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Refractory Technology

Refractory Technology
Refractory materials are never used in the construction of

Segar cones
Ovens & retorts
Pressure vessels
Orton cones

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Refractory Technology
Chrome magnesite bricks are

Having higher RUL than silica bricks
Acidic in nature
Made by mixing 30% chromite and 70% periclase
Neutral in nature

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Refractory Technology
Grog

All of these
Is a non-plastic material
Contains both alumina and silica
Iscrushed firebrick

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Refractory Technology
Refractoriness/fusion points of 'superduty' refractories is __________ °C.

1520-1630
> 1730
1630-1670
> 2000

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Refractory Technology
Refractoriness under loads (RUL) is quite close to the fusion temperature (PCE) for __________ bricks.

Silica
Dolomite
Very low alumina
Fireclay

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Refractory Technology
Carbon refractories have very high

Thermal conductivity
Wetting characteristics
Refractoriness
Both B and C

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