Ball Mill by Saraswathi.B - PharmainfoA ball mill consists of a horizontally rotating hollow cylindrical vessel or shell with the length slightly greater than its diameter which is mounted on a metallic frame in such a way, that it can be rotated on its longitudinal axis. The axis of the shell or vessel may be either horizontal or at a small angle to.ball mills in building materials,Ball mills - PSP Engineeringills nts. Two chamber mills are used for grinding cement, slag and similar materials. They are typically arranged in a circuit with high efficiency VTP separators. They grind materials up to 6500 cm2/g according to Blaine. The mill itself is equipped with a lifting armoring in the first chamber with larger balls with a high.