Separation of Chromite from Serpentine in Fine Sizes using Magnetic Carrier


Ucbas Y., BOZKURT M. M. V. , BİLİR K., Ipek H.

Separation Science and Technology (Philadelphia), vol.49, no.6, pp.946-956, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 49 Issue: 6
  • Publication Date: 2014
  • Doi Number: 10.1080/01496395.2013.869602
  • Journal Name: Separation Science and Technology (Philadelphia)
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.946-956
  • Keywords: magnetic carrier, dodecylamine, serpentine, chromite, zeta potential, SPECTROSCOPIC METHODS, MINERAL SEPARATION, FLOTATION, MECHANISMS, ABSENCE, QUARTZ, IRON
  • Eskisehir Osmangazi University Affiliated: Yes

Abstract

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% Cr2O3 was obtained with 82.8% recovery from a feed containing 27.00% Cr2O3. 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. Copyright © Taylor & Francis Group, LLC.