Effect of quaternary ammonium salts on flotation behavior of aluminosilicate minerals

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.

Keywords

aluminosilicate mineral / quaternary ammonium salt / flotation

References

[1] LIU Zhong-fan, DU Ya-jun. Overall analysis of Chinese bauxite resource[J]. Light Metals, 2000(12): 8–13. (in Chinese)

[2] LuY.-p., ZhangG.-f., FengQ.-m., et al.. A novel collector RL for flotation of baxite[J]. J Cent South Univ Technol, 2002, 9(1): 21-24

[3] CHEN Jian-hua, ZHAO Qing-jie. Technical progress in last ten years and future development direction of Chinese alumina industry[J]. Light Metals, 2000(10): 3–7. (in Chinese)

[4] CHENG Dai, YAN Din-ou. Production actuality and development of bauxite industry in China[J]. Light Metals, 1997(1): 12–19. (in Chinese)

[5] ChenW.-k., PengG.-cai.The Digestion Technology of Diasporic Bauxite[M], 1997, Beijing, Metallurgical Industry Press

[6] HUANG Guo-zhi, FANG Qi-xue, GUI Ji-rang, Rang-jie, et al. The casting silicate means and studying evolvement of bauxite[J]. Light Metal, 1999(5): 16–20. (in Chinese)

[7] FANG Qi-xue, HUANG Guo-zhi. The character of bauxite and the technology of flotation desilicate in China[J]. Metallic Ore Dressing Abroad, 2000(5): 11–16.

[8] FENG Qi-ming, LIU Guang-yi, LU Yi-ping. The 90’s research and outlook of bauxite on impurity removing by mineral processing[J]. Light Metals, 1998(4): 9–13. (in Chinese)

[9] ZhangG.-fan.Theory and technology of flotation on bauxite desilicate[D], 2001, Changsha, Central South University

[10] ZhangG.-f., LuY.-p., OuL.-m., et al.. A new collector RL for flotation of bauxite[J]. The Chinese Journal of Nonferrous Metals, 2001, 11(4): 712-715

[11] HuY.-h., XuZ.-he.. Role of crystal structure in flotation separation of dispore from koalinite, pyrophyllite and illite[J]. Minerals Engineering, 2003, 16: 219-227

[12] CaoX.-f., HuY.-h., JiangY.-ren.. Flotation mechanism of aluminium silicate minerals with N-dodecyl-1, 3-diaminopropane[J]. The Chinese Journal of Nonferous Metals, 2001, 11(4): 696-700

[13] WANG Qiu-xia, ZHANG Ke-ren, CHEN Guo-ming, et al. Countermeasures for bauxite resources’ exploitation and conservation in China[J]. Conservation and Utilization of Mineral Resources, 2001(3): 49–54. (in Chinese)

[14] XuZ.-h., PlittV.. Recent advances in reverse flotation of diasporic ores—A Chinese experience[J]. Minerals Engineering, 2004, 17: 1007-1015

[15] HuY.-h., JiangH., QiuG.-z., et al.. Solution chemistry of flotation separation of diasporic bauxite[J]. The Chinese Journal of Nonferrous Metals, 2001, 11(1): 125-130

[16] XuS.-chang.Organic Chemistry[M], 1993, Beijing, Higher Education Press