Process for concentrating thorium containing magnesium slag
US5678241A · kind A · utility
3Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1996 |
| Grant date | Oct 14, 1997 |
| Priority date | — |
| Expiry date | Nov 13, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21F9/28
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.