New collectors in the flotation of sulphide minerals: a study of the electrokinetic, calorimetric and flotation properties of sphalerite, galena and chalcocite

Maier, G.S; Qiu, Xianyang; Dobiáš, B.

doi:10.1016/s0927-7757(96)03770-3

Cited by 29 publications

(3 citation statements)

References 17 publications

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“…According to the quantum chemical calculation of the molecular orbital, the MBT molecule possesses lower energy and adsorbs on pyrite more readily than the MBT ion. MBT is more likely to adsorb on pyrite in its thione form rather than in its thiol form, further more in the S–N direction than in the S–S direction . These conclusions are considered to be appropriate for results in Figure .…”

Section: Resultsmentioning

confidence: 96%

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Selective Flotation of Chalcopyrite and Marmatite by MBT and Electrochemical Analysis

Qin¹,

Jiao²,

Sun³

et al. 2012

Ind. Eng. Chem. Res.

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Various collectors were compared in the selective flotation of copper−zinc ore by using isopropyl ethylthionocarbamate (Z-200), buthl xanthate, ammonium dibutyl dithiophosphate, and mercapto benzothiazole (MBT). The latter showed effective selectivity in the flotation of chalcopyrite and marmatite and was selected for a detailed study by using cyclic voltammetry and Tafel. The results of microflotation pointed out that the flotation of marmatite was significantly affected by CuSO 4 activation. At weakly alkaline pH, marmatite activated by Cu 2+ is dependent on Cu 2+ concentration shown in electrochemical tests, and the activation products were Cu 2 S and CuS. The increasing addition of Cu 2+ may remove the hydroxides and S 0 , resulting in considerable activation. The corrosion of marmatite is accelerated with the addition of CuSO 4 . Mechanisms are suggested for the selectivity of chalcopyrite/marmatite by MBT: the hydrophilic hydroxides (Zn(OH) 2 and Fe(OH) 3 ) are formed on the marmatite surface, which renders the marmatite surface hydrophilic and hampers the reaction between MBT and marmatite-activated products, while the hydrophobic compounds (MBT) 2 and Cu(MBT) 2 formed on the chalcopyrite surface improve the flotability of chalcopyrite.

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Section: Resultsmentioning

confidence: 96%

“…MBT is more likely to adsorb on pyrite in its thione form rather than in its thiol form, further more in the S−N direction than in the S−S direction. 36 These conclusions are considered to be appropriate for results in Figure 6.…”

Section: Resultsmentioning

confidence: 97%

Selective Flotation of Chalcopyrite and Marmatite by MBT and Electrochemical Analysis

Qin¹,

Jiao²,

Sun³

et al. 2012

Ind. Eng. Chem. Res.

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“…Over the last few years, many studies have been conducted using chelate reagents for sulphide flotation, although xanthates are still commonly used as collectors in flotation processes in the non-ferrous metals beneficiation industry. However, these collectors are active for the entire class of sulphide minerals and not specific to an individual mineral (Maier et al, 1997). Non-traditional collectors (i.e.…”

Section: Introductionmentioning

confidence: 99%

Selective Flotation of Sulphides From a Gold Mining Operation

et al. 2017

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This paper presents a study to obtain sulphide as byproducts of a concentrated cleaner of gold generated from the flotation process of sulphide gold ore of mine Morro do Ouro. Chemical analysis of the concentrated of gold showed a content of approximately 22.05% S, in the form of a bulk sulphides. The liberation of the sulphides was measured using a SEM with second generation automated mineralogy (MLA). For the chalcopyrite recovery step, the fraction of liberated gangue particles is above 90%, for galena up to 92% and sphalerite above 96%, in all sizes. Moreover, the fractions of particles of minerals of interest that are completely liberated is below 0.52% for the chalcopyrite recovery step, 0.65% for galena and 0.28% for sphalerite, in all sizes. The use of collectors Aero 3894, 3418A and 5100 allowed greater selectivity in the flotation circuit presented. The recoveries of chalcopyrite, galena and sphalerite in the Rougher steps were 82%, 73% and 62%, respectively.

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Predicting the efficiencies of 2-mercaptobenzothiazole collectors used as chelating agents in flotation processes: a density-functional study

Yekeler

2006

J Mol Model

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In recent years, several new chelating reagents have been synthesized and tested for their collecting power in sulfide and non-sulfide minerals flotation. Many researchers have indicated that chelating reagents have the advantage of offering better selectivity and specificity as flotation collectors. Therefore, density functional theory (DFT) calculations at the B3LYP/6-31G(d,p) level were performed to investigate the observed activities of 2-mercaptobenzothiazole, 6-methyl-2-mercaptobenzothiazole and 6-methoxy-2-mercaptobenzothiazole as the most popular flotation collectors. The molecular properties and activity relationships were determined by the HOMO localizations, the HOMO energies, Mulliken charges and the electrostatic potentials at the thioamide functional group, which is the key site in the forming efficiency of the collectors studied. It is concluded that these quantities can be used successfully for understanding the collecting abilities of 2-mercaptobenzothiazoles. The results obtained theoretically are consistent with the experimental data reported in the literature.

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New collectors in the flotation of sulphide minerals: a study of the electrokinetic, calorimetric and flotation properties of sphalerite, galena and chalcocite

Cited by 29 publications

References 17 publications

Selective Flotation of Chalcopyrite and Marmatite by MBT and Electrochemical Analysis

Selective Flotation of Chalcopyrite and Marmatite by MBT and Electrochemical Analysis

Selective Flotation of Sulphides From a Gold Mining Operation

Predicting the efficiencies of 2-mercaptobenzothiazole collectors used as chelating agents in flotation processes: a density-functional study

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