Flotation of fine particles in the presence of combined microbubbles and conventional bubbles

Farrokhpay, Saeed; Filippova, I.V.; Filippov, L.O.; Piçarra, Alexandre; Rulyov, N. N.; Fornasiero, Daniel

doi:10.1016/j.mineng.2020.106439

Cited by 58 publications

(30 citation statements)

References 23 publications

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“…The essential outcome was that NB flotation could improve the recovery of ultrafine, and in some cases, coarse particles (Table 1) . [3,6,[9][10][11][12][13][14] It was recently also illustrated that NB generation in the presence of conventional flotation reagents, besides improvement in the flotation recovery, could reduce the overall chemical consumption through the process [15] (Table 1). However, these investigations mostly assessed NB flotation's effect on a narrow size range (ultrafine or coarse range).…”

Section: Introductionmentioning

confidence: 99%

Nanobubble assisted flotation separation of complex Pb–Cu–Zn sulfide ore – Assessment of process readiness

Chipakwe

Sand

Chelgani

2021

Separation Science and Technology

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A considerable difference exists between the flotation separation of artificial minerals and real lowgrade ores processing where selectivity would be the main issue. Nanobubble-assisted (NB) flotation investigations have been mostly examined with pure materials and a narrow particle size range, less on complex sulfide ores. This study considered NB flotation for processing complex Pb-Cu-Zn sulfide ore in two different size ranges and various conditions to assess the process readiness. Metallurgical NB flotation responses (recovery, grade, kinetics, and selectivity index) were determined, compared to conventional tests. Outcomes revealed that an inclusive size fraction (−150 µm) could result in a higher selective process than a fine fraction (-38 µm). In contrast, mass recovery and kinetics were higher for the fine one. In general, adding NBs compared to the conventional (CB) could improve the flotation metallurgical responses; however, the way NBs were generated would be key. NBs generated in the presence of frother (NBF) could produce higher mass and water recoveries while decreasing selectivity. In general, different setups' flotation products showed the following selectivity order of Pb-Cu sulfides: NB>NBF>CB. These results opened a new approach for considering different NB generation conditions when they are going to use in various flotation stages.

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Section: Introductionmentioning

confidence: 99%

Nanobubble assisted flotation separation of complex Pb–Cu–Zn sulfide ore – Assessment of process readiness

Chipakwe

Sand

Chelgani

2021

Separation Science and Technology

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“…Considering that the current consensus among flotation scholars is that, within the typical range used in flotation, the effective bubble size in the process should be as small as possible (Bulatovic, 2007;Wills and Finch, 2015) before reaching a limiting size (ca. < 0.2 mm) where bubbles will not have sufficient buoyancy to float particles efficiently (Farrokhpay et al, 2020). Thus, the results presented in this section can be considered as the first concrete advantage provided by the PS-mixture.…”

Section: Bubble Sizementioning

confidence: 83%

“…The kinetics of the PS-mixtures maintained higher performance levels regardless of the changes in conditions. This observed improvement is likely due to higher froth stability and reduced bubble size provided by the PS-mixture (Farrokhpay et al, 2020), resulting in a lower dependency on the presence of highly hydrophobic minerals (Ahmed and Jameson, 1989;Tan et al, 2010;Wei et al, 2018).…”

Section: Model Oresmentioning

confidence: 99%

Amphiphilic cellulose and surfactant mixtures as green frothers in mineral flotation. 2. Flotation of chalcopyrite and Cu-containing tailings

Nuorivaara

Serna-Guerrero

2020

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…Farrokhpay et al [13] studied how microbubbles interact with fine quartz particles and facilitate the flotation of these particles in a conventional flotation system and as stated by the authors, the higher quartz flotation rate obtained in the presence of microbubbles can be attributed to a higher attachment efficiency of conventional bubbles with particles coated with microbubbles.…”

Section: Equipment Improvements For Ultrafines Flotation-microbubblesmentioning

confidence: 96%

Iron Ore Slimes Flotation Tests Using Column and Amidoamine Collector without Depressant

et al. 2021

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This work describes the concentration of iron ore slimes on a pilot scale by using a 500-mm diameter flotation column and a novel collector, which renders the use of a depressant unnecessary. The pilot column was operated in series with the industrial plant Vargem Grande 2 (Iron Quadrangle, Brazil) receiving, as feed, part of the underflow from the desliming thickener. These pilot tests represented only the rougher stage of a flotation circuit. The novel collector used was an amidoamine (average collector dosage of 160 g/t), and the tests were carried out in the absence of starch, at pH 10.5 and with bubbles/microbubbles generated by cavitation tube. It was possible to achieve a concentrate, by reverse flotation, with an average iron content of 53% and an average metallurgical recovery of 91.5% The recovery of the silica in the froth was 53.1% in average for one stage of flotation. The high variability of the slime characteristics rendered difficult the stabilization of the SiO2 recovery; however, the applicability of the amidoamine collector was proven. In an industrial scale circuit, the use of online analyzers for Fe and SiO2 content and the adoption of control logics based on the adjustment of parameters such as reagents dosage and washing water flow rate adjustment should contribute to the optimization of the results obtained in the pilot scale tests. Further studies adding a cleaner concentration stage should be performed.

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Flotation of fine particles in the presence of combined microbubbles and conventional bubbles

Cited by 58 publications

References 23 publications

Nanobubble assisted flotation separation of complex Pb–Cu–Zn sulfide ore – Assessment of process readiness

Nanobubble assisted flotation separation of complex Pb–Cu–Zn sulfide ore – Assessment of process readiness

Amphiphilic cellulose and surfactant mixtures as green frothers in mineral flotation. 2. Flotation of chalcopyrite and Cu-containing tailings

Iron Ore Slimes Flotation Tests Using Column and Amidoamine Collector without Depressant

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