Plasma vitrification of waste materials

Details Plasma vitrification of waste materials Plasma vitrification of waste materials

1995-12-01

1997-06-10

Czaja, Donald E.

Glass manufacturing

Processes

Fining or homogenizing molten glass

65 174, 65 19, 65 213, 651341, 651347, 651359, 651363, 588 2, 588 10, 588 11, 588 12, 588 14, 588 18, 588 19, 588 20, 588212, 588252, 588253, 501 28, 501155, C03B 516

Patent

active

056371276

ABSTRACT:
This invention provides a process wherein hazardous or radioactive wastes in the form of liquids, slurries, or finely divided solids are mixed with finely divided glassformers (silica, alumina, soda, etc.) and injected directly into the plume of a non-transferred arc plasma torch. The extremely high temperatures and heat transfer rates makes it possible to convert the waste-glassformer mixture into a fully vitrified molten glass product in a matter of milliseconds. The molten product may then be collected in a crucible for casting into final wasteform geometry, quenching in water, or further holding time to improve homogeneity and eliminate bubbles.

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patent: 5281790 (1994-01-01), Nguyen et al.
patent: 5340372 (1994-08-01), Macedo et al.
patent: 5399833 (1995-03-01), Camacho

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