Patent ID: 8888027
Filing Date: 2014-11-18
Classification: B02C

Abstract:
1. A conical impact mill comprising a rotor assembly rotationally mounted in a tubular housing, the tubular housing having a right frustoconical grinding surface coaxially aligned with the rotor assembly, the rotor assembly having at least two axially spaced rows each comprising a plurality of impact elements that are circumferentially spaced and that define an annular grinding gap between the plurality of impact elements and the right frustoconical grinding surface, and the tubular housing having an inlet for a feed to be comminuted in the conical impact mill and an outlet for a comminuted feed, wherein the plurality of impact elements provide, or are adjustable to provide, a radial dimension of the annular grinding gap that is not constant in one or both of an axial dimension and a circumferential direction.