EP3642372A1 - Method for operating an annealing surface - Google Patents

Method for operating an annealing surface

Info

Publication number
EP3642372A1
EP3642372A1 EP18729646.2A EP18729646A EP3642372A1 EP 3642372 A1 EP3642372 A1 EP 3642372A1 EP 18729646 A EP18729646 A EP 18729646A EP 3642372 A1 EP3642372 A1 EP 3642372A1
Authority
EP
European Patent Office
Prior art keywords
metal strip
annealing furnace
temperature distribution
material property
computer
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
EP18729646.2A
Other languages
German (de)
French (fr)
Other versions
EP3642372B1 (en
Inventor
Thomas Daube
Markus Jaenecke
Lutz Kümmel
Ulrich Sommers
Alexandre LHOEST
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 Group GmbH
Original Assignee
SMS Group GmbH
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 Group GmbH filed Critical SMS Group GmbH
Publication of EP3642372A1 publication Critical patent/EP3642372A1/en
Application granted granted Critical
Publication of EP3642372B1 publication Critical patent/EP3642372B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • 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
    • 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
    • C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
    • 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
    • C21D9/562—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/0014—Devices for monitoring temperature
    • 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
    • B21B2037/002—Mass flow control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/20—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0003—Monitoring the temperature or a characteristic of the charge and using it as a controlling value
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0028—Regulation
    • F27D2019/0059—Regulation involving the control of the conveyor movement, e.g. speed or sequences

Definitions

  • the invention relates to a method for operating an annealing furnace for annealing a metal strip.
  • EP 2 742 158 B1 discloses a method for operating a continuous annealing line for processing a metal strip.
  • a model predictive control is proposed in which at least one property of the metal strip is input to a computerized model, and wherein the input relates to a point or portion of the metal strip before or in the conti anneal.
  • at least one material property of the rolling stock is simulated according to the Conti-Glüh process. This simulated material property is compared to a predetermined setpoint.
  • at least one process variable for example the temperature or the speed of the metal strip, is regulated by a regulating device during the conti-annealing process.
  • the regulation of the material properties of a metal strip to a desired desired material property requires a lot of computer power and computing time.
  • the regulation is effected by an interactive modification of process parameters, temperature and / or speed such that the desired material properties for the metal strip result therefrom.
  • the increased computing time is disadvantageous because it results in a reduction of the possible calculation cases or iteration steps.
  • the invention has for its object to develop a known method for operating a Glühofen for annealing a metal strip in terms of improving product quality and increasing the output.
  • the calculation and specification of a target temperature distribution and / or a target speed of the metal strip in the annealing furnace is carried out so that the metal strip after leaving the annealing furnace having desired desired material property.
  • the presence of this desired desired material property is not monitored in the context of the claimed in claim 1 method - unlike a control -;
  • no comparison of the desired desired material property with a measured actual material property of the metal strip takes place behind the exit of the annealing to form a material property control difference and no control of this control difference to zero takes place.
  • the term "temperature distribution” refers in each case to a section of the metal strip, but in the context of the present description, the term “temperature distribution” also implies a singular temperature value at a specific point of the metal strip.
  • annealing furnace includes not only heating devices but also cooling devices downstream of the heating devices in the direction of flow Furthermore, within the scope of the claimed control, there is no feedback of a process variable, which overall increases the output.
  • the claimed method may perform a desired self-correction or self-adaptation.
  • the actual material property of the metal strip is measured after passing through the annealing furnace, and there is a comparison temperature distribution and / or a comparison speed of the metal strip in the annealing furnace by means of the computer-aided model of the annealing furnace as a function of the measured actual material property and information provided about the metal strip before or in the annealing furnace.
  • the method of claim 1 for setting a temperature distribution and / or the speed of the metal strip in the To carry out annealing furnace with the only difference that the actual measured material property of the metal strip is fed after passing through the annealing furnace as an input to the computer model instead of the desired material property.
  • the output variables of the computer-aided model are called comparison variables in this case, in this case specifically the comparison temperature distribution and / or the comparison speed.
  • the actual temperature distribution and / or the actual speed of the metal strip in the annealing furnace are recorded as actual quantities and compared with the previously calculated comparison variables.
  • a non-zero deviation for the temperature distribution and / or the velocity of the metal strip in the annealing furnace may result.
  • an adaptation value calculation unit at least one suitable adaptation value is subsequently calculated on the basis of the said deviations.
  • the computer model is then subsequently adapted using the calculated adaptation value.
  • the above-described method according to the invention for operating an annealing furnace is then carried out for future metal strips, preferably with the adapted computer-aided model. This then results in optimized target temperature distributions and / or desired speeds for the metal strip, which are adjusted by means of a furnace control as an actuator in the annealing furnace.
  • the computer model can be z. B. with an empirical database or with a statistical model or with stored glow curves and is therefore suitable for any type of steel. Especially with newly developed steel grades, this model can be used immediately. In contrast to a physical model, which must first be implemented for each new type of steel, the statistical model used according to the invention is easier to generate.
  • the adaptation of the computer-aided model does not take place during the passage of the metal strip through the annealing furnace, based on its measured or simulated actual material property, the calculation of the at least one adaptation value or the adaptation of the computer-aided model was carried out. Instead, the adaptation preferably takes place only for future glowing metal bands.
  • material properties of the metal strip means, for example, the yield strength, the tensile strength, the elongation at break or the uniform elongation of the metal strip after passing through the annealing furnace.
  • information about the metal strip includes, for example, its tensile strength and / or yield strength before a continuous galvanizing line CGL, before a continuous annealing line CAL, in a pickling line or in front of a reel
  • composition of the material in particular the steel of the metal strip, further in particular its carbon content and / or
  • FIG. 1 shows the method according to the invention
  • FIG. 2 illustrates the adaptation of the computer-aided model according to the invention.
  • FIG. 1 illustrates the method according to the invention for operating an annealing furnace 200.
  • metal strip 100 is annealed as it passes through the annealing furnace in the direction of the arrow.
  • the core element of the method according to the invention is the calculation of a desired temperature distribution Tsoii and / or a desired velocity V SO II for the metal strip in the annealing furnace. This calculation is carried out with the aid of a computer-aided model 220 of the annealing furnace as a function of a predetermined desired desired material property ME SO II of the metal strip and in dependence on information E via the metal strip.
  • the Information relates to properties of the metal strip in front of or in the annealing furnace 200 or they concern information about previous processing steps in the production of the metal strip.
  • properties of the metal strip in front of or in the annealing furnace 200 or they concern information about previous processing steps in the production of the metal strip.
  • the corresponding values are output to an oven controller 230 as an actuator and realized by it in the annealing furnace 200.
  • Said setting of the target temperature distribution and / or the target velocity V SO II of the metal strip in the annealing furnace is carried out with the aim of the actual material property ME
  • the calculation of the setpoint temperature distribution T SO II and / or the setpoint speed Vsoii of the metal strip in the annealing furnace takes place as long as at least one point or a section of the metal strip to which the said target material property ME SO II of the metal strip relates before or in the annealing furnace.
  • the computerized model 220 may be used in calculating the target temperature distribution Tsoii in the annealing furnace 200 and / or calculating the target velocity V SO II at which the metal strip passes through the annealing furnace 200 to an empirical database, a statistical model, and / or fall back on deposited glow curves.
  • the method according to the invention optionally provides an occasional adaptation of the computer-aided model 220, see FIG. 2.
  • the method according to the invention provides the following sub-steps:
  • the comparative temperature distribution T Vg i and comparison speed V Vg i are calculated using the same computer model 220 as the first input quantity taking into account the same information E as the target input temperature distribution and the target speed of the metal strip in the annealing furnace according to FIG.
  • the computer model 220 does not consider the desired material property ME SO II as the second input variable for the calculation of the comparison variables, but the actual material property ME
  • the temperature distribution and / or the speed of the metal strip in the annealing furnace are then adapted to the calculated corresponding comparison variables, ie the comparison temperature distribution T Vg i and / or the comparison speed V Vg i by suitably adapting the computer-aided model 220 said adaptation comprises the following sub-steps; see FIG. 2:
  • St of the metal strip 100 in the annealing furnace 200 is / are metrologically detected; see FIGS. 1 and 2.
  • St , AV V Vg i - V
  • At least one of these deviations is input into an adaptation value calculation device 240, which calculates from these input variables at least one suitable adaptation value a for adapting or adapting the computer-aided model 220.
  • the computer model 220 is then adapted with this adaptation value.
  • This adaptation of the computer model 220 according to the invention is not carried out during the passage of a metal strip through the annealing furnace, but preferably always after passing through a complete metal strip. Therefore, the adaptation of the computer-aided model 220 first affects future metal bands.
  • the adaptation to the comparison size is extremely slow.
  • the adaptation and the data acquisition carried out for this purpose allow a good documentation and thus also a conclusive proof of the production conditions in the past; This is a valuable quality documentation for processors.
  • S t is the material property of the metal strip
  • T is the temperature distribution of the metal strip in the annealing furnace
  • st is the speed of the metal strip in the annealing furnace

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Heat Treatment Processes (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Photovoltaic Devices (AREA)

Abstract

The invention relates to a method for operating an annealing furnace (200) for annealing a metal strip (100). According to the method, at first at least one desired target material property ME Soll is specified for a point or a section of the metal strip (100) after it has passed through the annealing furnace (200). Additionally, information E regarding the metal strip is provided upstream of or in the annealing furnace. A target temperature distribution T Soll and/or a target speed V Soll for the metal strip in the annealing furnace is then calculated with the aid of a computer-assisted model as a function of the target material property and said information. The target temperature distribution and/or target speed thus calculated are/is then set in the annealing furnace (200) in order to change the material property of the metal strip downstream of the annealing furnace into the desired target material property ME Soll.

Description

Verfahren zum Betreiben eines Glühofens  Method for operating a furnace
Die Erfindung betrifft ein Verfahren zum Betreiben eines Glühofens zum Glühen eines Metallbandes. The invention relates to a method for operating an annealing furnace for annealing a metal strip.
Derartige Verfahren sind im Stand der Technik vielfältig bekannt, so z. B. aus der deutschen Offenlegungsschrift DE 10 2013 225 579 A1 . Diese Schrift offenbart ein Verfahren zur Steuerung und / oder Regelung eines Glüh- oder Wärmebehandlungsofens für ein Metallband, wobei der Ofen einem Walzgerüst vorgeschaltet ist. Mindestens ein Messgerät erfasst online eine mechanische Werkstoff-Eigenschaft des Metallbandes und generiert einen entsprechenden Messwert. Dieser Messwert wird in der Regelung für den Glüh- oder Wärmebehandlungsofen zurückgekoppelt. Such methods are widely known in the art, such. B. from German patent application DE 10 2013 225 579 A1. This document discloses a method for controlling and / or regulating an annealing or heat treatment furnace for a metal strip, wherein the furnace is connected upstream of a rolling stand. At least one measuring device records a mechanical material property of the metal strip online and generates a corresponding measured value. This reading is fed back into the scheme for the annealing or annealing furnace.
Die EP 2 742 158 B1 offenbart ein Verfahren zum Betrieb einer Conti-Glühe für die Bearbeitung eines Metallbandes. Es wird eine modellprädiktive Regelung vorgeschlagen, bei welcher als Eingangsgröße mindestens eine Eigenschaft des Metallbandes einem computergestützten Modell zugeführt wird, und wobei die Eingangsgröße sich auf einen Punkt oder einen Abschnitt des Metallbandes vor oder in der Conti-Glühe bezieht. Mit Hilfe des computergestützten Modells wird mindestens eine Materialeigenschaft des Walzgutes nach dem Conti-Glüh- Prozess simuliert. Diese simulierte Materialeigenschaft wird mit einem vorgegebenen Sollwert verglichen. Bei einer Abweichung der simulierten Materialeigenschaft von dem Sollwert wird mindestens eine Prozessgröße, beispielsweise die Temperatur oder die Geschwindigkeit des Metallbandes während des Conti-Glüh-Prozesses durch eine Regeleinrichtung geregelt. Dies erfolgt so lange, bis der mindestens eine Punkt oder der mindestens eine Abschnitt des Walzgutes, auf den sich die Eingangsgröße bezieht, sich noch immer vor oder in der Conti-Glühe befindet. Die in dem EP - Patent EP 2 742 158 B1 beanspruchte Regelung der Materialeigenschaft eines Metallbandes auf eine gewünschte Soll- Materialeigenschaft inklusive einer Simulation von Ist-Materialeigenschaften eines Metallbandes mit Hilfe eines computergestützten Modells erfordert viel Rechnerleistung und Rechenzeit. Die Regelung erfolgt durch eine interaktive Modifikation von Prozessparametern, Temperatur und/oder Geschwindigkeit so, dass sich daraus die gewünschten Materialeigenschaften für das Metallband ergeben. Die erhöhte Rechenzeit ist nachteilig, weil sie in einer Reduktion der möglichen Berechnungsfälle bzw. Iterationsschritte resultiert. EP 2 742 158 B1 discloses a method for operating a continuous annealing line for processing a metal strip. A model predictive control is proposed in which at least one property of the metal strip is input to a computerized model, and wherein the input relates to a point or portion of the metal strip before or in the conti anneal. With the aid of the computer-aided model, at least one material property of the rolling stock is simulated according to the Conti-Glüh process. This simulated material property is compared to a predetermined setpoint. In the case of a deviation of the simulated material property from the desired value, at least one process variable, for example the temperature or the speed of the metal strip, is regulated by a regulating device during the conti-annealing process. This takes place until the at least one point or the at least one section of the rolling stock to which the input quantity relates is still in front of or in the conti-annealing zone. The regulation of the material properties of a metal strip to a desired desired material property, including a simulation of actual material properties of a metal strip with the aid of a computer-aided model, requires a lot of computer power and computing time. The regulation is effected by an interactive modification of process parameters, temperature and / or speed such that the desired material properties for the metal strip result therefrom. The increased computing time is disadvantageous because it results in a reduction of the possible calculation cases or iteration steps.
Der Erfindung liegt die Aufgabe zugrunde, ein bekanntes Verfahren zum Betreiben eines Glühofens zum Glühen eines Metallbandes im Hinblick auf eine Verbesserung der Produktqualität und eine Erhöhung der Ausbringung weiterzubilden. The invention has for its object to develop a known method for operating a Glühofen for annealing a metal strip in terms of improving product quality and increasing the output.
Diese Aufgabe wird durch das im Patentanspruch 1 beanspruchte Verfahren gelöst. This object is achieved by the method claimed in claim 1.
Das gemäß Anspruch 1 beanspruchte Verfahren stellt eine Steuerung, aber keine Regelung dar. Im Rahmen dieser Steuerung erfolgt die Berechnung und Vorgabe einer Soll-Temperaturverteilung und / oder einer Soll-Geschwindigkeit des Metallbandes in dem Glühofen so, dass das Metallband nach Verlassen des Glühofens eine gewünschte Soll-Materialeigenschaft aufweist. Das Vorliegen dieser gewünschten Soll-Materialeigenschaft wird im Rahmen des in Anspruch 1 beanspruchten Verfahrens - anders als bei einer Regelung - nicht überwacht; insbesondere erfolgt kein Vergleich der gewünschten Soll-Materialeigenschaft mit einer gemessenen Ist-Materialeigenschaft des Metallbandes hinter dem Ausgang der Glühe zwecks Bildung einer Materialeigenschaft-Regeldifferenz und es erfolgt keine Regelung dieser Regeldifferenz auf Null. Der Begriff „Temperaturverteilung" bezieht sich streng genommen jeweils auf einen Abschnitt des Metallbandes. Im Sinne der vorliegenden Beschreibung impliziert der Begriff „Temperaturverteilung" jedoch auch einen singulären Temperaturwert an einer bestimmten Stelle des Metallbandes. In the context of this control, the calculation and specification of a target temperature distribution and / or a target speed of the metal strip in the annealing furnace is carried out so that the metal strip after leaving the annealing furnace having desired desired material property. The presence of this desired desired material property is not monitored in the context of the claimed in claim 1 method - unlike a control -; In particular, no comparison of the desired desired material property with a measured actual material property of the metal strip takes place behind the exit of the annealing to form a material property control difference and no control of this control difference to zero takes place. Strictly speaking, the term "temperature distribution" refers in each case to a section of the metal strip, but in the context of the present description, the term "temperature distribution" also implies a singular temperature value at a specific point of the metal strip.
Der Begriff „Glühofen" im Sinne der vorliegenden Beschreibung schließt neben Heizeinrichtungen auch die Heizeinrichtungen in Durchlaufrichtung nachgelagerte Kühleinrichtungen mit ein. Die Berechnung und Vorgabe einer Soll-Temperaturverteilung und / oder einer Soll-Geschwindigkeit des Metallbandes in dem Glühofen ist weniger rechenzeitintensiv als die Simulation von Materialeigenschaften. Außerdem erfolgt im Rahmen der beanspruchten Steuerung keine Rückkopplung einer Prozessgröße. Insgesamt ist damit eine Erhöhung der Ausbringung möglich. For the purposes of the present description, the term "annealing furnace" includes not only heating devices but also cooling devices downstream of the heating devices in the direction of flow Furthermore, within the scope of the claimed control, there is no feedback of a process variable, which overall increases the output.
Gemäß einem bevorzugten Ausführungsbeispiel kann das beanspruchte Verfahren eine gewünschte Selbst-Korrektur bzw. Selbst-Adaption ausführen. Zu diesem Zweck wird die Ist-Materialeigenschaft des Metallbandes nach Durchlauf durch den Glühofen gemessen, und es werden eine Vergleichs- Temperaturverteilung und / oder eine Vergleichs-Geschwindigkeit des Metallbandes in dem Glühofen mit Hilfe des computergestützten Modells des Glühofens in Abhängigkeit der gemessenen Ist-Materialeigenschaft und bereitgestellter Informationen über das Metallband vor oder in dem Glühofen berechnet. Es erfolgt dann eine Anpassung der Temperaturverteilung und / oder der Geschwindigkeit des Metallbandes in dem Glühofen an die zuvor ermittelte Vergleichs-Temperaturverteilung und / oder die Vergleichsgeschwindigkeit durch geeignetes Adaptieren des computergestützten Modells. According to a preferred embodiment, the claimed method may perform a desired self-correction or self-adaptation. For this purpose, the actual material property of the metal strip is measured after passing through the annealing furnace, and there is a comparison temperature distribution and / or a comparison speed of the metal strip in the annealing furnace by means of the computer-aided model of the annealing furnace as a function of the measured actual material property and information provided about the metal strip before or in the annealing furnace. There then takes place an adaptation of the temperature distribution and / or the speed of the metal strip in the annealing furnace to the previously determined comparison temperature distribution and / or the comparison speed by suitably adapting the computer-aided model.
Anders ausgedrückt: Im Rahmen der Selbst-Korrektur bzw. Selbst-Adaption ist vorgesehen, das Verfahren nach Anspruch 1 zur Vorgabe einer Temperaturverteilung und / oder der Geschwindigkeit des Metallbandes in dem Glühofen durchzuführen mit dem einzigen Unterschied, dass dem Computermodell anstelle der Soll-Materialeigenschaft die tatsächlich gemessene Materialeigenschaft des Metallbandes nach Durchlauf durch den Glühofen als Eingangsgröße zugeführt wird. Zur besseren begrifflichen Unterscheidung werden in diesem Fall die Ausgangsgrößen des computergestützten Modells Vergleichsgrößen genannt, hier konkret die Vergleichs-Temperaturverteilung und / oder die Vergleichs-Geschwindigkeit. Die tatsächliche Temperaturverteilung und / oder die tatsächliche Geschwindigkeit des Metallbandes im Glühofen werden als Ist-Größen erfasst und mit den zuvor berechneten Vergleichsgrößen verglichen. Aus diesem Vergleich kann eine Abweichung ungleich Null für die Temperaturverteilung und / oder für die Geschwindigkeit des Metallbandes in dem Glühofen resultieren. In einer Adaptionswert-Berechnungseinheit wird dann nachfolgend mindestens ein geeigneter Adaptionswert auf Basis der besagten Abweichungen berechnet. Das computergestützte Modell wird dann nachfolgend mit Hilfe des berechneten Adaptionswertes adaptiert. Das oben beschriebene erfindungsgemäße Verfahren zum Betreiben eines Glühofens wird dann für zukünftige Metallbänder vorzugsweise mit dem adaptierten computergestützten Modell durchgeführt. Daraus resultieren dann optimierte Soll- Temperaturverteilungen und / oder Soll-Geschwindigkeiten für das Metallband, die mit Hilfe einer Ofensteuerung als Stellglied in dem Glühofen eingestellt werden. In other words, in the context of self-correction or self-adaptation is provided, the method of claim 1 for setting a temperature distribution and / or the speed of the metal strip in the To carry out annealing furnace with the only difference that the actual measured material property of the metal strip is fed after passing through the annealing furnace as an input to the computer model instead of the desired material property. For better conceptual distinction, the output variables of the computer-aided model are called comparison variables in this case, in this case specifically the comparison temperature distribution and / or the comparison speed. The actual temperature distribution and / or the actual speed of the metal strip in the annealing furnace are recorded as actual quantities and compared with the previously calculated comparison variables. From this comparison, a non-zero deviation for the temperature distribution and / or the velocity of the metal strip in the annealing furnace may result. In an adaptation value calculation unit, at least one suitable adaptation value is subsequently calculated on the basis of the said deviations. The computer model is then subsequently adapted using the calculated adaptation value. The above-described method according to the invention for operating an annealing furnace is then carried out for future metal strips, preferably with the adapted computer-aided model. This then results in optimized target temperature distributions and / or desired speeds for the metal strip, which are adjusted by means of a furnace control as an actuator in the annealing furnace.
Das computergestützte Modell kann z. B. mit einer Erfahrungsdatenbank oder mit einem statistischen Modell oder mit hinterlegten Glühkurven arbeiten und ist daher für jede Stahlsorte einsetzbar. Gerade bei neuentwickelten Stahlsorten kann dieses Modell sofort eingesetzt werden. Im Unterschied zu einem physikalischen Modell, welches für jede neue Stahlsorte erst implementiert werden muss, ist das erfindungsgemäß verwendete statistische Modell einfacher zu generieren. The computer model can be z. B. with an empirical database or with a statistical model or with stored glow curves and is therefore suitable for any type of steel. Especially with newly developed steel grades, this model can be used immediately. In contrast to a physical model, which must first be implemented for each new type of steel, the statistical model used according to the invention is easier to generate.
Gemäß einem weiteren bevorzugten Ausführungsbeispiel erfolgt das Adaptieren des computergestützten Modells nicht während des Durchlaufens desjenigen Metallbandes durch den Glühofen, auf Basis von dessen gemessener oder simulierter Ist-Materialeigenschaft die Berechnung des mindestens einen Adaptionswertes bzw. die Adaption des computergestützten Modells erfolgt war. Stattdessen erfolgt die Adaption vorzugsweise erst für zukünftig zu glühende Metallbänder. According to a further preferred embodiment, the adaptation of the computer-aided model does not take place during the passage of the metal strip through the annealing furnace, based on its measured or simulated actual material property, the calculation of the at least one adaptation value or the adaptation of the computer-aided model was carried out. Instead, the adaptation preferably takes place only for future glowing metal bands.
Der Begriff„Materialeigenschaft des Metallbandes", egal ob Soll- oder Ist-Größe, meint im Rahmen der vorliegenden Beschreibung beispielsweise die Streckgrenze, die Zugfestigkeit, die Bruchdehnung oder die Gleichmaßdehnung des Metallbandes nach dessen Durchlauf durch den Glühofen. The term "material properties of the metal strip", whether nominal or actual size, in the context of the present description means, for example, the yield strength, the tensile strength, the elongation at break or the uniform elongation of the metal strip after passing through the annealing furnace.
Der Begriff „Informationen über das Metallband" umfasst beispielsweise dessen Zugfestigkeit und / oder Streckgrenze vor einer Continuous Galvanising Line CGL, vor einer Continuous Annealing Line CAL, in einer Beizlinie oder vor einem Haspel. Die Information kann auch The term "information about the metal strip" includes, for example, its tensile strength and / or yield strength before a continuous galvanizing line CGL, before a continuous annealing line CAL, in a pickling line or in front of a reel
- die Haspeltemperatur, the reel temperature,
- die Endwalztemperatur des Metallbandes beim Auslauf aus einer Fertigstraße,  the final rolling temperature of the metal strip at the outlet from a finishing train,
- die Eingangstemperatur der Bramme, aus dem das Metallband hervorgeht, am Eingang einer Fertigwalzstraße,  the inlet temperature of the slab from which the metal strip emerges, at the entrance of a finishing train,
- die Bandgeschwindigkeit des Metallbandes beim Auslauf aus dem letzten Gerüst - der Fertigwalzstraße,  the strip speed of the metal strip at the outlet from the last stand, the finishing train,
- die Walzkraft in einem Dressiergerüst,  the rolling force in a skin pass mill,
- die Walzkräfte beim Kaltwalzen,  - the rolling forces during cold rolling,
- die Walzkräfte beim Warmwalzen,  - the rolling forces during hot rolling,
- die Eingangstemperatur der Bramme in einem Vorgerüst vor der Fertigwalzstraße,  the inlet temperature of the slab in a roughing stand in front of the finishing train,
- den Kaltwalzgrad,  - the degree of cold rolling,
- die Zusammensetzung des Werkstoffs, insbesondere des Stahls des Metallbandes, weiter insbesondere dessen Kohlenstoffanteil und / oder - The composition of the material, in particular the steel of the metal strip, further in particular its carbon content and / or
- die Richtkraft am Flattener vor der CGL / CAL meinen. - the straightening force on the Flattener before the CGL / CAL mean.
Diese Aufzählung erhebt keinen Anspruch auf Vollständigkeit; vielmehr können auch andere bzw. weitere Informationen dem erfindungsgemäßen computergestützten Modell als Eingangsgrößen zugeführt werden. This list is not exhaustive; Rather, other or further information can be supplied to the computer-aided model according to the invention as input variables.
Weitere vorteilhafte Ausgestaltungen des erfindungsgemäßen Verfahrens sind Gegenstand der abhängigen Ansprüche. Further advantageous embodiments of the method according to the invention are the subject of the dependent claims.
Der Beschreibung sind zwei Figuren beigefügt, wobei Figur 1 das erfindungsgemäße Verfahren; und Figur 2 die erfindungsgemäße Adaption des computergestützten Modells veranschaulicht. The description is accompanied by two figures, wherein FIG. 1 shows the method according to the invention; and FIG. 2 illustrates the adaptation of the computer-aided model according to the invention.
Die Erfindung wird nachfolgend unter Bezugnahme auf die genannten Figuren in Form von Ausführungsbeispielen detailliert beschrieben. In allen Figuren sind gleiche technische Elemente mit gleichen Bezugszeichen bezeichnet. The invention will be described in detail below with reference to the said figures in the form of embodiments. In all figures, the same technical elements are designated by the same reference numerals.
Figur 1 veranschaulicht das erfindungsgemäße Verfahren zum Betreiben eines Glühofens 200. In dem Glühofen 200 wird Metallband 100 geglüht, während es durch den Glühofen in Pfeilrichtung hindurchläuft. Kernelement des erfindungsgemäßen Verfahrens ist die Berechnung einer Soll- Temperaturverteilung Tsoii und / oder einer Soll-Geschwindigkeit VSOII für das Metallband in dem Glühofen. Diese Berechnung erfolgt mit Hilfe eines computergestützten Modells 220 des Glühofens in Abhängigkeit einer vorgegebenen gewünschten Soll-Materialeigenschaft MESOII des Metallbandes sowie in Abhängigkeit von Informationen E über das Metallband. Die Informationen betreffen Eigenschaften des Metallbandes vor oder in dem Glühofen 200 oder sie betreffen Informationen über vorangegangene Bearbeitungsschritte bei der Herstellung des Metallbandes. Bezüglich einer weitergehenden Bedeutung der Begriffe „Materialeigenschaft" und „Information" sei an dieser Stelle auf die oben im allgemeinen Teil der Beschreibung gegebenen Definitionen dieser Begriffe verwiesen. FIG. 1 illustrates the method according to the invention for operating an annealing furnace 200. In the annealing furnace 200, metal strip 100 is annealed as it passes through the annealing furnace in the direction of the arrow. The core element of the method according to the invention is the calculation of a desired temperature distribution Tsoii and / or a desired velocity V SO II for the metal strip in the annealing furnace. This calculation is carried out with the aid of a computer-aided model 220 of the annealing furnace as a function of a predetermined desired desired material property ME SO II of the metal strip and in dependence on information E via the metal strip. The Information relates to properties of the metal strip in front of or in the annealing furnace 200 or they concern information about previous processing steps in the production of the metal strip. With regard to a broader meaning of the terms "material property" and "information", reference is made at this point to the definitions of these terms given above in the general part of the description.
Nach erfolgter Berechnung der Soll-Temperaturverteilung TSOII und / oder der Soll- Geschwindigkeit Vsoii durch das computergestützte Modell 220 werden die entsprechenden Werte an eine Ofensteuerung 230 als Stellglied ausgegeben und von dieser in dem Glühofen 200 realisiert bzw. eingestellt. Das besagte Einstellen der Soll-Temperaturverteilung und / oder der Soll-Geschwindigkeit VSOII des Metallbandes in dem Glühofen erfolgt mit dem Ziel, die Ist-Materialeigenschaft ME|St des Metallbandes hinter dem Glühofen in die vorgegebene gewünschte Soll- Materialeigenschaft MESOII, ebenfalls hinter dem Glühofen, zu überführen. After calculation of the target temperature distribution T SO II and / or the target speed Vsoii by the computer-aided model 220, the corresponding values are output to an oven controller 230 as an actuator and realized by it in the annealing furnace 200. Said setting of the target temperature distribution and / or the target velocity V SO II of the metal strip in the annealing furnace is carried out with the aim of the actual material property ME | St of the metal strip behind the annealing furnace in the predetermined desired material property desired SO SO II, also behind the annealing furnace, to convict.
Das Berechnen der Soll-Temperaturverteilung TSOII und / oder der Soll- Geschwindigkeit Vsoii des Metallbandes in dem Glühofen erfolgt, solange sich noch mindestens ein Punkt oder ein Abschnitt des Metallbandes auf den sich die besagte Soll-Materialeigenschaft MESOII des Metallbandes bezieht, vor oder in dem Glühofen befindet. The calculation of the setpoint temperature distribution T SO II and / or the setpoint speed Vsoii of the metal strip in the annealing furnace takes place as long as at least one point or a section of the metal strip to which the said target material property ME SO II of the metal strip relates before or in the annealing furnace.
Das computergestützte Modell 220 kann bei der Berechnung der Soll- Temperaturverteilung Tsoii in dem Glühofen 200 und / oder bei der Berechnung der Soll-Geschwindigkeit VSOII, mit welcher das Metallband den Glühofen 200 durchläuft, auf eine Erfahrungsdatenbank, ein statistisches Modell und / oder auf hinterlegte Glühkurven zurückgreifen. The computerized model 220 may be used in calculating the target temperature distribution Tsoii in the annealing furnace 200 and / or calculating the target velocity V SO II at which the metal strip passes through the annealing furnace 200 to an empirical database, a statistical model, and / or fall back on deposited glow curves.
Um die Qualität des erfindungsgemäßen Verfahrens zum Betreiben des Glühofens 200 stetig zu verbessern, sieht das erfindungsgemäße Verfahren optional eine gelegentliche Adaption des computergestützten Modells 220 vor, siehe Figur 2. Für diese Adaption sieht das erfindungsgemäße Verfahren folgende Teilschritte vor: In order to steadily improve the quality of the method according to the invention for operating the annealing furnace 200, the method according to the invention optionally provides an occasional adaptation of the computer-aided model 220, see FIG. 2. For this adaptation, the method according to the invention provides the following sub-steps:
- Messen der Ist-Materialeigenschaft ME|St des Metallbandes 1 00 nach Durchlauf durch den Glühofen 200, siehe Figur 1 . Die Messung erfolgt vorzugsweise an dem Punkt oder Abschnitt des Metallbandes, für den die gewünschte Soll-Materialeigenschaft vorgegeben wurde. - Measuring the actual material property ME | St of the metal strip 1 00 after passing through the annealing furnace 200, see Figure 1. The measurement is preferably carried out at the point or section of the metal strip for which the desired desired material property has been specified.
- Berechnen einer Vergleichstemperaturverteilung TVgi und / oder einer Vergleichsgeschwindigkeit VVgi des Metallbandes 1 00 in dem Glühofen mit- Computing a comparison temperature distribution T Vg i and / or a comparison speed V Vg i of the metal strip 1 00 in the annealing furnace with
Hilfe des computergestützten Modells 220 in Abhängigkeit der gemessenen Ist-Materialeigenschaft ME|St des Metallbandes 1 00 und in Abhängigkeit der bereitgestellten Informationen E über das Metallband vor oder in dem Glühofen 200. Assistance of the computer-aided model 220 as a function of the measured actual material property ME | St of the metal strip 1 00 and depending on the information provided E on the metal strip before or in the annealing furnace 200th
Die Vergleichstemperaturverteilung TVgi und Vergleichsgeschwindigkeit VVgi werden zwar mit demselben Computermodell 220 unter Berücksichtigung derselben Informationen E über das Metallband als erster Eingangsgröße berechnet wie die Soll-Temperaturverteilung und die Soll-Geschwindigkeit des Metallbandes in dem Glühofen gemäß Figur 1 . Allerdings berücksichtigt das Computermodell 220 für die Berechnung der Vergleichsgrößen als zweite Eingangsgröße nicht die gewünschte Soll-Materialeigenschaft MESOII, sondern die tatsächlich hinter dem Glühofen gemessene Ist-Materialeigenschaft ME|St des Metallbandes. Die Temperaturverteilung und / oder die Geschwindigkeit des Metallbandes in dem Glühofen werden dann an die berechneten entsprechenden Vergleichsgrößen, d. h. die Vergleichstemperaturverteilung TVgi und / oder die Vergleichs-Geschwindigkeit VVgi angepasst durch ein entsprechend geeignetes Adaptieren des computergestützten Modells 220. Konkret umfasst die besagte Anpassung folgende Teilschritte; siehe Figur 2: Die Ist-Temperaturverteilung T|St und / oder Ist-Geschwindigkeit V|St des Metallbandes 100 in dem Glühofen 200 wird/werden messtechnisch erfasst; siehe Figuren 1 und 2. Diese Messgrößen werden in einer Vergleichseinrichtung 250 mit den zuvor berechneten zugehörigen Vergleichsgrößen verglichen; d. h. es werden gegebenenfalls eine Temperaturabweichung ΔΤ und / oder eine Geschwindigkeits-abweichung AV ermittelt: ΔΤ = TVgi - T|St, AV = VVgi - V|St. Although the comparative temperature distribution T Vg i and comparison speed V Vg i are calculated using the same computer model 220 as the first input quantity taking into account the same information E as the target input temperature distribution and the target speed of the metal strip in the annealing furnace according to FIG. However, the computer model 220 does not consider the desired material property ME SO II as the second input variable for the calculation of the comparison variables, but the actual material property ME | actually measured behind the annealing furnace St of the metal band. The temperature distribution and / or the speed of the metal strip in the annealing furnace are then adapted to the calculated corresponding comparison variables, ie the comparison temperature distribution T Vg i and / or the comparison speed V Vg i by suitably adapting the computer-aided model 220 said adaptation comprises the following sub-steps; see FIG. 2: The actual temperature distribution T | St and / or actual speed V | St of the metal strip 100 in the annealing furnace 200 is / are metrologically detected; see FIGS. 1 and 2. These measured variables are compared in a comparison device 250 with the previously calculated associated comparison variables; ie, if necessary, a temperature deviation ΔΤ and / or a speed deviation AV are determined: ΔΤ = T Vg i -T | St , AV = V Vg i - V | St.
Zumindest eine dieser Abweichung findet Eingang in eine Adaptionswert- Berechnungseinrichtung 240, welche aus diesen Eingangsgrößen mindestens einen geeigneten Adaptionswert a zur Anpassung bzw. Adaption des computergestützten Modells 220 berechnet. Das computergestützte Modell 220 wird dann mit diesem Adaptionswert adaptiert. Diese Adaption des Computermodells 220 erfolgt erfindungsgemäß nicht während des Durchlaufens eines Metallbandes durch den Glühofen, sondern vorzugsweise immer erst nach dem Durchlaufen eines kompletten Metallbandes. Deshalb wirkt sich die Adaption des computergestützten Modells 220 erst auf zukünftige Metallbänder aus. Die Anpassung an die Vergleichsgröße erfolgt insofern extrem langsam. Vorteilhafterweise ermöglicht die Adaption und die dafür durchgeführte Messwerterfassung eine gute Dokumentation und damit auch einen schlüssigen Nachweis über die Produktionsbedingungen in der Vergangenheit; dies ist eine wertvolle Qualitätsdokumentation für Weiterverarbeiter. At least one of these deviations is input into an adaptation value calculation device 240, which calculates from these input variables at least one suitable adaptation value a for adapting or adapting the computer-aided model 220. The computer model 220 is then adapted with this adaptation value. This adaptation of the computer model 220 according to the invention is not carried out during the passage of a metal strip through the annealing furnace, but preferably always after passing through a complete metal strip. Therefore, the adaptation of the computer-aided model 220 first affects future metal bands. The adaptation to the comparison size is extremely slow. Advantageously, the adaptation and the data acquisition carried out for this purpose allow a good documentation and thus also a conclusive proof of the production conditions in the past; This is a valuable quality documentation for processors.
Nach erfolgter Adaption des Computermodells 220 erfolgen zukünftige Berechnungen der Soll-Temperaturverteilung TSOII und / oder der Soll- Geschwindigkeit VSOII des Metallbandes mit Hilfe des adaptierten computergestützten Modells. Der Glühofen 200 wird dann mit den neu berechneten Soll-Werten für die Temperaturverteilung oder die Geschwindigkeitsverteilung betrieben. Bezugszeichenliste After the adaptation of the computer model 220, future calculations of the target temperature distribution T SO II and / or the target velocity V SO II of the metal strip are carried out with the aid of the adapted computer-aided model. The annealing furnace 200 is then operated with the newly calculated target values for the temperature distribution or the velocity distribution. LIST OF REFERENCE NUMBERS
100 Metallband 100 metal band
200 Glühofen  200 annealing furnace
220 computergestütztes Modell  220 computer-aided model
230 Ofensteuerung als Stellglied  230 furnace control as actuator
240 Adaptionswertberechnungseinrichtung  240 adaptation value calculation device
E Information über das Metallband E Information about the metal band
ME|St Ist-Materialeigenschaft des Metallbandes ME | S t is the material property of the metal strip
MEsoii Soll-Materialeigenschaft des Metallbandes  MEsoii target material property of metal strip
T|st Ist-Temperaturverteilung des Metallbandes in dem Glühofen T | st is the temperature distribution of the metal strip in the annealing furnace
Tsoll Soll-Temperaturverteilung des Metallbandes in dem GlühofenTsoll target temperature distribution of the metal strip in the annealing furnace
Tvgl Vergleichstemperaturverteilung für das Metallband Comparison temperature distribution for the metal strip
V|st Ist-Geschwindigkeit des Metallbandes in dem Glühofen V | st is the speed of the metal strip in the annealing furnace
Vsoll Soll-Geschwindigkeit des Metallbandes in dem GlühofenVset nominal velocity of the metal strip in the annealing furnace
Vvgl Vergleichsgeschwindigkeit für das Metallband in dem Glühofen Comparison speed for the metal strip in the annealing furnace
ΔΤ Temperaturabweichung ΔΤ temperature deviation
AV Geschwindigkeitsabweichung  AV speed deviation

Claims

Patentansprüche: claims:
1 . Verfahren zum Betreiben eines Glühofens (200) zum Glühen eines 1 . A method of operating an annealing furnace (200) for annealing a
Metallbandes, aufweisend folgende Schritte:  Metal band, comprising the following steps:
- Vorgeben mindestens einer gewünschten Soll-Materialeigenschaft  - Specify at least one desired material property
(MEsoii), die ein Punkt oder Abschnitt des Metallbandes (100) aufweisen soll nach Durchlaufen des Glühofens (200);  (MEsoii) which is to have a point or portion of the metal strip (100) after passing through the annealing furnace (200);
- Bereitstellen von mindestens einer Information (E) über das Metallband vor oder in dem Glühofen (200);  - providing at least one piece of information (E) about the metal strip in front of or in the annealing furnace (200);
- Berechnen einer Soll- Temperaturverteilung (TSOII) und/oder einer Soll- Geschwindigkeit (Vsoii) des Metallbandes (100) in dem Glühofen (200) mit Hilfe eines computergestützten Modells (220) in Abhängigkeit der gewünschten Soll-Materialeigenschaft (MESOII) und der Information (E) über das Metallband; und - Calculating a target temperature distribution (T SO II) and / or a target speed (Vsoii) of the metal strip (100) in the annealing furnace (200) by means of a computer-aided model (220) depending on the desired material property desired (ME SO II) and the information (E) on the metal strip; and
- Einstellen der Soll-Temperaturverteilung (TSOII) und/oder der Soll- Geschwindigkeit (Vsoii) des Metallbandes (100) in dem Glühofen (200) mit Hilfe einer Ofensteuerung (230) als Stellglied. - Setting the target temperature distribution (T SO II) and / or the target speed (Vsoii) of the metal strip (100) in the annealing furnace (200) by means of a furnace control (230) as an actuator.
2. Verfahren nach Anspruch 1 , 2. The method according to claim 1,
dadurch gekennzeichnet,  characterized,
dass das Berechnen der Soll-Temperaturverteilung und / oder der  calculating the desired temperature distribution and / or the
Sollgeschwindigkeit des Metallbandes erfolgt, solange sich der mindestens eine Punkt oder Abschnitt des Metallbandes, auf den sich die gewünschte Soll-Materialeigenschaft (MESOII) des Metallbandes bezieht, noch vor oder in dem Glühofen (200) befindet. Target speed of the metal strip takes place as long as the at least one point or section of the metal strip to which the desired material property (ME SO II) of the metal strip relates is still in front of or in the annealing furnace (200).
3. Verfahren nach Anspruch 1 oder 2, 3. The method according to claim 1 or 2,
dadurch gekennzeichnet,  characterized,
dass das computergestützte Modell (220) bei der Berechnung der Soll- Temperaturverteilung (TSOII) und/oder der Soll-Geschwindigkeit (VSOII) auf eine Erfahrungsdatenbank, ein statistisches Modell oder auf hinterlegte Glühkurven zurückgreift. that the computer model (220) is used in the calculation of the target Temperature distribution (T SO II) and / or the target speed (V SO II) on an empirical database, a statistical model or on deposited Glühkurven draws.
4. Verfahren nach einem der vorangegangenen Ansprüche, 4. Method according to one of the preceding claims,
gekennzeichnet durch  marked by
Messen der Ist-Materialeigenschaft (ME|St) des Metallbandes (100) nach Durchlauf durch den Glühofen (200), vorzugsweise an dem Punkt oder Abschnitt des Metallbandes, für den die Soll-Materialeigenschaft vorgegeben wird; Measuring the actual material property (ME | St ) of the metal strip (100) after passing through the annealing furnace (200), preferably at the point or portion of the metal strip for which the desired material property is predetermined;
Berechnen einer Vergleichstemperaturverteilung (TVgi) und/oder einer Vergleichsgeschwindigkeit (VVgi) des Metallbandes (100) in dem Glühofen (200) mit Hilfe des computergestützten Modells (220) in Abhängigkeit der gemessen Ist-Materialeigenschaft (ME|St) nach dem Durchlauf und der bereitgestellten Information (E) über das Metallband vor oder in dem Glühofen (200); und Calculating a comparative temperature distribution (T Vg i) and / or a comparison speed (V Vg i) of the metal strip (100) in the annealing furnace (200) with the aid of the computer-aided model (220) as a function of the measured actual material property (ME | St ) the run and the information provided (E) over the metal strip in front of or in the annealing furnace (200); and
Anpassen der Temperaturverteilung und/oder der Geschwindigkeit des Metallbandes (100) in dem Glühofen (200) an die  Adjusting the temperature distribution and / or the speed of the metal strip (100) in the annealing furnace (200) to the
Vergleichstemperaturverteilung (TVgi) und/oder die Comparative temperature distribution (T Vg i) and / or the
Vergleichsgeschwindigkeit (VVgi) durch geeignetes Adaptieren des computergestützten Modells. Comparison speed (V Vg i) by suitably adapting the computer-aided model.
5. Verfahren nach Anspruch 4, 5. The method according to claim 4,
dadurch gekennzeichnet,  characterized,
dass die Ist-Materialeigenschaft des Metallbandes nach dem Durchlaufen des Metallbandes (100) durch den Glühofen direkt online oder an einer aus dem Metallband entnommenen Probe gemessen wird.  that the actual material property of the metal strip is measured after passing through the metal strip (100) through the annealing furnace directly online or on a sample taken from the metal strip.
6. Verfahren nach Anspruch 4 oder 5, 6. The method according to claim 4 or 5,
dadurch gekennzeichnet,  characterized,
dass das Adaptieren des computergestützten Modells erst nach Durchlaufen von mindestens dem gesamten Metallband, optional auch mehrerer Metallbänder durch den Glühofen (200) erfolgt. that adapting the computer-aided model only after Passing through at least the entire metal strip, optionally also several metal bands through the annealing furnace (200) takes place.
7. Verfahren nach einem der Ansprüche 4 bis 6, 7. The method according to any one of claims 4 to 6,
dadurch gekennzeichnet,  characterized,
dass der Schritt des Adaptierens des computergestützten Modells folgende Teilschritte umfasst:  in that the step of adapting the computer-aided model comprises the following sub-steps:
Messen einer Ist-Temperaturverteilung (T|St) und/oder einer Ist- Geschwindigkeit (V|St) des Metallbandes (100) in dem Glühofen (200); Vergleichen der Ist-Temperaturverteilung (T|St) mit der berechneten Measuring an actual temperature distribution (T | St ) and / or an actual velocity (V | St ) of the metal strip (100) in the annealing furnace (200); Compare the actual temperature distribution (T | St ) with the calculated one
Vergleichstemperaturverteilung (TVgi) und Ermitteln einer Comparison temperature distribution (T Vg i) and determining a
Temperaturabweichung (AT); und/oder  Temperature deviation (AT); and or
Vergleichen der Ist-Geschwindigkeit (V|St) des Metallbandes (100) in dem Glühofen (200) mit der Vergleichsgeschwindigkeit (VVgi) und Ermitteln einer Geschwindigkeitsabweichung (AV); Comparing the actual velocity (V | St ) of the metal strip (100) in the annealing furnace (200) with the comparative velocity (V Vg i) and determining a velocity deviation (AV);
Berechnen mindestens eines geeigneten Adaptionswertes (a) zur  Calculating at least one suitable adaptation value (a) for
Anpassung des computergestützten Modells (220) auf Basis der  Adaptation of the computerized model (220) based on the
Temperatur-abweichung (AT) und/oder der Geschwindigkeitabweichung (AV);  Temperature deviation (AT) and / or speed deviation (AV);
Adaptieren des computergestützten Modells (220) auf Basis des  Adapt the computer model (220) based on the
Adaptionswertes (a); und  Adaptation value (a); and
erneutes Berechnen der Soll-Temperaturverteilung (TSOII) und / oder der Soll-Geschwindigkeit (VSOII) eines neuen Metallbandes (100) mit Hilfe des adaptierten computergestützten Modells (220). recalculating the target temperature distribution (T SO II) and / or the target velocity (V SO II) of a new metal strip (100) using the adapted computerized model (220).
8. Verfahren nach Anspruch 7, 8. The method according to claim 7,
gekennzeichnet durch  marked by
Wiederholen der Schritte nach einem der vorangegangenen Ansprüche mit dem adaptierten computergestützten Modell beim Glühen eines zukünftigen Metallbandes (100). Repeating the steps of any one of the preceding claims with the adapted computer model in annealing a future metal strip (100).
9. Verfahren nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, 9. The method according to any one of the preceding claims, characterized
dass es sich bei der Materialeigenschaft (MESoii; ME|St ) des Metallbandes (100) nach Durchlaufen des Glühofens (200) z.B. um dessen Streckgrenze, dessen Zugfestigkeit, dessen Bruchdehnung und / oder dessen that the material property (ME S oii ; ME | St ) of the metal strip (100) after passing through the annealing furnace (200), for example, its yield strength, tensile strength, elongation at break and / or its
Gleichmaßdehnung handelt.  Even expansion is concerned.
10. Verfahren nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, 10. The method according to any one of the preceding claims, characterized
dass es sich bei den Informationen (E) über das Metallband (100) vor oder in dem Glühofen (200) beispielsweise handelt um: dessen Zugfestigkeit und / oder Streckgrenze vor einer Continuous Galvanising Line CGL vor einer Continuous Annealing Line CAL, in einer Beizlinie oder vor einem Haspel,  that the information (E) about the metal strip (100) before or in the annealing furnace (200) is, for example: its tensile strength and / or yield strength before a continuous galvanizing line CGL before a continuous annealing line CAL, in a pickling line or in front of a reel,
- die Haspeltemperatur,  the reel temperature,
- die Endwalztemperatur des Metallbandes beim Auslauf aus einer Fertigstraße,  the final rolling temperature of the metal strip at the outlet from a finishing train,
- die Eingangstemperatur der Bramme, aus welcher das Metallband hergestellt wird, am Eingang einer Fertigwalzstraße,  the inlet temperature of the slab from which the metal strip is produced, at the entrance of a finishing train,
- die Bandgeschwindigkeit des Metallbandes beim Auslauf aus dem letzten Gerüst der Fertigwalzstraße,  the strip speed of the metal strip at the outlet from the last stand of the finishing train,
- die Walzkraft in einem Dressiergerüst,  the rolling force in a skin pass mill,
- die Walzkräfte beim Kaltwalzen,  - the rolling forces during cold rolling,
- die Walzkräfte beim Warmwalzen,  - the rolling forces during hot rolling,
- die Eingangstemperatur der Bramme in ein Vorgerüst vor der Fertigwalzstraße,  the inlet temperature of the slab in a roughing stand in front of the finishing train,
- den Kaltwalzgrad,  - the degree of cold rolling,
- die Zusammensetzung des Werkstoffs, insbesondere des Stahls des Metallbandes, weiter insbesondere dessen Kohlenstoffanteil; und / oder - The composition of the material, in particular the steel of the metal strip, further in particular its carbon content; and or
- die Richtkraft am Flattener vor der CGL / CAL. - the straightening force on the Flattener before the CGL / CAL.
EP18729646.2A 2017-06-20 2018-06-05 Method for operating an annealing surface Active EP3642372B1 (en)

Applications Claiming Priority (2)

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DE102017210230.6A DE102017210230A1 (en) 2017-06-20 2017-06-20 Method for operating a furnace
PCT/EP2018/064722 WO2018234028A1 (en) 2017-06-20 2018-06-05 Method for operating an annealing surface

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DE102017210230A1 (en) * 2017-06-20 2018-12-20 Sms Group Gmbh Method for operating a furnace

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DE102017210230A1 (en) 2018-12-20
KR20200018610A (en) 2020-02-19
EP3642372B1 (en) 2021-05-26
CN110770357B (en) 2021-10-01
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CN110770357A (en) 2020-02-07
US20200131599A1 (en) 2020-04-30

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