Hazardous or toxic waste destruction or containment – Containment – Solidification – vitrification – or cementation
Patent
1993-04-28
1994-09-13
Corbin, David H.
Hazardous or toxic waste destruction or containment
Containment
Solidification, vitrification, or cementation
10628718, 106DIG1, 588231, 588251, B09B 300, C04B 1808
Patent
active
053470737
ABSTRACT:
Fly ash generated from incineration of municipal solid waste (MSW) when placed in landfills can under mild acid conditions 1each lead and cadmium. A process for stabilizing lead in this fly ash is presented which involves calcining a mixture of the fly ash and certain calcium-containing compounds in the presence of an oxygen containing gas stream at a temperature greater than about 475.degree. C. and less than about 600.degree. C. for times from about 30 minutes up to about 5 hours. Such treated MSW fly ash will give leachates containing lead concentrations less than the EPA regulatory limit.
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Goff Stephen P.
Hochleitner Wolfgang A.
Air Products and Chemicals Inc.
Corbin David H.
Marsh William F.
Simmons James C.
Wolff Robert J.
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