Title: The effect of a temperature gradient on the phase formation inside a magnesia-chromite refractory in contact with a non-ferrous PbO-SiO2-MgO slag
Authors: Scheunis, Lennart ×
Fallah-Mehrjardi, A.
Campforts, Mieke
Jones, Peter Tom
Blanpain, Bart
Malfliet, Annelies
Jak, E #
Issue Date: 2015
Publisher: Elsevier Science Publishers
Series Title: Journal of the European Ceramic Society vol:35 pages:2933-2942
Abstract: Furnace relinings represent a major operating cost in pyrometallurgy. External cooling is, therefore, often used to reduce the chemical wear by limiting the slag infiltration depth, reducing the reaction kinetics and lowering the solubility of refractory components into the liquid slag. In this paper a new experimental setup is used to study the reaction between a synthetic PbO–SiO2 based slag and a magnesia–chromite refractory under a temperature gradient. Forsterite (Mg2SiO4) is formed throughout the sample, removing SiO2 from the infiltrated liquid slag. The resulting change in slag composition causes the liquidus temperature and the viscosity of the liquid to decrease partially countering the effect of the applied temperature gradient and resulting in the complete infiltration of the sample. The extent to which external cooling prolongs the lifetime of an industrial furnace thus depends on the slag properties and how they are modified after reaction with the refractory.
ISSN: 0955-2219
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Sustainable Metals Processing and Recycling
× corresponding author
# (joint) last author

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