FIELD: metallurgy.
SUBSTANCE: invention refers to material grinding, particularly to grinding of ore material extracted. Device includes a couple of upstream rollers which can perform intermittent rotation and form gap between rollers for material loading, reduction to the first particle size range and extrusion of reduced material from the gap; a couple of downstream rollers with a gap between them for reduced material obtainment from upstream roller couple and additional reduction to the second particle size range; and transition channel from upstream roller couple to downstream roller couple, holding reduced material transmitted from upstream to downstream roller couple and restraining material transmission so that reduced material from upstream roller couple is loaded to downstream roller couple as the material is transited to downstream roller couple during device operation.
EFFECT: improved quality of material processing, simplified structure of device.
32 cl, 1 dwg
