Abstract: A limonite ore in Guizhou is a kind of low-sulfur and low-phosphorus limonite ore with iron grade of 47.14%.Main iron minerals of the ore include limonite，lepidocrocite,psilomelane,pyrolusite and minor pyrite.Limonite was distributed in irregular colloidal and earthy states，and closely associated with gangue minerals.It′s difficult to effectively separate gangue minerals from valuable minerals through grinding process，and even easy to be slimed.Therefore ideal separation index can hardly achieved through direct high intensity magnetic separation or gravity concentration.In order to explore the limonite ore，beneficiation tests were carried out through the process of magnetic roasting-magnetic separation.The results showed that with the mass ratio of anthracite（2～0 mm） to coarse ore samples（3～0 mm）5%，iron concentrate with Fe grade of 66.23% and Fe recovery of 97.53% was obtained respectively at roasting temperature of 850 ℃ for 40 min，with the grinding fineness of the roasting products 97.5% 0.074mm，and magnetic intensity of mid-magnetic separation 218.95 kA/m.

Key words: Limonite, Magnetic roasting, Magnetic separation