Refractories are dried in the _______________?
Correct answer: B. Tunnel kilns
- A. Rotary kilns
- B. Tunnel kilns
- C. Sun
- D. None of these
Explanation
Refractory green shapes are dried under controlled conditions in tunnel kilns or tunnel driers before firing, which prevents rapid moisture removal and cracking. Rotary kilns are mainly used for calcination rather than controlled drying of shaped bricks.
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