EWRCOOL, effective work roll cooling
The EWRCOOL project has improved knowledge of roll cooling systems used on long product roiling mills and transferred knowledge from flat product rolling mills. The design of roll cooling for long product mills has been progressed by improved understanding of the performance of spray nozzles and the application of new technologies. Finite element models have been developed that represent the geometry of profiled rolls better than simplified models. FE models have enabled comparisons between different cooling configurations to be undertaken and modifications to be tested on production mills with confidence that the cooling provided will increase work roll life. The capability of modelling stress distributions induced into work rolls by the heating and cooling cycle imposed by production, leading to the modelling of crack initiation and propagation has been demonstrated. This capability has been used to provide comparisons between different roll cooling designs, thereby designing better systems for long product mills. Investigations of the effects of using mill water containing typical pollutants, have demonstrated that oil-based lubricants will reduce the heat transfer coefficient arising from spray cooling systems in relation to the concentration of the pollutant. Chemical salts were found to have little direct influence upon the HTC achieved but would be expected to affect the performance over longer durations, owing to deposition of the mineral content onto the nozzles. Roll wear patterns have been measured but were not necessarily consistent with the wear expected. Guiding of the product into the roll bite was noted to cause asymmetric roll wear.
Bibliographic Reference: EUR 23866 EN (2009), 204 pp. Euro: 25
Availability: http://bookshop.europa.eu/is-bin/INTERSHOP.enfinity/WFS/EU-Bookshop-Site/en_GB/-/EUR/ViewPublication-Start?PublicationKey=KINA23866 (Catalogue Number: KI-NA-23866-EN-S)
ISBN: ISBN: 978-92-79-11511-0
Record Number: 200910476 / Last updated on: 2009-10-12
Original language: en
Available languages: en