1results about How to "Avoid over-crushing" patented technology

The utility model relates to calcium carbonate grinding technical field, concretely is vertical mill grinder grinding device of two -stage grinding, grinding assembly includes grinding bucket, the fixed screw is annular array distribution at the outer wall of grinding bucket. The vertical mill grinder grinding device of two -stage grinding, the calcium carbonate that needs to polish is placed in the grinding bucket through the feed inlet, and the rotation of the rotating disc is driven through the external motor simultaneously, makes the calcium carbonate in the grinding bucket constantly through the polishing piece and the polishing roller and rotates, in the process of rotating, the calcium carbonate is constantly polished and makes it gradually moves back, and the polishing roller is circular truncated cone, the calcium carbonate is smaller and smaller in the process of constantly moving back, the polished calcium carbonate powder is accumulated at fixed disc no.