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Refractory Technology

Refractory Technology
Rotary kilns meant for calcination of limestone are lined with chrome magnesite in __________ zone.

Cooling
Burning
Preheating
All of these

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Refractory Technology
High porosity refractory bricks have

Better thermal spalling resistance
All of these
Poor heat conductivity & low strength
Poor resistance to the peneration of molten slag, metal & flue gases

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

Coke oven regenarators
Blast furnace
Recuperators
Muffle furnace

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Refractory Technology
Electrical resistor bars are made of

Zirconia
Silicon carbide
Alumina
Graphite

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Refractory Technology
An indication of degree of firing in silica brick is its

None of these
Specific gravity
Fusion point
RUL

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Refractory Technology
__________ is not a single oxiderefractory.

Zirconia
Magnesia
None of these
Silicon carbide

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