Improving separation efficiency of galena flotation using the Aerated Jet Flotation Cell

Li, Si; Wang, Yuhua; Lu, Dongfang; Zheng, Xiayu; Li, Xudong

doi:10.37190/ppmp/120108

Cited by 10 publications

(4 citation statements)

References 34 publications

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“…In order to construct a flat coal molecular layer surface to simulate the spreading of nonpolar oil drops, the graphite compression method was used for simulation. There has been a large body of literature that has investigated the wettability of coal surfaces using the graphite compression method [27, 42], illustrating the applicability of this method. The specific simulation process is shown in Figure 2.…”

Section: Molecular Dynamics Simulationsmentioning

confidence: 99%

Study on the microscopic mechanism of adsorption and diffusion of hydrocarbon oil drops on coal surface using molecular dynamics simulations

Zhao,

Liu

2023

Int J of Quantum Chemistry

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Flotation of fine coal particles usually uses oil collectors, but the micromechanisms need to be more refined due to the complex structure and abundant functional groups on the surface of coal bodies. The adsorption spreading behavior and interfacial properties of nonpolar oil drops on flat low‐order coal (LOC) and high‐order coal (HOC) surfaces were investigated in depth using molecular dynamics (MD) simulations, while the effects of different functional groups on LOC surfaces were also considered. The results showed that the contact angle, contact area and interaction energy of oil drops adsorbed on the LOC and HOC surfaces at simulated equilibrium in aqueous environment were 77.68°, 621.49 Å2, −140.94 kcal/mol; 53.98°, 962.14 Å2, and −195.13 kcal/mol, respectively. The smaller the equilibrium contact angle between the oil drops and the surface, the larger the contact area and the larger the absolute value of the interaction energy, the better the spreading effect of the oil drops and the easier the surface is to flotation. Compared with the HOC surface, the oil drops could not displace the water molecules on the LOC surface better and spread poorly on its surface, and the migration rate was higher. This was caused by the abundant functional groups on the surface of LOC. The type of functional group significantly affects the interaction of nonpolar oil drops with hydrophilic surfaces, with the order of adsorption strength being CH3 > COCH3 > OH > COOH. The formation of a dense hydrated film of oil drops on the COOH surface was an important reason for the difficulty of flotation on the LOC surface. MD elucidated the mechanism of action of nonpolar oil collectors on LOC and HOC surfaces, which is a guide for efficient flotation on LOC surfaces.

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Section: Molecular Dynamics Simulationsmentioning

confidence: 99%

Study on the microscopic mechanism of adsorption and diffusion of hydrocarbon oil drops on coal surface using molecular dynamics simulations

Zhao,

Liu

2023

Int J of Quantum Chemistry

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“…Also, compared to conventional systems, the oxygen exchange mechanism using a sputtering jet of water is a better way to add oxygen to a pool of water . Additional uses include cell bioreactor, oxygenation, and mineral-processing flotation cells. − In another industrial process that involves casting polymers and glass, enhancing the interaction between gas and liquid aeration is crucial for the effective creation of goods . Based on how much electricity is used, an aeration system’s efficiency is measured by how well it can move oxygen into liquid water.…”

Section: Introductionmentioning

confidence: 99%

Analytical Investigation of the Impact of Jet Geometry on Aeration Effectiveness Using Soft Computing Techniques

Puri,

Kumar,

Sihag

et al. 2023

ACS Omega

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Jet aeration is a commonly used technique for introducing air into water during wastewater treatment. In this investigation, the efficacy of different soft computing models, namely, Random Forest, Reduced Error Pruning Tree, Artificial Neural Network (ANN), Gaussian Process, and Support Vector Machine, was examined in predicting the aeration efficiency (E 20 ) of circular and square jet configurations in an open channel flow. A total of 126 experimental data points were utilized to develop and validate these models. To assess the models' performance, three goodness-of-fit parameters were employed: correlation coefficient (CC), root-mean-square error (RMSE), and mean absolute error (MAE). The analysis revealed that all of the developed models exhibited predictive capabilities, with CC values surpassing 0.8. Nonetheless, when it comes to predicting E 20 , the ANN model outperformed other soft computing models, achieving a CC of 0.9748, MAE of 0.0164, and RMSE of 0.0211. A sensitivity analysis emphasized that the angle of inclination exerted the most significant influence on the aeration in an open channel. Furthermore, the results demonstrated that square jets delivered superior aeration compared to that of circular jets under identical operating conditions.

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“…In recent years, AFM has been widely applied to study surface properties in many fields and could directly characterize and measure the nanoscale forces between particles [31,32]. For example, The attractive force between serpentine and ascharite could turn repulsive by adsorption of Ca 2+ , Mg 2+, or Cu 2+ on particles' surfaces, resulting in well dispersive flotation environment [33]. Cations could also change the repulsive force between kaolinite/montmorillonite and fine coal to be attractive [34].…”

Section: Introductionmentioning

confidence: 99%

Dissolution Property of Serpentine Surface and the Effect on Particle–Particle Interaction Behavior in Solution

Cheng

et al. 2023

Minerals

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The dissolution property of serpentine and its effect on the interaction between particles are reported here. Dissolution experiments showed that magnesium ions and hydroxyl were removed from the surface after mechanically stirring in solution, leading to the incongruent dissolution of ions. SEM, XPS, and Zeta potential analysis uncovered a significant change in serpentine surface potential and elements distribution after dissolution. Meanwhile, dramatic morphology changes on the surface were observed. A settlement test was carried out to explore the effect of dissolution on particle interaction. The results indicated that the settlement rate rises with increasing pH, but the fine particles had a lower settlement rate, showing the close connection between dissolution and particle interaction. AFM analysis revealed that the interparticle force could be changed because of surface properties at different pH values, leading to different interaction behaviors in the solution. In general, the adhesion force gradually increased and even changed from repulsive to attractive as pH ranged from 4 to 11, reflecting the adhesion behavior among particles in water. Moreover, compared to −45 + 38 μm samples, −38 μm particles are more likely to be kept repulsive in acid solution.

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Improving separation efficiency of galena flotation using the Aerated Jet Flotation Cell

Cited by 10 publications

References 34 publications

Study on the microscopic mechanism of adsorption and diffusion of hydrocarbon oil drops on coal surface using molecular dynamics simulations

Study on the microscopic mechanism of adsorption and diffusion of hydrocarbon oil drops on coal surface using molecular dynamics simulations

Analytical Investigation of the Impact of Jet Geometry on Aeration Effectiveness Using Soft Computing Techniques

Dissolution Property of Serpentine Surface and the Effect on Particle–Particle Interaction Behavior in Solution

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