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A separator that removes stones and other dense foreign matter from grain is a _____.

  • A.conditioner
  • B.destoner
  • C.scalper
  • D.polisher

Answer: B

Correct answer: destoner

A destoner separates on density, using an inclined vibrating deck with air rising through it: the fluidised bed lets the dense stones sink to the deck and climb it while the lighter grain floats and flows down. It is fitted in every mill line because a grain-sized stone will pass every screen and every aspirator and then damage the rolls.

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