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Fluid Mechanics
Mechanical Operations
GATE 2018
Medium

Critical speed of a ball mill depends on

  • Athe radius of the mill (shell) and the radius of the particles
  • Bthe radius of the mill (shell) and the density of the particles
  • Cthe radius of the balls and the radius of the particles
  • the radius of the balls and the radius of the mill (shell)

Explanation

Critical speed Nc=(1/2π)√(g/(R−r)), where R is the mill shell radius and r is the ball radius.

Source: GATE CH 2018 (2018)

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