TY  - JOUR
PY  - 2022//
TI  - Experimental study on sieving phenomenon and particle size distribution characteristics of coal particles
JO  - China safety science journal (CSSJ)
A1  - Liu, Q.
A1  - Liu, Y.
A1  - Du, K.
A1  - Zheng, S.
A1  - Zhu, Z.
SP  - 130
EP  - 138
VL  - 32
IS  - 2
N2  - In order to investigate influence of mean particle sizes on the calculation of coal's physical property parameters, screening phenomenon and particle size distribution of coal particles at five fractions were studied. Then, with solution of coal gas diffusion coefficient as an example, effects of arithmetic mean and volume-weighted mean volume particle size on calculation results were analyzed. The results show that special separation phenomenon occurs during screening process of coal particles, and distribution of target fractions only accounts for 33. 37%--49. 32% of real size distribution. And arithmetic mean makes all sieved particle sizes within the target fraction, which causes a large error in calculating the diffusion coefficient. Compared it with the volume-weighted average volume size which considers characteristics of particle size distribution, the difference of diffusion coefficient between the two solutions is up to 43. 42%. © 2022, Editorial Department of China Safety Science Journal. All rights reserved.<p /> <p>Language: zh</p>
LA  - zh
SN  - 1003-3033
UR  - http://dx.doi.org/10.16265/j.cnki.issn1003-3033.2022.02.018
ID  - ref1
ER  -