REFRACTORY PROPERTIES AND CORROSION RESISTANCE OF FORSTERITE-SPINEL CERAMICS WITH UTILIZATION OF FLY ASH
DOI:
https://doi.org/10.51704/cjce.2021.vol7.iss01.pp35-43Keywords:
Forsterite, spinel, fly ash, refractoriness, corrosion resistanceAbstract
This article examines the process for the synthesis of forsterite–spinel refractory ceramics with utilization of fly ash and reactive alumina as sources of aluminium oxide. Raw materials were milled, mixed in different ratios and sintered at 1500 °C for 2 h. Sintered samples were characterized by XRD and SEM. Porosity, water absorption, bulk density, refractoriness, refractoriness under load, thermal shock resistance and corrosion resistance to the effects of molten iron were also investigated. The resulting properties were then compared depending on the source of aluminium oxide. Presence of spinel in fired samples led to improved microstructural and mechanical properties, thermal shock resistance and corrosion resistance. In particular, mixtures with 10–20 % of spinel had the most promising results.
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