METHOD FOR INSOLUBILIZATION OF HEAVY METAL IN COAL ASH, AND METHOD FOR MANUFACTURING CONSTRUCTION MATERIAL IN WHICH HEAVY METAL IS INSOLUBILIZED

摘要

PROBLEM TO BE SOLVED: To provide a method for insolubilization of a heavy metal which can sufficiently suppress elution of a heavy metal in coal ash and can satisfy wide environment standard, and a method for manufacturing a construction material with use of such a coal ash.SOLUTION: A method for insolubilization of a heavy metal in coal ash characterized in that a ferrous sulfate and a blast furnace cement B kind are added to coal ash, water of a quantity suitable for slurrying is further added to the coal ash and mixing thereof is performed.SELECTED DRAWING: None