Abstract: Magnetic roasting, low intensity magnetic separation mineralogical research was conducted in order to find a suitable way to develop and utilize a limonite in Guizhou. The results show that with the 8% dosage of coal powder, roasted at 850 ℃ for 60 min, roasted products grinding at fineness of 75% passing 0.074 mm, with intensity of 151.27 kA/m for low intensity magnetic separation, through one roughing, one cleaning, one scavenging, middles back to the flowsheet in turn process, iron concentrate with iron grade of 61.14%, iron recovery of 89.80% was achieved.

Key words: Limonite, Magnetic roasting, Low intensity magnetic separation