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Refractory Technology

Refractory Technology
Rotary kilns meant for calcination of limestone are lined with chrome magnesite in __________ zone.

Cooling
Preheating
Burning
All of these

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Refractory Technology
Chromite refractories are used in

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

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Refractory Technology
Carbon bricks are not used in the lining of the

Highly chemical resistant equipments
Blast furnace hearth
Electric furnaces
Combustion chamber of blast furnace stoves

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Refractory Technology
SiO₂ percentage in firebrick is about

35-40
>94
55-60
80-85

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Refractory Technology
Test piece for determination of RUL of a refractory is heated in a/an

Neutral atmosphere
Reducing atmosphere
Oxidising atmosphere
Electric furnace

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

High alumina
Superduty fireclay
Carborundum
Silica

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