Effects of Magnesium Aluminate Spinel on the Properties of Al₂O₃-SiC-C Castables for Blast Furnace Iron Trough

Abstract:

The effects of varying the additions of magnesium aluminate spinel (0, 3, 6, 9, 12 wt. %) on the physical properties and slag resistance of Al2O3-SiC-C based castables were investigated. The composition of the specimens was determined by X-Ray diffraction (XRD). The results revealed that the incorporation of appropriate amount of MgAl2O4 in Al2O3-SiC-C based castables could promote the sintering of the specimens, decrease apparent porosity, and improve bulk density and strength. The slag resistance of the castables was improved due to an increase in the viscosity of molten slag, caused by the solid solution of Fe2+ or Fe3+ ions from the molten slag in MgAl2O4. However, further addition would led to a decrease in slag resistance because much Mg2SiO4 was produced.

• Periodical: Advanced Materials Research (Volumes 476-478)
• Pages: 467-470
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.476-478.467
• Online since: February 2012
• Authors: Jun Cong Wei, Jian Kun Huang, Chun Hui Cao, Jun Bo Tu
• Keywords: Al₂O₃-SiC-C, MgAl₂O₄, Slag Resistance

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