Abstract: The main iron minerals of an iron ore abroad are hematite and magnetite, and the content of harmful impurities sulfur and phosphorus is low. In order to make efficient use of the iron ore resources, experimental research was carried out. The results show that the iron concentrate with yield of 55.98%, iron grade of 65.26% and iron recovery of 74.40% can be obtained by using stage grinding-stage high intensity magnetic separation process, and the separation index is good. At the same time, the tailings produced by grinding and separation can also be classified into a variety of by-products for building materials. While completing the effective recovery of iron minerals, the resource utilization of tailings is realized, which provides a reference for the efficient utilization of similar ore resources.

Key words: hematite, magnetite, stage grinding, high intensity magnetic separation