TY - JOUR

T1 - Numerical Treatment of Oxide Particle Dissolution in Multicomponent Slags with Local Gibbs Energy Minimization

AU - Ogris, Daniel Marian

AU - Gamsjäger, Ernst

N1 - Publisher Copyright: © 2022 The Authors. Steel Research International published by Wiley-VCH GmbH.

PY - 2022/4/19

Y1 - 2022/4/19

N2 - 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.

AB - 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.

KW - diffusion

KW - dissolution of oxide particles

KW - Gibbs energy minimization

KW - phase transformation

KW - slags

KW - steelmaking

UR - http://www.scopus.com/inward/record.url?scp=85128814104&partnerID=8YFLogxK

U2 - 10.1002/srin.202200056

DO - 10.1002/srin.202200056

M3 - Article

AN - SCOPUS:85128814104

VL - 93.2022

JO - Steel research international

JF - Steel research international

SN - 1611-3683

IS - 8

M1 - 2200056

ER -