Computational fluid dynamics (CFD) numerical simulation and particle image velocimetry (PIV) measurement of a packed flotation column

• Autorzy: Yan X. , Chen Z. , Wang L.

Identyfikatory

DOI

10.5277/ppmp1827

• Języki publikacji: EN

Abstrakty

EN

Packing is a useful method to obtain a static separation environment for a high flotation recovery and selectivity. In this study, the single-phase flow field in a packed lab-scale cyclonic-static microbubble flotation column (FCSMC) was investigated by computational fluid dynamics (CFD) simulation. Turbulence model was verified by Particle Image Velocimetry (PIV) experiment; the simulation results obtained by the RSM (Reynolds Stress Model) are closer to the experimental data. Based on this validation, RSM turbulence model was used to obtain the effect of sieve-plate on the hydrodynamic characteristics in the column flotation zone. The results show that the sieve-plate packing arrangement greatly straightens the rotation flow and decreases the turbulence. To further improve the effect of packing, two layers of sieve plates were used, and one diameter (1D = 190 mm) was selected as the reasonable distance between the two layers of sieve plates. To quantitative evaluate the effect of sieve-plate packing, the logarithm of Pdk over the logarithm of Pdo was calculated based on the volume-averaged turbulence dissipation rate, increasing from 24.72 for one layer of sieve-plate packing to 216.96 for two layers of sieve-plate packing. The probability of detachment significantly decreased for two layers of sieve-plate packing, and the recovery efficiency was significantly improved.

Słowa kluczowe

EN

cyclonic-static microbubble flotation column; computational fluid dynamics; sieve-plate packing; particle image velocimetry; velocity distribution

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2018
• Tom: Vol. 54, iss. 2
• Strony: 395--405
• Opis fizyczny: Bibliogr. 26 poz., rys., tab.

Twórcy

autor

Yan X.

• School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, 221116 Jiangsu, China
• National Engineering Research Center of Coal Preparation & Purification, Xuzhou, Jiangsu, China

autor

Chen Z.

• School of Electrical and Power engineering, China University of Mining & Technology, Xuzhou, 221116 Jiangsu, China

autor

Wang L.

• School of Electrical and Power engineering, China University of Mining & Technology, Xuzhou, 221116 Jiangsu, China
• National Engineering Research Center of Coal Preparation & Purification, Xuzhou, Jiangsu, China

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).