Numerical Treatment of Oxide Particle Dissolution in Multicomponent Slags with Local Gibbs Energy Minimization

Daniel Marian Ogris, Ernst Gamsjäger

Research output: Contribution to journalArticleResearchpeer-review


Herein, a diffusion model for the dissolution of oxide particles in multicomponent slag systems is developed. It is assumed in this model that a sharp-interface separates the solid particle from the liquid slag. Minimization of the Gibbs energy provides the conditions at the interface. The differential equations for multicomponent diffusion in the liquid slag are solved numerically via a finite-difference scheme. It is indicated via parameter studies that the diffusion controlled dissolution kinetics may result in strongly different dissolution profiles depending on the initial conditions. It is demonstrated that the rate-controlling dissipative process is the diffusion of components for cases where earlier investigations claimed that a coupled diffusion-reaction process is in charge of the dissolution kinetics. Eventually, the numerical results are compared to data obtained from high-temperature laser scanning confocal microscopy (HT-LSCM) experiments.
Original languageEnglish
Article number2200056
Number of pages11
JournalSteel research international
Issue number8
Publication statusE-pub ahead of print - 19 Apr 2022

Bibliographical note

Publisher Copyright: © 2022 The Authors. Steel Research International published by Wiley-VCH GmbH.


  • diffusion
  • dissolution of oxide particles
  • Gibbs energy minimization
  • phase transformation
  • slags
  • steelmaking

Cite this