Which of the following is not a directly fired furnace ?
Correct answer: A. By-product coke oven
- A. By-product coke oven
- B. Calcination kiln
- C. Sintering furnace
- D. Open hearth furnace
Explanation
A by-product coke oven heats coal indirectly through hot combustion gases flowing in side flues, rather than firing the charge directly. Calcination kilns, sintering furnaces, and open-hearth furnaces are directly fired units.
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