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Chemical Engineering
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Refractory Technology
Comments
Question
Which furnace consumes maximum refractory annually in an integrated steel plant?
Options
A. Soaking pit
B. Blastfurnace
C. L.D. converter
D. Coke ovens
Correct Answer
L.D. converter
Refractory Technology problems
Search Results
1. High refractorinness of refractory bricks means, that it has a
Options
A. high spalling resistance.
B. low spalling resistance.
C. high resistance to fusion.
D. low porosity.
Show Answer
Scratch Pad
Discuss
Correct Answer: high resistance to fusion.
2. The main raw material for manufacture of silicon carbide refractories is
Options
A. corrundum
B. carborundum
C. bauxite
D. periclase
Show Answer
Scratch Pad
Discuss
Correct Answer: carborundum
3. Sillimanite is a __________ refractory.
Options
A. basic
B. neutral
C. high alumina
D. insulating
Show Answer
Scratch Pad
Discuss
Correct Answer: high alumina
4. Chrome magnesite is not used in the
Options
A. inner lining of L.D. converter.
B. aluminium melting furnaces.
C. wear out lining of steel melting furnaces.
D. all (a), and (b) and (c)
Show Answer
Scratch Pad
Discuss
Correct Answer: wear out lining of steel melting furnaces.
5. Conversion of silica mineral to cristobalite is accompanied by reduction in its
Options
A. volume
B. specific gravity
C. both (a) & (b)
D. neither (a) nor (b)
Show Answer
Scratch Pad
Discuss
Correct Answer: specific gravity
6. Carbon refractories have very high
Options
A. wetting characteristics
B. refractoriness
C. thermal conductivity
D. both (b) and (c)
Show Answer
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Discuss
Correct Answer: both (b) and (c)
7. Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns.
Options
A. 1800
B. 2200
C. 2400
D. 2700
Show Answer
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Discuss
Correct Answer: 2700
8. Chrome magnesite bricks are
Options
A. acidic in nature.
B. neutral in nature.
C. having higher RUL than silica bricks.
D. made by mixing 30% chromite and 70% periclase.
Show Answer
Scratch Pad
Discuss
Correct Answer: having higher RUL than silica bricks.
9. Which of the following bricks has the most close values of RUL and PCE?
Options
A. Silica bricks
B. Fireclay bricks
C. High alumina bricks
D. Tar dolomite bricks
Show Answer
Scratch Pad
Discuss
Correct Answer: Silica bricks
10. Silica bricks have low spalling resistance below 600°C, due to its
Options
A. very high thermal conductivity.
B. high co-efficient of expansion upto this temperature.
C. high thermal diffusivity.
D. low refractoriness.
Show Answer
Scratch Pad
Discuss
Correct Answer: high co-efficient of expansion upto this temperature.
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