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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F12%3APU98873" target="_blank" >RIV/00216305:26210/12:PU98873 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JG - Metallurgy, metal materials

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2012

Confidentiality

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

Article name in the collection

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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Number of pages

6

Pages from-to

36-41

Publisher name

Tanger Ltd., Ostrava

Place of publication

Ostrava

Event location

Brno

Event date

May 23, 2012

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000318506500021