1, Grinding machine which use steel ball (section) of less than 60 mm diameter can use magnetic lining board, for example, Iron ore, copper, lead, zinc and other ferrous and non-ferrous ore, gold and other precious metals mining all can be used, but life is different. Service life of magnetic liner is 6-10 times of manganese steel liner. In addition, depending on mill diameter, thickness of the magnetic liner will change accordingly. 2, Depending on the needs of users, such as different ball diameters, materials handling different nature, Gaodete design different sizes of magnetic liner, fully meet the various needs of the concentrator. 3, The life of magnetic liner in iron ore dressing plant can be more than eight years, in a non-iron ore dressing plant is 6 to 8 years generally, even the hard grind ore is about 4 years (in this case, the manganese steel liner is only about 4 to 6 months). So overall, the magnetic lining board life is is 6-10 times of magnetic manganese steel liner. 4, Magnetic liner can be used for large-scale blast furnace below 300 degrees roof distributor.