Selective depression action of taurine in flotation separation of specularite and chlorite

Li, Mingyang; Cheng, Yang; Wu, Zhaoyang; Gao, Xiangpeng; Xiong, Tao; Yu, Xiankun; Long, Hongming

doi:10.1016/j.ijmst.2022.03.006

Cited by 47 publications

(5 citation statements)

References 34 publications

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“…Compared with the results presented in Fig. 14, the increase in zeta potential of brucite follows the order of H 2 SO 4 dissolution > HCl dissolution > H 2 O dissolution > raw brucite ore [21].…”

Section: Analysis Of Zeta Potential Detection Resultsmentioning

confidence: 43%

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Effect of Surface Dissolution on the Floatability of Brucite in Three Anionic Collector Systems

Gong,

Yao,

Yin

et al. 2024

Preprint

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This study investigated the relation between the solubility and floatability of the soluble mineral brucite, focusing on the concentration characteristics of dissolved Mg2+ in brucite under three dissolution methods and the surface characteristics after dissolution. Some common rules of brucite flotation in three anionic collectors were discovered. Results of a flotation test showed that for three anionic collector systems of sodium oleate, sodium dodecyl sulfonate, and oxidized paraffin soap, the flotation recovery rate of brucite, increased with the time of dissolution and decreased with the removal of dissolved Mg2+, but the flotation recovery rate is lower than that of untreated brucite. Inductively coupled plasma spectroscopy indicated that the content of dissolved Mg2+ in brucite slurry increases with increasing brucite content or dissolution time. Zeta potential measurements showed that the ability of dissolved Mg2+ to increase the surface potential of brucite follows the order of H2SO4 action > HCl action > H2O action. Adsorption capacity measurements showed that the presence of dissolved Mg2+ after dissolution is not beneficial for the adsorption of the three collectors on the surface of brucite. The capacity of the adsorption collectors follows the order of brucite after H2O dissolution > brucite after HCl dissolution > brucite after H2SO4 dissolution. Scanning electron microscopy and X-ray photoelectron spectroscopy analyses indicated that the surface dissolution promoted the dissolution of Mg2+ on brucite surface in the solution, reducing the number of Mg sites on brucite surface and deteriorating the collection effect of the collector.

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Section: Analysis Of Zeta Potential Detection Resultsmentioning

confidence: 43%

“…Subsequently, 1 mL of the upper suspension was collected for zeta potential testing. Each sample was measured thrice, and the average value was used for analysis [21].…”

Section: Zeta Potential Detectionmentioning

confidence: 99%

Effect of Surface Dissolution on the Floatability of Brucite in Three Anionic Collector Systems

Gong,

Yao,

Yin

et al. 2024

Preprint

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“…US). In the measurements, 5 mg of mineral sample was mixed, measuring less than 2 μm, into 50 cm 3 of 8 mg/dm 3 HACC solution, with 1×10 -3 mol/dm 3 KCl acting as a background electrolyte solution, and stirred for 3 min (Luo et al, 2022;Li et al, 2022). Afterward, each sample was adjusted to the specified pH value and homogenized by maintaining it for 2 min.…”

Section: Zeta Potential Measurementsmentioning

confidence: 99%

Insights into the depression effect and adsorption mechanism of HACC on chalcopyrite surface in Cu-Mo flotation separation

Li,

Zhang,

Gao

et al. 2023

Physicochem. Probl. Miner. Process.

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In this study, hydroxypropyltrimethyl ammonium chloride chitosan (HACC) was first introduced as a depressant during separating chalcopyrite from molybdenite (Cu-Mo). The selective effects of HACC on the separation of Cu-Mo were conducted by single-mineral flotation tests. The findings revealed that HACC helps separate Cu and Mo efficiently at pH 6 with 8 mg/L of HACC, resulting in 76.22% and 5.38% of Mo and Cu recovery, respectively. The adsorption mechanism of HACC was investigated via Zeta potential, adsorption density, contact angle, FT-IR and XPS analysis. The contact angle and adsorption density measurements offer indisputable proof that HACC can adsorb on the surface of chalcopyrite. Furthermore, FT-IR and XPS measurements confirm that N atoms in quaternary ammonium groups of HACC interact with Cu sites on the surface of chalcopyrite. The findings also suggest that HACC adsorbs on the surface without significantly impacting molybdenite. All these results confirm that HACC can be an effective chalcopyrite depressant.

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“…In Figure 9e-9f, peaks of Fe 2p and Al 2p are the same as Mg 1s, and almost all shifted to the lower binding energy with the displacement above 0.2 eV. For example, Al 2p moved from 74.77 eV (Al2O3(SiO2)x) to 74.56 eV, and Fe 2p moved from 712.1 eV (Fe2O3, Fe2p3/2) to 711.8 eV, indicating that SHMP is chemically adsorbed on the surface of chlorite (Wang et al, 2021;Han et al, 2022), which may be caused by the electron-donating phosphate groups of SHMP donating electrons to metal sites on the surface of chlorite to form metal complexes (Wang et al, 2022;Li et al, 2022). In addition, in Fig.…”

Section: Xpsmentioning

confidence: 99%

“…9i and 9j, the peak in Si 2p also shifted towards lower binding energies, indicating partial electron transfer from the phosphate groups to Si. Although theoretically the tetrahedral closed structure of SiO2 hinders the transfer of electrons, the transfer of electrons from phosphate groups to Si may be caused by the metal ions bound to Si acting as a bridge to transfer electrons (Li et al, 2022).…”

Section: Xpsmentioning

confidence: 99%

The selective depression effect of sodium hexametaphosphate on the separation of chlorite and specularite

Zhao¹,

Yu²,

Gao³

et al. 2023

Physicochem. Probl. Miner. Process.

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Flotation is the most known beneficiation method for the separation of complex and refractory iron ores. As a typical iron-containing silicates, it is difficult to separate chlorite from specularite, because of the similar surface physicochemical properties. In this study, the selective depression effect of sodium hexametaphosphate (SHMP) was conducted via the cationic micro-flotation. The surface adsorption mechanism between SHMP and the two mineral surface was explored through surface adsorption amount tests, Zeta-potential measurements, Fourier transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS) analyses. The micro-flotation results indicated that SHMP could selectively depress around 90% of chlorite, while its effect on the floatability of specularite was negligible (<20% depressing). The surface adsorption amount tests, Zeta-potential measurements analysis demonstrated that SHMP selectively adsorb on chlorite surface while on the surface of specularite is feeble. The further surface adsorption analysis via FT-IR and XPS proved that SHMP selective adsorption occurred on the chlorite surface mainly by chemisorption mainly through the chelation reaction between O in the phosphate groups of SHMP molecular and metal ions on surface of chlorite.

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Selective depression action of taurine in flotation separation of specularite and chlorite

Cited by 47 publications

References 34 publications

Effect of Surface Dissolution on the Floatability of Brucite in Three Anionic Collector Systems

Effect of Surface Dissolution on the Floatability of Brucite in Three Anionic Collector Systems

Insights into the depression effect and adsorption mechanism of HACC on chalcopyrite surface in Cu-Mo flotation separation

The selective depression effect of sodium hexametaphosphate on the separation of chlorite and specularite

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