Surface Treatment of AZS Refractories Using High-Density Infrared Heating

摘要

It was demonstrated that zirconia-rich coatings can be formed on the surfaces of AZS refractories using HDI thermal treatments. During high-temperature processing, the surfaces are melted and mixing occurs between the applied zirconia coating and the underlying refractory. The coatings are characterized by fine dendritic ZrO_2 grains and some porosity. Corrosion testing in a container glass-NaCO_3 mixture at 1400 deg C showed that the coatings help form boundary layers on the surfaces.