Thermo-chemical Fluid Flow Simulation in Hot-Dip Galvanizing: The Evaluation of Dross Build-Up Formation
| Autor: | Werner Eßl, Gerhard Angeli, Johann Strutzenberger, Harald Unger, Anton Ishmurzin, Georg Reiss, Claudia Mugrauer, Werner Ecker |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Dross 0211 other engineering and technologies chemistry.chemical_element 02 engineering and technology Computational fluid dynamics 01 natural sciences Physics::Fluid Dynamics symbols.namesake Aluminium 0103 physical sciences Materials Chemistry Fluid dynamics Dissolution 021102 mining & metallurgy 010302 applied physics business.industry Turbulence Metals and Alloys Mechanics Condensed Matter Physics Galvanization Flow conditions chemistry Mechanics of Materials symbols business |
| Zdroj: | Metallurgical and Materials Transactions B. 50:834-845 |
| ISSN: | 1543-1916 1073-5615 |
| Popis: | This paper presents a new computational framework to investigate the driving force for the formation of intermetallic dross particles in the zinc bath and dross build-up on the bath hardware. This is a major problem in continuous hot-dip galvanizing lines. The Computational Fluid Dynamics (CFD) model calculates the turbulent thermo-chemical flow conditions within the liquid melt. A detailed modeling of the steel strip–liquid interface enhances this approach, by means of a conjugated heat transfer calculation and a spatially resolved, temperature- and concentration-dependent iron dissolution and aluminum uptake. The heart of the computational framework is a thermodynamic model, which assesses the driving force for the formation or dissolution of dross particles in the bath and dross build-up on stationary and rotating equipment. The simulation results are validated with temperature and species depth profile measurements. The applicability of the CFD model is shown by investigating the locally resolved aluminum uptake and iron dissolution at the steel-strip surface, and the multi-physics conditions in the region near the roll. The novel approach of evaluating the thermodynamic driving force enables the assessment of the formation of dross build-up at the roll surface. |
| Databáze: | OpenAIRE |
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