Particle motion analysis of a new three-phase fluidized bed flotation column with glass sphere particles

Han, Jikang; Fang, Jiahao; Yang, Ting; Chen, Peng; Liu, Taishan; Li, Yanfeng

doi:10.1016/j.apt.2023.104265

Cited by 4 publications

(1 citation statement)

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“…Since the invention of the flotation column, it has made great progress because of its wide adaptability in handling fine-grained materials and other scientific fields [4][5][6][7][8]. The gas parameters, such as gas retention rate, bubble diameter, and bubble surface area flux, are the most critical indexes to evaluate flotation, which directly affect the effectiveness of flotation columns [9][10][11]. Therefore, when controlling and diagnosing the operation of flotation columns, it is important to know the gas parameters.…”

Section: Introductionmentioning

confidence: 99%

Study of a Novel Fluidized Bed Flotation Column with Enhanced Bubble Dispersion

Yin,

Han,

Yang

et al. 2024

Minerals

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Flotation machines and flotation columns are widely used as separation equipment for coal sludge. In order to obtain better flotation results for different particle sizes, the bubble distribution and size in the flow field need to be studied. In this paper, a novel three-phase fluidized bed flotation column (TFC) was designed, and the shear effect of liquid velocity (0.198 m/s, 0.226 m/s, and 0.254 m/s) and static bed height (0.1 m, 0.2 m, and 0.3 m) on the bubbles in the mineralized flow field region was investigated and evaluated for the formation of bubbles by shear in laboratory and semi-industrial experiments. The results show that the increase in filling bed height has a very obvious strengthening effect on the reduction of bubble diameter, and after the filling bed height reaches a certain value, the filling bed height will weaken the effect of apparent gas velocity on bubble diameter. The apparent gas velocity has different influencing effects on bubble diameter, and under conditions of low water velocity, the increase in the apparent gas velocity contributes to the reduction of bubble diameter. The conclusions of this study are expected to optimize the operating parameters of the flotation mineralization process and enrich the study of TFC, which can provide a reference for the design of future TFC studies.

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Section: Introductionmentioning

confidence: 99%

Study of a Novel Fluidized Bed Flotation Column with Enhanced Bubble Dispersion

Yin,

Han,

Yang

et al. 2024

Minerals

Self Cite

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Characterization of Particle Fluidization in a New Type of Fluidized Bed Flotation Unit

Zhao,

2024

Asia-Pacific J Chem Eng

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Understanding the hydrodynamics of the bed layer in a fluidized bed is essential for optimizing and improving fluidized bed flotation units. This study proposes a fluidized bed flotation column that incorporates auxiliary particles into the gas–liquid two‐phase system to address the shortcomings of traditional flotation units. Stainless steel particles (glass beads), tap water, and compressed air were used as the solid, liquid, and gas phases, respectively. Key factors affecting the bed hydrodynamics (such as bed fluctuation, minimum fluidization velocity, bed expansion, and porosity) in the fluidized column include gas and liquid flow rates as well as the initial bed height. Experimental results show that selecting appropriate filling particles can effectively enhance the fluidization performance of the bed, while appropriately increasing the gas flow rate can achieve fluidization at lower liquid velocities, thus reducing energy consumption during the flotation mineralization process. Theoretical analysis combined with extensive data reveals that the expansion characteristics of the fluidized bed and the use of high‐density filling particles can effectively mitigate bed layer fluctuations and stabilize the flow field environment. Additionally, based on a wide range of data, this study employs model factor analysis, dimensionless analysis, and multiple linear regression analysis to propose a standard dimensionless parameter model for the fluidized bed flotation column, which can effectively predict bed layer fluctuations and expansion characteristics.

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