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Refractory Technology

Refractory Technology
__________ bricks should not be used in oxidising atmosphere.

Tar dolomite
Silica
Fireclay
Carbon

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Refractory Technology
Refractoriness under load (RUL) is the most important property for the refractory bricks

At the hearth bottom of the furnace on which stock is placed
Used for furnace insulation
None of these
Used in the roof of the furnace

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Refractory Technology
Chromite refractories are

Fired at a temperature of 600°C only
Neutral refractory
Acidic refractory
Basic refractory

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Refractory Technology
Which of the following impurities reduces the refractoriness of magnesite bricks?

Al2O₃
CaO
SiO₂
All of these

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Refractory Technology
Carbon bricks are not used in the lining of the

Combustion chamber of blast furnace stoves
Highly chemical resistant equipments
Electric furnaces
Blast furnace hearth

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Refractory Technology
The maximum linear expansion of silica bricks during firing is about __________ percent.

0.5
3.5
1
2

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