Detail publikace

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

Originální název

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

Anglický název

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

Jazyk

en

Originální abstrakt

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.

Anglický abstrakt

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.

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"
}