Ball mill is an important kind of equipments for the secondary grinding .After the material entering the hollow axis by the feeder, the material will be taken evenly and spirally into the first warehouse, where there is the ladder liner or the ripple liner with the different steel balls. When the tube structure revolving produces the centrifugal force, the steel balls will be carried higher to some extent, and then centrifugal force, the steel balls will be carried higher to some extent, and then fall down to strike and grind the material, After grinded generally in the first warehouse, the material then will be taken into the second warehouse, in which there is the flat liner, the material will be regrind and then be discharged through the discharge grate liner.

It is widely used for the cement, the silicate product, new type building material, fire-proof material, chemical fertilizer, black and non-ferrous metal, glass, ceramics and etc. Two kinds of process methods: wet process or by dry process are both available.