PROCESS OF FLOTATION OF FINELY DISPERSED NIOBIUM ORES Russian patent published in 2003 - IPC

FIELD: mineral dressing. SUBSTANCE: flotation of finely dispersed niobium ores involves: conditioning of pulp with ionic composition regulators, modifiers, anionic collector, sulfonol-stabilized pin oil emulsion as frothing agent; isolation of niobium materials into froth product; and its cleaner flotation consecutively in alkali and oxalic acid-created acidic media. According to invention, in conditioning step, cationic collector is also added at its weight ratio to anionic collector from 1:7 to 1:10 and cationic collector and sodium hexametaphosphate are further introduced into cleaner flotation at cationic collector/sodium hexametaphosphate/oxalic acid weight ratio between 1: 1.25: 10 and 1:1.5:15. As cationic collector, Flon-A and primary C17-C20-amines or ANP-14. EFFECT: increased recovery of niobium. 4 cl, 1 dwg, 1 tbl