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tribo-charging
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Tribo-charging of binary mixtures composed of coarse and fine particles in gas–solid pipe flow
, Article Particuology ; Volume 43 , 2019 , Pages 101-109 ; 16742001 (ISSN) ; Fotovat, F ; Bi, X. T ; Grace, J. R ; Sharif University of Technology
Elsevier B.V
2019
Abstract
Experiments were conducted to investigate the effect of adding fines on the tribo-charging of coarse glass beads. Four types of fines, i.e., copper, stainless steel, uncoated and silver-coated fine glass beads, mixed with 240–830 μm glass beads were conveyed by air through a stainless-steel spiral pipe acting as a tribo-charger. Regardless of the type or electrical conductivity of the fine particles tested, adding small amounts of fines (up to 10 wt%) to coarse glass beads resulted in a sharp increase in the mass and surface charge densities of the particles. In general, the profiles of the mass and surface charge densities of the fine–coarse particle mixtures as a function of the mixture...