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Title: Chemical corrosion mechanisms of magnesia-chromite and chrome-free refractory bricks by copper metal and anode slag
Authors: Petkov, Veselin ×
Jones, Peter Tom
Boydens, Eddy
Blanpain, Bart
Wollants, Patrick #
Issue Date: 2007
Publisher: Elsevier sci ltd
Series Title: Journal of the european ceramic society vol:27 issue:6 pages:2433-2444
Abstract: The penetration and corrosion resistance to copper and anode slag of six magnesia-chromite and six chrome-free refractory brick types were tested using static finger tests at a typical copper-refining temperature ( 1300 degrees C). The microstructures of the as-delivered and tested refractory types were investigated by means of electron-probe micro-analysis (EPMA) and scanning electron microscopy (SEM) techniques. The results showed that the overall wear rate of the fingers was very low, with the exception of the alumina-based brick made of fused corundum and magnesia-alumina spinel. and the magnesia-based brick made of sintered magnesia and zircon addition. In all refractory types new phases were formed as a result of slag-refractory interactions. Apart from the samples recovered from the copper zone of the latest generation of direct-bonded magnesia-chromite bricks, all the rest were completely infiltrated by copper and slag components (copper oxide, iron oxide, alumina and silica). However, the amount of infiltrated liquid in the chrome-free types was higher than in the magnesia-chromite bricks. Explanations are provided for the distinct infiltration behaviour. The results show that economically viable chrome-free refractory alternatives are still elusive for anode furnace linings. (c) 2006 Elsevier Ltd. All rights reserved.
URI: 
ISSN: 0955-2219
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Chemical and Extractive Metallurgy Section (-)
Department of Materials Engineering - miscellaneous
× corresponding author
# (joint) last author

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