Abstract: The main phosphorus-bearing mineral in low intensity magnetic separation tailings of an Iron Dressing Plant of Hebei is apatite. Since apatite minerals are enriched obviously in fine or micro-fine particles, and its degree of liberation are well, it has a comprehensive recovery value. In order to improve the comprehensive utilization of resources, and reduce the potential threats of phosphate ore efflux to the environment, flotation tests of phosphorus concentration for on-site iron tailings samples are carried out. The results show that under grinding fineness of -0.074 mm 48%, phosphorus concentrate with P2O5 grade of 34.65%, and recovery of 88.83% is achieved by adopting the process of one-roughing, two-scavenging, four-cleaning and middles back to the flow-sheet in turn.

Key words: Iron tailings, Apatite, Flotation, Comprehensive recovery