid core (7) between mould (1) and the soft reduction path (SR path) by at least one roller pair (4, 4'), characterised in that a flexible adaptation of the casting process to the casting speed is undertaken through the number of roller pairs (4, 4') and the mutual adjustment thereof with greater or lesser tightness in the region of the liquid core (7) and in that case the format thickness reduction of the cast strip (5) with liquid core (7) is so set that the position of the liquid phase end (9) in the SR path is kept approximately constant independently of steel quality, intensity of spray cooling and the casting speed.
- Method according to claim 1, characterised in that the arrangement and/or adjustment of the roller pairs (4, 4') for the format thickness reduction in the region of the liquid core (7) of the cast strip (5) is or are determined in accordance with the casting cross-section or format cross-section of the cast strip.
- Method according to claim 1 or 2, characterised in that the format thickness reduction is undertaken directly ahead of the SR path.
- Method according to one or more of claims 1 to 3, characterised in that the rollers (4) for the format thickness reduction of the cast strip (5) in the SR path are adjusted in position-regulated manner.
- Method according to one or more of claims 1 to 4, characterised in that the rollers (4) for format thickness reduction of the cast strip (5) in the region of the liquid core (7) thereof are adjusted in position-regulated manner.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10122118 | 2001-05-07 | ||
| DE10122118A DE10122118A1 (en) | 2001-05-07 | 2001-05-07 | Method and device for the continuous casting of blocks, slabs and thin slabs |
| PCT/EP2002/004801 WO2002090019A1 (en) | 2001-05-07 | 2002-05-02 | Method and device for continuously casting ingots, slabs or thin slabs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1385656A1 EP1385656A1 (en) | 2004-02-04 |
| EP1385656B1 true EP1385656B1 (en) | 2004-12-29 |
Family
ID=7683887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02769128A Expired - Lifetime EP1385656B1 (en) | 2001-05-07 | 2002-05-02 | Method for continuously casting ingots, slabs or thin slabs |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US7025118B2 (en) |
| EP (1) | EP1385656B1 (en) |
| JP (1) | JP4846969B2 (en) |
| KR (1) | KR100851899B1 (en) |
| CN (1) | CN1287932C (en) |
| AT (1) | ATE285861T1 (en) |
| CA (1) | CA2446222C (en) |
| DE (2) | DE10122118A1 (en) |
| ES (1) | ES2233864T3 (en) |
| RU (1) | RU2287401C2 (en) |
| WO (1) | WO2002090019A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| PL2543454T3 (en) * | 2011-07-08 | 2020-02-28 | Primetals Technologies Germany Gmbh | Process and apparatus for the manufacturing of long steel products in a continuous casting |
| RU2494834C1 (en) * | 2012-06-27 | 2013-10-10 | Открытое акционерное общество "Магнитогорский металлургический комбинат" | Method of producing continuously-cast steel billets |
| BR112015008906B1 (en) * | 2014-12-24 | 2021-06-22 | Jfe Steel Corporation | CONTINUOUS STEEL CASTING METHOD |
| BR102015009492B1 (en) * | 2015-01-30 | 2021-05-04 | Jfe Steel Corporation | continuous steel casting method |
| DE102017219464A1 (en) * | 2017-10-30 | 2019-05-02 | Sms Group Gmbh | Continuous casting plant with single roll adjustment |
| CN109465415A (en) * | 2018-12-07 | 2019-03-15 | 东北大学 | Fan-shaped section roll array structure under a kind of double single-point weight in continuous casting and solidifying end |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4138740A1 (en) * | 1991-11-26 | 1993-05-27 | Schloemann Siemag Ag | METHOD AND DEVICE FOR CONTINUOUSLY casting slabs or blocks |
| AT401744B (en) | 1993-10-14 | 1996-11-25 | Voest Alpine Ind Anlagen | METHOD AND SYSTEM FOR CONTINUOUS CASTING |
| JP3008821B2 (en) * | 1994-07-29 | 2000-02-14 | 住友金属工業株式会社 | Continuous casting method and apparatus for thin slab |
| DE69615534T2 (en) * | 1995-10-18 | 2002-05-02 | Sumitomo Metal Industries, Ltd. | CONTINUOUS CASTING METHOD AND PLANT |
| DE19639297C2 (en) * | 1996-09-25 | 2000-02-03 | Schloemann Siemag Ag | Method and device for high-speed continuous casting plants with a reduction in strand thickness during solidification |
| DE19720768C1 (en) * | 1997-05-07 | 1999-01-14 | Mannesmann Ag | Method and device for producing steel slabs |
| DE19903928A1 (en) * | 1998-11-06 | 2000-05-11 | Schloemann Siemag Ag | Production of continuously cast slabs comprises using a solidifying cord shell in a cord guide extending from the mold to the final solidification point |
| 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 |
| DE10011689A1 (en) * | 2000-03-10 | 2001-09-13 | Sms Demag Ag | Process for the continuous casting of slabs and in particular thin slabs |
-
2001
- 2001-05-07 DE DE10122118A patent/DE10122118A1/en not_active Withdrawn
-
2002
- 2002-05-02 ES ES02769128T patent/ES2233864T3/en not_active Expired - Lifetime
- 2002-05-02 AT AT02769128T patent/ATE285861T1/en active
- 2002-05-02 RU RU2003135621/02A patent/RU2287401C2/en active
- 2002-05-02 US US10/476,361 patent/US7025118B2/en not_active Expired - Lifetime
- 2002-05-02 DE DE50201906T patent/DE50201906D1/en not_active Expired - Lifetime
- 2002-05-02 CN CNB02809560XA patent/CN1287932C/en not_active Expired - Lifetime
- 2002-05-02 CA CA002446222A patent/CA2446222C/en not_active Expired - Fee Related
- 2002-05-02 EP EP02769128A patent/EP1385656B1/en not_active Expired - Lifetime
- 2002-05-02 JP JP2002587137A patent/JP4846969B2/en not_active Expired - Lifetime
- 2002-05-02 KR KR1020037013785A patent/KR100851899B1/en active IP Right Grant
- 2002-05-02 WO PCT/EP2002/004801 patent/WO2002090019A1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| ATE285861T1 (en) | 2005-01-15 |
| CA2446222C (en) | 2009-07-14 |
| KR100851899B1 (en) | 2008-08-13 |
| ES2233864T3 (en) | 2005-06-16 |
| DE50201906D1 (en) | 2005-02-03 |
| KR20030090778A (en) | 2003-11-28 |
| RU2003135621A (en) | 2005-05-27 |
| WO2002090019A1 (en) | 2002-11-14 |
| RU2287401C2 (en) | 2006-11-20 |
| JP4846969B2 (en) | 2011-12-28 |
| EP1385656A1 (en) | 2004-02-04 |
| CA2446222A1 (en) | 2002-11-14 |
| US20040129405A1 (en) | 2004-07-08 |
| US7025118B2 (en) | 2006-04-11 |
| CN1287932C (en) | 2006-12-06 |
| JP2004528987A (en) | 2004-09-24 |
| DE10122118A1 (en) | 2002-11-14 |
| CN1529643A (en) | 2004-09-15 |
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