2DU S W, LIU T C. A rate model for the discharge of pulverized coal from a pressurized aerated-tank[J].Powder Technology, 1989, 57 ( 1 ): 69-75.
3BROWN R L, RICHARDS J C. Principles of powder mechanics [M]. New York: Pergamon Press, 1970.
4BEVERLOO W A, LENIGER H A, van de VELDE J. The flow of granular solid through orifices[J]. Chemical Engineering Science, 1961, 15 (4): 260-269.
5HARMENTS A. Flow of granular material through horizontal apertures [J]. Chemical Engineering Science, 1963, 18 (4): 297-306.
6KOTCHANOVA I I. Experimental and theoretical investigations on the discharge of granular materials from bins[J]. Powder Technology, 1970, 4 ( 1 ): 32-37.
7BROWN R L, RICHARDS J C. Exploratory study of the flow granules through apertures[J]. Transactions of the Institute of Chemical Engineers, 1959,37 (3): 108-119.
8SPRINK C D, NEDDERMAN R M. Gravity discharge rate of fine particles from hopper[J]. Powder Technology, 1978, 21 (2): 245-261.
9NEDDERMAN R M, TU ZI3 N U. A kinematic model for the flow of granular materials[J]. Powder Technology, 1979, 22 (2): 243-253.
10DAVIDSON J F, NEDDERMAN R M. The hour-glass theory of hopper flow[J]. Transactions of the Institute of Chemical Engineers, 1973, 51 ( 1 ): 29-35.
