METHOD FOR SEPARATING LEAD FROM COMBUSTION ASH

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PROBLEM TO BE SOLVED : To provide a treatment method by which a new circulation system can be established and a social contribution can be made by stopping the landfill disposal of lead-containing combustion ash and effectively utilizing the combustion ash for soil use, e.g., as a soil improvement material, a grassland improvement material, a backfill material, an earth filling material, etc. SOLUTION : In the method for separating a lead component from the combustion ash, one kind or plural kinds selected from iron powders and iron compounds are previously added in an amount of 0.1 to 50 mass% to the combustion ash containing the lead component and then heat treatment is carried out to eliminate the lead component from the combustion ash. COPYRIGHT : (C)2007, JPO&INPIT