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Refractory Technology

Refractory Technology
Which is not an alumino-silicate refractory?

Tar dolomite bricks
Mullite bricks
Fireclay bricks
High alumina bricks

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Refractory Technology
Chrome magnesite brick is not used for lining the

Burning zone of limestone rotary kilns
Hearth of soaking pits
Bottom hearth of reheating furnace
Coke oven regenerator

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Refractory Technology
Magnesite refractories have low resistance to

Both B and C
Disintegration on sudden change of temperature
Attack by basic slag
Abrasion

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Refractory Technology
Fusion point of a basic refractory material is

Increased by the addition of acid oxides
Reduced by the addition of acid oxides
Always less than 1000°C
Not affected by the addition of acid oxides

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Refractory Technology
Maximum alumina content in high alumina refractory can be as high as __________ percent.

50
90
30
70

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Refractory Technology
Chrome magnesite bricks are

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

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