... Mill is used to grind materials in the fields of construction, mining, metallurgy and chemical industry. The ... . Examples of the materials are: quartz, feldspar, barite, fluorite, dolomite, garnet, carborundum, bauxite, zircon, marble, calcite, iron ore, rock phosphate ... , coal, ceram, slag and so on (400 kinds of materials). The materials should have ...