Conventional and recent advances in gravity separation technologies for coal cleaning: A systematic and critical review

Phengsaart, Theerayut; Srichonphaisan, Palot; Kertbundit, Chinawich; Soonthornwiphat, Natatsawas; Sinthugoot, Somthida; Phumkokrux, Nutthakarn; Juntarasakul, Onchanok; Maneeintr, Kreangkrai; Numprasanthai, Apisit; Tabelin, Carlito Baltazar; Tabelin, Carlito Baltazar; Hiroyoshi, Naoki; Park, Ilhwan

doi:10.1016/j.heliyon.2023.e13083

Cited by 32 publications

(13 citation statements)

References 280 publications

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“…Source control for Hg is only accomplished through coal washing, where the Hg removal efficiencies for traditional and modern coal washing are about 38.8% and 65–90%, respectively [ 36 ]. Traditional coal washing is based on density separation and hence its low Hg removal efficiency [ 116 ]. Modern coal washing applies chemical binders such as polymers, surfactants, and sorbents, and froth floating hence its high removal efficiencies [ 117 ].…”

Section: Strategies For Mercury Control and Environmental Remediationmentioning

confidence: 99%

Mercury abatement in the environment: Insights from industrial emissions and fates in the environment

Kung,

Wu,

Huang

et al. 2024

Heliyon

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Section: Strategies For Mercury Control and Environmental Remediationmentioning

confidence: 99%

Mercury abatement in the environment: Insights from industrial emissions and fates in the environment

Kung,

Wu,

Huang

et al. 2024

Heliyon

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“…The belt should lie on the basin bottom, moving along the perpendicular direction to the plane, as in Figure 1. In some conventional gravity separation processes such as sedimentation, jigging, shaking tables, and hydrocyclones [31,32], particles are transported by liquid. The separation result depends not only on particle density, but also on particle size.…”

Section: Principle Of the Innovative Mdsmentioning

confidence: 99%

An Innovative Magnetic Density Separation Process for Sorting Granular Solid Wastes

Wang,

Rem,

Di Maio

et al. 2024

Recycling

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Solid waste sorting is an important pre-treatment in recycling to improve the efficiency of material recovery and reduce costs. Motivated by the PEACOC project on metal recovery from solid wastes, an innovative magnetic density separation (MDS) process has been developed for solid waste sorting. It has intrinsic advantages over conventional gravity separation technologies and the previously industrialized MDS process. The new MDS process applies an inclined planar magnet and a horizontal basin containing a static magnetic fluid as the separation medium. A particle sliding phenomenon is identified as a feature that could help the separation. Experiments have been carried out to demonstrate the role of the MDS in concentrating valuable metals in shredded PCBAs and reducing metallic contaminants in plastic fractions of shredded wires. A pilot scale facility is introduced to show the design to achieve continuous production and to reduce the consumption of ferrofluid.

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“…The practice of utilizing spirals for treating coal fines is not new in the mineral-processing industry [21,22]. The developments in spiral designs have been primarily aimed at improving the cleaning of coal fines, as economic feasibility for fine coal recovery has been a challenge in the past [21].…”

Section: Introductionmentioning

confidence: 99%

Fluid Flow Modeling and Analysis of Low‐ and High‐Gravity Spiral Concentrators: Experimental and Analytical Approaches

Ankireddy,

Purushotham,

Narasimha

2023

Chem Eng & Technol

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An experimental evaluation of the flow field on two high‐gravity spiral concentrators is presented along with the analytical solutions. A digital depth gauge was used to measure the liquid level on the spiral troughs. The tracer particle trajectories and the free surface velocity of a spiral were determined with a high‐speed camera. An increase in the flow rate leads to an increase in the liquid depth and free surface velocity along the trough surface. Three full turns of the high gravity spiral concentrator are sufficient for achieving a stabilized flow. High‐gravity spirals show lower flow depths and free surface velocities but steeper depths on the outer trough zone than low‐gravity spirals. Higher flow depths contribute to larger circulation zones, which eventually help in greater separation of heavier minerals from gangue particles.

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Conventional and recent advances in gravity separation technologies for coal cleaning: A systematic and critical review

Cited by 32 publications

References 280 publications

Mercury abatement in the environment: Insights from industrial emissions and fates in the environment

Mercury abatement in the environment: Insights from industrial emissions and fates in the environment

An Innovative Magnetic Density Separation Process for Sorting Granular Solid Wastes

Fluid Flow Modeling and Analysis of Low‐ and High‐Gravity Spiral Concentrators: Experimental and Analytical Approaches

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