DEVICE FOR MATERIAL GRINDING Russian patent published in 1996 - IPC

FIELD: chemical engineering. SUBSTANCE: working members 5 and 5′ in the form of horizontal plates with cleaning members are movably fastened along helical lines on vertical shaft 4 inside axisymmetric housing 1. Stationary working members are fixed between adjacent movable ones along helical lines on the inner wall of housing. The direction of rising of helical line of upper group of working members is contrarily to that of their lower group. There is space between upper and lower groups of working members. EFFECT: enhanced efficiency of material grinding and mixing. 3 cl, 3 dwg