The operating speed of a ball mill should be the critical Examveda
The operating speed of a ball mill should be _____ the critical speed. a) Less than b) Much more than c) At least equal to d) Slightly more than ... Which of the following gives the work required for size reduction of coal to 200 mesh in a ball mill most accurately ? A. Rittinger's law. B. Kick's law. C. Bond's law. D. None of these.