Patent ID: 6755901
Filing Date: 2004-06-29
Classification: B01D,B09B,C22B,Y02P

Abstract:
A method for reducing the amount of ammonia compounds affixed to fly ash, the method comprising:introducing an amount of fly ash into a heating chamber, at least a portion of the amount of fly ash comprising particulates having ammonia compounds afford to the particulates; exposing the amount of fly ash to flowing air having a temperature of at least 1500Â° F.; transferring heat from gases exiting the heating chamber to preheat a second amount of fly ash, at least a portion of the second amount of fly ash comprising particulates having ammonia compounds affixed to the particulates; introducing the second amount of fly ash into the heating chamber; and exposing the second amount of fly ash to flowing air having a temperature of at least 1,500Â° F.