Hydraulic Mineral Waste Transport and Storage

Pullum, Lionel; Boger, David V.; Sofrà, Fiona

doi:10.1146/annurev-fluid-122316-045027

Cited by 49 publications

(32 citation statements)

References 49 publications

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“…The stratification can have significant effects on scale‐up. A comparison of pressure gradient prediction was conducted in Reference 3 for a non‐Newtonian suspension (

30 %

v/v) using both homogeneous and fully stratified suspension models. The homogeneous model predicted the pressure gradient varied inversely with the pipe diameter, while the layer model predicted the pressure gradient was independent of the pipe size and produced a fully stratified curve.…”

Section: Introductionmentioning

confidence: 99%

Dense non‐Newtonian suspension flow: Effect of solids properties and pipe size

et al. 2022

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High concentration tailings transport is a promising approach for improving the safety and environmental impact of mining tailings disposal. High concentration suspensions exhibit complex non‐Newtonian behavior. The interaction between the non‐Newtonian carrier and the coarse particles is still poorly understood, particularly in the turbulent regime. This article considers the effect of solids concentration, particle and pipe size on transport characteristics in a weakly turbulent non‐Newtonian suspension using a DNS‐DEM methodology. Heterogeneous flow and a sliding bed are presented in the turbulent regime, with particles being more suspended in a small pipe. Although stratification is observed, there is no “packed” bed predicted for these cases. The presence of the viscous core region contributes to the dominance of the drag force in the central region in a non‐Newtonian suspension. Non‐Newtonian suspensions can also be transported at a much lower velocity and display a comparable specific energy consumption to a conventional dilute suspension.

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“…The stratification can have significant effects on scale‐up. A comparison of pressure gradient prediction was conducted in Reference 3 for a non‐Newtonian suspension (

30 %

Section: Introductionmentioning

confidence: 99%

Dense non‐Newtonian suspension flow: Effect of solids properties and pipe size

et al. 2022

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“…Thickened or paste tailings usually exhibit a visco-plastic non-Newtonian behavior. They show a yield stress (τ 0 ) and a viscosity (η) that vary with shear rate (γ ) (Pullum et al, 2018). This amount of water can be modified by different ways: sedimentation, consolidation, percolation forces, loading, evaporation and/or drainage, and shearing forces.…”

Section: Introductionmentioning

confidence: 99%

Rheology of mine tailings deposits for dam break analyses

Chácara

Filho

2021

REM, Int. Eng. J.

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This article deals with the rheology of tailings deposits related to dam break analysis. The material used was a fine tailings from iron ore processing. Geotechnical and rheological characterization of these tailings were performed. The rheological characterization consisted of rotational and oscillatory tests. It was observed that the rheological properties depend on material solids content and sample preparation method. Furthermore, the material showed viscous or viscoplastic fluid behavior, depending on the solids content. The results of the rheological tests were used as input in numerical flow simulations using Flow-3D ® software. Failure of a hypothetical tailings deposit was simulated, with different scenarios. Relationships between traveled distance (range, spreading), speed, and time of arrival of the flow wave versus rheological properties were determined. It was found that tailings runs are also strongly influenced by the solids content and deposit stress history (formation), resulting in different flow types ranging from mudflood, through mudflow, and even landslide. A major finding was that in the Flow-3D ® analyses, the deposit volume mobilized, and the output hydrograph are parts of the solution, and not premises or a model to follow (e.g. design breach).

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“…The research on study of drag reduction using wall slip phenomenon has been conducted for a really long time. 10 Lower viscosity fluid has become a preferable alternative for the boundary layer of high viscosity liquids in pipe and has been widely used in many areas for the reason that it can reduce the cohesive energy consumption around the boundary layer effectively. Such as water ring for transporting raw oil in petroleum industry, which converts oil shearing deformation to water shearing deformation can also reduce the resistance.…”

Section: Introductionmentioning

confidence: 99%

Exploiting the drag reduction characteristics of dense pastes transporting in pipe with boundary liquids injection

Lyu

Jiang

et al. 2021

Lubrication Science

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When dense paste transports in pipe, the pressure loss is enormous. To make use of the wall slip phenomenon, different liquids were injected into the boundary layer in horizontal pipe and pressure loss per unit reduces. Through the pipe transportation tests, the effect of different factors to the resistance was analysed respectively, such as the thickness of boundary layer, the concentration of material, the type of drag reducer, the transport velocity and the flow rate. Results show that the drag reduction effect is much better with a higher thickness and lower transport velocity, and also obtains that PEO (Polyethylene oxide) solution as boundary layer is much more effective than water. With analysis of variance and significance test, the influence degree of the three main factors on the transport resistance is sorted as the thickness of the boundary layer, paste concentration, pipe diameter. The thickness of boundary layer has the greatest influence on the transport resistance. All conclusions provide a basis for how to use the boundary layer rationally in engineering paste pipeline transportation system.

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Hydraulic Mineral Waste Transport and Storage

Cited by 49 publications

References 49 publications

Dense non‐Newtonian suspension flow: Effect of solids properties and pipe size

Dense non‐Newtonian suspension flow: Effect of solids properties and pipe size

Rheology of mine tailings deposits for dam break analyses

Exploiting the drag reduction characteristics of dense pastes transporting in pipe with boundary liquids injection

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