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

Abstract

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.
Keywords: average weighted initial parameters of slurry, solid concentration, speed of its introduction
into a pipe, critical speed, lamination by fineness, near-mesh grain, fall diameter.