Publication detail

Influence of Water Temperature on the Cooling Intensity during Continuous Casting and Hot Rolling

HNÍZDIL, M. RAUDENSKÝ, M.

Original Title

Influence of Water Temperature on the Cooling Intensity during Continuous Casting and Hot Rolling

English Title

Influence of Water Temperature on the Cooling Intensity during Continuous Casting and Hot Rolling

Type

conference paper

Language

en

Original Abstract

Two types of nozzles were tested to find out the influence of the water temperature on cooling intensity. The first type was a mist nozzle used in the secondary cooling area of a steel slab casting machine. The second type was a flat fan nozzle usually used during hot rolling and heat treatment process of rolled strips. These laboratory measurements of cooling intensity were performed in a temperature range of water temperature from 20 C to 80 C. A strong influence of the water temperature on cooling intensity was found. Changing the water temperature from 20 C to 80 C caused a change of heat transfer coefficient. For mist nozzle was found slightly increasing cooling intensity with growing water temperature. The difference was about 30 W m-2 K-1. For flat fan nozzle was found the decreasing cooling intensity with growing water temperature. The difference was about 110 W m-2 K-1. The main effect was not the change of heat transfer coefficient but the shift of Leidenfrost temperature to a lower temperature area. The change of water temperature from 20 C to 80 C caused the change of Leidenfrost temperature about 130 C for both nozzles. This can be a significant change of cooling and can affect the cooling character in industrial applications.

English abstract

Two types of nozzles were tested to find out the influence of the water temperature on cooling intensity. The first type was a mist nozzle used in the secondary cooling area of a steel slab casting machine. The second type was a flat fan nozzle usually used during hot rolling and heat treatment process of rolled strips. These laboratory measurements of cooling intensity were performed in a temperature range of water temperature from 20 C to 80 C. A strong influence of the water temperature on cooling intensity was found. Changing the water temperature from 20 C to 80 C caused a change of heat transfer coefficient. For mist nozzle was found slightly increasing cooling intensity with growing water temperature. The difference was about 30 W m-2 K-1. For flat fan nozzle was found the decreasing cooling intensity with growing water temperature. The difference was about 110 W m-2 K-1. The main effect was not the change of heat transfer coefficient but the shift of Leidenfrost temperature to a lower temperature area. The change of water temperature from 20 C to 80 C caused the change of Leidenfrost temperature about 130 C for both nozzles. This can be a significant change of cooling and can affect the cooling character in industrial applications.

Keywords

Heat transfer coefficient, Leidenfrost temperature, cooling intensity, hot rolling, continuous casting, water temperature, mist nozzle, flat fan nozzle

RIV year

2012

Released

16.05.2012

Publisher

TANGER LTD

Location

OSTRAVA

ISBN

978-80-87294-31-4

Book

21ST INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS (METAL 2012)

Edition

1st Edition 2012

Pages from

1

Pages to

6

Pages count

6

URL

BibTex


@inproceedings{BUT92787,
  author="Milan {Hnízdil} and Miroslav {Raudenský}",
  title="Influence of Water Temperature on the Cooling Intensity during Continuous Casting and Hot Rolling",
  annote="Two types of nozzles were tested to find out the influence of the water temperature on cooling intensity. The first type was a mist nozzle used in the secondary cooling area of a steel slab casting machine. The second type was a flat fan nozzle usually used during hot rolling and heat treatment process of rolled strips. These laboratory measurements of cooling intensity were performed in a temperature range of water temperature from 20 C to 80 C. A strong influence of the water temperature on cooling intensity was found. Changing the water temperature from 20 C to 80 C caused a change of heat transfer coefficient. For mist nozzle was found slightly increasing cooling intensity with growing water temperature. The difference was about 30 W m-2 K-1. For flat fan nozzle was found the decreasing cooling intensity with growing water temperature. The difference was about 110 W m-2 K-1. The main effect was not the change of heat transfer coefficient but the shift of Leidenfrost temperature to a lower temperature area. The change of water temperature from 20 C to 80 C caused the change of Leidenfrost temperature about 130 C for both nozzles. This can be a significant change of cooling and can affect the cooling character in industrial applications.",
  address="TANGER LTD",
  booktitle="21ST INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS (METAL 2012)",
  chapter="92787",
  edition="1st Edition 2012",
  howpublished="electronic, physical medium",
  institution="TANGER LTD",
  year="2012",
  month="may",
  pages="1--6",
  publisher="TANGER LTD",
  type="conference paper"
}