EP0885675A1 - Méthode et appareil de prédiction de rupture en coulée continu d'acier avec une lingotière oscillante - Google Patents

Méthode et appareil de prédiction de rupture en coulée continu d'acier avec une lingotière oscillante Download PDF

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Publication number
EP0885675A1
EP0885675A1 EP98110735A EP98110735A EP0885675A1 EP 0885675 A1 EP0885675 A1 EP 0885675A1 EP 98110735 A EP98110735 A EP 98110735A EP 98110735 A EP98110735 A EP 98110735A EP 0885675 A1 EP0885675 A1 EP 0885675A1
Authority
EP
European Patent Office
Prior art keywords
mold
oscillation
strand
breakthrough
measurement data
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
EP98110735A
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German (de)
English (en)
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EP0885675B1 (fr
Inventor
Fritz-Peter Prof. Dr.-Ing. Pleschiutschnigg
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 Schloemann Siemag AG
Schloemann Siemag AG
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Publication of EP0885675A1 publication Critical patent/EP0885675A1/fr
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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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/053—Means for oscillating the moulds
    • 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
    • B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass

Definitions

  • the invention relates to a method and an apparatus for Breakthrough early detection in the continuous casting of steel with a Copper plates trained, oscillating mold, by continuous and comparative measurement of operating parameters, e.g. the local and temporal temperature distribution in the copper plates with analysis of the measurement data obtained.
  • Another method is using accelerometers tries to breakdown-relevant disorders in the form of movement with respect to three spatial axes during the mold oscillation capture. Deficiencies in this system occur in that it does Measurements do not always have a clear breakthrough with high probability capture. This has the consequence that the measuring system before a breakthrough either triggers false alarms or an alarm is given late or not at all.
  • a plate mold for slabs is known from DE 24 15 224 C3, whose mold walls have cooling chambers that have limited cooling areas include.
  • At the water supply and drain lines of the broadsides are Measuring elements for determining the amount of heat dissipated or Cooling capacities connected. Furthermore, in the measuring elements at the same time an average value of the cooling capacity of the cooling chambers formed, which is fed to an averager, with which the conicity of the narrow sides can be controlled. A Breakthrough early detection with satisfactory accuracy not feasible due to the measurement of the heat flows in the mold.
  • An acceleration measurement of the mold is also possible with the help of known at least three accelerometers on the mold, the deviations in the mold movement (wobble) as a breakthrough criterion capture.
  • the present invention is based on the aforementioned prior art the task of a method and a device for early breakthrough detection state with the highest possible probability for a precise assessment of signs of a acute breakthrough tendency in the continuous casting of steel enables becomes.
  • the method and the device should be as extensive as possible be feasible with known means and measuring devices.
  • the problem is solved with a method for early breakthrough detection in the continuous casting of steel that in the preamble of Claim 1 type with the invention in that to increase the probability of a precise assessment of signs an acute breakthrough tendency two measurement data to be compared both with each other and with measurement data from at least one third series of measurements are coupled and preferably analyzed online will.
  • This partial adhesion or the effect of the lubrication between the mold and the strand can be determined, for example, with the aid of a line scan camera.
  • an embodiment of the invention provides that comparative measurements of mold oscillation and strand oscillation on different circumferential areas of mold and strand be performed.
  • a corresponding design of the method therefore provides that at different circumferential areas of the mold or Strange occurring disturbances in the uniformity of the friction through comparative measurements of the strand circumference or the Strand width can be localized.
  • an embodiment of the invention provides that the mold oscillation and the strand oscillation to be compared with it preferably measured at the four corner points of the mold, and continuously compared and analyzing disruptions Measured data obtained in an electronic evaluation system recognized and with predetermined, breakthrough-relevant signals compared and at recognizable breakthrough trend measures to prevent a Breakthrough.
  • a lowering the casting speed and / or a change in the addition quantity or Composition of the lubricant can be made.
  • Critical cases can be a combination of both measures to be brought.
  • the observation of the strand oscillation can be expediently used a line scan camera. Then the Appearance used that on the outside of the strand shell due to oscillation Markings are visible when the corresponding Setting can be recognized and evaluated by the line scan camera. As already stated at the beginning, can increase the probability an accurate assessment of signs of acute Breakthrough tendency an evaluation of the measurement results of the mold and Strand movement on the one hand and the temperature field in the Mold plates or the path-time behavior of the mold movement on the other hand, be coupled.
  • the evaluation computing unit 30 As soon as the evaluation computing unit 30 is a dangerous breakthrough Combination of measurement data from the individual electronic evaluation units 20-22, it generates an early warning pulse and passes this on to the signal generator 31, which in turn, symbolized by the number 100, initiates a countermeasure, For example, on actuators to reduce the casting speed 13 or acts to the increased task of lubricants 40.
  • Figure 1 further shows a cylindrical immersion pouring tube 4 Task of liquid steel 41 and from the bottom of the Mold 1 emerging casting strand 6 with clearly recognizable oscillation markings 7 on its scope.
  • accelerometers 10.1 to 10.4 are arranged and firmly connected to the top of the mold 1.
  • These accelerometers the measuring lines 15.1 to 15.4 are assigned and the Evaluation electronics 20 switched on.
  • these are Evaluation electronics 20 also the signals of the vibration exciter 5 connected with the measuring lines 25.1 and 25.2, causing interference in the path-time behavior of the mold movement in deviation from the forcibly induced oscillation excitation of the oscillators 5 can be detected.
  • FIG. 2 shows two oscillograms A and B.
  • Oscillogram A shows the typical course of a disturbance in the path-time behavior of the mold 1, for example as a result of a disturbance in the uniformity of the friction between the mold and the strand.
  • the oscillogram B shows a reciprocal vibration behavior of the cast strand 6.
  • Figure 3 shows the oscillogram C for a normal mold oscillation and the oscillogram D for normal strand oscillation without interference.
  • C1 there is a noticeable oscillation of the Drawn mold.
  • D1 there is a striking oscillation drawn.
  • Using the hatched fields C-D between normal oscillation C of the mold and normal oscillation D of the cast strand can be deduced that normal lubrication behavior or a normal partial adhesion that is to be expected according to the design is present between the mold and the strand shell.
  • the hatched field C1 - D1 shows a breakthrough criterion, because of a conspicuous lubrication behavior (defective lubrication) or an increased partial adhesion between the mold and the strand shell with a high probability of a change in the field C-D towards C1 - D1.
  • the early warning signal generator 31 would then, for example, reduce the casting speed 13 with a command to the actuators 100, for example by means of the roller drive of the continuous casting installation, and at the same time change the lubricant application 40 in the sense of more effective lubrication.
  • the time-controlled decrease in the casting speed can take place between 50% and 100% for a maximum time of 2 minutes. In this way, an actual breakthrough of liquid steel could be reliably prevented by a targeted early warning. If the breakthrough is prevented, the strand is accelerated to the desired speed in a controlled manner.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
EP98110735A 1997-06-16 1998-06-12 Méthode et appareil de prédiction de rupture en coulée continu d'acier avec une lingotière oscillante Expired - Lifetime EP0885675B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19725433 1997-06-16
DE19725433A DE19725433C1 (de) 1997-06-16 1997-06-16 Verfahren und Vorrichtung zur Durchbruchfrüherkennung beim Stranggießen von Stahl mit einer oszillierenden Kokille

Publications (2)

Publication Number Publication Date
EP0885675A1 true EP0885675A1 (fr) 1998-12-23
EP0885675B1 EP0885675B1 (fr) 2002-10-30

Family

ID=7832636

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98110735A Expired - Lifetime EP0885675B1 (fr) 1997-06-16 1998-06-12 Méthode et appareil de prédiction de rupture en coulée continu d'acier avec une lingotière oscillante

Country Status (7)

Country Link
US (1) US6179041B1 (fr)
EP (1) EP0885675B1 (fr)
JP (1) JPH1177264A (fr)
KR (1) KR19990006983A (fr)
AT (1) ATE226860T1 (fr)
DE (2) DE19725433C1 (fr)
DK (1) DK0885675T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10108730A1 (de) * 2001-02-23 2002-09-12 Thyssenkrupp Stahl Ag Vorrichtung und ein Verfahren zum Erkennen der Gefahr eines Durchbruchs des Stahlstrangs beim Stranggießen von Stahl
DE10312923B3 (de) * 2003-03-22 2004-10-07 Sms Demag Ag Verfahren zum Bestimmen der Mess-Temperaturen in Stranggießkokillen und Stranggießkokille selbst
WO2009149680A1 (fr) * 2008-06-13 2009-12-17 Sms Siemag Aktiengesellschaft Procédé de prévision de la formation de fissures longitudinales lors d’une coulée continue
CN101642801B (zh) * 2008-08-07 2011-08-24 上海重矿连铸技术工程有限公司 连铸结晶器的振动方法
CN110523941A (zh) * 2019-08-06 2019-12-03 北京数钰科技发展有限公司 连铸粘结漏钢多级风险控制方法及控制装置

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MXPA00002784A (es) * 1998-07-21 2005-08-16 Dofasco Inc Sistema basado en modelo estadistco multivariado pra verificar la operacion de un fundidor continuo y detectar la aparicion de rebabas por rotura de molde inminentes.
DE19843033B4 (de) * 1998-09-19 2017-11-09 Sms Group Gmbh Durchbrucherkennungsverfahren für eine Stranggießkokille
WO2000051762A1 (fr) * 1999-03-02 2000-09-08 Nkk Corporation Procede et dispositif permettant, en coulee continue, de predire et de reguler la configuration d'ecoulement de l'acier en fusion
DE19915269A1 (de) * 1999-04-03 2000-10-26 Sms Demag Ag Verfahren zur Bestimmung der Reibung zwischen Strangschale und Kokille beim Stranggießen
DE10027324C2 (de) * 1999-06-07 2003-04-10 Sms Demag Ag Verfahren zum Gießen eines metallischen Strangs sowie System hierzu
ES2238224T3 (es) * 1999-07-06 2005-09-01 Sms Demag Ag Procedimiento y sistema para controlar el caldo en una maquina de colada en cuerda.
EP1149648B1 (fr) * 2000-04-25 2005-07-20 SMS Demag AG Procédé et dispositif pour le contrôle thermique d'une lingotière de coulée continue
KR20030037339A (ko) * 2001-11-01 2003-05-14 주식회사 포스코 연속주조 주형감시장치
KR100488758B1 (ko) * 2001-12-22 2005-05-11 주식회사 포스코 연속 주조기의 주형 진동 특성 진단 장치 및 그 방법
CA2414167A1 (fr) * 2002-12-12 2004-06-12 Dofasco Inc. Methode et systeme en ligne de surveillance de l'operation initiale d'une machine a coulee continue et de prevision des ruptures par rapport a cette operation
US6885907B1 (en) 2004-05-27 2005-04-26 Dofasco Inc. Real-time system and method of monitoring transient operations in continuous casting process for breakout prevention
JP6699631B2 (ja) * 2017-07-04 2020-05-27 Ｊｆｅスチール株式会社 鋳型振動監視方法及びブレークアウト監視方法
EP3878574A1 (fr) 2020-03-13 2021-09-15 Primetals Technologies Austria GmbH Détermination de l'état des rouleaux de guidage de barre par évaluation des vibrations

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5732866A (en) * 1980-08-05 1982-02-22 Kawasaki Steel Corp Method and device for foreseeing breakout in continuous casting
JPS57124563A (en) * 1981-01-28 1982-08-03 Nippon Steel Corp Control device for continuous casting
JPS57190760A (en) * 1981-05-18 1982-11-24 Mitsubishi Heavy Ind Ltd Foreseeing method for breakout
JPS6418553A (en) * 1987-07-13 1989-01-23 Kawasaki Steel Co Instrument for detecting friction force between mold and cast slab in continuous casting apparatus
DE3806583A1 (de) * 1988-02-26 1989-09-07 Mannesmann Ag Verfahren an einer giessanlage zur erzeugung von straengen
EP0389139A2 (fr) * 1989-03-20 1990-09-26 Inland Steel Company Découverte de rupture en coulée continue
DE4442087A1 (de) * 1994-11-25 1996-05-30 Siemens Ag Einrichtung zur Durchbruch-Früherkennung beim Stranggießen

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JPS5647245A (en) * 1979-09-25 1981-04-28 Nippon Kokan Kk <Nkk> Continuous casting method
JPS59125248A (ja) * 1983-01-05 1984-07-19 Kawasaki Steel Corp 連続鋳造における鋳型潤滑制御方法
US4532975A (en) * 1983-04-28 1985-08-06 United States Steel Corporation Continuous casting mold oscillator load indication system
WO1985004125A1 (fr) * 1984-03-19 1985-09-26 Amb Technology, Inc. Procede et appareil pour la coulee continue de metal
AU562731B2 (en) * 1985-02-01 1987-06-18 Nippon Steel Corporation Preventtion of casting defects in continuous casting
JPS61279350A (ja) * 1985-06-05 1986-12-10 Kawasaki Steel Corp 鋼の連続鋳造制御方法
US4949777A (en) * 1987-10-02 1990-08-21 Kawasaki Steel Corp. Process of and apparatus for continuous casting with detection of possibility of break out
DE4117073A1 (de) * 1991-05-22 1992-11-26 Mannesmann Ag Temperaturmessung brammenkokille
DE19529931C1 (de) * 1995-08-02 1997-04-03 Mannesmann Ag Plattenkokille zur Erzeugung von Strängen aus Stahl

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5732866A (en) * 1980-08-05 1982-02-22 Kawasaki Steel Corp Method and device for foreseeing breakout in continuous casting
JPS57124563A (en) * 1981-01-28 1982-08-03 Nippon Steel Corp Control device for continuous casting
JPS57190760A (en) * 1981-05-18 1982-11-24 Mitsubishi Heavy Ind Ltd Foreseeing method for breakout
JPS6418553A (en) * 1987-07-13 1989-01-23 Kawasaki Steel Co Instrument for detecting friction force between mold and cast slab in continuous casting apparatus
DE3806583A1 (de) * 1988-02-26 1989-09-07 Mannesmann Ag Verfahren an einer giessanlage zur erzeugung von straengen
EP0389139A2 (fr) * 1989-03-20 1990-09-26 Inland Steel Company Découverte de rupture en coulée continue
DE4442087A1 (de) * 1994-11-25 1996-05-30 Siemens Ag Einrichtung zur Durchbruch-Früherkennung beim Stranggießen

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PATENT ABSTRACTS OF JAPAN vol. 006, no. 220 (M - 169) 5 November 1982 (1982-11-05) *
PATENT ABSTRACTS OF JAPAN vol. 007, no. 041 (M - 194) 18 February 1983 (1983-02-18) *
PATENT ABSTRACTS OF JAPAN vol. 013, no. 193 (M - 822) 9 May 1989 (1989-05-09) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10108730A1 (de) * 2001-02-23 2002-09-12 Thyssenkrupp Stahl Ag Vorrichtung und ein Verfahren zum Erkennen der Gefahr eines Durchbruchs des Stahlstrangs beim Stranggießen von Stahl
DE10108730C2 (de) * 2001-02-23 2003-01-30 Thyssenkrupp Stahl Ag Vorrichtung und ein Verfahren zum Erkennen der Gefahr eines Durchbruchs des Stahlstrangs beim Stranggießen von Stahl
DE10312923B3 (de) * 2003-03-22 2004-10-07 Sms Demag Ag Verfahren zum Bestimmen der Mess-Temperaturen in Stranggießkokillen und Stranggießkokille selbst
DE10312923B8 (de) * 2003-03-22 2005-07-14 Sms Demag Ag Verfahren zum Bestimmen der Mess-Temperaturen in Stranggießkokillen und Stranggießkokille selbst
WO2009149680A1 (fr) * 2008-06-13 2009-12-17 Sms Siemag Aktiengesellschaft Procédé de prévision de la formation de fissures longitudinales lors d’une coulée continue
US8649986B2 (en) 2008-06-13 2014-02-11 Sms Siemag Ag Process for predicting the emergence of longitudinal cracks during continuous casting
CN101642801B (zh) * 2008-08-07 2011-08-24 上海重矿连铸技术工程有限公司 连铸结晶器的振动方法
CN110523941A (zh) * 2019-08-06 2019-12-03 北京数钰科技发展有限公司 连铸粘结漏钢多级风险控制方法及控制装置

Also Published As

Publication number Publication date
ATE226860T1 (de) 2002-11-15
KR19990006983A (ko) 1999-01-25
DE19725433C1 (de) 1999-01-21
DK0885675T3 (da) 2002-11-25
EP0885675B1 (fr) 2002-10-30
US6179041B1 (en) 2001-01-30
JPH1177264A (ja) 1999-03-23
DE59806092D1 (de) 2002-12-05

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