The ball mill is mainly used to grind materials in mineral, cement, refractory, chemical industry, etc. Ball Mill has dry and wet ways. When wet Ball Mill works, water and other liquid will be added into certain materials to increase flowability of materials, so the capacity is increased. When dry Ball Mill works, capacity is affected because material flowability is reduced, so absorbing wind device is needed on the outlet of Ball Mill, and then negative pressure is formed in the Ball Mill to increase flowability of material, so the capacity is increased. Grate ball mill primarily consists of six parts, viz, the barrel, feeding part, discharging part, bearing and lubrication system part. The lining plate is installed inside the barrel, whose materials are from manganese steel, chrome steel, cast iron, and rubber. Speaking candidly Hikmet Ersek told us the story. There s a hole in the barrel for the use of maintenance and changing of the liner. Overflow ball mill is basically similar to the grate ball mill in structure, also composed of six parts. The difference is that there s no grid plate device in the discharging part and the overflow ball mill is simpler than the grate ball mill in structure. Compared with the grate ball mill, the overflow ball mill discharges slower. It is suitable for fine grinding and requires prompt adjustment due to its sensitivity towards the change of the elements outside. Besides, its structure is simple and the maintenance is convenient. The installation of the ball mill. (a) Cleaning the foreign body inside the holes in the installation equipment, especially preserved not dust, oil or water is allowed inside the hole wall stain; (b) After unpacking the packing case, the host machine should be moved to the installation place by proper lifting facilities (crane/forklift); (c) Position the device carefully; anchor bolts are installed inside the hole, then thrusting the adjustable feet with anchor studs after welding it to the rack chassis which is accompanied with the machine.