Method of upgrading tantalum and niobium concentration in slags

Details Method of upgrading tantalum and niobium concentration in slags Method of upgrading tantalum and niobium concentration in slags

1975-07-09

1976-08-03

Ozaki, G.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75101BE, 75121, 423 68, C22B 3424

Patent

active

039727106

ABSTRACT:
In a method for upgrading the concentration of tantalum and niobium in slags and residues by treating the slags or residues or ore with hydrofluoric acid or a mixture of hydrofluoric acid and sulfuric acid to dissolve the tantalum and niobium and extracting the tantalum and niobium from the resulting solution with a ketone to obtain the said elements and a spent acid, the improvement comprising first treating the slags, residue or ore with spent acid containing hydrofluoric acid and/or silicofluoric acid before the dissolution step.

REFERENCES:
patent: 2972530 (1961-02-01), Zimmerley et al.
patent: 3300297 (1967-01-01), Fields
patent: 3447894 (1969-06-01), Gustison et al.
patent: 3585024 (1971-06-01), Cenerazzo et al.

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