scholarly journals Development and Application Characteristics of High Gradient Magnetic Separator

2022 ◽  
Vol 2160 (1) ◽  
pp. 012057
Author(s):  
Purong Wang ◽  
Guoyin Xu
Keyword(s):  
High Intensity ◽  
Fine Particle ◽  
Magnetic Particles ◽  
Magnetic Separator ◽  
High Gradient Magnetic Separation ◽  
High Gradient ◽  
Particle Processing ◽  
Development Direction ◽  
New Type ◽  
Application Characteristics

Abstract As one of the most effective techniques for fine particle processing, high gradient magnetic separation is mainly used in the separation and enrichment of fine and weak magnetic particles and other important industrial fields. High gradient magnetic separator is a new type of high intensity magnetic separator, which has strong ability to capture fine and weak magnetic particles, developed on the basis of ordinary high intensity magnetic separator. Based on the early periodic- high -gradient magnetic separators, the optimization development direction of high gradient magnetic separators and their application characteristics of various high gradient magnetic separators in these decades were summarized, and the future development directions of high gradient magnetic separator were presented.

A High-Gradient Magnetic Separation System for Separating Magnetic Nanobeads from Aqueous Solution

2012 ◽  
Vol 505 ◽  
pp. 39-43
Author(s):  
Xiao Fei Yan ◽  
Jian Han Lin ◽  
Rong Hui Wang ◽  
Mao Hua Wang ◽  
Dong An ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Magnetic Separation ◽  
Flow Rate ◽  
Separation System ◽  
Magnetic Separator ◽  
High Gradient Magnetic Separation ◽  
High Gradient ◽  
Separation Time ◽  
Electronic Timer ◽  
Magnetic Nanobeads

Magnetic separation is an emerging and promising technology in biological sample preparation. In this paper, a high-intensity and high-gradient magnetic separation system was developed to separate magnetic nanobeads from aqueous solution. This system mainly consisted of a magnetic separator, a micropump and an electronic timer. The magnetic separator was designed by placing two columns of permanent magnets in an aluminum holder. Two magnets in each column were laid out in repelling mode and a hole between the two columns was used to accommodate a 1.5 ml tube. Working with the electronic timer, the micropump was employed to remove waste solution at a certain rate after magnetic nanobeads captured onto the sides of the tube wall. The experiments for separation of magnetic nanobeads with diameters of 150 nm and 50 nm using the developed magnetic separation system were conducted to optimize the key parameters of the system including nanobeads concentration, separation time and flow rate. The separation efficiencies of magnetic nanobeads increased as the nanobeads concentration and the separation time increased, whereas decreased when the flow rate was increased. Experimental results proved that the proposed magnetic separation system was able to separate magnetic nanobeads (diameters of 150 nm and 50 nm) with separation efficiencies of 99% and 90% in 30 min and 150 min respectively.

Purification of Refractories Andalusite of High Quality

2013 ◽  
Vol 443 ◽  
pp. 609-612
Author(s):  
Jun Xun Jin ◽  
Hui Min Gao ◽  
Jun Fang Guan ◽  
Xiao Fei Feng
Keyword(s):  
Magnetic Separation ◽  
Isoelectric Point ◽  
Refractory Materials ◽  
High Quality ◽  
Magnetic Separator ◽  
High Gradient Magnetic Separation ◽  
High Gradient ◽  
Petroleum Sulfonate ◽  
Developing Trend ◽  
Flotation Cell

It is a developing trend for the refractory materials industry that producing refractories using the andalusite ore with minute amounts of titanium. The tests were conducted with an ore sample by a high gradient magnetic separator and a mechanical flotation cell. The isoelectric point of the andalusite ore was found to be pH 5.9. Petroleum sulfonate was found to be an effective collector for andalusite flotation. 52.08% Al2O3 is produced with 52.92% andalusite recovery by grinding, desliming, high gradient magnetic separation and andalusite flotation.

Vortex magnetic separation

1997 ◽  
Vol 211 (1) ◽  
pp. 31-42 ◽  
Author(s):  
J L S Watson ◽  
Z Li
Keyword(s):  
Magnetic Separation ◽  
Magnetic Particles ◽  
Effluent Treatment ◽  
Magnetic Fraction ◽  
High Gradient Magnetic Separation ◽  
High Gradient ◽  
Downstream Side ◽  
The Matrix ◽  
Magnetic Product ◽  
The Wire

Vortex magnetic separation (VMS) is a new technique (1-3) which can not only greatly increase selectivity of high gradient magnetic separation but can also provide a much higher material throughput because high slurry velocity is used. This technique will have a wide range of applications in fields as diverse as mineral processing, biochemical engineering, sewage and wastewater treatment and industrial effluent treatment. At present in high gradient magnetic separation (HGMS) low Reynolds numbers (with respect to the wire diameter) are usually used and the magnetic product is captured on the upstream side of the wire matrix which results in a serious mechanical entrainment problem that is very detrimental to the purity of the magnetic fraction and to the reduction of the quantity of non-magnetic fraction (4). Vortex magnetic separation runs at moderate Reynolds number ( Re = 6–40) which leads to the formation of vortex flow in the neighbourhood of the matrix. Magnetic particles in the slurry are first concentrated in the boundary layer flow around the matrix and then brought into the magnetically attractive area on the matrix downstream side. The magnetic deposit on the downstream side of the matrix does not suffer the direct collisions with non-magnetic particles in the slurry, so the quality of the magnetic product is drastically improved. As will be described below, a new invention has been made with regard to the VMS matrix which allows capture to take place on both the upstream and downstream sides of the matrix without mechanical entrainment. This paper reviews experimental and theoretical work on the mechanisms involved in vortex magnetic separation.

Investigation of Combination of Variable Diameter Rod Elements in Rod Matrix on High Gradient Magnetic Separation Performance

2014 ◽  
Vol 1030-1032 ◽  
pp. 1193-1196 ◽  
Author(s):  
Li Ding ◽  
Lu Zheng Chen ◽  
Jian Wu Zeng
Keyword(s):  
Magnetic Separation ◽  
Magnetic Particles ◽  
Decisive Role ◽  
Matrix Analysis ◽  
Separation Performance ◽  
High Gradient Magnetic Separation ◽  
High Gradient ◽  
Variable Diameter ◽  
Oxidized Iron ◽  
Weakly Magnetic

Rod matrix is effectively applied to separate fine weakly magnetic particles in pulsating high gradient magnetic separation (PHGMS), due to its reliable operation, simple combination and resistance to mechanical entrainment. They are now used to beneficiate oxidized iron ores, ilmenite, and wolframite, etc., and to purify wastewater. The combination of variable diameters rod elements in rod matrix plays a decisive role in recovery most of the different size fractions of magnetic particles, thus generating a significant influence on the performance of PHGMS. Combination of variable diameter rod elements in rod matrix on PHGMS is investigated in combination of 3 mm and 2 mm rod elements in rod matrix, by Slice-Matrix Analysis (SMA); it was found that the recovery of combinatorial rod matrix is higher than single diameter of matrix on PHGMS.

Effect of Feed Solids on High Gradient Magnetic Separation of Cylindrical Magnetic Matrix

2014 ◽  
Vol 881-883 ◽  
pp. 1634-1637
Author(s):  
Ding Li ◽  
Lu Zheng Chen ◽  
Jian Xiong Huang ◽  
Jian Wu Zeng
Keyword(s):  
Magnetic Separation ◽  
Magnetic Particles ◽  
Decisive Role ◽  
Matrix Analysis ◽  
High Gradient Magnetic Separation ◽  
High Gradient ◽  
Matrix Layer ◽  
The Matrix ◽  
Single Matrix ◽  
The Magnetic Field

Cylindrical magnetic medium (rod matrix) serves as the carrier for magnetic particles in pulsating high gradient magnetic separation (PHGMS), which has been widely applied to beneficiate hematite, ilmenite, limonite, siderite, wolframite, etc., in the mineral processing industry and to purify wastewater. The arrangement of rod elements in the matrix plays a decisive role in the magnetic field distribution and in the movement of particles in the matrix, thus generating a significant influence on the performance of PHGMS. The effect of feed solids on PHGMS is investigated in the 3 mm rod matrix of different spacings between rods in a single matrix layer, by Slice-Matrix Analysis; it was found that there is a maximum feed solids for a given matrix; beyond this feed solids, the performance of PHGMS deteriorates significantly.

scholarly journals Recovery of Metals from Heat-Treated Printed Circuit Boards via an Enhanced Gravity Concentrator and High-Gradient Magnetic Separator

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4566
Author(s):  
Yushuai Xian ◽  
Youjun Tao ◽  
Fangyuan Ma ◽  
You Zhou
Keyword(s):  
Heat Treatment ◽  
Printed Circuit Boards ◽  
Gravity Separation ◽  
Circuit Boards ◽  
Magnetic Separator ◽  
High Gradient Magnetic Separation ◽  
High Gradient ◽  
Printed Circuit ◽  
Waste Printed Circuit Boards ◽  
Enhanced Gravity Separation

The recovery and reuse of waste printed circuit boards (PCBs) has attracted more and more attention from global researchers, as recycling of waste PCB metals is of great significance to the rational utilization of metal material resources. This study puts forward a clean and economical method in which enhanced gravity separation and wet high-gradient magnetic separation were combined to recover waste PCBs with heat treatment at a temperature of 240 °C. The heat treatment could improve the metal liberation effect of the PCBs, and the thermal behavior was measured by thermogravimetric analysis (TGA). The pyrolysis of the non-metal fraction (NMF) began around 300 °C, and the glass transition temperature of epoxy resin was 135.17 °C. The enhanced gravity separation technique was used for the separation of metals and NMF under the compound force field. The metals grade of the gravity concentrates fraction (GRF) was 82.97% under the optimal conditions, and the metals recovery reached 90.55%. A wet high-gradient magnetic separator was applied to classify the GRF into magnetic (MA) and non-magnetic (NMA) fractions, which could achieve iron and copper enrichment. After the three stages combined process, the copper and iron grades of the NMA and MA fractions were 70.17% and 73.42%, and the recovery reached 74.02% and 78.11%, respectively.

scholarly journals Removal of Arsenic from Geothermal Water by using High Intensity Field and High Gradient Magnetic Separation

2005 ◽  
Vol 125 (7) ◽  
pp. 701-708 ◽  
Author(s):  
Hidehiko Okada ◽  
Kazunari Mitsuhashi ◽  
Yasuo Kudoh ◽  
Hiroshi Nakazawa ◽  
Eiji Fujiwara ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
High Intensity ◽  
Geothermal Water ◽  
High Gradient Magnetic Separation ◽  
High Gradient ◽  
Intensity Field ◽  
Removal Of Arsenic
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