Research on new magnetic roller for magnetite preselection with discarding tailings

That magnetite preselection with discarding tailings can effectively improve the grinding ore grade, which reduces the production costs, so we designed a kind of new magnetic roller. The magnetic separator is constituted by several modular magnetic rollers, whose magnetic system with fan-shaped and annular magnet, Considering magnetic field strength and magnetic depth, this paper manufactured a small prototype based on characteristic theory of magnetic field, then had an experimental study on lean magnetite of Baiyunebo West Mine. Through the discarding tailings test, TFe grade increase 8 percentage points, tailings grade is less than 13%, and tailings cast rate is 56%.