Sludge inerting method

Details Sludge inerting method Sludge inerting method

C - Chemistry, Metallurgy

02

F

C02F 11/18 (2006.01) B09C 1/08 (2006.01) C02F 11/00 (2006.01) C04B 18/04 (2006.01) C04B 28/02 (2006.01)

Patent

CA 2425868

The invention concerns a method for inerting a sludge (1) containing heavy metals and organic matters which consists in adding phosphoric acid (2) to the sludge and in calcining (6) it. A hydraulic binder (9) is mixed with the calcined product (7) and mixed with water (8). The resulting mixture (11) is subjected to setting and hardening.

Procédé d'inertage d'une boue (1) contenant des métaux lourds et des matières organiques selon lequel on additionne de l'acide phosphorique (2) à la boue et on la soumet à une calcination (6). Un liant hydraulique (9) est mélangé au produit de la calcination (7) et gâché avec de l'eau (8). Le mélange résultant (11) est soumis à une prise et un durcissement.

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