Publication detail

Controlled Cooling in Continuous Casting

HORSKÝ, J., KOTRBÁČEK, P.

Original Title

Controlled Cooling in Continuous Casting

English Title

Controlled Cooling in Continuous Casting

Type

journal article - other

Language

en

Original Abstract

Cooling is an essential part of the continuous casting technology. The new generation of mist nozzles allows controlling the cooling intensity in wide range by setting a combination of water and air pressures. The paper presents experimental method for measurement of heat transfer parameters of typically used water and water-air (mist) nozzles. The experimental apparatus uses the identical spray conditions to the conditions in plant. The nozzles are tested for pressure setting, for influence of casting speed, for behaviour in the overlapping areas. The tests provide the description of heat transfer coefficient and heat flux distribution on the cooled steel surface. The knowledge of these parameters is necessary for any advanced control system. Another area where the knowledge of cooling parameters is necessary is design of cooling sections for casting machine and preparation of cooling model for steel groups. The paper presents new experimental findings in specification of the Leidenfrost temperature that is sharp surface temperature border between high and low temperature regions where great difference in cooling intensity is observed. The paper also deals with the problems of homogeneity of cooling along the nozzle spray angle and in the overlapping area where thermal strips occur. Sensitivity of this problem to the pressure of coolant is discussed.

English abstract

Cooling is an essential part of the continuous casting technology. The new generation of mist nozzles allows controlling the cooling intensity in wide range by setting a combination of water and air pressures. The paper presents experimental method for measurement of heat transfer parameters of typically used water and water-air (mist) nozzles. The experimental apparatus uses the identical spray conditions to the conditions in plant. The nozzles are tested for pressure setting, for influence of casting speed, for behaviour in the overlapping areas. The tests provide the description of heat transfer coefficient and heat flux distribution on the cooled steel surface. The knowledge of these parameters is necessary for any advanced control system. Another area where the knowledge of cooling parameters is necessary is design of cooling sections for casting machine and preparation of cooling model for steel groups. The paper presents new experimental findings in specification of the Leidenfrost temperature that is sharp surface temperature border between high and low temperature regions where great difference in cooling intensity is observed. The paper also deals with the problems of homogeneity of cooling along the nozzle spray angle and in the overlapping area where thermal strips occur. Sensitivity of this problem to the pressure of coolant is discussed.

Keywords

Continuous casting Cooling…..Heat transfer…..Experimental method

RIV year

2004

Released

14.09.2004

Publisher

Chinese Society for Metals

Location

Peking

Pages from

342

Pages to

346

Pages count

5

BibTex


@article{BUT46459,
  author="Miroslav {Raudenský} and Jaroslav {Horský} and Petr {Kotrbáček}",
  title="Controlled Cooling in Continuous Casting",
  annote="Cooling is an essential part of the continuous casting technology. The new generation of mist nozzles allows controlling the cooling intensity in wide range by setting a combination of water and air pressures. The paper presents experimental method for measurement of heat transfer parameters of typically used water and water-air (mist) nozzles. The experimental apparatus uses the identical spray conditions to the conditions in plant. The nozzles are tested for pressure setting, for influence of casting speed, for behaviour in the overlapping areas. The tests provide the description of heat transfer coefficient and heat flux distribution on the cooled steel surface. The knowledge of these parameters is necessary for any advanced control system. 
Another area where the knowledge of cooling parameters is necessary is design of cooling sections for casting machine and preparation of cooling model for steel groups. The paper presents new experimental findings in specification of the Leidenfrost temperature that is sharp surface temperature border between high and low temperature regions where great difference in cooling intensity is observed. The paper also deals with the problems of homogeneity of cooling along the nozzle spray angle and in the overlapping area where thermal strips occur. Sensitivity of this problem to the pressure of coolant is discussed. 
",
  address="Chinese Society for Metals",
  booktitle="The Chinese Society for Metals",
  chapter="46459",
  edition="Supplement 2004",
  howpublished="print",
  institution="Chinese Society for Metals",
  journal="Chinese Society for Metals",
  number="2004",
  volume="39",
  year="2004",
  month="september",
  pages="342--346",
  publisher="Chinese Society for Metals",
  type="journal article - other"
}