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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
2000
700

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Refractory Technology
Dolomite bricks have good resistance to attack by

Iron oxide
None of these
Molten steel
Lime slag

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

High alumina
Superduty fireclay
Silica
Carborundum

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Refractory Technology
Si percentage in silica refractories used in the walls of coke oven is about

60
45
95
80

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Refractory Technology
Zirconia refractory

Does not react with basic slags
Can not be used as an insulator
Has poor electrical conductivity at high temperature
Is produced from baddeleyite

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Refractory Technology
Capacity of a refractory brick to withstand-sudden changes in temperature is denoted by the property called

Refractoriness
Spalling resistance
Refractoriness under load (RUL)
None of these

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