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State whether the following is true or false.
A precalciner kiln is longer than a kiln without one.

  • A.False only at small scales
  • B.True
  • C.False
  • D.True only at large scales

Answer: C

Correct answer: False

A precalciner kiln is considerably shorter. Drying, heating and almost all the calcining have been moved into the tower, so the kiln has only to complete the last of the calcination and carry out the clinkering. Length to diameter ratios fall from around 15 to nearer 11.

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