Abstract: Aiming at a large alkaline granite type tantalum niobium zirconium deposit with characteristic of complex ore chemical composition, fine dissemination size of useful mineral, poor dissociation of useful minerals and gangue mineral, fine grinding - desliming - bulk flotation of tantalum and niobium, zirconium was used to process this ore.A bulk concentrate with 9.43% of Nb₂O₅ and 24.95% of ZrO₂ and 0.36% of Ta₂O₅ with a recovery of 77.66% Nb₂O₅ and 76.70% ZrO₂ and 75.13% Ta₂O₅ was obtained by closed-circuit test from the raw ore with grade of 1.17% Nb₂O₅ and 3.12% ZrO₂ and 0.046% Ta₂O₅.

Key words: Tantalum niobium zirconium ore, Fine dissemination, Fine grinding, Desliming, Bulk flotation