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%.

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.

High-Gradient Magnetic Separation of pollutant from wastewaters using permanent magnets

2010 ◽  
Vol 72 (2) ◽  
pp. 147-155 ◽  
Author(s):  
Giacomo Mariani ◽  
Massimo Fabbri ◽  
Francesco Negrini ◽  
Pier Luigi Ribani
Keyword(s):  
Magnetic Separation ◽  
Permanent Magnets ◽  
High Gradient Magnetic Separation ◽  
High Gradient

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%.

scholarly journals Comparative study on concentration properties of iron deposits (Mongolia)

2020 ◽  
pp. 44-51
Author(s):  
Ts. Soiolmaa ◽  
◽  
N. Sugir-Erdene ◽  
D. Baasanzhav ◽  
L. Munkhtuul ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Sulfur Content ◽  
Raw Materials ◽  
Metallurgical Industry ◽  
Mineral Contents ◽  
Magnetic Separator ◽  
X Ray ◽  
Iron Concentrate ◽  
Magnetic Concentration ◽  
Iron Deposits

Research aims to compare magnetic flotation results of iron deposits of Mongolia in order to obtain iron concentrate with low sulfur content that meets the standard of raw materials for metallurgical production. Research methodology. Representative samples were taken from Tumurtei deposit in Khuder soum (Selenge province), Tumur Tolgoi deposit (Darkhan-Uul province) and Chandmani Uul deposit (Dornogobi province). Iron grade in the primary ore from Tumurtei deposit was 42.03%, in Tumurtolgoi ore – 46.57% and in Chandmani-Uul ore–43.59%. The ore was crushed into 1 mm size through java crusher and gyratory crusher for the first stage. Dry magnetic concentration was conducted on the ore samples using Boxmag Rapid LR-1.4 Induced Magnetic Separator (the UK). The test work was conducted under the condition when the distance between gyrator of separator and rotation speed are constant and by this time magnetic strength was changed. At the next stage the concentrate of dry magnetic concentration was processed by wet magnetic separation. In order to reduce the sulfur content in the ore from Tumur tolgoi and Tumurtei deposits, flotation experiments were also conducted using UK Denver flotation machine. Ore and concentrator grade were determined using traditional titer method and X-ray fluorescence spectrometer (XRF), the mineral contents was analyzed by X-ray powder diffraction (XRD), elements in product of wet magnetic separator and final concentrate were analyzed using SEM-EDX, the thermal-gravy meter analysis was conducted using instrument TG/DTA7300. Results. Wet magnetic concentration of dry magnetic separation concentrates of all the studied ore allow obtaining concentrates with the high content of iron – from 64% to 66%. Flotation of the concentrate of wet magnetic concentration made it possible to reach iron content in Tumurtei and Tumurtolgoi deposits of 69.02% and 62.86% correspondingly and reduce Sulphur content to 0.2%, 0.48% correspondingly. This study covers the field of flotation technology to extract products with lower sulfur content which meet standard of modern metallurgical industry.

scholarly journals Force index computation for a magnetic separator based on permanent magnet

2021 ◽  
Vol 280 ◽  
pp. 07013
Author(s):  
Fatima Ezzahra Kassid ◽  
Essaâdia Azelmad ◽  
Lahbib Bousshine ◽  
Abdelmajid Berdai
Keyword(s):  
Permanent Magnet ◽  
Magnetic Separation ◽  
Permanent Magnets ◽  
Technological Solution ◽  
Magnetic Separator ◽  
Low Intensity ◽  
Separation Devices

Magnetic separation devices are widely used to separate tramp of iron from a specific feed of materials. Many industries rely on those devises and the variety of technological solution depend mainly on the characteristic of the tramp to be separated. In this paper, main characteristics of low intensity magnetic separation devices based on permanent magnets for dry feed are considered to evaluate force index computation.

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.

Production of hematite concentrate from hematite-magnetite ore

2020 ◽  
pp. 422-430
Author(s):  
A. E. Pelevin
Keyword(s):  
Magnetic Separation ◽  
Iron Content ◽  
Additional Treatment ◽  
High Gradient Magnetic Separation ◽  
High Gradient ◽  
Second Stage ◽  
Magnetite Ore ◽  
Large Particles ◽  
Hematite Concentrate ◽  
Concentration Table

The main useful minerals in composition of hematite-magnetite ore are magnetite and hematite. Magnetite is extracted by wet magnetic separation in weak magnetic field with production of magnetite concentrate and nonmagnetic product. The nonmagnetic product is a feed of the processing circuit for hematite. It is difficult to produce concentrate with iron content of 58-60 mass % if hematite grains are smaller than 0.05 mm. For hematite concentrate production from finely disseminated hematite-magnetite ore, the magnetic-gravitation and magnetic- flotation circuits are designed. This article discusses the magnetic-gravitational separation circuit for hematite grains smaller than 0.05 mm. The first stage of this circuit is fine screening intended to remove large particles. The second stage is high-gradient magnetic separation. The high-gradient separator performance depends on the mineral composition of initial ore and on the rate of mineral dissociation. In finely disseminated hematite-magnetite ore, the associate minerals are mainly represented by quart and amphiboles. Magnetic properties of hematite and amphiboles are similar. For this reason, the high-gradient magnetic separation product contained hematite, amphiboles and quartz-magnetic accretions. The iron content of the magnetic product was 28.9 %. Thus, additional treatment is required, and separation by gravity is applicable in this case. The gravitational separation was carried out on centrifugal concentrator, jigging machine, spiral separator and sluice, and on concentration table. The best results are obtained on the concentration table. The iron content of the final concentrate was 62.3 %.

Separation Test of Ilmenite in Guizhou

2013 ◽  
Vol 470 ◽  
pp. 76-79
Author(s):  
Jin Cheng Ran ◽  
Quan Jun Liu ◽  
Zhi Guo Zhang
Keyword(s):  
Magnetic Separation ◽  
Closed Circuit ◽  
High Gradient Magnetic Separation ◽  
High Gradient ◽  
Iron Concentrate ◽  
Effective Separation ◽  
Separation Test ◽  
Final Selection ◽  
Selection Of

The grade of the TiO2 in the crude ore is 5.84%, the grade of the iron is 28.38%, and the form of the TiO2 mainly is ilmenite. Because of the TiO2 dense symbiosis with the iron, so the difficulty of the study is the effective separation of TiO2 and iron. After testing we decided take the process of grinding the crude ore, then get the iron concentrate through the high gradient magnetic separation. After tailing by the spiral chute, the concentrate through the shaker for the final selection of titanium concentrates. As a result, we attained satisfying selecting targets through closed-circuit test: The grade of TiO2 is 45.38% and the recovery is 70.64% in the TiO2 concentrate. The grade of iron is 57.42% and recovery is 63.80% in iron concentrate.

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%.

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