Abstract: The separation test of -3.2mm V-Ti magnetite ore ultra-finely crushed by HPGR was carried out with the process of parallel separation of Fe and Ti. The effect of high-intensity magnetic separation on ilmenite was investigated. When the crushed ores with grind fineness of -74μm accounted for 80%， the liberation degree of the product crushed by HPGR increased by 0.58% and the number of iron oxide in the ores with fineness of -19μm+11μm decreased by 1.38%， compared with that by Jaw crusher. The TiO₂ recovery could increase by 5.11% and the content of the product with -19μm could reduce by 2.62% in high-intensity magnetic concentrate， compared with the product crushed by Jaw crusher and separated by the process of stage-grinding and stage-separating. The force analysis on ilmenite with different sizes in the separation space show that， as the particle size decreases gradually， the specific resistance on ilmenite increases sharply and the specific magnetic force reduces， so ilmenite particle is more difficult to be captured by magnetic field. The process of parallel separation of Fe and Ti can reduce the amount of newly formed micro-fine ilmenite in the separation， improving the performance of high-intensity magnetic separation of ilmenite.

Key words: parallel separation of Fe and Ti, micro-fine ilmenite, high-intensity magnetic separation, recovery, magnetic property