ball mill: 1,payment: T/T , L/C 2,loading port:Qingdao ,Shanghai 3,delivery time: within 10 days after receive money. Grinding Mill Main Application:are generally used to grind material 1/4 inch and finer, down to the particle size of 20 to 75 microns. To achieve a reasonable efficiency with ball mills, they must be operated in a closed system, with oversize material continuously being ...