Abstract: In the light of the process mineralogy characteristics of a low-grade magnetite in Yunnan, the process of dry  primary concentration with magnetic pulley-three-stage grinding-five-stage low intensity magnetic separation was determined by the tests to make research on single native magnetite with TFe grade of 19.68% (magnetic iron grade of only 7.57%). Finally, good technical indicators of iron concentrate with TFe grade of 68.07% and recovery of 45.14% (37.16% in raw ore) were obtained.

Key words: Low-grade magnetite, Dry primary concentration, Stage grinding, Magnetic separation