公开(公告)号：US3586249A

公开(公告)日：1971-06-22

申请号：US3586249D

申请日：1967-12-07

申请人： SMIDTH & CO AS F L

发明人： FAGERHOLT GUNNAR R

IPC分类号： B02C17/06 ,  B02C17/20

CPC分类号： B02C17/06 ,  B02C17/20

摘要： A continuous output of very fine grain size mineral material is obtained in a mill grinding operation by initially grinding material to have a residue below 10 percent on a 210-micron screen, then further grinding the material by means of grinding bodies having a maximum middle or average weight of less than 15 grams until a product of a fineness below 1 percent on a 210micron screen is obtained and then the product is passed out of the mill by gravity or overflow through an opening at the outlet end of the mill.