The efficiency of thermal electro-osmosis method in dewatering of alumina tailings

Hamidi, Amir; Pashang, Bahram; Asadollahfardi, Gholamreza; Sheikhy, Farzad

doi:10.1007/s12517-023-11285-5

Cited by 4 publications

(2 citation statements)

References 35 publications

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“…The combination of electric voltage and temperature-induced heating was investigated for the dewatering of wastewater sludge, sewage biosolids, and mine tailings through the electroosmosis process. A study on the electroosmosis process for dewatering alumina mine tailings showed that increasing voltage doubled electric current at low temperatures and quadrupled it at higher temperatures, leading to greater water collection [188]. However, higher temperature and voltage increased electroosmotic permeability, with the most efficient dewatering observed at 45 • C and 21 V. The effect of TAMD on a variety of materials and processing conditions, including temperature (21-90 • C) and pressure (300-3000 kPa), showed 70%-95% removal of the inherent water content found in talc, cellulose, and bentonite [187].…”

Section: Thermal-mechanical Dewatering and Thermal Electroosmosis Dew...mentioning

confidence: 99%

Towards a Circular Economy in the Mining Industry: Possible Solutions for Water Recovery through Advanced Mineral Tailings Dewatering

Hamraoui,

Bergani,

Ettoumi

et al. 2024

Minerals

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The mining industry is confronted with substantial challenges in achieving environmental sustainability, particularly regarding water usage, waste management, and dam safety. The increasing global demand for minerals has led to increased mining activities, resulting in significant environmental consequences. By 2025, an estimated 19 billion tons of solid tailings are projected to accumulate worldwide, exacerbating concerns over their management. Tailings storage facilities represent the largest water sinks within mining operations. The mismanagement of water content in tailings can compromise their stability, leading to potential dam failures and environmental catastrophes. In response to these pressing challenges, the mining industry is increasingly turning to innovative solutions such as tailings dewatering and water reuse/recycling strategies to promote sustainable development. This review paper aims to (I) redefine the role of mine tailings and explore their physical, chemical, and mineralogical characteristics; (II) discuss environmental concerns associated with conventional disposal methods; (III) explore recent advancements in dewatering techniques, assessing their potential for water recovery, technical and economic constraints, and sustainability considerations; (IV) and present challenges encountered in water treatment and recycling within the mining industry, highlighting areas for future research and potential obstacles in maximizing the value of mine tailings while minimizing their environmental impact.

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Section: Thermal-mechanical Dewatering and Thermal Electroosmosis Dew...mentioning

confidence: 99%

Towards a Circular Economy in the Mining Industry: Possible Solutions for Water Recovery through Advanced Mineral Tailings Dewatering

Hamraoui,

Bergani,

Ettoumi

et al. 2024

Minerals

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show abstract

“…Therefore, the use of ground improvement techniques for accelerating settlements or dewatering tailings compatible with project conditions is essential. For instance, the surcharge loading method for the control of settlements for lowly consolidated areas with soft uranium tailings [36], electro-osmosis method for dewatering mineral tailings (e.g., leach residue and gypsum [38]; copper sulfide tailings [39]; iron ore tailings [40]; alumina tailings [41]), and vacuum consolidation in order to manage settlements (e.g., soda ash tailings [42]; oil sands tailings [43]; fine copper tailings [44]).…”

Section: Introductionmentioning

confidence: 99%

A comprehensive study on the effects of initial water content, suction magnitude, and drainage zone size on self-weight consolidation and vacuum preloading of soft soils and slurried mine tailings

Ahmadi,

Bazaz

2024

Preprint

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The self-weight consolidation of deposits consisting of fine-grained materials takes a long time. Using a suitable improvement method such as vacuum preloading can accelerate the consolidation. The first innovation is to experimentally assess the vacuum preloading effectiveness for expediting the settlement process of slurry tailings from the Sungun copper mine located in Iran. A new laboratory set-up is configured for radial and vertical consolidations of slurry samples. Effects of initial water content, suction level, and drainage zone size (i.e., sample relative size and vertical drain dimensions) on the tailings consolidation are evaluated through 272 tests. Previous studies indicate that analytical and numerical approaches are limited to particular assumptions and yield correct predictions only if various parameters during consolidation can be accurately determined. Therefore, as the second novelty, new empirical correlations are derived based on a modified multiple linear regression to simply predict vertical strain versus time curves under self-weight and vacuum consolidations with high accuracy. The data required for the statistical analysis are collected from the experimental results of Sungun tailings and a set of previous studies with a wide range of input values. The formulas proposed in this research are verified through several past in-situ and experimental studies with errors of less than 9%.

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Performance Evaluation of Clayey Soil Considering Impact of Lime During Electrokinetic Consolidation

2023

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The efficiency of thermal electro-osmosis method in dewatering of alumina tailings

Cited by 4 publications

References 35 publications

Towards a Circular Economy in the Mining Industry: Possible Solutions for Water Recovery through Advanced Mineral Tailings Dewatering

Towards a Circular Economy in the Mining Industry: Possible Solutions for Water Recovery through Advanced Mineral Tailings Dewatering

A comprehensive study on the effects of initial water content, suction magnitude, and drainage zone size on self-weight consolidation and vacuum preloading of soft soils and slurried mine tailings

Performance Evaluation of Clayey Soil Considering Impact of Lime During Electrokinetic Consolidation

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