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REFRACTORY TECHNOLOGY

Refractory Technology
Carbon refractories have very high

Refractoriness
Both B and C
Wetting characteristics
Thermal conductivity

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Refractory Technology
High porosity refractory bricks have

Poor resistance to the peneration of molten slag, metal & flue gases
All of these
Poor heat conductivity & low strength
Better thermal spalling resistance

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Refractory Technology
Which is not a high alumina refractory?

Dolomite
Corrundum
Mullite
Bauxite

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Refractory Technology
Which of the following has the lowest electrical resistivity?

Alumina
Zircon
Graphite
Fireclay

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Refractory Technology
Periclase is

ZrSO₄
MgCO₃
Amorphous magnesite
Crystalline form of MgO

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