EP1106713B1 - Verfahren zur Ermittlung einer Beizzeit eines eine Zunderschicht aufweisenden Metallbandes - Google Patents
Verfahren zur Ermittlung einer Beizzeit eines eine Zunderschicht aufweisenden Metallbandes Download PDFInfo
- Publication number
- EP1106713B1 EP1106713B1 EP00126992A EP00126992A EP1106713B1 EP 1106713 B1 EP1106713 B1 EP 1106713B1 EP 00126992 A EP00126992 A EP 00126992A EP 00126992 A EP00126992 A EP 00126992A EP 1106713 B1 EP1106713 B1 EP 1106713B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- information
- scale
- metal strip
- item
- bath
- 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.)
- Expired - Lifetime
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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
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
-
- 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
-
- 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 for determining a Pickling time of a scale layer, for removal the scale layer in a pickling bath to be treated metal strip.
- the composition of this scale depends on the specific cooling process, since depending on the cooling of the hot metal strip, different iron oxides are formed or different phases are formed. In particular, these are Wüstit Struktur (FeO), magnetite (Fe 3 O 4 ) and hematite (Fe 2 O 3 ), also occur to various Fe (II) and Fe (III) hydroxides.
- the scale must be removed in a subsequent descaling process. As part of this, first a mechanical descaling and then a removal of the scale in a pickling bath is carried out.
- a pickling liquid is mainly hot hydrochloric acid (HCl) with a temperature between 80 - 90 ° C used
- the bath is usually divided into several zones in which the hydrochloric acid concentration is different.
- a low concentration eg 4%
- the highest concentration eg 15-17 ° C
- Seesumu Yamaguchi and others describe a mathematical model in the publication "Improvement in the descaling of hot strip by hydrochloric acid" ISIJ International, Vol. 34 (1994), No. 8, pp. 670-678, Iron & Steel Inst of Japan, Tokyo. which describes the descaling process using hydrochloric acid.
- the time required for complete descaling depends on various factors such as acid temperature, acid concentration, Degree of mechanical descaling and especially of the Quantity and type of scale from.
- As a measure of the amount of scale Only the reel temperature, ie the temperature, with which the hot strip is e.g. after hot rolling before the Descaling is wound up on a reel, and experience about the scaling of different types of steel used.
- the required pickling time is based on some of the roughly estimated above. The quality control the stained tapes only visually by a Checker instead.
- the required pickling time is only rough estimated. This can contribute to unsatisfactory piecing results lead to a short pickling time.
- the pickling time is as short as possible to achieve the highest possible throughput.
- Another disadvantage is the only visual control. It gives no objective measure of the degree of scaling The result depends heavily on the respective inspector and can vary greatly from layer to layer. One useful assessment criterion for determining a more accurate Pickling time is not achieved thereby.
- the invention is thus based on the problem, a possibility to indicate how the pickling time will be determined more accurately can.
- the Pickling time by means of a calculation model based on at least one band specific information of the scale metal strip and modeled at least one information specific to the particular bath is an adaptation of or to determine the Beizzeit used models based on the automatic Surface scanning of the pickled metal strip resulting Information is provided.
- the quality of the pickling process can only be checked using the pickled metal strip.
- the information about the appearance of the stained surface and thus about the presence of any residual scale or the like is also for optimizing pickling time modeling relevant.
- the information obtained from this remains in determining the pickling time largely disregarded.
- an adaptation of the model (s) used on the basis of a automatic surface scanning of the stained metal strip resulting information occurs.
- the state of Technique becomes the surface of the stained metal band automatically scanned, for example by means of a camera, the provides corresponding images, which in terms of any Restzunders, whose type or structure and quantity analyzed become.
- the analysis result becomes automatic adaptation the models used to optimize these and resulting to increase the accuracy of the modeled pickling time.
- the pickling time is used calculated and modeled a computer model and no longer roughly estimated using given parameters.
- the calculation model which is for example a neural network or a fuzzy controller can act, however also any other model can be used, processed at least one band-specific information of the scaled Metal bands, so an information that the tinder describes itself or the formation of scale and for the accruing Band is specific. Furthermore, at least one attributable to specific information, since for determination the pickling time, of course, the concrete descaling properties of the pickling bath are relevant.
- At least one of the educated Scale layer self descriptive information and / or one for the formation of the scale layer during the Production of the metal band relevant information and / or one for a performed mechanical treatment of the metal strip Information relevant to mechanical scale removal be used.
- Each of these individual information holds for itself a considerable information content, the Evaluated and processed by the computer model. Although only one of these information is processed can be, it has proved to be advantageous if several or all be considered, as the pickling time so can be modeled more accurately, the more information regarding the scale layer and its pre-treatment available stand.
- Important information is the surface-specific information, a description of the scaled bandober surface provides.
- This information can according to the invention by an optical surface scan by means of an image of the Tape surface delivering camera whose image automatically to Determination of a surface covered with scale Information value is analyzed.
- the information value leaves a classification of the different ones Tinder types and / or the amount of tinder. Every kind of tinder appears slightly different in a picture shot of her coloring or structure forth.
- the picture taken with the camera can be analyzed in this respect, so that on the basis of this Surface scanning a classification to be made can.
- the analytically obtained information value So a quantitative measure of the actual Amount of scale.
- Scale layer Another in the context of modeling the optimized pickling time important information is concerning the formation of the Scale layer itself.
- one for the manufacturing process of the metal strip specific information is used, in particular for this purpose the temperature of the metal strip during winding up a reel, one concerning the cooling process of the metal strip Information, a degree of deformation of the metal strip concerned Information, a chemical reaction behavior used for scaling information.
- Relevant are also information regarding the steel grade itself, concerning the oxygen partial pressure of the ambient atmosphere etc. All this information can be found in the model be taken into account. It is this information indirect information, that is information, which do not describe the tinder itself, but indirectly reflect its educational conditions.
- the descaling can be so much easier and faster, the more extensive the mechanical pre-descaling is. Consequently, also provides the relevant information an important model parameter.
- the invention can as information in this regard at least one mechanical Parameters of the stretch straightener treatment, in which the Machined metal strip for mechanical descaling will be used.
- the metal band guided under tension around several pulleys.
- mechanical parameter can, for example, the applied Tension or the degree of deflection and thus the bend of the metal strip can be used.
- the bath temperature, the Bath composition, the bath concentration, existing in the bathroom Turbulence or the iron concentration in the bath considered become.
- a first embodiment of the invention can be used for education the scale layer relevant during the manufacturing process
- Information processed in a scaling model and a modeled informational value describing the tinder can be determined with the in the context of the analysis of the surface scan image adjusted information value and determines a value describing the degree of scaling which is the mathematical model for modeling the pickling time is given.
- a scale formation model which also for example, a neural network can be a tinder descriptive modeled information value determines which indicates a measure of the degree of scaling.
- This Scaling degree is calculated with the information value from the surface scan, which is also a measure of the scale or tinder amount, adjusted and from this a value describing the actual degree of scaling determined.
- This value represents a measure of the degree of scaling which is based on the described information parameters was determined. For larger deviations of the two Measures can be used the more plausible value at minor deviations is one, possibly weighted, Average value makes sense. This value will then be the Computational model for modeling the pickling time given.
- all information can be the calculation model be given directly for processing, that is, a prior determination of the degree of descaling Measure does not take place here, but all go Sizes directly into the calculation model.
- Fig. 1 shows a diagram for illustrating the modeling method according to a first embodiment of the invention.
- Step 1 is an optical surface scan using a camera that delivers an image that in an analysis model 2, which is a neural Net can be treated, recycled.
- the continuously from the continuously funded metal strip be recorded becomes a first information value determined in the form of a measure, which is a measure of the type and amount of the tinder is. It thus takes place on the basis of the analysis model a classification of the different types of scale and a quantitative determination of the amount of scale.
- step 3 information about the manufacturing process of the metal strip in a scaling model 4 for Determination of a second information value in the form of a measure processed, this measure also the degree of scaling describes.
- information here can indirect Measured variables such as the reel temperature, the degree of deformation, the cooling process of the metal strip, so for example the cooling steps, the cooling time, etc. or else the storage of the metal strip during cooling as well as the chemical reaction behavior of the metal itself in the context of Scale formation to be considered.
- step 5 takes place Balancing the two with the analytical model and the scaling model Measured measures to a measure of 6 (it can also several measures are determined) for the degree of scaling to investigate. As shown in Fig.
- the measure determined in step 6 for the degree of scaling is given to a calculation model 7 for determining the pickling time.
- This computational model will also receive information, see step 8 given by the mechanical descaling, for example in the form of a measure or a parameter concerning the given tensile stress during a stretch straightening treatment the metal band to break up the closed Scale layer.
- the calculation model 7, see Step 9, information about the pickling bath such as the bath temperature, the acid concentration, etc. given.
- All of the information, ie the part of the computational model, which also preferably is formed as a neural network in the steps 6, 8, 9 information contained are processed to determine an optimal pickling time T pickling. Based on the large number of processed information collected in the model, the pickling time can be modeled very accurately.
- the pickling time is given, for example, to an automatic controller which controls the entire pickling treatment. On the control side, depending on the optimized pickling time, an increase or decrease in the conveying speed of the metal strip takes place and thus a change in the residence time of the strip in the pickling bath.
- step 10 a Surface scanning of the pickled metal strip for testing of the result.
- This can in turn be a Camera are used, which continuously take pictures of the Surface delivers that evaluated with an analysis model become. Based on this surface scan is a determination the Restzunders on the pickled tape possible, where Here too, both the type and the quantity are determined can.
- the result is used to adapt the used ones Models 2, 4, 7 are used. For example can, if the scaling in exceptional cases the quality specifications should exceed, corrects the respective model become.
- that can Result also used directly for controlling the pickling treatment be and be given to the controller. For example, if the scan is a non-negligible one Residual scale amount out, so can control side according to the pickling time adjusted and extended.
- models are also fuzzy Regulator usable.
- Fig. 2 shows in the form of a diagram a second embodiment of the invention.
- the same data as described with reference to FIG. 1 are detected.
- the data of the optical surface scanning are also processed here in the analysis model 2.
- all information is given directly to the computer model 7 for modeling the optimal pickling time T Beiz . It is therefore not determined as with respect to FIG. 1 based on the information of the optical surface scanning and the information about the manufacturing process, a measure of the degree of scaling, which in turn is processed in the computer model. Rather, the "raw data" is given directly to the calculation model 7 here.
- This can also be a neural network, which, however, preferably but not necessarily also all other described models, is capable of learning.
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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)
Description
- Fig. 1
- ein Diagramm zur Darstellung des Modellierungsverfahrens der Beizzeit gemäß einer ersten Erfindungsausgestaltung, und
- Fig. 2
- ein Diagramm zur Darstellung des Modellierungsverfahrens gemäß einer zweiten Erfindungsausgestaltung.
Claims (13)
- Verfahren zur Ermittlung einer Beizzeit eines eine Zunderschicht aufweisenden, zur Entfernung der Zunderschicht in einem Beizbad zu behandelnden Metallbandes, bei welchem Verfahren die Beizzeit mittels eines Rechenmodells anhand wenigstens einer bandspezifischen Information des verzunderten Metallbands und wenigstens einer beizbadspezifischen Information modelliert wird, wobei eine Adaption des oder der zur Ermittlung der beizzeitverwendeten Modelle anhand einer aus einer automatischen Oberflächenabtastung des gebeizten Metallbands resultierenden Information erfolgt.
- Verfahren nach Anspruch 1, bei welchem als bandspezifische Information wenigstens eine die gebildete Zunderschicht selbst beschreibende Information und/oder eine für die Bildung der Zunderschicht während der Herstellung des Metallbands relevante Information und/oder eine für eine durchgeführte mechanische Behandlung des Metallbands zur mechanischen Zunderentfernung relevante Information verwendet wird.
- Verfahren nach Anspruch 2, bei welchem als die die Zundeschicht beschreibende Information eine durch eine automatische Abtastung der Oberfläche des zu beizenden Metallbands erhaltenen oberflächenspezifischen Information verwendet wird.
- Verfahren nach Anspruch 3, bei welchem zur Erzeugung der oberflächenspezifischen Information durch eine optische Oberflächenabtastung eine ein Bild der Bandoberfläche liefernde Kamera verwendet wird, deren Bild automatisch zur Ermittlung eines die mit Zunder belegten Oberfläche beschreibenden Informationswerts analysiert wird.
- Verfahren nach Anspruch 4, bei welchem als Informationswert ein die Zunderart angebender Informationswert und/oder ein die Zundermenge pro Flächeneinheit angebender Informationswert ermittelt wird.
- Verfahren nach einem der Ansprüche 2 bis 5, bei welchem als für die Bildung der Zunderschicht relevante Information eine für das Herstellungsverfahren des Metallbands spezifischen Information verwendet wird.
- Verfahren nach Anspruch 6, bei welchem als für das Herstellungsverfahren spezifische Information die Temperatur des Metallbands beim Aufwickeln auf eine Haspel, eine den Kühlvorgang des Metallbands betreffende Information, eine der Lagerung des Metallbands während der Abkühlung betreffende Information, eine das chemische Reaktionsverhalten zur Zunderbildung betreffende Information verwendet wird.
- Verfahren nach einem der Ansprüche 2 bis 7, bei welchem das Metallband zur mechanischen Zunderentfernung mit einem Streckrichter behandelt wird und als für die durchgeführte mechanische Behandlung des Metallbands zur mechanischen Zunderentfernung relevante Information wenigstens ein mechanischer Parameter der Streckrichterbehandlung verwendet wird.
- Verfahren nach einem der vorangehenden Ansprüche, bei welchem als badspezifische Information die Badtemperatur, die Badzusammensetzung, die Badkonzentration, im Bad vorhandene Turbulenzen, die Eisenkonzentration im Bad berücksichtigt werden.
- Verfahren nach einem der Ansprüche 2 bis 9, bei welchem die für die Bildung der Zunderschicht während des Herstellungsverfahrens relevante Information in einem Zunderbildungsmodell verarbeitet und ein den Zunder beschreibender modellierter Informationswert ermittelt wird, der mit dem im Rahmen der Analyse des Oberflächenabtastungsbilds ermittelten Informationswert abgeglichen und ein den Verzunderungsgrad beschreibender Wert ermittelt wird, der dem Rechenmodell zur Modellierung der Beizzeit gegeben wird.
- Verfahren nach einem der Ansprüche 1 bis 9, bei welchem die Informationen dem Rechenmodell zur Verarbeitung direkt gegeben werden.
- Verfahren nach einem der vorangehenden Ansprüche, bei welchem als Modelle neuronale Netze verwendet werden.
- Verfahren nach einem der Ansprüche 1 bis 11, bei welchem als Modelle Fuzzy Regler verwendet werden.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19959204A DE19959204A1 (de) | 1999-12-08 | 1999-12-08 | Verfahren zur Ermittlung einer Beizzeit eines eine Zunderschicht aufweisenden Metallbandes |
DE19959204 | 1999-12-08 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1106713A2 EP1106713A2 (de) | 2001-06-13 |
EP1106713A3 EP1106713A3 (de) | 2002-07-31 |
EP1106713B1 true EP1106713B1 (de) | 2005-06-22 |
Family
ID=7931875
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00126992A Expired - Lifetime EP1106713B1 (de) | 1999-12-08 | 2000-12-08 | Verfahren zur Ermittlung einer Beizzeit eines eine Zunderschicht aufweisenden Metallbandes |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1106713B1 (de) |
AT (1) | ATE298375T1 (de) |
DE (2) | DE19959204A1 (de) |
ES (1) | ES2244389T3 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10031978A1 (de) * | 2000-06-30 | 2002-01-10 | Sms Demag Ag | Verfahren und Vorrichtung zur automatischen Zundererkennung aus Oberflächen von metallischem Bandgut, insbesondere von warmgewalztem Stahlband und Edelstahlband |
FR2925530B1 (fr) * | 2007-12-21 | 2010-08-27 | Siemens Vai Metals Tech Sas | Installation et procede pour le decapage en continu de bandes d'acier |
WO2010006895A1 (de) * | 2008-07-16 | 2010-01-21 | Siemens Aktiengesellschaft | Betriebsverfahren für eine ein metallband bearbeitende bearbeitungseinrichtung und anlage zum bearbeiten eines metallbandes |
DE102011017371B3 (de) * | 2011-04-16 | 2012-07-19 | Technische Universität Bergakademie Freiberg | Verfahren zur Verbesserung der Oberflächenqualität von Halbzeugen aus Stahl bei der Warmumformung |
WO2021058044A1 (de) * | 2019-09-26 | 2021-04-01 | Siedentop Gmbh | Automatisierte beizzeitwahl |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL6401445A (de) * | 1964-02-18 | 1965-08-19 | ||
DE19508476A1 (de) * | 1995-03-09 | 1996-09-12 | Siemens Ag | Leitsystem für eine Anlage der Grundstoff- oder der verarbeitenden Industrie o. ä. |
DE19508474A1 (de) * | 1995-03-09 | 1996-09-19 | Siemens Ag | Intelligentes Rechner-Leitsystem |
KR100464580B1 (ko) * | 1997-03-03 | 2005-02-28 | 가부시끼가이샤 히다치 세이사꾸쇼 | 산세정플랜트의제어방법과그산세정플랜트 |
JP3518316B2 (ja) * | 1997-03-03 | 2004-04-12 | 株式会社日立製作所 | 酸洗プラントの制御方法とその酸洗プラント |
DE19743022A1 (de) * | 1997-09-29 | 1999-04-01 | Siemens Ag | Verfahren und Einrichtung zum Beizen eines Metallbandes |
-
1999
- 1999-12-08 DE DE19959204A patent/DE19959204A1/de not_active Withdrawn
-
2000
- 2000-12-08 ES ES00126992T patent/ES2244389T3/es not_active Expired - Lifetime
- 2000-12-08 AT AT00126992T patent/ATE298375T1/de active
- 2000-12-08 EP EP00126992A patent/EP1106713B1/de not_active Expired - Lifetime
- 2000-12-08 DE DE50010598T patent/DE50010598D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ES2244389T3 (es) | 2005-12-16 |
EP1106713A3 (de) | 2002-07-31 |
DE19959204A1 (de) | 2001-07-12 |
DE50010598D1 (de) | 2005-07-28 |
EP1106713A2 (de) | 2001-06-13 |
ATE298375T1 (de) | 2005-07-15 |
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