Patent ID: 9211547
Filing Date: 2015-12-15
Classification: B02C,B07B

Abstract:
1. A classifier for separating fine and coarse particles in a fluid flow, comprising: a housing extending along a longitudinal axis between a first end and an opposing second end, the housing including: a body disposed within the housing that defines a chamber between the body and the housing; a vane assembly provided between an outer surface of the body and an inner surface of the intermediate portion of the housing, such that the vane assembly divides the chamber into a first chamber provided between the body and the lower portion and a second chamber provided between the body and the upper portion, wherein the vane assembly includes a plurality of blades aligned at a pitch angle relative to an entrance end of the vane assembly; and an outlet provided at the second end and fluidly connected to the second chamber to allow the fine particles separated from the coarse particles to flow through the outlet after exiting the vane assembly; wherein the reclaim outlet is fluidly connected with the second chamber and a pulverizer to allow the coarse particles separated from the fluid flow after exiting the vane assembly to be directed back to the pulverizer for regrinding; wherein the body includes opposing upper and lower frusto-conical portions; and wherein the lower fusto-conical portion is provided adjacent to the intermediate portion of the housing with the vane assembly therebetween, such that a spacing between the lower frusto-conical portion and the intermediate portion narrows from the entrance end of the vane assembly to an exit end of the vane assembly.