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Refractory Technology

Refractory Technology
__________ bricks should not be used in oxidising atmosphere.

Fireclay
Silica
Tar dolomite
Carbon

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Refractory Technology
Dilatometer is used for the determination of __________ of refractories.

Resistance to CO attack
RUL
Modulus of rupture
Permanent linear change

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Refractory Technology
Hot metal runner in blast furnace are lined with __________ bricks.

Silica
Fireclay
Magnesite
Carborundum

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Refractory Technology
Cold crushing strength of fireclay bricks is about __________ kgf/cm².

500-1000
200-400
100-150
50-100

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Refractory Technology
Chromite refractories are used in

Bottom of soaking pits
Between acid & basic linings in basic open hearth furnaces to prevent their chemical action with each other
Neither A nor B
Both A & B

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Refractory Technology
Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to

Thermal spalling
CO attack
Slag attack
Fusion under load

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