Inclusion removal by bubble flotation in a continuous casting mold
TLDR
In this article, the attachment probability of inclusions on a bubble surface is investigated based on fundamental fluid flow simulations, incorporating the turbulent inclusion trajectory and sliding time of each individual inclusion along the bubble surface as a function of particle and bubble size.Abstract:
Fundamentally based computational models are developed and applied to quantify the removal of inclusions by bubbles during the continuous casting of steel. First, the attachment probability of inclusions on a bubble surface is investigated based on fundamental fluid flow simulations, incorporating the turbulent inclusion trajectory and sliding time of each individual inclusion along the bubble surface as a function of particle and bubble size. Then, the turbulent fluid flow in a typical continuous casting mold, trajectories of bubbles, and their path length in the mold are calculated. The change in inclusion distribution due to removal by bubble transport in the mold is calculated based on the computed attachment probability of inclusions on each bubble and the computed path length of the bubbles. In addition to quantifying inclusion removal for many different cases, the results are important to evaluate the significance of different inclusion-removal mechanisms. The modeling approach presented here is a powerful tool for investigating multiscale phenomena in steelmaking and casting operations to learn how to optimize conditions to lower defects.read more
Citations
More filters
Journal ArticleDOI
Review on Modeling and Simulation of Continuous Casting
TL;DR: A review of state-of-the-art models for continuous casting can be found in this paper, where the authors focus on practical applications to the formation of defects in continuous casting.
Journal ArticleDOI
Flow Transport and Inclusion Motion in Steel Continuous-Casting Mold under Submerged Entry Nozzle Clogging Condition
TL;DR: In this article, the authors investigated the fluid flow-related phenomena in the continuous casting mold region with the SEN clogging, including quantitative evaluation of inclusion removal, slag entrainment, heat transfer, and the prediction of breakouts.
Journal ArticleDOI
Transport and Entrapment of Particles in Steel Continuous Casting
TL;DR: In this article, a particle-capture model based on local force balances has been developed, implemented into computational models of turbulent fluid flow and particle transport, and applied to simulate the entrapment of slag inclusions and bubbles during the continuous casting of steel slabs.
Journal ArticleDOI
Fluid Flow-Related Transport Phenomena in Steel Slab Continuous Casting Strands under Electromagnetic Brake
Yufeng Wang,Lifeng Zhang +1 more
TL;DR: In this article, a 3D numerical model was built to investigate the effect of a local-type electromagnetic brake (EMBr) on the fluid flow, heat transfer, and inclusion motion in slab continuous casting strands.
Journal ArticleDOI
Nucleation, Growth, Transport, and Entrapment of Inclusions During Steel Casting
TL;DR: The nucleation, growth, transport, and entrapment of nonmetallic inclusions during the steel casting process are briefly reviewed in this article, where the current main research accomplishments as well as future topics that should be focused on in this field are summarized.
References
More filters
Journal ArticleDOI
I and i
TL;DR: There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.
Journal Article
Bubbles, Drops, and Particles
TL;DR: In this paper, the authors evaluated the applicability of the standard κ-ϵ equations and other turbulence models with respect to their applicability in swirling, recirculating flows.
Journal ArticleDOI
State of the Art in Evaluation and Control of Steel Cleanliness
Lifeng Zhang,Brian G. Thomas +1 more
TL;DR: A review of the current state-of-the-art in the evaluation of steel cleanliness can be found in this paper, where a wide range of important operating conditions throughout the steelmaking and casting processes are discussed.
Journal ArticleDOI
Shape of liquid drops moving in liquid media
TL;DR: In this paper, the effects of various physical properties, drop size, and drop velocity on drop shape was carried out for nonoscillating liquid drops falling through stationary liquid continuous phases, and simple empirical relations involving the Weber number, Eotvos number, and viscosity ratio were obtained which enable the prediction of the eccentricity of nonoscilling liquid drops over a wide range of Reynolds numbers with average deviations of 6 to 8%.
Journal ArticleDOI
Mathematical Modeling of Fluid Flow in Continuous Casting
Brian G. Thomas,Lifeng Zhang +1 more
TL;DR: In this article, a review of recent developments in modeling phenomena related to fluid flow in the continuous casting mold region, and the resulting implications for improving the process is presented, including the transport of bubbles and inclusion particles, multi-phase flow phenomena, the effect of electromagnetic forces, heat transfer, interfacial phenomena and interactions between the steel surface and the slag layers.
Related Papers (5)
Fundamentals of inclusion removal from liquid steel by bubble flotation
Lifeng Zhang,S. Taniguchi +1 more