METHOD FOR SOLIDIFICATION OF FLY ASH

PROBLEM TO BE SOLVED: To provide a method for solidification of fly ash wherein eluation of heavy metals in the fly ash can be made to a reference value or lower provided by a law and chemicals used for the treatment are easy to be handled and inexpensive and the burnt exhaust gas can be used as a c...

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Bibliographische Detailangaben
Hauptverfasser: HISAYOSHI SHOJI, SAKAMOTO TOMOHIKO
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a method for solidification of fly ash wherein eluation of heavy metals in the fly ash can be made to a reference value or lower provided by a law and chemicals used for the treatment are easy to be handled and inexpensive and the burnt exhaust gas can be used as a carbon dioxide source and the price is inexpensive and exhaust of carbon dioxide gas can be decreased and in addition, as the fly ash treated with a sulfate and carbon dioxide is solidified with a hydraulic substance such as a cement, handling after the treatment is easy. SOLUTION: The method for solidification of fly ash comprises adding one or two or more substances among sulfates, aluminum-containing substances and alkaline substances into the fly ash and water, kneading the mixture, blowing carbon dioxide gas and then, adding a hydraulic substance thereinto and kneading the mixture.