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Free-flowing behaviour of fluidised raw meal is exploited in

  • A.the clinker cooler grate
  • B.air slides and blending silos
  • C.the rotary kiln shell itself
  • D.the primary crusher in the quarry

Answer: B

Passing low-pressure air through a porous membrane makes the powder behave much like a fluid, which allows both gentle conveying and thorough mixing. The kiln, crusher and cooler all handle coarse material for which the technique is useless.

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