Which of the following equations is Rittinger's crushing law? (Where P = power required by the machine, m = feed rate, k = a constant, D̅ sa & D̅ sb = volume surface mean diameter of feed & product respectively) ?
Correct answer: C. P/m = K . (1/ D̅ sb - 1/D̅ sa)
- A. P/m = K/ √Dp
- B. P/m = K . ln D̅ sa/D̅ sb
- C. P/m = K . (1/ D̅ sb - 1/D̅ sa)
- D. None of these
Explanation
Rittinger's law states that energy or power per unit mass is proportional to the new surface area produced. With volume-surface mean diameters, this gives K(1/D̄sb − 1/D̄sa), option c.
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