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Processing of solid mixed waste containing radioactive and hazardous materials

United States Patent

*** EXPIRED ***
5,750,822
May 12, 1998
View the Complete Patent at the US Patent & Trademark Office
Apparatus for the continuous heating and melting of a solid mixed waste bearing radioactive and hazardous materials to form separate metallic, slag and gaseous phases for producing compact forms of the waste material to facilitate disposal includes a copper split water-cooled (cold) crucible as a reaction vessel for receiving the waste material. The waste material is heated by means of the combination of a plasma torch directed into the open upper portion of the cold crucible and an electromagnetic flux produced by induction coils disposed about the crucible which is transparent to electromagnetic fields. A metallic phase of the waste material is formed in a lower portion of the crucible and is removed in the form of a compact ingot suitable for recycling and further processing. A glass-like, non-metallic slag phase containing radioactive elements is also formed in the crucible and flows out of the open upper portion of the crucible into a slag ingot mold for disposal. The decomposition products of the organic and toxic materials are incinerated and converted to environmentally safe gases in the melter.
Gotovchikov; Vitaly T. (Moscow, RU), Ivanov; Alexander V. (Moscow, RU), Filippov; Eugene A. (Moscow, RU)
Institute of Chemical Technology (PlasTech) (Moscow, RU)
08/ 557,961
November 13, 1995
CONTRACTUAL ORIGIN OF THE INVENTION The United States Government has rights in this invention pursuant to a contract with the United States Department of Energy.