Floatation Effect and Mechanism of Hydroxamic Acid Collectors for Ilmenite and Titanaugite

doi:10.12068/j.issn.1005-3026.2025.20240005

Abstract

Abstract:

The flotation separation behaviors of ilmenite and titanaugite with benzohydroxamic acid （BHA）， salicylhydroxamic acid （SHA）， octylhydroxamic acid （OHA） and butoxylate acid （BFXA） were studied by mineral flotation test. The interaction mechanisms of four hydroxamic acids with different structures on ilmenite and titanaugite surfaces were analyzed by these means of contact angle， Zeta potential， Fourier transform infrared spectra and density functional theory （DFT）. The results indicate that the separation effect for ilmenite with four hydroxamic acids is listed in the order： BFXA>OHA>SHA>BHA. The adsorption of hydroxamic acids on the surface of ilmenite is stronger than that of titanaugite， and the hydrophobicity of ilmenite is significantly improved by adding hydroxamic acid. The two oxygen atoms within oxyoxime groups of hydroxamic acid collectors are their reaction sites. Compared with the other three hydroxamic acids， BFXA has the highest HOMO orbital energy and thus exhibits stronger adsorption performance and collection capability.

Key words: ilmenite, titanaugite, hydroxamic acid collector, flotation, mechanism analysis

CLC Number:

TD 923

Qian-wen LI, Qing-you MENG, Zhi-tao YUAN, Sai-nan QI. Floatation Effect and Mechanism of Hydroxamic Acid Collectors for Ilmenite and Titanaugite[J]. Journal of Northeastern University(Natural Science), 2025, 46(6): 138-146.

Figures/Tables 14

Table1 Chemical multi-element analyses of purified

名称	TiO₂	FeO	TF	CaO	SiO₂	Al₂O₃	MgO
钛铁矿	51.20	30.85	32.43	0.45	0.76	1.71	3.65
钛辉石	4.52	9.21	10.45	16.84	41.10	6.21	11.04

Fig.1 XRD pattern of purified ilmenite and titanaugite

Fig.2 Flotation test process

Fig.3 Optimized molecular structure of the collectors

Fig.4 Effect of pH on the floatability of ilmenite and titanaugite under the action of four types of hydroxamic acids

Fig.5 Effect of the dosage of four hydroxamic acids on the floatability of ilmenite and titanaugite

Fig.6 Effect of different hydroxamic acid on flotation separation effect of mixed ore

Fig.7 Effect of different hydroxamic acids on surface contact angls of ilmenite and titanaugite

Fig.8 Effect of pH on Zeta potential of ilmenite and titanaugite before and after hydroxamic acid action

Fig.9 Infrared spectra of hydroxamic acids with different structures

Fig.10 Infrared spectra of ilmenite before and after hydroxamic acid action

Fig.11 Infrared spectra of titanaugite before and after hydroxamic acid action

Fig 12 Molecular electrostatic potential diagram of hydroxamic acids

Table 2 Molecular orbital energy parameters of four hydroxamic acids

羟肟酸	E_HOMO/eV	E_LUMO/eV	∆E/eV
BHA	-5.598 6	-2.227 2	-3.371 4
BFXA	-5.217 5	-1.177 5	-4.040 0
OHA	-5.554 1	-0.912 1	-4.642 0
SHA	-5.748 8	-2.440 6	-3.308 2

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