WO2000005014A1 - Installation de coulee et de laminage en continu - Google Patents

Installation de coulee et de laminage en continu Download PDF

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Publication number
WO2000005014A1
WO2000005014A1 PCT/DE1999/002107 DE9902107W WO0005014A1 WO 2000005014 A1 WO2000005014 A1 WO 2000005014A1 DE 9902107 W DE9902107 W DE 9902107W WO 0005014 A1 WO0005014 A1 WO 0005014A1
Authority
WO
WIPO (PCT)
Prior art keywords
casting
slabs
thin slab
sequences
computing device
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.)
Ceased
Application number
PCT/DE1999/002107
Other languages
German (de)
English (en)
Inventor
Hans-Peter BÜRVENICH
Gerhard Dachtler
Rüdiger WELLER
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.)
Siemens AG
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Siemens Corp
Original Assignee
Siemens AG
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Siemens Corp
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 Siemens AG, Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV, Siemens Corp filed Critical Siemens AG
Priority to EP99963118A priority Critical patent/EP1107841B1/fr
Priority to AU59658/99A priority patent/AU748189B2/en
Priority to DE59903053T priority patent/DE59903053D1/de
Priority to AT99963118T priority patent/ATE225688T1/de
Publication of WO2000005014A1 publication Critical patent/WO2000005014A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations

Definitions

  • the invention relates to a method for operating a casting and rolling plant, in particular a thin slab casting and rolling plant, with a computing device, a plurality of slabs which belong to different production orders being produced on the casting and rolling plant within sequences.
  • the invention also relates to a casting and rolling system, in particular a thin slab casting and rolling system, with a computing device, a plurality of frames which belong to different production orders being able to be produced on the casting and rolling system within sequences.
  • Such methods for operating casting and rolling systems, as well as such casting and rolling systems are generally known and are in frequent use.
  • casting and rolling plants are subject to technical restrictions which result, for example, from the downtimes of parts of the plant.
  • the division of the operation of the casting and rolling plant into individual sequences is a consequence of such technical restrictions.
  • the object of the invention is a method for operating a casting and rolling plant, in particular one
  • Thin slab caster to create that enables optimized operation.
  • This object is achieved according to the invention in a method of the type mentioned at the outset in that the sequence of the slabs belonging to the production orders within the sequences is determined by means of a genetic algorithm using the computing device, and in that the casting and rolling system is controlled by the computing device in accordance with the determined sequence.
  • the object is achieved according to the invention by using a genetic algorithm to determine the sequence of the slabs belonging to the production orders within the sequences.
  • the genetic algorithm is able to take into account the technical and order-related restrictions in an optimized way.
  • a sequence of the slabs within the sequences can be generated which, despite the restrictions mentioned, enables operation thereof which is optimized, for example with regard to the utilization of the casting and rolling system.
  • the sequence of the slabs belonging to the production orders within the sequences is determined with the computing device by means of an event-oriented evaluation, and the casting and rolling system is controlled by the computing device in accordance with the determined sequence.
  • the method according to the invention can be used particularly well in thin slab casting and rolling plants. Due to the existing, even more extensive technical restrictions, the genetic algorithm is particularly well suited to guarantee optimized plant operation.
  • FIG. 1 shows a schematic block diagram of an exemplary embodiment of a thin slab casting and rolling plant according to the invention
  • Figure 2 shows a schematic representation of an example
  • FIG. 3 shows a schematic block diagram of an exemplary embodiment of a method according to the invention for operating the thin slab casting and rolling plant of FIGS. 1, and
  • FIG. 4 shows a schematic representation of product-dependent sequences of the
  • FIG. 1 shows a thin slab casting and rolling system 1 which is intended for the production of sheet metal, for example.
  • CFT tunnel furnace
  • HSM Hot Strip Mill
  • the electric furnace 10 is followed by an alloy pan 11 and a degassing system 12, which have the functions already described in connection with the casting strand 2. This is followed by a casting plant 13.
  • slabs are produced which pass through the tunnel furnace 5.
  • the slabs go directly from the respective distributors into the tunnel kiln. Within the tunnel kiln 5 these slabs can be buffered at least briefly and it is also possible to pull individual slabs forward.
  • a distributor as well as molds and segments through which the melt is poured and turned into slabs are provided for each slab to form the slabs.
  • the distance between the molds and the segments can be adjusted so that the width and thickness of the slab can be adjusted.
  • the slabs produced are not stored in the thin-slab casting-rolling plant 1 in FIG. 1. Instead, the slabs are immediately fed to the hot rolling mill 6. As is indicated in FIG. 1 by the reference number 15, the slabs are successively fed to the hot rolling system 6 for processing, that is to say no longer two slabs simultaneously or in parallel, as is the case in the tunnel kiln 5.
  • the slabs are passed through pairs of rolls several times and thereby reduced in thickness.
  • the hot strip is formed, which has approximately thicknesses between 1 mm and 12 mm.
  • the hot rolling mill 6 is often followed by a cold rolling mill, with which the slabs are subjected to a further reduction in thickness.
  • the end product is At the exit of the cold rolling mill, the cold strip, which is, for example, a sheet with a thickness of 0.8 mm to 1 mm.
  • the parts of the thin slab casting and rolling mill 1 described each have certain service lives.
  • the distributors of the casting plants 9, 13 must be cleaned, warmed up and, if necessary, also partially renewed after a certain amount of liquid steel has been carried out.
  • the rolls In the hot rolling mill 6 and the cold rolling mill, the rolls have to be replaced after a certain rolled length of slabs that have been carried out. These processes are known as armaments or set-ups.
  • the equipment of the casting plants 9, 13 can be done independently of one another at different times.
  • the hot rolling mill is set up without interrupting the casting processes.
  • the armor on the casting and rolling systems 9, 13 interrupts the continuous casting of slabs. The interval between two set ups is called a sequence.
  • FIG. 2 it is is a diagram over the time t, which indicates the chronological sequence of processes in the tunnel furnace 5.
  • the tunnel kiln 5 is traversed by two strands 16, 17 with successive slabs.
  • Each of these strands consists of successive sequences 18 and armor 19.
  • Each of the sequences 18 is composed of individual melts 20, with specific slabs 21 being assigned to the individual melts 20.
  • the sequences 18 and armors 19 result, as described, from the downtimes of the parts of the thin slab casting and rolling mill 1.
  • the melts 20, which are also referred to as heats, are different steels, for example different steel brands, which are transmitted via the different casting strands 2, 3, 4 are generated and fed to the tunnel furnace 5.
  • the slabs 21, which are also referred to as slabs, each have e.g. the steel brand of the melt 20 from which they were produced. As shown in FIG. 2, several slabs 21 can be produced from one of the melts 20.
  • FIG. 2 shows an example of how the first sequence 18 in the strand 17 is composed of a total of four melts 20, which in turn are provided for the production of a total of 87 slabs 21.
  • the melts 20 must belong to a so-called family of steel brands. Only after armor 19 can melts 20 with other steel brands be used. This represents a technical restriction for the thin slab caster 1.
  • sequences 18 depend on the service lives of the parts of the thin slab caster 1. This represents a further technical restriction for the thin slab caster 1.
  • the width and the thickness of the slabs can be influenced by means of the molds and the segments. However, this is not possible at will. For example, the width of the slabs can only be changed from a larger width towards a smaller width within the same sequence. In this way, there are further technical restrictions for the thin slab caster 1 which must be taken into account when operating the same.
  • order-related restrictions include, for example, the steel brand and the quality of the steel that is desired and should be used in a production order.
  • Another order-related restriction of a production order consists in the desired thickness and width of the end product to be manufactured, e.g. the desired sheet.
  • the quantity or tonnage of the respective production order also represents an order-related restriction.
  • FIG. 3 shows a method for operating the thin slab casting and rolling plant 1, with which the aforementioned technical and order-related restrictions can be taken into account.
  • the method of FIG. 3 represents a combination of a genetic algorithm and an event-oriented evaluation.
  • a starting or starting solution is first defined, in order to then determine an iteration process for the operation of the thin slab casting and rolling mill 1. If an abort criterion is met, the process is ended. The best determined solution is then a solution with which the thin slab caster 1 with regard to technical and order-related restrictions can be optimized.
  • FIG. 3 shows a block 22 which is provided for determining and defining the solution space. There, a user enters all the data required for carrying out the method into a computing device. This process is also called coding.
  • the computing device determines a first solution with which the existing technical and order-related restrictions on the
  • Thin slab caster 1 could be met.
  • This first solution represents a proposal as to how the individual slabs belonging to the production orders are to be produced one after the other on the thin slab caster 1.
  • the first solution which is also called the starting solution, is a solution in which the thin slab caster 1 would be operated rather unsatisfactorily.
  • the first solution determined in block 22 is evaluated by the computing device. For this purpose, an event-oriented assessment based on the existing starting solution is carried out.
  • the operation of the thin slab caster 1 is simulated by the computing device with the values of the starting solution.
  • the technical restrictions of the thin slab caster 1 are taken into account in this simulation. These include the operating parameters of the thin slab caster 1, e.g. the number of casting strands 2, 3, 4, the number and type of casting plants 9, 13, the number of strands of slabs passed through the tunnel kiln 5, the number and type of rolls of the hot rolling plant 6, and the like. It is also the data that characterize the technical restrictions, for example the possible widths and thicknesses of the slabs or the jump distances or the like.
  • simulation results can include, among other things, the processing time required to fulfill a specific production order. It can be the time periods that result for the individual sequences 18 when using the first solution. It can be the utilization of the thin slab caster 1 resulting from this starting solution. Such and other simulation results can be determined by the computing device and made available as output information from block 23.
  • the computing device makes a selection based on the simulation result provided.
  • the criterion for this selection is the quality of the simulation result. This quality is calculated by the computing device from the simulation result, with a view to fulfilling the technical and order-related restrictions as optimally as possible.
  • the thin slab caster 1 should be used as well as possible.
  • the individual parts of the thin slab caster 1 should be used as well as possible.
  • Thin slab caster 1 should also be used as well and evenly as possible.
  • the existing casting strands 2, 3, 4 and casting plants 9, 13 are to be operated as synchronously as possible.
  • the longest possible service life of the Parts of the thin slab caster 1 can be reached. As little scrap as possible should arise in the entire manufacturing process.
  • the delivery dates specified in the individual production orders should be adhered to.
  • the intended requirements for the end product to be manufactured, for example the width, the quality, and the like, should be observed.
  • Such and other criteria can be taken into account by the computing device when determining the quality of the simulation result provided by block 23 in block 24.
  • a genetic algorithm is applied to the current generation of solutions.
  • the individual values of the solution are a selection and / or one Recombination and / or mutation. These measures are also referred to as genetic operators.
  • the aforementioned selection is understood to mean a reproduction in which certain values of the solution are increased depending on their quality.
  • values of the solution are exchanged with one another and, if necessary, additionally combined with one another.
  • certain values of the solution are changed individually and new values are added if necessary.
  • the resulting new solution is fed back to block 23.
  • an evaluation of the solution is carried out there.
  • the determined simulation results are then fed to block 24, which, as also described, determines the quality of the simulation results and, depending on this, continues or terminates the method.
  • This solution is an optimized solution which is the basis for the operation of the thin slab casting and rolling system 1.
  • sequences 25, 27 each follow armor.
  • melts 28 there are a plurality of melts 28 which are provided for producing a large number of slabs 29.
  • the slabs 29 are no longer “any” slabs, but rather specific slabs that determine them
  • Production orders 30 31 are assigned. This results from FIG. 4 in that the individual slabs 29 are provided with identifiers, the second number of which indicates the respective production order 30, 31, and the first number of which indicates the number of the slab 29 within the production order 30, 31.
  • the "slab 4.1" means the fourth slab 29 of the first production order 30.
  • Thin slab caster 1 thereupon such that the sequence of sequences 26, 27 shown in FIG. 4 is produced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • General Factory Administration (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

L'invention concerne un procédé permettant de faire fonctionner une installation de coulée et de laminage en continu, en particulier une installation de coulée et de laminage en continu de brames minces, à l'aide d'un ordinateur. Sur l'installation de coulée et de laminage en continu est produite, dans des séquences (26, 27), une pluralité de brames (29) correspondant à des commandes de production (30, 31) différentes. La succession des brames (29) correspondant aux commandes de production (30, 31), dans les séquences (26, 27), est déterminée par l'ordinateur au moyen d'un algorithme génétique. L'installation de coulée et de laminage en continu est commandée par l'ordinateur en fonction de la succession déterminée.
PCT/DE1999/002107 1998-07-21 1999-07-08 Installation de coulee et de laminage en continu Ceased WO2000005014A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP99963118A EP1107841B1 (fr) 1998-07-21 1999-07-08 Installation de coulee et de laminage en continu
AU59658/99A AU748189B2 (en) 1998-07-21 1999-07-08 Continuous casting installation, especially a thin slab continuous casting installation
DE59903053T DE59903053D1 (de) 1998-07-21 1999-07-08 Giesswalzanlage, insbesondere dünnbrammengiesswalzanlage
AT99963118T ATE225688T1 (de) 1998-07-21 1999-07-08 Giesswalzanlage, insbesondere dünnbrammengiesswalzanlage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19832762A DE19832762C2 (de) 1998-07-21 1998-07-21 Gießwalzanlage, insbesondere Dünnbrammengießwalzanlage
DE19832762.5 1998-07-21

Publications (1)

Publication Number Publication Date
WO2000005014A1 true WO2000005014A1 (fr) 2000-02-03

Family

ID=7874804

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1999/002107 Ceased WO2000005014A1 (fr) 1998-07-21 1999-07-08 Installation de coulee et de laminage en continu

Country Status (5)

Country Link
EP (1) EP1107841B1 (fr)
AT (1) ATE225688T1 (fr)
AU (1) AU748189B2 (fr)
DE (2) DE19832762C2 (fr)
WO (1) WO2000005014A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002024380A1 (fr) * 2000-09-25 2002-03-28 Siemens Aktiengesellschaft Procede et dispositif permettant de faire fonctionner une installation dans l'industrie des matieres premieres
CN1308100C (zh) * 2000-09-29 2007-04-04 纽科尔公司 按定单提供钢带的方法
WO2010051981A1 (fr) * 2008-11-04 2010-05-14 Sms Siemag Ag Procédé et dispositif de commande de la solidification d'une barre de coulée dans une installation de coulée continue lors de la mise en marche du processus de coulée
CN106611221A (zh) * 2016-12-21 2017-05-03 重庆大学 一种用于解决连铸机故障的炼钢‑连铸重调度方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10112681B4 (de) * 2000-03-31 2004-02-12 International Business Machines Corp. Computersystem mit Verfahren zum Planen von Vorgängen in einem Stahlwerk und Programmspeichereinrichtung zum Durchführen des Verfahrens
US6581672B2 (en) 2000-09-29 2003-06-24 Nucor Corporation Method for controlling a continuous strip steel casting process based on customer-specified requirements
US7591917B2 (en) 2000-10-02 2009-09-22 Nucor Corporation Method of producing steel strip
DE10310357A1 (de) * 2003-03-10 2004-09-30 Siemens Ag Gießwalzanlage zur Erzeugen eines Stahlbandes

Citations (3)

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Publication number Priority date Publication date Assignee Title
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
DE19623671A1 (de) * 1996-02-02 1997-08-07 Siemens Ag Verfahren und System zur zeitlichen Regelung einer Anlage der Grundstoffindustrie

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE19623671A1 (de) * 1996-02-02 1997-08-07 Siemens Ag Verfahren und System zur zeitlichen Regelung einer Anlage der Grundstoffindustrie

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FERNANDEZ A ET AL: "FIRST OPERATING RESULTS OF HYLSA'S CSP PLANT", CAHIERS D'INFORMATIONS TECHNIQUES DE LA REVUE DE METALLURGIE,FR,REVUE DE METALLURGIE. PARIS, vol. 93, no. 4, April 1996 (1996-04-01), pages 541-549, XP000623493, ISSN: 0035-1563 *
KRUEGER B ET AL: "SALDANHE STEEL - DIE NEUE MINIMILL-PRODUKTIONSLINIE FUER DUENNE FLACHERZEUGNISSE HOHER QUALITAET", STAHL UND EISEN,DE,VERLAG STAHLEISEN GMBH. DUSSELDORF, vol. 117, no. 11, 10 November 1997 (1997-11-10), pages 81-93,154, XP000737189, ISSN: 0340-4803 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002024380A1 (fr) * 2000-09-25 2002-03-28 Siemens Aktiengesellschaft Procede et dispositif permettant de faire fonctionner une installation dans l'industrie des matieres premieres
US6665572B2 (en) 2000-09-25 2003-12-16 Siemens Aktiengesellschaft Method and device for operating an installation of a primary industry
CN1308100C (zh) * 2000-09-29 2007-04-04 纽科尔公司 按定单提供钢带的方法
WO2010051981A1 (fr) * 2008-11-04 2010-05-14 Sms Siemag Ag Procédé et dispositif de commande de la solidification d'une barre de coulée dans une installation de coulée continue lors de la mise en marche du processus de coulée
CN102216003A (zh) * 2008-11-04 2011-10-12 Sms西马格股份公司 用于在起动铸造过程时控制铸坯铸造设备中的铸坯的凝固的方法和装置
CN106611221A (zh) * 2016-12-21 2017-05-03 重庆大学 一种用于解决连铸机故障的炼钢‑连铸重调度方法
CN106611221B (zh) * 2016-12-21 2018-11-30 重庆大学 一种用于解决连铸机故障的炼钢-连铸重调度方法

Also Published As

Publication number Publication date
AU5965899A (en) 2000-02-14
EP1107841B1 (fr) 2002-10-09
EP1107841A1 (fr) 2001-06-20
AU748189B2 (en) 2002-05-30
DE19832762C2 (de) 2003-05-08
DE19832762A1 (de) 2000-01-27
ATE225688T1 (de) 2002-10-15
DE59903053D1 (de) 2002-11-14

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