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Refractory Technology

Refractory Technology
Chemically, mullite refractories is

ZrSO₄
3Al2O₃.2SiO₂
Al2O₃
ThO₂

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Refractory Technology
Basic bricks are not made of

Magnesite
Fireclay
Foresterite
Chromite

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

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

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Refractory Technology
Cermets are combination of ceramic and metallic materials due to which they have high strength & resistance to high temperature. Cermets are used in the

Roof of electric furnaces
Hearth of the blast furnace
Nuclear reactors, missiles & space crafts
Insulation of high temperature furnaces

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Refractory Technology
Lower wall courses of soaking pits are made of __________ bricks to avoid the action of molten slag & scale.

Lowduty fireclay
Silica
Chrome or magnesite
Silicon carbide

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Refractory Technology
The largest consumer of refractories is the __________ industry.

Power
Metallurgical
Cement
Fertiliser

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