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BF slag resistance of beta-Si3Al3O3N5 material derived from Al salt cake
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
2015 (English)In: Journal of the European Ceramic Society, ISSN 0955-2219, Vol. 35, no 4, 1307-1315 p.Article in journal (Refereed) Published
Abstract [en]

In the process of recycling of salt cake from secondary aluminium smelting, it was shown that a significant value addition can be made as beta-Si3Al3O3N5 could be successfully synthesized from the rest product after water-leaching by silicothermal reduction method. In order to evaluate its refractory application, the corrosion behavior in blast furnace slag was investigated under static condition at 1400-1480 degrees C in the present work. The results show that the beta-Si3Al3O3N5 material has good slag resistance. The apparent activation energy obtained for corrosion process is -388.7 kJ/mol, revealing a more complicated dissolution mechanism. The corrosion process is started with the dissolution of intergranular phase including the iron silicides and glassy phases in the specimens, which is aided by the softening at high temperature and the continuous attack from slag, then followed by the dissolution of beta-Si3Al3O3N5 grains in the slag.

Place, publisher, year, edition, pages
2015. Vol. 35, no 4, 1307-1315 p.
Keyword [en]
Salt cake, Slag resistance, beta-SiAlON, Silicothermal, Dissolution
National Category
URN: urn:nbn:se:kth:diva-160731DOI: 10.1016/j.jeurceramsoc.2014.11.002ISI: 000348084300018ScopusID: 2-s2.0-84920546268OAI: diva2:792114

QC 20150303

Available from: 2015-03-03 Created: 2015-02-27 Last updated: 2015-03-03Bibliographically approved

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Seetharaman, Seshadri
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