Comparative studies on flotation of aluminosilicate minerals with Gemini cationic surfactants BDDA and EDDA

被引：21

作者：

Huang, Zhi-qiang ^{[1
]}

Zhong, Hong ^{[1
]}

Wang, Shuai ^{[1
]}

Xia, Liu-yin ^{[1
]}

Liu, Guang-yi ^{[1
]}

机构：

[1] Cent South Univ, Sch Chem & Chem Engn, Key Lab Resources Chem Nonferrous Met, Minist Educ, Changsha 410083, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2013年 / 23卷 / 10期

基金：

中国国家自然科学基金;

关键词：

aluminosilicate minerals; Gemini cationic surfactants; reverse flotation; adsorption mechanism; REVERSE FLOTATION; SEPARATION; KAOLINITE; DIASPORE; PYROPHYLLITE; ILLITE;

D O I：

10.1016/S1003-6326(13)62833-2

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Gemini quaternary ammonium salt surfactants, butane-alpha, omega-bis(dimethyl dodeculammonium bromide) (BDDA) and ethane-alpha, beta-bis(dimethyl dodeculammonium bromide) (EDDA) were adopted to comparatively study the flotation behaviors of kaolinite, pyrophyllite and illite. It was found that three silicate minerals all exhibited good floatability with Gemini cationic surfactants as collectors over a wide pH range, while BDDA showed a stronger collecting power than EDDA. FTIR spectra and zeta potential analysis indicated that the mechanism of adsorption of Gemini collector molecules on three silicate minerals surfaces was almost identical for the electronic attraction and hydrogen bonds effect. The theoretically obtained results of density functional theory (DFT) at B3LYP/6-31G (d) level demonstrated the stronger collecting power of BDDA presented in the floatation test and zeta potential measurement.

引用

页码：3055 / 3062

页数：8

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