AUTOGENOUS MILL Russian patent published in 1999 - IPC

FIELD: milling equipment. SUBSTANCE: autogenous mill has rotating drum whose inner surface is covered with wear-resistant lining. Drum has discharge screen with slit-shaped openings. Wear-resistant lining has lifting members of different height, with minimum and maximum height ratio being proportional to tg β, where β is angle defined by straight line connecting minimum and maximum height members and tangent to drum housing circle. Height of minimum-height member and space between minimum-height members in row of members is equal to maximum size of opening in discharge screen; space between maximum-height members in row of members is triple the height of minimum-height members; space between previous and subsequent rows of members from minimum to maximum height members and between members in each subsequent row is equal to height of previous row members, with number of rows of different height members per lining pitch being at least one. Such construction allows valuable crystalline component to be kept. EFFECT: increased efficiency in milling process and improved quality of product. 3 dwg