Efficient burning of anthracite coal requires Options: A . &nbspLow preheat of air B . &nbspFine grinding C . &nbspHigh excess air D . &nbspAll of the above

Efficient burning of anthracite coal requires

Question

Efficient burning of anthracite coal requires

Options:

A . Low preheat of air

B . Fine grinding

C . High excess air

D . All of the above

Answer: Option B

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