DEVICE FOR HYDRAULIC CLASSIFICATION Russian patent published in 1999 - IPC

FIELD: mining, chemical and metallurgical industries; agriculture. SUBSTANCE: device has box with bottom inclined towards unloading, sifting surface positioned in box, pipeline, corrugated tray placed under sifting surface with variable clearance in direction of unloading, loading and unloading appliances. Loading appliance is made in the form of narrowing cone with at least four antipodal curvilinear guides. Inlet hole of narrowing cone and sifting surface holes are symmetrical, and relation of areas of smaller and larger bases of cone makes up 1/5-1/7. EFFECT: higher efficiency of classification. 2 dwg