Related Questions

Thermal efficiency of a limestone calcination rotary kiln may be around __________ percent.
A 20
B 40
C 65
D 80
Calcination of limestone is not done in a __________ kiln for producing lime.
A Vertical shaft
B Rotary
C Fluidised bed
D Fixed bed
Calcination of limestone to produce lime is done in a __________ kiln.
A Tunnel
B Rotary
C Vertical shaft
D Both B and 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
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 iron ores is done
A To remove moisture
B To remove carbonic acid
C By roasting in heaps
D All the above
Calcination of gypsum produces
A Plaster of paris
B Salt cake
C Nitre cake
D Lime
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
The reductant used in the extraction of magnesium from calcined dolomite via Pidgeon's process is
A Pure carbon
B Pure silicon
C Ferro silicon
D Ferro manganese
Tar dolomite bricks are used in the
A Basic Bessemer converter
B Basic open hearth furnace
C Electric furnaces
D All of the above

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