Dynamic Model of Slag Foaming in Oxygen Steelmaking Converters.

Abstract

The foaming and emulsification of steelmaking slags can be analyzed in terms of an emulsion number which is defined as the ratio of the velocity of gas bubbles and that of metai droplets present in slag at any

Cold Simulation of momentum transfer of a metal droplet falling through slag systems possessing net-work structured fluids

“…These correlations are derived using the Stokes law and therefore their applicability is limited only to the low Reynolds number regimes. Subagyo and Brooks (2002) improved the correlation developed by Deo et al (1996) and Mishra et al (1998) to cover a wide range of Reynolds numbers. They used a modified force balance equation in which the difference between the gravitational forces and the buoyant forces acting on the droplets/bubbles is equated to the forces associated with the kinetic behaviour of the fluid.…”

“…While Proudman and Pearson (1957) and Laslie and Tanner (1961) simulated the gas-metal-slag mixtures through on which the metal droplets descend in real systems, Deo et al (1996) and Mishra et al (1998) predicted the terminal velocity of the descending droplets using the correlations involving dimensionless numbers. These correlations are derived using the Stokes law and therefore their applicability is limited only to the low Reynolds number regimes.…”

Kinetics of Flux Dissolution in Oxygen Steelmaking

“…[35][36][37][38][39] However, all these equations give different values for height of the foamy slag for process conditions. For simplicity, in this study the height of foam is approximated by (15) where h f is the height of foamy slag (m), A is slag area (m 2 ), and j g is gas fraction in emulsion.…”

An Improved Correlation for Predicting Terminal Velocity of Droplets and Bubbles in Slag-Metal-Gas Emulsion.

“…Deo and co-workers 1,2) proposed a dimensionless number to characterize the behavior of slag-metal-gas emulsions. The dimensionless number is defined as, where N Em is emulsion number, t d and t b are the mean residence time of metal droplets and gas bubbles in emulsion, respectively.…”

“…Deo and co-workers 1,2) used the following Gal-Or and Waslo equation 3) for predicting the terminal velocity of metal droplets and gas bubbles. 3) hence, its applicability is limited only to the low value of the Reynolds number.…”