Ball mill SUPER ORION S.O.

horizontalcoarse powderdry milling

Ball mill for the dry comminution of hard materials, especially for the ultrafine range < 10 µm in circuit with an Alpine ultrafine classifier Grinding drum supported in water-cooled, oil-lubricated journal bearings Grinding drum lined with tungsten carbide wear plates or with silex or ceramic elements when the requirement is grinding without iron contamination Grinding elements dictated by the type of lining Principle of operation Ball mills are giant drums that are filled to between 30 and 40% of their volume with freely moving grinding media - in this case balls. The diameter of the balls is between one and several centimetres to suit the application - smaller balls for fine milling results and larger ones for coarser milling tasks. The drive sets the milling drum into slow rotation and the bed of milling media is thus activated, i.e. the balls are lifted and then impact back against the bed. Ball mills are usually operated below the critical speed. The critical speed is the speed where, mathematically calculated, the grinding media would centrifuge out. A mill of this size equipped with steel grinding media converts approx. 50 kW per m³ of feedstock. The feed product is fed continuously through the trunnion and is discharged through slots on the opposite side. The discharge rate can be adjusted as a function of the number of open slots. The ground product is transported - often pneumatically - and is charged to a downstream classifier. The coarse material is returned to the mill together with the feed product. Features The classic standard design which has proved itself in operation throughout the world for decades.