Process for the disposal of flue gas residues

Details Process for the disposal of flue gas residues Process for the disposal of flue gas residues

1993-06-02

1994-11-22

Aftergut, Karen

Hazardous or toxic waste destruction or containment

Containment

Solidification, vitrification, or cementation

264 31, 264 86, 264333, 264DIG69, 405128, 588249, B09B 100, B28B 300, E04B 116

Patent

active

053671163

ABSTRACT:
Solid residues obtained in flue gas purification, in particular flue dusts, are disposed in an environmentally compatible and economical manner by acid extracting heavy metals from the residues, precipitating the heavy metals from the extract, separating the precipitate from the mother liquor, subjecting the precipitate containing heavy metals to mechanical stress during which procedure the water contained in the precipitate is released and the precipitate itself is resuspended, and then adding a hydraulic binder to the resuspended precipitate containing heavy metals and/or to the extracted residues separately from one another. The binder-containing mixture can be used to form moldings which, after hardening, are employed for the erection of boundary walls in a landfill, Additionally or alternatively, the plastic binder-containing mixture can be introduced in the form of layers into preformed landfill spaces, where it then hardens.

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patent: 4911757 (1990-03-01), Lynn et al.
patent: 5037286 (1991-08-01), Roberts
patent: 5045115 (1991-09-01), Gmunder et al.
patent: 5245114 (1993-09-01), Forrester

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