Abstract: In order to explore the ore process of Beishan Site of Nanfen Open Pit Iron Mine,the process mineralogical research was carried out on the ore.According to the results of the process mineralogical research,three kinds of technological processes are designed for the stage grinding-low intensity magnetic separation-high intensity magnetic separation-magnetization roasting-low intensity magnetic separation process,stage grinding-low intensity magnetic separation-high intensity magnetic separation-reverse flotation process,and stage grinding-low intensity magnetic separation-high intensity magnetic separation-reverse flotation process.Laboratory process tests were carried out,the optimum process stage grinding-low intensity magnetic separation-high intensity magnetic separation-reverse flotation was determined.Satisfaction index of iron concentrate with iron grade over 66%,and iron recovery over 75% was obtained.

Key words: Beishan site ore, Process mineralogy, Roasting, Flotation, Gravity separation