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Refractory Technology

Refractory Technology
Refractory materials are never used in the construction of

Orton cones
Pressure vessels
Segar cones
Ovens & retorts

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Refractory Technology
Magnesite refractories are used for the construction of those furnaces, which are

Not subjected to fluctuation in temperature
Both (b) and ©
Not required to resist the corrosive action of basic slag
Used for raising & maintaining high temperature

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Refractory Technology
'Super refractories' are made from pure

Carbides
Borides
Nitrides
Oxides

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Refractory Technology
Silica refractories are not used in

Open hearth furnace roof
Beehive coke ovens
Coke oven walls
Dome and upper portion of B.F. stoves

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Refractory Technology
Tar dolomite bricks are used in the

Basic Bessemer converter
All of these
Basic open hearth furnace
Electric furnaces

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Refractory Technology
Spalling of a refractory means its

Resistancce to compressive loads
Resistance to chemical action of gases and molten fluxes
Softening
Fracture due to uneven expansion at high temperature

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