Publication detail

A Numerical Investigation on the Electrochemical Behavior of CaO and Al2O3 in the ESR Slags

KARIMI-SIBAKI, E. KHARICHA, A. WU, M. LUDWIG, A. BOHÁČEK, J.

English title

A Numerical Investigation on the Electrochemical Behavior of CaO and Al2O3 in the ESR Slags

Type

journal article in Web of Science

Language

en

Original abstract

Field structures including electromagnetic, concentration of ions, and flow fields in an ESR-like process composed of a graphite crucible containing a molten slag, air, and an iron electrode are computed. Both CaF2-(mass pct 2) CaO and CaF2-(mass pct 2) Al2O3 slags are examined. Tertiary current distribution is calculated. Therefore, polarization overpotential and Faradic reactions at metal-slag interface are considered using Tafel law, whereas transport of ions in the bulk of slag is determined through Nernst-Planck equations. The main goal is to shed light on the invisible phenomena such as magnetohydrodynamics caused by transport of ions, electrical conductivity of CaF2-based slag using additives (e.g., CaO or Al2O3), and the role of complexation of ions (e.g., AlO33-) in the molten slag applied to the ESR. An explanation is given for the observation of higher oxygen content in the metal using Al2O3 than that using equivalent amount of CaO in the CaF2-based slag of a DC-operated ESR.

English abstract

Field structures including electromagnetic, concentration of ions, and flow fields in an ESR-like process composed of a graphite crucible containing a molten slag, air, and an iron electrode are computed. Both CaF2-(mass pct 2) CaO and CaF2-(mass pct 2) Al2O3 slags are examined. Tertiary current distribution is calculated. Therefore, polarization overpotential and Faradic reactions at metal-slag interface are considered using Tafel law, whereas transport of ions in the bulk of slag is determined through Nernst-Planck equations. The main goal is to shed light on the invisible phenomena such as magnetohydrodynamics caused by transport of ions, electrical conductivity of CaF2-based slag using additives (e.g., CaO or Al2O3), and the role of complexation of ions (e.g., AlO33-) in the molten slag applied to the ESR. An explanation is given for the observation of higher oxygen content in the metal using Al2O3 than that using equivalent amount of CaO in the CaF2-based slag of a DC-operated ESR.

Keywords in English

Additives;Alumina;Aluminum oxide;Calcium fluoride;Electrodes;Fluorspar;Ions;Magnetohydrodynamics;Current distribution;Electrical conductivity;Electrochemical behaviors;Field structures;Graphite crucibles;Iron electrodes;Numerical investigations;Planck equation

Released

01.06.2020

Publisher

Springer Nature

Location

NEW YORK

ISSN

1073-5615

Volume

51

Number

3

Pages from–to

871–879

Pages count

9

BIBTEX


@article{BUT164735,
  author="Ebrahim {Karimi-Sibaki} and Abdellah {Kharicha} and Menghuai {Wu} and Andreas {Ludwig} and Jan {Boháček},
  title="A Numerical Investigation on the Electrochemical Behavior of CaO and Al2O3 in the ESR Slags",
  year="2020",
  volume="51",
  number="3",
  month="June",
  pages="871--879",
  publisher="Springer Nature",
  address="NEW YORK",
  issn="1073-5615"
}