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Refractory Technology

Refractory Technology
Which is not a high alumina refractory?

Bauxite
Dolomite
Mullite
Corrundum

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Refractory Technology
Which is not an alumino-silicate refractory?

Fireclay bricks
High alumina bricks
Mullite bricks
Tar dolomite bricks

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Refractory Technology
Periclase is

Crystalline form of MgO
ZrSO₄
MgCO₃
Amorphous magnesite

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Refractory Technology
Beryllia (which is used in making crucibles for melting uranium & thorium) is superior to alumina in all respects for high temperature (> 1900°C ) use, except

Fusion point
Cost
Electrical conductivity
Thermal conductivity

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Refractory Technology
Bottom of basic open hearth furnace are constructed of

Dead burnt magnesite ramming mass
Semi-silica bricks
Silicon carbide bricks
Porous fireclay bricks

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Refractory Technology
Silica bricks are never used for lining the

By-product coke ovens
Dome of blast furnace stoves
Beehive coke ovens
Roof of open hearth furnace

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