Mathematical modelling of slag–metal reactions and desulphurization behaviour in gas-stirred ladle based on the DPM-VOF coupled model. (13th September 2020)

• Record Type: Journal Article
• Authors: Cao, Qing; Nastac, Laurentiu
• Is Part Of: Ironmaking & steelmaking. Volume 47:Number 8(2020)
• Page Start: 873
• Page End: 881
• Publication Date: 2020-09-13
• Subjects: CFD modelling -- ladle metallurgy -- desulphurization -- slag–metal reaction -- fluid flow -- gas stirring -- phase interface -- coupled model; Iron industry and trade -- Periodicals; Steel industry and trade -- Periodicals; 669.1
• DOI: 10.1080/03019233.2019.1629155
• Languages: English
• ISSNs: 0301-9233

Abstract

ABSTRACT: A 3D transient CFD–reaction coupled model is developed to predict the slag–metal reaction and desulphurization kinetics in ladle furnace with both molten slag and air layers considered. The coupled model is able to predict the circulating flow field, capture the transient fluctuation characteristics of slag–air and steel–slag phase interfaces as well as the reaction area. Results also indicate that the distribution and evolution of the steel composition under gas stirring is predicted well. The influence of the chemical compositions of molten steel and slag on sulphur removal efficiency is studied. It is displayed that the Al addition into liquid steel or CaO addition into slag would increase the sulphur distribution ratio, resulting in the improvement of desulphurization efficiency.