Why are heavy impurities provided in the process of ball and race mill?

Question

TuteeHUB · Accepted Answer

To resist downward thrust caused by secondary air stream

TuteeHUB · Answer

To resist upward thrust caused by secondary air stream

TuteeHUB · Answer

To resist downward thrust caused by primary air stream

TuteeHUB · Answer

To resist upward thrust caused by primary air stream

TuteeHUB · Answer

To resist downward thrust caused by secondary air stream

1.	Why are heavy impurities provided in the process of ball and race mill?
A.	To resist upward thrust caused by secondary air stream
B.	To resist downward thrust caused by primary air stream
C.	To resist upward thrust caused by primary air stream
D.	To resist downward thrust caused by secondary air stream
Answer» D. To resist downward thrust caused by secondary air stream

Discussion