A study on the separation of magnesite fines by magnetic carrier methods

Anastassakis, Georgios N.

doi:10.1016/s0927-7757(98)00562-7

Cited by 39 publications

(14 citation statements)

References 11 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: 89%

“…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: 89%

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

“…An advantage of nanoparticles is their possibility to stay dispersed as individual grains in a process; but it needs to ensure at the same time complexation and colloidal stability in the medium of extraction. This possibility is a defect for separation, but we have seen that this defect can be turned adding a flocculating agent, and that particles can spontaneously precipitate in the magnetic field gradient if they are poorly stabilized [40]. Phase behavior of dispersions of magnetic nanoparticles is now well known and allows to predict the conditions for agglomeration of particles in aqueous or organic medium [41], but such a prediction needs a good knowledge of the waste mixture.…”

Section: Resultsmentioning

confidence: 99%

Magnetic nano- and microparticles for metal removal and environmental applications: a review

Ngomsik

Bée

Draye

et al. 2005

Comptes Rendus. Chimie

346

130

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“…More recently it has been used as a method of fine-particle selective separation (18)(19)(20)(21)(22)(23)(24)(25)(26)(27). In the past, this process was also used for coarse particles (14).…”

Section: Introductionmentioning

confidence: 99%