Research on crushing mechanism and separation characteristic of ZGM coal mill

Abstract

The holes of ZGM95 coal mill in coal-fired power plants have been firstly drilled in China to collect the coal samples from various points in the separator under the different operation condition. The material property is analyzed by the float-sink test and the sample size distribution. The circulating rate and material flux of the separator and cone zone are calculated by the mass balance models of circulating load. Moreover, the influence rules of the mill coal feed, air quantity, hydraulic loading force and coal property on the circulating rate and internal material distribution are discussed by the quantity and quality balance. The circulating rate and input material flux of the separator and cone zone all increase with the mill air quantity