Vitrification of waste

Details Vitrification of waste Vitrification of waste

1992-04-01

1999-04-06

Gorgos, Kathryn

Hazardous or toxic waste destruction or containment

Containment

Solidification, vitrification, or cementation

588 1, 588253, 20415715, 20415743, A62D 300

Patent

active

058910115

ABSTRACT:
A method for encapsulating and immobilizing waste for disposal. Waste, preferably, biologically, chemically and radioactively hazardous, and especially electronic wastes, such as circuit boards, are placed in a crucible and heated by microwaves to a temperature in the range of approximately 300.degree. C. to 800.degree. C. to incinerate organic materials, then heated further to a temperature in the range of approximately 1100.degree. C. to 1400.degree. C. at which temperature glass formers present in the waste will cause it to vitrify. Glass formers, such as borosilicate glass, quartz or fiberglass can be added at the start of the process to increase the silicate concentration sufficiently for vitrification.

REFERENCES:
patent: 4376598 (1983-03-01), Brouns et al.
patent: 4906290 (1990-03-01), Worner
patent: 4935114 (1990-06-01), Varma
patent: 4940865 (1990-07-01), Johnson et al.
patent: 5024740 (1991-06-01), Birken et al.
Walsh, Stephen. "Turning Up the Heat on Hazardous Waste." Chemical Engineering Oct. 1990 pp. 47-54.
Hardwick et al. International Seminar on Chemistry and Process Engineering for High--Level Liquid Waste Solidification. 1981, pp. 53-67.

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