Abstract: In the iron increase and silicon decrease project of Benxi Iron & Steel Co.，magnetic separation columns were successfully used in BenSteel's two large concentrators，Nanfeng and Waitoushan，helping realize the goal of a final iron concentrate containing over 68.5% iron and below 4.5% silicon.The practice shows that the magnetic separation column can effectively remove the intergrowths and free gangue particles in magnetic agglomerations and is the first choice equipment for obtaining a high grade concentrate in the “iron increase and silicon decrease” project.

Key words: Magnetite, Iron increase and silicon decrease, Magnetic separation column