Publication detail

Latest development of hydraulic descaling nozzles

RAUDENSKÝ, M. POHANKA, M. VOTAVOVÁ, H. ŘÍHA, Z. ZELEŇÁK, M.

Original Title

Latest development of hydraulic descaling nozzles

Type

article in a collection out of WoS and Scopus

Language

English

Original Abstract

The vast majority of steel production is processed by hot rolling nowadays. The steel is heated to high tem-peratures during the process and a crust of iron oxides (scales) is formed on the surface. This crust must be re-moved prior the rolling. The removal takes place in descalers, a row of high pressure flat jet nozzles, where the jets create a water knife that break the crust and washes the scales away. Heat transfer and fluid flow laboratory in cooperation with Institute of Geonics has been developing a nozzle with a pulsating jet that would increase the mechanical (water hammer) effect on the crust of the scales. So far a new fourth generation of hydrodynamic nozzle was developed. The nozzle generates an oscillating solid jet from side to side while maintaining the flatness of the jet. The mechanism of the oscillation is caused by the internal structure of the nozzle without any moving mechanical parts. The efficiency of the hydrodynamic nozzle is studied by the impact pressure measurements and erosion measurements. Comparison is made with conventional descaling nozzle with similar operating parameters.

Keywords

Spray, descaling, flat jet nozzle, water hammer effect, hydrodynamic nozzle, pressure impact, erosion

Authors

RAUDENSKÝ, M.; POHANKA, M.; VOTAVOVÁ, H.; ŘÍHA, Z.; ZELEŇÁK, M.

Released

24. 7. 2018

Location

Chicago

Pages from

1

Pages to

5

Pages count

5

BibTex

@inproceedings{BUT151610,
  author="RAUDENSKÝ, M. and POHANKA, M. and VOTAVOVÁ, H. and ŘÍHA, Z. and ZELEŇÁK, M.",
  title="Latest development of hydraulic descaling nozzles",
  year="2018",
  pages="1--5",
  address="Chicago"
}