Method for removing heavy metals from incinerator fly ashes

Details Method for removing heavy metals from incinerator fly ashes Method for removing heavy metals from incinerator fly ashes

2004-12-20

2009-12-22

Bos, Steven (Department: 1793)

Hazardous or toxic waste destruction or containment

Processes for making harmful chemical substances harmless,...

By reacting with chemical agents

C588S412000

Reexamination Certificate

active

07635796

ABSTRACT:
A method of removing heavy metals from incinerator fly ashes has the steps of: Determining the type of waste and its treating mode of an incinerator, and determining the outlet(s) and quantities of original fly ash (OFA) and reacted fly ash (RAF) in the incineration facility; Sampling OFA and RFA from their generation positions and detecting properties of OFA and RFA respectively; Calculating heavy metal(s) which exceeds the TCLP standard; Determining an optimal mixing ratio of OFA and RFA for two independent outlets, or the quantity of OFA or RFA that should be added with the convergence of OFA and RFA for one outlet; Extracting heavy metals from the mixed fly ash by a liquid to remove the heavy metals.

REFERENCES:
patent: 5196620 (1993-03-01), Gustin et al.
patent: 5512257 (1996-04-01), Frey
patent: 6500395 (2002-12-01), Mercier et al.
patent: 2003/080199 (2003-03-01), None
patent: 97/44500 (1997-12-01), None

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