US 12,128,422 B2
Method and facility for treating fly ash
Joaquin Arbos, Villeneuve d'Ascq (FR); Alain Cordonnier, Villeneuve d'Ascq (FR); and Fabrice Lauwerie, Villeneuve d'Ascq (FR)
Assigned to FIVES FCB, Villeneuve d'Ascq (FR)
Appl. No. 18/263,295
Filed by FIVES FCB, Villeneuve d'Ascq (FR)
PCT Filed Jan. 20, 2022, PCT No. PCT/FR2022/050110
§ 371(c)(1), (2) Date Jul. 27, 2023,
PCT Pub. No. WO2022/162295, PCT Pub. Date Aug. 4, 2022.
Claims priority of application No. 2100893 (FR), filed on Jan. 29, 2021.
Prior Publication US 2024/0033751 A1, Feb. 1, 2024
Int. Cl. B03B 9/04 (2006.01); B03C 7/00 (2006.01); B03C 7/02 (2006.01); B07B 4/00 (2006.01); B07B 4/02 (2006.01)
CPC B03B 9/04 (2013.01) [B03C 7/00 (2013.01); B03C 7/02 (2013.01); B07B 4/00 (2013.01); B07B 4/025 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for treating fly ash containing an initial carbon concentration to obtain ash containing a predetermined final carbon concentration less than the initial concentration, the method comprising:
a step of granulometric separation of the ash into at least two fractions, a coarse fraction and a fine fraction, the coarse fraction having a granulometry greater than the fine fraction,
a step of extracting carbon from the ash,
wherein the extraction step is subsequent to the separation step, and
wherein said extraction step is implemented solely on the coarse fraction, by electrostatic separation, and is not implemented on the fine fraction,
the method further comprising a step of drying the ash during which the temperature of said ash is above 60° C.