EP1307309A1 - Method for producing steel slabs - Google Patents

Method for producing steel slabs

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Publication number
EP1307309A1
EP1307309A1 EP01955369A EP01955369A EP1307309A1 EP 1307309 A1 EP1307309 A1 EP 1307309A1 EP 01955369 A EP01955369 A EP 01955369A EP 01955369 A EP01955369 A EP 01955369A EP 1307309 A1 EP1307309 A1 EP 1307309A1
Authority
EP
European Patent Office
Prior art keywords
strand
determined
force
amplitude
oscillation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01955369A
Other languages
German (de)
French (fr)
Other versions
EP1307309B1 (en
Inventor
Horst Von Wyl
Ingo Schubert
Wolfram Jung
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Demag AG
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Filing date
Publication date
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1307309A1 publication Critical patent/EP1307309A1/en
Application granted granted Critical
Publication of EP1307309B1 publication Critical patent/EP1307309B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • 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
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49988—Metal casting
    • Y10T29/49991—Combined with rolling

Definitions

  • the invention relates to a method for producing slabs from steel, wherein the strand leaves a mold with melt enclosed by a strand shell, and, in a downstream strand guide, the jaw width of guide rollers mounted in segments with upper and lower frames is steplessly followed by adjusting elements connecting them Steps is adjustable, whereby
  • the jaw width is changed by means of oscillation around a center line of the jaw width in such a way that the dynamic influences on the guide rollers are negligibly small
  • the amplitude of the jaw width oscillation is set in a size which does not cause any plastic deformation of the strand shell
  • the jaw width is set to a predeterminable dimension and / or is guided in a pressure-controlled manner via at least one adjusting element.
  • the aim of the method described in DE 197 20 768 C1 is to create a basis for determination by means of which the mouth width can be set exactly over the entire strand guidance using simple measurement and computing means, and the current position of the sump tip within the Can determine slab safely.
  • the method is based on a dynamic measurement by means of excitation of the strand in oscillation, with the help of which it can be recognized whether a trend towards a larger or smaller mouth width, away from the optimal mouth width, occurs at a measuring point, in order to then detect the deviation with targeted ones Correct measures.
  • the positioning force results in a hysteresis curve relative to the jaw width. This has a relatively small area when the shell is still thin and the swamp is relatively large.
  • the hysteresis curve on the other hand, has a relatively large area if the shell continues to grow and the sump volume decreases, and assumes a particularly slim shape when the strand is completely solid.
  • the jaw width is changed with an oscillation around a predeterminable center line of the desired slab thickness.
  • Force-displacement characteristic curves are evaluated, for which purpose the slope of the characteristic curves in the force-displacement plane and their intersection are taken into account, among other things, for the required evaluation.
  • the selected oscillation size should be selected in such a way that the dynamic influences on the strand shell, which is still relatively thin after leaving the mold, are kept negligibly small, the amplitude of the oscillating jaw width being set to a size , which prevents plastic deformation of the strand shell, according to the person skilled in the art, this information is not given a clear, comprehensible teaching on the basis of technical action.
  • the known method assumes, at least implicitly, that the amplitude of the force-displacement characteristic curve on which the calculation is based is determined within the scope of only a single oscillation period, that is to say that the entire measurement path has been covered with one stroke.
  • the object of the invention is to improve and design the known method in such a way that the disadvantages and difficulties of damaging deformation of the strand shell or malfunctions are almost certain when it is carried out using optimal measurement results to avoid their structure such as cracking.
  • a diagram of the mouth width adjustment is determined from a large number of force-displacement measurements along the strand, which is made in the manner of a chain from a large number small force / displacement curves, each in the form of a hysteresis, which can be determined individually by means of an oscillation with a comparatively small amplitude.
  • a comparison with values in this database provides information about the internal width compared to the optimal internal width.
  • An embodiment of the method further provides that from a change in the area of a hysteresis curve - e.g. B. Decrease in area - the location of the swamp tip can be determined.
  • a force-displacement diagram of the width adjustment This consists of a large number of small force-displacement curves, each of which was determined individually using an oscillation with a low amplitude. From this, a safe and quick determination and setting of the optimal mouth width is recognizable and possible for the practical casting operation. After an oscillation with the smallest amplitude, this shows whether the jaw width is too large or too small and needs to be corrected.
  • the invention represents an “X-ray image” of the strand and optimally achieves the object stated at the beginning.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Heat Treatment Of Steel (AREA)
  • Coating With Molten Metal (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Prostheses (AREA)
  • Reinforcement Elements For Buildings (AREA)

Abstract

A method for producing steel slabs, whereby the strand leaves an ingot mold with melt enclosed by a strand shell and, in a strand guide located downstream, the opening width of guide rolls mounted in segments with upper and lower frames can be set in a continuous manner with successive steps by adjusting elements that join said guide rolls. An oscillation around a center line of the opening width serves to modify the opening width in order to render the dynamic influences on the guide rolls negligibly small. The amplitude of the opening width oscillation is set to ta quantity, which des not provoke any plastic deformation of the strand shell. The actual opening width of the guide rolls is detected and the actuating force of the adjusting elements as well as the amplitude of the actuating force are determined at the same time. In the case of an increasing amplitude of the actuating force, the opening width is set to a predeterminable measure and/or guided in a pressure controlled manner via at least one adjusting element. A force/path diagram of the opening width setting is then determined form a multitude of force/path measurements along the strand. Said diagram is composed, in a chain-like manner, of a multitude of small force path curves, which are each provided in the form of a hysteresis and which can be individually determined using an oscillation with a comparatively small amplitude.

Description

Verfahren zum Erzeugen von Brammen aus StahlProcess for producing steel slabs
Die Erfindung betrifft ein Verfahren zum Erzeugen von Brammen aus Stahl, wobei der Strang eine Kokille mit von einer Strangschale umschlossener Schmelze verlasst, und in einer nachgeordneten Strangführung die Maulweite von in Segmenten mit Ober- und Unterrahmen gelagerten Führungsrollen durch sie verbindende Verstellelemente stufenlos mit einander folgenden Schritten einstellbar ist, wobeiThe invention relates to a method for producing slabs from steel, wherein the strand leaves a mold with melt enclosed by a strand shell, and, in a downstream strand guide, the jaw width of guide rollers mounted in segments with upper and lower frames is steplessly followed by adjusting elements connecting them Steps is adjustable, whereby
a) die Maulweite mittels Oszillation um eine Mittellinie der Maulweite in der Weise geändert wird, dass die dynamischen Einflüsse auf die Führungsrollen vernachlässigbar klein sind,a) the jaw width is changed by means of oscillation around a center line of the jaw width in such a way that the dynamic influences on the guide rollers are negligibly small,
b) die Amplitude der Maulweiten-Oszillation in einer Grosse eingestellt wird, die keine plastische Verformung der Strangschale hervorruft,b) the amplitude of the jaw width oscillation is set in a size which does not cause any plastic deformation of the strand shell,
c) die aktuelle Maulweite der Führungsrollen erfasst, undc) the current jaw width of the guide rollers is recorded, and
d) zugleich die Stellkraft der Verstellelemente sowie die Amplitude der Stellkraft ermittelt, undd) at the same time the actuating force of the adjusting elements and the amplitude of the actuating force are determined, and
e) bei steigender Amplitude der Stellkraft die Maulweite auf ein vorgebbares Mass eingestellt und/oder über mindestens ein Verstellelement druckge- regelt geführt wird.e) as the amplitude of the actuating force increases, the jaw width is set to a predeterminable dimension and / or is guided in a pressure-controlled manner via at least one adjusting element.
Das in der DE 197 20 768 C1 beschriebene Verfahren hat zum Ziel, eine Ermittlungsgrundlage zu schaffen, durch weiche die Maulweite mit einfachen messtechnischen sowie rechnerischen Mitteln exakt über die gesamte Strang- führung einstellbar ist, und darüber hinaus sich die aktuelle Position der Sumpfspitze innerhalb der Bramme sicher bestimmen läßt. Das Verfahren beruht im Kern auf einer dynamischen Messung mittels Erregung des Stranges in Oszillation, mit deren Hilfe erkennbar ist, ob an einer Meßstelle ein Trend zu größerer oder zu kleinerer Maulweite, weg von der optimalen Maulweite, auftritt, um daraufhin die erkannte Abweichung mit gezielten Maßnahmen zu korrigieren. Bei der dynamischen Messung ergibt die Stellkraft relativ zur Maulweite eine Hysteresiskurve. Diese hat eine relativ kleine Fläche, wenn die Schale noch dünn und der Sumpf relativ gross ist. Die Hysteresiskurve weist andererseits eine relativ grosse Fläche auf, wenn die Schale weiterhin wächst und das Sumpfvolumen abnimmt, und nimmt eine besonders schlanke Form an, wenn der Strang durcherstarrt ist.The aim of the method described in DE 197 20 768 C1 is to create a basis for determination by means of which the mouth width can be set exactly over the entire strand guidance using simple measurement and computing means, and the current position of the sump tip within the Can determine slab safely. At its core, the method is based on a dynamic measurement by means of excitation of the strand in oscillation, with the help of which it can be recognized whether a trend towards a larger or smaller mouth width, away from the optimal mouth width, occurs at a measuring point, in order to then detect the deviation with targeted ones Correct measures. In the dynamic measurement, the positioning force results in a hysteresis curve relative to the jaw width. This has a relatively small area when the shell is still thin and the swamp is relatively large. The hysteresis curve, on the other hand, has a relatively large area if the shell continues to grow and the sump volume decreases, and assumes a particularly slim shape when the strand is completely solid.
Bei dem bekannten Verfahren wird die Maulweite mit einer Oszillation um eine vorgebbare Mittellinie der angestrebten Brammendicke geändert. Dabei werden Kraft-Weg-Kennlinien ausgewertet, wofür unter anderem für die erforderli- ehe Auswertung die Steigung der Kennlinien in der Kraft-Weg-Ebene und deren Schnittpunkt in Betracht gezogen werden.In the known method, the jaw width is changed with an oscillation around a predeterminable center line of the desired slab thickness. Force-displacement characteristic curves are evaluated, for which purpose the slope of the characteristic curves in the force-displacement plane and their intersection are taken into account, among other things, for the required evaluation.
Obwohl in dem erwähnten Dokument angegeben ist, dass die gewählte Oszilla- tionsgrösse so gewählt werden soll, dass die dynamischen Einflüsse auf die nach Verlassen der Kokille noch relativ dünne Strangschale vernachlässigbar klein gehalten werden, wobei die Amplitude der oszillierenden Maulweite in einer Grosse eingestellt werden soll , die eine plastische Verformung der Strangschale verhindert, ist diesen Angaben nach dem Fachmann keine klare, nachvollziehbare Lehre zum technischen Handeln anhand gegeben. Denn das bekannte Verfahren geht zumindest implizit davon aus, dass die der Berechnung zugrundeliegende Amplitude der Kraft-Weg-Kennlinie im Rahmen von lediglich nur einer einzigen Oszillationsperiode ermittelt wird, das heisst, dass der gesamte Weg der Messung mit einem Hub zurückgelegt wurde. Praktische Messungen für den oben beschriebenen Fall haben jedoch ergeben, dass dabei der Hub eine solche Grosse einnehmen müsste, dass - je nach dem Ausgangspunkt der Oszillation - die Gefahr einer plastischen Deformation der Strangschale mit der Folge von Gefügerissen akut gegeben ist. Ausgehend von den vorgenannten Erkenntnissen und Erfahrungen liegt der Erfindung die Aufgabe zugrunde, das bekannte Verfahren in der Art und Weise zu verbessern und auszugestalten, um bei dessen messtechnischer Durchführung mit Gewinnung optimaler Messergebnisse mit aller Sicherheit die Nachteile und Schwierigkeiten durch schädliche Deformation der Strangschale oder Störungen von deren Gefüge wie Rissbildung zu vermeiden.Although it is stated in the document mentioned that the selected oscillation size should be selected in such a way that the dynamic influences on the strand shell, which is still relatively thin after leaving the mold, are kept negligibly small, the amplitude of the oscillating jaw width being set to a size , which prevents plastic deformation of the strand shell, according to the person skilled in the art, this information is not given a clear, comprehensible teaching on the basis of technical action. The known method assumes, at least implicitly, that the amplitude of the force-displacement characteristic curve on which the calculation is based is determined within the scope of only a single oscillation period, that is to say that the entire measurement path has been covered with one stroke. Practical measurements for the case described above have shown, however, that the stroke would have to be of such a size that - depending on the starting point of the oscillation - there is an acute danger of plastic deformation of the strand shell with the result of structural cracks. On the basis of the above-mentioned knowledge and experience, the object of the invention is to improve and design the known method in such a way that the disadvantages and difficulties of damaging deformation of the strand shell or malfunctions are almost certain when it is carried out using optimal measurement results to avoid their structure such as cracking.
Zur Lösung der Aufgabe wird bei einem Verfahren der im Oberbegriff von Anspruch 1 genannten Art mit der Erfindung vorgeschlagen, dass aus einer Vielzahl von Kraft-Weg-Messungen entlang des Stranges ein Diagramm der Maulweiteneinstellung ermittelt wird, weiches sich nach Art einer Kette aus einer Vielzahl kleiner Kraft/Wege-Kurven, jeweils in Form einer Hysterese, zusammensetzt, die je einzeln mittels einer Oszillation mit vergleichsweise kleiner Amplitude ermittelbar sind. Damit werden die Nachteile und Schwierigkeiten der vorgenannten Art bei der bekannten Messdurchführung mit Sicherheit vermieden und ein optimales Stranggefüge erzielt.To achieve the object, in a method of the type mentioned in the preamble of claim 1, it is proposed with the invention that a diagram of the mouth width adjustment is determined from a large number of force-displacement measurements along the strand, which is made in the manner of a chain from a large number small force / displacement curves, each in the form of a hysteresis, which can be determined individually by means of an oscillation with a comparatively small amplitude. The disadvantages and difficulties of the aforementioned type in the known measurement procedure are thus avoided with certainty and an optimal strand structure is achieved.
Für den praktischen Giessbetrieb ist sowohl eine sichere, wie auch schnellstmögliche Ermittlung und Einstellung der optimalen Maulweite des Strangführungssystems erforderlich. Deshalb soll bereits nach jeder Oszillation mit kleiner Amplitude erkennbar sein, ob die Maulweite "zu gross" oder "zu klein" ist. Zu diesem Zweck wird die Steigung jeder kleinen Hysterese der "Kette" ausgewertet. Diese entspricht der Steifigkeit des Systems "Segment-Strang" an der Meßstelle. Dieser Steifigkeitswert kann dann mit gespeicherten Werten einer Datenbank verglichen werden, die für die Segmentsteuerung hinterlegt ist. Diese Datenbank umfasst aus Erfahrung gewonnene Steifigkeitswerte, die sich auf unterschiedliche Strangbreiten und Erstarrungszustände wie flüssigen Sumpf, oder den Übergangsbereich Solidus/Liquidusfortschritt beziehen. Ein Vergleich mit Werten dieser Datenbank, die bedarfsweise interpoliert oder extrapoliert werden können, gibt Aufschluss über die Maulweite im Vergleich zur optimalen Maulweite. Eine Ausgestaltung des Verfahrens sieht weiterhin vor, dass aus einer Änderung der Fläche einer Hysteresis-Kurve - z. B. Abnahme der Fläche - die Lage der Sumpfspitze ermittelbar ist.For the practical casting operation, both a reliable and quickest possible determination and setting of the optimal mouth width of the strand guide system is required. It should therefore be recognizable after each oscillation with a small amplitude whether the jaw width is "too large" or "too small". For this purpose, the slope of every small hysteresis of the "chain" is evaluated. This corresponds to the rigidity of the "segment strand" system at the measuring point. This stiffness value can then be compared with stored values in a database that is stored for segment control. This database includes stiffness values gained from experience, which refer to different strand widths and solidification states such as liquid sump, or the transition area solidus / liquidus progress. A comparison with values in this database, which can be interpolated or extrapolated as required, provides information about the internal width compared to the optimal internal width. An embodiment of the method further provides that from a change in the area of a hysteresis curve - e.g. B. Decrease in area - the location of the swamp tip can be determined.
Und schließlich ist es mit Vorteil möglich, dass aus einer Änderung der Fläche einer Hysteresis-Kurve - z. B. bei Abnahme der Fläche - eine Zunahme der Strangkonsitenz ermittelt wird.And finally, it is advantageously possible that from a change in the area of a hysteresis curve - e.g. B. with decrease in area - an increase in strand consistency is determined.
Ein Beispiel der Erfindung ist in der beiliegenden Zeichnung dargelegt. Es zeigt:An example of the invention is set out in the accompanying drawing. It shows:
Ein Kraft-Weg-Diagramm der Maulweiten-Einstellung. Diese setzt sich aus einer Vielzahl kleiner Kraft-Weg-Kurven zusammen, die je einzeln mittels einer Oszillation mit geringer Amplitude ermittelt wurden. Daraus ist für den praktischen Giessbetrieb eine sowohl sichere, als auch schnelle Ermittlung und Einstellung der optimalen Maulweite erkennbar und möglich. Daraus ist bereits nach einer Oszillation mit kleinster Amplitude ersichtlich, ob die Maulweite zu gross oder zu klein ist und korrigiert werden muss. Die einzelnen Kurven - jede für sich eine Hysteresis - greifen wie Glieder einer Kette ineinander und zeigen entlang des Stranges den Verlauf der Stellkraft über der Maulweite. Die Erfindung stellt gewissermassen ein "Röntgenbild" des Stranges dar und löst in optimaler Weise die eingangs gestellte Aufgabe. A force-displacement diagram of the width adjustment. This consists of a large number of small force-displacement curves, each of which was determined individually using an oscillation with a low amplitude. From this, a safe and quick determination and setting of the optimal mouth width is recognizable and possible for the practical casting operation. After an oscillation with the smallest amplitude, this shows whether the jaw width is too large or too small and needs to be corrected. The individual curves - each a hysteresis in their own right - interlock like links in a chain and show the course of the actuating force over the jaw width along the strand. To a certain extent, the invention represents an “X-ray image” of the strand and optimally achieves the object stated at the beginning.

Claims

Patentansprüche claims
1. Verfahren zum Erzeugen von Brammen aus Stahl, wobei der Strang eine Kokille mit von einer Strangschale umschlossener Schmelze verlasst und in einer nachgeordneten Strangführung die Maulweite von in Segmenten mit Ober- und Unterrahmen gelagerten Führungsrollen durch sie verbindende Verstellelemente stufenlos mit einander folgenden Schritten einstellbar ist, wobei a) die Maulweite mittels Oszillation um eine Mittellinie der Maulweite in der Weise geändert wird, dass die dynamischen Einflüsse auf die1. A method for producing slabs from steel, the strand leaving a mold with melt enclosed by a strand shell and, in a downstream strand guide, the jaw width of guide rollers mounted in segments with upper and lower frames can be adjusted continuously with successive steps by connecting elements connecting them , wherein a) the mouth width is changed by means of oscillation around a center line of the mouth width in such a way that the dynamic influences on the
Führungsrollen vernachlässigbar klein sind, b) die Amplitude der Maulweiten-Oszillation in einer Grosse eingestellt wird, die keine plastische Verformung der Strangschale hervorruft, c) die aktuelle Maulweite der Führungsrollen erfasst, und d) zugleich die Stellkraft der Verstellelemente sowie die Amplitude derGuide rollers are negligibly small, b) the amplitude of the jaw width oscillation is set to a size that does not cause plastic deformation of the strand shell, c) the current jaw width of the guide rollers is detected, and d) at the same time the actuating force of the adjusting elements and the amplitude of the
SteHkraft ermittelt, und e) bei steigender Amplitude der Stellkraft die Maulweite auf ein vorgebbares Mass eingestellt und/oder über mindestens ein Verstellelement druckgeregelt geführt wird, dadurch gekennzeichne , dass aus einer Vielzahl von Kraft/Weg-Messungen entlang des Stranges ein Kraft/Weg-Diagramm der Maulweiteneinstellung ermittelt wird, weiches sich nach Art einer Kette aus einer Vielzahl kleiner Kraft/Wege-Kurven jeweils in Form einer Hysterese zusammensetzt, die je einzeln mittels einer Oszillation mit vergleichsweise kleiner Amplitude ermittelbar sind.Standing force is determined, and e) when the amplitude of the actuating force increases, the jaw width is set to a predeterminable dimension and / or is pressure-controlled via at least one adjusting element, characterized in that a force / displacement is made from a large number of force / displacement measurements along the strand. Diagram of the mouth width adjustment is determined, which is composed of a plurality of small force / displacement curves in the form of a chain, each in the form of a hysteresis, each of which can be determined individually by means of an oscillation with a comparatively small amplitude.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass jede in Form einer Hysterese ermittelte Kurve nach Massgabe ihrer Steigung als Index der aktuellen Steifigkeit des Systems "Segment-2. The method according to claim 1, characterized in that each curve determined in the form of a hysteresis according to its slope as an index of the current rigidity of the system "segment
Strang" ermittelt und ausgewertet wird. Strand "is determined and evaluated.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der ermittelte Steifigkeitskennwert mit gespeicherten Daten einer mit Erfahrungswerten gespeisten Datenbank - die bedarfsweise interpolierbar oder extrapolierbar sind - verglichen wird und erkennbare Abweichungen durch entsprechende Maulweiteneinstellung korrigiert werden.3. The method according to claim 1 or 2, characterized in that the determined stiffness value is compared with stored data of a database fed with empirical values - which can be interpolated or extrapolated as required - and discernible deviations are corrected by appropriate adjustment of the jaw width.
4. Verfahren nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass aus jeder Hysteresis-Kurve bereits nach einer Oszillation mit vergleichsweise kleiner Amplitude festgestellt wird, ob die eingestellte Maulweite der Führungsrollen von der optimalen Grosse in Richtung "zu gross" oder "zu klein" abweicht, woraufhin eine entsprechende Korrektur vorgenommen wird.4. The method according to one or more of claims 1 to 3, characterized in that it is determined from each hysteresis curve already after an oscillation with a comparatively small amplitude, whether the set jaw width of the guide rollers of the optimal size in the direction "too large" or "too small" deviates, whereupon a corresponding correction is made.
5. Verfahren nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass aus einer Änderung der Fläche einer Hysteresis-Kurve - z. B. bei Abnahme der Fläche - die Lage der Sumpfspitze ermittelt wird.5. The method according to one or more of claims 1 to 4, characterized in that from a change in the area of a hysteresis curve - z. B. with decrease in area - the position of the swamp tip is determined.
6. Verfahren nach einem oder mehreren der Ansprüche.1 bis 4, dadurch gekennzeichnet, dass aus einer Änderung der Fläche einer Hysteresis-Kurve - z. B. bei Abnahme der Fläche - eine Zunahme den Strangkonsistenz ermittelt wird. 6. The method according to one or more of claims 1 to 4, characterized in that from a change in the area of a hysteresis curve - for. B. when the area decreases - an increase in the strand consistency is determined.
EP01955369A 2000-08-10 2001-07-25 Method for producing steel slabs Expired - Lifetime EP1307309B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10039016A DE10039016B4 (en) 2000-08-10 2000-08-10 Method for producing steel slabs
DE10039016 2000-08-10
PCT/EP2001/008577 WO2002011925A1 (en) 2000-08-10 2001-07-25 Method for producing steel slabs

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EP1307309B1 EP1307309B1 (en) 2004-05-26

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EP (1) EP1307309B1 (en)
JP (1) JP2004505776A (en)
KR (1) KR100817173B1 (en)
CN (1) CN1234483C (en)
AT (1) ATE267654T1 (en)
AU (1) AU2001277552A1 (en)
DE (2) DE10039016B4 (en)
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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10224533A1 (en) * 2002-05-31 2003-12-18 Sms Demag Ag Method for determining the frictional force in a system exposed to forced vibrations
DE10349962B3 (en) * 2003-10-24 2005-06-02 Ingo Dr. Schubert Arrangement for determining the consistency of a cast strand in a continuous casting plant and / or its mouth width
US7613870B2 (en) * 2004-11-18 2009-11-03 International Business Machines Corporation Efficient memory usage in systems including volatile and high-density memories
DE102006016375B4 (en) * 2006-04-05 2023-02-16 Sms Group Gmbh Process and device for determining the core solidification and/or the sump peak during the continuous casting of metals, in particular of steel materials
ES2653573T3 (en) * 2007-12-27 2018-02-07 Cibus Europe B.V. Mixtures of fatty acid butyl ester
CN102310181B (en) * 2011-08-05 2013-03-13 河北钢铁股份有限公司邯郸分公司 Dynamic slight press fan-shaped section deformation on-line measuring and compensating method
CN103048242A (en) * 2013-01-21 2013-04-17 中冶赛迪电气技术有限公司 Method and device for detecting solid fraction and final stage of solidification of continuously cast slab
CN104751288B (en) * 2015-03-30 2018-10-09 北京首钢自动化信息技术有限公司 A kind of coil of strip segmentation online quality judging system and method for multidimensional
CN113732075A (en) * 2021-09-07 2021-12-03 重庆钢铁股份有限公司 Slab width measuring and shunting method

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2133144B2 (en) * 1971-07-03 1973-09-27 Concast Ag, Zuerich (Schweiz) Method and device for conveying and straightening a strand in a continuous casting plant
US3891025A (en) 1972-06-29 1975-06-24 Schloemann Siemag Ag Apparatus for withdrawing a casting and feeding a dummy bar in a continuous casting machine for steel
JPS5134823A (en) * 1974-09-18 1976-03-24 Nippon Steel Corp Renzokuchuzo no chuhenatsumiseigyohoho
JPS5530311A (en) * 1978-08-22 1980-03-04 Nippon Steel Corp Induction and guidance method for cast piece of continuous casting
JPS56131051A (en) * 1979-12-26 1981-10-14 Nippon Steel Corp Roll interval controller
DE3716510A1 (en) * 1987-05-16 1988-12-01 Korf Engineering Gmbh DEVICE FOR STRAIGHTING AN ARC SHAPED STEEL STRAND
DE19720768C1 (en) * 1997-05-07 1999-01-14 Mannesmann Ag Method and device for producing steel slabs
JP2000079457A (en) * 1998-09-02 2000-03-21 Nkk Corp Device for controlling interval between roll segments in continuous caster
JP2001052911A (en) * 1999-08-11 2001-02-23 Seiko Epson Corp Manufacturing for magnetic material, thin band-shaped magnetic material, magnetic powder, and bonded magnet

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0211925A1 *

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DE10039016A1 (en) 2002-02-21
US20040006862A1 (en) 2004-01-15
EP1307309B1 (en) 2004-05-26
WO2002011925A1 (en) 2002-02-14
US6935408B2 (en) 2005-08-30
CN1446135A (en) 2003-10-01
ATE267654T1 (en) 2004-06-15
JP2004505776A (en) 2004-02-26
DE50102426D1 (en) 2004-07-01
RU2262412C2 (en) 2005-10-20
CN1234483C (en) 2006-01-04
UA74589C2 (en) 2006-01-16
KR20030020460A (en) 2003-03-08
DE10039016B4 (en) 2010-02-25
AU2001277552A1 (en) 2002-02-18
KR100817173B1 (en) 2008-03-27

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