Publication detail

Cooling homogeneity measurement during hydraulic descaling in spray overlapping area

VOTAVOVÁ, H. POHANKA, M. BULEJKO, P.

Original Title

Cooling homogeneity measurement during hydraulic descaling in spray overlapping area

English Title

Cooling homogeneity measurement during hydraulic descaling in spray overlapping area

Type

conference paper

Language

en

Original Abstract

Steel production is connected with high temperatures at which the steel reacts with oxygen in the surrounding atmosphere, creating scales on its surface. One of the most promising technologies for removing these scales when the steel is still very hot is hydraulic descaling. A row of high pressure flat jet water nozzles is usually used, with the feed pressure usually ranging between 10 and 40 MPa. The descaled material usually moves under the spraying nozzles. For most flat products, several nozzles arranged in a row must be used because the spray width of the nozzle is smaller than the width of the sprayed material. The steel surface where the scales are sprayed away by two adjacent nozzles is called the overlapping area. This area is dramatically overcooled during the typical configuration with an offset angle of 15° and an inclination angle of 15°. For this paper, both the typical and a new configuration with an offset angle of 0° were measured. Cooling homogeneity measurements were made to see the improvement in cooling homogeneity with the new configuration and spray impact pressure distribution measurements were made to see the size and shape of pressure distributions in the overlapping area for both configurations. Obtained results are presented and any improvement with the new configuration is discussed.

English abstract

Steel production is connected with high temperatures at which the steel reacts with oxygen in the surrounding atmosphere, creating scales on its surface. One of the most promising technologies for removing these scales when the steel is still very hot is hydraulic descaling. A row of high pressure flat jet water nozzles is usually used, with the feed pressure usually ranging between 10 and 40 MPa. The descaled material usually moves under the spraying nozzles. For most flat products, several nozzles arranged in a row must be used because the spray width of the nozzle is smaller than the width of the sprayed material. The steel surface where the scales are sprayed away by two adjacent nozzles is called the overlapping area. This area is dramatically overcooled during the typical configuration with an offset angle of 15° and an inclination angle of 15°. For this paper, both the typical and a new configuration with an offset angle of 0° were measured. Cooling homogeneity measurements were made to see the improvement in cooling homogeneity with the new configuration and spray impact pressure distribution measurements were made to see the size and shape of pressure distributions in the overlapping area for both configurations. Obtained results are presented and any improvement with the new configuration is discussed.

Keywords

steel, scales, hydraulic descaling, cooling, homogeneity

RIV year

2015

Released

03.06.2015

Publisher

Tanger Ltd Ostrava

Location

Ostrava

ISBN

978-80-87294-58-1

Book

METAL 2015 24th International Conference on Metallurgy and Materials

Edition

1

Edition number

1

Pages from

265

Pages to

270

Pages count

6

BibTex


@inproceedings{BUT114715,
  author="Helena {Votavová} and Michal {Pohanka} and Pavel {Bulejko}",
  title="Cooling homogeneity measurement during hydraulic descaling in spray overlapping area",
  annote="Steel production is connected with high temperatures at which the steel reacts with oxygen in the
surrounding atmosphere, creating scales on its surface. One of the most promising technologies for
removing these scales when the steel is still very hot is hydraulic descaling. A row of high pressure flat jet
water nozzles is usually used, with the feed pressure usually ranging between 10 and 40 MPa. The descaled
material usually moves under the spraying nozzles. For most flat products, several nozzles arranged in a row
must be used because the spray width of the nozzle is smaller than the width of the sprayed material. The
steel surface where the scales are sprayed away by two adjacent nozzles is called the overlapping area.
This area is dramatically overcooled during the typical configuration with an offset angle of 15° and an
inclination angle of 15°. For this paper, both the typical and a new configuration with an offset angle of 0°
were measured. Cooling homogeneity measurements were made to see the improvement in cooling
homogeneity with the new configuration and spray impact pressure distribution measurements were made to
see the size and shape of pressure distributions in the overlapping area for both configurations. Obtained
results are presented and any improvement with the new configuration is discussed.",
  address="Tanger Ltd Ostrava",
  booktitle="METAL 2015 24th International Conference on Metallurgy and Materials",
  chapter="114715",
  edition="1",
  howpublished="electronic, physical medium",
  institution="Tanger Ltd Ostrava",
  year="2015",
  month="june",
  pages="265--270",
  publisher="Tanger Ltd Ostrava",
  type="conference paper"
}