Method and facility for treating fly ash
AssigneeFives Fcb
InventorsJoaquin Arbos, Alain Cordonnier, Fabrice Lauwerie
Life of this patent
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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.
Claims20
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.
A plant for treating fly ash, the plant configured to move the fly ash in a given direction of movement in the plant, said plant comprising:
- a granulometric separator configured to separate 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,
- an electrostatic separator arranged downstream of the granulometric separator, in the direction of movement of the ash, and configured to implement separation solely on the coarse fraction, by electrostatic separation, and is not configured to implement separation on the fine fraction,
- a cooler arranged upstream of the granulometric separator, and
- a drying device.
Dependencies are inferred from the claim text.