The use of collectors mixture in the reverse cationic flotation of magnetite ore: The role of Fe-bearing silicates

Filippov, L.O.; Filippova, I.V.; Severov, V.V.

doi:10.1016/j.mineng.2009.10.007

Cited by 121 publications

(52 citation statements)

References 14 publications

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“…To illustrate the effect of the adsorption of TTPC on the electrokinetic behavior of quartz surface, the zeta potential of quartz and magnetite as a function of pH values were measured in the presence and absence of TTPC or DTAC. As shown in Figure 5, the isoelectric point (IEP) of quartz and magnetite are 2.0 and 5.5, respectively, which is consistent with those previously reported [5,13,46]. As demonstrated in Figure 6a, the zeta potential of quartz shows a pronounced positive shift in the presence of TTPC or DTAC, and the isoelectric point (IEP) of quartz and magnetite are increased to 4.4 and 7.4, respectively, in the presence of DTAC.…”

Section: Zeta Potential Measurementssupporting

confidence: 91%

“…Since anionic collectors such as petroleum sulphonate, fatty acids, and hydroxamates have been first used in the direct flotation of iron oxides in the 1950s [1], the applications of anionic collectors in iron ore flotation have been achieved significant progress. However, due to advantages of reverse cationic flotation over anionic flotation, including the higher process selectivity and rates, as well as satisfactory results when hard water is used, the reverse cationic flotation route has become the most typical flotation route in the iron ore industry [3][4][5][6][7]. However, there are only very few types of cationic collectors (quaternary ammonium salt and their derivatives, with N atoms as the activation center) that can be used to float out silicate gangues in iron ore flotation [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Discovery of a Novel Cationic Surfactant: Tributyltetradecyl-Phosphonium Chloride for Iron Ore Flotation: From Prediction to Experimental Verification

Pan

Gao

et al. 2017

Minerals

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Abstract:In this work, tributyltetradecyl-phosphonium chloride (TTPC), has been first introduced to be a novel and efficient cationic surfactant for cationic reverse flotation separation of quartz from magnetite. The first-principles density functional theory calculations, Zeta potential measurements and adsorption isotherm measurements consistently predict that TTPC may be a promising collector that is better than dodecyl triethyl ammonium chloride (DTAC), based on the facts that TTPC and DTAC both prefer to physically adsorb on the quartz surface owing to electrostatic force, but the active part (P + (C 4 H 9 ) 3 ) of TTPC takes much more positive charges than that (N + (CH 3 ) 3 ) of DTAC. The micro-flotation and Bench-scale flotation results further verify that TTPC presents a stronger collecting power and much better selectivity for iron ore reverse flotation in comparison to the conventional collector DTAC. Furthermore, the corresponding adsorption mechanism of TTPC on the quartz have also been investigated in detail. This work might show a good example to discover a potential candidate collector by analogy with a known excellent collector based on reasonable prediction.

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Section: Zeta Potential Measurementssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Discovery of a Novel Cationic Surfactant: Tributyltetradecyl-Phosphonium Chloride for Iron Ore Flotation: From Prediction to Experimental Verification

Pan

Gao

et al. 2017

Minerals

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“…Among them, the collector is considered to play a major role in that it can adsorb on the target mineral selectively to enhance its hydrophobicity and floatability [2]. As for the flotation methods, reverse cationic/anionic flotation is qualified as one of the most effective beneficiating methods to upgrade the oxide minerals [3,4], especially iron-bearing minerals [5]. However, a traditional reverse anionic froth flotation process, which teats hematite ores with quartz as the predominant gangue mineral and employs fatty acid as the collector, faced a challenge that the flotation criteria are depressed by the entrainment of siderite [6,7].…”

Section: Introductionmentioning

confidence: 99%

Density Functional Theory and Atomic Force Microscopy Study of Oleate Functioned on Siderite Surface

Zhang

Yuan

et al. 2018

Minerals

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Abstract:Efficiently discovering the interaction of the collector oleate and siderite is of great significance for understanding the inherent function of siderite weakening hematite reverse flotation. For this purpose, investigation of the adsorption behavior of oleate on siderite surface was performed by density functional theory (DFT) calculations associating with atomic force microscopy (AFM) imaging. The siderite crystal geometry was computationally optimized via convergence tests. Calculated results of the interaction energy and the Mulliken population verified that the collector oleate adsorbed on siderite surface and the covalent bond was established as a result of electrons transferring from O1 atoms (in oleate molecule) to Fe1 atoms (in siderite lattice). Therefore, valence-electrons' configurations of Fe1 and O1 changed into 3d 6.51 4s 0.37 and 2s 1.83 2p 4.73 from 3d 6.21 4s 0.31 and 2s 1.83 p 4.88 correspondingly. Siderite surfaces with or without oleate functioned were examined with the aid of AFM imaging in PeakForce Tapping mode, and the functioned siderite surface was found to be covered by vesicular membrane matters with the average roughness of 16.4 t nm assuring the oleate adsorption. These results contributed to comprehending the interaction of oleate and siderite.

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“…Flotation is the main measure of separating quartz and two typical methods are used, the one is directly flotation with cationic amine collectors, the other is activated by the polyvalent metal ions and then using anionic collectors for reverse flotation [11][12][13]. In China, due to plentiful raw material sources and lower production costs, most concentrators choose fatty acid collectors to reverse float quartz for the desiliconization of iron ores [14,15].…”

Section: Introductionmentioning

confidence: 99%

Separation Mechanism of Fatty Acids from Waste Cooking Oil and Its Flotation Performance in Iron Ore Desiliconization

et al. 2017

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Using the mixed fatty acids (MFA) produced by waste cooking oil as flotation collectors directly, the flotation effect is usually not satisfactory, especially at lower temperature, which may be due to the presence of large amounts of saturated fatty acids. In this study, waste cooking oil was separated into saturated fatty acids (SFA) and unsaturated fatty acids (UFA). The separation mechanism was studied by molecular simulation based on quantum and molecular mechanics. SFA and UFA were analyzed by iodine value, melting point measurement and Fourier transform infrared (FT-IR) spectroscopy to check the result of the separation. The micro-flotation and bench-scale flotation tests were performed to investigate the flotation differences between SFA and UFA. The results showed that the poor flotation performance of waste cooking oil was due to the large amount of SFA in presence. If the SFA was separated out, the TFe grade and recovery of the flotation concentrates would be increased by 4.09 and 2.70 percentage points, respectively and the SiO 2 grade would be 4.03 percentage points lower at the same time. This study would provide technical supports and theoretical guidance for the waste cooking oil application in the field of mineral processing.

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The use of collectors mixture in the reverse cationic flotation of magnetite ore: The role of Fe-bearing silicates

Cited by 121 publications

References 14 publications

Discovery of a Novel Cationic Surfactant: Tributyltetradecyl-Phosphonium Chloride for Iron Ore Flotation: From Prediction to Experimental Verification

Discovery of a Novel Cationic Surfactant: Tributyltetradecyl-Phosphonium Chloride for Iron Ore Flotation: From Prediction to Experimental Verification

Density Functional Theory and Atomic Force Microscopy Study of Oleate Functioned on Siderite Surface

Separation Mechanism of Fatty Acids from Waste Cooking Oil and Its Flotation Performance in Iron Ore Desiliconization

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