Process for concentrating thorium containing magnesium slag

Details Process for concentrating thorium containing magnesium slag Process for concentrating thorium containing magnesium slag

1996-11-13

1997-10-14

Mai, Ngoclan

Hazardous or toxic waste destruction or containment

Destruction or containment of radioactive waste

Chemical conversion to a stable solid for disposal

423 11, 423158, 423166, 588 20, G21F 900

Patent

active

056782411

ABSTRACT:
The present invention describes a process to reduce the volume and/or weight of magnesium slag when the magnesium slag contains radioactive thorium. The process contacts the magnesium slag as an aqueous slurry with an acid in a pH range from about 4.0 to about 8.0, preferably from about 5.0 to about 5.5, followed by separating insoluble solids from the aqueous solution. Optionally, the acid digested solids are heated, either before or after the acid digestion, at a temperature from about 350.degree. to about 500.degree. C. The solid waste can then be further compacted, if desired, prior to disposal.

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