Related Questions

Calcination of limestone is not done in a __________ kiln for producing lime.
A Vertical shaft
B Rotary
C Fluidised bed
D Fixed bed
Thermal efficiency of a limestone calcination rotary kiln may be around __________ percent.
A 20
B 40
C 65
D 80
How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln?
A 500°C
B 750°C
C 1000°C
D 1500°C
Rotary kilns meant for calcination of limestone are lined with chrome magnesite in __________ zone.
A Preheating
B Cooling
C Burning
D All of the above
Which of the following is used for calcination of limestone and dolomite in industrial practice?
A Fluidised bed reactor
B Moving bed reactor
C Fixed bed reactor
D None of these
Rotary lime kiln is an example of a/an __________ system.
A Closed
B Open
C Isolated
D Non-thermodynamic
Calcination of iron ores is done
A To remove moisture
B To remove carbonic acid
C By roasting in heaps
D All the above
Quick lime (or caustic lime)
A Is obtained by the calcination of pure lime stone
B Has great affinity to moisture
C Is amorphous
D All the above
If the iron ore contains clay as an impurity, the flux added during calcination, is
A Clay
B Lime stone
C Argillaceous iron ore
D All the above
Calcination of gypsum produces
A Plaster of paris
B Salt cake
C Nitre cake
D Lime

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