Abstract: The hematite ore from Zhaokua has a low grade and fine dissemination size. The test on the direct reduction-magnetic separation of this ore was made, with H₂ and N₂ mixture in a volume ratio of 1∶4 as the reducing gas. The run-of-mine ore ground to 92% -150 mesh was treated by direct reduction for 70min at 700 ℃ to get a metallization rate of 85.89%. The reduced ore was then finely ground to 3.98 μm on average and separated in a magnetic tube at 63.66 kA/m. As a result, an iron concentrate grading 73.04% at a recovery of 77.28% was obtained.

Key words: Hematite, Fluidized bed, Direct reduction, Magnetic separation