Discussion
An attrition mill differs from a conventional ball mill in that it
Answer: B
Correct answer: stirs the media with an internal agitator
An attritor holds the media in a stationary tank and stirs them with arms on a shaft, so the energy is delivered directly rather than by tumbling the whole shell. That gives far higher energy density, so the same fineness is reached in a fraction of the time - hours rather than days.
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