OPTIMIZATION OF SECONDARY COOLING IN ORDER TO ACHIEVE HIGHER SURFACE TEMPERATURES AT THE SLAB UNBENDING POINT

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

OPTIMIZATION OF SECONDARY COOLING IN ORDER TO ACHIEVE HIGHER SURFACE TEMPERATURES AT THE SLAB UNBENDING POINT

Popis výsledku v původním jazyce

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. In order to optimize and control the secondary cooling, characteristics of nozzles and especially the influences of water flow rate, air pressure, casting speed and surface temperatures to the heat transfer coefficient under nozzles have to be known. Moreover, the heat transfer coefficient can be also influenced by the age of 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 Vítkovice Steel where the main authors dynamic 3D solidification model is used to control the production interface and runs in off-line version. Its results can be used as a preparation tool for the real casting process.

Název v anglickém jazyce

OPTIMIZATION OF SECONDARY COOLING IN ORDER TO ACHIEVE HIGHER SURFACE TEMPERATURES AT THE SLAB UNBENDING POINT

Popis výsledku anglicky

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. In order to optimize and control the secondary cooling, characteristics of nozzles and especially the influences of water flow rate, air pressure, casting speed and surface temperatures to the heat transfer coefficient under nozzles have to be known. Moreover, the heat transfer coefficient can be also influenced by the age of 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 Vítkovice Steel where the main authors dynamic 3D solidification model is used to control the production interface and runs in off-line version. Its results can be used as a preparation tool for the real casting process.

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Sborník příspěvků mezinárodní konference metalurgie a materiálů METAL 2012

ISBN

978-80-87294-29-1

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

36-41

Název nakladatele

Tanger Ltd., Ostrava

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

23. 5. 2012

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000318506500021