Discussion
The dry process has displaced the wet process in cement manufacture because it avoids
Answer: C
Correct answer: evaporating water from the kiln feed
The wet process feeds the kiln a slurry of thirty per cent or more water, and every tonne of that water must be evaporated using fuel before any calcination begins. The dry process grinds and blends the raw materials dry, so the heat goes into the chemistry rather than into boiling water, and the fuel per tonne of clinker falls by roughly a third.
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