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Refractory Technology

Refractory Technology
In panel test for spalling resistance, the average face temperature of panel assembly is maintained at __________ °C for 24 hours.

1000
1600
700
2000

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Refractory Technology
Grog

Iscrushed firebrick
Contains both alumina and silica
Is a non-plastic material
All of these

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Refractory Technology
High refractorinness of refractory bricks means, that it has a

High spalling resistance
Low porosity
High resistance to fusion
Low spalling resistance

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Refractory Technology
High porosity refractory bricks have

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

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Refractory Technology
Refractory bricks with lower permeability is produced by using

Finer grog size
Higher firing temperature
All of these
Higher moulding pressure

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Refractory Technology
Lower part of hot metal mixer are lined with __________ bricks.

Superduty fireclay
High alumina
Silica
Carborundum

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