Atomic insights into flotation separation of KCl and NaCl from a new viewpoint of hydration layer: A molecular dynamic study

Ai, Zhong; Li, Shoujiang; Zhao, Yunliang; Yi, Hao; Chen, Licai; Chen, Peng; Nie, Guihua; Song, Shaoxian

doi:10.1016/j.colsurfa.2020.125071

Cited by 6 publications

(3 citation statements)

References 32 publications

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“…Ai et al used MD simulations to compare the flotation separation of KCl and NaCl in the presence of a hydration layer using the octadecylamine (ODA) collector. The ODA collector is able to cross the hydration layer to adsorb on the KCl surface.…”

Section: Applications Of Molecular Modeling To Froth Flotationmentioning

confidence: 99%

“…373 The multilayer hydration of the hydrophobic galena and hydrophilic pyrite surfaces via DFT calculations captured different dominant interaction mechanisms for each surface; while water-surface interactions in hydrophobic surfaces mainly occur through hydrogen bonds, covalent bonding between surface-exposed metal atoms and oxygens of water molecules dominantly occurs for hydrophilic surfaces. 372 Ai et al 234 used MD simulations to compare the flotation separation of KCl and NaCl in the presence of a hydration layer using the octadecylamine (ODA) collector. The ODA collector is able to cross the hydration layer to adsorb on the KCl surface.…”

Section: Minerals/water/gas Interfaces In Flotationmentioning

confidence: 99%

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Emerging Trends of Computational Chemistry and Molecular Modeling in Froth Flotation: A Review

et al. 2023

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Froth flotation is the most versatile process in mineral beneficiation, extensively used to concentrate a wide range of minerals. This process comprises mixtures of more or less liberated minerals, water, air, and various chemical reagents, involving a series of intermingled multiphase physical and chemical phenomena in the aqueous environment. Today’s main challenge facing the froth flotation process is to gain atomic-level insights into the properties of its inherent phenomena governing the process performance. While it is often challenging to determine these phenomena via trial-and-error experimentations, molecular modeling approaches not only elicit a deeper understanding of froth flotation but can also assist experimental studies in saving time and budget. Thanks to the rapid development of computer science and advances in high-performance computing (HPC) infrastructures, theoretical/computational chemistry has now matured enough to successfully and gainfully apply to tackle the challenges of complex systems. In mineral processing, however, advanced applications of computational chemistry are increasingly gaining ground and demonstrating merit in addressing these challenges. Accordingly, this contribution aims to encourage mineral scientists, especially those interested in rational reagent design, to become familiarized with the necessary concepts of molecular modeling and to apply similar strategies when studying and tailoring properties at the molecular level. This review also strives to deliver the state-of-the-art integration and application of molecular modeling in froth flotation studies to assist either active researchers in this field to disclose new directions for future research or newcomers to the field to initiate innovative works.

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Section: Applications Of Molecular Modeling To Froth Flotationmentioning

confidence: 99%

Section: Minerals/water/gas Interfaces In Flotationmentioning

confidence: 99%

Emerging Trends of Computational Chemistry and Molecular Modeling in Froth Flotation: A Review

et al. 2023

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“…Dubiel and Ratajczak reported a maximum KCl recovery of 83.0%, 23 while Huang et al's study showed a KCl flotation recovery of 80.5% when conventional reagents were used. 24 To increase KCl recovery, many scholars 25,26 have focused on developing the collector, instead of the potential effect of the frother on improvements in KCl flotation efficiency, despite the frother showing a very important potential role in the optimization of flotation performance. To date, limited research on the development and characterization of frothers is available.…”

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confidence: 99%

Froth stability and entrainment evaluation of a novel frother for KCl/NaCl flotation

Wang

Song

2023

AIChE Journal

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The rate of KCl recovery by froth flotation using low-grade carnallite is 70%-85%.Herein, a novel frother, dipropylene glycol butyl ether (DPNB), was prepared to increase the flotation efficiency of KCl recovery systems. DPNB could be applied at only half the dosage of the conventional frother methyl isobutyl carbinol (MIBC) and achieve a KCl recovery rate of 94.8%-98.6% with a high KCl grade (63.2%-66.5%).To date, these results are the best reported for pneumatic flotation. DPNB had a 10% higher maximum dynamic stability factor compared with MIBC; moreover, the apparent entrainment velocity of DPNB was half that of MIBC. The molecular structure of DPNB had hydroxyl and ether groups, which promoted interactions with water, thereby contributing to its excellent froth stability. DPNB is environment friendly owing to its low volatility and, thus, a promising frother for the green and highly efficient flotation of KCl/NaCl.

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Intensification of potash ore flotation by the introduction of industrial oils

Osipova

Shevchuk

Stromski³

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND:The paper comprises the study of the enrichment process of potash ore with the addition of industrial oils I-8A, I-12A, I-30A to the base complex collector as an additional hydrophobizator.RESULTS: Comparative studies of flotation using liquid paraffins and industrial oils have shown the effectiveness of the latter. Physical research methods showed the effect of hydrophobizing additives on the adsorption of amine on potassium chloride crystals.CONCLUSION: The research found that introducing industrial oils into the flotation system ensures potassium chloride extraction at the same level 93.25-94.86% as when using a collective mixture with liquid paraffins. It was 10.2-11.5% higher than when using a collective mixture without apolar reagents. Thus, the best flotation performance using industrial oils was possible due to increased apolar reagent consumption. The optimal consumption of industrial oil under laboratory conditions was 20-25 g t -1 ore.

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Atomic insights into flotation separation of KCl and NaCl from a new viewpoint of hydration layer: A molecular dynamic study

Cited by 6 publications

References 32 publications

Emerging Trends of Computational Chemistry and Molecular Modeling in Froth Flotation: A Review

Emerging Trends of Computational Chemistry and Molecular Modeling in Froth Flotation: A Review

Froth stability and entrainment evaluation of a novel frother for KCl/NaCl flotation

Intensification of potash ore flotation by the introduction of industrial oils

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