Analysis of distribution of sand concentration by sizes, their average weighted fineness and the slurry flow rate along the cross-sectional height of a slurry pipeline

The complex analysis on interdependence of a speed of introduction of sand slurry into a slurry pipeline is conducted. The authors have specified: optimal value of interrelation of the speed of slurry introduction into a channel Ʋavg and the critical Ʋcr (parameter k = Ʋavg/Ʋcr); effect of k parameter on the size of the active zone of sand lamination by fineness depending on the particles density value, which comprise the solid phase of slurry; linear dependence of the slurry flow increment velocity as far as it approaches its free surface in the channel. As a whole, these results significantly facilitate the design of tapering channels in the flowchart of the energy intensive technology of sand beneficiation.