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Title: Plasma vitrification of waste materials

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.
 [1];  [2];  [3]
  1. (Oakmont, PA)
  2. (North Huntingdon, PA)
  3. (Plum Boro, PA)
Issue Date:
OSTI Identifier:
Westinghouse Electric Corporation (Pittsburgh, PA) RLO
Patent Number(s):
US 5637127
Contract Number:
Research Org:
Westinghouse Hanford Co
Country of Publication:
United States
plasma; vitrification; waste; materials; provides; process; hazardous; radioactive; wastes; form; liquids; slurries; finely; divided; solids; mixed; glassformers; silica; alumina; soda; etc; injected; directly; plume; non-transferred; torch; extremely; temperatures; heat; transfer; rates; makes; convert; waste-glassformer; mixture; vitrified; molten; glass; product; matter; milliseconds; collected; crucible; casting; final; wasteform; geometry; quenching; water; holding; time; improve; homogeneity; eliminate; bubbles; waste material; heat transfer; waste materials; radioactive waste; finely divided; molten glass; plasma torch; radioactive wastes; transfer rate; glass product; final waste; divided solid; divided solids; /65/501/588/