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

Scheunis, L, Fallah-Mehrjardi, Ata, Campforts, M, Jones, P.T, Blanpain, B, Malfliet, A and Jak, E (2015) 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. Journal of the European Ceramic Society, 35 10: 2933-2942. doi:10.1016/j.jeurceramsoc.2015.03.028


Author Scheunis, L
Fallah-Mehrjardi, Ata
Campforts, M
Jones, P.T
Blanpain, B
Malfliet, A
Jak, E
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
Journal name Journal of the European Ceramic Society   Check publisher's open access policy
ISSN 0955-2219
1873-619X
Publication date 2015-09-01
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.jeurceramsoc.2015.03.028
Open Access Status
Volume 35
Issue 10
Start page 2933
End page 2942
Total pages 10
Place of publication London, United Kingdom
Publisher Elsevier Ltd
Collection year 2016
Language eng
Formatted 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.
Keyword Refractory wear
PbO slag
Temperature gradient
Forsterite formation
Slag infiltration
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2016 Collection
 
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