Ceramic recuperators used for waste heat recovery from high temperature flue gas going out of the furnace is made of________________?
Correct answer: B. Silicon carbide
- A. Fireclay
- B. Silicon carbide
- C. Corundum
- D. Siliceous fireclay
Explanation
Silicon carbide is preferred for high-temperature ceramic recuperators because it has high thermal conductivity, excellent thermal-shock resistance and good strength. Ordinary fireclay is less suitable under these severe conditions.
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