الفهرس | Only 14 pages are availabe for public view |
Abstract The present work is concerned with the chemical processing of El-Sella mineralization in order to recover its two metal values; namely uranium and REEs. For this purpose acid leaching using sulfuric acid has been studied to determine the optimum conditions to obtain their maximum possible leaching efficiencies. The obtained leach liquor was then subjected to two solvent extraction circuits; viz a Trioctyl amine circuit for selective anionic uranium extraction whereas in the second circuit, REEs have been extracted using the cationic extractant (di-2-ethyl hexyl phosphoric acid, DEHPA). Due to the specific nature of El-Sella ore material, which is highly argillic in a manner to require a low solid/liquid ratio in the leaching circuit with consequent expensive solid/liquid separation and filtration, it was found necessary to directly apply the solvent leaching procedure. The latter was applied herein for uranium after proper acid pug leaching of the working ore material using TOA. |