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Chemical Engineering - Refractory Technology

Exercise : Refractory Technology - Section 1
21.
Refractoriness of a typical silica brick corresponds to Segar cone number, '32', which is equivalent to a temperature of __________ °C.
1380
1520
1710
1915
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
Beryllia (which is used in making crucibles for melting uranium & thorium) is superior to alumina in all respects for high temperature (> 1900°C ) use, except
cost
electrical conductivity
thermal conductivity
fusion point
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture ?
Cork
Saw dust
Sand
Chemically prepared foam
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
Firing of refractory brick is done to
dehydrate the dried refractory.
develop stable mineral forms in them.
form ceramic bonds necessary for development of high crushing strength in the finished product.
all (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
Chemically, mullite refractories is
3Al2O3.2SiO2
Al2O3
ZrSO4
ThO2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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