Best Quality And Factory Supply Magnetite Iron Ore Powder For Sale Magnetite filter material is dark brown granular, do not contain toxic and harmful substances, is an essential material for three layers of filter material filter. Specific gravity of 4.5 g/cm3, capacity of 2.95 g/cm3 English hardness of 5.5 to 5.6.Magnetite filter material is made by our factory by 40-42% of the magnetite iron selected, and it has a fast filter, sewage capability is strong, high mechanical strength, use cycle is long, etc. Applicable to tubular resistance water distribution system, usually in the three layers of filter material with anthracite, quartz sand filter material, is China's current good ingredients program. It belongs to the heavy filter material, backwash when not supporting layer and mixed layer, to improve the water distribution system has a good ability to adapt. Its filter speed can reach 30 to 40 m /, is essential in multi-layer filter material, in addition, its iron, manganese, oxygen removal effect is very obvious.