Numerical and physical modelling of tundish slag entrainment in the steelmaking process
Date
2017-05
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
The Southern African Institute of Mining and Metallurgy
Abstract
ENGLISH ABSTRACT: Physical and numerical modelling methods were followed to identify
mechanism(s) for tundish slag entrainment in a bare tundish and one with
a flow control device (FCD).
The physical and numerical models made use of water and paraffin to
model steel and slag respectively. Observations from the physical model
showed that the steel-slag interface remains immobile in both cases.
Entrained paraffin formed droplets approximately 1 mm in diameter.
Results from both models (numerical and physical) showed that in both
cases (bare and FCD case), areas of high entrained slag concentration exist
near the inlet region. The entrained slag concentration decreases towards
the tundish endwalls.
Flow patterns and velocities tangential to the steel-slag interface from
the numerical model showed that slag entrainment in both the bare
tundish and tundish with a FCD possibly takes place via two mechanisms.
First, the slag moves across the steel-slag interface via mass transfer;
secondly small velocities tangential to the interface at depths greater than
10 mm below the interface carry the already ‘entrained’ slag into the bulk
steel phase. These tangential flow patterns are dominant in the inlet
region, hence the high concentration of entrained slag in this region.
Description
CITATION: Mabentsela, A., Akdogan, G. & Bradshaw, S. 2017. Numerical and physical modelling of tundish slag entrainment in the steelmaking process. Journal of the Southern African Institute of Mining and Metallurgy, 117(5):469-483, doi:10.17159/2411-9717/2017/v117n5a9.
The original publication is available at http://www.saimm.co.za
The original publication is available at http://www.saimm.co.za
Keywords
Tundish slag entrainment, Iron slag, Steel forgings -- Welding
Citation
Mabentsela, A., Akdogan, G. & Bradshaw, S. 2017. Numerical and physical modelling of tundish slag entrainment in the steelmaking process. Journal of the Southern African Institute of Mining and Metallurgy, 117(5):469-483, doi:10.17159/2411-9717/2017/v117n5a9