EP1172161A1 - Procédé et dispositif de coulée continue de métaux, en particulier d'acier - Google Patents

Procédé et dispositif de coulée continue de métaux, en particulier d'acier Download PDF

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Publication number
EP1172161A1
EP1172161A1 EP01116079A EP01116079A EP1172161A1 EP 1172161 A1 EP1172161 A1 EP 1172161A1 EP 01116079 A EP01116079 A EP 01116079A EP 01116079 A EP01116079 A EP 01116079A EP 1172161 A1 EP1172161 A1 EP 1172161A1
Authority
EP
European Patent Office
Prior art keywords
casting
analysis
mold
frequency
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.)
Withdrawn
Application number
EP01116079A
Other languages
German (de)
English (en)
Inventor
Carsten Lippold
Hans Streubel
Markus Dr. Reifferscheid
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 EP1172161A1 publication Critical patent/EP1172161A1/fr
Withdrawn legal-status Critical Current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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/166—Controlling or regulating processes or operations for mould oscillation
    • 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
    • B22D11/168—Controlling or regulating processes or operations for adjusting the mould size or mould taper
    • 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
    • B22D11/208—Controlling or regulating processes or operations for removing cast stock for aligning the guide rolls
    • 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
    • B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
    • 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
    • B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
    • B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling

Definitions

  • the invention relates to a method and an apparatus for the continuous casting of Metals, especially steel, in a continuous caster while avoiding of impermissible mold level fluctuations.
  • the mold level fluctuations occur periodically and aperiodically with constant or increasing fluctuation range.
  • the larger mold level fluctuations lead to slag and casting powder inclusions and thus to surface defects on the casting line.
  • With growing mold level fluctuations the lubricating film thickness of the pouring slag is becoming increasingly uneven. This can lead to depression or even a breakthrough.
  • the invention has for its object efficient measures and rules against to derive the mold level fluctuations that are (electrically) not in the control loop intervention.
  • the object is achieved according to the invention in that a frequency analysis
  • the mold level fluctuations are carried out by the mold level signal is transformed to the frequency level and based on the analysis results the casting and / or operating parameters are adjusted.
  • Another measure to prevent a critical mold level fluctuation is that based on the analysis results of frequency analysis the oscillation parameters of the continuous casting mold are adjusted.
  • the curve shape and / or the stroke and / or the frequency be adapted in accordance with the change in the oscillation parameters.
  • the fluctuations in the mold level are influenced in another way Measure in that based on the analysis results of the frequency analysis the bending and / or straightening device in the drive are regulated.
  • the mold level fluctuations can be minimized to the extent that that based on the analysis results of frequency analysis the water speed or the amount of water in the continuous casting mold can be changed.
  • the operating parameters are proposed according to other features, that based on the analysis results of the frequency analysis a conical employment the strand guide is adjusted. This measure can be advantageous in Sections of the soft reduction and in sections of the liquid core or also for single driven or non-driven rollers can be used.
  • the casting level fluctuations can be set to less than 3 mm. So there is the fluctuation of the bath level according to the respective steel quality in a non-critical area.
  • a device for the continuous casting of metals, in particular steel, under Avoidance of impermissible mold level fluctuations in the continuous casting mold According to the invention, the object is achieved in that for determining Analysis results through a frequency analysis of the mold level fluctuations at least one measuring element in the area of the casting mirror, a connected one Signal amplifier, one depending on the mold level signal and on the frequency level working analysis with evaluation and a decision tree provided are the system controls to the respective actuators, actuators or control elements for treating the cast strand is connected.
  • the single figure shows a block diagram with the measuring arrangement above the Continuous casting.
  • Liquid steel of various qualities is placed in the continuous casting mold 1 poured from a tundish 2 and through a pouring tube 3 and the mold level 1a continuously regulated.
  • the casting strand forming in the continuous casting mold 1 4 leaves the continuous casting mold 1 in the casting direction 5 with further cooling through the secondary cooling 6, guided by roller segments 7.
  • a sensor measures 8 mold level fluctuations caused by the processes described arise.
  • the measured values of sensor 8 are led into an amplifier 10 via measuring lines 9.
  • the Mold level signal 11 transformed to frequency level 12, e.g. according to one Fast Fourier transform (FFT) the mold level signal 11 in the frequency plane 12, converted into signals in an analysis 13a and via an evaluation 13b fed to a decision tree 14.
  • Decision tree 14 is represented by control elements 15, 16 and 17 assigned to the individual functions for casting and / or operating parameters formed.
  • FFT Fast Fourier transform
  • control member 15 is assigned to the casting parameters 18, the Control member 16 the operating parameters for the segment role 19 or the segment cooling 20 and the control member 17 of the continuous mold oscillation 21 (e.g. regarding stroke, frequency, taper, amount of coolant, oscillation curve). All control units are controlled by the system control or the system regulation 22 out.
  • the frequency analysis can deviate from the procedure described can also be carried out on the basis of other mathematical functional theories.
  • the measurement signal can also be taken from a level control instead of the sensor 8 be or from a measuring system permanently mounted in the continuous casting mold 1. Several sensors 8 can also be used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP01116079A 2000-07-11 2001-07-03 Procédé et dispositif de coulée continue de métaux, en particulier d'acier Withdrawn EP1172161A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10033655 2000-07-11
DE2000133655 DE10033655A1 (de) 2000-07-11 2000-07-11 Verfahren und Vorrichtung zum Stranggießen von Metallen, insbesondere von Stahl

Publications (1)

Publication Number Publication Date
EP1172161A1 true EP1172161A1 (fr) 2002-01-16

Family

ID=7648542

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01116079A Withdrawn EP1172161A1 (fr) 2000-07-11 2001-07-03 Procédé et dispositif de coulée continue de métaux, en particulier d'acier

Country Status (2)

Country Link
EP (1) EP1172161A1 (fr)
DE (1) DE10033655A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2059357A1 (fr) * 2006-08-28 2009-05-20 Nucor Corporation Identification et réduction des défauts dans une bande mince de coulée
DE102009011849A1 (de) 2009-03-05 2010-09-09 Sms Siemag Aktiengesellschaft Verfahren und Vorrichtung zum Stranggießen von Metallen, insbesondere von Stahl

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02192863A (ja) * 1989-01-20 1990-07-30 Sumitomo Metal Ind Ltd 連続鋳造用鋳型の湯面レベル制御方法
JPH105957A (ja) * 1996-06-26 1998-01-13 Nkk Corp 連続鋳造鋳型内における溶鋼流動検知方法及び制御方法
JPH10146658A (ja) * 1996-11-18 1998-06-02 Nippon Steel Corp 連続鋳造における鋳型内湯面レベル制御方法
JPH1177268A (ja) * 1997-06-25 1999-03-23 Nkk Corp 連続鋳造機モールド内湯面レベル制御方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02192863A (ja) * 1989-01-20 1990-07-30 Sumitomo Metal Ind Ltd 連続鋳造用鋳型の湯面レベル制御方法
JPH105957A (ja) * 1996-06-26 1998-01-13 Nkk Corp 連続鋳造鋳型内における溶鋼流動検知方法及び制御方法
JPH10146658A (ja) * 1996-11-18 1998-06-02 Nippon Steel Corp 連続鋳造における鋳型内湯面レベル制御方法
JPH1177268A (ja) * 1997-06-25 1999-03-23 Nkk Corp 連続鋳造機モールド内湯面レベル制御方法

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 199832, Derwent World Patents Index; Class M22, AN 1998-370273, XP002181099 *
PATENT ABSTRACTS OF JAPAN vol. 014, no. 478 (M - 1036) 18 October 1990 (1990-10-18) *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 05 30 April 1998 (1998-04-30) *
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 08 30 June 1999 (1999-06-30) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2059357A1 (fr) * 2006-08-28 2009-05-20 Nucor Corporation Identification et réduction des défauts dans une bande mince de coulée
US7650925B2 (en) 2006-08-28 2010-01-26 Nucor Corporation Identifying and reducing causes of defects in thin cast strip
EP2059357A4 (fr) * 2006-08-28 2013-04-03 Nucor Corp Identification et réduction des défauts dans une bande mince de coulée
DE102009011849A1 (de) 2009-03-05 2010-09-09 Sms Siemag Aktiengesellschaft Verfahren und Vorrichtung zum Stranggießen von Metallen, insbesondere von Stahl

Also Published As

Publication number Publication date
DE10033655A1 (de) 2002-01-24

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