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Volume 32 Issue 11
Aug.  2021
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Article Contents
GUO Fang, LI Jun, LI Wei, LIU Ping. Improving the grade of a siliceous-calcareous phosphate ore with fine size by reverse flotation method[J]. Chinese Journal of Engineering, 2010, 32(11): 1388-1392. doi: 10.13374/j.issn1001-053x.2010.11.003
Citation: GUO Fang, LI Jun, LI Wei, LIU Ping. Improving the grade of a siliceous-calcareous phosphate ore with fine size by reverse flotation method[J]. Chinese Journal of Engineering, 2010, 32(11): 1388-1392. doi: 10.13374/j.issn1001-053x.2010.11.003

Improving the grade of a siliceous-calcareous phosphate ore with fine size by reverse flotation method

doi: 10.13374/j.issn1001-053x.2010.11.003
  • Received Date: 2010-04-14
  • Reverse flotation was employed to separate quartz from a phosphate ore with fine particle size which contained siliceous and carbonates gangues.The P2O5 grade and recovery were higher than those by direct flotation,especially the P2O5 recovery increased by about 40%.Compared with ether amine salts and quaternary ammonium salts,alkyl amine salts exhibited better flotation results,the P2O5 grade of concentrates and the quartz removal ratio were higher than 30% and 60%,respectively.Acid reagents were more propitious to improve the grade of the siliceous-calcareous phosphate ore than alkaline reagents.Because of the existence of carbonate minerals,a strong acidity condition was more beneficial to separate quartz by reverse flotation.The application of phosphoric acid as a phosphate depressant and pH modifier gave a better usability in comparison with sulfuric acid,and the dosage of phosphoric acid was less than that of sulfuric acid.The optimum collector dosage was 0.5 to 1kg·t-1.The three cationic collectors adsorbed on ore surfaces in physical adsorption,and the adsorption of alkyl amine salts was the strongest,which is likely to explain their preferable flotation performance.

     

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