Numerical modelling of the transport and removal of inclusions in an industrial gas-stirred ladle. (26th November 2018)

• Record Type: Journal Article
• Authors: Cao, Qing; Nastac, Laurentiu
• Is Part Of: Ironmaking & steelmaking. Volume 45:Number 10(2018)
• Page Start: 984
• Page End: 991
• Publication Date: 2018-11-26
• Subjects: CFD modelling -- ladle metallurgical furnace -- argon gas stirring -- slag eye -- inclusion transport and removal; Iron industry and trade -- Periodicals; Steel industry and trade -- Periodicals; 669.1
• DOI: 10.1080/03019233.2018.1426697
• Languages: English
• ISSNs: 0301-9233

Abstract

ABSTRACT: A full-scale, three-dimensional, transient CFD modelling approach capable of predicting the three-phase fluid flow characteristics and the inclusion removal in a gas-stirred ladle was developed. The comparison with experimental data indicates that this model can accurately predict the multiphase fluid flow and slag eye behaviour. The transport and removal of the inclusions in the gas-stirred ladle were predicted by tracing the movement of individual inclusions through computing their particle trajectories and considering a fluctuant top slag layer. The effects of inclusion size, gas flow rates, and injected bubble diameters as well as various removal mechanisms including slag capture, bubble attachment, and ladle wall adhesion on the removal of inclusions were investigated. It is shown that the slag capture is the prevailing mechanism for inclusion removal and the gas flow rate is the most important parameter for enhancing the inclusion removal efficiency.