______________ bricks are used in the burning zone of a cement rotary kiln ?
Correct answer: A. High alumina
- A. High alumina
- B. Fireclay
- C. Thoria
- D. Silicon carbide
Explanation
High-alumina bricks are used in the burning zone of cement rotary kilns because they withstand high temperature, abrasion, and chemical attack. Fireclay bricks are generally inadequate for this severe zone, while thoria is uneconomical.
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