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Refractory Technology

Refractory Technology
Hot blast main (carrying air at 1000°C) in blast furnace are lined with __________ bricks.

Silica
Fireclay
Zirconia
Magnesite

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Refractory Technology
RUL of refractories depends on the

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

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Refractory Technology
Carbon refractories are exclusively used in the

Side wall of soaking pits
Regenerators of coke oven
Hearth of blast furnace
Walls of coke oven

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Refractory Technology
Semi-silica bricks compared to silica bricks have

Both A & B
Better spalling resistance
Neither A nor B
Less fusion point

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Refractory Technology
Capacity of a refractory brick to withstand-sudden changes in temperature is denoted by the property called

Refractoriness
Spalling resistance
Refractoriness under load (RUL)
None of these

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Refractory Technology
Pyrometric cone equivalent (PCE) value (Segar cone) of 'superduty refractories' is more than 33 which corresponds to a temperature of __________ °C.

1670
1730
1520
1630

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