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- Title
Extraction of uranium in caustic sludge from the production of nuclear fuel components by countercurrent dissolution and acid curing.
- Authors
Hu, Eming; Lei, Zhiwu; Wang, Hongqiang; Su, Hao; Zhou, Wen; Wan, Qiang; Zhu, Fangping; Wang, Qingliang
- Abstract
The uraniferous caustic sludge (UCS) produced in the production of uranium fuel components was hardly to leach directly, due to its very low-grade uranium(<10%). A two-step operation, consisting of the three-stage countercurrent dissolution and subsequent H2SO4 curing processes, was conducted to deal with UCS. The results of the three-stage countercurrent dissolution process showed that the uranium content in UCS was decreased from 8.66 to 1.06%, the residual ratio was less than 18%, and the leaching rate of uranium was 98% or more. The results of H2SO4 curing process showed that the leaching rate of uranium could be controlled at more than 99.9%, and the uranium content of UCS was decreased to 0.19%. The process may serve the purpose of recovering uranium from uranium-containing alkaline residues with complex source.
- Subjects
URANIUM; NUCLEAR fuels; URANIUM mining; COUNTERCURRENT processes; URANIUM as fuel; CURING; LEACHING
- Publication
Journal of Radioanalytical & Nuclear Chemistry, 2022, Vol 331, Issue 6, p2445
- ISSN
0236-5731
- Publication type
Article
- DOI
10.1007/s10967-022-08234-z