A fundamental study of chalcopyrite flotation in sea water using sodium silicate

Li, Yubiao; Zhu, Huibiao; Li, Wanqing; Zhu, Yangge

doi:10.1016/j.mineng.2019.105862

Cited by 26 publications

(6 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The macroscopic impurity mineral particles were removed manually after crushing to obtain a high-purity chalcopyrite sample, with 34.3% Cu, 30.4% Fe, and 33.2% S, and an impurity of 2.1%. The X-ray diffraction (XRD) spectra [17] further indicated a high purity of this chalcopyrite sample. This sample was prepared via crushing, grounding and wet sieving to obtain particles in a size range of 75-150 µm for flotation tests.…”

Section: Materials and Reagentsmentioning

confidence: 83%

“…The concentrations of H 2 O 2 were 0.06, 0.1, 0.14 and 1 vol.% (v/v). The XPS survey spectra were collected with a pass energy of 100 eV and a step size of 1.0 eV from 1350 to 0 eV [10] while the high-resolution XPS spectra were collected with a dwell time of 0.1 s and 5 sweeps, with a step size of 0.1 eV and a pass energy of 30 eV [17]. The Avantage 5.9 software was used for data analysis.…”

Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 99%

See 1 more Smart Citation

A Quantitative Relationship between Oxidation Index and Chalcopyrite Flotation Recovery

Yang

Chen

et al. 2022

Minerals

Self Cite

View full text Add to dashboard Cite

The surface oxidation of chalcopyrite is one of the most important factors affecting its flotation performance. In this study, a critical oxidation degree is proposed to define “slight” and “significant” oxidation in terms of surface species and chalcopyrite flotation recovery. Slight oxidation enhanced chalcopyrite hydrophobicity, but significant oxidation reduced its recovery apparently. Microthermokinetic measurements indicated that the apparent activation energy (Ea) of chalcopyrite oxidation was reduced from around 173 kJ·mol−1 to 163 kJ·mol−1 when the reaction changed from slight oxidation to significant oxidation when applying H2O2. The surface oxidation degree was defined as the ratio of hydrophilic species to hydrophobic species. The highest recovery (94.8%) and contact angle (93°) were achieved at a concentration of 0.1 vol.% H2O2, with the lowest oxidation degree of 0.388 being observed. The oxidation degree was correlated to the flotation recovery, with a quantitative relationship (y = −298.81x + 213.05, y and x represent flotation recovery and oxidation degree, respectively, 0.388 ≤ x ≤ 0.618) being established, thereby giving a guideline to better manage chalcopyrite flotation by controlling its surface oxidation and SBX adsorption on chalcopyrite surfaces.

show abstract

Section: Materials and Reagentsmentioning

confidence: 83%

Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 99%

A Quantitative Relationship between Oxidation Index and Chalcopyrite Flotation Recovery

Yang

Chen

et al. 2022

Minerals

Self Cite

View full text Add to dashboard Cite

show abstract

“…The addition of SHMP and SS can produce precipitate reactions with calcium and magnesium ions. On the other hand, SHMP and SS can disperse particles, weaken the attraction between complexes and mineral particles, and reduce their adsorption onto mineral surfaces [44,45]. These agents can reduce the adverse effects of seawater on the adsorption of xanthate on both galena and sphalerite surfaces.…”

Section: Xps Analysismentioning

confidence: 99%

Effects of seawater on the adsorption of xanthate onto galena and sphalerite

Song,

Yao,

Yin

2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Seawater contains divalent calcium and magnesium cations. Under alkaline conditions, calcium and magnesium ions react with hydroxide ions to form insoluble hydroxyl complexes or hydroxide precipitates. The hydrophilic substances that may be adsorbed on the mineral surface during the flotation process hinder the adsorption of the collector, affecting mineral hydrophobicity, and thus reducing the floatability of the mineral. In this study, the effects of seawater on the adsorption of xanthate onto galena and sphalerite were investigated. The results show that under strong alkaline conditions, seawater has significant and slight adverse effects on sphalerite and galena, respectively. Flotation regulators such as ethylenediamine tetraacetic acid, sodium hexametaphosphate, and sodium silicate can eliminate the adverse effect on galena and sphalerite flotation to a certain extent. The mechanisms were revealed through microflotation experiments, contact angle measurements, bubble-particle attachment tests, zeta potential measurements, and XPS analysis.

show abstract

“…While on the other, seawater also has an adverse effect on sulfide minerals flotation. It's reported that the magnesium/calcium precipitation or hydroxyl complexes could adsorb onto the molybdenite (Ai et al, 2021;Castro et al, 2016;Chen et al, 2021;Lucay et al, 2015;Qiu et al, 2016;Ramirez et al, 2020a;Ramirez et al, 2020b;Rebolledo et al, 2017) and chalcopyrite (Li and Li, 2019;Li et al, 2019a;Li et al, 2017;Li et al, 2018;Mu and Peng, 2019a, b;Ramirez et al, 2018) surface at a high pH range to reduce the hydrophobicity of sulfide mineral surfaces. These phenomena are the main reasons for the decline of floatability of sulfide minerals in seawater.…”

Section: Introductionmentioning

confidence: 99%

Exploration on flotation behavior of galena in seawater and related mechanism

Song¹,

Sun²,

Yin³

et al. 2022

Physicochem. Probl. Miner. Process.

View full text Add to dashboard Cite

The utilization of seawater in mineral flotation is the future development trend because of the shortage of fresh water resources. However, at present, the flotation behavior and mechanism of galena in seawater are not clear. Therefore, this paper comprehensively carried out the effect mechanism of seawater on the flotation of galena. Micro-flotation results illustrated that the recovery of galena was higher in deionized water than that in 5×10 -2 mol/L MgCl2 solution, 1×10 -2 mol/L CaCl2 solution and seawater. Contact angle determination and Zeta potential distribution measurements showed that hydrophilic substances adsorbed on the surface of galena under alkaline conditions. X-ray photoelectron spectroscopy (XPS) analysis further indicated that these substances were hydroxides precipitates, carbonate precipitates and hydroxyl complexes formed by divalent magnesium and calcium ions, which prevented the adsorption of collector on mineral surface. As a result, the galena recovery declined in 5×10 -2 mol/L MgCl2 solution, 1×10 -2 mol/L CaCl2 solution and seawater.

show abstract

A fundamental study of chalcopyrite flotation in sea water using sodium silicate

Cited by 26 publications

References 41 publications

A Quantitative Relationship between Oxidation Index and Chalcopyrite Flotation Recovery

A Quantitative Relationship between Oxidation Index and Chalcopyrite Flotation Recovery

Effects of seawater on the adsorption of xanthate onto galena and sphalerite

Exploration on flotation behavior of galena in seawater and related mechanism

Contact Info

Product

Resources

About