Abstract: A high-phosphorus oolitic hematite minerals in Guizhou province, embedded in fine particle size. The hematite particle size are less than 10 micron observed by microscope, and the oolitic structure with no obvious nuclear or gangue mineral nuclear appeared. The beneficiation tests on this iron ore were carried out. The results showed that the traditional beneficiation method can not effectively separate the ores. And through the magnetic roasting-magnetic separation process, an iron concentrate with 55.74% Fe grade and 57.11% Fe recovery could be obtained, however, the content of phosphorus are high up to 0.258% in iron concentrate. The iron concentrate obtained by magnetic roasting-Magnetic separation was leached by sulphuric acid. Then, the P grade was decreased to 0.065%, Fe grade was increased to 57.73% with a 50.81% total recovery.

Key words: Oolitic hematite, Magnetic roasting-magnetic separation, Dephosphorization by acid leaching