RUBBING OFF FACILITY Russian patent published in 2009 - IPC B03B5/02 

FIELD: mining.

SUBSTANCE: invention refers to facilities for cleaning and concentrating grained materials and can be implemented at preparation for further processing of ores, wherein useful component is either contained in shell, or in nucleus of mineral grains. The rubbing off facility consists of a chamber and of impeller installed on a shaft. An under-impeller cone is assembled on the bottom of the chamber. The lower part of the chamber has a form of a truncated cone with radial ribs arranged on it; notably, height of the cone does not exceed distance from the bottom of the chamber to the upper disk of the impeller. Not less, than to 5% of volume the chamber is filled with granules made out of material, hardness of which is more, than 6 by Mohs' scale. The shaft is made hollow. A circulation pipe is assembled above the impeller.

EFFECT: increased efficiency of rubbing films off surface of grained material.

3 cl, 1 dwg