Utilization of novel surfactant N-dodecyl-isopropanolamine as collector for efficient separation of quartz from hematite

作者：Liu, Wengang; Liu, Wenbao^*; Wang, Xinyang; Wei, Dezhou; Wang, Benying

来源：Separation and Purification Technology, 2016, 162: 188-194.

DOI：10.1016/j.seppur.2016.02.033

• N-dodecyl-isopropanolamine
• Flotation
• Quartz
• Hematite
• Electrostatic interaction
• Hydrogen bonding adsorption

In this paper, a novel surfactant N-dodecyl-isopropanolamine (NDIA) has been synthesized and utilized as a collector for flotation separation of quartz from hematite. The flotation performances and adsorption mechanisms of NDIA on quartz are investigated by flotation tests, FT-IR spectra studies, zeta potential measurements, and XPS analysis. Flotation results demonstrate that NDIA has excellent floatability and selectivity on quartz at a wide range of pulp pH (about 4.5-8.0). And the artificially mixed minerals of hematite and quartz could be separated effectively. The concentrate with iron recovery of 93.40% and iron grade of 67.16% is obtained at the slurry pH of 6.65 with 33.33 mg/L NDIA and 1333 mg/L starch. FT-IR spectra studies, zeta potential measurements and XPS analysis reveal that NDIA could absorb on quartz surface in the forms of strong electrostatic and hydrogen bonding interaction.

• 出版日期2016-4-13
• 单位东北大学