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Which of the following forces acts in ball mill?

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+2 votes
in Food Processing Unit Operations by (110k points)
Which of the following forces acts in ball mill?

(a) Gravitational force

(b) Centrifugal force

(c) Gravitational and centrifugal forces

(d) Does not depend on any force

The question was posed to me during an online exam.

This is a very interesting question from Size Reduction in division Size Reduction of Food Processing Unit Operations

1 Answer

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Best answer
The correct choice is (c) Gravitational and centrifugal forces

Best explanation: In ball mills, product is released by the gravitational pull and drop to the bottom and the centrifugal force keeps the ball in contact with the mill wall. Due to centrifugal force, if the speed of rotation of mill is faster, the balls are carried to more distance therefore critical speed is required for rotational speed at which centrifuging occurs.

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