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Refractory Technology

Refractory Technology
Which is a neutral refractory?

Magnesite chrome
Magnesia
Graphite
Silica

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Refractory Technology
Magnesite bricks are used in those parts of furnaces, which are

Subjected to temperature fluctuation
Required to resist corrosive basic slag
None of these
Subjected to high load

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Refractory Technology
10 to 30% magnesite is added to chromite to produce chrome-magnesite refractories. Magnesite addition is mainly done to improve the __________ of chromite.

Crushing strength
Resistance to slag
Spalling resistance
Refractoriness

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Refractory Technology
Which is not a high alumina refractory?

Dolomite
Bauxite
Corrundum
Mullite

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Refractory Technology
Which is the stable form of silica between 1470°C and the melting point 1713°C ?

Quartz
Cristobalite
None of these
Tridymite

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Refractory Technology
Lower wall courses of soaking pits are made of __________ bricks to avoid the action of molten slag & scale.

Lowduty fireclay
Chrome or magnesite
Silicon carbide
Silica

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