silica quartz mill grinding sand 6ut4n 2017-05-21 grinding mills ganesh 2017-11-20 mill shop 2018-05-22 roller mill rock crusher machines 2018-11-20 high quality mining ball mill machine for 2019-05-22 mill faster speed ratio 2019-11-21 ball mill grinding media sizing sam crushers raymond mill 2020-05-22 bola stell untuk ball mill 2020-11-21 If a ball mill uses water during grinding, it is a wet mill. A typical ball mill will have a drum length that is 1 or 1.5 times the drum diameter. Ball mills with a drum length to diameter ratio greater than 1.5 are referred to as tube mills. Ball mills may be primary or secondary grinders.