Refractory Technology
High alumina refractory compared to fireclay bricks have

High resistance to thermal shock and creep
Less load bearing capacity
Low refractoriness
Less resistance to slag attack

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Refractory Technology
Quartz is

Transformed to crystoballite on heating above 1470°C
All of these
Converted to tridymite on firing between 870 to 1470°C
Stable form of silica upto 870°C

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