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Refractory Technology

Refractory Technology
Outer combustion chamber of blast furnace stove is lined with __________ bricks.

Zirconia
Chrome magnesite
Silica
Fireclay

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Refractory Technology
High porosity refractory bricks have

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

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Refractory Technology
Porosity of silica bricks varies from __________ percent.

20 to 30
5 to 10
45 to 60
60 to 75

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Refractory Technology
Which is a neutral refractory?

Magnesia
Graphite
Silica
Magnesite chrome

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Refractory Technology
Refractories used in/for __________ should have low thermal conductivity.

Coke ovens
Muffle furnaces
Regenerators
Insulation

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Refractory Technology
Chrome magnesite is not used in the

Aluminium melting furnaces
All of these
Inner lining of L.D. converter
Wear out lining of steel melting furnaces

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