Chemical Engineering :: Mechanical Operations
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Maximum size reduction in a ball mill is done by the, __________ action.
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increasing the capacity of a screen __________ the screen effectiveness.
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The power number for a stirred tank becomes constant at high Reynolds number. In this limit, the variation of power input with impeller rotational speed (N) is proportional to
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Bond crushing law
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Flow of filtrate through the cake in a plate and frame filter press is best described by the __________ equation.
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The controlling resistance in a rotary drum vacuum filter is the __________ resistance.
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Which of the following is used for primary crushing of very hard lumpy materials ?
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Coal is finally pulverised to 200 mesh size for burning in boilers by a
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Crushing efficiency is the ratio of the
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The resistance offered by the filter used in a bag filter is proportional to (where, c = dust concentration, and s = particle size )
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A.
calls for relatively less energy for the smaller product particles, than does the Rittinger law.
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B.
is less realistic in estimating the power requirements of commercial crushers.
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C.
states that the work required to form particle of any size from very large feed is proportional to the square root of the volume to surface ratio of the product.
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D.
states that the work required for the crushing is proportional to the new surface created.
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