利用微磁模拟精确计算磁性矿物颗粒上的磁力

IF 4.9 2区 工程技术 Q1 ENGINEERING, CHEMICAL Minerals Engineering Pub Date : 2024-09-23 DOI:10.1016/j.mineng.2024.109001
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引用次数: 0

摘要

磁选是铁矿石加工的主要方法,在当前的选矿实践和其他领域都发挥着至关重要的作用。人们对磁性颗粒在磁选设备中的运动行为进行了大量研究。然而,在处理形状不规则的颗粒时,力分析,特别是磁力计算,仍然不够精确。准确预测磁性颗粒的行为需要精确的磁力计算。本研究引入了微磁模拟,以精确计算不规则磁性颗粒的磁力。微磁模拟可以确定粒子每个微元素内的精确磁矩和磁感应强度。这些模拟结果将通过磁力显微镜(MFM)进行验证。研究结果表明,传统的磁力计算与本研究提出的精确计算存在偏差。对于不规则粒子,与球形粒子相比,排斥力和吸引力的计算误差分别高出 770% 和 576%。这强调了在实际磁力计算中考虑粒子形状的必要性。此外,MFM 测量图像和模拟磁力图都显示出与粒子形状相关的亮区和暗区,这表明微磁模拟结果可以通过 MFM 测量得到验证。本文提出了一种可通过实验验证的方法,利用微磁模拟准确计算磁性粒子上的磁力,这对设计更高效、更精确的磁分离设备具有重要意义。
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Accurate calculation of magnetic forces on magnetic mineral particles using micromagnetic simulations
Magnetic separation is a primary method for processing iron ore and plays a crucial role in both current beneficiation practices and other fields. Extensive research has been conducted on the motion behavior of magnetic particles within magnetic separation equipment. However, force analysis, particularly the calculation of magnetic forces, remains imprecise when dealing with irregularly shaped particles. Accurate prediction of magnetic particle behavior requires precise magnetic force calculations. This study introduces micromagnetic simulations to accurately compute the magnetic forces on irregular magnetic particles. Micromagnetic simulations can determine the precise magnetic moments and magnetic induction intensities within each microelement of the particle. The results of these simulations will be validated using magnetic force microscopy (MFM). The findings indicate that traditional magnetic force calculations deviate from the precise calculations presented in this study. For irregular particles, the computational errors in repulsive and attractive forces are 770% and 576% higher, respectively, compared to spherical particles. This underscores the necessity of considering particle shape in realistic magnetic force calculations. Additionally, both the MFM measurement images and the simulated magnetic force maps exhibit bright and dark regions correlated with particle shape, demonstrating that micromagnetic simulation results can be verified through MFM measurements. This paper proposes an experimentally verifiable method for accurately calculating the magnetic forces on magnetic particles using micromagnetic simulations, which holds significant implications for designing more efficient and precise magnetic separation equipment.
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来源期刊
Minerals Engineering
Minerals Engineering 工程技术-工程:化工
CiteScore
8.70
自引率
18.80%
发文量
519
审稿时长
81 days
期刊介绍: The purpose of the journal is to provide for the rapid publication of topical papers featuring the latest developments in the allied fields of mineral processing and extractive metallurgy. Its wide ranging coverage of research and practical (operating) topics includes physical separation methods, such as comminution, flotation concentration and dewatering, chemical methods such as bio-, hydro-, and electro-metallurgy, analytical techniques, process control, simulation and instrumentation, and mineralogical aspects of processing. Environmental issues, particularly those pertaining to sustainable development, will also be strongly covered.
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