University of Oulu

Ramasetti, Eshwar Kumar; Visuri, Ville-Valtteri; Sulasalmi, Petri; Fabritius, Timo (2019) A CFD and experimental investigation of slag eye in gas stirred ladle. In: Proceedings of the 5th International Conference on Fluid Flow, Heat and Mass Transfer (FFHMT'18), June 7 - 9, 2018, Niagara Falls, Canada, article nro 148, https://doi.org/10.11159/ffhmt18.148

A CFD and experimental investigation of slag eye in gas stirred ladle

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Author: Ramasetti, Eshwar Kumar1; Visuri, Ville-Valtteri1; Sulasalmi, Petri1;
Organizations: 1Process Metallurgy Research Unit, University of Oulu, PO Box 4300,90014 University of Oulu, Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.9 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2019112644289
Language: English
Published: International ASET, 2018
Publish Date: 2019-11-26
Description:

Abstract

In ladle metallurgy, gas stirring and behavior of the slag layer are very important for the quality of the steel. When gas is injected through a nozzle located at the bottom of the ladle into the metal bath, the gas jet exiting the nozzle breaks up into gas bubbles. The rising bubbles break the slag layer and create a slag eye. In this paper, the behavior of the slag eye area for different gas flow rates is been investigated through experimental measurements and CFD simulations. A 1/5-scale water model of 150 ton-ladle was deployed for the experimental measurements and for studying the effect of gas flow rate on the slag eye diameter. The physical modelling results show that the slag eye area changes from 20 to 182 cm2 when the gas flow rate increases from 1.5 to 15NL/min. The dimensionless area of the open eye was found to be in agreement with earlier studies. The simulations were carried out in the commercial CFD code ANSYS Fluent with mesh generation in ANSYS Workbench. The numerical model developed is based on the Eulerian Multiphase Volume of Fluid (VOF) approach and employs standard 𝑘−𝜀 turbulence model for solving the turbulent liquid flow induced by bubble-liquid interaction. The simulation results of slag eye area showed a good agreement when compared to experimental results measured.

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Series: Proceedings of the International Conference on Fluid Flow, Heat and Mass Transfer
ISSN: 2369-3029
ISSN-L: 2369-3029
ISBN: 978-1-927877-44-9
Article number: 148
DOI: 10.11159/ffhmt18.148
OADOI: https://oadoi.org/10.11159/ffhmt18.148
Host publication: International Conference on Fluid Flow, Heat and Mass Transfer, (FFHMT'18), June 7 - 9, 2018, Niagara Falls, Canada
Conference: International Conference on Fluid Flow, Heat and Mass Transfer, (FFHMT'18), June 7 - 9, 2018, Niagara Falls, Canada
Type of Publication: A4 Article in conference proceedings
Field of Science: 215 Chemical engineering
Subjects:
CFD
Funding: The authors are grateful for financial support from the European Commission under grant number 675715-MIMESIS - H2020-MSCA-ITN-2015 which is part of the Marie Sklodowska-Curie Actions Innovative Training Networks European Industrial Doctorate Programme. V.-V. Visuri thanks the Finnish Culture Foundation for his financial support.
EU Grant Number: (675715) MIMESIS - Mathematics and Materials Science for Steel Production and Manufacturing
Copyright information: © The Authors. Open access at: http://avestia.com/FFHMT2018_Proceedings/files/paper/FFHMT_148.pdf