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HomeImprovement of productivity on hot dip galvanising line by decreasing strip vibrations in gas jets cooling systems (Stripvibrations reduction)
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The high quality standard of coated steels requires good stability of the strip, particularly in the cooling tower after the zinc bath, where the gas jets of the cooling equipment excite the strip. The objective of the pilot project is to increase the line productivity and coating quality by decreasing the vibrations along the cooling path, not with external stabilising actuators but by the improvement of existing cooling technologies. We applied a methodology mixing industrial trials, experiments on a semi-industrial facility and a theoretical approach. Despite the unforeseen withdrawal of the initial line due to financial difficulties in the European steel industry, we choose a new industrial line. Thus the major achievements are as follows. — Actual state of vibration amplitudes under industrial conditions and the effect of the major process parameters. — A model coupling physical and numerical approaches, able to predict the vibration amplitudes and frequencies for specific process parameters and configurations. — A new cooling technology that significantly reduces strip vibration amplitudes was designed and tested before being implemented on the chosen industrial line (revamping of existing cooling equipment). — The principles of those findings extended by the partner Drever to a new efficient cooling equipment dedicated to fast cooling sections (protective atmosphere). Many new lines are equipped with this innovative equipment. Acceptance tests show significant benefits. The project ended with success: the innovation has been implemented worldwide on many HDG lines. There are great benefits: strip stability, cooling efficiency and product quality. The results are shared with the community: six publications [1–4, 25–26] and two patents [27–28].
- Published:
- Corporate author(s): Directorate-General for Research and Innovation (European Commission)
- Personal author(s): Beaujard, K ; Renard, M ; Cano, A ; Willems, K
- Themes: Industrial research and development , Basic metals industry, steel industry
- Subject: iron and steel industry , iron and steel-working machinery , materials technology , research report , steel , strip , testing
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| ISSN 1831-9424 | ISBN 978-92-79-24828-3 | DOI 10.2777/92028 | Catalogue number KI-NA-25317-EN-N |
- Released on EU publications website:
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