Analysis on the difference of coal quality indexes of different particle sizes of fine lump coal undersize powder and discussion on its application
In order to analyze the particle size distribution characteristics of the fine coal stack under the Guoneng fine block screen and the differences in coal quality of different particle size components,according to the basic principle of coal particle size screening,through the layered sampling and particle size screening of the fine block coal stacked after automatic screening,and the analysis of different particle size coal quality in each layer,the particle size distribution of each layer under the screen,changes in main coal quality indicators and coal quality of each layer are analyzed.From the experimental results,it can be seen that the proportion of particles with a particle size of over 13mm in the bottom layer of the sieve exceeds 70％.The coal in the lower layer has low total moisture,low ash content,high calorific value,and relatively good quality;As the particle size decreases,the total moisture gradually increases,the ash content first decreases and then increases,and the calorific value first increases and then decreases.The above research provides data support and theoretical guidance for solving the differences in the quality of coal discharged from each batch of undersize powder coal and meeting users'needs for uniformity of undersize powder coal quality.
NETL
NSTL
万方数据
维普
