Curdlan as a new depressant of hematite for quartz-hematite reverse flotation separation

Han, Wenjie; Zhu, Yimin; Ge, Wen-cheng; Liu, Jie; Li, Yanjun

doi:10.1016/j.mineng.2022.107708

Cited by 18 publications

(2 citation statements)

References 33 publications

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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: 92%

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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Section: Xpsmentioning

confidence: 92%

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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show abstract

“…9, the Si2p orbital and O1s orbital are subjected to peak fitting, and the Si2p high-resolution spectra of (a), (b), and (c) correspond to untreated quartz (Liu et al, 2022), Cu 2+ +EX-treated quartz, and Ni 2+ +EX treated quartz, respectively. The peaks of Si2p orbitals have no clear shift, which indicates that the agent does not interact with the Si atoms on the mineral surface (Han et al, 2022). The O1s orbital high-resolution spectra of (d), (e), and (f) correspond to untreated quartz, Cu 2+ +EX-treated quartz, and Ni 2+ +EX-treated quartz, respectively.…”

Section: Xps Analysismentioning

confidence: 99%

Activation of quartz flotation by Cu2+, Ni2+ in the sodium ethylxanthogenate (EX) system

Yang¹,

Xiong²,

Xie³

et al. 2023

Physicochem. Probl. Miner. Process.

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During the flotation of metal sulfide minerals, due to the interference of unavoidable ions, the quartz also partially floats in some cases. The research on the mechanism of quartz being activated and floating up is still insufficient. In this study, the influence of unavoidable ions Cu2+ and Ni2+ on the floatation of quartz was studied by micro-flotation experiments, adsorption detection, zeta potential measurement, solution composition calculation, infrared spectroscopy (FT-IR) analysis, X-ray photoelectron spectroscopy (XPS) analysis, and atomic force microscopy (AFM) observation. This provides a theoretical reference for further understanding the mechanism of sodium ethylxanthogenate and quartz surface, as well as the development of new quartz depressant. The results of flotation showed that after activation by Cu2+(1×10-4 mol/L) and Ni2+(5×10-5 mol/L), quartz was captured by sodium ethylxanthogenate (EX:1.4×10-4 mol/L) under alkaline conditions, while the best recoveries were 80% and 43%, respectively. The results of adsorption measurement and Zeta potential measurement showed that the precipitation rate of Cu2+ was greater than that of Ni2+ under alkaline conditions. In addition, both Cu2+ and Ni2+ were electrostatically adsorbed on the quartz surface and changed the Zeta potential of quartz. The solution composition calculation further showed that Cu(OH)+, Cu(OH)2(s), and Ni(OH)+, Ni(OH)2(s) were the main components in the solution under alkaline conditions. FT-IR analysis, XPS analysis, and AFM observations revealed that Cu species and Ni species were adsorbed on O atoms on the quartz surface, providing active sites for EX adsorption.

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Flotation separation of fluorite from calcite by a new depressant curdlan and its mechanism

Han

Zhu

et al. 2023

J. Cent. South Univ.

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Curdlan as a new depressant of hematite for quartz-hematite reverse flotation separation

Cited by 18 publications

References 33 publications

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

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

Activation of quartz flotation by Cu2+, Ni2+ in the sodium ethylxanthogenate (EX) system

Flotation separation of fluorite from calcite by a new depressant curdlan and its mechanism

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