Publication detail

Operational experiences with the optimization of secondary cooling

ŠTĚTINA, J. MAUDER, T. KLIMEŠ, L. MASARIK, M.

Czech title

Provozní zkušenosti s optimalizací sekundárního chlazení

English title

Operational experiences with the optimization of secondary cooling

Type

conference paper

Language

en

Original abstract

Surface temperatures of cast slabs at small radius segments in front of as well as at the unbending point belong to parameters that affect the surface quality of continuously cast slabs. Older machines for continuous casting were designed with regard to the performance (to amount of cast slabs) rather than to the quality. Therefore, the adaptation of secondary cooling is required in order to accomplish the desired surface temperatures. The modification consists in the dynamic control of secondary cooling, surface temperatures monitoring by means of the numerical model of temperature field as well as in a prospective replacement of cooling nozzles. The paper deals with relationships of described influences and their impacts to the temperature field of cast slabs. The results are presented for the 1530x250 mm slabs that are cast in Evraz Vitkovice Steel where the main authors dynamic 3D solidification model is used to control the production. The results and experiences obtained after the replacement of cooling nozzles are compared to long-time operational data for the preceding setup of cooling nozzles. The comparison is performed with the use of data acquired from the dynamic solidification model and with the use of the statistical operational data.

Czech abstract

Povrchové teploty na litých desek v malých poloměru segmentů v přední části, stejně jako na neochvějný bodu patří k parametrům, které ovlivňují kvalitu povrchové plynule litých desek. Starší stroje pro kontinuální lití byly navrženy s ohledem na výkon (k množství litých desek), spíše než na kvalitu. Proto je nutná úprava sekundární chlazení za účelem vykonání požadované povrchové teploty. Modifikace spočívá v dynamické řízení sekundárního chlazení, sledování teploty povrchu pomocí numerického modelu teplotního pole, stejně jako v prospektivní nahrazení chladicích trysek. Příspěvek se zabývá vztahy popsaných vlivů a jejich dopadů na teplotní oblasti litých desek. Výsledky jsou prezentovány na mm desky 1530x250, které jsou odevzdaných v Evraz Vítkovice Steel, kde je hlavní autoři dynamický 3D tuhnutí model použitý k řízení výroby. Výsledky a zkušenosti získané po výměně chladicích trysek je ve srovnání s dlouhodobých provozních dat pro předchozí nastavení chladicích trysek.Srovnání se provádí s použitím dat získaných z dynamického modelu tuhnutí a s použitím statistických provozních dat.

English abstract

Surface temperatures of cast slabs at small radius segments in front of as well as at the unbending point belong to parameters that affect the surface quality of continuously cast slabs. Older machines for continuous casting were designed with regard to the performance (to amount of cast slabs) rather than to the quality. Therefore, the adaptation of secondary cooling is required in order to accomplish the desired surface temperatures. The modification consists in the dynamic control of secondary cooling, surface temperatures monitoring by means of the numerical model of temperature field as well as in a prospective replacement of cooling nozzles. The paper deals with relationships of described influences and their impacts to the temperature field of cast slabs. The results are presented for the 1530x250 mm slabs that are cast in Evraz Vitkovice Steel where the main authors dynamic 3D solidification model is used to control the production. The results and experiences obtained after the replacement of cooling nozzles are compared to long-time operational data for the preceding setup of cooling nozzles. The comparison is performed with the use of data acquired from the dynamic solidification model and with the use of the statistical operational data.

Keywords in Czech

optimalizace teplotního pole, povrchové teploty, chladicí křivky

Keywords in English

optimization of temperature field, surface temperature, cooling of nozzles

RIV year

2014

Released

23.06.2014

Publisher

Austrian Society for Metallurgy and Materials (ASMET)

Location

Leoben, Austria

ISBN

978-3-200-03664-2

Book

Proceedings of the 8th European Continuous Casting Conference ECCC 2014

Pages from–to

1181–1190

Pages count

10

BIBTEX


@inproceedings{BUT108151,
  author="Josef {Štětina} and Tomáš {Mauder} and Lubomír {Klimeš} and Miloš {Masarik},
  title="Operational experiences with the optimization of secondary cooling",
  booktitle="Proceedings of the 8th European Continuous Casting Conference ECCC 2014",
  year="2014",
  month="June",
  pages="1181--1190",
  publisher="Austrian Society for Metallurgy and Materials (ASMET)",
  address="Leoben, Austria",
  isbn="978-3-200-03664-2"
}