Discussion
The suspension preheater at a modern plant consists of
Answer: D
Correct answer: a tower of cyclones through which meal and gas pass
Meal is injected into the gas duct between stages, heats almost instantly because the particles are fine and fully suspended, and is then separated by the cyclone and dropped into the next duct down. Four to six stages take the meal to around 800 degrees using the kiln’s own exhaust.
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