Abstract: In order to make use of the siderite resources in Guanyingshan district of Guizhou province, the beneficiation tests of gravity separation-high intensity magnetic separation and the magnetic roasting-low intensity magnetic separation on this ore is carried out. The results showed that only the process of gravity separation and magnetic separation can not obtain the qualified iron concentrate. Under conditions of roasting temperature at 850 ℃ for 60 min, the dosage of reducing agent of 4%, the final grinding fineness of -325 mesh 80%, and the magnetic intensity of 150 mT, iron concentrate with Fe grade of 64.41%, S and P content of 0.19% and 0.024% and Fe recovery of 87.41% were obtained by the process of magnetic roasting-two-stage grinding-two-stage low intensity magnetic separation for Guanxinshan siderite ores.

Key words: Siderite, Gravity concentration, High intensity magnetic separation, Magnetic roasting-low intensity magnetic separation