Multiphase Modeling of the Fluidynamics of Bottom Argon Bubbling during Ladle Operations

Abstract

Fig. 13. Bubble plume structure; a) physical modeling and b) numerical simulation.

Modeling of Gas-Steel-Slag Three-Phase Flow in Ladle Metallurgy: Part II. Multi-scale Mathematical Model

“…Linmin LI, 1,2) Baokuan LI 1) * and Zhongqiu LIU 1) 1) School of Metallurgy, Northeastern University, Shenyang, 110819 China.…”

“…Currently, numbers of mathematical models have been proposed to investigate the flow characteristics and slag layer behaviors in the gas stirred ladle. In an Eulerian way, Li et al 1) and Llanos et al 2) adopted the volume of fluid (VOF) approach to describe the fluid dynamics of all phases in ladle. Numerous works such as Zhang, 3) Bellot et al, 4) Mukhopadhyay et al, 5) Luo and Zhu 6) and Li et al 7) used the Eulerian discrete fluid model with inter-phase interactions to simulate the bubble plume, and the population balance model (PBM) for calculation of non-uniform bubble size is also employed.…”

“…Thus, the collision volume in one time step is defined as π(r i + r j ) 2 (17) where n represents the number of collisions between a collector and other bubbles.…”

Numerical Study on Flow, Temperature, and Concentration Distribution Features of Combined Gas and Bottom-Electromagnetic Stirring in a Ladle

“…The mixing effect of AGS with a single central plug is not enough to eliminate the temperature and concentration stratification, and the dead zone easily emerges in the region of the ladle bottom far away from the plug, resulting in temperature and concentration stratification. Although there are a few reports aiming to improve the flow field and reduce the dead zone by changing the plug configurations, such as eccentric plug [10][11][12] and by…”

A Parametric Study on the Effects of Process Conditions on Dehydrogenation, Wall Shear and Slag Entrainment in the Vacuum Arc Degasser Using Mathematical Modelling

“…Central to ladle refining operations is vacuum degassing, a process through which the hydrogen and nitrogen content in steel is reduced via tank (vacuum arc degassing, VAD) or recirculating (RH degassing) methods operating under surface pressures close to 10 2 Pa. Mathematical modelling of the flow field in gas-stirred ladles have followed the finite volume computational fluid dynamics (CFD) approach based upon the volume of fluid (VOF) method, 1,2) Euler-Lagrange 3,4) and Eulerian 5,6) methods. The VOF method is an interface tracking technique in which a single set of equations are solved across all phases.…”