Hazardous or toxic waste destruction or containment – Containment – Solidification – vitrification – or cementation
Patent
1991-09-10
1993-06-15
Bell, Mark L.
Hazardous or toxic waste destruction or containment
Containment
Solidification, vitrification, or cementation
588231, 588233, 588251, 588249, 106710, 106DIG1, 10628718, C04B 1808, C04B 1806, C04B 1400, C04B 1830
Patent
active
052201120
ABSTRACT:
Fly ash generated from incineration of municipal solid waste (MSW) when placed in landfills can under mild acid conditions leach 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 substantially less than about 800.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.
REFERENCES:
patent: 3837872 (1974-09-01), Conner
patent: 4209335 (1980-06-01), Katayama et al.
patent: 4299611 (1981-11-01), Penberthy
patent: 4629509 (1986-12-01), O'Hara et al.
patent: 4737356 (1988-04-01), O'Hara et al.
patent: 4840671 (1989-06-01), Lynn et al.
patent: 4877453 (1989-10-01), Loggers et al.
patent: 4917733 (1990-04-01), Hansen
patent: 4941772 (1990-07-01), Roesky et al.
patent: 4971627 (1990-11-01), Koslowski et al.
Altemose, II Francis A.
Bucci Donald P.
Easterbrook Nancy C.
Givens Edwin N.
Klosek Joseph
Air Products and Chemicals Inc.
Bell Mark L.
Marcheschi Michael
Ryder Thomas G.
Simmons James C.
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