Higher percentage of ash in coal meant for the production of metallurgical grade coke ___________________?
Correct answer: D. None of these
- A. Decreases the hardness of coke
- B. Decreases the abrasion resistance of coke
- C. Causes brittleness in steel
- D. None of these
Explanation
Coal ash is undesirable in metallurgical coke because it increases slag formation and lowers the effective fixed-carbon content. The listed effects are not the standard direct statement of ash influence, so none of them is the best answer.
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