Abstract
Packing density and electrical resistivity of particles assemblies are important factors for a variety of applications of granular materials. In the present work, a three-dimensional imaging technique is coupled with the discrete element method (DEM) to model anode grade calcined coke particles. Three-dimensional DEM models of samples with different size distribution of particles were studied to obtain the inter-particle contact information. As the content of fine particles increased, a higher inter-particle contact density and smaller average contact radius was observed in the samples. Confronting the DEM data and experimental measurements of electrical resistivity showed the simultaneous effects of packing density and contact density. Samples with higher contact density and smaller contact radius in general held high electrical resistivities. However, if increasing the contact density does not modify contacts between large particles, this will have a positive effect on packing density, so a lower electrical resistivity was obtained.
Highlights
Particle packing is an old problem [1] that exists in different applications and industries such as construction, pharmaceuticals, food processing, and agriculture [2]
Packing density and electrical resistivity of particles are both of interest for aluminum production
The present work takes the advantage of those results to study and provide in in-depth understanding of electrical current transfer in the beds of coke particles
Summary
Particle packing is an old problem [1] that exists in different applications and industries such as construction, pharmaceuticals, food processing, and agriculture [2]. The effects of the bulk density of coke aggregates on the air permeability of baked anodes [4]. If the coke aggregate recipe can be modified to have a higher amount of7,coarse particles without compromising the density, the pitch demand for this recipe could. Fine coke particles) is the most reactive part of of DEM simulations in predicting the vibrated bulk density of coke aggregates. Thethe coke aggregate recipe be modified have a higher aluminum industry to [8]. The discrete element method (DEM) has a proven capability [9,10,11,12] of investigating the packing behavior of irregular-shape particles. 17.7 aluminum industry to make −30+50 anodes, and the 0.297–0.595 modified recipe was19.4 investigated for its density and electrical resistivity.
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