Discussion
Dusty clinker leaving a kiln usually indicates
Answer: C
Correct answer: insufficient liquid phase to nodulise the material
About a quarter of the charge melts in the burning zone, and it is that liquid which draws the particles together into nodules. Too little of it - from a low alumina or iron content, or from underburning - leaves the material as dust, which is difficult to handle, cools too fast and carries free lime.
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