Performance evaluation of a hydrocyclone with a spiral rib for separation of particles

Patra, Gayatree; Velpuri, Bhargava; Chakraborty, Sudipto; Meikap, B.C.

doi:10.1016/j.apt.2017.10.002

Cited by 42 publications

(13 citation statements)

References 38 publications

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“…The maximum tangential velocity track forms a boundary between the forced vortex and quasi-free vortex. Therefore, when the diameter of the overflow pipe was increased, the inner forced 15…”

Section: Effect On Tangential Velocitymentioning

confidence: 99%

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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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Section: Effect On Tangential Velocitymentioning

confidence: 99%

“…Finally, three products were obtained: the overflow, the underflow, and the filtrate. Ghodrat [14,15] studied the configuration of the hydrocyclone conical section. The shape and length of the conical section of the hydrocyclone were investigated using the numerical method.…”

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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“…In the Reynolds Stress equation Model (RSM) components of each stress are obtained by solving the Reynolds Stress equation. The RSM was selected as the turbulence model in this study [23][24][25][26][27][28][29].…”

Section: Selection Of Turbulence Model and Multi-phase Flow Modelmentioning

confidence: 99%

The Study on Numerical Simulation and Experiments of Four Product Hydrocyclone with Double Vortex Finders

et al. 2018

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A hydrocyclone is an instrument that can effectively separate multi-phase mixtures of particles with different densities or sizes based on centrifugal sedimentation principles. However, conventional hydrocyclones lead to two products only, resulting in an over-wide particle size range that does not meet the requirements of subsequent operations. In this article, a two-stage series, a four product hydrocyclone is proposed. The first stage hydrocyclone is designed to be a coaxial double overflow pipe: under the effect of separation, fine particles are discharged from the internal overflow pipe, while medium-size particles are discharged from external overflow pipe before entering the second stage hydrocyclone for fine sedimentation. In other words, one-stage grading leads to four products, including the first stage underflow, the first stage overflow, the second stage underflow, and the second stage overflow. The effects of structural parameters and operational parameters on flow field distribution in hydrocyclone were investigated via a study of flow field distribution in multi-product hydrocyclones using numerical simulations. The application of four product hydrocyclone in iron recovery shows that the grade and recovery of iron concentrate exceed 65.08% and 86.14%, respectively. This study provides references for understanding the flow field distribution in hydrocyclones and development of multi-product grading instrument in terms of both theory and industrial applications.

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“…The influence of structural parameters of a hydrocyclone on separation performance has been widely reported. Representative studies focus mainly on the cylindrical section of the hydrocyclone [10,11], the overflow pipe [12][13][14], the feed inlet [15][16][17], the underflow orifice [18][19][20][21], and the cone angle [20,22,23]. Numerical simulation and experimental methods obtain the effect of structural parameters on separation performance, providing an important theoretical reference for the structural optimization of the hydrocyclone.…”

Section: Introductionmentioning

confidence: 99%

Sediment-Containing Sewage Separation Using Intermittent-Discharge Columnar Hydrocyclones

Zhang

Yang

Liu

2020

Water

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Traditional hydrocyclones can be used for the concentration of sewage-containing sediments, but the low underflow concentration and the high content of fine particles result in a large subsequent dehydration workload. This study aimed to investigate the effect of columnar hydrocyclone column height on separation performance and the change in the internal flow field after the underflow orifice of the hydrocyclone was closed, so as to provide a theoretical basis for improving the ability to treat the sewage of the hydrocyclone. Numerical simulation was used to examine the change in the separation performance of the hydrocyclone and the effect of column height on the separation performance of the hydrocyclone in the case of the closed underflow orifice during intermittent discharging. The results indicate that a proper increase in column height was beneficial to improve the separation performance of the hydrocyclone. With the increase in the closing time of the underflow orifice, the particle content at the bottom of the hydrocyclone increased significantly. The experiment proves the feasibility of the intermittent discharge method in practice, and this working method can effectively increase the underflow concentration.

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Performance evaluation of a hydrocyclone with a spiral rib for separation of particles

Cited by 42 publications

References 38 publications

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

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

The Study on Numerical Simulation and Experiments of Four Product Hydrocyclone with Double Vortex Finders

Sediment-Containing Sewage Separation Using Intermittent-Discharge Columnar Hydrocyclones

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