The Performance and Adsorption Mechanism of a Novel Collector, Dodecyl Dimethyl Betaine (BS-12), for the Flotation Separation of Ilmenite and Titanaugite

Abstract

In this paper, a novel collector, dodecyl dimethyl betaine (BS-12), was used in the selective separation of ilmenite from titanaugite. The flotation performance and associated adsorption mechanism were studied by micro-flotation experiments, particle size analysis, Fourier-transform infrared (FT-IR) spectroscopy analysis, and X-ray photoelectron spectroscopy (XPS) analysis. The micro-flotation results indicated that BS-12 exhibited a stronger collecting ability towards ilmenite than titanaugite within an acidic pH range, and that the recovery of ilmenite was about 50% higher than that of titanaugite under the optimum flotation conditions. Particle size analysis demonstrated that BS-12 could selectively agglomerate ilmenite to a certain extent and then contribute to the flotation difference between ilmenite and titanaugite. FT-IR results showed some characteristic bands of BS-12 on treated ilmenite, and on titanaugite with BS-12. The XPS analysis further confirmed that BS-12 chemisorbed onto ilmenite and titanaugite in a similar way, but the limited active sites on titanaugite in comparison with ilmenite accounted for their differences in flotation.

Electrostatic interaction-controlled dispersion of carbon nanotubes in a ternary composite for high-performance supercapacitors

“…1a), indicating that some BS-12 still remained in DMoGC-(BS-12). 24 Besides, the asymmetric bending vibration of alkane C–H was observed at 1465 cm −1 , further confirming the presence of the BS-12 residual in DMoGC-(BS-12) (Fig. 1b).…”

“…The reason might be due to that BS-12 itself is highly viscous and can be easily adsorbed on carbon materials through hydrogen bonding and hydrophobic interactions. 24,25 In contrast, no peaks ascribed to aliphatic –CH 2 , SO 3 2− or aliphatic quaternary amine C–N can be observed from the FTIR spectra of DMoGC-SDS or DMoGC-CTAB (Fig. 1a and b), suggesting that SDS and CTAB were significantly removed during rinsing of the DMoGC samples, as proved by the FTIR spectrum of the rinse solution of the DMoGC samples (Fig.…”

Editorial on Special Issue “Surface Chemistry in Mineral Processing and Extractive Metallurgy”

“…An aqueous suspension of a finely ground ore is conditioned with flotation chemicals by changing the surface properties as per the requirements by making the metal sulfides either more hydrophobic (collector) or more hydrophilic (depressant) [9,10]. In the case of collectors, small air bubbles are produced to aggregate with the hydrophobic particles, making them float on the suspension with froth [11,12]. In the case of depressants, hydrophilic sulfides are depressed to be kept in the liquid solution [13].…”