We know that the magnetic separator cylinder is equipped with material to rotate and Jiaozuo magnetic separator. Therefore, the roller type magnetic separator has a better ore unloading effect and a higher grade of concentrate. The working principle is that in the magnetic field of the magnetic separator, under the magnetic and mechanical force, the manganese ore magnetic separator and the different magnetic material are moving in different ways, so as to achieve the magnetic and non magnetic materials in the separation material. Small scale maintenance should be carried out every six months according to its own conditions. The specific maintenance contents are as follows: do not dismantle the gear, the cycloid wheel or the planetary gear, and the supporting and running parts, and replace the cooling lubricating oil. A large-scale maintenance should be carried out every two years. The contents of maintenance include all parts, inspection, maintenance or replacement. The oil of oil immersed electric roller and dry permanent magnetic separator should be used strictly according to the Zhi fixed oil in the instructions of use, wet magnetic separator, the user must not replace any kind of oil in order to prevent the motor from burning.