FIELD: process engineering.
SUBSTANCE: invention relates to materials crushing means. Proposed grinder comprises two counterrotation milling discs. Said discs are fitted on single shaft to make milling zone between their work surfaces and annular clearance to discharge finished product. Work surface of every disc has recesses separated by radial webs. Outer surfaces of said webs are located on conical geometrical surface. Width of discharge clearance is selected to make material particle lose abrasive properties.
EFFECT: ruled out effects of milled material on grinder components.
2 cl, 4 dwg
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