Cyclonic state micro-bubble flotation column in oil-in-water emulsion separation

Li, Xiaobing; Xu, Hongxiang; Liu, Jiongtian; Zhang, Jian; Li, Jing; Gui, Zhaolong

doi:10.1016/j.seppur.2016.01.021

Cited by 97 publications

(43 citation statements)

References 22 publications

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“…These findings were attributed to the increase in relative velocity between the mineralized bubble (aggregate of valuable materials and bubbles) and gangue particles under a centrifugal force field [22]. This increase in centrifugal force also increases the collision probability between fine particles and bubbles [24]. This phenomenon is in good agreement with observations for ASH [11,12,14].…”

Section: Rougher Flotationsupporting

confidence: 88%

“…In other words, cyclonic microbubble flotation column can extend the lower particle size limits for effective flotation due to the combination of nanobubbles and centrifugal force separation [11,19]. In a rougher flotation process, this flotation column usually presents better separation efficiency in the beneficiation of coal fines [20,21], siliceous phosphate ores [22], magnetite ores [23], and oil-in-water emulsions [24] compared to mechanical flotation cells or dissolved air flotation column. Note: C-I and C-II represent the mechanical flotation cell and flotation column, respectively; FC ad (%) = % fixed carbon in the concentrate (air-dried basis).…”

Section: Introductionmentioning

confidence: 99%

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Multi-Stage Flotation for the Removal of Ash from Fine Graphite Using Mechanical and Centrifugal Forces

Zhang

Peng

et al. 2018

Minerals

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Graphite ore collected from Hunan province, south China was characterized by chemical analysis, X-ray diffraction, and optical microscopy. Rougher and multi-stage flotation tests using a mechanical flotation cell and a flotation column containing an additional centrifugal force field were carried out to promote its grade and economic value. In rougher flotation, both the mechanical flotation cell and flotation column reduced the ash content of the graphite ore from 15.43% to 10.8%, while the yield of the flotation column (91.41%) was much higher than that of the mechanical flotation cell (50%). In the presence of hydrophobic graphite, the seriously entrained gangue restricted further improvement in the quality and economic value of the graphite ore. Therefore, multi-stage flotation circuits were employed to diminish this entrainment. Multi-stage flotation circuits using the two flotation devices further decreased the ash content of the graphite ore to~8%, while the yield when using the flotation column was much higher than that obtained from the mechanical flotation cell employed. On the other hand, the ash removal efficiency of the flotation column was 3.82-fold higher than that observed for the mechanical flotation cell. The Cleaner 3 flotation circuit using the flotation column decreased the ash content in graphite from 15.43% to 7.97% with a yield of 77.53%.

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Section: Rougher Flotationsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Multi-Stage Flotation for the Removal of Ash from Fine Graphite Using Mechanical and Centrifugal Forces

Zhang

Peng

et al. 2018

Minerals

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“…Plug flow, cyclonic flow, pipe flow, and jet flow were effectively combined in the column. Now, it has been applied in many fields such as mineral separation, oil-water separation, and decarbonization Ran et al, 2013;Li et al, 2016) due to its excellent performance in fine minerals separation.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on the classification of a cyclonic field in a flotation column

Li¹,

Xiao²,

Yan³

et al. 2020

Physicochem. Probl. Miner. Process.

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The cyclonic-static micro-bubble flotation column (FCSMC) performs well in fine mineral flotation. Compared to traditional flotation columns, its design innovatively introduces a cyclonic structure. The separation of middling and tailing occurs in the cyclonic flow field induced by a cyclonic reversal cone. In this study, the particle size distribution analysis and computational fluid dynamics (CFD) simulations were conducted to reveal the particle distribution law and the classification mechanism in cyclonic flow fields under different circulation pressures. The results showed that particle size showed the same distribution tendency as tangential velocity in the radial direction: both increase from the center and decrease around the wall. As circulation flux increased, the tangential velocity increased, and the particle size differences in the radial direction also increased. The position of the largest particles will move to outside as the largest value of tangential velocity migrates the outward in the radial direction. According to the particle size distribution of the feed, it can be adjusted to the flow field to change the particle distribution, thereby improving the efficiency of separation. This study has an important guiding significance for column design and adjustment of the operating parameters of the flotation process.

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“…Microbubble technologies have been the subject of intensive research over the past decade, due to their wide applications in various industries and processes, such as: flotation and separation in mineral processing industry [1], polishing slurry used in precise mechanical polishing [2], processing of leaching water [3], and wastewater treatment [4], [5]. Microbubbles (MBs) are tiny bubbles with a respective diameter of 10-50 µm [5].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of Shaft System of Micro Bubble Generating Pump

Bahrudin¹,

Sugiarto²

2017

IJMMM

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Abstract-Gas-liquid mixing pump is one type of microbubble generator which is very efficient for mixing gas and liquid directly and dissolve them. However, one of the problems in designing the rotating machinery is the vibration, because the vibration is usually a direct cause of the component damage. In this paper, the dynamic characteristic of shaft system on a micro bubble generating pump was evaluated based on finite element analysis using ANSYS to investigate the stability and the critical speed of the system. Based on the results of evaluation, finite element analysis can predict the vibration modes on the entire segment of the shaft system in accordance with the natural frequencies of the respective modes. However, it did not find any critical speeds below the design rotational velocity of the shaft system. It can be concluded that the shaft system of the gas-liquid mixing pump was still outside the resonance region and the structural design of the shaft system could be operated safely.. Index Terms-Finite element, Campbell diagram, natural frequency, micro bubble, gas-liquid mixing pump.

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Cyclonic state micro-bubble flotation column in oil-in-water emulsion separation

Cited by 97 publications

References 22 publications

Multi-Stage Flotation for the Removal of Ash from Fine Graphite Using Mechanical and Centrifugal Forces

Multi-Stage Flotation for the Removal of Ash from Fine Graphite Using Mechanical and Centrifugal Forces

Experimental and numerical study on the classification of a cyclonic field in a flotation column

Dynamic Analysis of Shaft System of Micro Bubble Generating Pump

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