Method of fly ash beneficiation and apparatus for same

Details Method of fly ash beneficiation and apparatus for same Method of fly ash beneficiation and apparatus for same

1994-02-23

1995-03-21

Bell, Mark L.

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106478, 106DIG1, C04B 1806

Patent

active

053991940

ABSTRACT:
A method for beneficiating particles of fly ash containing carbon which includes the following steps. The particles of fly ash are introduced into a dry bubbling fluid bed and air is supplied thereto. The fluid bed is operated at a temperature ranging from approximately 800.degree. to 1300.degree. F., during which the air intimately mixes with the particles of fly ash and oxidizes the carbon therein. The beneficiated particles of fly ash are then removed from the fluid bed. The carbon reduction in the particles of fly ash permits these particles to be used as pozzolan to replace a portion of the cement in concrete. An apparatus is provided for performing the method of the invention.

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Holusha, John, "From the Ashes, a Plus for Utility", The New York Times, Nov. 24, 1993; p. C5.

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