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Refractory Technology

Refractory Technology
Chemically, mullite refractories is

Al2O₃
ThO₂
3Al2O₃.2SiO₂
ZrSO₄

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Refractory Technology
In panel test for spalling resistance, the average face temperature of panel assembly is maintained at __________ °C for 24 hours.

1000
2000
700
1600

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Refractory Technology
Dolomite bricks have good resistance to attack by

Lime slag
Molten steel
Iron oxide
None of these

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Refractory Technology
Chromite refractories are

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

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Refractory Technology
RUL of refractories depends on the

All of these
Presence of impurities like iron & alkali
Chemical composition
Physical structure

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Refractory Technology
Most Cermets, which normally have high thermal conductivity and high thermal shock resistance, comprises of ceramic & metallic components of __________ percent respectively.

60 and 40
50 and 50
80 and 20
20 and 80

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