In addition to the iron bar magnet box is made of super rare earth permanent magnet NdFeB magnet as the source, and the electromagnetic iron removing machine can be compared to save power consumption; using a bar magnet magnetic sorting super small iron impurities, so as to protect a flotation equipment and improve the effect of material purity. Can be customized 3 layer, 5 layer, 8 layer, 12 layer bar box. The magnetic intensity of the magnet, above the surface magnetic field strength up to 25mm diameter 10000 Gauss; iron discharging is convenient, the cylinder layer pull bar, magnetic material adsorbed on the magnetic automatic off; continuous work, gradually pumped iron material can continue to work, do not suspend feeding. Application scope: pneumatic dump box magnetic separator is widely used to remove ceramic, mining, chemical, electronic, food and other industries in iron glaze slurry, micro powder, magnetic material etc.. It is suitable for purification and impurity removal of silicate, feldspar, quartz, aged soil and other non-metallic minerals.