首页|Particulate flow modelling in a spiral separator by using the Eulerian multi-fluid VOF approach

Particulate flow modelling in a spiral separator by using the Eulerian multi-fluid VOF approach

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The Euler-Euler model is less effective in capturing the free surface of flow film in the spiral separator,and thus a Eulerian multi-fluid volume of fluid(VOF)model was first proposed to describe the particulate flow in spiral separators.In order to improve the applicability of the model in the high solid concentration system,the Bagnold effect was incorporated into the modelling framework.The capability of the pro-posed model in terms of predicting the flow film shape in a LD9 spiral separator was evaluated via com-parison with measured flow film thicknesses reported in literature.Results showed that sharp air-water and air-pulp interfaces can be obtained using the proposed model,and the shapes of the predicted flow films before and after particle addition were reasonably consistent with the observations reported in lit-erature.Furthermore,the experimental and numerical simulation of the separation of quartz and hema-tite were performed in a laboratory-scale spiral separator.When the Bagnold lift force model was considered,predictions of the grade of iron and solid concentration by mass for different trough lengths were more consistent with experimental data.In the initial development stage,the quartz particles at the bottom of the flow layer were more possible to be lifted due to the Bagnold force.Thus,a better predicted vertical stratification between quartz and hematite particles was obtained,which provided favorable conditions for subsequent radial segregation.

Spiral separatorComputational fluid dynamics(CFD)Eulerian multi-fluid VOF modelBagnold effectParticulate flow

Lingguo Meng、Shuling Gao、Dezhou Wei、Qiang Zhao、Baoyu Cui、Yanbai Shen、Zhenguo Song

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School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China

State Key Laboratory of Mineral Processing,Beijing 100160,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaOpen Foundation of State Key Laboratory of Mineral ProcessingFundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities

5197406552274257BGRIMM-KJSKL-2020-13N2201008N2201004

2023

矿业科学技术学报(英文版)
中国矿业大学

矿业科学技术学报(英文版)

CSTPCDCSCD北大核心EI
影响因子：1.222
ISSN：2095-2686
年,卷(期)：2023.33(2)
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