Hot face insulating linings of high purity alumina fused mullite are used, where_________________?
Correct answer: D. All A., B. and C.
- A. Very high temperatures are involved
- B. Highly reducing conditions are involved
- C. Presence of iron or silica is harmful
- D. All A., B. and C.
Explanation
High-purity alumina fused-mullite linings are selected for very high temperatures, reducing atmospheres, and service where iron or silica impurities would be harmful. These conditions explain why all three statements apply.
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