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Refractory Technology

Refractory Technology
Carbon refractories have very high

Wetting characteristics
Refractoriness
Thermal conductivity
Both B and C

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Refractory Technology
High thermal conductivity of a refractory material is not important, when it is to be used in the

Blast furnace
Recuperators
Muffle furnace
Coke oven regenarators

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

Zirconia
Silica
Magnesite
Fireclay

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

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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
20 and 80
50 and 50
80 and 20

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Refractory Technology
Maximum shrinkage in volume occurring during burning/firing of dried refractories may be as high as __________ percent.

30
15
10
20

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