Development of a Dross Build-Up Growth Process Model for Hot-Dip Galvanizing Considering Surface Reaction Kinetics
Research output: Contribution to journal › Article › Research › peer-review
Authors
Organisational units
External Organisational units
- Materials Center Leoben Forschungs GmbH
- International Zinc Association
Abstract
The minimization of unwanted dross build-up formation on the sink rolls in continuous hot-dip
galvanizing lines is a key goal of the industry. In this study, the CFD multi-physics modeling of
the surface reaction kinetics for dross build-up growth and the coupling to the mass transfer is
the basis for the evaluation of relevant process parameters. The results of a virtual Design of
Experiments were processed by neural network approaches, as well as linear regression
modeling to build a surrogate process model. It was found that the bath Al concentration has
the highest effect (> 80 pct) on the dross build-up rate on the sink rolls. Operating the zinc bath
at higher Al concentrations decreases the dross build-up reaction rate. Furthermore, it was
found by the CFD multi-physics model that the local dross build-up rate increases toward the
edges of the roll grooves which might lead to the occurrence of strip surface defects.
galvanizing lines is a key goal of the industry. In this study, the CFD multi-physics modeling of
the surface reaction kinetics for dross build-up growth and the coupling to the mass transfer is
the basis for the evaluation of relevant process parameters. The results of a virtual Design of
Experiments were processed by neural network approaches, as well as linear regression
modeling to build a surrogate process model. It was found that the bath Al concentration has
the highest effect (> 80 pct) on the dross build-up rate on the sink rolls. Operating the zinc bath
at higher Al concentrations decreases the dross build-up reaction rate. Furthermore, it was
found by the CFD multi-physics model that the local dross build-up rate increases toward the
edges of the roll grooves which might lead to the occurrence of strip surface defects.
Details
Original language | English |
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Pages (from-to) | 53-63 |
Number of pages | 11 |
Journal | Metallurgical and materials transactions. B, Process metallurgy and materials processing science |
Volume | 55.2024 |
Issue number | February |
Early online date | 10 Nov 2023 |
DOIs | |
Publication status | Published - Feb 2024 |