Analysis and generalization of experimental data obtained for the low-velocity (dense-phase) pneumatic transport of finely dispersed materials are used to determine their basic properties exerting a considerable effect on their transportability and the efficiency of pneumatic conveying. The effect of the standard internal friction coefficient of the material on the stable transport conditions is analyzed for different solids loadings and pipeline lengths. The analysis is based on the kinematic viscosity that takes into account the mutual effect of the dynamic viscosity and density of the granular bed on the efficiency of the low-velocity pneumatic transport.
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