Ash content in the coke produced from a coking coal having 20% ash may be around _____________ percent?
Correct answer: D. 24
- A. 6
- B. 12
- C. 18
- D. 24
Explanation
Ash is conserved during coking, but volatile matter is removed, so its percentage rises. With a typical coke yield near 83%, 20% ash in the coal becomes about 20/83, or 24%, in the coke.
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