Refractory Technology
Zircon refractories have

All of these
High RUL (1600°C) and refractoriness (> 2000°C)
High spalling resistance
Low co-efficient of expansion

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Refractory Technology
Tar bonded dolomite bricks

Are used in outer lining of L.D. converters
All of these
Are stored under controlled temperature & humidity to avoid hydration
Have poorer hydration resistance than pitch bonded bricks

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