EP3539690A1 - Procédé pour éviter des fluctations du niveau du métal dans une lingotière pendant use séquence de moulage - Google Patents

Procédé pour éviter des fluctations du niveau du métal dans une lingotière pendant use séquence de moulage Download PDF

Info

Publication number: EP3539690A1
Authority: EP; European Patent Office
Prior art keywords: casting; parameters; subset; changed; casting parameters
Prior art date: 2018-03-12
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP19161853.7A

Other languages

German (de)

English (en)

Other versions

EP3539690B1 (fr

Inventor

Thomas Heimann

Holger Beyer-Steinhauer

Heinz-Jürgen Oudehinken

Uwe Plociennik

Christoph Tischner

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

SMS Group GmbH

Original Assignee

SMS Group GmbH

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

2018-03-12

Filing date

2019-03-11

Publication date

2019-09-18

2019-03-11 Application filed by SMS Group GmbH filed Critical SMS Group GmbH

2019-09-18 Publication of EP3539690A1 publication Critical patent/EP3539690A1/fr

2021-08-25 Application granted granted Critical

2021-08-25 Publication of EP3539690B1 publication Critical patent/EP3539690B1/fr

Status Active legal-status Critical Current

2039-03-11 Anticipated expiration legal-status Critical

Links

238000005266 casting Methods 0.000 title claims abstract description 92
238000000034 method Methods 0.000 title claims abstract description 39
239000002184 metal Substances 0.000 claims abstract description 3
229910052751 metal Inorganic materials 0.000 claims abstract description 3
238000001816 cooling Methods 0.000 claims description 17
238000012544 monitoring process Methods 0.000 claims description 15
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
239000007921 spray Substances 0.000 claims description 8
239000007788 liquid Substances 0.000 claims description 3
239000011521 glass Substances 0.000 claims description 2
230000005499 meniscus Effects 0.000 claims 1
230000007423 decrease Effects 0.000 abstract description 3
230000003449 preventive effect Effects 0.000 abstract description 3
230000000694 effects Effects 0.000 description 4
238000013016 damping Methods 0.000 description 2
238000009749 continuous casting Methods 0.000 description 1
230000001419 dependent effect Effects 0.000 description 1
238000004519 manufacturing process Methods 0.000 description 1
239000000463 material Substances 0.000 description 1
150000002739 metals Chemical class 0.000 description 1
230000010355 oscillation Effects 0.000 description 1
239000000843 powder Substances 0.000 description 1
238000003303 reheating Methods 0.000 description 1
238000005096 rolling process Methods 0.000 description 1

Images

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
- B22D11/20—Controlling or regulating processes or operations for removing cast stock
- B22D11/201—Controlling or regulating processes or operations for removing cast stock responsive to molten metal level or slag level
- 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
- 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
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
- 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
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
- B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling

Definitions

the invention relates to a method for avoiding G stealadorschwankungen during a casting sequence for casting metals in a G confusestrang.
the invention relates in particular G manualschwankungen as they occur as a result of so-called dynamic bulging.
This term refers to the phenomenon that under constant casting conditions during a casting sequence, no or only very low pouring mirror fluctuations occur below a predetermined critical threshold value over a long period of time, and then suddenly the pouring mirror oscillations oscillate beyond the said threshold value for no apparent reason. This behavior is similar to the resonance behavior of a vibratory system when it is excited at its natural frequency. Without countermeasures, the casting sequence would have to be aborted.
the current casting speed by about 0.1 m / min. reduced.
the cooling is raised as a countermeasure, this is preferably done in the cooling zone along the strand guide, where the dynamic bulging occurs, or there, in the zone where the causes for the dynamic Bulging are suspected. It is known to determine this cooling zone in question, for example, by a frequency analysis, wherein the frequency of the G manLiteschwankungen compared with the roller distances and so can be deduced on the relevant zone or the relevant segment.
the present invention is therefore based on the object, a known method for avoiding critical G manapttikschwankache to that effect to further develop that said disadvantages in the fight against occurred dynamic Bulging be avoided.
the inventive method is particularly suitable for casting processes that are susceptible to G confuseadorschwankept. These are in particular current casting processes in which dynamic bulging had already occurred once. Also susceptible are new casting processes which are similar in form, i. H. with similar materials, dimensions, casting speeds, casting powder, etc., have been performed before in the past and at that time had often encountered dynamic bulging.
the interval ranges within which the casting parameters are changed according to step b) are substantially smaller than the interval ranges within which the G intelligentparameter according to step a) to be changed.
the method steps in particular the monitoring of the G recognizeadorschwankache with respect to the undershooting or exceeding a predetermined threshold during a G mansequenz, repeated or continuously.
the casting parameters are reset from the subset and / or the successive change of the individual randomly selected casting parameters according to b) only after a predetermined waiting time dtB> 0, for example 10 Minutes, if no monitoring of the level of the pouring glass above the threshold was detected during this monitoring period.
a predetermined waiting time dtB also the time between the change of pouring parameters, in other words the time until the next preventive change of a pouring parameter Casting parameter, but primarily serves to establish and define that there is no dynamic bulging.
the waiting time dtB is always greater than the dead time dtT selected.
the method according to the invention also provides in this case for carrying out step a) in claim 1 with strong changes of the casting parameters from the subset.
the casting process is continuously or continuously monitored for the occurrence of dynamic bulging. Specifically, this is done by monitoring the pouring level in the mold with regard to exceeding a predetermined threshold. If the G confuseschwankacheschwankungen exceed the predetermined threshold, the presence of Bulging is concluded; as long as the threshold falls below, it is assumed that no bulging exists.
the idle time dtT is initially pre-occupied with 0 and immediately either the cooling is amplified, i. H. the amount of spray increases, for example by 10%, or the casting speed is reduced, for example also by 10%. Subsequently, the said dead time is redetermined depending on the actual casting speed and / or the position within the strand guide, where the emergence of the dynamic Bulgings is suspected. This position can be determined, for example, with the aid of the method of frequency analysis known in the prior art.
the predetermined waiting time dtB is reduced, for example halved.
the monitoring of the casting process for bulging continues, in particular to determine whether the change in cooling or casting speed made has had an effect on the desired damping of the dynamic bulge.
Another change to the said parameters cooling or casting speed takes place only after the dead time redefined in the last run dtT. As long as this dead time has not been exceeded, the monitoring is continued continuously with respect to the dynamic bulging, but without the cooling or the casting speed being changed.
a parameter from a predefined set of pouring parameters is randomly selected, and initially, if this parameter has not yet been changed - initially changed in the plus direction. Meanwhile, and thereafter, the casting process is further monitored for dynamic bulging, and when the waiting time dtB has been exceeded again, a pouring parameter from the set of pouring parameters is randomly selected and changed. If the same parameter has already been changed, it will now be changed in the opposite direction to its original direction of change.
the said quantity of pouring parameters includes said subset of pouring parameters. Only one pouring parameter is randomly selected and then changed. It is not intended to change several casting parameters at the same time.
the waiting time is not yet been exceeded, the monitoring is continued without changing a casting parameter until the waiting time is exceeded again. In other words, within the expiration of a waiting period, only one (number word) pouring parameter is ever changed.
interval ranges in which the casting parameters according to the inventive method are preventively changed to avoid future dynamic bulging are as follows: - casting speed +/- 0.02m / min; - Height of the water level +/- 5 mm; - Liquid Core Reduction LCR +/- 0.5 mm; - Dip tube depth +/- 10 mm; - casting width +/- 5 mm; - target temperatures +/- 2 ° C; - Power of cooling (spray water volumes) +/- 2%.

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Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Continuous Casting (AREA)

EP19161853.7A 2018-03-12 2019-03-11 Procédé pour éviter des fluctations du niveau du métal dans une lingotière pendant use séquence de moulage Active EP3539690B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE102018203666.7A DE102018203666A1 (de)	2018-03-12	2018-03-12	Verfahren zur Vermeidung von Gießspiegelschwankungen während einer Gießsequenz

Publications (2)

Publication Number	Publication Date
EP3539690A1 true EP3539690A1 (fr)	2019-09-18
EP3539690B1 EP3539690B1 (fr)	2021-08-25

Family

ID=65763334

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP19161853.7A Active EP3539690B1 (fr)	2018-03-12	2019-03-11	Procédé pour éviter des fluctations du niveau du métal dans une lingotière pendant use séquence de moulage

Country Status (2)

Country	Link
EP (1)	EP3539690B1 (fr)
DE (1)	DE102018203666A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CN111679625B (zh) *	2020-06-29	2021-10-29	马鞍山钢铁股份有限公司	一种快速、准确、多维度连铸机结晶器液面波动的评价方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2504986A1 (de)	1975-02-04	1976-08-05	Mannesmann Ag	Verfahren und vorrichtung zur kontrolle und vermeidung einer kritischen verformung der strangschale
EP1095720A1 (fr) *	1999-10-25	2001-05-02	SMS Demag AG	Cadre de guidage d'une machine de coulée continue en particulier pour brames d'acier minces
DE102011017550A1 (de) *	2010-04-26	2011-10-27	Sms Siemag Ag	Stranggießverfahren und Stranggießanlage zur Durchführung des Stranggießverfahrens
WO2014177605A1 (fr) *	2013-05-03	2014-11-06	Tbr Casting Technologies Gmbh	Procédé et dispositif pour réguler la surface de métal liquide dans une lingotière

2018
- 2018-03-12 DE DE102018203666.7A patent/DE102018203666A1/de not_active Withdrawn
2019
- 2019-03-11 EP EP19161853.7A patent/EP3539690B1/fr active Active

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2504986A1 (de)	1975-02-04	1976-08-05	Mannesmann Ag	Verfahren und vorrichtung zur kontrolle und vermeidung einer kritischen verformung der strangschale
EP1095720A1 (fr) *	1999-10-25	2001-05-02	SMS Demag AG	Cadre de guidage d'une machine de coulée continue en particulier pour brames d'acier minces
DE102011017550A1 (de) *	2010-04-26	2011-10-27	Sms Siemag Ag	Stranggießverfahren und Stranggießanlage zur Durchführung des Stranggießverfahrens
WO2014177605A1 (fr) *	2013-05-03	2014-11-06	Tbr Casting Technologies Gmbh	Procédé et dispositif pour réguler la surface de métal liquide dans une lingotière

Also Published As

Publication number	Publication date
EP3539690B1 (fr)	2021-08-25
DE102018203666A1 (de)	2019-09-12

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Publication	Publication Date	Title
EP3539690B1 (fr)	2021-08-25	Procédé pour éviter des fluctations du niveau du métal dans une lingotière pendant use séquence de moulage
EP2445667B1 (fr)	2019-02-20	Procédé de réglage pour la surface de bain d'une coquille de coulée par faisceau
DE102006060673A1 (de)	2008-05-08	Verfahren und Regelvorrichtung zum Regeln der Wärmeabfuhr einer Seitenplatte einer Kokille
AT506847B1 (de)	2011-07-15	Verfahren zum stranggiessen eines metallstrangs
DE2424610A1 (de)	1974-12-12	Verfahren zur steuerung der sich beim kontinuierlichen giessen metallischer gusserzeugnisse bildenden erstarrungsstruktur mittels elektromagnetischer durchwirbelung
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DE69113326T2 (de)	1996-03-28	Verfahren und Vorrichtung zum Herstellen stählerner Doppel-T-Träger mit dünnem Steg.
EP0054867B1 (fr)	1985-03-13	Procédé de refroidissement de la barre dans la coulée continue d'acier
EP1917115B1 (fr)	2009-06-03	Procede et dispositif de mise en place d'au moins un segment a rouleaux d'un dispositif de guidage de barre sur une barre
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EP1585605A1 (fr)	2005-10-19	Procede et dispositif pour produire des brames d'acier par coulee continue
DE1758466B2 (de)	1975-03-20	Verfahren zum Stranggießen von Hohlsträngen
DE10011689A1 (de)	2001-09-13	Verfahren zum Stranggiessen von Brammen und insbesondere von Dünnbrammen
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AT522559B1 (de)	2022-10-15	Verfahren zum Regulieren der Aggregattemperatur beim Herstellen von Beton
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