Stable buildup of particles in a vibrating-pulsating high gradient magnetic separator: A simulation study

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-05-24 DOI:10.1016/j.powtec.2025.121164

Zixing Xue , Rongjie Zhu , Ning Wu , Shuo Li , Tao Xiong , Luzheng Chen

{"title":"Stable buildup of particles in a vibrating-pulsating high gradient magnetic separator: A simulation study","authors":"Zixing Xue , Rongjie Zhu , Ning Wu , Shuo Li , Tao Xiong , Luzheng Chen","doi":"10.1016/j.powtec.2025.121164","DOIUrl":null,"url":null,"abstract":"<div><div>Vibrating-pulsating high gradient magnetic separation (VPHGMS) is a new technology developed from pulsating high gradient magnetic separation (PHGMS). It has higher selectivity than PHGMS due to the introduction of vibration into the matrix. However, previous research mainly focused on the separation performance of VPHGMS through experiments; few studies have concerned about its separation mechanism. In this study, a 2D simulation was applied to reveal the magnetic field distribution, flow field distribution, and particle buildup characteristics in a VPHGMS separator. It was found that the magnetic field distribution around the matrix did not change with the displacement of the matrix, but a much faster and stronger transformation of fluid velocity was observed in VPHGMS than in PHGMS. When the matrix was vibrating, some particles were able to follow its movement and occupied a stable buildup area in the upper and lower surfaces of the matrix. This area expanded with increasing magnetic field distribution, volume susceptibility, and diameter of particles, but shrank with increasing vibrating frequency. The selectivity of VPHGMS was also investigated by analyzing the separation performance on an idealized mixture of two minerals. The simulation results predicted a drop in recovery and an enhancement in selectivity under increased vibrating frequency, which was consistent with experimental results from former studies.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"463 ","pages":"Article 121164"},"PeriodicalIF":4.5000,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Powder Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0032591025005595","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Vibrating-pulsating high gradient magnetic separation (VPHGMS) is a new technology developed from pulsating high gradient magnetic separation (PHGMS). It has higher selectivity than PHGMS due to the introduction of vibration into the matrix. However, previous research mainly focused on the separation performance of VPHGMS through experiments; few studies have concerned about its separation mechanism. In this study, a 2D simulation was applied to reveal the magnetic field distribution, flow field distribution, and particle buildup characteristics in a VPHGMS separator. It was found that the magnetic field distribution around the matrix did not change with the displacement of the matrix, but a much faster and stronger transformation of fluid velocity was observed in VPHGMS than in PHGMS. When the matrix was vibrating, some particles were able to follow its movement and occupied a stable buildup area in the upper and lower surfaces of the matrix. This area expanded with increasing magnetic field distribution, volume susceptibility, and diameter of particles, but shrank with increasing vibrating frequency. The selectivity of VPHGMS was also investigated by analyzing the separation performance on an idealized mixture of two minerals. The simulation results predicted a drop in recovery and an enhancement in selectivity under increased vibrating frequency, which was consistent with experimental results from former studies.

查看原文本刊更多论文

振动-脉动高梯度磁选机中颗粒稳定堆积的模拟研究

振动-脉动高梯度磁选技术是在脉动高梯度磁选技术的基础上发展起来的一种新技术。由于在基体中引入了振动，它比PHGMS具有更高的选择性。然而，以往的研究主要是通过实验研究VPHGMS的分离性能；很少有研究关注其分离机制。本文采用二维模拟的方法研究了VPHGMS分离器内的磁场分布、流场分布和颗粒堆积特性。结果表明，基体周围的磁场分布不随基体位移而变化，但流体速度的变化在VPHGMS中比在PHGMS中更快、更强。当基体振动时，一些颗粒能够跟随其运动，并在基体的上下表面占据稳定的堆积区。该区域随着磁场分布、体积磁化率和颗粒直径的增加而扩大，但随着振动频率的增加而缩小。通过对理想的两种矿物混合物的分离性能分析，考察了VPHGMS的选择性。模拟结果表明，随着振动频率的增加，采收率下降，选择性增强，这与以往的实验结果一致。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.