Thermo-chemical Fluid Flow Simulation in Hot-Dip Galvanizing: The Evaluation of Dross Build-Up Formation

Journal Article · Mon Apr 15 04:00:00 EDT 2019 · Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science

DOI:https://doi.org/10.1007/S11663-018-1496-0· OSTI ID:22933666

Reiss, Georg; Ishmurzin, Anton; Mugrauer, Claudia; Eßl, Werner; Ecker, Werner ^[1]; Strutzenberger, Johann; Unger, Harald; Angeli, Gerhard ^[2]

---

1. Materials Center Leoben Forschung GmbH (Austria)
2. voestalpine Stahl GmbH (Austria)

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.

• OSTI ID: 22933666
• Journal Information: Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science, Journal Name: Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science Journal Issue: 2 Vol. 50; ISSN 1073-5615; ISSN MTBSEO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
ALUMINIUM
COMPUTERIZED SIMULATION
CONCENTRATION RATIO
DISSOLUTION
FLUID FLOW
FLUID MECHANICS
HEAT TRANSFER
INTERMETALLIC COMPOUNDS
IRON
LIQUIDS
STEELS
SURFACES
THERMODYNAMIC MODEL
ZINC