Users must consider when choosing iron remover is conveying belt transmission, bandwidth, belt speed, Angle, material properties, humidity, particle size, thickness, material of how much iron, granularity, properties of ferromagnetic material, in addition to iron requirements, using the environment (temperature, humidity, dust, with or without corrosion, etc.), the properties of the iron remover itself, the location of the installation, and space size, etc. When the iron content of the material is more, should choose continuous automatic iron removal electromagnetic iron remover, when the iron content of the material is less, should choose artificial iron unloading suspension electromagnetic iron remover, permanent magnet iron remover. When the ferromagnetic material in special little, the selection of metal detector and strong magnetic self-discharging electromagnetic, permanent magnet iron removal device matching use, automatic monitoring automatic iron removal, with energy saving, long life, iron removal effect is good. In the use of suspended electromagnetic, permanent magnet iron remover, such as material too thick can be used with no magnetic parallel roller, improve the removal rate. The suspension height can also be lowered appropriately to achieve the ideal iron removal effect.