METHOD OF SELECTIVE EXTRACTION OF URANIUM FROM ORES Russian patent published in 1997 - IPC

Abstract RU 2094512 C1

FIELD: hydrometallurgy. SUBSTANCE: ore is subjected to crushing and wet grinding to form slurry, which is leached at pH 4.2-2.2 on one or several apparatuses. Thereafter, with no preliminary neutralization, leaching at pH 4.6-2.0 is combined with countercurrent sorption of uranium maintaining pH value in head (in slurry displacement direction)ionite-treatment apparatus within the range of 4.6-2.6, advantageously 4.0-3.6, and that in tail ionite-treatment apparatus within the range of 3.4-2.0 (3.2-2.4). Temperature of acid and ionite treatment of slurry is maintained within the range 30-70 C (40-60 C). Oxidant employs manganese compounds. Desorption of uranium from ionite is effected through agency of sulfate-nitrate solutions. EFFECT: optimized process conditions. 4 cl, 1 dwg, 5 tbl

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RU 2 094 512 C1

Authors

Spirin Eh.K.

Shcheludchenko V.G.

Litvinenko V.G.

Gorbunov V.A.

Kolov G.N.

Dates

1997-10-27—Published

1995-11-09—Filed