METHOD FOR IMMOBILIZING RADIOACTIVE WASTES IN CERAMIC MATRIX Russian patent published in 2000 - IPC

FIELD: environment control. SUBSTANCE: method used to include radioactive wastes, primarily those incorporating actinic and rare-earth elements, into Synroc ceramic involves their thermal concentration, mixing of concentrate with titanium, calcium, zirconium, aluminum, and barium oxides to obtain desired blend, mixing of blend with carbon-containing material to obtain carbon-containing blend of desired moisture content, delivery of wet carbon-containing blend to molten ceramic material surface, its cooling down to obtain Synroc ceramic with radioactive wastes included into so as to make them suitable for long-time storage. EFFECT: improved quality of product, facilitated procedure, reduced time, improved safety, enlarged functional capabilities. 6 cl