METHOD AND APPARATUS FOR PRODUCING MATERIAL WITH PREDETERMINED MILLING FINENESS Russian patent published in 2003 - IPC

FIELD: milling method and equipment. SUBSTANCE: method involves providing sequential milling of material in at least two vibratory mills arranged one above another, with material being classified in each mill by means of perforated partition wall mounted in discharge branch pipe; dividing material into at least two flows in each discharge branch pipe. Apparatus has frame, at least two milling chambers with milling bodies arranged one above another and communicated with one another through discharge branch pipes. Perforated partition wall positioned at outlet end of each milling chamber in discharge branch pipe has openings of predetermined section. Each discharge branch pipe is split into at least two branches and is equipped with gate for changing direction of material flow. EFFECT: increased efficiency and provision for obtaining material of predetermined milling fineness. 3 cl, 4 dwg