Discussion
State whether the following is true or false.
Secondary and tertiary air are both drawn from the clinker cooler.
Answer: C
Correct answer: True
Both are cooler air recovered from the clinker. Secondary air passes into the kiln hood to feed the main flame; tertiary air is ducted separately up to the calciner to feed the fuel burnt there. Taking both from the cooler is what recovers the clinker’s heat back into the process.
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