Experimental studies in magnetic separation of ultrafine hematite

1988 ◽  
Vol 24 (6) ◽  
pp. 2413-2415 ◽  
Author(s):  
M.F. Haque ◽  
S. Arajs ◽  
C. Moyer
Keyword(s):  
Magnetic Separation ◽  
Experimental Studies

Experimental Studies on a Mineral Containing Titanium in Baoding Area

2013 ◽  
Vol 826 ◽  
pp. 34-37 ◽  
Author(s):  
Guo Zhen Liu ◽  
Shu Juan Dai ◽  
Li Mei Bai ◽  
Yu Xin Ma ◽  
Yong Zhang
Keyword(s):  
Magnetic Separation ◽  
High Intensity ◽  
Ph Value ◽  
Experimental Studies ◽  
Mineral Processing ◽  
Shaking Table ◽  
Gravity Concentration

The main elements can be recovered for mineral processing in a mineral containing titanium of Baoding area were Ti, Fe and V, and the elements in the main gangue minerals were Si and Al. Gravity concentration, gravity concentration-high intensity magnetic separation and gravity concentration-flotation tests were performed on the ore sample respectively. The results showed that, in the test of shaking table, when the grinding fineness was -0.074mm 93%, the productivity of concentrate can reach 32.24%; when grinding fineness was -0.074mm 93%, after gravity concentration-magnetic separation, 30.25% of concentrate productivity can be attained; when the grinding fineness was -0.074mm 85%, after gravity concentration-flotation, the productivity of concentrate was 3.31%. Maybe it's the condition of the tests wasn't controlled well, especially adjusting pH value in the flotation stage, it's hard to control, so the results were not very good.

The Comprehensive Utilization of Recovering Gold from Iron Tailings

2012 ◽  
Vol 622-623 ◽  
pp. 494-499
Author(s):  
Xiao Wang ◽  
Xiong Tong ◽  
Zheng Bin Deng ◽  
Yong Cheng Zhou ◽  
Xian Xie
Keyword(s):  
Magnetic Separation ◽  
Experimental Studies ◽  
Leaching Rate ◽  
Gold Dissolution ◽  
Comprehensive Utilization ◽  
Iron Concentrate ◽  
Comprehensive Recovery

In this study, the main aim was to recovery the gold from iron tailings, and comprehensive recovery of iron by using combined separating technology. Experimental studies were carried out on the iron tailings in Dahongshan samples, which contain 0.5g/t of gold and 16.8% of iron. Through the experiment, the first is pre-discarding tailings by centrifuge, and then the gold is recovered by cyanidation leaching with using of H2O2 to increase the rate of gold dissolution. The gold’s leaching rate can reach 97.60%. The qualified iron concentrate can be got from leaching slag and gravity tailings by magnetic separation. Iron tailings get a comprehensive utilization, which has a better effect.

Recovering of Iron from Feebly-Magnetic Iron Tailings Containing High Silicate

2013 ◽  
Vol 385-386 ◽  
pp. 30-33
Author(s):  
Xian Xie ◽  
Xiao Wang ◽  
Xiong Tong
Keyword(s):  
Magnetic Separation ◽  
High Frequency ◽  
Experimental Studies ◽  
Comprehensive Utilization ◽  
Iron Concentrate ◽  
High Silicate

In this study, the main aims were to recovery iron from iron tailings containing high silicate and reduce the tailing grade by using combined separating technology. Experimental studies were carried out on the iron tailings in Dahongshan samples, which contain 27.78% of iron. Through the experiment, the first is pre-classification by high-frequency vibrating, and then the iron is recovered by strong magnetic separation of one rough, one scavenger and a gravity concentrating with Slon and chute. The iron concentrate which the grade of Fe is 53.08% and the recovery of 68.45% is obtained and the grade of tailings reduce from 27.78% to 13.80%. Iron tailings get a comprehensive utilization, which has a better effect.

Magnetic separation of iron and heavy metals from water

2003 ◽  
Vol 47 (1) ◽  
pp. 29-32 ◽  
Author(s):  
J.D. Navratil ◽  
M.T. Shing Tsair
Keyword(s):  
Heavy Metals ◽  
Magnetic Separation ◽  
Experimental Studies ◽  
Sorption Process ◽  
Separation Device ◽  
Nanoscale Particles ◽  
Iron Ferrite ◽  
Magnetic Filtration ◽  
Sorption Mechanisms ◽  
Water Passage

A magnetic separation device is being developed for removal of iron and heavy metals from water. The device consists of a column of supported magnetite surrounded by a movable permanent magnet. The mineral magnetite, or synthetically prepared iron ferrite (FeO.Fe2O3), is typically supported on various materials to permit adequate water passage through the column. In the presence of an external magnetic field, enhanced capacity was observed in using supported magnetite for removal of actinides and heavy metals from wastewater. The enhanced capacity is primarily due to magnetic filtration of colloidal and nanoscale particles along with some complex and ion exchange sorption mechanisms. This paper will review some previous work on the use of magnetite for wastewater treatment and discuss the development and potential of the magnetic nanoscale filtration/sorption process for water treatment. Recent research results are also presented on preliminary experimental studies using the process with water samples containing iron.

scholarly journals DRY MAGNETIC SEPARATION OF MAGNETITE ORES

2020 ◽  
Vol 17 (34) ◽  
pp. 700-710
Author(s):  
Kanat Sh CHOKIN ◽  
Abdraman I YEDILBAYEV ◽  
Baimurat A YEDILBAYEV ◽  
Vladimir D YUGAY
Keyword(s):  
Magnetic Separation ◽  
Experimental Studies ◽  
Magnetic Separator ◽  
New Model ◽  
Fine Grained ◽  
Magnetite Ore ◽  
Industrial Grade ◽  
Dry Magnetic Separation ◽  
Industrial Scheme ◽  
Dry Beneficiation

The relevance of the paper is that dry magnetic separation (DMS) is the main beneficiation method of magnetite ores. The lack of efficient industrial-grade machines and apparatus for separating fine-grained magnetite ores means that DMS is used mainly as a pre-concentration operation for fairly large classes. The aim of the research is to study the possibility of using a new magnetic separator model in the process of dry beneficiation of magnetite ore from the Bapy deposit. This paper presents theoretical and experimental studies of a new model of a magnetic separator. The mathematical modeling of the magnetic separation process of the device was carried out to evaluate the parameters in accordance with which a laboratory separator was subsequently manufactured. For the experimental study of the properties of this magnetic system, a laboratory magnetic separator was built. The possibility of using a new magnetic separator in the process of dry beneficiation of magnetite ore from the Bapy deposit was investigated. The industrial scheme being implemented consists in ore crushing and two stage dressing on dry drum magnetic separators. The study of beneficiation indicators of the magnetic separator was carried out using iron ore of the Bapy deposit, which is mono-mineral magnetite. For the study, mixtures of the minus 0.1 mm class were selected with the iron content α = 50% and α = 40%. As a result of the research, beneficiation indicators were obtained on a laboratory scale. Therefore, the improvement of the beneficiation scheme is reduced to the isolation of a small product and its subsequent beneficiation using a new model of magnetic separator. Thus, the presented magnetic separator is suitable for dry processing of crushed magnetite ore.

Study on the Influence of Magnetism and Specific Gravity of Synthetic Diamond Abrasive Particles on their Mechanical Performances

2011 ◽  
Vol 52-54 ◽  
pp. 745-749
Author(s):  
Zhong Ping Luo ◽  
Ya Lin Yao ◽  
Bing He ◽  
Zhi Hua Xia
Keyword(s):  
Specific Gravity ◽  
Magnetic Separation ◽  
Static Pressure ◽  
Synthetic Diamond ◽  
Experimental Studies ◽  
Abrasive Particles ◽  
Toughness Index ◽  
Mechanical Performances ◽  
Diamond Abrasive ◽  
Impurities And Defects

In this paper, static-pressure strength, toughness index (TI) and thermal-toughness index (TTI) of each sample have been analyzed on the basis of the experimental studies on the magnetic separation and heavy liquid separation of diamond abrasives. The results show that the magnetism of synthetic diamond abrasives has an obvious influence on their mechanical performances. With the increase of magnetism, synthetic diamond abrasive particles becomes darker and darker in appearance color, and have more bubbles, impurities and defects inside the particles, furthermore, their surface fineness observed under the microscope will be found worse. While, the static-pressure strength, the TI under the normal temperature and TTI all become lower and lower. But the influence on the static-pressure strength and the TI is smaller, however the influence on TTI is the greater. The specific gravity of synthetic diamond abrasives has little influence on their mechanical performances.

3-D reconstruction and analysis of mammalian mitotic spindle structure

1992 ◽  
Vol 50 (1) ◽  
pp. 578-579
Author(s):  
Kent McDonald ◽  
David Mastronarde ◽  
Rubai Ding ◽  
Eileen O'Toole ◽  
J. Richard McIntosh
Keyword(s):  
Cross Sections ◽  
Mitotic Spindle ◽  
Experimental Studies ◽  
Video Camera ◽  
Three Dimensions ◽  
Mitotic Spindles ◽  
Black And White ◽  
Reconstruction Methods ◽  
Spindle Structure ◽  
Tissue Culture Line

Mammalian spindles are generally large and may contain over a thousand microtubules (MTs). For this reason they are difficult to reconstruct in three dimensions and many researchers have chosen to study the smaller and simpler spindles of lower eukaryotes. Nevertheless, the mammalian spindle is used for many experimental studies and it would be useful to know its detailed structure.We have been using serial cross sections and computer reconstruction methods to analyze MT distributions in mitotic spindles of PtK cells, a mammalian tissue culture line. Images from EM negatives are digtized on a light box by a Dage MTI video camera containing a black and white Saticon tube. The signal is digitized by a Parallax 1280 graphics device in a MicroVax III computer. Microtubules are digitized at a magnification such that each is 10-12 pixels in diameter.

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