| 摘要 |
PROBLEM TO BE SOLVED: To efficiently utilize incineration ash for various uses, without fear of contaminating soil or water, in a sol improving agent with non-fear of contaminating water, a grassland improving material, a backfilling material and embankment by suppressing dissolution of fluorine and chrome in incineration ash. SOLUTION: Fluorine and chrome in the incineration ash are made so insoluble as to the quantity of dissolved fluorine of 0.8 mg/L or less and the quantity of dissolved chrome of 0.05 mg/L or less in a dissolving testing method based on Notification No.18 of the Ministry of the Environment (2003) by mixing water of 10-100% (to ash) to the incineration ash containing fluorine and chrome obtained through treating, by an electrostatic precipitator and a bag filter, on exhaust gas generated in burning coal, RPF and paper-making sludge, and by drying it by heating. COPYRIGHT: (C)2008,JPO&INPIT
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