Ball mill can be used in the field of cement, refractories, chemicals, nonferrous and ferrous metals and other mining department, which can be used as the various anti-abrasion materials .Among ball mill, the raymond Ball Mill are mainly applied to crush the barite, limestone, ceramic, slag with the Mohs hardnes of less than 9.3 degree and the super thin powder process of over 280 materials in the non-flame and explosive field of mining ,metallurgy , chemics with the moisture of lower than 6%. And the final particle size can be adjusted at the range of 60-325monyh and some materials can reach the extreme high degree of 500monyh.The ball mill is key equipment for regrinding. Ball mill is widely used in the mining, new type building material, glass, ceramics and etc. According to different forms of discharging materials, ball mill can be divided into tabular type and flowing type .And there are two ways of grinding of ball mill: the wet process and the dry process. The wet process of ball mill means that the materials are grinded with water, while the latter not.Ball mill is made up of feeding part, discharging part, gyre part, transmission part (decelerator, small transmission gear, generator, electrical control) and so on .The hollow axis of ball mill adopts the cast steel and the rotary big gear of ball mill is processed from cast rolling gear .The barret body of ball mill wears well and bears wearable scale board.