DRUM MILL Russian patent published in 1999 - IPC

FIELD: hard matter disintegration. SUBSTANCE: drum mill includes rotary housing and lining having set of identical plates of elastic material mounted with interference in inner surface of housing along it for forming wavy working surface. Each plate has trapezoidal cross section. There are grooves between plates passing along housing. Number of grooves is equal to number of lining plates. Each plate may have cross section in the form of isosceless trapezium for forming symmetrical wavy working surface of mill. Each plate may have cross section in the form of non-isosceless trapezium or in the form of wedge. All plates of set are mutually oriented in such a way that wedge thickness increases to one side for forming asymmetrical wavy working surface. Each lining plate may have row of parallel wedge-shaped grooves whose widened portions are turned to one side. Each lining plate may have row of mutually parallel wedge-shaped grooves whose widened portions are turned to thickened portion of lining plate. EFFECT: enhanced efficiency of grinding. 5 cl, 5 dwg