A method of reducing unburned carbon levels in coal ash

Details A method of reducing unburned carbon levels in coal ash A method of reducing unburned carbon levels in coal ash

B - Operations, Transporting

01

D

B01D 53/83 (2006.01) B01D 53/74 (2006.01) B01J 19/08 (2006.01) C04B 18/08 (2006.01) F23J 1/00 (2006.01)

Patent

CA 2417022

There is disclosed a method of reducing carbon levels in fly ash. The method comprises the steps of: (a) placing the fly ash in a microwave reactor; (b) exposing said fly ash to microwave radiation in the presence of carbon-free material so as to raise its temperature to at least 600°C while agitating the fly ash in the presence of oxygen; and; (c) terminating exposure of said fly ash to said microwave radiation when the carbon content of the fly ash falls below a predetermined value. The method is also used to reduce ammonia levels in fly ash.

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