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REFRACTORY TECHNOLOGY

Refractory Technology
Mullite is chemically represented by

3Al2O₃ . 2SiO₂
Al2O₃ . SiO₂
Al2O₃ . 2SiO₂
2Al2O₃ . 3SiO₂

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Refractory Technology
Chrome magnesite is not used in the

Aluminium melting furnaces
All of these
Inner lining of L.D. converter
Wear out lining of steel melting furnaces

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Refractory Technology
Magnesite bricks are used in those parts of furnaces, which are

Subjected to temperature fluctuation
Required to resist corrosive basic slag
Subjected to high load
None of these

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Refractory Technology
Silicon carbide refractories are used in the

Zinc smelting furnace
All of these
Ceramic recuperators
Muffle furnace

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

CO attack
Thermal spalling
Fusion under load
Slag attack

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