Abstract: Panzhihua Group Mining Company adopt the “high gradient magnetic separation + flotation” to solve the technology issue of titanium recovery, the recovery of ilmenite below 38μm was extremely low. In order to effectively utilize ilmenite resources and further increase the recovery rate of ilmenite, the effect of new ZQS high gradient magnetic separator on the recovery of ultrafine grade (-38 μm) ilmenite was explored, the flotation condition test and full process test of titanium were also carried out. The results showed that with feeding grade of TiO₂ is 11.47%, -38 μm fraction for 88.89%, via one stage magnetic separation conducted by new-type ZQS high gradient magnetic separator, magnetic concentrate with TiO₂ grade of 20.19%, 83.56% recovery was obtained, of which -38 μm fraction grain recovery is 84.05%. The magnetic separation concentrate was subjected to flotation test. Ilmenite concentrate with TiO₂ grade of 46.80%, and 61.53% flotation recovery was obtained，recovery to run-of-mine ore is 51.41%. ZQS high gradient magnetic separator is very effective in recovering fine-grained ilmenite, especially for -38 μm ultrafine-grained, which has high grade as well as high recovery in the concentrate.

Key words: Ilmenite, -38 μm Ultra fine particle, ZQS high gradient magnetic separator, Flotation