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

Daniel Marian Ogris, Ernst Gamsjäger

Publikation: Beitrag in FachzeitschriftArtikelForschungBegutachtung

Abstract

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.
OriginalspracheEnglisch
Aufsatznummer2200056
Seitenumfang11
FachzeitschriftSteel research international
Jahrgang93.2022
Ausgabenummer8
DOIs
PublikationsstatusElektronische Veröffentlichung vor Drucklegung. - 19 Apr. 2022

Bibliographische Notiz

Funding Information:
The authors would like to thank Susanne Michelic for providing the original data regarding experimental silica dissolution tests used in this work. Furthermore, the authors would like to express their gratitude to Jiří Svoboda for his meaningful suggestions regarding the numerical treatment of diffusion‐driven dissolution processes. The authors gratefully acknowledge the funding support of K1‐MET GmbH, metallurgical competence center. The research programme of the K1‐MET competence center is supported by COMET (Competence Center for Excellent Technologies), the Austrian programme for competence centers. COMET is funded by the Federal Ministry for Climate Action, Environment, Energy, Mobility, Innovation, and Technology, the Federal Ministry for Digital and Economic Affairs, the Federal States of Upper Austria, Tyrol and Styria as well as the Styrian Business Promotion Agency (SFG) and the Standortagentur Tyrol. Furthermore, the authors thank Upper Austrian Research GmbH for the continuous support. In addition to the public funding from COMET, this research project is partially financed by the scientific partners the Chair of Metallurgy and the Institute of Mechanics of the Montanuniversität Leoben and the industrial partners Primetals Technologies Austria GmbH, RHI Magnesita GmbH, voestalpine Stahl GmbH, and voestalpine Stahl Donawitz GmbH.

Funding Information:
The authors would like to thank Susanne Michelic for providing the original data regarding experimental silica dissolution tests used in this work. Furthermore, the authors would like to express their gratitude to Jiří Svoboda for his meaningful suggestions regarding the numerical treatment of diffusion-driven dissolution processes. The authors gratefully acknowledge the funding support of K1-MET GmbH, metallurgical competence center. The research programme of the K1-MET competence center is supported by COMET (Competence Center for Excellent Technologies), the Austrian programme for competence centers. COMET is funded by the Federal Ministry for Climate Action, Environment, Energy, Mobility, Innovation, and Technology, the Federal Ministry for Digital and Economic Affairs, the Federal States of Upper Austria, Tyrol and Styria as well as the Styrian Business Promotion Agency (SFG) and the Standortagentur Tyrol. Furthermore, the authors thank Upper Austrian Research GmbH for the continuous support. In addition to the public funding from COMET, this research project is partially financed by the scientific partners the Chair of Metallurgy and the Institute of Mechanics of the Montanuniversität Leoben and the industrial partners Primetals Technologies Austria GmbH, RHI Magnesita GmbH, voestalpine Stahl GmbH, and voestalpine Stahl Donawitz GmbH.

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

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