ball mill classification | Henan Deya Machinery Co., Ltd.
3/7/2012#0183;#32;Ball Mill Classification. Ball mills are also classified by the nature of the discharge. They may be simple trunnion overflow mills, operated in open or closed circuit, or grate discharge (lowlevel discharge) mills. The latter type is fitted with discharge grates between the cylindrical mill body and the discharge trunnion. The pulp can flow