Study on screening kinetics of coal 6 mm classification
To explore the relationship between the 6 mm classification efficiency and time,the parameters of the dynamics models of＜6 mm and＞6 mm size were fitted by regression analysis method,and then the formula for calculating the sieving efficiency was obtained.The fitting accuracy of the model was judged by standard deviation and correlation coefficient.The results show that the error of actual and calculated normal ratio of＜6 mm particle size is large,with the maximum error exceeding 10％.The error of actual and calculated normal ratio of＜6 mm particle size is small,and the maximum error is less than 0.5％.The error between the calculated and the actual screening efficiency is mainly determined by the error of the size matching ratio＜6 mm.
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