WO2001061073A2 - Method and device for pickling rolled metal, in particular steel strip - Google Patents

Method and device for pickling rolled metal, in particular steel strip Download PDF

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Publication number
WO2001061073A2
WO2001061073A2 PCT/EP2001/001683 EP0101683W WO0161073A2 WO 2001061073 A2 WO2001061073 A2 WO 2001061073A2 EP 0101683 W EP0101683 W EP 0101683W WO 0161073 A2 WO0161073 A2 WO 0161073A2
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WO
WIPO (PCT)
Prior art keywords
pickling
measured values
coil
scale
measured
Prior art date
Application number
PCT/EP2001/001683
Other languages
German (de)
French (fr)
Other versions
WO2001061073A3 (en
Inventor
Rolf BÜNTEN
Rolf Brisberger
Bodo Block
Jürgen Seidel
Original Assignee
Sms Demag Aktiengesellschaft
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
Priority claimed from DE10062869A external-priority patent/DE10062869A1/en
Application filed by Sms Demag Aktiengesellschaft filed Critical Sms Demag Aktiengesellschaft
Priority to JP2001559906A priority Critical patent/JP2003528978A/en
Priority to CA002399754A priority patent/CA2399754A1/en
Priority to KR1020027008889A priority patent/KR20020077879A/en
Priority to AU2001246436A priority patent/AU2001246436A2/en
Priority to SK1185-2002A priority patent/SK11852002A3/en
Priority to EP01919285A priority patent/EP1257687A2/en
Priority to AU4643601A priority patent/AU4643601A/en
Priority to BR0107950-6A priority patent/BR0107950A/en
Publication of WO2001061073A2 publication Critical patent/WO2001061073A2/en
Publication of WO2001061073A3 publication Critical patent/WO2001061073A3/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
    • C23G3/027—Associated apparatus, e.g. for pretreating or after-treating
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08—Iron or steel

Definitions

  • the invention relates to a method and a device for pickling metal, in particular steel strip, which is fed to a controlled pickling process.
  • a method for pickling a metal strip is known from DE 19743 022 A1, which is based on a measurement in the direction of flow behind the pickling system and in which pickling parameters are set according to defect categories that the measuring device detects, such as Temperature of the pickling liquid, throughput speed of the metal strip, the acid content in the pickling liquid, the metal content, in particular the iron content, strip parameters, e.g. Material and geometrical dimensions.
  • the defects can only be determined retrospectively and conclusions can be drawn about a cheaper stain.
  • the controlled system only covers the pickling system itself.
  • EP 0482725 A1 Another known method (EP 0482725 A1) works with turbulent flows which are generated in the pickling tank by nozzles. The aim is to achieve an optimal pickling result with minimal consumption of pickling medium. This result is to be achieved by regulating the turbulence of the flow in the pickling medium as a function of the throughput speed of the strip to be pickled. Further effects are not expected.
  • Another method for pickling a rolled strip in a pickling plant is known from EP 0602437 B1. The process is based on a special mode of operation of several pickling tanks connected in series.
  • An acidic pickling medium is injected into the pickling tank via injection nozzles arranged at least on the side, above and below the belt running level on the pool, the nozzles being variably controlled and the pickling medium being input in any desired quantity.
  • the acid concentration and / or the medium temperature and / or the nozzle outlet speed of the pickling medium can be preselected.
  • the object of the invention is to carry out the pickling process not only on the basis of the usual pickling parameters, but also to take additional parameters outside the pickling tank into account.
  • the object is achieved according to the invention in that the pickling process in addition to the pickling medium parameters is regulated on the basis of parameters of the coil and / or the metal strip that have been determined and / or measured before the metal strip enters the pickling part.
  • the advantage is to set the pickling parameters in advance so that under or over pickling is avoided, the acid concentration and the acid supply are set correctly and the pickling medium is used economically so that the correct temperature can be calculated in advance together with other pickling parameters to be set in advance. After casting, hot forming and after annealing removed scale, pre-descaling and other deposits can already be taken into account.
  • the invention therefore also takes into account the fact that the scale has broken up (via stretch bending straighteners), with cracks and pores in the scale layer which enlarge the surface wetted by acid.
  • the amount of scale to be dissolved in the pickling process can be reduced, so that the pickling time is reduced depending on the type of pre-descaling can be. If the temperature of the metal strip is increased before it runs into the stain, the contact time between the strip surface and the pickling medium is extended at the optimum pickling temperature. The heating distance of the metal strip is shortened and the pickling time is reduced. The pickling time also decreases if the scale is removed by laser optics before entering the pickle and the amount of scale to be removed is reduced.
  • the method is used in such a way that the pickling process is preset with measured values of a coil on the basis of a built-up calculation model and on the basis of a control calculation model that at least measures values for scale; Strip temperature; Pickling medium temperature and / or acid concentration is taken into account, is regulated.
  • the amount of scale needs e.g. no longer being valued, as has been the case so far.
  • the goal of such an optimization can be: minimal energy consumption, more variable coil sequences, accelerated reaction to the type and amount of surface contamination, minimization of pickling consumption and pickling losses, minimization of over-pickling and minimization of under-pickling.
  • measuring devices for detecting the scale its layer thickness, shape, distribution and color can be used. Exact calculation models are used for this.
  • actuators of the pickling are regulated or readjusted. This enables regulation of the pickling section with the shortest possible transmission times.
  • the procedure is such that additional measured values for scale deposits or deposits are recorded in an area in the direction of movement in front of the pickling part and are used for readjusting the actuators of the pickling part and / or for comparing measured or calculated values. Additional parameters outside the pickling section are taken into account in that the pickling times are regulated based on the strip entrance information of the coil and the machine setting.
  • Another method step provides that the recorded measured values via the deposits or the scale are used for regulating a pretreatment unit upstream of the pickling part.
  • the pickling medium can be regulated even more precisely in its parameters due to the pretreatment unit.
  • pretreatment unit and the actuators of the pickling part are readjusted in comparison with the measured or calculated values.
  • the device for pickling rolled metal, in particular steel strip, which can be fed in the treatment direction from a coil of a pickling system, for which a control of several parameters is provided solves the task in that coil measurement or information sensors have a structure - Computational model Measured values can be switched to the control units of the pickling section using a control computing model. This allows the pickling section to be operated more economically and more precisely, which leads to the advantages mentioned.
  • measured values from coil measured value sensors can be entered into the control calculation model.
  • the construction computing model uses general input information for the metal strip. From this, scale orders can already be calculated using calculation approaches to preset or adjust the slow and fast actuators of the pickling section.
  • measured values from a transducer via the linings or the scale can be used to readjust the actuator of the pickling part.
  • the pickling part is preceded by a pretreatment unit, the measured values of which can be input into the control computing model.
  • the pretreatment unit can influence the pickling time if the necessity is recognized and the coil information and the current machine setting are evaluated appropriately.
  • the pretreatment unit can be a preheating unit, a mechanical, an abrasive, a hydromechanical, a laser-optical or a vibration descaler.
  • a further improvement is given by the fact that an induction heater for the strip is switched on between the pretreatment unit and the pickling part.
  • the inductive preheating of the metal strip is switched on before the pickling and is used to quickly regulate the metal strip temperature and to set the metal strip pickling temperature.
  • Fig. 1 is a block diagram of the coil and pickling plant with control in one
  • FIG. 3 shows the block diagram in a second variant with a pretreatment unit
  • Fig. 4 shows the block diagram in a third variant with the transducer and the pretreatment unit and
  • Fig. 5 shows the block diagram in a fourth variant with the sensor, the pretreatment unit and an induction heater.
  • the metal strip 1 runs from a coil 2 into the pickling section 3.
  • coil information 4 is input by an information sensor 4a and an information sensor 4b into a superstructure computing model 6 and / or into a control computing model 8 and processed according to the program. Further measured values 7 can be taken into account in the construction computing model 6.
  • the pickling process is regulated on the basis of parameters of the coil 2 and / or the metal strip 1 that have been determined and / or measured with actuators before the metal strip 1 enters the pickling part 3 within the machine 5.
  • a scale determination 10 On the basis of a first variant according to FIG. 2, in addition to the presetting of the pickling parameters, additionally measured values about the deposits or the scale are processed in a scale determination 10 with a measurement sensor M in the control computing model 8.
  • the pickling process is preset in each case (FIGS. 1 to 5) on the basis of the built-up computing model 6 with measured values of the coil 2 and is regulated on the basis of the regulating computing model 8, which takes into account at least measured values for scale, bath temperature, pickling medium temperature and / or acid concentration.
  • the additionally measured values for scale deposits in front of the pickling part 3 are used to regulate or readjust the actuators in the machine 5.
  • a pretreatment unit H which influences the pickling time.
  • the slow and fast actuators of the pickling part 3 are readjusted in the comparison of measured or calculated values from the control computing model 8, in particular taking into account the changed pickling times.
  • a third variant additional measured values for scale deposits or deposits are recorded in parallel by the measurement sensor M of the scale detector 10 in the direction of movement 9 in front of the pickling part 3 and for the adjustment of the members of the pickling part 3 and / or used in the comparison of measured or calculated values.
  • the pickling times are regulated on the basis of strip input information from coil 2 and the machine setting.
  • the measured values recorded on the deposits or the scale are used to regulate a pretreatment unit H upstream of the pickling part 3.
  • the pre-treatment unit H and the actuators of the pickling part 3 are readjusted in comparison with the measured or calculated values.
  • an induction heater W is switched on between the pickling part 3 and the pretreatment unit H in addition to the scale detection 10 and the pretreatment unit H.
  • the pickling time is defined as the contact time between the surface to be cleaned and the pickling medium, which is necessary to reliably remove the dirt from the metal strip 1.
  • the pretreatment unit H can also accommodate the preheating unit in the form of the induction heater W.
  • the pretreatment unit H basically has a mechanical, abrasive, hydromechanical, laser-optical or vibration-technical descaler.
  • An inductive preheating of the metal strip 1 by the induction heater W is installed in front of the pickling part 3 and serves to quickly regulate the metal strip and the pickling medium temperature.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • ing And Chemical Polishing (AREA)

Abstract

The invention relates to a method and device for pickling rolled metal, in particular steel strip, whereby the metal strip (1) is fed to a controlled pickling method. The aim of the invention is to carry out the pickling method, taking into account not just the usual parameters, but also additional parameters from outside the pickling bath. Said aim is achieved, whereby the pickling method is controlled by parameters of the coil (2) and/or the metal strip, determined and/or measured before the metal strip is fed into the pickling section (3), in addition to the pickling medium parameters.

Description

Verfahren und Einrichtung zum Beizen von gewalztem Metall-, insbesondere von StahlbandMethod and device for pickling rolled metal, in particular steel strip
Die Erfindung betrifft ein Verfahren und eine Einrichtung zum Beizen von Metall- , insbesondere von Stahlband, das einem geregelten Beizvorgang zugeführt wird.The invention relates to a method and a device for pickling metal, in particular steel strip, which is fed to a controlled pickling process.
Aus der DE 19743 022 A1 ist ein Verfahren zum Beizen eines Metallbandes bekannt, das auf einer Messung in Durchlaufrichtung hinter der Beizanlage beruht und bei dem nach Defektkategorien, die das Messgerät erfasst, Beizparameter eingestellt werden, wie z.B. Temperatur der Beizflüssigkeit, Durchlaufgeschwindigkeit des Metallbandes, der Säuregehalt in der Beizflüssigkeit, der Metallgehalt, insbesondere der Eisengehalt, Bandparameter, wie z.B. Material und geometrische Abmessungen. Insofern können die Defekte nur nachträglich festgestellt und Schlüsse auf eine günstigere Beize gezogen werden. Die Regelstrecke erfasst somit nur die Beizanlage selbst.A method for pickling a metal strip is known from DE 19743 022 A1, which is based on a measurement in the direction of flow behind the pickling system and in which pickling parameters are set according to defect categories that the measuring device detects, such as Temperature of the pickling liquid, throughput speed of the metal strip, the acid content in the pickling liquid, the metal content, in particular the iron content, strip parameters, e.g. Material and geometrical dimensions. In this respect, the defects can only be determined retrospectively and conclusions can be drawn about a cheaper stain. The controlled system only covers the pickling system itself.
Ein anderes bekanntes Verfahren ( EP 0482725 A1) arbeitet mit turbulenten Strömungen, die in dem Beizbehälter durch Düsen erzeugt werden. Dadurch wird ein optimales Beizergebnis bei minimalem Verbrauch an Beizmedium angestrebt. Dieses Ergebnis soll dahingehend erzielt werden, dass die Turbulenz der Strömung im Beizmedium in Abhängigkeit der Durchlaufgeschwindigkeit des zu beizenden Bandes geregelt wird. Weitergehende Wirkungen sind nicht zu erwarten. Ein weiteres Verfahren zum Beizen eines Walzbandes in einer Beizanlage ist aus der EP 0602437 B1 bekannt. Das Verfahren beruht auf einer besonderen Betriebsweise mehrerer hintereinander angeschlossener Beizbecken. In den Beizbecken wird über zumindest seitlich, ober- und unterhalb der Bandlaufebene am Becken angeordnete Einspritzdüsen ein säurehaltiges Beizmedium eingespritzt, wobei die Düsen variabel angesteuert werden und das Beizmedium mit beliebig vorwählbarer Menge eingegeben wird. Dabei ist die Säurekonzentration und / oder die Mediumtemperatur und / oder die Düsenaustritts-Geschwϊndigkeit des Beizmediums vorwählbar.Another known method (EP 0482725 A1) works with turbulent flows which are generated in the pickling tank by nozzles. The aim is to achieve an optimal pickling result with minimal consumption of pickling medium. This result is to be achieved by regulating the turbulence of the flow in the pickling medium as a function of the throughput speed of the strip to be pickled. Further effects are not expected. Another method for pickling a rolled strip in a pickling plant is known from EP 0602437 B1. The process is based on a special mode of operation of several pickling tanks connected in series. An acidic pickling medium is injected into the pickling tank via injection nozzles arranged at least on the side, above and below the belt running level on the pool, the nozzles being variably controlled and the pickling medium being input in any desired quantity. The acid concentration and / or the medium temperature and / or the nozzle outlet speed of the pickling medium can be preselected.
Der Erfindung liegt die Aufgabe zugrunde, den Beizvorgang nicht nur aufgrund der üblichen Beizparameter durchzuführen, sondern zusätzliche Parameter außerhalb des Beizbeckens zu berücksichtigen.The object of the invention is to carry out the pickling process not only on the basis of the usual pickling parameters, but also to take additional parameters outside the pickling tank into account.
Die gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, dass der Beizvorgang zusätzlich zu den Beizmediumparametem aufgrund von vor dem Einlaufen des Metallbandes in den Beizteil festgestellten und / oder gemessenen Parametern des Coils und / oder des Metallbandes geregelt wird. Der Vorteil ist, die Beizparameter im voraus so einzustellen, dass Unter- oder Uberbeizungen vermieden werden, dass die Säurekonzentration und die Säurezufuhr richtig eingestellt und dadurch Beizmedium ökonomisch eingesetzt wird, dass die richtige Temperatur im voraus berechnet werden kann zusammen mit anderen voreilend einzustellenden Beizparametern. Dabei können nach dem Gießen, dem Warmumformen und nach Glühungen entfernter Zunder einer Vorentzunderung und andere Beläge schon berücksichtigt werden. Die Erfindung berücksichtigt daher auch, dass der Zunder vorgebrochen ist (über Streckbiegerichter), wobei Risse und Poren in der Zunderschicht entstehen, die die von Säure benetzte Oberfläche vergrößern. Für den Fall, dass der Zunder abrasiv oder hydromechanisch abgetragen wird, kann die im Beizprozess aufzulösende Zundermenge verringert werden, so dass je nach Art der Vorentzunderung die Beizzeit gesenkt werden kann. Im Fall die Temperatur des Metallbandes vor dem Einlaufen in die Beize erhöht wird, verlängert sich die Kontaktzeit von Bandoberfläche und Beizmedium bei optimaler Beiztemperatur. Die Erwärmungsstrecke des Metallbandes wird verkürzt und die Beizzeit sinkt. Die Beizzeit sinkt ebenfalls, wenn der Zunder laseroptisch vor dem Eintritt in die Beize abgetragen und die Menge des zu lösenden Zunders verringert wird.The object is achieved according to the invention in that the pickling process in addition to the pickling medium parameters is regulated on the basis of parameters of the coil and / or the metal strip that have been determined and / or measured before the metal strip enters the pickling part. The advantage is to set the pickling parameters in advance so that under or over pickling is avoided, the acid concentration and the acid supply are set correctly and the pickling medium is used economically so that the correct temperature can be calculated in advance together with other pickling parameters to be set in advance. After casting, hot forming and after annealing removed scale, pre-descaling and other deposits can already be taken into account. The invention therefore also takes into account the fact that the scale has broken up (via stretch bending straighteners), with cracks and pores in the scale layer which enlarge the surface wetted by acid. In the event that the scale is abrasively or hydromechanically removed, the amount of scale to be dissolved in the pickling process can be reduced, so that the pickling time is reduced depending on the type of pre-descaling can be. If the temperature of the metal strip is increased before it runs into the stain, the contact time between the strip surface and the pickling medium is extended at the optimum pickling temperature. The heating distance of the metal strip is shortened and the pickling time is reduced. The pickling time also decreases if the scale is removed by laser optics before entering the pickle and the amount of scale to be removed is reduced.
Das Verfahren wird dabei in der Art und Weise angewendet, dass der Beizvorgang aufgrund eines Aufbau-Rechenmodells mit Messwerten eines Coils voreingestellt und aufgrund eines Regelungs-Rechenmodells, das zumindest Messwerte für Zunder; Bandtemperatur; Beizmedium-Temperatur und / oder Säurekonzentration berücksichtigt, geregelt wird. Die Zundermenge braucht z.B. nicht mehr geschätzt zu werden, wie dies bisher geschehen ist. Es findet eine Integration von zusätzlichen Zunderberechnungs-Rechenmodellen statt. Die Zielgröße einer solchen Optimierung können sein: ein minimaler Energieeinsatz, variablere Coilfolgen, beschleunigte Reaktion auf Art und Menge der Oberflächenverunreinigungen, eine Minimierung des Beizeverbrauchs und der Beizeverluste, eine Minimierung der Überbeizung und eine Minimierung der Unterbeizung. Bei regelbaren Vorentzunderungseinheiten kann über Messgeräte zur Erfassung des Zunders, dessen Schichtdicke, Form, Verteilung und Farbe bestimmt werden. Hierzu dienen exakte Berechnungs-Rechenmodelle.The method is used in such a way that the pickling process is preset with measured values of a coil on the basis of a built-up calculation model and on the basis of a control calculation model that at least measures values for scale; Strip temperature; Pickling medium temperature and / or acid concentration is taken into account, is regulated. The amount of scale needs e.g. no longer being valued, as has been the case so far. There is an integration of additional scale calculation models. The goal of such an optimization can be: minimal energy consumption, more variable coil sequences, accelerated reaction to the type and amount of surface contamination, minimization of pickling consumption and pickling losses, minimization of over-pickling and minimization of under-pickling. In the case of adjustable pre-descaling units, measuring devices for detecting the scale, its layer thickness, shape, distribution and color can be used. Exact calculation models are used for this.
In Ausgestaltung der Erfindung ist vorgesehen, dass aufgrund gemessener Werte für Zunderauflagen vor dem Beizteil, Stellglieder der Beize geregelt oder nachgeregelt werden. Dadurch wird eine Regelung des Beizteils mit geringstmöglichen Übertragungszeiten ermöglicht.In an embodiment of the invention, it is provided that, based on measured values for scale deposits in front of the pickling part, actuators of the pickling are regulated or readjusted. This enables regulation of the pickling section with the shortest possible transmission times.
Vorteilhafterweise wird im einzelnen so vorgegangen, dass zusätzlich Messwerte zu Zunderauflagen oder Belägen in einem Bereich in Bewegungsrichtung vor dem Beizteil erfasst werden und für das Nachstellen der Stellglieder des Beizteils und / oder im Abgleich von Mess- bzw. Rechenwerten eingesetzt werden. Weitere Parameter außerhalb des Beizteils werden dadurch berücksichtigt, dass aufgrund von Bandeingangs-Informationen des Coils und der Maschineneinstellung die Beizzeiten geregelt werden.Advantageously, the procedure is such that additional measured values for scale deposits or deposits are recorded in an area in the direction of movement in front of the pickling part and are used for readjusting the actuators of the pickling part and / or for comparing measured or calculated values. Additional parameters outside the pickling section are taken into account in that the pickling times are regulated based on the strip entrance information of the coil and the machine setting.
Ein anderer Verfahrensschritt sieht vor, dass die erfassten Messwerte über die Beläge oder den Zunder für eine Regelung einer dem Beizteil vorgeschalteten Vorbehandlungseinheit eingesetzt werden. Dadurch kann das Beizmedium aufgrund der Vorbehandlungseinheit noch genauer in seinen Parametern geregelt werden.Another method step provides that the recorded measured values via the deposits or the scale are used for regulating a pretreatment unit upstream of the pickling part. As a result, the pickling medium can be regulated even more precisely in its parameters due to the pretreatment unit.
Dabei ist es noch vorteilhaft, dass im Abgleich mit den Mess- oder Rechenwerten die Vorbehandlungseinheit und die Stellglieder des Beizteils nachgeregelt werden.It is also advantageous that the pretreatment unit and the actuators of the pickling part are readjusted in comparison with the measured or calculated values.
Die Einrichtung zum Beizen von gewalztem Metall-, insbesondere Stahlband, das in Behandlungsrichtung von einem Coil einer Beizanlage zuführbar ist, für die eine Regelung von mehreren Parametern vorgesehen ist, löst die gestellte Aufgabe dadurch, dass von Coil-Messwert- oder Informationsaufnehmern über ein Aufbau-Rechenmodell Messwerte über ein Regelungs-Rechenmodell auf die Stelleinheiten des Beizteils schaltbar sind. Dadurch kann der Beizteil ökonomischer und genauer geregelt betrieben werden, was zu den genannten Vorteilen führt.The device for pickling rolled metal, in particular steel strip, which can be fed in the treatment direction from a coil of a pickling system, for which a control of several parameters is provided, solves the task in that coil measurement or information sensors have a structure - Computational model Measured values can be switched to the control units of the pickling section using a control computing model. This allows the pickling section to be operated more economically and more precisely, which leads to the advantages mentioned.
In Ausgestaltung der Einrichtung wird vorgeschlagen, dass von Coil-Messwert- auf nehmern Messwerte in das Regelungs-Rechenmodell eingebbar sind. Das Aufbau-Rechenmodell nutzt hier allgemeine Eingangs-Informationen zu dem Metallband. Daraus können schon Zunderauflagen über Rechenansätze modellmäßig berechnet werden, um die langsamen und schnellen Stellglieder des Beizteils voreinzustellen oder im Abgleich nachzuregeln.In an embodiment of the device, it is proposed that measured values from coil measured value sensors can be entered into the control calculation model. The construction computing model uses general input information for the metal strip. From this, scale orders can already be calculated using calculation approaches to preset or adjust the slow and fast actuators of the pickling section.
Für einen anderen Anwendungsfall ist vorgesehen, dass Messwerte eines Messwertaufnehmers über die Beläge oder den Zunder für das Nachstellen der Stellgliedes des Beizteils verwendbar sind. Nach anderen Merkmalen ist vorgesehen, dass dem Beizteil eine Vorbehandlungseinheit vorgeschaltet ist, deren Messwerte in das Regelungs-Rechenmodell eingebbar sind. Bei Erkennen der Notwendigkeit und durch geeignete Auswertung der Coil- Informationen und der momentanen Maschineneinstellung kann die Vorbehandlungseinheit die Beizzeit beeinflussen. Die Vorbehandlungseinheit kann eine Vorwärmeinheit, ein mechanischer, ein abrasiver, ein hydromechanischer, ein laseroptischer oder ein schwingungstechnischer Entzunderer sein.For another application, it is provided that measured values from a transducer via the linings or the scale can be used to readjust the actuator of the pickling part. According to other features, it is provided that the pickling part is preceded by a pretreatment unit, the measured values of which can be input into the control computing model. The pretreatment unit can influence the pickling time if the necessity is recognized and the coil information and the current machine setting are evaluated appropriately. The pretreatment unit can be a preheating unit, a mechanical, an abrasive, a hydromechanical, a laser-optical or a vibration descaler.
Eine weitere Verbesserung ist dadurch gegeben, dass zwischen der Vorbehandlungseinheit und dem Beizteil eine Induktionsheizung für das Band eingeschaltet ist. Die induktive Vorwärmung des Metallbandes wird vor der Beize eingeschaltet und dient der schnellen Regelung der Metallband-Temperatur und der Einstellung der Metallband-Beiztemperatur.A further improvement is given by the fact that an induction heater for the strip is switched on between the pretreatment unit and the pickling part. The inductive preheating of the metal strip is switched on before the pickling and is used to quickly regulate the metal strip temperature and to set the metal strip pickling temperature.
In der Zeichnung sind Ausführungsbeispiele der Erfindung schematisch dargestellt und werden nachfolgend näher erläutert.Exemplary embodiments of the invention are shown schematically in the drawing and are explained in more detail below.
Es zeigen:Show it:
Fig. 1 ein Blockschaltbild der Coil- und Beizanlage mit Regelung in einerFig. 1 is a block diagram of the coil and pickling plant with control in one
Grundausführung,Basic,
Fig. 2 dasselbe Blockschaltbild in einer ersten Variante mit einem Messwertaufnehmer,2 the same block diagram in a first variant with a transducer,
Fig. 3 das Blockschaltbild in einer zweiten Variante mit einer Vorbehandlungseinheit,3 shows the block diagram in a second variant with a pretreatment unit,
Fig. 4 das Blockschaltbild in einer dritten Variante mit dem Messwertaufnehmer und der Vorbehandlungseinheit undFig. 4 shows the block diagram in a third variant with the transducer and the pretreatment unit and
Fig. 5 das Blockschaltbild in einer vierten Variante mit dem Messwertaufnehmer, der Vorbehandlungseinheit und einer Induktionsheizung. In der Grundausführung gemäß Fig. 1 läuft das Metallband 1 von einem Coil 2 in den Beizteil 3. Dabei werden Coil-fnformationen 4 von einem Informationsaufnehmer 4a und einem Informationsaufnehmer 4b in ein Aufbau-Rechenmodell 6 und / oder in ein Regelungs-Rechenmodell 8 eingegeben und programmgemäß verarbeitet. In dem Aufbau-Rechenmodell 6 können weitere Messwerte 7 berücksichtigt werden. Dadurch wird der Beizvorgang zusätzlich zu den Beizparametern aufgrund von vor dem Einlaufen des Metallbandes 1 in den Beizteil 3 innerhalb der Maschine 5 mit Stellgliedern festgestellten und / oder gemessenen Parametern des Coils 2 und / oder des Metallbandes 1 geregelt.Fig. 5 shows the block diagram in a fourth variant with the sensor, the pretreatment unit and an induction heater. In the basic embodiment according to FIG. 1, the metal strip 1 runs from a coil 2 into the pickling section 3. Here, coil information 4 is input by an information sensor 4a and an information sensor 4b into a superstructure computing model 6 and / or into a control computing model 8 and processed according to the program. Further measured values 7 can be taken into account in the construction computing model 6. As a result, in addition to the pickling parameters, the pickling process is regulated on the basis of parameters of the coil 2 and / or the metal strip 1 that have been determined and / or measured with actuators before the metal strip 1 enters the pickling part 3 within the machine 5.
Aufgrund einer ersten Varianten gemäß Fig. 2 werden neben der Voreinstellung der Beizparameter zusätzlich erfasste Messwerte über die Beläge bzw. den Zunder in einer Zundererfassung 10 mit einem Messwertaufnehmer M in dem Regelungs- Rechenmodell 8 verarbeitet. Der Beizvorgang wird jeweils (Fig. 1 bis 5) aufgrund des Aufbau-Rechenmodells 6 mit Messwerten des Coils 2 voreingestellt und aufgrund des Regelungs-Rechenmodells 8, das zumindest Messwerte für Zunder, Badtemperatur, Beizmediumtemperatur und / oder Säurekonzentration berücksichtigt, geregelt. Die zusätzlich gemessenen Werte für Zunderauflagen vor dem Beizteil 3 werden zur Regelung oder Nachregelung der Stellglieder in der Maschine 5 eingesetzt.On the basis of a first variant according to FIG. 2, in addition to the presetting of the pickling parameters, additionally measured values about the deposits or the scale are processed in a scale determination 10 with a measurement sensor M in the control computing model 8. The pickling process is preset in each case (FIGS. 1 to 5) on the basis of the built-up computing model 6 with measured values of the coil 2 and is regulated on the basis of the regulating computing model 8, which takes into account at least measured values for scale, bath temperature, pickling medium temperature and / or acid concentration. The additionally measured values for scale deposits in front of the pickling part 3 are used to regulate or readjust the actuators in the machine 5.
Aufgrund einer zweiten Variante gemäß Fig. 3 und einer geeigneten Auswertung der Coil-Information 4 erfolgt der Einsatz einer Vorbehandlungseinheit H, die die Beizzeit beeinflusst. Zusätzlich werden die langsamen und schnellen Stellglieder des Beizteils 3 im Abgleich von Mess- bzw. Rechenwerten aus dem Regelungs-Rechenmodell 8 nachgeregelt, insbesondere unter Berücksichtigung der veränderten Beizzeiten.Based on a second variant according to FIG. 3 and a suitable evaluation of the coil information 4, a pretreatment unit H is used which influences the pickling time. In addition, the slow and fast actuators of the pickling part 3 are readjusted in the comparison of measured or calculated values from the control computing model 8, in particular taking into account the changed pickling times.
Gemäß Fig. 4, einer dritten Variante, werden parallel zusätzlich Messwerte zu Zunderauflagen oder Belägen durch den Messwertaufnehmer M der Zundererfassung 10 in Bewegungsrichtung 9 vordem Beizteil 3 erfasst und für das Nachstellen der Stell- glieder des Beizteils 3 und / oder im Abgleich von Mess- oder Rechenwerten eingesetzt. Außerdem werden auf der Grundlage von Bandeingangs-Informationen des Coils 2 und der Maschineneinstellung die Beizzeiten geregelt. Die erfassten Messwerte über die Beläge oder den Zunder werden für eine Regelung einer dem Beizteil 3 vorgeschalteten Vorbehandlungseinheit H verwendet. Dabei werden im Abgleich mit den Mess- oder Rechenwerten die Vorbehandlungseinheit H und die Stellglieder des Beizteils 3 nachgeregelt.According to FIG. 4, a third variant, additional measured values for scale deposits or deposits are recorded in parallel by the measurement sensor M of the scale detector 10 in the direction of movement 9 in front of the pickling part 3 and for the adjustment of the members of the pickling part 3 and / or used in the comparison of measured or calculated values. In addition, the pickling times are regulated on the basis of strip input information from coil 2 and the machine setting. The measured values recorded on the deposits or the scale are used to regulate a pretreatment unit H upstream of the pickling part 3. The pre-treatment unit H and the actuators of the pickling part 3 are readjusted in comparison with the measured or calculated values.
Aufgrund einer vierten Variante gemäß Fig. 5 wird zusätzlich zu der Zundererfassung 10 und der Vorbehandlungseinheit H eine Induktionsheizung W zwischen dem Beizteil 3 und der Vorbehandlungseinheit H eingeschaltet. Die Beizzeit ist als Kontaktzeit von der zu reinigenden Oberfläche und dem Beizmedium definiert, die nötig ist, um die Verschmutzung vom Metallband 1 sicher abzutragen. Die Vorbehandlungseinheit H kann auch die Vorwärmeinheit in Form der Induktionsheizung W aufnehmen. Die Vorbehandlungseinheit H weist grundsätzlich einen mechanisch, abrasiv, hydrome- chaniseh, laseroptisch oder schwingungstechnisch wirkenden Entzunderer auf. Eine induktive Vorwärmung des Metallbandes 1 durch die Induktionsheizung W wird vor dem Beizteil 3 eingebaut und dient der schnellen Regelung der Metallband- und der Beizmediumtemperatur. 5, an induction heater W is switched on between the pickling part 3 and the pretreatment unit H in addition to the scale detection 10 and the pretreatment unit H. The pickling time is defined as the contact time between the surface to be cleaned and the pickling medium, which is necessary to reliably remove the dirt from the metal strip 1. The pretreatment unit H can also accommodate the preheating unit in the form of the induction heater W. The pretreatment unit H basically has a mechanical, abrasive, hydromechanical, laser-optical or vibration-technical descaler. An inductive preheating of the metal strip 1 by the induction heater W is installed in front of the pickling part 3 and serves to quickly regulate the metal strip and the pickling medium temperature.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Metallband1 metal band
2 Coil2 coil
3 Beizteil3 pickling section
4 Coil-Information4 Coil information
4a Informationsaufnehmer4a information recorders
4b Informationsaufnehmer4b information recorders
5 Maschine mit Stellglieder5 machine with actuators
6 Aufbau-Rechenmodell6 Structure calculation model
7 Messwerte7 measured values
8 Regelungs-Rechenmodell8 Control calculation model
9 Bewegungsrichtung9 Direction of movement
10 Zundererfassung10 scale detection
M MesswertaufnehmerM sensor
H VorbehandlungseinheitH pretreatment unit
W Induktionsheizung W induction heating

Claims

Patentansprüche claims
1. Verfahren zum Beizen von gewalztem Metall- , insbesondere von Stahlband, das einem geregelten Beizvorgang zugeführt wird, dadurch gekennzeichnet, dass der Beizvorgang zusätzlich zu den Beizmediumparametern aufgrund von vor dem Einlaufen des Metallbandes in den Beizteil festgestellten und / oder gemessenen Parametern des Coils und / oder des Metallbandes geregelt wird.1. A method for pickling rolled metal, in particular steel strip, which is fed to a controlled pickling process, characterized in that the pickling process in addition to the pickling medium parameters due to parameters of the coil determined and / or measured before the metal strip enters the pickling part and / or the metal strip is regulated.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass der Beizvorgang aufgrund eines Aufbau-Recheήmodells mit Messwerten eines Coils voreingestellt und aufgrund eines Regelungs-Rechenmodells, das zumindest Messwerte für Zunder, Bandtemperatur, Beizmediumtemperatur und / oder Säurekonzentration berücksichtigt, geregelt wird.2. The method according to claim 1, characterized in that the pickling process is preset on the basis of a build-up calculation model with measured values of a coil and on the basis of a control computing model which takes into account at least measured values for scale, strip temperature, pickling medium temperature and / or acid concentration.
3. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass aufgrund gemessener Werte für Zunderauflagen vor dem Beizteil, Stellglieder der Beize geregelt oder nachgeregelt werden. 3. The method according to any one of claims 1 or 2, characterized in that based on measured values for scale deposits before the pickling part, actuators of the pickle are regulated or readjusted.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass zusätzlich Messwerte zu Zunderauflagen oder Belägen in einem Bereich in Bewegungsrichtung vor dem Beizteil erfasst werden und für das Nachstellen der Stellglieder des Beizteils und / oder im Abgleich von Mess- bzw. Rechenwerten eingesetzt werden.4. The method according to any one of claims 1 to 3, characterized in that in addition measured values for scale deposits or coatings are recorded in an area in the direction of movement in front of the pickling part and for the adjustment of the actuators of the pickling part and / or in the comparison of measured or calculated values be used.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass aufgrund von Bandeingangs-Informationen des Coils und der Maschineneinstellung die Beizzeiten geregelt werden.5. The method according to any one of claims 1 to 4, characterized in that the pickling times are regulated on the basis of strip input information of the coil and the machine setting.
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die erfassten Messwerte über die Beläge oder den Zunder für eine Regelung einer dem Beizteil vorgeschalteten Vorbehandlungseinheit eingesetzt werden.6. The method according to any one of claims 1 to 5, characterized in that the measured values detected via the deposits or the scale are used for regulating a pretreatment unit upstream of the pickling part.
7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass im Abgleich mit den Mess- oder Rechenwerten die Vorbehandlungseinheit und die Stellglieder des Beizteils nachgeregelt werden.7. The method according to claim 6, characterized in that the pretreatment unit and the actuators of the pickling part are readjusted in comparison with the measured or calculated values.
8. Einrichtung zum Beizen von gewalztem Metall-, insbesondere von Stahlband, das i 'n Behandlungsrichtung von einem Coil einer Beizanlage zuführbar ist , für die eine Regelung von mehreren Parametern vorgesehen ist, dadurch gekennzeichnet, dass von Coil-Messwert- oder Informationsaufnehmern (4a; 4b) über ein Aufbau-Rechenmodell (6) Messwerte über ein Regelungs-Rechenmodell (8) auf die Stelleinheiten des Beizteils schaltbar sind. 8. The device for pickling a rolled metal, in particular steel strip, the i 'n treatment direction from a coil of a pickling plant is fed, is provided for the regulation of several parameters, characterized in that from coil measured value or Informationsaufnehmern (4a ; 4b) Measured values can be switched to the actuating units of the pickling part via a control computing model (8) via a built-up computing model (6).
9. Einrichtung nach Anspruch 8, dadurch gekennzeichnet, dass von Coil-Messwertaufnehmem (4a; 4b) Messwerte in das Regelungs- Rechenmodell (8) eingebbar sind.9. Device according to claim 8, characterized in that measured values from coil measuring sensors (4a; 4b) can be input into the control computing model (8).
10. Einrichtung nach einem der Ansprüche 8 oder 9, dadurch gekennzeichnet, dass Messwerte eines Messwertaufnehmers (M) über die Beläge oder den Zunder für das Nachstellen der Stellglieder des Beizteils (3) verwendbar sind.10. Device according to one of claims 8 or 9, characterized in that measured values of a transducer (M) on the coatings or the scale can be used for adjusting the actuators of the pickling part (3).
11. Einrichtung nach einem der Ansprüche 8 oder 9, dadurch gekennzeichnet, dass dem Beizteil (3) eine Vorbehandlungseinheit (H) vorgeschaltet ist, deren Messwerte in das Regelungs-Rechenmodell (8) eingebbar sind.11. Device according to one of claims 8 or 9, characterized in that the pickling part (3) is preceded by a pretreatment unit (H), the measured values of which can be input into the control computing model (8).
12. Einrichtung nach einem der Ansprüche 7 bis 11 , dadurch gekennzeichnet, dass zwischen der Vorbehandlungseinheit (H) und dem Beizteil (3) eine Induktionsheizung ( W) für das Band (1) eingeschaltet ist. 12. Device according to one of claims 7 to 11, characterized in that an induction heater (W) for the belt (1) is switched on between the pretreatment unit (H) and the pickling part (3).
PCT/EP2001/001683 2000-02-16 2001-02-15 Method and device for pickling rolled metal, in particular steel strip WO2001061073A2 (en)

Priority Applications (8)

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JP2001559906A JP2003528978A (en) 2000-02-16 2001-02-15 Method and apparatus for pickling rolled metal strips, especially steel strips
CA002399754A CA2399754A1 (en) 2000-02-16 2001-02-15 Method and device for pickling rolled metal, in particular steel strip
KR1020027008889A KR20020077879A (en) 2000-02-16 2001-02-15 Method and device for pickling rolled metal, in particular steel strip
AU2001246436A AU2001246436A2 (en) 2000-02-16 2001-02-15 Method and device for pickling rolled metal, in particular steel strip
SK1185-2002A SK11852002A3 (en) 2000-02-16 2001-02-15 Method and device for pickling rolled metal, in particular steel strip
EP01919285A EP1257687A2 (en) 2000-02-16 2001-02-15 Method and device for pickling rolled metal, in particular steel strip
AU4643601A AU4643601A (en) 2000-02-16 2001-02-15 Method and device for pickling rolled metal, in particular steel strip
BR0107950-6A BR0107950A (en) 2000-02-16 2001-02-15 Method and device for pickling rolled metal, especially steel strip

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DE10007080.9 2000-02-16
DE10007080 2000-02-16
DE10062869.9 2000-12-16
DE10062869A DE10062869A1 (en) 2000-02-16 2000-12-16 Method and device for pickling rolled metal, in particular steel strip

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US20030015259A1 (en) 2003-01-23
CZ20022770A3 (en) 2003-03-12
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AU2001246436A2 (en) 2001-08-27
CA2399754A1 (en) 2001-08-23
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PL362146A1 (en) 2004-10-18
EP1257687A2 (en) 2002-11-20

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