Fly ash washing

High residue quality

Acid washing extracts salts and heavy metals from fly ash and concentrates them into recyclable form. The process pays for itself because the concentrate contains over 20% zinc. This operation is combined with wet flue gas scrubbing; the acid effluent from the scrubber is used as the wash liquor for the fly ash.

Fly ash treatment yields extremely leach-resistant residues with low pollutant levels meeting the limits of the eluate test – the worlds toughest. Acid washing reduces the dioxin content of the fly ash to well below all applicable limits.

Your advantages:

• Clean residues that are easily disposed of 
• Recovery of zinc 
• Low treatment costs