Abstract: The TiO₂ grade of a sloping ilmenite ore in Jiangsu Province is 2.63%. The ilmenite is fine in grain size， mineral composition is complex and high clay content. In order to develop and utilize the ore resources， based on the research of process mineralogical properties， the comparison test of gravity separation pre-separation process and the magnetic separation pre-separation process were first carried out， compared with the gravity pre-separation process， magnetic pre-separation process has large yield of tailings and low loss rate of TiO₂. The magnetic pre-separation concentrate was subjected to two stage grinding-stage magnetic separation test， at first stage grinding fineness is 60% passing 0.076 mm， second stage grinding fineness is 90% passing 0.076 mm， the grade of TiO₂ is increased from 6.78% to 14.53%. The second-stage high intensity magnetic concentrate is separated by spiral. Gravity concentrate with sulfuric acid as pH adjuster， oxalic acid as inhibitor， sodium silicate as dispersing agent， and MOH as collector， via one roughing four cleaning one scavenging closed circuit flotation process， titanium concentrate with TiO₂ grade of 48.26%， the recovery rate of 13.69% was obtained. Above all， via high intensity magnetic pre-separation-pre-separation concentrate two stage grinding stage magnetic separation-spiral gravity separation on magnetic concentrate-gravity concentrate flotation combined beneficiation process， titanium concentrate with TiO₂ grade of above 48% can be obtained. The test results can provide reference for the development and utilization of slope alluvial ilmenite ore.

Key words: Ilmenite ore, Pre-separation, Magnetic separation, Gravity separation, Flotation