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Keywords = three-phase foam slurry backfill (TFSB)

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19 pages, 10842 KB  
Article
CFD Simulation of Pipeline Transport Properties of Mine Tailings Three-Phase Foam Slurry Backfill
by Xin Chen, Jian Zhou, Qiusong Chen, Xiuzhi Shi and Yonggang Gou
Minerals 2017, 7(8), 149; https://doi.org/10.3390/min7080149 - 17 Aug 2017
Cited by 32 | Viewed by 6351
Abstract
A three-dimensional backfill pipeline transport model is developed using the computational fluid dynamics (CFD) technique, which is applied to study the pipeline transport properties of three-phase foam slurry backfill (TFSB). Based on rheological property tests and CFD simulations, the foam phase, pressure, and [...] Read more.
A three-dimensional backfill pipeline transport model is developed using the computational fluid dynamics (CFD) technique, which is applied to study the pipeline transport properties of three-phase foam slurry backfill (TFSB). Based on rheological property tests and CFD simulations, the foam phase, pressure, and velocity in the pipeline system are investigated using the CFD mixture method for different bubble volume fractions and bubble diameters. The simulation results indicate that TFSB can maintain a steady state during pipeline transport, experience a markedly reduced pipeline transport resistance, and exhibit better liquidity than conventional cement slurry. Furthermore, as the bubble volume fraction increases, the resistance of the pipeline decreases and the fluidity improves. By contrast, the bubble diameter has little effect on the transport properties of TFSB. The combined results of CFD simulations, slump tests, and strength tests indicate that, when the bubble volume fraction is 15–20 vol %, TFSB can satisfy the necessary strength requirements and exhibit self-flowing transport. The CFD technique provides an intuitive and accurate basis for pipeline transport research and has the potential for wider application in studies of mine backfill. Full article
(This article belongs to the Special Issue Minerals in Mine Wastes: Contributions to the Circular Economy)
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