Discussion
State whether the following is true or false.
Air heated in the clinker cooler is used as combustion air in the kiln.
Answer: A
Correct answer: True
The air heated in the cooler is drawn straight into the kiln as secondary combustion air, and into the calciner as tertiary air. Recovering that heat is a large part of why a modern plant burns around 3,000 kilojoules per kilogram of clinker rather than the 6,000 a wet process needed.
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