Novel conical section design for ultra-fine particles classification by a hydrocyclone

Ye, Junxiang; Xu, Yanxia; Song, Xingfu; Yu, Jianguo

doi:10.1016/j.cherd.2019.02.006

Cited by 49 publications

(17 citation statements)

References 48 publications

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“…The main settings of the RSM, VOF, and TFM models applied herein are summarized in Table 1, and more details of these models can be found in the literature. 55,56 Figure 1 illustrates the present Eulerian−Eulerian simulation strategy. First, the multiphase flow field of the water−air is established.…”

Section: Cfd Simulation Methods 211 Simulation Modelmentioning

confidence: 99%

“…The drift velocity u dr, ki is achieved from the algebraic model u dr , italicki = ( ρ k − ρ m ) d k 2 18 μ 1 f normald normalr normala normalg a k , i − η t σ t true( ∇ α k α k − ∇ α 1 α 1 true) − ∑ k = 1 n α k ρ k u 1 k , i ρ normalm where η t is the turbulent diffusivity, σ t is the Prandtl/Schmidt number and set to 0.75, a k,I is the acceleration of phase k , and d k is the bubble and particle diameter of phase k. f drag is the drag force function for the secondary phase. The main settings of the RSM, VOF, and TFM models applied herein are summarized in Table , and more details of these models can be found in the literature. , …”

Section: Methodsmentioning

confidence: 99%

“…The main settings of the RSM, VOF, and TFM models applied herein are summarized in Table 1 , and more details of these models can be found in the literature. 55 , 56 …”

Section: Methodsmentioning

confidence: 99%

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Classification of Ultrafine Particles Using a Novel 3D-Printed Hydrocyclone with an Arc Inlet: Experiment and CFD Modeling

Song

et al. 2022

ACS Omega

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Ultrafine particle classification can be realized using hydrocyclones with novel structures to overcome the limitations of conventional hydrocyclones with tangential inlets or cone structures. Herein, the hydrocyclones with different inlet structures and cone angles were investigated for classifying ultrafine particles. Computational fluid dynamics (CFD) simulations were performed using the Eulerian−Eulerian method, and ultrafine MnO 2 powder was used as a case study. The simulation results show a fine particle (≤5 μm) removal efficiency of 0.89 and coarse particle (>5 μm) recovery efficiency of 0.99 for a hydrocyclone design combining an arc inlet and a 30°cone angle under a solid concentration of 2.5 wt %. Dynamic analysis indicated that the novel arc inlet provided a preclassification effect to reduce the misplacement of fine/coarse particles, which cannot be provided by conventional tangential or involute inlets. Furthermore, the proposed design afforded comprehensive improvement in the flow field by regulating the residence time and radial acceleration. Subsequently, a novel hydrocyclone with an arc inlet and 30°cone angle was manufactured using the three-dimensional (3D) printing technology. Experiments were conducted for classifying ultrafine MnO 2 particles using the novel 3D-printed hydrocyclone and conventional hydrocyclone. The results demonstrate that the classification performance of the 3D-printed hydrocyclone was superior to that of the conventional one, in particular, the removal efficiency of fine particles from 0.719 to 0.930 using a 10 wt % feed slurry.

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Section: Cfd Simulation Methods 211 Simulation Modelmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Classification of Ultrafine Particles Using a Novel 3D-Printed Hydrocyclone with an Arc Inlet: Experiment and CFD Modeling

Song

et al. 2022

ACS Omega

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“…The principle of gravitational classifiers is based on the fact that the particles suspended in a flowing fluent, usually air or water, move towards different points under the influence of different forces, so that they can be separated from one another [18,19]. Particles experience gravity and drag forces acting in opposite directions.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on Performance and Structural Improvements of a Novel Elutriator

et al. 2021

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During the transportation and packaging of low density polyethylene (LDPE) granular materials, fine dusts such as floccules, powder and fiber will be produced, which pollute the environment, affect product quality and generate fire hazards. In this work, the separation performance of fine dust and optimal operating conditions of an improved elutriator were investigated experimentally. Experiments were carried out to investigate the effects of air speed, feeding speed, and grid layout on the removal efficiency of fine particles. Experimental data showed that the separation efficiency of the novel elutriator ranged from 96% to 98.50%, which was more stable and an average of 51.44% higher than that of the original elutriator. By setting internals and improving the structure, the gas flow field in the equipment was regulated, the particle dispersion was intensified, and the static electricity was eliminated, which significantly improved the separation efficiency of fine dust.

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“…Jiang et al [18,19] carried out a detailed study to show that there were fewer fine particles in the underflows of hydrocyclones with parabolic cones, than in traditional hydrocyclones. To overcome ultrafine particle classification problems in traditional hydrocyclones, Ye et al [20] investigated the cross-section of a conical section and designed a multi-section composite cone. In our previous research, a new type of W-shaped hydrocyclone ( Figure 1) was proposed to address the problem of "fish-hook" [21].…”

Section: Introductionmentioning

confidence: 99%

Effect of Overflow Pipe on the Internal Flow Fields and Separation Performance of W-Shaped Hydrocyclones

et al. 2020

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The entrainment of fine particles in underflow of a grinding-classification hydrocyclone can cause ore overgrinding, which will lead to reductions in both metal recovery and ball mill throughput. To address this problem, this paper proposed a W-shaped hydrocyclone that can effectively reduce underflow fine particle entrainment. Experimental tests and numerical simulations were employed to deeply investigate overflow pipe diameter influence on the separation performance and internal flow field of W-shaped hydrocyclones. The effects of overflow pipe diameter on air core shape, velocity field, pressure field, and separation performance were studied. The results revealed that as the diameter of the overflow pipe increased, air core gradually stabilized, and air core diameter gradually increased. The diameter of stabilized air core was approximately 45% to 55% of overflow pipe diameter. As overflow pipe diameter increased, hydrocyclone pressure drop decreased, energy consumption was reduced, the tangential velocity decreased, outer vortex axial velocity did not change significantly, and inner vortex axial velocity gradually increased. At the same time, zero-velocity points gradually moved outward, and the inner vortex region expanded. By the increase of overflow pipe diameter, both the underflow yield and split ratio gradually decreased, the coarse particle content in the overflow product increased, and the fine particle content in the underflow product gradually decreased.

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Novel conical section design for ultra-fine particles classification by a hydrocyclone

Cited by 49 publications

References 48 publications

Classification of Ultrafine Particles Using a Novel 3D-Printed Hydrocyclone with an Arc Inlet: Experiment and CFD Modeling

Classification of Ultrafine Particles Using a Novel 3D-Printed Hydrocyclone with an Arc Inlet: Experiment and CFD Modeling

An Experimental Study on Performance and Structural Improvements of a Novel Elutriator

Effect of Overflow Pipe on the Internal Flow Fields and Separation Performance of W-Shaped Hydrocyclones

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