METHOD OF PREVENTING ELUTION OF HEAVY METAL IN INCINERATION FLYING ASH

摘要

PROBLEM TO BE SOLVED: To provide a treatment method for flying ashes capable of suppressing the elution of lead to a permissible value or below and safely treating the flying ashes.;SOLUTION: This method of treating the flying ashes comprises adding a pH control agent at a prescribed weight to the waste incineration flying ashes while subjecting the flying ashes to humidifying and kneading by using a kneading machine in a refuse incineration facility of implementing blowing of slaked lime for the purpose of removing the hazardous materials included in stack gas. Phosphoric acid is used as the pH control agent in the method described above.;COPYRIGHT: (C)2002,JPO