EP1491275A1 - Procedé et dispositif de mesure pour la détection d'ébullition dans les canaux de refroidissement d'une coquille de coulée continue - Google Patents

Procedé et dispositif de mesure pour la détection d'ébullition dans les canaux de refroidissement d'une coquille de coulée continue Download PDF

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Publication number
EP1491275A1
EP1491275A1 EP04012297A EP04012297A EP1491275A1 EP 1491275 A1 EP1491275 A1 EP 1491275A1 EP 04012297 A EP04012297 A EP 04012297A EP 04012297 A EP04012297 A EP 04012297A EP 1491275 A1 EP1491275 A1 EP 1491275A1
Authority
EP
European Patent Office
Prior art keywords
mold
cooling channels
detecting
cooling
bubble boiling
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
EP04012297A
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German (de)
English (en)
Other versions
EP1491275B1 (fr
Inventor
Stephan Schulze
Hans Streubel
Peter Dr. Heinrich
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1491275A1 publication Critical patent/EP1491275A1/fr
Application granted granted Critical
Publication of EP1491275B1 publication Critical patent/EP1491275B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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 bubble boiling in the cooling channels of a continuous casting mold and means for suppressing them.
  • the mold cooling is usually designed on the basis of experience, temperature measurements, literature information and / or numerical calculations.
  • the copper temperatures that occur in particular at high casting speeds and decreasing copper wall thicknesses can lead to an uncontrolled bubble boiling on the water side in critical cases.
  • the uncontrolled bubble boiling leads to uneven heat transfer in the mold and can cause strand defects.
  • the known document proposes that the flow rate and the water pressure of the cooling system be set so that the lowest temperature in the region of the water outlet side is at the boiling point limit, and that for all higher temperatures, bubble evaporation during supercooled boiling of the Cooling water is excited.
  • Document EP 0 881 018 B1 discloses a liquid-cooled continuous casting mold with mutually independent walls made of copper plates, the inlet of cooling water being arranged in the lower region and the cooling water outlet being arranged in the upper region of the wall, and cooling ducts with inlet and outlet bores in each case in a vertical plane are arranged.
  • the inlet bores form the inlet of the cooling water flow into the cooling channels of the mold wall, while the sum of the drain bores together form the water drain and at least one temperature sensor and a sensor for the feed quantity per unit of time is arranged in the cooling water inlet, and temperature sensors are also connected at least at two points in the water drainage area between a copper plate and the cooling water drain openings of the water box per broadside plate.
  • the signals of water temperatures and water quantities fed to a computer enable 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 vibrations of a continuous casting mold that can be driven in the casting direction with a vibration sensor that can be connected to an evaluation circuit in the form of an accelerometer that can be attached to the mold.
  • the vibration sensor consists of a three-component accelerometer, which is connected via a double integrator to a measured value memory for the individual components that can be read out according to a freely selectable program.
  • the invention has for its object to set up a continuous monitoring for supercooled bubble boiling in the cooling channels of a continuous casting mold in the ongoing casting operation, in order to avoid an uncontrolled bubble boiling, which is the cause of an uneven heat transfer from the cast metal into the mold walls is and can cause string faults.
  • the stated object is achieved in that accelerometers are provided on the mold, preferably on at least one of the mold plates or in at least one of the coolant channels.
  • An alternative of the measuring arrangement consists in that at least one measuring device for detecting the sound pulses emitted during subcooled bubble boiling in the cooling channels is arranged on or outside the mold, which is connected to a measuring device for detecting the background noise of the coolant flow in the cooling channels and both measuring devices Components of a control loop for changing the coolant parameters of the mold work together.
  • this is achieved in 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 control variable until the signal pattern of the background noise in the casting operation is reached again without undercooled bubble boiling.
  • the possibility is created of avoiding the formation of temperature differences in the area of the bath level and thus of reducing the melting behavior of the casting powder and preventing strand defects.
  • FIG. 1 shows a broad side wall 11 and a mold 10.
  • a bore 12 on the side which receives a temperature sensor 13. This has the task of determining the current temperature of the broad side wall 11 and the mold 10 by measurement.
  • FIG. 2 shows a measuring arrangement for detecting bubble boiling in the cooling channels of the mold 10 in a continuous casting plant, not shown.
  • a transmitter 13 is connected to the control circuit 14 for detecting the sound pulses emitted in the cooling channels during supercooled bubble boiling.
  • the control circuit 14 has, as components, the measuring units 1 and 2 or controllers, which interact with changes in the coolant parameters of the mold.
  • the controller 1 receives a basic noise as the basic pattern of a sound emission in the mold in the casting operation without supercooled bubble boiling.
  • the controller 1 receives the current values for water pressure, water speed and pouring speed and sound emission from the control circuit 14 and compares the latter with the basic pattern of the sound emission of the transmitter 13 and forms control variables from the comparison of the current parameter data with the aid of the comparison units 4, 5, 6 of the controller 2 for changing the cooling parameters of the mold 10.
  • Set values for the controller 2 in the controller circuit are simultaneously applied to the comparison units 4, 5, 6.
  • the current values for casting speed, water speed and water pressure are then changed until the corresponding background noise in the mold is reached again without supercooled bubble boiling.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
EP04012297A 2003-06-27 2004-05-25 Procedé de mesure pour la détection d'ébullition dans les canaux de refroidissement d'une coquille de coulée continue Expired - Lifetime EP1491275B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10329033 2003-06-27
DE10329033A DE10329033A1 (de) 2003-06-27 2003-06-27 Verfahren und Messanordnung zum Erkennen von Blasensieden in den Kühlkanälen einer Stranggießkokille

Publications (2)

Publication Number Publication Date
EP1491275A1 true EP1491275A1 (fr) 2004-12-29
EP1491275B1 EP1491275B1 (fr) 2006-08-23

Family

ID=33395018

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04012297A Expired - Lifetime EP1491275B1 (fr) 2003-06-27 2004-05-25 Procedé de mesure pour la détection d'ébullition dans les canaux de refroidissement d'une coquille de coulée continue

Country Status (3)

Country Link
EP (1) EP1491275B1 (fr)
AT (1) ATE337119T1 (fr)
DE (2) DE10329033A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5689355A (en) * 1979-12-21 1981-07-20 Nippon Steel Corp Detection of casting state of mold for continuous casting
JPS5689356A (en) * 1979-12-21 1981-07-20 Nippon Steel Corp Detection of abnormality of mold in continuous casting
GB2068803A (en) * 1980-02-13 1981-08-19 Mannesmann Ag Monitoring of continuous casting processes to obviate breakdowns or fracture of the casting
US4542781A (en) * 1983-01-07 1985-09-24 Klockner-Werke Aktiengesellschaft Breakout warning method, utilizing acoustics, in a continuous casting installation and apparatus for its implementation
DE3632333A1 (de) * 1986-09-24 1988-03-31 Voest Alpine Ag Vorrichtung zum ueberwachen der schwingungen einer stranggiesskokille
EP0881018A2 (fr) * 1997-05-31 1998-12-02 Sms Schloemann-Siemag Aktiengesellschaft Procédé et dispositif pour mesurer et ajuster la température et la quantité d'eau de refroidissement pour parois de lingotières de coulée continue refroidies par eau
DE19838331A1 (de) * 1997-05-31 2000-03-02 Schloemann Siemag Ag Verfahren zum Messen und Regeln von Temperatur und Menge von Kühlwasser für wasserkühlbare Kokillenwände einer Stranggießkokille
EP0992304A1 (fr) * 1998-08-24 2000-04-12 Sms Schloemann-Siemag Aktiengesellschaft Procédé pour mesurer et régler la température et la quantité de l'eau de refroidissement dans les parois d'une lingotière de coulée continue

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5689355A (en) * 1979-12-21 1981-07-20 Nippon Steel Corp Detection of casting state of mold for continuous casting
JPS5689356A (en) * 1979-12-21 1981-07-20 Nippon Steel Corp Detection of abnormality of mold in continuous casting
GB2068803A (en) * 1980-02-13 1981-08-19 Mannesmann Ag Monitoring of continuous casting processes to obviate breakdowns or fracture of the casting
US4542781A (en) * 1983-01-07 1985-09-24 Klockner-Werke Aktiengesellschaft Breakout warning method, utilizing acoustics, in a continuous casting installation and apparatus for its implementation
DE3632333A1 (de) * 1986-09-24 1988-03-31 Voest Alpine Ag Vorrichtung zum ueberwachen der schwingungen einer stranggiesskokille
EP0881018A2 (fr) * 1997-05-31 1998-12-02 Sms Schloemann-Siemag Aktiengesellschaft Procédé et dispositif pour mesurer et ajuster la température et la quantité d'eau de refroidissement pour parois de lingotières de coulée continue refroidies par eau
DE19838331A1 (de) * 1997-05-31 2000-03-02 Schloemann Siemag Ag Verfahren zum Messen und Regeln von Temperatur und Menge von Kühlwasser für wasserkühlbare Kokillenwände einer Stranggießkokille
EP0992304A1 (fr) * 1998-08-24 2000-04-12 Sms Schloemann-Siemag Aktiengesellschaft Procédé pour mesurer et régler la température et la quantité de l'eau de refroidissement dans les parois d'une lingotière de coulée continue

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 0051, no. 62 (M - 092) 17 October 1981 (1981-10-17) *

Also Published As

Publication number Publication date
DE10329033A1 (de) 2005-01-13
EP1491275B1 (fr) 2006-08-23
ATE337119T1 (de) 2006-09-15
DE502004001245D1 (de) 2006-10-05

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