EXTRACTION METHOD OF BERYLLIUM FROM BERYLLIUM-BEARING SPODUMENE CONCENTRATE Russian patent published in 2009 - IPC C22B35/00 C22B26/12 C22B3/04 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, particularly to extraction method of beryllium from beryllium -bearing spodumene concentrate. Method includes hydrometallurgical treatment of the concentrate with receiving of lithium carbonate, alum-sodium alums and beryllium-bearing filter cakes. Filter cakes are treated with receiving of rough beryllium hydroxide and it is received from it pure beryllium hydroxide. Additionally rough beryllium hydroxide is transferred into main beryllium carbonate by leaching of ammonium carbonate solution, taken from the calculation 29-35 g of ammonium carbonate per 1 g of beryllium, with formation of solution of ammonium-beryllium carbonate and insoluble residue. It is separated solution of ammonium-beryllium carbonate from the rest. Solution is subject to decomposition by boiling with formation of insoluble basic beryllium carbonate. It is separated from the mother solution and it is received from it pure beryllium hydroxide.

EFFECT: receiving of commercially pure beryllium hydroxide .

1 tbl, 1 ex