The Magnetic Separation Study on Flotation Concentrate Powder of Magnesite Ore

2013 ◽  
Vol 826 ◽  
pp. 140-143
Author(s):  
Qian Qian Wang ◽  
De Zhou Wei ◽  
Xiao An Li ◽  
Shu Juan Dai
Keyword(s):  
Field Strength ◽  
Magnetic Separation ◽  
Background Field ◽  
Operating Conditions ◽  
Magnetic Separator ◽  
High Gradient ◽  
Flotation Concentrate ◽  
Concentrate Yield ◽  
Separation Results

Iron in magnesite concentrate powder would seriously endanger the quality of refractories. Slon-500 vertical ring pulsating and high gradient magnetic separator and CRIMM DCJB70-200 laboratory electromagnetic splint VPHGMS were used to remove iron from magnesite flotation concentrate powder produced in Haicheng region. The magnetic separation results showed that using CRIMM DCJB70-200 laboratory electromagnetic splint VPHGMS is more suitable, and the most suitable operating conditions is the background field strength 641kA / m and bar spacing 2mm, at which time the magnesite concentrate yield was 91.25%, and the Fe2O3 content was 0.34%.

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 Separation of Weakly Magnatic Copper Minerals

1989 ◽  
Vol 2 (4) ◽  
pp. 191-195
Author(s):  
J. N.M. Agricola ◽  
J. L. Top ◽  
A. F. Fort
Keyword(s):  
Magnetic Separation ◽  
Background Field ◽  
Magnetic Fraction ◽  
Magnetic Minerals ◽  
High Gradient Magnetic Separation ◽  
High Gradient ◽  
Copper Mineral ◽  
Copper Concentrate ◽  
Mineral Particles ◽  
Weakly Magnetic

High Gradient Magnetic Separation of small (5-38 µm) weakly magnetic copper mineral particles from a copper concentrate and ore has been performed. In previous work coarser fractions of these minerals, bornite and chalcopyrite, were separated successfully. The recovery of the smaller particles in the magnetic fraction decreases but their grade increases compared to the results obtained on the larger particles. At a magnetic background field of 1.3 T the concentrate was upgraded from 72% bornite and chalcopyrite to 86% with a recovery of 82% and the ore from 16% magnetic minerals to 44% with a recovery of 72%.

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.

scholarly journals High-Gradient Magnetic Separation of Compact Fluorescent Lamp Phosphors: Elucidation of the Removal Dynamics in a Rotary Permanent Magnet Separator

Minerals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1116
Author(s):  
Peter Boelens ◽  
Zhe Lei ◽  
Björn Drobot ◽  
Martin Rudolph ◽  
Zichao Li ◽  
...  
Keyword(s):  
Rare Earth ◽  
Fluorescence Spectroscopy ◽  
Permanent Magnet ◽  
Magnetic Separation ◽  
Laser Induced Fluorescence ◽  
Fluorescent Lamp ◽  
Magnetic Separator ◽  
High Gradient Magnetic Separation ◽  
Time Resolved ◽  
High Gradient

In an ongoing effort towards a more sustainable rare-earth element market, there is a high potential for an efficient recycling of rare-earth elements from end-of-life compact fluorescent lamps by physical separation of the individual phosphors. In this study, we investigate the separation of five fluorescent lamp particles by high-gradient magnetic separation in a rotary permanent magnet separator. We thoroughly characterize the phosphors by ICP-MS, laser diffraction analysis, gas displacement pycnometry, surface area analysis, SQUID-VSM, and Time-Resolved Laser-Induced Fluorescence Spectroscopy. We present a fast and reliable quantification method for mixtures of the investigated phosphors, based on a combination of Time-Resolved Laser-Induced Fluorescence Spectroscopy and parallel factor analysis. With this method, we were able to monitor each phosphors’ removal dynamics in the high-gradient magnetic separator and we estimate that the particles’ removal efficiencies are proportional to (d2·χ)1/3. Finally, we have found that the removed phosphors can readily be recovered easily from the separation cell by backwashing with an intermittent air–water flow. This work should contribute to a better understanding of the phosphors’ separability by high-gradient magnetic separation and can simultaneously be considered to be an important preparation for an upscalable separation process with (bio)functionalized superparamagnetic carriers.

Elaboration and implementation technology of concentration of Magnitogorsk steel-works slime tailings

2021 ◽  
Vol 77 (5) ◽  
pp. 602-609
Author(s):  
K. V. Bulatov ◽  
G. I. Gazaleeva ◽  
N. A. Sopina ◽  
A. A. Mushketov
Keyword(s):  
Magnetic Separation ◽  
Iron Content ◽  
Permanent Magnets ◽  
Magnetic Separator ◽  
High Gradient ◽  
Iron Extraction ◽  
Iron Concentrate ◽  
Extraction Degree ◽  
Spiral Classifier ◽  
Steel Works

The problems of processing iron ore tailings of wet concentration plants and wastes with high content of iron, contaminated by oil products are actual from both points of view of ecology and economy. One of the reasons restraining solving the problem is absence of technologies ensuring to involve such wastes into industrial turnover. In the process` of the research, composition and opening degree of ore and non-metallic minerals of concentration slime tailing of Magnitogorsk steel-works (MMK) were studied and technology of  their  concentration  was  elaborated.  Taking  into  consideration  the  contamination of  initial  slime  tailings of MMK, it was proposed to accomplish their preliminary de-sliming to remove vegetable remains and clay slimes by disintegration in a screw-toothed crusher and washing in a spiral classifier. Results of wet magnetic separation (WMS) of the initial slime tailings of MMK, made at JSC “Uralmekhanobr” presented, the slimes having natural coarseness of –2.0+0.0 mm. It was established that WMS at the magnetic field intensity of 1500 Oe ensures effective removal of magnetite, aggregates magnetite-hematite-goetite into magnetic product. Iron content in the magnetite concentrate was varying from 61.5 to 62.6%. For processing of slime tailings of MMK, magnetic separation was proposed by high-gradient magnetic separator with permanent magnets, created specially for these purposes by “ERGA” company. To increase iron extraction degree, it was proposed to apply gravitation methods of concentration of nonmagnetic product, obtained at high-gradient WMS. It enabled to increase iron content in the final magnetite-hematite concentrate up to 59%. A technological diagram of oiled slimes processing presented. Tests with oiled slimes of bottom deposits of metallurgical production under pilot-industrial conditions of MMK exhibited a possibility to obtain additional iron concentrate with total iron content of 62.47% while oil content in it was less 0.3%.

Application of Super Conducting High Gradient Magnetic Separation Technology on Resource Utilization of Low Grade Iron Ore

2014 ◽  
Vol 968 ◽  
pp. 168-172 ◽  
Author(s):  
Hai Tao Wen ◽  
Su Qin Li ◽  
Chang Quan Zhang ◽  
Wei Wei
Keyword(s):  
Magnetic Separation ◽  
Steel Industry ◽  
Iron Ore ◽  
Environmental Problems ◽  
Low Grade ◽  
Magnetic Separator ◽  
High Gradient Magnetic Separation ◽  
High Gradient ◽  
Separation Technology ◽  
Super Conducting

Nowadays, steel industry develops rapidly. However, lots of iron ore needed by China’s steel industry are imported from abroad. China’s dependence on foreign iron ore exceeds 70%. As a result, not only have large amounts of foreign currencies been spent but also a potential threat has been posed to the economic development of our country. Therefore, it is necessary for China to serve its economic production with lots of low grade iron ore. Since traditional beneficiation methods can cause serious environmental problems, High gradient magnetic separation(HGMS) is discussed in this paper. It can recycle tailings when disposing of low grade iron ore as well as solve the environmental problems caused by tailings and arising during the production process. Besides, high gradient magnetic separator can also raise the processing efficiency of low grade iron core. Therefore, high-gradient magnetic separation can not only increase economic returns but also protect ecological environment. With the maturity of super-conduction high gradient magnetic separation technology, super-conducting high gradient magnetic separation will produce better production effects.

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.

scholarly journals Studies on Beneficiation of Manganese Ore through High Intensity Magnetic Separator

2020 ◽  
Vol 12 (1) ◽  
pp. 21-27
Author(s):  
Waheed Ur Rehman ◽  
Amin Ur Rehman ◽  
Faridullah Khan ◽  
Amir Muhammad ◽  
Mohammad Younas
Keyword(s):  
Magnetic Separation ◽  
Iron Ore ◽  
Manganese Content ◽  
Operating Conditions ◽  
Magnetic Fraction ◽  
Manganese Ore ◽  
Measurable Effect ◽  
Magnetic Separator ◽  
Maximum Value ◽  
Wet Sieving

Upgradation techniques like wet sieving and magnetic separation were used to evaluate the beneficiation potential of manganese ore. During wet sieving, manganese content in raw ore was upgraded from 27% to a maximum value of 38% in the concentrate with a recovery of 30%. Size classification was found to have no measurable effect on manganese grade in magnetic separation. In the unsieved ground ore, manganese content of 45% was achieved with a recovery of 23% and Mn/Fe ratio of 19% at a magnetic intensity of 8500 Gauss. At the same operating conditions, SiO2 was reduced from 56% in the raw ore to 30% in the magnetic fraction. So, wet sieving technique leads to a comparatively lower manganese grade but better recovery. Conversely, a magnetic separation technique produced higher manganese grade but relatively lower recovery. Blending of the upgraded manganese ore with high grade iron ore can be done to achieve the required Mn/Fe ratio.

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