Method for inverse calculation of erosion parameters in slag-refractory systems

Publikation: Beitrag in FachzeitschriftArtikelForschungBegutachtung

Abstract

Refractory erosion due to fluid flow is caused by the shear stresses acting on the liquid/solid interface. This mechanism of continuous wear has not been extensively investigated based on appropriate physical considerations. This study proposes a novel method for the inverse calculation of erosion parameters in slag-refractory systems. A computational fluid dynamic model is coupled with optimisation software to solve a nonlinear least-squares problem for the identification of erosion parameters from experimental erosion profiles. Erosion-rate modelling is performed based on a three-parameter law of the acting shear stress. A test problem is studied using artificially generated erosion profiles. The feasibility of the approach with two parameters is proven; however, using three parameters causes the problem to become ill-posed. Moreover, the method is successfully applied to a real experiment with an alumina coarse-grain refractory. Statistical analysis of the solutions is performed for both the test problem and real experimental profile. Confidence intervals and regions calculated via linearisation are examined, but their use is limited and should be evaluated for each case. This method can serve as a basis for further investigations concerning the quantification of refractory erosion.
OriginalspracheEnglisch
Aufsatznummer104736
Seitenumfang10
FachzeitschriftMaterials Today Communications
Jahrgang33.2022
AusgabenummerDecember
Frühes Online-Datum21 Okt. 2022
DOIs
PublikationsstatusVeröffentlicht - Dez. 2022

Bibliographische Notiz

Funding Information:
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, we 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 Ceramics of the Montanuniversität Leoben and the industrial partners voelstalpine Stahl GmbH, RHI Magnesita GmbH and Böhler Edelstahl GmbH.

Publisher Copyright:
© 2022 The Authors

Schlagwörter

  • erosion, refractories, CFD simulation, optimization

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