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Article
Mechanics
Bihara Singh et al.
Summary: A modified version of the Two-Fluid Model (TFM) with a multiphase turbulence model is used to study the flow behavior in a downward gas-solid channel. The modified TFM predicts an enhanced gradient in the particle phase mean velocity close to the wall and shows better agreement with experimental data compared to the conventional TFM formulation. However, both TFM formulations fail to capture the anisotropy associated with fluid phase velocity fluctuations and its effects on the particle phase near the wall.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2023)
Article
Green & Sustainable Science & Technology
Yabin Feng et al.
Summary: Alkali-activated composite cementitious materials made from fly ash (FA) and ground granulated blastfurnace slag (GGBS) can overcome the limitations of single precursor materials. In this study, cemented paste backfills (CPB) were prepared using iron tailings as aggregates, FA and GGBS as binders, and soda residue (SR) and calcium carbide slag (CS) as activators. The effects of varying proportions of FA/GGBS and SR/CS on the workability, mechanical, and microstructural properties of the CPB were investigated. The results showed that the fluidity of the backfilling slurry initially increased and then decreased with increasing FA content, while it increased with decreasing SR content. The unconfined compressive strength (UCS) of the CPB decreased with increasing FA content, but first increased and then decreased with decreasing SR content.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Chemical
Tanuj Joshi et al.
Summary: The present work investigates the effect of different Prandtl numbers on the flow characteristics of slurry in a horizontal pipe. The findings show that the pressure drop increases with an escalation in particle sizes and Prandtl number. Low Prandtl fluid demonstrates relatively higher granular pressure, temperature, and wall shear stress, while higher Prandtl number fluid exhibits maximum specific energy consumption.
Article
Engineering, Chemical
Yidong Guo et al.
Summary: In this study, a three-dimensional transient slurry-pebble numerical model was established based on CFD-DEM coupling to analyze the flow characteristics of slurry shield pipeline system in sandy pebble stratum. The results showed that the critical velocity of pebble varied with particle size and shape, and the pressure drop in the pipeline was influenced by slurry velocity and pipe inclined angle. The migration of large pebbles in the pipeline was observed to occur through sliding, rolling, and jumping, with different patterns for different pebbles in different pipelines.
Article
Engineering, Chemical
Mohsen Sadeghi et al.
Summary: In this study, the transport of three-phase oil sands tailings in a horizontal pipeline was simulated using the mixture multiphase model coupled with the kinetic theory of granular flow. The simulation results showed exceptional agreement with the field data, with errors of <3.5% for velocity distribution and <15% for the pressure drop. It was found that the majority of bitumen droplets reside at the top region of the pipe, which is of great significance for designing an effective process for the separation of bitumen residues.
CHEMICAL ENGINEERING SCIENCE
(2023)
Review
Construction & Building Technology
Shenghua Yin et al.
Summary: Cemented paste backfill (CPB) technology has the potential to greatly improve tailings management in the mining industry, but ensuring proper roof-contact is crucial for personnel safety. The use of expansion agents (EA) in civil engineering can enhance roof-contact for CPB. This paper reviews the development history of CPB technology, identifies the challenges in achieving proper roof-contact, and focuses on the mechanism of expansion-extrusion-bonding. The comparison and analysis of different concrete EA and expansion matrix properties are conducted, and future research directions for expansion backfill technology are discussed.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Metallurgy & Metallurgical Engineering
Leiming Wang et al.
Summary: Segregated pore networks, which are commonly observed in industrial heap leaching operations, have a significant impact on fluid flow and metal leaching efficiency. In this study, three segregated models were defined based on ore feeds and stacking procedures. Micro-computed tomography scanning experiments and image processing algorithms were used to obtain the models. Parameters related to fluid flow were quantified to understand the effects of segregated pore networks. The results suggest that improving fluid flow distribution in heaps requires well-organised construction procedures, controlling particle size distribution, and large-scale studies coupled with non-invasive imaging and flow simulations.
Review
Engineering, Chemical
Haiyue Yu et al.
Summary: This paper summarizes four coping strategies for fluid-solid erosion wear of pipelines: erosion wear modeling, erosion wear detecting, resistance to erosion wear, and erosion wear risk assessment (health management). The current research status of pipeline erosion is analyzed and reviewed from both theoretical and applied perspectives, and the development trend of coping strategies for pipelines' erosion wear is predicted. It is expected that this paper can provide inspirations and valuable references for ensuring the long-term safe operation of pipeline systems.
Article
Engineering, Mechanical
R. J. Chung et al.
Summary: This article reports on recent studies of erosion-corrosion of high manganese steel in slurry transport systems, comparing its performance to commonly used pipeline steels and other materials. The results show that the high strain-hardening capability of high manganese steel results in outstanding erosion resistance, making it more than twice as effective as ferritic steels. The study also compared the results to field trials conducted in an oil sands coarse tailings pipeline.
Article
Construction & Building Technology
Huazhe Jiao et al.
Summary: By using solid waste of metal ore, the influence of slurry concentration and stratification angle on the mechanical properties of backfill samples was tested. It was found that the uniaxial compressive strength decreases with the increase in interlayer inclination in a polynomial function, while it increases with the increase in solid mass fraction. The internal cracks of the layered cemented tailing backfill begin to sprout when the stress reaches 60% of the peak strength, and the crack evolution curve reaches the inflection point when the stress reaches the peak strength. The distribution of fine packing cracks becomes more concentrated and decreases with the increase in interlayer inclination. The influence of energy evolution is mainly reflected in the decrease in bonding energy conversion ratio and the increase in dissipation energy conversion ratio.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Mechanical
Yingran Fang et al.
Summary: This paper investigates the wear and vibration behaviors that lead to slurry discharge pipelines failure based on a water delivery tunnel in Beijing. The wear morphology of typical pipes is studied, and the time-frequency characteristics of slurry discharge pipe in different strata are analyzed. A multi-parameters early warning method based on vibration characteristics is proposed to detect pipe wear.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Materials Science, Multidisciplinary
Huazhe Jiao et al.
Summary: Water-locking flocs formed by ultrafine tailings particles adversely affect the thickening process during paste preparation. Previous studies have disregarded the relationship between the mesostructure and seepage characteristics of tail mortar during deep dehydration stage. In this study, a shearing seepage test was conducted on unclassified tailing-sedimentation bed using copper tailings, and the morphology and distribution of micropores were analyzed through X-ray computed tomography. The results highlight significant changes in porosity and seepage characteristics after shearing, with the formation of dominant water-seepage flow channels through the connection of isolated pores.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Engineering, Chemical
Jorn Kjolaas et al.
Summary: A series of two- and three-phase experiments were conducted in a 50 m long 4 '' vertical pipe using nitrogen, Exxsol D60 and water at 45 bara pressure. The study found that the liquid content and pressure drop were highly sensitive to the injected water cut, and proposed an explanation for this phenomenon involving the constraint of gas bubble capacity by liquid droplets. The implementation of a simple flow model based on this explanation accurately reproduced the observed three-phase effects.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Chemical
Leiming Wang et al.
Summary: The paper critically discusses the utilization of acidic seawater-based media (ASM) in copper hydrometallurgical industries, highlighting its catalytic effects in chemical/bio leaching processes. It also explores the pivotal ions and compounds present in ASM, their regeneration behavior, and the impact on redox potential, reaction activation energy, and leaching kinetics. Furthermore, the potential of ASM as an alternative to freshwater for accelerating copper sulfide leaching in water-scarce areas is highlighted based on previous studies and reviews.
MINERALS ENGINEERING
(2022)
Article
Construction & Building Technology
Xiaolin Wang et al.
Summary: This study aims to determine the wear law of Q345 steel pipeline under the abrasion-corrosion synergistic effect of CPB at varying mass fractions, flow velocities, and rheological parameters. The results indicate that the CPB mass fraction and the abrasion-corrosion synergistic effect are the dominant factors affecting pipe wear.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Review
Materials Science, Multidisciplinary
Aixiang Wu et al.
Summary: Cemented paste backfill (CPB) is an effective approach for tailings management and underground goaf treatment. Paste rheology, which studies the flow and deformation behaviors of paste during the CPB process, plays a crucial role in solving engineering problems. However, due to the complexity of paste rheology, further research is needed to establish a comprehensive theoretical system.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Metallurgy & Metallurgical Engineering
Wang Xiao-lin et al.
Summary: This study assessed the time-dependent rheological properties of cemented paste backfill (CPB) containing superplasticizer. The results showed that increasing the dosage of superplasticizer significantly reduced the static yield stress, dynamic yield stress, and thixotropy of CPB. Additionally, curing time had a significant effect on these properties. These findings are important for the design of pipe transportation of CPB with superplasticizer.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Geochemistry & Geophysics
Jiandong Wang et al.
Summary: Cemented paste backfill (CPB) blended with coarse aggregates (CA-CPB) is a widely used technology for environmental protection and underground goaf treatment. This study investigates the influences of solid concentration, coarse aggregates dosage, and cement dosage on the rheological properties and compressive strength of CA-CPB through experimental methods. The results show that solid concentration and cement dosage have the most significant effects on the rheological properties and compressive strength, respectively. Multiple response optimization is performed using an overall desirability function approach to obtain the optimal parameters for high fluidity and strength, providing valuable information for the CA-CPB process in the Chifeng Baiyinnuoer Lead and Zinc Mine.
Article
Construction & Building Technology
Gaili Xue et al.
Summary: This research develops an efficient acoustic emission technique to study the strength, acoustic and fractal characteristics of fiber reinforced CTB materials. The study finds that polypropylene provides the best fiber reinforcement influence.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Geochemistry & Geophysics
Leiming Wang et al.
Summary: This study investigates the hydrodynamic hysteresis in agglomerated heaps and its impact on solute transport and leaching reactions. The results show that under acidic leaching conditions, the proportion of mobile liquid increases. The dynamic liquid retention is more influenced by the diameter of packed feeds and superficial flow rate rather than leaching reactions. Solute retention is longer under slower flow rates and smaller packed feed diameters, which improves copper leaching efficiency.
Article
Construction & Building Technology
Jiandong Wang et al.
Summary: This paper investigates the rheology, hydration, and microstructure changes of a novel quick-setting paste under different conditions. The study reveals that hydration, particle settling, and initial static gel strength are important drivers of rheological time-dependence, particularly in early stages.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Zhaolin Yuan et al.
Summary: Cemented paste backfilling is an effective method for processing waste tailings and underground goafs. However, there is a lack of devices or techniques for accurately monitoring the real-time backfilling process in harsh underground environments. This study proposes a 3D visualization and soft-sensing system that estimates the backfilling height in real-time using a laser scanner and simulates the process on web pages. The developed system and technique provide significant guidance for production management in underground backfilling.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2022)
Article
Engineering, Chemical
Jiandong Wang et al.
Summary: This study manufactured two L-shaped pipeline systems with different diameters using electrical resistance tomography (ERT) to observe the flow behavior of paste slurry in vertical pipes. Four typical flow regimes were summarized, and the characteristics of velocity and pressure change with vertical pipe depth were discussed.
Article
Construction & Building Technology
Vighnesh Prasad et al.
Summary: The present study investigates the rheological and pipe flow characteristics of concentrated coal ash slurries. It is found that the slurries exhibit shear thinning flow behavior, and their microstructure changes over time and with applied shear. Experimental viscosity data can be fitted using a specific model, and the yield stress shows an exponential relationship with the solid volume fraction. The head loss during pipeline transportation increases with coal ash concentration and slurry velocity.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
Harendra Nagar et al.
Summary: CFD simulations were conducted to predict the flow characteristics of high solid concentration fly-ash slurries in a pipeline, including pressure drop and concentration profiles. The findings are significant for the design of slurry pipelines.
MATERIALS TODAY-PROCEEDINGS
(2022)
Article
Construction & Building Technology
Shenghua Yin et al.
Summary: The study found that the sulfur content and fiber content have a significant impact on the flow performance and mechanical properties of CSTB, and different improvement measures can be taken to enhance its mechanical performance.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Review
Construction & Building Technology
S. K. Behera et al.
Summary: The article critically reviews the utilization of industrial waste materials (tailings, fly ash, and slag) as paste backfill material for filling underground mine voids. It discusses the factors influencing backfill performance and future research directions in the field.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Review
Green & Sustainable Science & Technology
Leiming Wang et al.
Summary: The study reviews the significance of ore agglomeration for copper metal recovery and the impact of agglomeration behavior on leaching reactions, discussing key factors and parameters, quality evaluation and process control, as well as mass transfer, dual pore structure, and flow behavior.
JOURNAL OF CLEANER PRODUCTION
(2021)
Review
Environmental Sciences
Ke Yang et al.
Summary: Paste backfill technology has become an important part of green safety mine construction and coal green mining technology system in China. By analyzing the statistics and typical cases, the current situation and future development trends of paste backfill technology in coal mines can be understood. The future development direction includes research and development of backfill materials and intelligent paste backfill technology.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Mechanics
Omar R. Piminchumo Marinos et al.
Summary: The study compared two fluid models for predicting liquid-solid flow and found that some model terms neglected in gas-solid flow are important for liquid-solid flow. Through evaluation with intermediate models, the most significant model terms were determined.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2021)
Article
Mechanics
Takshak Shende et al.
Summary: The study highlights that micro-heterogeneity of porous media plays a significant role in influencing non-Newtonian two-phase flow, potentially causing flow instability. Therefore, in designing polymer solution injection, it is crucial to take into account the microscale heterogeneity of the media, in addition to considering capillary number and viscosity ratio.
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
(2021)
Article
Mechanics
Hongjiang Wang et al.
Summary: A new pressure gradient model considering wall slip effect was proposed and validated through experiments, showing better prediction accuracy for UTP flow in pipes compared to the traditional Buckingham equation.
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
(2021)
Article
Engineering, Chemical
Yassine Ait-Khouia et al.
Summary: Management of mine wastes is a growing environmental concern worldwide, prompting the need for efficient and clean techniques to handle wastes containing acid-forming minerals. Physical separation techniques, underutilized in mine waste management but offering potential for valuable mineral enrichment, can achieve similar results as flotation through methods based on mineral properties. These techniques may provide a more cost-effective and environmentally friendly alternative for mine waste management.
MINERALS ENGINEERING
(2021)
Article
Energy & Fuels
Hamed Movahedi et al.
Summary: The study experimentally evaluated the multiphase flow of fine solid particles in an annular space under various flow conditions, and conducted comprehensive numerical analyses. The simulation results were in good agreement with experimental data, and the trends of particle concentration variation along the annular pipe were investigated for different flow velocities and inner pipe rotations.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Mechanical
R. J. Chung et al.
Summary: This study assessed the erosion-corrosion behavior of different steels used in slurry transport, revealing varying performance under different conditions of slurry velocity and dissolved oxygen levels. The results showed that the DP stainless steel exhibited the highest erosion-corrosion resistance at a certain slurry velocity but inferior performance compared to carbon steels at higher velocities. Possible mechanisms responsible for these variations were analyzed and discussed.
Review
Materials Science, Ceramics
R. S. Krishna et al.
Summary: The use of mine tailings as precursors of geopolymers shows promising potential for sustainable utilization and environmental benefits. However, due to the complex composition of mine tailings, further research is needed to better understand the geopolymerization process and the influence of various factors on the properties of mine tailings-based geopolymers.
CERAMICS INTERNATIONAL
(2021)
Review
Engineering, Chemical
Gianandrea Vittorio Messa et al.
Summary: Researchers have been focusing on slurry pipe transport for decades, using Computational Fluid Dynamics (CFD) to simulate flow processes at a local level. The CFD approach shows potential in providing detailed information on slurry pipe flows compared to traditional theoretical models, with a focus on assessing uncertainty and evaluating predictive capacity of existing models.
Article
Water Resources
Vaclav Matousek et al.
Summary: Vertical concentration distributions of solids conveyed in Newtonian fluids can be modeled using RouseSchmidt type distributions. Solids conveyed in turbulent low Reynolds number visco-plastic carriers are more readily suspended than their Newtonian counterparts, producing higher concentrations in the center of the pipe. A Newtonian concentration profile model was adapted to include typical turbulent viscosity distributions within the pipe and particle motion calculated using non-Newtonian sheared settling. Predictions from this and the unmodified model, using the same wall viscosity, are compared with the chord averaged profile extracted from tomographic data obtained using a 50 mm horizontal pipe.
JOURNAL OF HYDROLOGY AND HYDROMECHANICS
(2021)
Article
Construction & Building Technology
Haiyong Cheng et al.
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Green & Sustainable Science & Technology
Leiming Wang et al.
JOURNAL OF CLEANER PRODUCTION
(2020)
Review
Green & Sustainable Science & Technology
Shenghua Yin et al.
JOURNAL OF CLEANER PRODUCTION
(2020)
Article
Engineering, Multidisciplinary
Rugao Gao et al.
ALEXANDRIA ENGINEERING JOURNAL
(2020)
Article
Engineering, Chemical
Haiqiang Jiang et al.
Article
Engineering, Mechanical
Jose Wilmar Calderon-Hernandez et al.
Article
Materials Science, Multidisciplinary
Qian Zhou et al.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2020)
Article
Engineering, Chemical
Jashanpreet Singh et al.
PARTICULATE SCIENCE AND TECHNOLOGY
(2019)
Article
Engineering, Mechanical
Thiana A. Sedrez et al.
Review
Engineering, Chemical
Chongchong Qi et al.
MINERALS ENGINEERING
(2019)
Article
Engineering, Environmental
Sandra Orvalho et al.
CHEMICAL ENGINEERING JOURNAL
(2018)
Article
Construction & Building Technology
L. Liu et al.
CONSTRUCTION AND BUILDING MATERIALS
(2018)
Article
Environmental Sciences
Tekin Yilmaz et al.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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Article
Engineering, Mechanical
E. Howard Coker et al.
Review
Engineering, Mechanical
Vahid Javaheri et al.
Article
Mechanics
Paul Vigneaux et al.
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
(2018)
Article
Engineering, Chemical
Tao Li et al.
MINERALS ENGINEERING
(2018)
Review
Mechanics
Lionel Pullum et al.
ANNUAL REVIEW OF FLUID MECHANICS, VOL 50
(2018)
Review
Engineering, Chemical
Shobha Lata Sinha et al.
PARTICULATE SCIENCE AND TECHNOLOGY
(2017)
Article
Engineering, Chemical
Drissa Ouattara et al.
INTERNATIONAL JOURNAL OF MINERAL PROCESSING
(2017)
Article
Mechanics
Rene Samson et al.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2017)
Article
Geochemistry & Geophysics
Lei Yang et al.
Proceedings Paper
Engineering, Mechanical
Rasel A. Sultan et al.
PROCEEDINGS OF THE 1ST INTERNATIONAL CONFERENCE ON MECHANICAL ENGINEERING AND APPLIED SCIENCE (ICMEAS 2017)
(2017)
Article
Mechanics
J. Singh et al.
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
(2016)
Article
Engineering, Mechanical
Haixiao Liu et al.
Proceedings Paper
Engineering, Multidisciplinary
Yousef Faraj et al.
NEW PARADIGM OF PARTICLE SCIENCE AND TECHNOLOGY, PROCEEDINGS OF THE 7TH WORLD CONGRESS ON PARTICLE TECHNOLOGY
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Engineering, Mechanical
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Article
Engineering, Mechanical
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FLOW MEASUREMENT AND INSTRUMENTATION
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Article
Engineering, Chemical
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MINERALS ENGINEERING
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Article
Computer Science, Interdisciplinary Applications
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COMPUTERS & CHEMICAL ENGINEERING
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Mechanics
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INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
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Article
Engineering, Chemical
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MINERALS ENGINEERING
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Proceedings Paper
Engineering, Chemical
Y. Faraj et al.
Article
Construction & Building Technology
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CEMENT & CONCRETE COMPOSITES
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Article
Engineering, Mechanical
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Article
Engineering, Mechanical
Cunkui Huang et al.
Article
Engineering, Mechanical
Girish R. Desale et al.
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Engineering, Geological
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GEOTECHNICAL AND GEOLOGICAL ENGINEERING
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Article
Environmental Sciences
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WATER RESOURCES RESEARCH
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