Ball Mill 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 recirculated back into the mill to be reduced. Various classifiers are used for classifying the discharg from ball mill. 

such as spiral classifier in wet type ball mill,   the cyclones and air classifiers in dry type ball mill. Ball mill is an efficient tool for grinding many materials into fine powder. The ball mill is used to grind many kinds of mine and other materials, or to select the mine. It is widely used in building material, chemical industry, etc. There are two ways of grinding: the dry process and the wet process. It can be divided into tabular type and overflowing type according to different forms of discharging material.

Ball mill machine is parimary used for fine grinding. It is the key equipment for recrushing the materials.

Materials out of crusher need to go into Ball Mill for further grinding. It is widely used for the dry type or wet type grinding of all kinds of ores and other grindable materials in cement, silicate product, new building material, refractory, fertilizer, black and non-ferrous metals and glass ceramic industry. The ore grinding methods of ball mill include dry type and wet type.  When wet type Ball Mill works, a certain amount of water and other liquid will be added into the raw materials to increase its flowability, thus the capacity is increased. When dry Ball Mill works, dust collector device is needed at the outlet of Ball Mill to collect the flying dust.