8258Chemical EngineeringMedium
Critical Speed (Nc) of a ball mill is given by (where R1 and R2 are radii of ball mill and the ball respectively)?
ANc = (1/2π). √(R1 – R2/g)
BNc = (1/4π). √(g/R1 – R2)
CNc = (1/π). √(g/R1 – R2)
DNc = (1/2π). √(g/R1 – R2)
Correct answer
D. Nc = (1/2π). √(g/R1 – R2)
Explanation
The correct answer is Nc = (1/2π). √(g/R1 – R2).