ANNULAR VIBRATORY GRINDER WITH CLASSIFIER Russian patent published in 2003 - IPC

FIELD: rock grinding equipment. SUBSTANCE: annular vibratory grinder has vibration exciter, flexible members, central destructing tool, outer grinding member made in the form of hollow cylinder composed of rings arranged above one another and provided with space for passage of air into working cavity to remove dust-like particles. Rings are fixed in frame for oscillatory displacement around vertical axis. Adjacent rings are interconnected in opposite vibration phase. Internal surface of each ring is made corrugated. Central destructing tool is made in the form of drum with lateral destructing and classifying working surface defined by rectangular rod-like members separated from one another by vertical slots and fixed to drum generatrix on its carcass at an angle to horizontal plane. Drum internal cavity is communicated with suction device through upper end part equipped with branch pipe. Central destructing drum is arranged coaxially inside hollow cylinder and is provided with disk, whose peripheral part has ground ore discharge device. EFFECT: increased efficiency in destructing hard kimberlite ore. 4 dwg