PRINCIPLE: Horizontal cylinder rotating device, edge transmission, three warehouse ball mill. Used for open flow grinding system, grinding of different label cement clinker, super fine powder or cement products. The material by feeding device through the hollow shaft spiral evenly into the first storehouse, namely the coarse grinding storehouse, this storehouse (and two warehouse) has high ladder type ring ditch lining board (material is high manganese steel), Larger average diameter of grinding medium is installed inside, cylinder body rotating produces a centrifugal force takes the grinding medium to a certain height and then down, and produces thumping and abrasive for material. The material in the first storehouse reached coarse grinding, through the single segregation warehouse into the second device storehouse, the diameter of grinding medium (ball) in this warehouse is less than first storehouse, and the material is continue to be crushed, and then after arc model choose powder type double screen in the warehouse of the device screening, coarse material to return to the second warehouse, fine particle materials into the third class, that is fine grinding warehouse. Fine grinding warehouse used in ripple lining board (material which is element chilling alloy), inside packs miniature grinding medium-small steel forging. The material in this warehouse by grinding, in order to eliminate far away from the cylinder body parts of the tiny stagnation area and three warehouse were more easily appeared contrary grading phenomenon for grind body, in three warehouse has 3-5 way activation device, further improved the forging of the storehouse grinding efficiency. Qualified products and miniature forging into the discharging device at the same time, through the material ??board realized the forging separation from the material, products of cement discharged by the out-put hollow shaft and eventually finished the grinding out work.