Abstract: Decentralized magnetization roasting-magnetic separation was used to recover the iron resources of gold mine tailings with 27.26% Fe. Test was focused on the effect of roasting time, magnetic field intensity and the dosage of dispersant(hexametaphosphate) and flocculant(Oleic acid and kerosene) to concentrate grade and iron recovery. The experimental results indicate that after magnetization roasting under the conditions of 850 ℃, CO volume percentage is 2%, roasting time is 5 min, then proceed low intensity magnetic separation with Magnetic field intensity at 111.44 kA/m, the dosage of dispersant and flocculant is 2.50 kg/t and 5.64 kg/t, a concentrate assaying with 57.15% iron grade and 81.43% iron recovery could be achieved.

Key words: Gold mine tailings, Magnetization roasting-magnetic separation, Iron concentrate