Effects of magnetite on magnetic coating behavior in pentlandite and serpentine system

Lu, Jiwei; Yuan, Zhulin; Liu, Jiongtian; Li, Lixia; Zhu, Shenghuo

doi:10.1016/j.mineng.2014.12.038

Cited by 41 publications

(4 citation statements)

References 12 publications

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“…where A11, A22, and A33 are the Hamaker constants for the interaction of mineral 1, mineral 2, and water (4.0 × 10 -20 J) (Lu et al, 2015) in vacuum, respectively. The Hamaker constant of kaolinite (A132) in water is 4.6810 −21 J in this study.…”

Section: Resultsmentioning

confidence: 99%

Effect of bulk nanobubbles on flocculation of kaolin in the presence of cationic polyacrylamide

Sha,

Yuan,

Chen

et al. 2024

Physicochem. Probl. Miner. Process.

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The study explores the impact of nanobubble flotation technology on fine mineral processes, focusing on its interaction with cationic polyacrylamide (CPAM) in kaolin flocculation. Nanobubbles influence particle size and promote aggregation. Experimental procedures involve bulk nanobubble preparation, kaolin suspension, and CPAM solutions, with analysis of sedimentation rates, turbidity, and zeta potential. Results show accelerated sedimentation and reduced turbidity with nanobubbles compared to traditional methods. Zeta potential measurements and DLVO theory support nanobubbles' role in reducing electrostatic interaction, facilitating flocculation. This research advances understanding in nanobubble-mediated mineral processing, highlighting eco-friendly flocculants and practical implications for optimization.

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Section: Resultsmentioning

confidence: 99%

Effect of bulk nanobubbles on flocculation of kaolin in the presence of cationic polyacrylamide

Sha,

Yuan,

Chen

et al. 2024

Physicochem. Probl. Miner. Process.

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show abstract

“…where A 11 , A 22 , and A 33 are the Hamaker constants for mineral 1, mineral 2, and water (4.0 × 10 −20 J) [54] in a vacuum, respectively. The Hamaker constant of kaolinite (A 132 ) in water is 4.68 × 10 −21 J.…”

Section: Dlvo Theory Calculation Processmentioning

confidence: 99%

Effect of Bulk Nanobubbles on the Flocculation and Filtration Characteristics of Kaolin Using Cationic Polyacrylamide

Li,

Ma,

Bilal

et al. 2024

Minerals

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This study investigated the influence of bulk nanobubbles (NBs) on the flocculation and filtration behavior of kaolin suspensions treated with cationic polyacrylamide (CPAM). Traditionally, flocculation relies on bridging mechanisms by polymers like CPAM. The present work examines the possibility of combining NBs with CPAM to achieve more efficient kaolin separation. The settling behavior of kaolin suspensions with and without bulk nanobubbles was compared. The results with 2 mL CPAM and 300 s settling time revealed that bulk NBs significantly enhanced flocculation efficiency, with supernatant zone height reductions exceeding 50% compared to CPAM alone, indicating a faster settling rate resulting from bulk NBs. This improvement in the settling rate is attributed to NBs’ ability to reduce inter-particle repulsion (as evidenced by a shift in zeta potential from −20 mV to −10 mV) and bridge kaolin particles, complementing the action of CPAM. Additionally, the study demonstrated that bulk NBs improved dewatering characteristics by lowering the medium resistance and specific cake resistance during filtration. These findings pave the way for the utilization of bulk NBs as a novel and efficient strategy for kaolin separation in mineral processing, potentially leading to reduced processing times and lower operational costs.

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“…Serpentine is a magnesium-rich layered silicate mineral always associated with ascharite, pyrite, and pentlandite [1]. Because of the finely disseminated particle size and frangibility, it was prone to forming slime in grinding, leading to the deterioration of flotation performance [2,3]. Based on previous research, hydrophilic serpentine exhibited poor floatability, leading to a low flotation recovery [4,5].…”

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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Effects of magnetite on magnetic coating behavior in pentlandite and serpentine system

Cited by 41 publications

References 12 publications

Effect of bulk nanobubbles on flocculation of kaolin in the presence of cationic polyacrylamide

Effect of bulk nanobubbles on flocculation of kaolin in the presence of cationic polyacrylamide

Effect of Bulk Nanobubbles on the Flocculation and Filtration Characteristics of Kaolin Using Cationic Polyacrylamide

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

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