A Simple Mathematical Model for Estimating Plume Hydrodynamics of Metallurgical Ladles
نویسندگان
چکیده
In secondary steelmaking, the refining operation is typically carried out in a metallurgical ladle that is commonly furnished with gas injection facilities. Since gas injection plays an intrinsic role in determining the efficiency of secondary steelmaking and thus the quality of final products, a great volume of work has been conducted mostly utilizing air-water systems at room temperature. Despite a portion of the air-water correlations have been adopted in the literature, their applicability to the real argon-metal system is still questionable. The main motivation behind this paper is to present a simple mathematical model for plume hydrodynamics of metallurgical ladles based on the characteristic phenomena and underlying mechanisms of a buoyant plume, where bubble breakup and coalescence occur simultaneously. The main assumptions/simplifications and governing equations are firstly introduced. After that, the accuracy of the model is demonstrated by comparing predicted plume velocities with the ones measured in an industrial ladle.
منابع مشابه
ISIJ International, Vol. 46 (2006), No. 11, pp. 1731–1733
Fluid mixing assumes an important role in various processing industries, in which the chemical efficiencies of typical processing operations carried out are intrinsically related to their hydrodynamic performance. In order to achieve high product qualities in steelmaking, submerged gas injection in ladles has now become a widely accepted industrial practice in almost every steelmaking shop. The...
متن کاملApplication of Computational Fluid Dynamics to Steel Refining and Casting Processes
The transport of fluid, heat ,and particles (bubbles and solid inclusions) in flowing molten steel is investigated in steel refining ladles, the continuous casting tundish, continuous casting mold and strand, and steel ingot casting processes. The two-equation k-ε model is used to simulate the turbulence. Multiphase fluid flow is numerically simulated with a Lagrangian-Eulerian approach, an Eul...
متن کامل0 COMPUTATIONS AND EXPERIMENTS OF i SHALLOW DEPTH EXPLOSION PLUMES
A mathematical model and computational code are validated for predicting shallow depth explosion plume behavior. The model is based on a generalized formulation of hydrodynamics and uses an incompressible liquid assumption. This formulation is well suited for predicting longtime bubble and plume dynamics. Initial conditions for the model are derived from spherically symmetric bubble theory, com...
متن کاملInfluence of mass transfer on bubble plume hydrodynamics.
This paper presents an integral model to evaluate the impact of gas transfer on the hydrodynamics of bubble plumes. The model is based on the Gaussian type self-similarity and functional relationships for the entrainment coefficient and factor of momentum amplification due to turbulence. The impact of mass transfer on bubble plume hydrodynamics is investigated considering different bubble sizes...
متن کاملApplication of New Inflection Point Method for Hydrodynamics Study in Slurry Bubble Column Reactors
Bubble column reactors are used in a wide variety of applications such as multiphase bioreactors, catalytic slurry reactors, and absorption processes. The superficial gas velocity-gas holdup relationship and transition point are two important parameters for characterizing the hydrodynamics of a bubble column reactor. In this study, systematic investigation of a nitrogen - water - glass bead...
متن کامل