Refractory Technology
Rate of slag attack on refractories increases with rise in temperature due to the

Increased thermal conductivity of brick
Oxidising condition in the furnace
None of these
Decreased viscosity of slag

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Refractory Technology
Fireclay refractories

Combine with salts (e.g. chlorides sulphates etc.) & bases (e.g. lime, magnesia etc.) forming fusible aluminates silicates etc
Shrink during firing
Are not resistant to the action of basic slags
All of these

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