EP1536900B1 - Verfahren und vorrichtung zum starten eines giessvorganges - Google Patents
Verfahren und vorrichtung zum starten eines giessvorganges Download PDFInfo
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- EP1536900B1 EP1536900B1 EP03798105A EP03798105A EP1536900B1 EP 1536900 B1 EP1536900 B1 EP 1536900B1 EP 03798105 A EP03798105 A EP 03798105A EP 03798105 A EP03798105 A EP 03798105A EP 1536900 B1 EP1536900 B1 EP 1536900B1
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- casting
- strip
- velocity
- rolls
- starting
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/161—Controlling or regulating processes or operations for automatic starting the casting process
Definitions
- the invention relates to a method for starting a casting process in one Zweiwalzeng screen appealing without application of a starter strand and a Apparatus for carrying out this method.
- a continuously cast metal strand of indeterminate length are essentially cooled molds with a continuous mold cavity used in which the input side introduced molten metal at least in Contact area with the mold cavity walls solidifies. On the output side, an im Essentially solidified metal strand withdrawn from the mold.
- a first filling of the mold cavity with molten metal perform, especially in predominantly vertical orientation of the Mold cavity a completely solidified initial piece must be achieved, so that the molten metal does not flow uncontrollably through the mold and out of it exit.
- the casting thickness of the metal strand to be produced, the solidification conditions and in the short residence time in the mold through the mold cavity walls dissipated amount of heat essential.
- a starter line for the special application in a two-roll caster is in EP-A 208 642 described.
- This starter train contains a starting head with two flanges formed by thin sheet metal strips, which on the lateral surfaces of the Casting wheels abut and so a space for receiving the incoming To form molten metal.
- JP-A 61-266159 discloses a starting method in which the two cooperating casting rolls before start of casting in a start position are brought, in which no casting gap is present and the casting rolls stand still. Immediately after the start of the melt supply and a first strand shell formation on the two lateral surfaces of the casting rolls they are on the Railgibilspalt (Band thickness) apart and the casting speed along a Start-up curve brought to operating casting speed.
- stationary casting rolls is very unreliable because of the actual casting level in the Melting space not to the narrowest cross-section between the casting rolls with necessary accuracy can be measured. It is therefore neither an increase in strength between the two casting rollers nor the degree of filling of the mold reasonable controllable.
- Object of the present invention is therefore the initially described To avoid disadvantages of the prior art and a method for starting a Casting in a two-roll caster and a device for To propose implementation of the method, wherein the passage of molten metal can be kept low by the casting gap and at the same time the inclination to Wedge formations and thickening at the beginning of the cast strip as possible is avoided. At the same time, a separation of a first piece of the cast Bandes, which does not meet the quality requirements of a continuous production of which subsequently under largely stationary operating conditions produced band can be achieved without mechanical separation for this purpose needed.
- the casting speed is always from the casting roll peripheral speed determined, since the formed and adhered to the G manwalzenmäntel strand bowls at that speed through the narrowest section between the casting rolls transported and interconnected.
- the start casting speed is a low casting speed at which because of the extended residence time of the forming strand shells in the Melting chamber an increased strand shell growth occurs and therefore the after below open casting gap can be bridged particularly fast.
- the banding casting speed is one in particular from the current one Liquid metal casting mirror and also of the solidification conditions and the due to the steel analysis required casting roll separation force dependent Casting speed, in which a band formation and the removal of the formed Bandes down and at the largely consistent Bandformungs claim can be met.
- dje continuous filling of the melting space with molten metal down to the level the operating casting level, wherein the banding casting speed with rising pouring mirror continuously increases.
- the start-casting speed is smaller chosen as half the operating casting speed, with the casting rolls usually rotate.
- the starting phase can also be used standing casting rolls are introduced so that the starting casting speed at Start of feeding molten metal is still 0 m / min and the casting rolls then accelerated rapidly.
- banding casting speed is regulated by the separation force occurring between the casting rolls.
- the between the separating force acting on the two casting rolls is at a given casting gap Measure for the strand shell thickness and the current solidification state in the narrowest Cross section between the casting rolls. It is higher, the further the solidification process has progressed in this area.
- the in the start phase mostly always rising metal bath levels, which have a significant influence on strand shell formation takes, is included here.
- the measured values can also be used to control the banding casting speed a bath level measurement and a separation force measurement used in combination become.
- the band-separating casting speed is to be understood as the casting speed. at the first part of the cast metal strip, which is under transient Casting conditions in the start phase of the casting process was generated and thus as Scrap material is to be considered, from the continuously following below largely stationary casting conditions generated metal strip is separated. This separation takes place according to a possible embodiment exclusively under the action of Dead weight of the narrowest cross section between the casting rolls leaving hanging down starting piece of the cast metal strip by tearing the same in the casting gap
- By increasing the casting speed on the Belt separation casting speed are the solidification conditions and thus the mechanical properties of the cast strip in the casting section, specifically By reducing the tensile strength, so changed that the tape in this Cross-section without additional mechanical measures breaks off.
- the separation of the cast metal strip at tape separation casting speed under the action of a force of gravity increased band pull, which is applied by a driver assembly, the arranged downstream of the casting gap of the Zweiwalzengit pleasing is.
- An improvement of the separation conditions can be achieved if the increase the casting speed on the belt separation casting speed a short-term Magnification of the casting thickness is superimposed by 5 to 40%.
- the belt separation casting speed is higher than the operation casting speed, preferably it is 5% to 40% higher than the operating casting speed.
- This tape release casting speed is set briefly as soon as approximate stationary casting conditions are reached. It is preferred that already a consistent strip quality is ensured.
- the belt separation casting speed is suitably set in the starting phase, when the molten metal in the Melting chamber has substantially reached the desired operating casting level.
- the proposed method allows the stationary casting operation within from 5 to 60 seconds after the beginning of the supply of molten metal in the melting space is reached.
- At least reference data of the instantaneous casting speed and the instantaneous molten metal level of the molten metal in the molten space and / or the instantaneous separation force between the casting rolls and / or the Gap width between the casting rolls and / or the strip thickness of the cast Metal strip continuously determined during the casting start and a computing unit be fed from these reference data, including a mathematical model for the starting process variables for the Casting speed, for the position of a Bandleitleaned and for the Transport speed of the cast metal strip in one Belt transport device generated and to the drive units of these facilities be transmitted.
- the separation conditions for the separation of the first piece of the cast metal strip in the casting cross section improved when out of the mathematical model based on current input data, such as Steel quality, operating casting thickness, temperature conditions, quality-related Solidification conditions, etc., in addition a manipulated variable for the distance positioning the two casting rolls to each other, in particular an increased starting casting thickness, is generated.
- the quality of the metal strip produced can generally and during the Casting process continuously optimized and adapted to changing operating conditions if the mathematical model is a metallurgical model for education a certain microstructure in the cast metal strip and / or for influencing the Includes geometry of the cast metal strip.
- Such equipped two-roll caster allows the takeover of current production data from the steelmaking process and their Joint processing with measurement data at the pouring device in one Computational model for optimizing the starting process.
- An appropriate sequence of the method according to the invention is also possible if instead of the continuous measurement of the level of the casting mirror in the melting space with a level measuring device alternatively a separating force measuring device for detection the instantaneous, essentially caused by the banding release force between the two casting rolls or a position-measuring device for determination the current gap width between the casting rolls or a measuring device for Determination of the instantaneous strip thickness is used.
- Each of these measurements delivers Reference data, which at least indirectly a mathematically writable Connection with the strand shell formation in the melt pool and thus with the Produce metal stranding in the narrowest cross section between the casting rolls and therefore, in a mathematical model for the calculation of manipulated variables can be used to time-minimized or optimized the boot process in terms of shape and trackability of the strip breaking edge perform.
- Another Improvement of the starting procedure can be achieved by combining at least two of these Measurement methods are achieved, the measurements being carried out simultaneously and in a correspondingly expanded mathematical model.
- the present method and associated two-roll caster is for the Casting of molten metals, preferably Fe-containing metal alloys, especially for steels.
- Fig.1 A Zweiwalzeng phonestrom with the implementation of the invention Method necessary facilities is shown schematically in Fig.1.
- she consists of two arranged in a horizontal plane at a distance from each other and with a not shown internal cooling equipped casting rolls 1, 2. These are in Shaft bearings 3, 4 rotatably supported and coupled with rotary actuators 5, 6, the one opposite rotation of the casting rolls 1, 2 to G confusewalzenachsen 1 ', 2' with a adjustable peripheral speed, which corresponds to the casting speed, enable.
- To determine the instantaneous casting speed is at least one of the casting rolls 1, 2 or the associated rotary drives 5, 6 or the Cast metal tape itself assigned a speed measuring device 34.
- One of the two casting rolls 2 is transverse to the casting roll axis 2 'in the horizontal plane.
- Level measuring device 16 is a continuous monitoring of Casting level.
- the arcuate trained Bandleit Vietnamese 22 is connected to a drive unit 25th connected, which allows the Bandleit Vietnamese 22 from a retracted position A in an operating position B and back to pivot.
- the tape guide is in the retracted position A and is after the separation of a first piece of the cast metal strip in the Operating position B pivots and can be there throughout the stationary Production process remain.
- a Scrap receiving carriage 26 arranged in which at best initially dripping Molten metal and the first section of the cast strip collected and at Demand can be removed.
- the scrap receiving trolley can also be designed without wheels. He can be inside a chamber surrounding the path of the cast metal strip from the Casting rolls to the first driver encloses, be positioned. Also, this must be first section of the cast strip does not necessarily directly into the Scrap receiving vehicles fall, but can also be fed to this indirectly.
- Further treatment facilities 28 refined and finally to bundles 29 wrapped and / or sliced into sheets.
- the further processing devices 28 can For example, from rolling stands, trimming devices, Surface treatment equipment, thermal treatment equipment various types, such as heaters, holding ovens, temperature compensation ovens, and Cooling sections are formed.
- the Zweiwalzengitinnate is equipped with a computing unit 36, which makes it possible to automatically perform the starting process in response to predetermined input variables and determined on the device current metrics.
- a computing unit 36 which makes it possible to automatically perform the starting process in response to predetermined input variables and determined on the device current metrics.
- optimal manipulated variables such as the start casting speed v gSt , the position of the belt guide , the drive speed of the belt transport device and possibly the starting casting thickness D St and other control variables are generated in the arithmetic unit and the starting process continuously controlled and supervised.
- Manipulated variables which are generated from the arithmetic unit 36 for carrying out the starting process, are based on measurement data from the casting plant that are currently collected and that directly or indirectly have a connection with the strand shell growth.
- Predestined for this purpose are the instantaneous level of the casting mirror 15, ie the level of the casting mirror in the melting space 11, which can be determined continuously by means of a level-measuring device 16.
- the release force F Tr between the two casting rolls 1, 2 represents a reaction force on the passed strand shells and also provides a reference value for the degree of solidification in the narrowest cross section between the casting rolls. It is to be determined with a separating force measuring device 30, which is associated with the casting roll bearings 3, 4 or incorporated in the G confusewalzenverstell issued 7.
- Another way to determine a reference size provides the instantaneous gap width G between the casting rolls, which is closely related to the release force F Tr , since a higher separation force causes increased radial deflection of the casting rolls 1, 2 from each other or their deformation.
- This can be measured directly by a position measuring device 31 on the casting rolls or indirectly via a strip thickness measuring device 32.
- the simultaneous measurement and processing of the measurement data of several of the measuring systems described minimizes the time required for the start of the system and in particular increases the quality of the strip breaking edge of the subsequent metal strip with regard to their geometry and their ability to be guided through the plant, as well as the quality of the product produced from the start of production.
- the V-shaped lines 37 illustrate this Transition from 100% melt to a mixing area with an increasing Solid fraction and the V-shaped line 38 illustrates the transition to 100% Solid content, thus the solidified strand part.
- Fig. 2b shows the changed Solidification conditions at a strip-separation casting speed, compared to the Operating casting speed is increased. That means the Circumferential speed of the casting rolls is increased. The cooling conditions were not changed. This will increase the available strand shell formation time in the Melting chamber and thus the strand shell growth is reduced, so that the fürerstarrungspraxis 39 shifts in the casting direction and in G confusequerites either still an increased proportion of liquid body portion is present and / or the average belt temperature is at least higher than at operating casting speed. In both cases, the tensile strength of the hanging down Metallband Culturees at the belt separation casting speed reduced so far that the metal strip breaks off under the action of its weight in the casting cross section.
- the casting speed is at such a high Belt separation casting speed increased and then immediately lowered again, that temporarily no separation force is measured.
- this short phase flows Molten metal because of the lack of connection between the two Strand bowls and under the effect of ferrostatic pressure in the room below the narrowest cross section between the casting rolls. This comes it locally to a bulging of the metal strip and a considerable Reheating of the near - surface band layers and under the influence of hanging down Bandeigenreferses for demolition.
- the G confusetikpractic h Gsp can be measured only after reaching a certain degree of filling, since the melt space is constricted due to the casting roll arrangement to G confusequerites toward funnel-shaped and in this very narrow range a level measurement is not technically feasible. After a period of about 5 to 15 seconds, which can be variably selected, the operating pouring level h Betr is reached and maintained at this level.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Description
- Einstellen einer Betriebs-Gießdicke und Rotieren der Gießwalzen mit einer Gießwalzen-Umfangsgeschwindigkeit, die einer gegenüber einer stationären Betriebs-Gießgeschwindigkeit verringerten Start-Gießgeschwindigkeit entspricht,
- Zuführen von Metallschmelze in einen von den rotierenden Gießwalzen und den an ihnen anliegenden Seitenplatten gebildeten Schmelzenraum und Ausbilden eines gegossenen Metallbandes mit im Wesentlichen gleichbleibendem, vorbestimmtem Querschnittsformat bei gleichzeitiger Erhöhung der Gießgeschwindigkeit auf eine Bandbildungs-Gießgeschwindigkeit,
- nachfolgendes Erhöhen der Gießgeschwindigkeit auf eine Bandtrenn-Gießgeschwindigkeit, die signifikant höher ist, als eine den aktuellen Durcherstarrungsbedingungen genügende Gießgeschwindigkeit und Abtrennen des bisher gegossenen Metallbandes,
- Einstellen der stationären Betriebs-Gießgeschwindigkeit,
- Umlenken des nachfolgenden gegossenen Metallbandes zu einer Bandtransporteinrichtung und Beginn eines stationären Gießbetriebes.
- dass den Gießwalzen eine Geschwindigkeitsmesseinrichtung zur Ermittlung der momentanen Gießgeschwindigkeit zugeordnet ist,
- dass dem Schmelzenraum eine Niveaumesseinrichtung zur Ermittlung der momentanen Gießspiegelhöhe der Metallschmelze zugeordnet ist,
- dass die Geschwindigkeitsmesseinrichtung und die Niveaumesseinrichtung durch Signalleitungen mit einer Recheneinheit verbunden sind und
- die Recheneinheit durch Signalleitungen mit dem Drehantrieb der Gießwalzen, mit einer Positionsstelleinrichtung der Bandleiteinrichtung und dem Antrieb einer Bandtransporteinrichtung verbunden ist. Die beiden Gießwalzen können auch mit einem gemeinsamen Drehantrieb unter Zwischenschaltung eines Verteilergetriebes gekoppelt sein.
- Fig. 1
- eine schematische Darstellung einer Zweiwalzengießeinrichtung zur Durchführung des erfindungsgemäßen Verfahrens,
- Fig.2a
- eine schematische Darstellung der Erstarrungsbedingungen im Gießspalt bei Betriebs-Gießgeschwindigkeit,
- Fig.2b
- eine schematische Darstellung der Erstarrungsbedingungen im Gießspalt bei Bandtrenn-Gießgeschwindigkeit,
- Fig. 3
- den Verlauf der Gießgeschwindigkeit, der Gießspaltweite, des Gießspiegelsignals und der Gießwalzen-Trennkraft während des Startens eines Gießvorganges für einen Stahl der Qualität AISI 304.
Claims (21)
- Verfahren zum Starten eines Gießvorganges in einer Zweiwalzengießeinrichtung ohne Anfahrstrang, gekennzeichnet durch folgende Schritte:Einstellen einer Betriebs-Gießdicke (D) und Rotieren der Gießwalzen (1, 2) mit einer Gießwalzen-Umfangsgeschwindigkeit, die einer gegenüber einer stationären Betriebs-Gießgeschwindigkeit (vgBetr) verringerten Start-Gießgeschwindigkeit (vgSt) entspricht,Zuführen von Metallschmelze (12) in einen von den rotierenden Gießwalzen (1, 2) und den an ihnen anliegenden Seitenplatten (8) gebildeten Schmelzenraum (11) und Ausbilden eines gegossenen Metallbandes (21) mit im Wesentlichen gleichbleibendem, vorbestimmtem Querschnittsformat bei gleichzeitiger Erhöhung der Gießgeschwindigkeit (vg) auf eine Bandbildungs-Gießgeschwindigkeit (vgBb),nachfolgendes Erhöhen der Gießgeschwindigkeit (vg) auf eine Bandtrenn-Gießgeschwindigkeit (vgTr), die signifikant höher ist, als eine den aktuellen Durcherstarrungsbedingungen genügende Gießgeschwindigkeit (vg) und Abtrennen des bisher gegossenen Metallbandes (21),Einstellen einer stationären Betriebs-Gießgeschwindigkeit (vgBetr),Umlenken des nachfolgenden gegossenen Metallbandes (21) zu einer Bandtransporteinrichtung (24) und Beginn des stationären Gießbetriebes.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Start-Gießgeschwindigkeit (vgSt) kleiner ist als die halbe Betriebs-Gießgeschwindigkeit (vgBetr).
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Start-Gießgeschwindigkeit (vgSt) weniger als etwa 12 m/min beträgt.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Start-Gießgeschwindigkeit (vgSt) bei Beginn des Zuführens von Metallschmelze noch 0 m/min beträgt und nachfolgend beschleunigt wird.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Bandbildungs-Gießgeschwindigkeit (vgBb) entsprechend einem messbaren Soll-Gießspiegel (hGsp) eingestellt wird.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Bandbildungs-Gießgeschwindigkeit (vgBb) im wesentlichen der stationären Betriebs-Gießgeschwindigkeit (vgBetr) entspricht.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Bandbildungs-Gießgeschwindigkeit (vgBb) in Abhängigkeit von der zwischen den Gießwalzen auftretenden Trennkraft (FTr) geregelt wird.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Bandtrenn-Gießgeschwindigkeit (vgTr) höher ist als die Bandbildungs-Gießgeschwindigkeit (vgBb) und/oder die Betriebs-Gießgeschwindigkeit (vgBetr).
- Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Bandtrenn-Gießgeschwindigkeit (vgTr) um 5 % bis 40 % höher ist als die Bandbildungs-Gießgeschwindigkeit (vgBb) und/oder die Betriebs-Gießgeschwindigkeit (vgBetr).
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Erhöhung der Gießgeschwindigkeit auf die Bandtrenn-Gießgeschwindigkeit (vgTr) eine kurzzeitige Vergrößerung der Gießdicke (D) um 5 bis 40 % überlagert wird.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Bandtrenn-Gießgeschwindigkeit (vgTr) eingestellt wird, sobald die Metallschmelze im Schmelzenraum (11) im wesentlichen den Soll-Betriebsgießspiegel (hGsp) erreicht hat.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Abtrennen des gegossenen Metallbandes bei Bandtrenn-Gießgeschwindigkeit (vgTr) durch Abreißen des gegossenen Bandes unter Wirkung des Eigengewichtes des Metallbandes im Gießspalt (18) zwischen den Gießwalzen (1, 2) erfolgt.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Abtrennen des gegossenen Metallbandes bei Bandtrenn-Gießgeschwindigkeit (vgTr) unter Einwirkung eines erhöhten Bandzuges erfolgt.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zumindest in einer Zeitspanne vor dem Erreichen des Soll-Betriebsgießspiegels (hgsp) im Schmelzenraum (11) die Gießgeschwindigkeit (vg) auf etwa die Betriebs-Gießgeschwindigkeit (vgBetr) gesteigert wird.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der stationäre Gießbetrieb innerhalb von 5 bis 60 sec nach erstmaliger Zufuhr der Metallschmelze in den Schmelzenraum (11) erreicht wird.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass bei Starten eines Gießvorganges zur Herstellung eines sehr dünnen Metallbandes eine gegenüber der Betriebs-Gießdicke (D) vergrößerte Start-Gießdicke (DSt) eingestellt wird und diese Start-Gießdicke frühestens nach Ausbilden eines gegossenen Metallbandes mit im Wesentlichen gleichbleibendem, vorbestimmtem Querschnittsformat auf die Betriebs-Gießdicke (D) zurückgeführt wird.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zumindest Referenzdaten der momentanen Gießgeschwindigkeit (vg) und der momentanen Gießspiegelhöhe der Metallschmelze und/oder der momentanen Trennkraft (FTr) zwischen den Gießwalzen und/oder der Spaltweite (G) zwischen den Gießwalzen und/oder der Banddicke des gegossenen Metallbandes während des Gießstartes kontinuierlich ermittelt und einer Recheneinheit (36) zugeführt werden und aus diesen Referenzdaten unter Einbeziehung eines mathematischen Modells für den Startvorgang Stellgrößen für die Gießgeschwindigkeit, für die Position einer Bandleiteinrichtung (22) und für die Transportgeschwindigkeit des gegossenen Metallbandes in einer Bandtransporteinrichtung (24) generiert und an die Antriebseinheiten (5, 6, 25, 27) dieser Einrichtungen übermittelt werden.
- Verfahren nach Anspruch 15, dadurch gekennzeichnet, dass aus dem mathematischen Modell zusätzlich eine Stellgröße für die Abstands-Positionierung der Gießwalzen (1, 2) zueinander, insbesondere eine Start-Gießdicke (DSt), generiert wird.
- Verfahren nach Anspruch 15 oder 16, dadurch gekennzeichnet, dass das mathematische Modell ein metallurgisches Modell zur Ausbildung eines bestimmten Gefüges im gegossenen Metallband und/oder zur Beeinflussung der Geometrie des gegossenen Metallbandes umfasst.
- Zweiwalzengießeinrichtung zur Durchführung eines Verfahrens zum Starten eines Gießvorganges ohne Anfahrstrang nach einem der vorhergehenden Ansprüche 1 bis 19, bestehend aus zwei mit Drehantrieben (5, 6) gekoppelten, gegensinnig rotierenden Gießwalzen (1, 2) und an den Gießwalzen anliegenden Seitenplatten (8), die gemeinsam einen Schmelzenraum (11) zur Aufnahme der Metallschmelze (12) formen, sowie mindestens einer verlagerbaren Bandleiteinrichtung (22) und mindestens einer Bandtransporteinrichtung (27),
dadurch gekennzeichnet, dassden Gießwalzen (1, 2) eine Geschwindigkeitsmesseinrichtung (34) zur Ermittlung der momentanen Gießgeschwindigkeit (vg) zugeordnet ist;dem Schmelzenraum (11) eine Niveaumesseinrichtung (16) zur Ermittlung der momentanen Gießspiegelhöhe (hgsp) der Metallschmelze zugeordnet ist,und/oder einer der Gießwalzen (1, 2) eine Trennkraft-Messeinrichtung (30) zur Ermittlung der momentanen Trennkraft (FTr) zwischen den beiden Gießwalzen (1, 2) zugeordnet ist,und/oder den Gießwalzen (1, 2) eine Positions-Messeinrichtung (31) zur Ermittlung der momentanen Spaltweite (G) zwischen den Gießwalzen (1, 2) zugeordnet ist,und/oder bandaustrittsseitig der Gießwalzen (1, 2) eine Banddicken-Messeinrichtung (32) zur Ermittlung der momentanen Banddicke (D) des die Gießwalzen (1,2) verlassenenden Metallbandes (21) angeordnet ist,die Geschwindigkeitsmesseinrichtung (34) und die Niveaumesseinrichtung (16) und/oder die Trennkraft-Messeinrichtung (30) und/oder die Positionsmesseinrichtung (31) und/oder die Banddicken-Messeinrichtung (32) durch Signalleitungen mit einer Recheneinheit (36) verbunden sind,die Recheneinheit (36) durch Signalleitungen mit den Drehantrieben (5, 6) der Gießwalzen (1, 2), mit einer Positionsstelleinrichtung (25) der Bandleiteinrichtung (22) und dem Antrieb (27) einer Bandtransporteinrichtung (24) verbunden ist. - Vorrichtung nach Anspruch 20, dadurch gekennzeichnet, dass zumindest eine der beiden Gießwalzen (1 oder 2) mit einer Gießwalzen-Verstelleinrichtung (7) gekoppelt und die Recheneinheit (36) zusätzlich durch eine Signalleitung mit der Gießwalzen-Verstelleinrichtung (7) zur Einstellung einer gegenüber der Betriebs-Gießdicke (D) erhöhten Start-Gießdicke (DSt) verbunden ist.
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SI200330195T SI1536900T1 (sl) | 2002-09-12 | 2003-08-18 | Postopek in naprava za zacetek postopka litja |
AT03798105T ATE312676T1 (de) | 2002-09-12 | 2003-08-18 | Verfahren und vorrichtung zum starten eines giessvorganges |
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AT0136702A AT411822B (de) | 2002-09-12 | 2002-09-12 | Verfahren und vorrichtung zum starten eines giessvorganges |
AT13672002 | 2002-09-12 | ||
PCT/EP2003/009110 WO2004028725A1 (de) | 2002-09-12 | 2003-08-18 | Verfahren und vorrichtung zum starten eines giessvorganges |
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EP1536900A1 EP1536900A1 (de) | 2005-06-08 |
EP1536900B1 true EP1536900B1 (de) | 2005-12-14 |
EP1536900B2 EP1536900B2 (de) | 2012-08-15 |
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US (1) | US7156153B2 (de) |
EP (1) | EP1536900B2 (de) |
KR (1) | KR101143384B1 (de) |
CN (1) | CN100577326C (de) |
AT (1) | AT411822B (de) |
AU (1) | AU2003258624B2 (de) |
DE (1) | DE50301955D1 (de) |
MX (1) | MXPA05002697A (de) |
WO (1) | WO2004028725A1 (de) |
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EP2581150A1 (de) | 2011-10-12 | 2013-04-17 | Siemens Aktiengesellschaft | Gießwalzvorrichtung mit kryogener Kühlung der Gießwalzen |
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CN104942251B (zh) * | 2015-07-01 | 2017-01-11 | 重庆大学 | 炼钢厂连铸机的开浇时间确定方法 |
EP3202502A1 (de) * | 2016-02-04 | 2017-08-09 | Primetals Technologies Germany GmbH | Bandlageregelung |
US10618107B2 (en) | 2016-04-14 | 2020-04-14 | GM Global Technology Operations LLC | Variable thickness continuous casting for tailor rolling |
CN108145112B (zh) * | 2016-12-05 | 2020-01-21 | 上海梅山钢铁股份有限公司 | 基于液位自动控制的板坯连铸塞棒控流自动开浇工艺 |
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-
2002
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- 2003-08-18 MX MXPA05002697A patent/MXPA05002697A/es active IP Right Grant
- 2003-08-18 US US10/527,533 patent/US7156153B2/en not_active Expired - Lifetime
- 2003-08-18 CN CN03821789A patent/CN100577326C/zh not_active Expired - Fee Related
- 2003-08-18 EP EP03798105A patent/EP1536900B2/de not_active Expired - Lifetime
- 2003-08-18 KR KR1020057004324A patent/KR101143384B1/ko active IP Right Grant
- 2003-08-18 WO PCT/EP2003/009110 patent/WO2004028725A1/de not_active Application Discontinuation
- 2003-08-18 DE DE50301955T patent/DE50301955D1/de not_active Expired - Lifetime
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Publication number | Publication date |
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CN1681613A (zh) | 2005-10-12 |
KR101143384B1 (ko) | 2012-05-23 |
AU2003258624B2 (en) | 2008-11-20 |
AT411822B (de) | 2004-06-25 |
US7156153B2 (en) | 2007-01-02 |
DE50301955D1 (de) | 2006-01-19 |
EP1536900B2 (de) | 2012-08-15 |
MXPA05002697A (es) | 2005-05-27 |
AU2003258624A1 (en) | 2004-04-19 |
ATA13672002A (de) | 2003-11-15 |
EP1536900A1 (de) | 2005-06-08 |
US20050224210A1 (en) | 2005-10-13 |
KR20050057316A (ko) | 2005-06-16 |
CN100577326C (zh) | 2010-01-06 |
WO2004028725A1 (de) | 2004-04-08 |
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