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Refractory Technology

Refractory Technology
Periclase is

ZrSO₄
MgCO₃
Amorphous magnesite
Crystalline form of MgO

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Refractory Technology
Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns.

2400
1800
2200
2700

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Refractory Technology
Which is not a natural insulating material?

Asbestos
Diatomaceous earth/kieselgur
Vermiculite
None of these

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Refractory Technology
Firing of refractory brick is done to

All of these
Dehydrate the dried refractory
Develop stable mineral forms in them
Form ceramic bonds necessary for development of high crushing strength in the finished product

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Refractory Technology
Cold crushing strength of refractories depends upon its

Firing temperature
Texture
All of these
Composition

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Refractory Technology
Which is the stable form of silica between 1470°C and the melting point 1713°C ?

Cristobalite
None of these
Quartz
Tridymite

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