PROCEDURE FOR EXRACTING URANIUM FROM CRUDE ORE Russian patent published in 2010 - IPC C22B60/02 C22B3/08 

FIELD: metallurgy.

SUBSTANCE: procedure consists in crushing and wet crumbling of source raw material producing pulp. Also ore containing brannerite is used as source raw material. Upon wet crumbling pulp is concentrated, leached with sulphuric acid and separated. Upon separation upper discharge is directed to counter flow sorption of uranium, while lower discharge containing brannerite fraction is acidated with sulphuric acid to 40-80 g/l producing acidic pulp with S:L<1:4. Produced acidic pulp is radiated with a flow of accelerated electrons at energy of absorbed radiation dose 1.5-1.6 kgr/s during 4-8 min. Further uranium is leached at mixing and at temperature 60-70°C during 2-3 hours and produced pulp is condensed. Upon condensation there is formed upper discharge which is supplied to source raw material leaching, while lower discharge goes to waste.

EFFECT: extraction of uranium from hard opened brannerite crude ore.

3 cl, 7 tbl, 1 dwg, 2 ex