Effect and mechanism of Cu(II) on flotation separation of cassiterite from fluorite

Gong, Guangbi; Wang, Pan; Liu, Jie; Han, Yuexin; Zhu, Yimin

doi:10.1016/j.seppur.2019.116401

Cited by 43 publications

(6 citation statements)

References 48 publications

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“…A higher adsorption energy negativity corresponds to a more stable adsorption structure. 53 – 55 As Table 1 shows, the adsorption energy Δ E ads of the bidentate binuclear configuration was −192.39 kJ/mol. The adsorption energy Δ E ads of the bidentate mononuclear configuration was −138.80 kJ/mol, and the adsorption energy Δ E ads of the monodentate mononuclear configuration was −95.50 kJ/mol.…”

Section: Resultsmentioning

confidence: 97%

Investigating the Mechanism of Diethylenetriamine Pentamethylene Phosphonic Acid as a Depressant for Calcite Flotation of Fluorite

Wu,

Zhang,

Zhang

et al. 2024

ACS Omega

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Fluorite and calcite have been attracting research attention for a long time. This paper reports on an investigation of the use of diethylene triamine pentamethylphosphonic acid (DTPMPA) as a chelating inhibitor. DTPMPA was used as a chelating inhibitor to study the flotation, separation, and adsorption behaviors of fluorite and calcite minerals. The microflotation experiment showed that the maximum separation of fluorite and calcite can be achieved with a DTPMPA dosage of 1.5 × 10 −4 mol/L under weakly alkaline conditions (pH = 8). Zeta potential measurement, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy were used to confirm that DTPMPA was adsorbed on the surface of calcite, inhibiting NaOl adsorption. Additionally, density functional theory calculations showed that oxygen in the DTPMPA phosphate group formed the most stable bidentate binuclear adsorption configuration by chelating with calcium on the calcite surface. Through detection analysis and simulation calculations, the results showed that DTPMPA exhibited significantly weaker adsorption on fluorite compared to that on calcite, highlighting its selective inhibition ability on calcite.

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Section: Resultsmentioning

confidence: 97%

Investigating the Mechanism of Diethylenetriamine Pentamethylene Phosphonic Acid as a Depressant for Calcite Flotation of Fluorite

Wu,

Zhang,

Zhang

et al. 2024

ACS Omega

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“…In the flotation separation of cassiterite and fluorite, Cu 2+ ions have been found to have a strong selective depression effect on fluorite. Therefore, Gong et al [214,215], using experimental and DFT methods, studied the effect and mechanism of Cu 2+ on the flotation separation of cassiterite from fluorite with styrene phosphonic acid (SPA) and 2-carboxyethylphenylphosphinic acid (CEPPA) as collectors at pH = 4. It could be inferred from the results that Cu 2+ consumes SPA and CEPPA in the pulp, leaving little free SPA and CEPPA to be adsorbed on the fluorite surface, whereas the adsorption of SPA and CEPPA on cassiterite was unaffected.…”

Section: Cassiteritementioning

confidence: 99%

Application of Quantum Chemistry in the Study of Flotation Reagents

Tang,

Chen,

Chen

et al. 2023

Minerals

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Flotation reagents are significant for modifying the interfacial characteristics of mineral grains to achieve the effective separation of minerals. Since the 1960s, when quantum chemistry was first introduced into the study of flotation reagents, many achievements have been made, although some controversial topics remain. The application of quantum chemistry in the research of flotation reagents for the separation of various minerals in the past decade is herein comprehensively and systematically reviewed. The main directions and gaps of current research are pointed out, the theoretical basis for the design and development of novel flotation reagents is summarized, and more importantly, the potential for the targeting design and development of efficient, selective, and environmentally friendly flotation reagent molecules by means of quantum chemistry is explored.

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“…As one of the most important strategic metal resources, tin is widely used in the military, information and communication, mechanical materials, and other fields because of its excellent physical and chemical properties [1][2][3]. As the main source of tin, tin-bearing minerals include stokesite (CaSnSi 3 O 9 •2H 2 O), cassiterite (SnO 2 ), stannite (Cu 2 FeSnS 4 ), nordenskioldine (CaSnB 2 O 6 ), and so on [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…For example, Cao et al confirmed that in the presence of Zn 2+ and benzohydroxamic acid (BHA), a new type of chelate ring (-Sn-O-Zn-BHA) formed on the cassiterite surface and resulted in the increase of cassiterite flotation recovery [22]. Gong et al revealed that the collector styrene phosphonic acid (SPA) had a stronger affinity with Cu(II) than with fluorite surface, and the presence of Cu(II) enhanced the adsorption of SPA on cassiterite surface [3]. At present, these combined reagents are mainly used to improve the recovery rate of cassiterite.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Flotation Separation of Cassiterite from Calcite Using Metal-Inorganic Complex Depressant

Zhao

Zhu

2021

Minerals

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At present, the research on flotation separation of cassiterite and gangue minerals is mainly focused on the development of new collectors or depressants, while the research on combined depressants is rare. In this study, the flotation separation of cassiterite and the typical gangue mineral, calcite, was investigated using the metal-inorganic complex depressant AlSS, composed of aluminum sulfate (Al2(SO4)3) and water glass (Na2SiO3·4H2O). The flotation results indicated that, with the assistance of Al3+, the inhibition effect of SS (water glass) on calcite is significantly enhanced, while the inhibition effect on cassiterite is almost unchanged. The zeta potential and adsorption measurements proved that the formation of the negatively charged colloidal particles composed of Alm(OH)n3m−n and SiOm(OH)n4−2m−n tended to adsorb on the positively charged calcite surface, inhibiting the adsorption of sodium oleate (NaOL), while the adsorption of the colloidal particles on the negatively charged cassiterite surface is relatively less. The contact angle measurements indicate that the contact angle of cassiterite in the NaOL + AlSS solution is obviously larger than that of calcite, which indicates that cassiterite has better floatability in this system. The X-ray photoelectron spectroscopy (XPS) analysis confirms the Al and Si species are adsorbed on the surface of calcite, but not on the cassiterite. In addition, the adsorption of AlSS on cassiterite and calcite changes the chemical environment on the calcite surface, indicating that the adsorption of AlSS on the mineral surface is more inclined to be through a chemical reaction.

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Effect and mechanism of Cu(II) on flotation separation of cassiterite from fluorite

Cited by 43 publications

References 48 publications

Investigating the Mechanism of Diethylenetriamine Pentamethylene Phosphonic Acid as a Depressant for Calcite Flotation of Fluorite

Investigating the Mechanism of Diethylenetriamine Pentamethylene Phosphonic Acid as a Depressant for Calcite Flotation of Fluorite

Application of Quantum Chemistry in the Study of Flotation Reagents

Enhanced Flotation Separation of Cassiterite from Calcite Using Metal-Inorganic Complex Depressant

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