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Title: Leaching of Korean uranium bearing graphitic ore with sulfuric acid solution

Abstract

Laboratory studies have been conducted to obtain optimum conditions for extracting uranium values from a graphitic ore. Experiments were carried out to extract uranium from the ore ground to minus 48 mesh with sulfuric acid as a leachant and with manganese dioxide as an oxidizing agent. The uranium extraction from the ore with sulfuric acid was found to be very sensitive to pH change throughout the leaching operation. The major dissolution of the uranium from the ore was obtained at an oxidation potential of 450 mV(versus SCE) within the narrow pH range (2.0 + or - 0.2). Experimental results indicate that the uranium(IV) in the ore is oxidized to soluble U(VI) by hydrolytic ferric ions formed within the given pH range.

Authors:
; ; ;
Publication Date:
Research Org.:
Korea Institute of Energy and Resources Seoul
OSTI Identifier:
5659516
Resource Type:
Journal Article
Journal Name:
AIChE Symp. Ser.; (United States)
Additional Journal Information:
Journal Volume: 78:216
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; URANIUM; LEACHING; URANIUM COMPOUNDS; OXIDATION; URANIUM ORES; ORE PROCESSING; BENCH-SCALE EXPERIMENTS; GRAPHITE; MANGANESE OXIDES; OPTIMIZATION; OXIDIZERS; PH VALUE; REPUBLIC OF KOREA; SOLUTIONS; SULFURIC ACID; URANIUM DEPOSITS; URANIUM MINERALS; ACTINIDE COMPOUNDS; ACTINIDES; ASIA; CARBON; CHALCOGENIDES; CHEMICAL REACTIONS; DEVELOPING COUNTRIES; DISPERSIONS; DISSOLUTION; ELEMENTAL MINERALS; ELEMENTS; GEOLOGIC DEPOSITS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; MANGANESE COMPOUNDS; MATERIALS; METALS; MINERAL RESOURCES; MINERALS; MIXTURES; NONMETALS; ORES; OXIDES; OXYGEN COMPOUNDS; PROCESSING; RADIOACTIVE MATERIALS; RADIOACTIVE MINERALS; RESOURCES; SEPARATION PROCESSES; TRANSITION ELEMENT COMPOUNDS; 050300* - Nuclear Fuels- Mining- (-1987)

Citation Formats

Lee, K Y, Hahn, K Ju.J., Im, S J, and Kom, W S. Leaching of Korean uranium bearing graphitic ore with sulfuric acid solution. United States: N. p., 1982. Web.
Lee, K Y, Hahn, K Ju.J., Im, S J, & Kom, W S. Leaching of Korean uranium bearing graphitic ore with sulfuric acid solution. United States.
Lee, K Y, Hahn, K Ju.J., Im, S J, and Kom, W S. 1982. "Leaching of Korean uranium bearing graphitic ore with sulfuric acid solution". United States.
@article{osti_5659516,
title = {Leaching of Korean uranium bearing graphitic ore with sulfuric acid solution},
author = {Lee, K Y and Hahn, K Ju.J. and Im, S J and Kom, W S},
abstractNote = {Laboratory studies have been conducted to obtain optimum conditions for extracting uranium values from a graphitic ore. Experiments were carried out to extract uranium from the ore ground to minus 48 mesh with sulfuric acid as a leachant and with manganese dioxide as an oxidizing agent. The uranium extraction from the ore with sulfuric acid was found to be very sensitive to pH change throughout the leaching operation. The major dissolution of the uranium from the ore was obtained at an oxidation potential of 450 mV(versus SCE) within the narrow pH range (2.0 + or - 0.2). Experimental results indicate that the uranium(IV) in the ore is oxidized to soluble U(VI) by hydrolytic ferric ions formed within the given pH range.},
doi = {},
url = {https://www.osti.gov/biblio/5659516}, journal = {AIChE Symp. Ser.; (United States)},
number = ,
volume = 78:216,
place = {United States},
year = {1982},
month = {1}
}