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Refractory Technology

Refractory Technology
A steel member used in the furnace construction to take the thrust of the brickwork is called

Buckstay
Baffle
Armouring
Breast wall

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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.

Refractoriness
Crushing strength
Spalling resistance
Resistance to slag

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Refractory Technology
RUL of refractories depends on the

Presence of impurities like iron & alkali
Physical structure
Chemical composition
All of these

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Refractory Technology
Cermets are combination of ceramic and metallic materials due to which they have high strength & resistance to high temperature. Cermets are used in the

Roof of electric furnaces
Insulation of high temperature furnaces
Hearth of the blast furnace
Nuclear reactors, missiles & space crafts

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Refractory Technology
Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of

Crucibles used for melting of high purity metals
Segar cones
Muffles for muffle furnaces
Insulating bricks

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Refractory Technology
Refractory materials are never used in the construction of

Pressure vessels
Ovens & retorts
Segar cones
Orton cones

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