EP0997203A1 - Procédé et système pour contrôler des lignes de refroidissement - Google Patents

Procédé et système pour contrôler des lignes de refroidissement Download PDF

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Publication number
EP0997203A1
EP0997203A1 EP99119331A EP99119331A EP0997203A1 EP 0997203 A1 EP0997203 A1 EP 0997203A1 EP 99119331 A EP99119331 A EP 99119331A EP 99119331 A EP99119331 A EP 99119331A EP 0997203 A1 EP0997203 A1 EP 0997203A1
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EP
European Patent Office
Prior art keywords
cooling
strip
temperature
cooling section
temperature curve
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
EP99119331A
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German (de)
English (en)
Other versions
EP0997203B1 (fr
Inventor
Siegfried Latzel
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
SMS Demag AG
Schloemann Siemag AG
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Application filed by SMS Schloemann Siemag AG, SMS Demag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP0997203A1 publication Critical patent/EP0997203A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • B21B37/76—Cooling control on the run-out table
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00—Process control or regulation for heat treatments
    • C21D11/005—Process control or regulation for heat treatments for cooling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling

Definitions

  • the invention relates to a method and a system for regulation a cooling section, in particular the cooling section Plant for rolling steel sheets and strips.
  • Cooling systems While the requirements for geometric dimensions, the surface quality and mechanical properties of hot-rolled strips is constantly increasing, growing at the same time the desire for greater flexibility in production facilities for a variety of different steels. There is therefore a need for automatically working Cooling systems, the exact temperature profiles as well as various Cooling strategies, i.e. Cooling processes, with high flexibility and ensure simultaneous production of high quality steels.
  • the classic concept is the modeling of the Entire system in the form of ideal band points.
  • the modeling of a band point takes into account that the band point through heat conduction, convection and radiation Exchanges energy with the environment. Furthermore, through structural transformation produces internal energy.
  • For modeling of the band point becomes the transient in the band thickness direction one-dimensional heat conduction equation solved by FOURIER.
  • the location of the serves as the geometric limit of the modeling Prefabricated street pyrometer, i.e. the entry point of the imagined Band point in the cooling section, as well as the installation site of the reel pyrometer. Between these two places the target temperature can be achieved through locally distributed control interventions of the tape can be adjusted.
  • the model adaptation serves the purpose of predicting accuracy to increase the cooling model.
  • the Calculation result of the model constantly with the actual, measured cooling results compared and error minimization carried out.
  • this classic concept shows the disadvantage that a large number due to the integration of the band segments of data must be determined and processed.
  • the steep systems of the cooling device for example the local one Distribution of the cooling water and the number of actuated Chilled beams, not flexible and adjustable quickly enough. There is therefore a risk that tape sections at a rapid change of the belt speed supercooled or be overheated.
  • the proposed method is based on the basic idea the overall system of the cooling section is not a sum of individual ones Band points or segments to consider, but the temperature state of the belt over the length of the cooling section, i.e. the temperature curve falling due to the influence of cooling, using a mathematical process model continuously to calculate or observe this temperature curve to compare with a reference temperature curve and the control deviations over the cooling section length individually to settle.
  • the model on which the calculation is based is preferably continuously adapted here.
  • the strip temperature curve is calculated here realistic. Based on the preferably minimized errors
  • the reference temperature curve is calculated in advance of the model.
  • process parameters iS. of claim 1 understood the current settings of the cooling section. This are, for example, the number of activated chilled beams and / or the amount or speed of the cooling water as well as the cooling water temperature.
  • the regulation of these actuators the cooling section is done individually and in adaptation to the reference temperature curve and thus allows one greater speed and flexibility of the individual actuators.
  • the specific process status understood the properties of the strip to be cooled, like the belt speed, the belt thickness, the finishing train temperature or the material properties of the tape.
  • the specifically measured temperature measured value T measured or the predetermined reference temperature T ref is preferably the actual or target temperature of the goods to be cooled shortly before entering the reel device or at the outlet of the cooling device. It is thus achieved by means of the proposed control method to set reel temperatures with low temperature tolerances and to largely compensate for differences in the speed and finish rolling temperature values over the strip length.
  • the cooling section preferably comprises a plurality of cooling devices.
  • upper and lower actuators of the cooling devices independently of each other for separate cooling of the The top and bottom of the belt can be regulated.
  • a pre-calculation is proposed of the expected strip temperature curve depending on the specific process state of the goods to be cooled before Entry into the cooling section before the actual control process perform.
  • this upstream Setup calculation of the strip temperature curve becomes an operating point created for the subsequent control process, which makes it faster.
  • thermophysical and fluid dynamic Relationships By including thermophysical and fluid dynamic Relationships is an exact process image in the control cycle guaranteed.
  • FIG. 1 shows a schematic overview of a laminar belt cooling system 1, which is on the exit roller table of a hot rolling wide strip mill between the last mill stand 2 Finishing line and the driver 3a or reel 3b is located.
  • the Belt cooling system consists of several cooling devices 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h and 1i together, which are independent from each other and their actuators with respect to The top and bottom of the belt can be regulated separately.
  • a first pyrometer 5 is provided for measuring the strip temperature.
  • a second pyrometer 6 is located just before Driver 3a or reel 3b.
  • a strip temperature curve is calculated (observed) using the cooling model, and the measured reel temperature T measured is compared with the corresponding calculated temperature T calc .
  • the measured reel temperature T meas is the strip temperature which is measured with the aid of the pyrometer 6.
  • T calc is the corresponding discrete temperature value on the observed temperature curve .
  • the model is also adapted and handed over the calculated temperature profile to the temperature controller.
  • the control process is preceded by a setup calculation.
  • the strip temperature curve depending on the specific process state of the goods to be cooled before Pre-calculated entry into the cooling section. This predicted The strip temperature curve serves during the rolling process as a working point for temperature control.
  • Figure 2 represents the one calculated by means of the model, i.e. observed Course of the strip temperature [° C] over the strip length [m].
  • This first step of the control loop concerns the calculation of the strip temperature curve in the cooling section between pyrometers 5 and 6 depending on the current set process parameters using a model, i.e. the so-called "observation”.
  • the cooling curve shows in the Example a relatively strong drop in the area of the first four activated cooling devices 1a, 1b, 1c, 1d, and then slowly fall away.
  • a specific final temperature value T meas is measured at a defined point on the strip after passing through the cooling section.
  • the end temperature value is preferably the temperature of the strip just before it enters the reel device 3b. It is measured using the reel pyrometer 6.
  • the strip temperature at the height of the reel depends essentially depends on the material quality to be generated and moves usually in a range from 250 to 750 ° C.
  • the model is adapted to minimize errors (cf. FIG. 3). This adaptation is done by a suitable change in the model parameters, so that an adapted curve shape is formed on which the measured reel temperature lies.
  • a reference temperature curve is calculated on the basis of a predetermined reference temperature T ref , usually a desired reel temperature.
  • T ref a predetermined reference temperature
  • This curve is based on the same initial value as the first calculated temperature curve, but on a different final value, ie the reference value T ref .
  • each cooling zone By comparing the calculated temperature profile with the An individual control is made for the reference temperature curve each cooling zone, separately for the top and bottom of the belt. This regulation takes place by means of the actuators the cooling devices of the cooling device.
  • Figure 5 shows schematically the units of the system for performing the proposed method.
  • the temperature state of the strip within the cooling section is continuously observed or calculated. If a deviation between the calculated and measured reel temperature is determined, the model is adapted, ie the calculated reel temperature is compared with the specific measured value T meas .
  • a process monitor controller is provided that the entire system with conventional control engineering methods, for example with an I controller, if Despite adaptation of the model, there is still a deviation in the achieved from the specified reel temperature.
  • the process monitor compensates for faults that are not measurable and malfunctions of the overall system and thus represents a perfect product quality by comparing the reference and the currently measured reel temperature.
  • each cooling zone by comparison with the associated reference value can be regulated individually if the current course of the strip temperature over the strip length is known within the cooling section. That means that for any number of discrete location coordinates within the Cooling section the temperature state of the belt at all times must be known. The course of the strip temperature is not measurable within the cooling section, but must be modeled be calculated or observed.
  • Model for calculating the temperature profile of the belt in the cooling section is based on the following thermodynamic and fluid engineering basics.
  • the rolling process is thermodynamically an unsteady flow process adopted in an open system. If the finishing street pyrometer, the reel pyrometer as well as the band upper and bottom as thermodynamic system limits of the cooling section selected, mass flows on the finishing street pyrometer as well Energy in the form of enthalpy in the system, on the reel pyrometer Mass and energy in the form of enthalpy from the system and energy in the form of heat on the top and bottom of the belt out of the system. It is also assumed that the Cooling section can be divided into any number of sub-processes can that the overall thermodynamic system consists of a Chain of sub-processes and that for each sub-process the energy and mass balance must be fulfilled.
  • the mass balance for a sub-process is as follows.
  • the mass of the fixed system produced or destroyed per unit of time can only be obtained by changing the density over time.
  • H (T) p ⁇ (T) ⁇ H ⁇ (T) + p ⁇ (T) ⁇ H ⁇ ( T )
  • equations (1.8) and (1.19) result in a system of coupled differential equations.
  • the use of, for example, difference expressions provides a network for calculating the temperature state over the length coordinate z 1 and strip thickness coordinate z 2 .
  • the temperature network is discretized in the longitudinal and thickness directions with non-equidistant distances from node to node (FIG. 7).

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Control Of Metal Rolling (AREA)
  • Control Of Heat Treatment Processes (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP99119331A 1998-10-31 1999-09-29 Procédé et système pour contrôler des lignes de refroidissement Expired - Lifetime EP0997203B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19850253 1998-10-31
DE19850253A DE19850253A1 (de) 1998-10-31 1998-10-31 Verfahren und System zur Regelung von Kühlstrecken

Publications (2)

Publication Number Publication Date
EP0997203A1 true EP0997203A1 (fr) 2000-05-03
EP0997203B1 EP0997203B1 (fr) 2004-02-11

Family

ID=7886274

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Application Number Title Priority Date Filing Date
EP99119331A Expired - Lifetime EP0997203B1 (fr) 1998-10-31 1999-09-29 Procédé et système pour contrôler des lignes de refroidissement

Country Status (6)

Country Link
US (1) US6185970B1 (fr)
EP (1) EP0997203B1 (fr)
JP (1) JP5059254B2 (fr)
AT (1) ATE259262T1 (fr)
DE (2) DE19850253A1 (fr)
ES (1) ES2216402T3 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1111074A2 (fr) * 1999-12-23 2001-06-27 SMS Demag AG Procédé et dispostif de refroidissement de profilés laminés à chaud
WO2003000940A1 (fr) * 2001-06-20 2003-01-03 Siemens Aktiengesellschaft Procede de refroidissement d'un produit lamine a chaud et modele de ligne de refroidissement correspondant
WO2005076092A1 (fr) * 2004-02-06 2005-08-18 Siemens Aktiengesellschaft Procede de modelisation assiste par ordinateur pour le comportement d'un volume d'acier presentant une surface volumetrique
WO2009141205A1 (fr) 2008-05-21 2009-11-26 Siemens Vai Metals Technologies Gmbh & Co. Procédé de coulée continue d'une barre métallique
EP1596999B2 (fr) † 2003-02-25 2011-05-25 Siemens Aktiengesellschaft Procede de regulation de la temperature d'une bande metallique, en particulier dans un parcours de refroidissement
WO2011138159A1 (fr) * 2010-05-04 2011-11-10 Siemens Vai Metals Technologies Gmbh Procédé de laminage à chaud de bandes d'acier et train de laminage à chaud
WO2012107143A1 (fr) * 2011-02-07 2012-08-16 Siemens Vai Metals Technologies Gmbh Procédé de régulation d'une température d'une barre de coulée par positionnement d'une buse de refroidissement déplaçable dans un dispositif de guidage de barres de coulée d'une installation de coulée continue
CN104226699A (zh) * 2014-08-21 2014-12-24 南京钢铁股份有限公司 一种层流冷却正、负反馈的闭环控制方法
EP2921239A1 (fr) * 2014-03-21 2015-09-23 Siemens VAI Metals Technologies GmbH Refroidissement d'un produit de laminage laminé à chaud
EP3395463A1 (fr) * 2017-04-26 2018-10-31 Primetals Technologies Austria GmbH Refroidissement d'un laminé

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10042386A1 (de) 2000-08-29 2002-03-28 Siemens Ag Verfahren zur Bestimmung der thermischen Materialeigenschaften von Metall-Formteilen
DE10137596A1 (de) * 2001-08-01 2003-02-13 Sms Demag Ag Verfahren zur Kühlung von Werkstücken, insbesondere von Profilwalzprodukten, aus Schienenstählen
DE10156008A1 (de) * 2001-11-15 2003-06-05 Siemens Ag Steuerverfahren für eine einer Kühlstrecke vorgeordnete Fertigstraße zum Walzen von Metall-Warmband
DE10203787A1 (de) * 2002-01-31 2003-08-14 Siemens Ag Verfahren zur Regelung eines industriellen Prozesses
CN1329133C (zh) * 2003-02-25 2007-08-01 西门子公司 尤其在轧制金属热轧带材的精轧机列中调节金属带温度的方法
US7310981B2 (en) * 2003-02-25 2007-12-25 Siemens Aktiengesellschaft Method for regulating the temperature of strip metal
DE10339191A1 (de) * 2003-08-22 2005-03-17 Sms Demag Ag Coilbox zwischen Vorstraße und Fertigstraße im Warmwalzwerk
JP4767544B2 (ja) * 2005-01-11 2011-09-07 新日本製鐵株式会社 鋼板の冷却制御方法
DE102005053489C5 (de) * 2005-11-09 2008-11-06 Siemens Ag Regelungssystem und Regelungsverfahren für eine industrielle Einrichtung
DE102010001203B4 (de) * 2010-01-26 2011-12-08 Ford Global Technologies, Llc Regelungsanordnung sowie -verfahren
BR112012024915B1 (pt) 2010-07-22 2020-12-15 Nippon Steel Corporation Sistema de resfriamento de chapa de aço e método de resfriamento de chapa de aço
EP2644718A1 (fr) 2012-03-27 2013-10-02 Siemens Aktiengesellschaft Procédé de stabilisation de pression
JP5825250B2 (ja) * 2012-12-25 2015-12-02 Ｊｆｅスチール株式会社 熱延鋼帯の冷却方法および冷却装置
EP2873469A1 (fr) 2013-11-18 2015-05-20 Siemens Aktiengesellschaft Procédé de fonctionnement pour une voie de refroidissement
CN106282533B (zh) * 2015-05-27 2018-01-26 宝山钢铁股份有限公司 一种加热炉的待轧温度控制方法
CA3047511C (fr) * 2016-12-20 2022-04-26 Arcelormittal Procede de reglage dynamique pour la fabrication d'une tole d'acier traitee thermiquement
JP7058182B2 (ja) * 2018-06-08 2022-04-21 株式会社日立製作所 目標温度履歴作成装置、目標温度履歴作成方法およびプログラム

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EP0829548A2 (fr) * 1996-09-16 1998-03-18 MANNESMANN Aktiengesellschaft Procédé de refroidissement contrÔlé de bandes laminés à chaud ou de tÔles fortes à l'aide d'un modèle dans un procédé de laminage et refroidissement contrÔle par ordinateur
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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1111074A2 (fr) * 1999-12-23 2001-06-27 SMS Demag AG Procédé et dispostif de refroidissement de profilés laminés à chaud
EP1111074A3 (fr) * 1999-12-23 2004-01-07 SMS Demag AG Procédé et dispostif de refroidissement de profilés laminés à chaud
WO2003000940A1 (fr) * 2001-06-20 2003-01-03 Siemens Aktiengesellschaft Procede de refroidissement d'un produit lamine a chaud et modele de ligne de refroidissement correspondant
US6860950B2 (en) 2001-06-20 2005-03-01 Siemens Aktiengesellschaft Method for cooling a hot-rolled material and corresponding cooling-line models
EP1596999B2 (fr) † 2003-02-25 2011-05-25 Siemens Aktiengesellschaft Procede de regulation de la temperature d'une bande metallique, en particulier dans un parcours de refroidissement
WO2005076092A1 (fr) * 2004-02-06 2005-08-18 Siemens Aktiengesellschaft Procede de modelisation assiste par ordinateur pour le comportement d'un volume d'acier presentant une surface volumetrique
US7865341B2 (en) 2004-02-06 2011-01-04 Siemens Aktiengesellschaft Computer-assisted modelling method for the behavior of a steel volume having a volumetric surface
WO2009141205A1 (fr) 2008-05-21 2009-11-26 Siemens Vai Metals Technologies Gmbh & Co. Procédé de coulée continue d'une barre métallique
WO2011138159A1 (fr) * 2010-05-04 2011-11-10 Siemens Vai Metals Technologies Gmbh Procédé de laminage à chaud de bandes d'acier et train de laminage à chaud
WO2012107143A1 (fr) * 2011-02-07 2012-08-16 Siemens Vai Metals Technologies Gmbh Procédé de régulation d'une température d'une barre de coulée par positionnement d'une buse de refroidissement déplaçable dans un dispositif de guidage de barres de coulée d'une installation de coulée continue
EP2921239A1 (fr) * 2014-03-21 2015-09-23 Siemens VAI Metals Technologies GmbH Refroidissement d'un produit de laminage laminé à chaud
WO2015139916A1 (fr) * 2014-03-21 2015-09-24 Primetals Technologies Austria GmbH Refroidissement d'un produit de laminage laminé à chaud
CN104226699A (zh) * 2014-08-21 2014-12-24 南京钢铁股份有限公司 一种层流冷却正、负反馈的闭环控制方法
CN104226699B (zh) * 2014-08-21 2016-01-27 南京钢铁股份有限公司 一种层流冷却正、负反馈的闭环控制方法
EP3395463A1 (fr) * 2017-04-26 2018-10-31 Primetals Technologies Austria GmbH Refroidissement d'un laminé
WO2018197100A3 (fr) * 2017-04-26 2018-12-27 Primetals Technologies Austria GmbH Refroidissement d'un produit laminé
US11358195B2 (en) 2017-04-26 2022-06-14 Primetals Technologies Austria GmbH Cooling of rolled matertial
US11786949B2 (en) 2017-04-26 2023-10-17 Primetals Technologies Austria GmbH Cooling of rolled material

Also Published As

Publication number Publication date
EP0997203B1 (fr) 2004-02-11
JP5059254B2 (ja) 2012-10-24
DE19850253A1 (de) 2000-05-04
ATE259262T1 (de) 2004-02-15
US6185970B1 (en) 2001-02-13
ES2216402T3 (es) 2004-10-16
DE59908504D1 (de) 2004-03-18
JP2000135507A (ja) 2000-05-16

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