Sodium Lauroyl Glutamate as a Collector in Cassiterite Flotation

Author:

Peng Zaihua,Sun Lei,Cao Yang,Fan Xiaohui,Sun Wei,Wang Qingqing

Abstract

In this paper, sodium lauroyl glutamate (SLG), a stable and inexpensive green surfactant, was used as a flotation collector for the first time in cassiterite flotation. The micro-flotation tests revealed that SLG could effectively collect cassiterite and have superior selectivity against quartz over a wide pH range, compared with benzohydroxamic acid (BHA). The maximum recovery of cassiterite in the presence of SLG was 93.2%, while the quartz recovery was consistently lower than 8%. The adsorption experiments and zeta potential measurements suggested SLG was chemisorbed onto the cassiterite surface. The Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analyses indicated that the polar groups of SLG anions (the carboxyl and amide groups) chelate with the Sn ions on the cassiterite surface to form five-membered rings. This structure made SLG attach firmly to the cassiterite surface, effectively recovering cassiterite. Lastly, a good flotation index was achieved in the bench-scale flotation tests using SLG as the collector, which confirmed its potential economic value in practical application.

Funder

The National Natural Science Foundation of China

The Natural Science Foundation of Hunan Province, China

The National Key R&D Program, China

Collaborative Innovation Center for Clean and Efficient Utilization of Strategic Metal Mineral Resources

Publisher

MDPI AG

Subject

Geology,Geotechnical Engineering and Engineering Geology

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