In a ball mill, the volume occupied by the balls (when the mill is stopped) is about _______________ percent of the volume of the mill?
Correct answer: B. 50
- A. 35
- B. 50
- C. 70
- D. 85
Explanation
A ball mill is commonly operated with a ball charge of about 40 to 50% of its internal volume. Thus 50% is the closest standard value.
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