Abstract: There are mainly magnetite and specularite in a refractory iron ore at northwest of China, among which magnetite and specularite, specularite and quartz have a closely disseminated relationship. The technical conditioning tests for grinding and concentration of the ore are carried out. The results showed that low intensity magnetic concentrate with Fe grade of 66.39% and recovery of 40.94% and high intensiy magnetic concentrate with Fe grade of 63.41% and Fe recovery of 37.27% were obtained by the process of grinding-low intensity magnetic separation with one roughing and one cleaning-rough high intensity magnetic separation-regrinding of rough concentrate-cleaning concentration with high intensity magnetic separation. Total Fe concentrate is grading at 64.95% with the recovery of 78.21%.

Key words: Magnetite, Specularite, Low intensity magnetic separation, High intensity magnetic separation