... 3.Auto control,stable operation 4.good for environmental Working Principle of Superfine Ball Mill Production Line LHM: 1. Material ... different materials, so as to guarantee the purity and whiteness of finished products.6. Scientific machine structure enables a ... : calcite, marble, limestone, kaoline, gesso, barite, coal ash and slag, etc.(2) Hard materials: carborundum, brown corundum, superfine ...