EP1491275B1 - Process for detecting nucleate boiling in the cooling channels of a continuous casting mould - Google Patents
Process for detecting nucleate boiling in the cooling channels of a continuous casting mould Download PDFInfo
- Publication number
- EP1491275B1 EP1491275B1 EP04012297A EP04012297A EP1491275B1 EP 1491275 B1 EP1491275 B1 EP 1491275B1 EP 04012297 A EP04012297 A EP 04012297A EP 04012297 A EP04012297 A EP 04012297A EP 1491275 B1 EP1491275 B1 EP 1491275B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mold
- nucleate boiling
- cooling channels
- cooling
- continuous casting
- 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.)
- Expired - Lifetime
Links
- 238000009835 boiling Methods 0.000 title claims abstract description 25
- 238000001816 cooling Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 6
- 238000009749 continuous casting Methods 0.000 title claims description 10
- 238000005266 casting Methods 0.000 claims abstract description 14
- 239000002826 coolant Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims 2
- 238000009833 condensation Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 239000000498 cooling water Substances 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
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
- B22D11/16—Controlling or regulating processes or operations
-
- 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
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
Definitions
- the invention relates to a method and a measuring arrangement for detecting nucleate boiling in the cooling channels of a continuous casting mold and means for suppressing them.
- Chill mold cooling is usually designed based on experience, temperature measurements, literature references and / or numerical calculations.
- the copper temperatures which occur in particular at high casting speeds and decreasing copper wall thicknesses can in critical cases lead to uncontrolled nucleate boiling on the water side.
- the uncontrolled nucleate boiling leads to an uneven heat transfer in the mold and can cause strand defects.
- the known document proposes that the flow velocity and the water pressure of the cooling system be adjusted so that the lowest temperature in the region of the water outlet side is at the boiling point, and that for all higher temperatures bubble evaporation in the supercooled boiling of the Cooling water is stimulated.
- the document EP 0 881 018 B1 discloses a liquid-cooled continuous casting mold with mutually independent walls of copper plates, wherein in the lower part of the inlet of cooling water and in the upper wall region of the cooling water drain is arranged, and in close sequence each in a vertical plane cooling channels with inlet and outlet holes are arranged.
- the inlet holes form the inlet of the cooling water flow into the cooling channels of the mold wall, while the sum of the drainage holes together form the water drain and the cooling water inlet at least one temperature sensor and an encoder for the feed rate per unit time is arranged and further wherein in the water drainage area between a copper plate and the cooling water drainage openings of the water box per broad side plate at least two points are connected temperature sensor.
- the signals of water temperatures and quantities of water supplied to a computer allow a differentiated statement about the distribution of partial heat flows along the mold width.
- Document DE 36 32 333 C2 discloses a device for monitoring oscillations of a continuous casting mold oscillatingly drivable in the casting direction with a vibration sensor connectable to an evaluation circuit in the form of an acceleration sensor which can be attached to the mold.
- the vibration sensor consists of a three-component accelerometer which is connected via a double integrator to a read-out memory for each component which can be read out according to a freely selectable program.
- the document GB-A-2 068 803 relates to a device for preventing breakthroughs in a continuous casting plant during the casting of steel using accelerometers which are arranged on the slab mold or on the lifting table.
- the document US-A-4,542,781 relates to a device for breakthrough warning in a continuous casting plant consisting of an accelerometer, a charge amplifier connected to these and a comparator stage, which in turn comprises a narrow-band frequency analyzer and a desktop computer.
- the structure-borne noise occurring in the area of the continuous casting mold, which is amplified by the charge amplifier, is stored by a recording device.
- the present invention seeks to establish a continuous monitoring for undercooled nucleate boiling in the cooling channels of a continuous casting mold in order to avoid uncontrolled nucleate boiling, which is the cause of uneven heat transfer from the cast metal into the mold walls is and can cause strand defects.
- the speed and / or the pressure of the coolant in the cooling channels of the mold is increased in accordance with the determined controlled variable until the signal pattern of background noise is reached again in the casting operation without undercooled nucleate boiling.
- the pressure waves produced during recondensation are significantly above the background noise in the mold plate without undercooled nucleate boiling.
- the possibility is created due to safe and timely detection of the beginning of a supercooled bubble boiling to avoid the formation of temperature differences in the range of the bath level and thus to reduce different melting behavior of the casting powder and to avoid strand defects.
- Figure 1 shows a wide side wall 11 and a mold 10.
- a bore 12 is arranged laterally, which receives a temperature sensor 13. This has the task to determine the current temperature of the broad side wall 11 and the mold 10 by measurement.
- FIG. 2 shows a measuring arrangement for detecting nucleate boiling in the cooling channels of the mold 10 in a continuous casting installation (not shown).
- an encoder 13 is connected to the control circuit 14 for detecting the sound pulses emitted during the subcooled nucleate boiling in the cooling channels.
- the control circuit 14 has as modules the measuring units 1 and 2 or controller, which cooperate with changing the coolant parameters of the mold.
- the controller 1 receives with the aid of the encoder 13 a noise floor as a basic pattern of a sound emission in the mold in the casting operation without undercooled nucleate boiling.
- the controller 1 receives from the control circuit 14 the current values for water pressure, water velocity and casting speed and sound emission and compares the latter with the basic pattern of the noise emission of the encoder 13 and forms from the comparison of the current parameter data using the comparison units 4, 5, 6 controlled variables using of the controller 2 for changing the cooling parameters of the mold 10.
- reference values for the controller 2 in the regulator circuit are applied to the comparison units 4, 5, 6.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren und eine Messanordnung zum Erkennen von Blasensieden in den Kühlkanälen einer Stranggießkokille und Mittel zu deren Unterdrückung.The invention relates to a method and a measuring arrangement for detecting nucleate boiling in the cooling channels of a continuous casting mold and means for suppressing them.
Die Kokillenkühlung wird üblicherweise auf der Basis von Erfahrungen, Temperaturmessungen, Literaturangaben und/oder numerischen Berechnungen ausgelegt.Chill mold cooling is usually designed based on experience, temperature measurements, literature references and / or numerical calculations.
Die insbesondere bei hohen Gießgeschwindigkeiten und abnehmenden Kupferwandstärken auftretenden Kupfertemperaturen können in kritischen Fällen zu einem unkontrollierten Blasensieden auf der Wasserseite führen. Das unkontrollierte Blasensieden führt zu einem ungleichmäßigen Wärmeübergang in der Kokille und kann Strangfehler verursachen.The copper temperatures which occur in particular at high casting speeds and decreasing copper wall thicknesses can in critical cases lead to uncontrolled nucleate boiling on the water side. The uncontrolled nucleate boiling leads to an uneven heat transfer in the mold and can cause strand defects.
Aus dem Dokument EP 0 992 304 A1 ist bekannt, dass bei Auslegung der Kokillenkühlung zumeist die Strömungsgeschwindigkeit und der Wasserdruck an der Austrittsseite des Kühlsystems so gewählt werden, dass für die heißeste Stelle der Kokille die Temperaturen an der Oberfläche der Kühlkanäle unter der Siedetemperatur des Wassers entsprechend dem Austrittsdruck liegen.It is known from the document EP 0 992 304 A1 that the flow velocity and the water pressure at the outlet side of the cooling system are usually selected when designing the mold cooling, that for the hottest part of the mold the temperatures at the surface of the cooling channels are below the boiling temperature of the water according to the outlet pressure.
Dabei können sich an der Kontaktfläche der Schmelze zur Kokillenplatte im Bereich des Badspiegels unterschiedliche Wärmebelastungen ergeben, die zu unterschiedlichem Aufschmelzverhalten des Giesspulvers führen und damit zu Ungleichmässigkeiten in der Ausbildung der noch sehr empfindlichen Strangschale in statu nascendi.In this case, different heat loads can result at the contact surface of the melt to the mold plate in the region of the bath level, which lead to different melting behavior of the casting powder and thus to unevenness in the formation of the still very sensitive strand shell in statu nascendi.
Zur Verbesserung dieser nachteiligen Verhältnisse schlägt das bekannte Dokument vor, dass die Strömungsgeschwindigkeit und der Wasserdruck des Kühlsystems so eingestellt werden, dass die niedrigste Temperatur im Bereich der Wasseraustrittsseite an der Grenze der Siedetemperatur liegt, und dass für alle höheren Temperaturen eine Blasenverdampfung beim unterkühlten Sieden des Kühlwassers angeregt wird.To improve these disadvantageous conditions, the known document proposes that the flow velocity and the water pressure of the cooling system be adjusted so that the lowest temperature in the region of the water outlet side is at the boiling point, and that for all higher temperatures bubble evaporation in the supercooled boiling of the Cooling water is stimulated.
Dadurch wird erreicht, dass die Wärmestromdichte beim Wärmeübergang vom gegossenen Metallstrang über die Kokillenwand auf das Kühlmedium Wasser infolge des erhöhten Verbrauchs an Verdampfungswärme für die Blassenverdampfung mit steigender Überschreitung der Siedetemperatur durch entsprechende Intensivierung der Blasenverdampfung derart erhöht wird, dass sich die Temperaturunterschiede über die Kokillenbreite verringern, womit eine Egalisierung der Temperaturverteilung im Bereich des Badspiegels durch gezielte Kühlung der Kokillenwände und damit auch des Metallstranges mit Hilfe des unterkühlten Siedens des Kühlwassers erzielt wird.This ensures that the heat flux density is increased in the heat transfer from the cast metal strand on the mold wall to the cooling medium water due to the increased consumption of heat of evaporation for the Pale evaporation with increasing excess of the boiling temperature by corresponding intensification of the bubble evaporation such that reduce the temperature differences over the mold width , whereby a leveling of the temperature distribution in the region of the bath level is achieved by targeted cooling of the mold walls and thus also of the metal strand with the aid of the supercooled boiling of the cooling water.
Das Dokument EP 0 881 018 B1 offenbart eine flüssigkeitsgekühlte Stranggießkokille mit voneinander unabhängigen Wänden aus Kupferplatten, wobei im unteren Bereich der Zulauf von Kühlwasser und im oberen Wandbereich der Kühlwasserablauf angeordnet ist, und in dichter Folge jeweils in einer vertikalen Ebene Kühlkanäle mit Zu- und Ablaufbohrungen angeordnet sind. Die Zulaufbohrungen bilden den Zulauf des Kühlwasserstromes in die Kühlkanäle der Kokillenwand, während die Summe der Ablaufbohrungen zusammen den Wasserablauf bilden und im Kühlwasserzulauf wenigstens ein Temperaturfühler und ein Geber für die Zulaufmenge pro Zeiteinheit angeordnet ist und wobei ferner im Wasserablaufbereich zwischen einer Kupferplatte und den Kühlwasserablauföffnungen des Wasserkastens pro Breitseitenplatte mindestens an zwei Stellen Temperaturfühler angeschlossen sind. Die einem Rechner zugeführten Signale von Wassertemperaturen und Wassermengen ermöglichen eine differenzierte Aussage über die Verteilung partieller Wärmeströme entlang der Kokillenbreite.The document EP 0 881 018 B1 discloses a liquid-cooled continuous casting mold with mutually independent walls of copper plates, wherein in the lower part of the inlet of cooling water and in the upper wall region of the cooling water drain is arranged, and in close sequence each in a vertical plane cooling channels with inlet and outlet holes are arranged. The inlet holes form the inlet of the cooling water flow into the cooling channels of the mold wall, while the sum of the drainage holes together form the water drain and the cooling water inlet at least one temperature sensor and an encoder for the feed rate per unit time is arranged and further wherein in the water drainage area between a copper plate and the cooling water drainage openings of the water box per broad side plate at least two points are connected temperature sensor. The signals of water temperatures and quantities of water supplied to a computer allow a differentiated statement about the distribution of partial heat flows along the mold width.
Das Dokument DE 36 32 333 C2 offenbart eine Vorrichtung zum Überwachen von Schwingungen einer in Giessrichtung schwingend antreibbaren Stranggießkokille mit einem an eine Auswertschaltung anschließbaren Schwingungsaufnehmer in Form eines an der Kokille befestigbaren Beschleunigungsgebers. Der Schwingungsaufnehmer besteht aus einem Dreikomponenten-Beschleunigungsgeber, der über einen Doppelintegrator an einen nach einem frei wählbaren Programm auslesbaren Messwertspeicher für die einzelnen Komponenten angeschlossen ist.Document DE 36 32 333 C2 discloses a device for monitoring oscillations of a continuous casting mold oscillatingly drivable in the casting direction with a vibration sensor connectable to an evaluation circuit in the form of an acceleration sensor which can be attached to the mold. The vibration sensor consists of a three-component accelerometer which is connected via a double integrator to a read-out memory for each component which can be read out according to a freely selectable program.
Das Dokument GB-A-2 068 803 betrifft eine Vorrichtung zur Vermeidung von Durchbrüchen in einer Stranggießanlage beim Vergießen von Stahl unter Verwendung von Beschleunigungsmessern, die an der Brammenkokille oder am Hubtisch angeordnet sind.The document GB-A-2 068 803 relates to a device for preventing breakthroughs in a continuous casting plant during the casting of steel using accelerometers which are arranged on the slab mold or on the lifting table.
Das Dokument US-A-4,542,781 betrifft eine Vorrichtung zur Durchbruchwarnung bei einer Stranggießanlage bestehend aus einem Beschleunigungsaufnehmer, einem an diesen angeschlossenen Ladungsverstärker und aus einer Vergleicherstufe, die ihrerseits einen Schmalband-Frequenzanalysator und einen Tischrechner umfasst. Der im Bereich der Stanggußkokille auftretende Körperschall , der vom Ladungsverstärker verstärkt ist, wird von einer Aufzeichnungsvorrichtung abgespeichert.The document US-A-4,542,781 relates to a device for breakthrough warning in a continuous casting plant consisting of an accelerometer, a charge amplifier connected to these and a comparator stage, which in turn comprises a narrow-band frequency analyzer and a desktop computer. The structure-borne noise occurring in the area of the continuous casting mold, which is amplified by the charge amplifier, is stored by a recording device.
Ausgehend vom vorgenannten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, im laufenden Gießbetrieb eine kontinuierliche Überwachung auf unterkühltes Blasensieden in den Kühlkanälen einer Stranggießkokille einzurichten, um damit ein unkontrolliertes Blasensieden zu vermeiden, welches die Ursache für einen ungleichmäßigen Wärmeübergang vom gegossenen Metall in die Kokillenwände ist und Strangfehler hervorrufen kann.Based on the aforementioned prior art, the present invention seeks to establish a continuous monitoring for undercooled nucleate boiling in the cooling channels of a continuous casting mold in order to avoid uncontrolled nucleate boiling, which is the cause of uneven heat transfer from the cast metal into the mold walls is and can cause strand defects.
Zur Lösung der Aufgabe wird bei einem Verfahren der im Oberbegriff von Anspruch 1 genannten Art mit der Erfindung vorgeschlagen, die beim Rekondensieren der Blasen entstehenden Druckwellen messtechnisch zu erfassen und mit dem Grundrauschen in der Kokille im Gießbetrieb ohne unterkühltes Blasensieden zu vergleichen und aus dem Vergleich beider Messgrößen eine Regelgröße zur Veränderung der Kühlparameter der Kokille zu ermitteln.To solve the problem, it is proposed in a method referred to in the preamble of claim 1 with the invention to measure the resulting pressure waves during recondensation pressure waves and compare with the background noise in the mold in the casting without supercooled nucleate boiling and from the comparison Measured variables to determine a controlled variable for changing the cooling parameters of the mold.
Damit gelingt es, nahezu verzögerungslos auf ein erstes Auftreten des unterkühlten Blasensiedens zu reagieren, was beispielsweise durch eine Messung der Temperaturerhöhung des Kokillenkühlwassers nicht möglich ist, da die Temperaturerhöhung z. B. durch eine Erhöhung der Gießgeschwindigkeit oder den Einsatz eines weniger isolierenden Pulvers verursacht wird.This makes it possible to react almost instantaneously to a first occurrence of supercooled bubbling, which is not possible for example by measuring the temperature increase of Kokillenkühlwassers, since the temperature increase z. B. caused by an increase in the casting speed or the use of a less insulating powder.
In Ausgestaltung der Erfindung ist vorgesehen, dass nach Maßgabe der ermittelten Regelgröße beispielsweise die Geschwindigkeit und/oder der Druck des Kühlmittels in den Kühlkanälen der Kokille erhöht wird bis das Signalmuster des Grundrauschens im Gießbetrieb ohne unterkühltes Blasensieden wieder erreicht ist.In an embodiment of the invention, it is provided that, for example, the speed and / or the pressure of the coolant in the cooling channels of the mold is increased in accordance with the determined controlled variable until the signal pattern of background noise is reached again in the casting operation without undercooled nucleate boiling.
Die beim Rekondensieren entstehenden Druckwellen liegen nämlich deutlich oberhalb des Grundrauschens in der Kokillenplatte ohne unterkühltes Blasensieden.Namely, the pressure waves produced during recondensation are significantly above the background noise in the mold plate without undercooled nucleate boiling.
Mit der Erfindung wird infolge sicherer und rechtzeitiger Erfassung des Beginns eines unterkühlten Blasensiedens die Möglichkeit geschaffen, die Bildung von Temperaturunterschieden im Bereich des Badspiegels zu vermeiden und damit unterschiedliches Aufschmelzverhalten des Gießpulvers zu mindern sowie Strangfehler zu vermeiden.With the invention, the possibility is created due to safe and timely detection of the beginning of a supercooled bubble boiling to avoid the formation of temperature differences in the range of the bath level and thus to reduce different melting behavior of the casting powder and to avoid strand defects.
Weitere Einzelheiten, Merkmale und Vorteile der Erfindung ergeben sich aus der nachstehenden Erläuterung eines in den Zeichnungen schematisch dargestellten Ausführungsbeispieles.Further details, features and advantages of the invention will become apparent from the following explanation of an embodiment schematically illustrated in the drawings.
Es zeigen:
- Fig. 1
- eine Breitseitenwand einer Kokille mit integriertem Messgerät zur Erfassung der beim unterkühlten Blasensieden in den Kühlkanälen ausgesandten Schallimpulsen, angeordnet in einem Regelkreis.
- Fig. 2
- den Aufbau des Regelkreises.
- Fig. 1
- a broad side wall of a mold with integrated measuring device for detecting the sound pulses emitted during the subcooled nucleate boiling in the cooling channels, arranged in a control loop.
- Fig. 2
- the structure of the control loop.
Figur 1 zeigt eine Breitseitenwand 11 und eine Kokille 10. In der Breitseitenwand 11 ist seitlich eine Bohrung 12 angeordnet, die einen Temperaturfühler 13 aufnimmt. Dieser hat die Aufgabe, die aktuelle Temperatur der Breitseitenwand 11 und der Kokille 10 messtechnisch zu ermitteln.Figure 1 shows a
Figur 2 zeigt eine Messanordnung zum Erkennen von Blasensieden in den Kühlkanälen der Kokille 10 in einer nicht dargestellten Stranggießanlage.FIG. 2 shows a measuring arrangement for detecting nucleate boiling in the cooling channels of the
Bei dieser Messanordnung steht ein Geber 13 zur Erfassung der beim unterkühlten Blasensieden in den Kühlkanälen ausgesandten Schallimpulse mit dem Regelkreis 14 in Verbindung. Der Regelkreis 14 besitzt als Bausteine die Messeinheiten 1 und 2 bzw. Regler, die mit Änderung der Kühlmittelparameter der Kokille zusammenwirken. Der Regler 1 empfängt mit Hilfe des Gebers 13 ein Grundrauschen als Grundmuster einer Schallemission in der Kokille im Gießbetrieb ohne unterkühltes Blasensieden. Der Regler 1 erhält aus dem Regelkreis 14 die aktuellen Werte für Wasserdruck, Wassergeschwindigkeit und Gießgeschwindigkeit sowie Schallemission und vergleicht letztere mit dem Grundmuster der Schallemission des Gebers 13 und bildet aus dem Vergleich der aktuellen Parameterdaten mit Hilfe der Vergleichseinheiten 4, 5, 6 Regelgrößen mit Hilfe des Reglers 2 zur Veränderung der Kühlparameter der Kokille 10. Auf die Vergleichseinheiten 4, 5, 6 werden zugleich Sollwerte für den Regler 2 im Reglerkreis aufgeschaltet.In this measuring arrangement, an
Nach Maßgabe der ermittelten Regelgröße im Regler 2 werden dann die aktuellen Werte für Gießgeschwindigkeit, Wassergeschwindigkeit und Wasserdruck, solange verändert, bis wieder das entsprechende Grundrauschen in der Kokille ohne unterkühltes Blasensieden erreicht ist.In accordance with the determined control variable in the
Claims (2)
- Method of recognising nucleate boiling in the cooling channels of a mould (10) of a continuous casting plant, characterised in that pressure waves arising on recondensation of bubbles are detected on a measurement basis and compared with the background noise in the mould (10) in casting operation without subcooled nucleate boiling, and a regulating magnitude for changing the cooling parameters of the mould (10) is determined from the comparison of the two measurement magnitudes.
- Method according to claim 1, characterised in that, for example, the speed and/or the pressure of the coolant in the cooing channels of the mould (10) is increased according to the determined regulating magnitude until the signal pattern of the background noise in casting operation without subcooled nucleate boiling is again achieved.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10329033 | 2003-06-27 | ||
| DE10329033A DE10329033A1 (en) | 2003-06-27 | 2003-06-27 | Method and measuring arrangement for detecting nucleate boiling in the cooling channels of a continuous casting mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1491275A1 EP1491275A1 (en) | 2004-12-29 |
| EP1491275B1 true EP1491275B1 (en) | 2006-08-23 |
Family
ID=33395018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04012297A Expired - Lifetime EP1491275B1 (en) | 2003-06-27 | 2004-05-25 | Process for detecting nucleate boiling in the cooling channels of a continuous casting mould |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1491275B1 (en) |
| AT (1) | ATE337119T1 (en) |
| DE (2) | DE10329033A1 (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5689356A (en) * | 1979-12-21 | 1981-07-20 | Nippon Steel Corp | Detection of abnormality of mold in continuous casting |
| JPS5689355A (en) * | 1979-12-21 | 1981-07-20 | Nippon Steel Corp | Detection of casting state of mold for continuous casting |
| DE3005801C2 (en) * | 1980-02-13 | 1983-11-10 | Mannesmann AG, 4000 Düsseldorf | Process to avoid breakthroughs in continuous casting plants |
| DE3300327C2 (en) * | 1983-01-07 | 1985-01-10 | Klöckner-Werke AG, 4100 Duisburg | Method for breakthrough warning in a continuous caster and device for carrying out this method |
| DE3632333C2 (en) * | 1986-09-24 | 1993-12-02 | Voest Alpine Ind Anlagen | Device for monitoring the vibrations of a continuous casting mold |
| DE19838331A1 (en) * | 1997-05-31 | 2000-03-02 | Schloemann Siemag Ag | Measuring and control of the temperature and volume of cooling water for a continuous casting mold involves adjusting the water flow rate and pressure at the exit from the mold plates |
| DE19722877C2 (en) * | 1997-05-31 | 1999-09-09 | Schloemann Siemag Ag | Liquid-cooled continuous casting mold |
| US6415850B1 (en) * | 1998-08-24 | 2002-07-09 | Sms Schloemann-Siemag Aktiengesellschaft | Method of measuring and regulating temperature and quantity of cooling water for water-coolable mold walls of a continuous casting mold |
-
2003
- 2003-06-27 DE DE10329033A patent/DE10329033A1/en not_active Withdrawn
-
2004
- 2004-05-25 EP EP04012297A patent/EP1491275B1/en not_active Expired - Lifetime
- 2004-05-25 DE DE502004001245T patent/DE502004001245D1/en not_active Expired - Fee Related
- 2004-05-25 AT AT04012297T patent/ATE337119T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE10329033A1 (en) | 2005-01-13 |
| DE502004001245D1 (en) | 2006-10-05 |
| ATE337119T1 (en) | 2006-09-15 |
| EP1491275A1 (en) | 2004-12-29 |
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