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Refractory Technology

Refractory Technology
Periclase is

Crystalline form of MgO
Amorphous magnesite
MgCO₃
ZrSO₄

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Refractory Technology
Cold crushing strength of fireclay bricks is about __________ kgf/cm².

50-100
500-1000
100-150
200-400

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Refractory Technology
Chrome magnesite is not used in the

All of these
Aluminium melting furnaces
Inner lining of L.D. converter
Wear out lining of steel melting furnaces

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Refractory Technology
Bauxite calcining rotary kilns are lined with __________ bricks.

Corundum
Fireclay
Carbon
85% alumina

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Refractory Technology
Zirconia refractory

Does not react with basic slags
Can not be used as an insulator
Is produced from baddeleyite
Has poor electrical conductivity at high temperature

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Refractory Technology
Chromite refractories are

Fired at a temperature of 600°C only
Neutral refractory
Acidic refractory
Basic refractory

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