Evaluation of an Attachment–Detachment Kinetic Model for Flotation

Safari, Mehdi; Deglon, D.A.

doi:10.3390/min10110978

Cited by 21 publications

(4 citation statements)

References 21 publications

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“…Physical froth flow modifiers can change the rate of drainage (bubble lamellae drainage and plateau border drainage) and the rate of bubble coalescence and therefore they can influence the local detachment and attachment processes [4,33,[38][39][40][41][42]. Thus, physical froth flow modifiers can therefore influence the quantity, type, and composition of particles that finally report to the concentrate.…”

Section: Brief Overview Of Froth Phase Sub-processesmentioning

confidence: 99%

A Review of Flotation Physical Froth Flow Modifiers

Jera

Bhondayi

2021

Minerals

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Over the past few decades, the need to process more minerals while lowering capital costs has led to an increase in the size of flotation cells, e.g., 0.03 m3 to 1000 m3. However, this increase has created new challenges in the operation and design of industrial flotation cells, particularly in terms of froth removal, because the distance the froth must travel increases with an increase in the flotation cell diameter. This has a negative impact on recovery. Physical froth flow modifiers can be used to improve froth removal. Their major functions are to modify and optimise the flow of the froth, improve froth drainage, reduce dead zones, and improve froth flow and removal dynamics. Therefore, physical froth flow modifiers are discussed, evaluated, and compared in this paper. The literature indicates that physical froth flow modifiers such as crowders and launders are used extensively as industrial solutions to enhance froth transport and recovery in large flotation cells. Other modifiers (including froth baffles and froth scrapers) have been found to have a profound effect on local froth phase sub-processes, including drainage and bubble coalescence. However, industrial uptake is either dwindling or limited to small-volume rectangular/U-shaped cells in the case of scrapers, or, there is no uptake at all in the case of froth baffles. Further research on how some of the physical modifiers (e.g., baffles and launders) impact the selectivity of particles is required.

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Section: Brief Overview Of Froth Phase Sub-processesmentioning

confidence: 99%

A Review of Flotation Physical Froth Flow Modifiers

Jera

Bhondayi

2021

Minerals

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“…In order for hydrophobic particles to be successfully captured by bubbles, particles and bubbles must first be close enough, that is, particles and bubbles must collide effectively, which is usually determined by the hydrodynamics of the flow field where particles and bubbles are located [21]. Secondly, the hydration film between the hydrophobic particles and the bubbles becomes thin and breaks, and a three-phase contact periphery begins to form and reaches a stable state, that is, the particles adhere to the surface of the bubbles and form particle-bubble aggregates [22]. Finally, when the external force exerted on the particles is greater than the force between the particles and the bubbles, the particles will break away from the surfaces of the bubbles.…”

Section: Introductionmentioning

confidence: 99%

A Review of Ultrasonic Treatment in Mineral Flotation: Mechanism and Recent Development

Zhang,

Du,

et al. 2024

Molecules

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Ultrasonic treatment has been widely used in the mineral flotation process due to its advantages in terms of operational simplicity, no secondary pollutant formation, and safety. Currently, many studies have reported the effect of ultrasonic treatment on mineral flotation and shown excellent flotation performance. In this review, the ultrasonic mechanisms are classified into three types: the transient cavitation effect, stable cavitation effect, and acoustic radiation force effect. The effect of the main ultrasonic parameters, including ultrasonic power and ultrasonic frequency, on mineral flotation are discussed. This review highlights the uses of the application of ultrasonic treatment in minerals (such as the cleaning effect, ultrasonic corrosion, and desulfuration), flotation agents (such as dispersion and emulsification and change in properties and microstructure of pharmaceutical solution), and slurry (such formation of microbubbles and coalescence). Additionally, this review discusses the challenges and prospects of using ultrasonic approaches for mineral flotation. The findings demonstrate that the application of the ultrasonic effect yields diverse impacts on flotation, thereby enabling the regulation of flotation behavior through various treatment methods to enhance flotation indices and achieve the desired objectives.

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“…The decline in the recovery of coarse particles (>100 µm) is attributed to many reasons, including poor liberation [12][13][14], the low carrying capacity of bubbles [15,16], and the detachment of bubble-particle aggregates due to high turbulence [17][18][19][20]. The poor recovery of fines (<10 µm) is attributed to low collision efficiencies with relatively large bubbles [21,22].…”

Section: Introductionmentioning

confidence: 99%

Investigating the Amenability of a PGM-Bearing Ore to Coarse Particle Flotation

et al. 2023

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Coarse particle flotation (CPF) is one of the strategies employed to reduce energy consumption in mineral-processing circuits. HydrofloatTM (HF) technology has been successfully applied in the coarse flotation of industrial minerals and sulphide middlings. However, this technology has not yet been applied in platinum group minerals (PGMs)’ flotation. In this paper, the amenability of platinum group minerals to CPF was investigated. Extensive flotation testwork was conducted to optimise the hydrodynamic parameters, i.e., bed level, air and water flow rates, in the flotation of coarse PGM feed using Hydrofloat. Mineralogical analysis of the feed and selected flotation products was conducted to understand the reasons for the recovery and loss of the valuable minerals. The results showed that the HF separator could upgrade the PGM ore with particles as coarse as +106 − 300 µm. For the optimised test, a reasonable Pt, Pd and Au recovery of 84% was achieved at a grade of 10 g/t and 16.5% mass pull, despite the platinum group minerals being poorly liberated (4.5 vol% fully liberated). The results demonstrated that HF achieved high recovery efficiencies across the 150–300 microns size fraction. The HF was therefore able to substantially increase the upper particle size that can be successfully treated by flotation in PGM operations. It was found that an increase in bed height, water rate and air flow rate resulted in an increase in recovery to a maximum. A further increase in the hydrodynamic parameters resulted in a decline in recovery. Hydrofloat outperformed the conventional Denver flotation machine across the following size fractions: +106 − 150 µm, +150 − 212 µm, +212 − 250 µm and +250 − 300 µm. The practical implications of the findings on the modification of existing circuits and the design of novel flowsheets for the processing of PGM ores with less water and energy consumption are discussed.

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Evaluation of an Attachment–Detachment Kinetic Model for Flotation

Cited by 21 publications

References 21 publications

A Review of Flotation Physical Froth Flow Modifiers

A Review of Flotation Physical Froth Flow Modifiers

A Review of Ultrasonic Treatment in Mineral Flotation: Mechanism and Recent Development

Investigating the Amenability of a PGM-Bearing Ore to Coarse Particle Flotation

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