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Title: Plasma vitrification of waste materials

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.

Inventors:
 [1];  [2];  [3]
+ Show Inventor Affiliations
  1. Oakmont, PA
  2. North Huntingdon, PA
  3. Plum Boro, PA
Issue Date:
Research Org.:
Westinghouse Hanford Co
OSTI Identifier:
870986
Patent Number(s):
5637127
Assignee:
Westinghouse Electric Corporation (Pittsburgh, PA)
Patent Classifications (CPCs):
C - CHEMISTRY C03 - GLASS C03B - MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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DOE Contract Number:  
AC06-87RL10930
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
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/

Citation Formats

McLaughlin, David F, Dighe, Shyam V, and Gass, William R. Plasma vitrification of waste materials. United States: N. p., 1997. Web.
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McLaughlin, David F, Dighe, Shyam V, & Gass, William R. Plasma vitrification of waste materials. United States.
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McLaughlin, David F, Dighe, Shyam V, and Gass, William R. Wed . "Plasma vitrification of waste materials". United States. https://www.osti.gov/servlets/purl/870986.
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@article{osti_870986,
title = {Plasma vitrification of waste materials},
author = {McLaughlin, David F and Dighe, Shyam V and Gass, William R},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {1}
}
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