Non-uniform permanent magnetic field metal magnetic liner is used to protect the cylinder, so the cylinder grinding and material directly from impact and friction, but also can be used to adjust the different forms of liner packed grinding media campaign to enhance the crushing effect of grinding materials help improve grinding efficiency of the mill, increase production, reduce metal consumption. Ball mill liners and metal liners produced by Sichuan Gaodete Science&Technology Co., , according to wet and dry mill working conditions, different diameters, respectively, to provide quality ball mill liners to choose to use. Sichuan Gaodete Science&Technology Co., uses magnetic materials undergo a rigorous selection. Based on years of experience, we use the stable performance, reliable quality magnetic materials, thus ensuring the quality of our products. And in some vulnerable parts we added some NdFeB magnetic materials.