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Refractory Technology

Refractory Technology
Which is not an alumino-silicate refractory?

Fireclay bricks
High alumina bricks
Mullite bricks
Tar dolomite bricks

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Refractory Technology
Zircon refractories have

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

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Refractory Technology
With decrease in porosity, the __________ of the refractories decreases.

None of these
Thermal conductivity
Strength
Spalling resistance

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Refractory Technology
Refractory bricks having lower porosity have

Greater strength
High insulating properties
Low thermal conductivity
Low heat capacity

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Refractory Technology
__________ nozzles are used in continuous casting of steel,

Thoria
Zircon
Carborundum
Beryllia

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Refractory Technology
Roof of a basic open hearth furnace is lined with __________ bricks.

Fireclay
Silica
Magnesite
Dolomite

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