METHOD OF TREATING MATERIAL COMPRISING HEAVY METALS BY INCINERATION, AND INCINERATOR FOR INCINERATING MATERIAL COMPRISING HEAVY METALS

摘要

PROBLEM TO BE SOLVED: To provide a method of treating ash and an incinerator each capable of volatilizing and separating heavy metals without melting ash.;SOLUTION: The incinerator equipped with an incineration furnace 2 that is kept in a reducing atmosphere and heats a material to be treated comprising heavy metals in the presence of a chlorine-containing substance at a temperature lower than the melting point of the heavy metals to volatilize and separate them is characterized by comprising a feeder for feeding an alkalinity controlling agent to the material to be treated in the preceding step of the incinerator 2 or in the upstream of the incinerator 2, with the feeder allowed to feed the alkalinity controlling agent to the material to be treated in such an amount that its alkalinity after the addition of the alkalinity controlling agent thereinto becomes not higher than 0.4 or not lower than 1.1.;COPYRIGHT: (C)2009,JPO&INPIT