Discussion
A grate cooler recovers heat from the clinker by
Answer: D
Correct answer: blowing air through a bed of clinker on a moving grate
The clinker lies on a grate through which cooling air is forced from below, so it is quenched rapidly and the air is heated in the process. Rapid cooling matters for clinker quality as well as for heat recovery - slow cooling lets the alite decompose and the free lime rise.
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