Related Questions

Which of the following grinding mills has the horizontally arranged rods as the grinding elements thereby delivering more uniform granular products with minimum fines?
A Compartment mill
B Rod mill
C Pebble mill
D Tube mill
Grinding wheel made of silicon carbide is most suitable for grinding materials of low tensile strength (e.g; tough bronze). Grinding is a __________ operation.
A Turning
B Dressing
C Forming
D Surface finishing
Size reduction of the __________ can be suitably done by ball mills, crushing rolls and rod mills.
A Metalliferrous ores
B Non-metallic ores
C Basic slags
D Asbestos & mica
__________ mills fall in the category of tumbling mills,
A Ball and pebble
B Rod and tube
C Compartment
D All of the above
Ball mills and tube mills with flint or porcelain balls are used for size reduction of
A Asbestos
B Rubber
C Non-metallic ores
D Limestone
A fine grained grinding wheel should not be used for grinding __________ materials.
A Hard
B Brittle
C Soft & ductile
D None of these
For efficient grinding, ball mills must be operated
A At a speed less than the critical speed
B At a speed more than the critical speed
C At a speed equal to the critical speed
D With minimum possible small balls
Rod mills employed for grinding
A Employ a steel shell having L/D ratio of 1.5 to 3.0
B Is useful for handling sticky materials
C Employ steel rods of 2-12 cms diameter extending over full length of the mill
D All of the above
A. __________ mill is a revolving mill divided into two or more sections by perforated partitions in which preliminary grinding takes place at one end and the finishing grinding at the discharge end.
A Compartment
B Tube
C Rod
D Pebble
Wet grinding in a revolving mill __________ as compared to dry grinding.
A Gives less wear on chamber walls
B Requires more energy
C Increases capacity
D Complicates handling of the product

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