COUNTERJET-TYPE MILL Russian patent published in 1995 - IPC

FIELD: grinding equipment. SUBSTANCE: counterjet-type mill with grinding chamber has at least two pairs of ejectors with material feed hoppers and speed-up pipes disposed coaxially in each pair of ejectors and directed in grinding chamber oppositely in relation to each other. Separator mounted over grinding chamber and connected with this chamber by means of vertical stand pipe is provided with chutes intended for returning ungrounded material. Axes of speed-up pipes are located in different levels and are spaced one from the other to a distance not less than inner diameter of speed-up pipe. EFFECT: reduced energy consumption. 2 dwg