| 摘要 |
PROBLEM TO BE SOLVED: To provide a volume reducing treatment method based on the washing treatment of molten fly ash capable of removing soluble salts in the molten fly as by a relatively reduced amount of washing water, that is, capable of enhancing the volume reducing effect on the molten fly ash and capable of also reducing even a drain amount and the concentration of residual heavy metals in wastewater. SOLUTION: A method for removing soluble salts from molten fly ash containing soluble salts discharged from waste melting facilities is disclosed. This method includes two processes, that is, (a) a process for adding washing water to the molten fly ash to elute soluble salts in the molten fly ash and dehydrating the mixture of washing water with the fly ash to obtain wastewater and washing residue and a process (b) for adding washing water to the washing residue obtained in the process (a) to elute residual soluble salts in the washing residue into water and dehydrating this washing residue to which washing water is added to obtain a separated liquid and a volume reduced cake. COPYRIGHT: (C)2004,JPO
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