PROCEDURE FOR PROCESSING URANIUM ORE Russian patent published in 2011 - IPC C22B60/02 C22B3/26 

FIELD: metallurgy.

SUBSTANCE: silicate uranium ore is crushed and crumbled; further, it is leached with sulphuric acid with addition of nitric acid as oxidant. Uranium is extracted and refined from impurities using mixture of extragents. Also as mixture of extragents there is used synergetic mixture containing di(2-ethyl-hexyl)phosphoric acid - 0.05-0.075 mole/l, tri-alkyl-amine - 0.05-0.075 mole/l in hydrocarbon dissolver at ratio of volumes of organic and water phases V_O-V_W= 1-3÷6. Upon extraction organic phase saturated with uranium is washed with solution of sulphuric acid. Further, uranium is re-extracted with solution of coal-ammonia salts producing crystals of ammonia-uranyl-tri-carbonate and is filtered. Produced crystals are tempered to production of protoxide-oxide of uranium.

EFFECT: output of finished product in form of protoxide-oxide of uranium of high quality.

2 tbl, 2 dwg, 3 ex