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Effect of quaternary ammonium salts on flotation behavior of aluminosilicate minerals

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Abstract

The electrokinetic properties and flotation of diaspore, kaolinite, pyrophyllite and illite with quaternary ammonium salts collectors were studied. The results of flotation tests show that the collecting ability of quaternary ammonium salts for the four minerals is in the order (from strong to weak) of octadecyl dimethyl benzyl ammonium chloride(ODBA), cetyl trimethyl ammonium bromide(CTAB), dodecyl trimethyl ammonium chloride(DTAC). Under the condition of alkalescence, it is possible to separate the diaspore from the silicate minerals such as kaolinite, illite and pyrophyllite using quaternary ammonium salts as collector. Isoelectric points (IEP) of diaspore, kaolinite, pyrophyllite and illite are pH=6.0, 3.4, 2.3 and 3.2, respectively. Quaternary ammonium salts can change ζ-potential of the aluminosilicate minerals obviously. The flotation mechanisms were explained by ζ-potential and Fourier transform infrared spectrum (FT-IR) measurements. The results demonstrate that only electrostatic interaction takes place between aluminosilicate minerals (diaspore, kaolinite, pyrophyllite and illite) and quaternary ammonium salts.

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China

    Zhao Sheng-gui Doctoral candidate  (赵声贵), Zhong Hong  (钟 宏) & Liu Guang-yi  (刘广义)

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  1. Zhao Sheng-gui Doctoral candidate  (赵声贵)
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  2. Zhong Hong  (钟 宏)
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  3. Liu Guang-yi  (刘广义)
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Corresponding author

Correspondence to Zhao Sheng-gui Doctoral candidate  (赵声贵).

Additional information

Foundation item: Project(2005CB623701) supported by the National Key Fundamental Research and Development Program of China

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Zhao, Sg., Zhong, H. & Liu, Gy. Effect of quaternary ammonium salts on flotation behavior of aluminosilicate minerals. J Cent. South Univ. Technol. 14, 500–503 (2007). https://doi.org/10.1007/s11771-007-0097-x

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  • DOI: https://doi.org/10.1007/s11771-007-0097-x

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