The operating speed of a ball mill should be ______________ the critical speed?

Related Mcqs:

_______________ centrifuge is the most suitable for separation of non-friable crystals?

A. Tubular bowl B. Disc-bowl C. Perforated horizontal basket continuous D. Suspended batch basket...

Chance process is used for the________________?

A. Cleaning of coal B. Concentration of iron ore C. Concentration of pyrites D. Water treatment...

Rittinger’s number designates the new surface created per unit mechanical energy absorbed by the material being crushed. Larger value of Rittinger’s number of a material indicates its________________?

A. Easier grindability B. Poor grindability C. High power consumption in grinding D. None of these...

With increase in the pressure drop across the cake, the specific cake resistance for the compressible sludge________________?

A. Increases B. Decreases C. Remains constant D. Increases linearly...

_______________ is defined as the geometric mean of the relative rejections and the relative recoveries of two minerals?

A. Separation efficiency B. Selectivity index C. Concentration ratio D. None of these...