Separation of Fine Mineral Particles by Selective Magnetic Coating

Anastassakis, Georgios N.

doi:10.1006/jcis.2001.7925

Cited by 39 publications

(17 citation statements)

References 21 publications

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“…This indicates that electrostatic attraction itself is not enough for successful magnetite coating. Similar results were obtained in literature related to the removal of serpentine and quartz from magnesite using magnetic carrier methods (9,12). This was explained by the presence of a thin film of water between the hydrophilic surfaces of magnetite and minerals.…”

Section: Magnetic Carrier Testssupporting

confidence: 91%

“…The factors that influence the adsorption of the magnetite include electrical charge of minerals and magnetite, and the presence of adsorbed surfactant at the mineral and magnetite surfaces. The control of these parameters has led to a separation of many minerals such as apatite, barite, seelite, magnesite and iron minerals from calcite, dolomite, serpentine, quartz, and corundum minerals has been performed in laboratory and pilot scales (7)(8)(9)(10)(11)(12).…”

Section: Introductionmentioning

confidence: 99%

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Separation of Chromite from Serpentine in Fine Sizes using Magnetic Carrier

Uçbaş

Bozkurt

Bilir

et al. 2014

Separation Science and Technology

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In this study, possible separation of chromite from serpentine in fine sizes using a magnetic carrier was investigated as a function of pH, dodecylamine (DDA) dosage, and amount of magnetite. First, the zeta potentials of minerals were determined in the absence and presence of DDA, and then magnetic carrier experiments were performed in conditions based upon the zeta potential results. Experiments revealed that chromite could be separated from serpentine with a 96.8% recovery under the experimental conditions of 4 x 10 −4 M DDA, 25 mg magnetite, and at pH 12. In the case of artificial mixtures of chromite and serpentine minerals, chromite concentrate containing 49.7% Cr 2 O 3 was obtained with 82.8% recovery from a feed containing 27.00% Cr 2 O 3. As a result of FTIR studies, physical adsorption of DDA on minerals was confirmed. It was also found that DDA adsorption on chromite was higher than those of serpentine and magnetite. FTIR studies performed with chromite+magnetite and serpentine+magnetite mixtures revealed that DDA adsorption on serpentine declined significantly while DDA adsorption on chromite slightly increased.

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Section: Magnetic Carrier Testssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Separation of Chromite from Serpentine in Fine Sizes using Magnetic Carrier

Uçbaş

Bozkurt

Bilir

et al. 2014

Separation Science and Technology

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show abstract

“…Karapinar (2003) studied magnetic separation of ferrihydrite from wastewater by magnetic seeding (13 lm) and showed that maximum seeding was obtained at a pH 7.9-8.2 (the point of zero charge of ferrihydrite) to form ideal flocculants, the magnetization of which were determined by iron-to-magnetite ratio, the lower the ratio, the better the magnetization of precipitate. Anastassakis (2002) adopted the selective magnetic coating to separate quartz from magnesite fines in an artificial mixture with the extremely fine magnetite of À5 lm, which results showed that the attachment of fine magnetite on quartz was possible in the presence of dodecylamine and kerosene in the pH range 6-11 and only partly coated the surface of magnesite particles. Moreover, there has been very little published literature investigating this technique in the separation of sulfide ores.…”

Section: Introductionmentioning

confidence: 98%

Effects of magnetite on magnetic coating behavior in pentlandite and serpentine system

Yuan

Liu

et al. 2015

Minerals Engineering

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“…Separation of ultrafine mineral particles by selective coating with fine magnetite material to enhance the magnetic susceptibility was explored both experimentally and theoretically [16,17]. The separation process is known as magnetic carrier technology.…”

Section: Introductionmentioning

confidence: 99%