Abstract: The main iron mineral of an iron oxide ore in Yunnan is hematite,the grade of iron is 4226%,but the content of impurity S is higher,that is 196%.The sulfur in the ore is mainly in the form of sulfate,which forms barite with barium.In order to make full use of mineral resources,aiming at the problem of high sulfur content in the ore,the experimental study on desulfurization by mineral processing was carried out.The experimental results show that the iron concentrate containing 014% S and 5278% Fe can be obtained by reverse flotation with one roughing and two cleaning,and the recovery of S is 9286%.The desulfurization effect is better.It provides a technical basis for desulfurization of the ore by mineral processing.

Key words: iron oxide ore,desulfurization,sulfate,reverse flotation