Abstract: In order to determine the high efficient development and utilization technology of an ultralean iron ore (TFe grade 14.87%) in Xinjiang,the mineral processing experiment was carried out on the basis of process mineralogy.The results show that the main ironbearing minerals are magnetite,the main gangue minerals are chlorite,quartz,diopside and so on.Iron ore is closely associated with gangue minerals.The concentrate with a yield rate of 15.21%,TFe grade of 66.56% and recovery of 68.11% was obtained by crushing the samples to 5～0 mm by high pressure roller mill after dry magnetic separation,2stage grinding,low intensity magnetic separation and magnetic suspension cleaning,the characteristics of high mineral processing efficiency and low production cost have certain reference significance for the development and utilization of similar ore.

Key words: magnetite ore, highpressure roller mill crushing, stage grinding stage low intensity magnetic separation, magnetic suspension concentrate