Two-stage reverse flotation process for removal of carbonates and silicates from phosphate ore using anionic and cationic collectors

  • Amirech Abdelkrim 
  • Bouhenguel Mustapha Email author
  • Sabri Kouachi
Original Paper


Phosphate rock contains various gangue minerals including silicates and carbonates which need to be reduced in content in order to meet the requirements of the phosphate industry. Froth flotation has become an integral part of phosphate concentration process. In this study, double reverse flotation was applied to recover apatite from phosphate ore. H3PO4 and CaO were used as phosphate depressants, in acidic and alkaline conditions. Fatty acids and amines were added as carbonate and silicate collectors respectively. An experimental protocol devised to optimize the grade and recovery of phosphate using anionic–cationic method was found effective. Consequently, a required high quality of phosphate concentrate containing 30.1% P2O5 was obtained, with a recovery of 94%. X-ray diffraction and optical microscopy studies were performed to define the main minerals.


Phosphate ore Characterization Fatty acids Amines Flotation 


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Copyright information

© Saudi Society for Geosciences 2018

Authors and Affiliations

  • Amirech Abdelkrim 
    • 1
  • Bouhenguel Mustapha 
    • 2
    Email author
  • Sabri Kouachi
    • 2
  1. 1.Constantine 3 UniversityLa Nouvelle Ville Ali MendjeliAlgeria
  2. 2.Applied Chemistry and materials technology LaboratoryLarbi Ben Mhidi UniversityOum El BouaghiAlgeria

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