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Preparation and characterization of Al2O3-SiC-C castables using ferrotitanium slag: structural commonalities between titanium–alumina slag and calcium alumino-titanate

Preparation and characterization of Al2O3-SiC-C castables using ferrotitanium slag: structural... To promote sustainable development in the refractory industry, ferrotitanium slags, including titanium–alumina slag (TAS) and calcium alumino–titanate (CAT), were used in this study to prepare Al2O3-SiC-C (ASC) castables. In this study, low-cost ASC castables were prepared using TAS and compared with those prepared using CAT in different atmospheres. The results show that metallic inclusions and Ti-concentrated areas in TAS aggregates lead to lower cold mechanical strength in TAS-based castables when fired in air. The performance of the TAS-based castables was similar to that of the CAT-based castables in low-oxygen environments. In the TAS aggregates, titanium suboxide showed local enrichment at the crystal boundary of Al2O3 in the form of Ti2O3. Both CAT and TAS showed the structural commonalities that aggregates were damaged along the boundary of the main crystal phase after heat treatment in an oxidizing atmosphere. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of the Australian Ceramic Society Springer Journals

Preparation and characterization of Al2O3-SiC-C castables using ferrotitanium slag: structural commonalities between titanium–alumina slag and calcium alumino-titanate

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Publisher
Springer Journals
Copyright
Copyright © The Author(s) under exclusive licence to Australian Ceramic Society 2022
ISSN
2510-1560
eISSN
2510-1579
DOI
10.1007/s41779-022-00742-1
Publisher site
See Article on Publisher Site

Abstract

To promote sustainable development in the refractory industry, ferrotitanium slags, including titanium–alumina slag (TAS) and calcium alumino–titanate (CAT), were used in this study to prepare Al2O3-SiC-C (ASC) castables. In this study, low-cost ASC castables were prepared using TAS and compared with those prepared using CAT in different atmospheres. The results show that metallic inclusions and Ti-concentrated areas in TAS aggregates lead to lower cold mechanical strength in TAS-based castables when fired in air. The performance of the TAS-based castables was similar to that of the CAT-based castables in low-oxygen environments. In the TAS aggregates, titanium suboxide showed local enrichment at the crystal boundary of Al2O3 in the form of Ti2O3. Both CAT and TAS showed the structural commonalities that aggregates were damaged along the boundary of the main crystal phase after heat treatment in an oxidizing atmosphere.

Journal

Journal of the Australian Ceramic Society – Springer Journals

Published: Apr 22, 2022

Keywords: Ferrotitanium slag; Physical properties and cold mechanical strength; Microstructure; Formation mechanism

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