Particle capture of special cross-section matrices in axial high gradient magnetic separation: A 3D simulation

Xue, Zixing; Wang, Yuhua; Zheng, Xiayu; Lu, Dongfang; Li, Xudong

doi:10.1016/j.seppur.2019.116375

Cited by 40 publications

(7 citation statements)

References 46 publications

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“…Consequently, the background magnetic induction of 0.8 T was preferred for optimal concentration. It is well known that, in the PHGMS process, the main forces affecting the particles are the magnetic, gravitational, and drag forces (Yavuz et al, 2006;Zheng et al, 2015). As the particle size decreases, the effect of some forces can be reduced compared to other dominant forces.…”

Section: Effect Of Background Magnetic Inductionmentioning

confidence: 99%

“…Pulsating high-gradient magnetic separation (PHGMS) is a highly efficient, economical, and environmentally friendly technology for removing weakly magnetic particles from various ores (Padmanabhan and Sreenivas, 2011;Zeng et al, 2019;Zeng et al, 2019;Xue et al, 2020;Dai et al, 2022). However, it is not satisfactory when dealing with this kind of ultra-fine ilmenite tailings under regular operating conditions, just as they operate in the Panzhihua region.…”

Section: Introductionmentioning

confidence: 99%

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Enhancing PHGMS performance for recovery of ultra-fine ilmenite from tailings

Ahmed,

Li,

Xue

et al. 2024

Physicochem. Probl. Miner. Process.

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In southwest China, the Panzhihua area annually produces about 80 million tons of tailings with a TiO2 grade of around 5.0%, which causes serious waste of titanium resources as well as environmental and safety issues. The ilmenite contained in these tailings is ultra-fine in size, so it is difficult to recover under the regular operating conditions of pulsating high gradient magnetic separation (PHGMS). In this study, an SLon-100 PHGMS separator was applied to concentrate an ultra-fine titanium tailing under a wide range of operating conditions. The experimental results indicated that a combination of high pulsating frequency, large pulsating stroke, and low feed velocity was favorable for the highly efficient recovery of ultra-fine ilmenite from the tailings. The TiO2 grade in the optimal concentrate was enhanced from 4.33% to 13.64%, at a recovery of 66.55% and an enrichment ratio of 3.15 through a one-stage PHGMS process. The size analysis of the optimal concentrate showed that the TiO2 recovery in -25+18 µm and -18+10 µm fractions exceeded 70%. To further understand this PHGMS performance, the optimal ultra-fine ilmenite and larger-size ilmenite concentration conditions were compared. This study provides a valuable reference in the PHGMS operation for recovering ultra-fine weakly magnetic minerals, including ilmenite.

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Section: Effect Of Background Magnetic Inductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancing PHGMS performance for recovery of ultra-fine ilmenite from tailings

Ahmed,

Li,

Xue

et al. 2024

Physicochem. Probl. Miner. Process.

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“…On this basis, magnetic separation has been developed to allow the gathering of materials using magnetic assistance several decades ago [249,250]. More interestingly, a high gradient magnetic separation (HGMS) is a common technique for magnetic separation [251][252][253][254][255][256]]. An HGMS system comprises of magnetically susceptible matrices installed inside an electromagnet, and magnetic matrices play an important role in the performance of the system.…”

Section: Magnetic Separationmentioning

confidence: 99%

Advances in 3D printing of magnetic materials: Fabrication, properties, and their applications

et al. 2022

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Magnetic materials are of increasing importance for many essential applications due to their unique magnetic properties. However, due to the limited fabrication ability, magnetic materials are restricted by simple geometric shapes. Three-dimensional (3D) printing is a highly versatile technique that can be utilized for constructing magnetic materials. The shape flexibility of magnets unleashes opportunities for magnetic composites with reducing post-manufacturing costs, motivating the review on 3D printing of magnetic materials. This paper focuses on recent achievements of magnetic materials using 3D printing technologies, followed by the characterization of their magnetic properties, which are further enhanced by modification. Interestingly, the corresponding properties depend on the intrinsic nature of starting materials, 3D printing processing parameters, and the optimized structural design. More emphasis is placed on the functional applications of 3D-printed magnetic materials in different fields. Lastly, the current challenges and future opportunities are also addressed.

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“…In the terms of matrix shape, cylindrical magnetic matrices with a circular cross-section are often used in HGMS systems, while magnetic matrices with other special cross-section shapes have also received attention (Zheng et al 2016, Xue et al 2020a, 2020b, Xia et al 2021. For instance, Xue et al (2020a) explored the particle capture performance by magnetic matrices with four cross sections (circular, elliptic, square and diamond cross-section) in an axial HGMS system by using three-dimensional numerical simulations, and made a quantitative comparison, showing that the particle capture cross section of the elliptic and diamond matrices is larger than that of the square and elliptic matrices when the applied magnetic field is less than 1.1 T, while the particle capture cross section of the four types of matrices is similar when the applied magnetic field is greater than 1.1 T. In addition to shape, the effect of matrix size on the capture process was also investigated (Padmanabhan et al 2011, Zheng et al 2015, Zheng et al 2017. For instance, Zheng et al (2015) numerically demonstrated that the capture radius decreases rapidly with the increase of matrices size, where matrices of small size have larger capture radius and present higher capture efficiency under the same packing fraction as matrices of large size.…”

Section: Introductionmentioning

confidence: 99%

Effect of the number of magnetic matrices on particle capture in high gradient magnetic separation

Tian,

Cao

2023

J. Phys. D: Appl. Phys.

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A comprehensive understanding of the capture process involving matrices in high gradient magnetic separation (HGMS) is crucial for the design and improvement of matrix performance. However, few existing studies have paid attention to the influence of the number of magnetic matrices on the capture process. In this work, we numerically investigate this issue in both longitudinal and transversal HGMS systems, where multiple scenarios with different particle sizes, flow rates and matrix spacing are considered. Interestingly, we show that in most cases, increasing the number of magnetic matrices along the flow direction has little to no influence on the capture radius. It has a certain effect on improving the capture radius only in a few specific cases, such as when dealing with large particles at low flow rates with closely spaced matrices or when working with small particles at high flow rates with widely spaced matrices. These phenomena are related to the appearance of repulsive magnetic forces around matrices and the distribution characteristics of magnetic forces. The obtained results indicate that, in the design of the practical HGMS system, simply increasing the number of matrices along the flow direction may not be a reasonable or effective strategy for enhancing capture performance.

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Particle capture of special cross-section matrices in axial high gradient magnetic separation: A 3D simulation

Cited by 40 publications

References 46 publications

Enhancing PHGMS performance for recovery of ultra-fine ilmenite from tailings

Enhancing PHGMS performance for recovery of ultra-fine ilmenite from tailings

Advances in 3D printing of magnetic materials: Fabrication, properties, and their applications

Effect of the number of magnetic matrices on particle capture in high gradient magnetic separation

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