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Refractory Technology

Refractory Technology
Which of the following impurities reduces the refractoriness of magnesite bricks?

SiO₂
CaO
Al2O₃
All of these

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Refractory Technology
Magnesite chrome bricks are used in the

All of these
Roof lining of basic open hearth & other basic furnaces
Soaking pits
Reheating furnaces

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Refractory Technology
Which is an acidic refractory?

Chrome magnesite
Magnesite
Fireclay
Dolomite

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Refractory Technology
Tar dolomite bricks are used in the

Basic Bessemer converter
Electric furnaces
Basic open hearth furnace
All of these

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Refractory Technology
Resistance to slag attack of a refractory

All of these
Depends on the nature of slag & refractory
Decreases at higher temperature
Decreases, if defective joints & cracks exist in the refractory

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Refractory Technology
An indication of degree of firing in silica brick is its

None of these
Specific gravity
RUL
Fusion point

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