PROCEDURE FOR EXTRACTION OF NIOBIUM AND TANTALUM FROM TITANIUM CONTAINING RARE EARTH METAL CONCENTRATE Russian patent published in 2011 - IPC C22B34/24 C22B3/16 

FIELD: metallurgy.

SUBSTANCE: procedure for extraction of niobium and tantalum from titanium containing rare earth concentrate consists in treatment of fine crumbled concentrate with reagent containing octanol-1 saturated with fluoro-hydrogen acid with production of pulp by mixing; in transition of main part of niobium and tantalum and part of titanium in form of fluoro-metallate acids into extract and in concentrating residual part of niobium fluorides and tantalum in solid phase and another part of titanium in form of its fluoride compound. Further, pulp is settled and extract is separated from solid phase. Loparite concentrate is used as titanium containing rare earth metal concentrate. Titanium is concentrated in solid phase in form of non-hydrated fluoro-titanate of sodium. Octanol-1 saturated with fluoro-hydrogen acid to concentration 110-140 g/l is used as reagent, while treatment of concentrate is carried out at initial temperature 10-20°C.

EFFECT: increased degree of Nb₂O₅ and Ta₂O₅ extraction into extract, raised processability of procedure.

2 cl, 4 ex