East West Trade Group, Inc.

The United States of America As Represented by the Department of Energy

Vyacheslav F Pavlov

Vasily F Shabanov

Troy Joseph Tranter

Albert S Aloy

Alexander A Tretyakov

Tatiana Vereshchagina

Alexander G Anshits

Yevgeny Macheret

Dieter A Knecht

Yurii A Revenko

Olga M Sharonova

Natalia V Sapozhnikova

Eduard M Kostin

Elena N Voskresenskaya

Sergei G Bayakin

Alexandr G Anshits

Solidification of liquid radioactive waste, and other hazardous wastes, is accomplished by the method of the invention by incorporating the waste into a porous glass crystalline molded block. The porous block is first loaded with the liquid waste and then dehydrated and exposed to thermal treatment at 50-1,000&deg; C. The porous glass crystalline molded block consists of glass crystalline hollow microspheres separated from fly ash (cenospheres), resulting from incineration of fossil plant coals. In a preferred embodiment, the porous glass crystalline blocks are formed from perforated cenospheres of grain size &minus;400&plus;50, wherein the selected cenospheres are consolidated into the porous molded block with a binder, such as liquid silicate glass. The porous blocks are then subjected to repeated cycles of saturating with liquid waste, and drying, and after the last cycle the blocks are subjected to calcination to transform the dried salts to more stable oxides. Radioactive liquid waste can be further stabilized in the porous blocks by coating the internal surface of the block with metal oxides prior to adding the liquid waste, and by coating the outside of the block with a low-melting glass or a ceramic after the waste is loaded into the block.

Method for solidification of radioactive and other hazardous waste

A method of obtaining glass materials from ash-slag. Waste wherein the waste is heated to a melting point temperature and melted in a reducing medium. The obtained melt is cooled by a thermal shock to form a foamed glass material. Prior to heating the charge, the carbon content therein is brought to 3.0-8.0 wt %, and the foamed glass material is foamed under a flow of a gaseous medium resulting form decomposition of carbides formed in the melt as a result of carbon content adjustment. Carbon addition also reduces iron oxide present in the waste, this reduction facilitating iron separation from the foamed material.

Materials produced from ash-slag waste

Method of producing glass materials from ash-slag waste

Growing community of inventors

Krasnoyarsk, Russia

Vyacheslav F Pavlov