Abstract: A line for cooling hot granular solids, the temperature of which is greater than 1000° C., the cooling line comprising in particular: a first cooler which is provided with at least one grate intended to receive the granular solids; a second cooler which is arranged downstream of the first cooler in the direction of movement of the granular solids, said second cooler being rotatable and comprising a material inlet through which the granular solids enter and a material outlet through which the granular solids leave, said cooling line being configured so that the granular solids move successively from the first cooler to the second cooler.

Abstract: Disclosed is 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 including: —a step of granulometric separation of the ash into at least two fractions, a coarse traction and a fine fraction, the coarse fraction having a granulometry greater than the fine fraction; —a step of extracting carbon from the ash; a method wherein the extraction step is subsequent to the separation step, the extraction step being implemented solely on the coarse fraction, by electrostatic separation, the method including a step of drying the ash during which the temperature of the ash is above 60° C.

Abstract: Disclosed is 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 including: —a step of granulometric separation of the ash into at least two fractions, a coarse traction and a fine fraction, the coarse fraction having a granulometry greater than the fine fraction; —a step of extracting carbon from the ash; a method wherein the extraction step is subsequent to the separation step, the extraction step being implemented solely on the coarse fraction, by electrostatic separation, the method including a step of drying the ash during which the temperature of the ash is above 60° C.