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Refractory Technology

Refractory Technology
Hollow refractory bricks are made by

Hand moulding
Slip casting
Extrusion
Pressing/machine moulding

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Refractory Technology
Slide gates in teeming laddie used for steel pouring in ingot moulds is lined with __________ bricks.

Bakelite impregnated or fused periclase
Silica
Fireclay
Semi-silica

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Refractory Technology
'Spinel', a refractory mineral is chemically represented as

MgAl2O₃
MgSO₄
MgAl2O₃.2H₂O
MgAl2O₄

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Refractory Technology
Which property is important for bricks used in the combustion chamber & dome of blast furnace stoves?

All of these
High resistance to spalling
High refractoriness
High strength and density

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Refractory Technology
Permeability of bricks is a measure of the

Melting point
Refractoriness
Expansion during heating
Rate at which a fluid will pass through the pores

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Refractory Technology
SiO₂ percentage in firebrick is about

55-60
80-85
35-40
>94

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