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Chemical Engineering - Refractory Technology

Exercise : Refractory Technology - Section 1
16.
Capacity of a refractory brick to withstand-sudden changes in temperature is denoted by the property called
spalling resistance.
refractoriness.
refractoriness under load (RUL).
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Magnesite bricks are used in those parts of furnaces, which are
subjected to temperature fluctuation.
required to resist corrosive basic slag.
subjected to high load.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
Which is not a basic refractory ?
Chrome magnesite
Magnesite
Dolomite
Silicon carbide
Answer: Option
Explanation:
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19.
Thoria
has high fusion temperature (> 3000°C) but poor resistance to thermal shock.
has high resistance to basic slags.
which is expensive & radioactive, is used in crucibles for melting high purity metals.
all (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
Which property of refractories is the most important for top section of the blast furnace?
Resistance to abrasion.
Resistance to slag peneration.
Stability of volume at high temperature.
Resistance to corrosion by slag.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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