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Refractory Technology

Refractory Technology
Refractoriness of a typical silica brick corresponds to Segar cone number, '32', which is equivalent to a temperature of __________ °C.

1520
1710
1380
1915

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Refractory Technology
Which property of refractories is the most important for top section of the blast furnace?

Resistance to slag peneration
Resistance to corrosion by slag
Resistance to abrasion
Stability of volume at high temperature

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Refractory Technology
Refractory bricks having lower porosity have

Low heat capacity
High insulating properties
Low thermal conductivity
Greater strength

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Refractory Technology
Which is not an acidic refractory?

Fireclay
Carbon black
High alumina refractory
Silica

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Refractory Technology
__________ of carbon blocks in the hearth of blast furnace helps in avoiding skull formation, when it becomes cold.

High thermal conductivity
Low porosity
High density
Non-wetting characteristics

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

>2000
>1350
1000
500

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