scholarly journals Magnetic scavenging of ultrafine hematite from itabirites

2013 ◽  
Vol 66 (4) ◽  
pp. 499-505 ◽  
Author(s):  
Maximiliano Batista da Silva ◽  
José Aurélio Medeiros da Luz
Keyword(s):  
Magnetic Field ◽  
Pilot Study ◽  
Magnetic Separation ◽  
Field Intensity ◽  
Mass Concentration ◽  
Mineral Resources ◽  
Mining Activities ◽  
Magnetic Separator ◽  
High Gradient ◽  
Quadrilátero Ferrífero

Magnetic separation has gained force with the advent of high gradient and field intensity continuous machines. A comparative pilot study was realized in order to magnetically recover hematite from a typical slime thickener underflow of a mill plant from Quadrilátero Ferrífero (Minas Gerais, Brazil). Two rotor (carrousel) high gradient magnetic separators (tagged as W1 and W2) and one vertical ring and pulsating high gradient magnetic separator (tagged as V) were tested. The best option was the machine W2 with field of 1.2 T, feed mass concentration of 35 %, and middlings flush water of 300 kPa. The more indicated for the cleaner step is the use of a magnetic field of 1.2 T, generating a concentrate with 5.48% of SiO2 and 62.75% of mass recovery. So, the relevance of this research also stems from the fact that it can subsidize other studies in order to face analogous problems in this context of intense mining activities in a region of such vast mineral resources.

Recovering Iron from Red Mud with High Gradient Magnetic Separator

2014 ◽  
Vol 644-650 ◽  
pp. 5447-5450
Author(s):  
Peng Xiang Zhang ◽  
Xing Long Zhou ◽  
Chang Cheng Shang Guan ◽  
Xu Bai
Keyword(s):  
Magnetic Field ◽  
Phase Analysis ◽  
Field Intensity ◽  
Red Mud ◽  
Magnetic Field Intensity ◽  
Magnetic Media ◽  
Element Analysis ◽  
Magnetic Separator ◽  
High Gradient ◽  
Iron Concentrate

Based on the XRF analysis of red mud, the Muti-element analysis of red mud and the phase analysis of iron, high gradient magnetic separators were used for recovering iron from red mud. Magnetic field intensity, magnetic media, velocity of flow and frequency were researched. Magnetic field intensity as 0.85T, Magnetic media as 2.0mm, velocity of flow as 8L/min and frequency of stroke as 200/min, at this condition, the grade of iron concentrate is 44.56% and the recovery is 73.69%.

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.

scholarly journals Magnetic Field Effect in the Process of Rinsing a Magnetic Separator Matrix

1988 ◽  
Vol 2 (3) ◽  
pp. 119-136
Author(s):  
Jiri Galas
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Circuit Design ◽  
Field Effect ◽  
Magnetic Circuit ◽  
Magnetic Field Effect ◽  
Magnetic Separator ◽  
High Gradient ◽  
First Time

This paper surveys fundamental aspects of the problem of rinsing matrices in high gradient magnetic separators. This is done, for the first time, in terms of the magnetic circuit design. Equations have been constructed to describe the effects of spurious remanent magnetic fields on the rinsing process.

Preconcentration Research on Mineral Processing for a Extremely Lean Iron Ore in Inner Mongolia

2012 ◽  
Vol 454 ◽  
pp. 227-230
Author(s):  
Lin Li ◽  
Xian Jun Lu ◽  
Jun Qiu
Keyword(s):  
Magnetic Field ◽  
Magnetic Separation ◽  
Field Intensity ◽  
Inner Mongolia ◽  
Iron Ore ◽  
Magnetic Field Intensity ◽  
Mineral Processing ◽  
Concentrate Yield ◽  
Concentrate Grade

The results show that under the condition of grinding fineness(-200 mesh content) of 52.88% and magnetic field intensity of 0.2T, the index of concentrate yield is 13.25%, concentrate grade is 58.75% and concentrate recovery is 57.32% with preconcentration technology by magnetic separation.

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.

A feasibility study of magnetic separation of magnetic nanoparticle for forward osmosis

2011 ◽  
Vol 64 (2) ◽  
pp. 469-476 ◽  
Author(s):  
Y. C. Kim ◽  
S. Han ◽  
S. Hong
Keyword(s):  
Magnetic Field ◽  
Magnetic Separation ◽  
High Performance ◽  
Magnetic Nanoparticle ◽  
Large Scale ◽  
Magnetic Field Gradient ◽  
Forward Osmosis ◽  
Magnetic Separator ◽  
High Gradient Magnetic Separation ◽  
The Magnetic Field

It was recently reported that a UK company has developed a naturally non-toxic magnetoferritin to act as a draw solute for drawing water in forward osmosis process. The gist of this technology is the utilization of the magnetic nanoparticle and high-gradient magnetic separation for draw solute separation and reuse. However, any demonstration on this technology has not been reported yet. In this study, a feasibility test of magnetic separation using magnetic nanoparticle was therefore performed to investigate the possibility of magnetic separation in water treatment such as desalination. Basically, a magnetic separation system consisted of a column packed with a bed of magnetically susceptible wools placed between the poles of electromagnet and Fe3O4 magnetic nanoparticle was used as a model nanoparticle. The effect of nanoparticle size to applied magnetic field in separation column was experimentally investigated and the magnetic field distribution in a magnet gap and the magnetic field gradient around stainless steel wool wire were analyzed through numerical simulation. The amount of magnetic nanoparticle captured in the separator column increased as the magnetic field strength and particle size increased. As a result, if magnetic separation is intended to be used for draw solute separation and reuse, both novel nanoparticle and large-scale high performance magnetic separator must be developed.

Development, manufacturing and tests of superconducting high-gradient magnetic separator prototype

2020 ◽  
Vol 76 (11) ◽  
pp. 1097-1106
Author(s):  
D. N. Diev ◽  
V. A. Izmalkov ◽  
S. Yu. Kopytova ◽  
V. M. Lepekhin ◽  
M. N. Makarenko ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Power ◽  
Raw Materials ◽  
Mining Industry ◽  
High Energy ◽  
Industrial Applications ◽  
Specific Productivity ◽  
Magnet System ◽  
Magnetic Separator ◽  
High Gradient

High-gradient magnetic separator made a good showing at enrichment of low-magnetic ores. However, existing industrial facilities have large dimensions, low specific productivity and high energy costs. Laboratory prototype of high-gradient magnetic separator equipped with superconductor magnet system was developed, manufactured and tested at NRC “Kurchatov Institute”. The device is designed for enrichment of low-magnetic mineral resources, mostly oxidized ferruginous quartzites. The goal of development was both creation of next-generation of separators operating with high-power magnetic fields as well as further progress in applied superconductivity for industrial applications. This paper gives a brief description of the problem, as well as of the process of development, manufacturing and testing the superconducting magnet system. Overall design of the prototype is described, as well as design of collector matrices designed specifically for high-power magnetic field. Next is description of testing process with mineral raw materials obtained from a real industrial enrichment facility. Data on total iron percentage before and after the separation process at the prototype presented, as well as its basic performance characteristics. The results obtained in the course of the project fulfilment can be used in mining industry and metallurgy for manufacturing superconducting magnetic separators of new generation. Such separators will have many advantages comparing with regular separators (with resistive windings) as following: lower energy consumption and less weight, higher induction of the magnetic field in the working gap, possibility to use matrices with coefficient of filling by ferromagnetic precipitating elements at the level of 6-8% with large gaps for pulp passing, higher specific indices due to increased current density in the winding up to 50-100 A/mm2.

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