Under the normal working condition of the ball mill, the ball mill runs from 720h to 3000h (according to the working conditions, and the specific time is agreed by both the supplier and the buyer).  

The consumption of the grinding balls is calculated according to the following formula (C1):

M — ball consumption of casting grinding ball (g/ton);

Q — The quality of the grinding balls in the initial ball mill, t;

Q’ –— normal operation to add the quality of the grinding ball, t;

Qh –– The mass of the reusable grinding ball, t;

N — Total mass of material input in the grinding process equipment, t.

(NOTE: NATIONAL STANDARD OF THE GRINDING BALLS IN CHINA SERIES WERE TRANSLATED FROM THE CHINESE VERSION TYPE-GBT17445-2009, the copyright belongs to General administration of quality supervision, inspection and quarantine of China  & Standardization Administration of China)