Efficient burning of anthracite coal requires______________________?
Correct answer: C. Fine grinding
- A. Low preheat of air
- B. High excess air
- C. Fine grinding
- D. All A., B. and C
Explanation
Anthracite has low volatile content and is difficult to ignite and burn, so fine grinding increases its surface area and improves combustion. High excess air causes heat loss, while low air preheat is not beneficial.
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