EP1070560B1 - Procédé pour réguler la vitesse de passage de l'eau de refroidissement à travers les parois larges de lingotières de coulée continue - Google Patents
Procédé pour réguler la vitesse de passage de l'eau de refroidissement à travers les parois larges de lingotières de coulée continue Download PDFInfo
- Publication number
- EP1070560B1 EP1070560B1 EP00114719A EP00114719A EP1070560B1 EP 1070560 B1 EP1070560 B1 EP 1070560B1 EP 00114719 A EP00114719 A EP 00114719A EP 00114719 A EP00114719 A EP 00114719A EP 1070560 B1 EP1070560 B1 EP 1070560B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling water
- casting
- flux density
- heat flux
- rate
- 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
Links
- 239000000498 cooling water Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000008569 process Effects 0.000 title abstract description 5
- 230000001105 regulatory effect Effects 0.000 title abstract description 4
- 238000009749 continuous casting Methods 0.000 title 1
- 238000005266 casting Methods 0.000 claims abstract description 51
- 230000004907 flux Effects 0.000 claims abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- 239000010949 copper Substances 0.000 claims abstract description 8
- 230000008859 change Effects 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- IHQKEDIOMGYHEB-UHFFFAOYSA-M sodium dimethylarsinate Chemical class [Na+].C[As](C)([O-])=O IHQKEDIOMGYHEB-UHFFFAOYSA-M 0.000 claims description 7
- 230000001050 lubricating effect Effects 0.000 claims description 5
- 238000013021 overheating Methods 0.000 claims description 2
- 230000000007 visual effect Effects 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims 2
- 230000033228 biological regulation Effects 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 230000005499 meniscus Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229910004709 CaSi Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 206010061217 Infestation Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007562 laser obscuration time method Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 230000007704 transition Effects 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
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
Definitions
- the invention relates to a method for regulating the cooling water flow rate through mold broadsides from the start of casting to reaching a target casting speed.
- exothermic casting powders are often used, which form a sufficient liquid phase in a short time to ensure a lubrication film for the start of casting.
- a steep increase in the heat flow density q [MW / m 2 ] of the mold cycles is observed, which is due to an excessively thin casting powder lubricating film in the meniscus area of the mold.
- the heat flow density q differs depending on the steel analysis and the casting powder used.
- Basic casting powder, base grade B> 1 is used in particular for crack-sensitive HSLA medium carbon steels, which reduce the heat transfer through the casting powder slag via a porous-crystalline partial layer on the copper side. This limits the material-specific heat flow density q of crack-sensitive steels.
- the calculation of the base degree of casting powder is well known from the literature.
- a plate mold for slabs is known, the mold walls Have cooling chambers that include limited cooling areas.
- a breakthrough early detection with satisfactory accuracy is based solely on the measurement the heat flows in the mold are not possible.
- EP 0 238 844 A1 discloses a method for casting on Stahlbandg tellstrom.
- the steel strip caster is equipped with a chilled mold Narrow side walls and broad side walls equipped.
- the mold points to Recording of a pouring tube above a format-determining parallel section in the area of the broad side walls, a pouring area extended upwards on. This results in a short casting time without the tape getting stuck achieved that the height of the casting mirror is traced that the Strip deduction between the filling of the format-determining parallel section of the Mold and covering the pouring tube outlet openings is started and up to Reaching the target mold level increased to a minimum take-off speed in which the bottom of the pouring sump is below the format-determining Parallel section remains.
- the object of the invention based on a mold cooling water regulation of the mold broadsides during the To specify casting starts with which an effective reduction of longitudinal crack infestation the starting slab is reached at a controlled pouring start, and which becomes Execution as part of an automatic sprue program without problems suitable.
- the object is achieved in a method of the type mentioned in the preamble of claim 1 with the invention in that the cooling water flow rate is adapted from an initially predetermined speed in accordance with a change in the heat flow density, such that when the heat flow density rises above the critical heat flow density "(q crit) the cooling water flow rate V mold , which can vary depending on the steel quality, is first reduced until the heat flow density q settles as a result of a restart of the cooling water flow rate at a desired heat flow density.
- the process can be of great advantage According to the invention, the critical heat flow density known from the literature (q crit) can be avoided.
- the method according to the invention for regulating the flow rate V mold of the mold cooling water takes into account the determination of the critical heat flow density q crit as a function of the steel quality and the casting powder used.
- One embodiment of the method provides that the flow rate of the cooling water (V mold ) through the mold is integrally reduced until the increase in the heat flow density below the "critical heat flow density increase (q crit) of 0.02 to 0.1 [MW / m 2 sec], preferably below a value of 0.05 MW / m 2 sec].
- the method according to the invention is further supported in that to support the rapid build-up of a casting powder lubrication film at the start of the sprue preferably exothermic casting powder can be used.
- Another influencing variable that helps regulate the mold water cycles is set according to the thickness of the copper plates.
- the inventive method also leads to reproducible, safe Results if it is based on an overheating temperature in the Tundish between T Liquidus + 25 and + 40 ° C before starting the sprue becomes.
- Figure 3 shows the result of the invention: If the heat flow densities q of the mold broad sides rise disproportionately above the calculated theoretical specific heat dissipation after the automatic casting start, the flow rate V mold of the mold broad sides is integrally reduced until the increase in heat flow densities dq below the critical heat flow density increase of 0.05 MW / m 2 / sec. Simultaneously with the flattening of the heat flow density increase dq, the flow rate V mold is increased depending on the copper plate thickness to the target flow rate.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Claims (10)
- Procédé de régulation de la vitesse de passage de l'eau de refroidissement Vlingotière à travers les parois larges d'une lingotière depuis le début de la coulée jusqu'à atteinte d'une vitesse de coulée théorique,
caractérisé en ce que
la vitesse de passage de l'eau de refroidissement est adaptée de manière intégrative à partir d'une vitesse prédéfinie au départ en fonction d'un changement de la densité de flux thermique de celle-ci et, en cas de hausse de la densité de flux thermique au delà de la « densité de flux thermique critique » (q crit), est diminuée jusqu'à ce que la densité de flux thermique tourne autour d'une densité de flux thermique souhaitée suite à une remontée de la vitesse de passage de l'eau de refroidissement. - Procédé selon la revendication 1,
caractérisé en ce que
la vitesse de passage de l'eau de refroidissement est diminuée de manière intégrative jusqu'à ce que la hausse de densité de flux thermique se situe en dessous de l' « augmentation de densité de flux thermique critique » (q crit) qui est de 0,02 à 0,1 [MW/m2 sec], de préférence en dessous d'une valeur de 0,05 [MW/m2 sec]. - Procédé selon la revendication 1 ou 2,
caractérisé en ce que
en même temps que le nivellement de l'augmentation de densité de flux thermique [MW/m2 sec], la vitesse de passage de l'eau de refroidissement est augmentée en fonction de l'épaisseur de plaque de la paroi large de la lingotière jusqu'à la vitesse de passage théorique. - Procédé selon la revendication 1, 2 ou 3,
caractérisé en ce que
pour assister la création rapide d'un film lubrifiant en poudre de lingotière, on utilise en début de coulée de préférence des poudres de lingotière exothermes. - Procédé selon l'une quelconque des revendications 1 à 4,
caractérisé en ce que
la régulation des circuits d'eau de la lingotière est réglée en fonction de l'épaisseur des plaques en cuivre. - Procédé selon l'une quelconque des revendications 1 à 5,
caractérisé en ce que
la vitesse de passage de l'eau de refroidissement est réglée en plus en fonction de la vitesse de coulée. - Procédé selon l'une quelconque ou plusieurs des revendications 1 à 6,
caractérisé en ce que
le démarrage de coulée et réalisé à l'aide d'un programme de coulée automatique. - Procédé selon l'une quelconque ou plusieurs des revendications 1 à 7,
caractérisé en ce que
on règle dans le répartiteur, avant le début de la coulée, une température de surchauffe allant de T liquidus + 25 à + 40° C. - Procédé selon l'une quelconque ou plusieurs des revendications 1 à 8,
caractérisé en ce que
en tenant compte à titre auxiliaire d'un contrôle visuel de la qualité de surface de la barre coulée, on corrige en plus la vitesse de passage de l'eau de refroidissement, le cas échéant avec d'autres paramètres de coulée. - Procédé selon l'une quelconque ou plusieurs des revendications 1 à 9,
caractérisé en ce que
pour réguler la vitesse de passage Vlingotière de l'eau de refroidissement de la lingotière, on tient compte de la définition de la densité de flux thermique théorique q crit en fonction de la qualité de l'acier et de la poudre de lingotière utilisée.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19933602 | 1999-07-17 | ||
| DE19933602 | 1999-07-17 | ||
| DE19953504 | 1999-11-06 | ||
| DE19953504A DE19953504A1 (de) | 1999-07-17 | 1999-11-06 | Verfahren zum Regeln der Kühlwasser-Durchflußgeschwindigkeit durch Kokillenbreitseiten |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1070560A1 EP1070560A1 (fr) | 2001-01-24 |
| EP1070560B1 true EP1070560B1 (fr) | 2004-12-01 |
Family
ID=26054229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00114719A Expired - Lifetime EP1070560B1 (fr) | 1999-07-17 | 2000-07-08 | Procédé pour réguler la vitesse de passage de l'eau de refroidissement à travers les parois larges de lingotières de coulée continue |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1070560B1 (fr) |
| AT (1) | ATE283744T1 (fr) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006060673A1 (de) * | 2006-11-02 | 2008-05-08 | Sms Demag Ag | Verfahren und Regelvorrichtung zum Regeln der Wärmeabfuhr einer Seitenplatte einer Kokille |
| EP2527061A1 (fr) * | 2011-05-27 | 2012-11-28 | Siemens VAI Metals Technologies GmbH | Procédé de refroidissement d'un faisceau métallique et vanne de commande pour l'ouverture et la fermeture intermittentes d'un flux volumique d'un fluide de refroidissement |
| DE102014112206A1 (de) * | 2014-08-26 | 2016-03-03 | Peter Valentin | Verfahren zum Stranggießen eines Metalls, insbesondere eines Stahls, und Vorrichtung zum Stranggießen |
| CN113828745B (zh) * | 2021-08-31 | 2023-03-21 | 南京钢铁股份有限公司 | 一种高强度动车制动盘用钢的大方坯连铸生产方法 |
| CN114619007B (zh) * | 2022-02-14 | 2024-03-08 | 包头钢铁（集团）有限责任公司 | 一种低合金高氮钢连铸坯的生产方法 |
| CN114918395B (zh) * | 2022-04-22 | 2024-04-16 | 首钢集团有限公司 | 一种结晶器冷却水流量的设定方法 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0101521B1 (fr) * | 1982-02-24 | 1986-11-05 | Kawasaki Steel Corporation | Procede de commande d'installation de moulage en continu |
| JPH01210157A (ja) * | 1988-02-15 | 1989-08-23 | Sumitomo Metal Ind Ltd | 連続鋳造スラブの表面縦割れ防止方法 |
| JP2896198B2 (ja) * | 1990-06-12 | 1999-05-31 | 川崎製鉄株式会社 | 耐水素誘起割れ性の優れた鋼の鋳造方法 |
| DE19722877C2 (de) * | 1997-05-31 | 1999-09-09 | Schloemann Siemag Ag | Flüssigkeitsgekühlte Stranggießkokille |
-
2000
- 2000-07-08 AT AT00114719T patent/ATE283744T1/de not_active IP Right Cessation
- 2000-07-08 EP EP00114719A patent/EP1070560B1/fr not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ATE283744T1 (de) | 2004-12-15 |
| EP1070560A1 (fr) | 2001-01-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE2734388C2 (de) | Verfahren und Vorrichtung zum Stranggießen | |
| DE69018863T2 (de) | Durchbruch-Feststellung beim Stranggiessen. | |
| EP0515010B1 (fr) | Mesure de la température à une lingotière pour brammes | |
| EP1103322B1 (fr) | Procédé pour la coulée continue de brames, en particulier de brames minces, et dispositif de mise en oeuvre du procédé | |
| DE69523720T2 (de) | Verfahren zur Herstellung eines metallischen Rohblocks für die plastische Umformung | |
| DE3509932A1 (de) | Verfahren zum anfahren einer stranggiessanlage | |
| EP1070560B1 (fr) | Procédé pour réguler la vitesse de passage de l'eau de refroidissement à travers les parois larges de lingotières de coulée continue | |
| EP1066898B1 (fr) | Procédé d'alimentation de métal liquide d'une machine de coulée continue | |
| DE10027324C2 (de) | Verfahren zum Gießen eines metallischen Strangs sowie System hierzu | |
| DD297703A5 (de) | Verfahren zur kontinuierlichen bestimmung der dicke einer fluessigen schlackenschicht auf der oberflaeche einer metallscmelze | |
| EP0052514A1 (fr) | Méthode et appareil pour contrôler la coulée par centrifugation d'un tuyau métallique | |
| EP0238844A1 (fr) | Procédé pour démarrer une machine de coulée continue d'acier en bande | |
| DE3421344A1 (de) | Verfahren und vorrichtung zum automatischen fuellen einer stranggiesskokille beim angiessen eines stranges | |
| DE3440236A1 (de) | Verfahren und vorrichtung zum bandstranggiessen von metallen, insbesondere von stahl | |
| DE102005024843B4 (de) | Verfahren zum Regeln der Schmalseitenkonizität einer Plattenkokille | |
| EP0449771B1 (fr) | Alimentation contrôlée de métal en fusion dans des coquilles d'une installation de coulée continue automatique | |
| DE19953504A1 (de) | Verfahren zum Regeln der Kühlwasser-Durchflußgeschwindigkeit durch Kokillenbreitseiten | |
| EP0234491B1 (fr) | Procédé pour terminer l'opération de coulée dans une installation de coulée de bandes d'acier | |
| JPH10137911A (ja) | 鋼の連続鋳造法 | |
| DE19916190C2 (de) | Verfahren und Vorrichtung zum Stranggießen von Brammen | |
| EP1013362B1 (fr) | Procédé et installation de coulée en continu de brames | |
| EP1432539B1 (fr) | Procede et dispositif de refoidissement des plaques de cuivre d'une coquille pour la coulee continue de metaux liquides, en particulier d'acier liquide | |
| KR100530464B1 (ko) | 돌발적인 탕면레벨변화에 대응하기 위한 탕면레벨제어방법 | |
| DE69000282T2 (de) | Verfahren und vorrichtung zur herstellung von duennen metallprodukten mittels strangguss. | |
| DE112016007049T5 (de) | GIEßLEHRE UND GIEßVERFAHREN UNTER VERWENDUNG DERSELBEN |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20000708 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT DE ES IT NL |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| AKX | Designation fees paid |
Free format text: AT DE ES IT NL |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT DE ES IT NL |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20041201 |
|
| REF | Corresponds to: |
Ref document number: 50008806 Country of ref document: DE Date of ref document: 20050105 Kind code of ref document: P |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20050312 |
|
| NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed |
Effective date: 20050902 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 20101223 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20101228 Year of fee payment: 11 Ref country code: DE Payment date: 20101222 Year of fee payment: 11 |
|
| REG | Reference to a national code |
Ref country code: AT Ref legal event code: MM01 Ref document number: 283744 Country of ref document: AT Kind code of ref document: T Effective date: 20110708 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20120201 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 50008806 Country of ref document: DE Effective date: 20120201 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110708 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110708 |