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), cilt.49, sa.6, ss.946-956, 2014 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 49 Sayı: 6
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1080/01496395.2013.869602
  • Dergi Adı: Separation Science and Technology (Philadelphia)
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.946-956
  • Anahtar Kelimeler: magnetic carrier, dodecylamine, serpentine, chromite, zeta potential, SPECTROSCOPIC METHODS, MINERAL SEPARATION, FLOTATION, MECHANISMS, ABSENCE, QUARTZ, IRON
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

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.