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Refractory Technology

Refractory Technology
Which is not an acidic refractory?

High alumina refractory
Carbon black
Fireclay
Silica

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Refractory Technology
Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory

Castables
Cements
Mortars
None of these

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Refractory Technology
__________ of carbon blocks in the hearth of blast furnace helps in avoiding skull formation, when it becomes cold.

Low porosity
Non-wetting characteristics
High thermal conductivity
High density

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Refractory Technology
Porosity is induced in insulating refractories by adding

Powdered naphthalene
Ammonium chloride/sulphate
Calcium phosphate
All of these

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Refractory Technology
Alumina-graphite bricks are used for lining the

Neither A nor B
Continuous casting systems
Slide gate in teeming laddies
Both A & B

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

Magnesite
Fireclay
Carborundum
Silica

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