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Refractory Technology

Refractory Technology
Refractoriness under load (RUL) of fireclay bricks (under a load of 2 kg/cm² ) is __________ °C.

500
>2000
1000
>1350

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Refractory Technology
Which property is important for bricks used in the combustion chamber & dome of blast furnace stoves?

High resistance to spalling
High strength and density
High refractoriness
All of these

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Refractory Technology
Fireclay bricks is not used for lining the

Roof of open hearth furnace
Bottom of hot metal mixer
Cupola
Gas producer

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Refractory Technology
Refractoriness/fusion points of 'superduty' refractories is __________ °C.

1520-1630
1630-1670
> 2000
> 1730

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Refractory Technology
Slide gates in teeming laddie used for steel pouring in ingot moulds is lined with __________ bricks.

Semi-silica
Bakelite impregnated or fused periclase
Fireclay
Silica

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

1670
1730
1630
1520

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