Nuclear Techniques ›› 2018, Vol. 41 ›› Issue (9): 90501-090501.doi: 10.11889/j.0253-3219.2018.hjs.41.090501

• NUCLEAR PHYSICS, INTERDISCIPLINARY RESEARCH • Previous Articles     Next Articles

Study on synergistic adsorption effect of n-nonyl alcohol and styryl phosphoric acid upon the surface of rutile

WANG Xingya1,2, XIAO Wei1, ZHANG Lijuan1, GAO Xingyu1   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2018-04-02 Revised:2018-04-09 Online:2018-09-10 Published:2018-09-12
  • Supported by:
    Supported by National Natural Science Foundation of China (No.11290165)

Abstract: [Background] Styryl phosphoric acid (SPA) is considered to be one of the best selective collectors for rutile flotation. However, high consumption and considerable environmental pressure have limited its wide applications.[Purpose] In this research, n-nonyl alcohol (NNA) was used as the auxiliary collector to reduce SPA dosage.[Results] The experimental results indicated that when SPA was used as the single collector, the rutile flotation presented an optimum index of recovery being 52.26% and the grade being about 45% with a SPA concentration of 0.8×10-4 mol·L-1. But when 0.4×10-4 mol·L-1 SPA and 0.4×10-4 mol·L-1 NNA were used as the mixed collectors, the recovery increased to 82%, and the grade reached 47%. The obtained flotation indexes of the mixed collectors were obviously superior to those of the single collector, and the dosage of SPA in the mixed collectors was only half of that in the single collector.[Methods] The synergistic adsorption mechanism was investigated by Zeta potential measurements and Fourier Transform Infrared Spectrometer (FT-IR) analysis.[Conclusion] NNA increased the foam amount and improved its stability, and quickly reduced the surface tension of the solutions; SPA adsorbed first on the rutile surface, and NNA then bound to SPA by hydrogen bonding.

Key words: Rutile flotation, Synergistic adsorption, Foam property

CLC Number: 

  • TD952