Discussion
Put the zones of a rotary cement kiln in the order the meal passes through them.
1. Clinkering zone 2. Drying zone 3. Cooling zone 4. Calcination zone
Answer: C
Moisture goes first, the carbonate decomposes next, the compounds form at the hottest point, and the clinker is quenched last. In a modern plant the first two stages happen in the preheater and precalciner rather than in the kiln itself.
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