MILL Russian patent published in 2015 - IPC B02C17/14 B02C17/18 

FIELD: process engineering.

SUBSTANCE: claimed mill can be used for grinding of hard materials in construction, chemical industry, metallurgy and agricultural production. Mill body (1) is resiliently mounted at bed (5) and provided with the drive. The body is shaped to a square with curvilinear helical surface with curvilinear pockets arranged over inner diameter. Said body is composed of rigidly connected alternating four hollow sections. The latter are composed of a hollow circular sector with four hollow rectangular sections. Four sections are made of the strip to make different-size quadrangles. The latter have two parallel flexure lines equally spaced apart and parallel with each other. Said strip is twisted to the ring-subsection. Curvilinear pockets are arranged in perimeter subsection. Subsections are connected by free sides by said quadrangles to make a hollow circular sector to compose of said inner and outer surfaces. Subsection surfaces are oriented in one direction at acute angle to the axis of sector of helical lines and helical inner pocket-shape curvilinear surfaces. Said pockets differ in shape and size. Distance between flexure lines equal the sum of perimeters of pockets of inner and outer surfaces. Four sections are made from the strip by bending over straight lines at the angle to strip edges. The strip is coiled to cylindrical turns to make helical lines and curvilinear pocket-shape helical surfaces of semicircular shape.

EFFECT: higher efficiency and enhanced performances.

14 dwg