入料速度对浓密机内部流场特性以及絮凝浓密性能的影响

金属矿山 ›› 2025, Vol. 54 ›› Issue (11): 170-177.

入料速度对浓密机内部流场特性以及絮凝浓密性能的影响

王学涛¹　刘洋洋¹　蒋沂声¹　毛治然¹　邵宇晨¹　崔宝玉²　赵海舟³

1.沈阳理工大学材料科学与工程学院,辽宁沈阳 110159;2.东北大学资源与土木工程学院,辽宁沈阳 110819; 3.武穴市民本矿产资源开发有限公司,湖北武穴 435400

出版日期:2025-11-15 发布日期:2025-12-02
通讯作者: 刘洋洋(2002—),女,硕士研究生。
作者简介:王学涛(1990—),男,副教授,博士,硕士研究生导师。
基金资助:
辽宁省教育厅基本科研项目(编号:LJ212410144059);沈阳理工大学引进高层次人才项目(编号:1010147001204);辽宁省博士科研启动基金计划项目(编号:2025-BS-0357)。

Effect of Feed Velocity on the Internal Flow Field Characteristics and Flocculation Thickening Performance in a Thickener

WANG Xuetao¹　LIU Yangyang¹　JIANG Yisheng¹　MAO Zhiran¹　SHAO Yuchen¹ CUI Baoyu²　ZHAO Haizhou³

1.School of Materials Science and Engineering,Shenyang Ligong University,Shenyang 110159,China; 2.School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China; 3.Wuxue City Minben Mineral Resources Development Co.,Ltd.,Wuxue 435400,China

Online:2025-11-15 Published:2025-12-02

摘要/Abstract

摘要： 针对浓密机内微细矿物颗粒絮凝沉降效果不佳的问题,在物理试验验证基础上,基于CFD-PBM数值模拟耦合法,采用欧拉-欧拉法和RNG k-ε模型分别描述固液相间作用和湍流脉动,在不同入料速度条件下,对ϕ1.2 m 实验室型浓密机进行絮凝沉降模拟研究。研究结果表明,浓密机给料井内液相和固相的速度特性分布基本一致,且给料井进料口处浆体速度最大;入料速度显著影响浓密机内部流场及颗粒絮凝特性;随着入料速度的增加,湍流动能耗散率逐渐增加,而絮团平均粒径先增加后减小;当入料速度为1.5 m/s时,颗粒絮凝效果最好,且浓密机底流浓度较高(约为55%),满足实际生产需求,研究结果为浓密机入料速度优化提供了理论依据和实践指导。

关键词: 浓密机　流场特性　絮凝行为　数值模拟　入料速度

Abstract: Aiming at the problems of the poor flocculation and sedimentation effect of fine mineral particles in a thicken er,based on the validation of physical experiments,the flocculation and sedimentation behavior was simulated in a ϕ1.2 m lab scale thickener by CFD-PBM coupling method,where the Euler-Euler method and the RNG k-ε model were used to describe solid-liquid interaction and turbulence pulsation,respectively.The results show that the velocity characteristics of both liquid and solid phases within the feedwell of the thickener exhibit essentially consistent distributions and the velocity achieves the highest at the feed inlet.The feed velocity significantly affects the internal flow field and particle flocculation characteristics in the thickener.With the increase of feed velocity,the turbulent kinetic energy dissipation rate increases gradually,while the mean size of flocs firstly increases and then decreases;When the feed velocity is 1.5 m/s,the particles flocculation effect is better than that of other conditions,corresponding to the underflow concentration of about 55% for the thickener,which meets the production needs.The results of this study provide a theoretical basis and practical guidance for the optimization of feed ve locity for the thickener.

Key words: thickener,flow characteristics,flocculation behavior,numerical simulation,feed velocity

中图分类号:

TD462.5

王学涛　刘洋洋　蒋沂声　毛治然　邵宇晨　崔宝玉　赵海舟. 入料速度对浓密机内部流场特性以及絮凝浓密性能的影响[J]. 金属矿山, 2025, 54(11): 170-177.

WANG Xuetao　LIU Yangyang　JIANG Yisheng　MAO Zhiran　SHAO Yuchen CUI Baoyu　ZHAO Haizhou. Effect of Feed Velocity on the Internal Flow Field Characteristics and Flocculation Thickening Performance in a Thickener[J]. Metal Mine, 2025, 54(11): 170-177.

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