Depression mechanism of the zinc sulfate and sodium carbonate combined inhibitor on talc

Wang, Xingjie; Liu, Ruizeng; Ma, Liyuan; Qin, Wenqing; Jiao, Fen

doi:10.1016/j.colsurfa.2016.04.057

Cited by 33 publications

(14 citation statements)

References 15 publications

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“…For the point B on the smoother areas of the arsenopyrite surface with colloidal particles, the EDS result shows that Zn was also detected except the main elements of arsenopyrite (Figure 7d), which indicates some very fine ZnCO 3 precipitate may exist. The EDS result for the colloidal particle at point C displays that the main element of the precipitate is Zn, and C was also found, indicating that the main component of this particle is ZnCO 3 and demonstrating the solution chemical speciation calculation results obtained by Jiao et al [22].…”

Section: Sem and Eds Resultssupporting

confidence: 75%

“…The XRD results of pure arsenopyrite/chalcopyrite and corresponding PDF data are shown in Figure 1, and the purities are all shown to be more than 96% by comparing with the corresponding PDF cards in Jade 6.0. The specific surface areas of arsenopyrite samples (-0.074 and +0.038 mm) were measured 0.78 m 2 /g by the method of N 2 adsorption [22].…”

Section: Minerals and Reagentsmentioning

confidence: 99%

“…After treatment with 100 mg/L ZnSO 4 , the electrokinetic potentials of arsenopyrite slightly decreased, followed by a increase from −28 mV (pH 6.5) to −15 mV (pH 7.8), and then fell to the values approximating to that in water at higher pH values. According to the results of solution chemical speciation calculations conducted by Jiao et al using Visual MINTEQ package [22], when ZnSO 4 concentration surpassed 5 × 10 -4 M, solid-state ZnCO 3(S) would be formed in the pH range of 7.5-9.0, which is the possible reason for the potential increase. When the arsenopyrite particles were treated with SIBX after ZnSO 4 treatment, the electrokinetic potentials show a similar value to that directly treated with SIBX at pH < 7.5 and > 9.0.…”

Section: Electrokinetic Potentialmentioning

confidence: 99%

See 2 more Smart Citations

Colloidal ZnCO3 as a Powerful Depressant of Arsenopyrite in Weakly Alkaline Pulp and the Interaction Mechanism

Guan¹,

Ming²,

Xie³

et al. 2020

Minerals

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The effects of ZnSO4 on arsenopyrite depression were studied with sodium carbonate and sodium isobutyl xanthate (SIBX) as the pH regulator and collector, respectively. In both micro and real ore flotation tests, ZnSO4 showed better depression on arsenopyrite (pH 7.5–9.0 adjusted by Na2CO3) compared with sodium humate. The depression mechanism of ZnSO4 on arsenopyrite flotation was studied by electrokinetic potential, adsorbed amount measurements, scanning electron microscope (SEM) observation and energy dispersive spectra (EDS) detection. The electrokinetic potential measurement results show a potential increase forpleas the arsenopyrite treated with ZnSO4 in the pH range 7.5–9.0, which could be attributed to the formation of the precipitated zinc carbonate (ZnCO3(S)). For arsenopyrite treated with both ZnSO4 and SIBX, the electric surface potentials also display an increase, to approximate the values with solely ZnSO4 treated, at pH 7.5–9.0, indicating the inhibition of ZnCO3(S) upon the SIBX adsorption onto arsenopyrite. Adsorption results demonstrated that SIBX adsorption onto arsenopyrite indeed was inhibited at the pH 7.5-9.0 through the sharp decrease in SIBX adsorbed amount with ZnSO4 as the depressant at this pH range. SEM observation and EDS detection results verify the formation of colloidal ZnCO3 on the arsenopyrite, with ZnSO4 as the depressant in combination with Na2CO3.

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Section: Sem and Eds Resultssupporting

confidence: 75%

Section: Minerals and Reagentsmentioning

confidence: 99%

Section: Electrokinetic Potentialmentioning

confidence: 99%

See 1 more Smart Citation

Colloidal ZnCO3 as a Powerful Depressant of Arsenopyrite in Weakly Alkaline Pulp and the Interaction Mechanism

Guan¹,

Ming²,

Xie³

et al. 2020

Minerals

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“…In order to investigate specific ion effects on interactions occurring in the pulp phase of flotation at the solid-water interface, inorganic electrolyte speciation calculations were carried out using the Visual MINTEQ (version 3.1). The Visual MINTEQ is an open-source chemical equilibrium modeling software for the prediction or calculation of ion speciation in water based on thermodynamic equilibrium data (Wang et al, 2016). Only single salt solutions of Ca(NO 3 ) 2 , CaSO 4 , NaNO 3 , and Na 2 SO 4 were subjected to the Visual MINTEQ for ion speciation over a pH range of 2-12.…”

Section: Inorganic Electrolyte Speciationmentioning

confidence: 99%

The Behavior of Gangue During the Flotation of a Sulfidic PGM-Bearing Ore in Response to Various Monovalent and Divalent Ions in Process Water

2020

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Mineral concentrators are becoming increasingly aware of the importance of the quality of the water that they feed into their milling and flotation circuits. It is speculated that different inorganic constituents of process water may yield different flotation results owing to the electrolyte-reagent-mineral interactions occurring in the pulp phase. These interactions are said to be specific to ion type, reagent type, and mineral or ore type. It therefore stands to reason that there is a need to develop an understanding of the specific ion effects on both the pulp phase and the froth phase phenomena, such that the chemistry and the quality of process water can be monitored and controlled in a manner that does not negatively affect the flotation performance. Previous research has shown that inorganic electrolytes may impact the hydrophobicity and the floatability of mineral particles and could in turn affect froth stability, entrainment, and thus mineral grades and recoveries. In this study, the floatability of a Cu-Ni-PGM-bearing Merensky ore is tested on a bench-scale flotation system in various single salt solutions, viz., CaCl 2 , CaSO 4 , Ca(NO 3 ) 2 , MgCl 2 , Mg(NO 3 ) 2 , MgSO 4 , NaCl, NaNO 3 , and Na 2 SO 4 , in order to examine specific ion effects on gangue recovery. Coagulation and zeta potential tests are conducted in order to establish the nature of the impact that specific ions have on the behavior of gangue in flotation. The findings of this work have shown that single salt solutions containing NO − 3 ions resulted in a strong depression of gangue compared to those solutions containing Cl − and SO 4 2− ions. It was also shown that the divalent Ca 2+and Mg 2+ showed a stronger depression of gangue compared to the monovalent Na + . Ca 2+ , in comparison to Na + , resulted in an increase in the coagulation of the ore as well as an increase in the zeta potential of talc. Overall, the findings of this paper suggest that the presence of Ca 2+ and Mg 2+ in process water would most likely create conditions that promote gangue depression. Manono et al. The Behavior of Gangue in Process Water RESEARCH KEY HIGHLIGHTS -Solutions containing NO − 3 and Ca 2+ increased the depression of gangue as shown by lower gangue recoveries. -The concentrate grades were higher in solutions containing Ca 2+ and NO − 3 compared to those which contained Na + , Cl − , and SO 4 2− . -Ca 2+ and NO − 3 resulted in a less negative zeta potential compared to Na + and SO 4 2− . -Coagulation was enhanced in Ca 2+ -and NO − 3containing solutions. -Ca 2+ -containing process waters could be beneficial for floatable gangue depression.

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“…Agent name Organic compounds Carboxymethylcellulose [9,[37][38][39] Chitosan [40,41] Guar gum [9,11,[42][43][44][45] Locust bean gum [40,41] Gum arabic [46] Sesbania gum [47] Tragacanth gum [48] Galactomannan [49] Lignosulfonate [50][51][52][53] Dextrin and modified starch [54,55] Inorganic salts Combination of ZnSO 4 and Na 2 CO 3 [56] Metal salts containing Al 3+ , Cr 3+ ,Mg 2+ , Ca 2+ , etc. [10,51,55] Water glass, sodium hexametaphosphate, etc.…”

Section: Classificationmentioning

confidence: 99%

An Overview of Technologies and Selective Depressing Agents for Separating Chalcopyrite and Talc

Liao¹,

Deng²,

Lai³

et al. 2018

Int J Metall Mater Eng

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Copper-bearing ore containing talc is generally considered as the most refractory type in various chalcopyrite ores, which is predominantly due to the fact that it includes talc and good natural floatability of talc adversely affects the recovery of chalcopyrite. Flotation is the most economical and effective method to separate copper sulfide minerals and talc. For flotation process, there are selective flotation of talc before flotation of copper-bearing minerals, the flotation of copper-bearing minerals with depression of talc, and the bulk flotation of talc and copper-bearing minerals. At present, the researches focus on the depression of talc. The present work reviewed the molecular structure, properties and mechanism of organic and inorganic depressors for talc. The mechanism of action of depressors for talc includes electrostatic interaction, hydrogen bonding and chemical bonding. At the same time, factors such as pH and ionic strength have an important influence on depression effect for talc. The synergism of combined depressors has various novel depression effects on talc surface, which is more efficient than single agent. In the future, separation technology for talc and chalcopyrite develops toward the application of new depressors and the modification of agents. Meanwhile, the development of new depressors for talc needs to consider the properties of associated minerals with talc and copper-bearing minerals. The combined depressors should be developed to maximize the recovery of valuable metals.

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Depression mechanism of the zinc sulfate and sodium carbonate combined inhibitor on talc

Cited by 33 publications

References 15 publications

Colloidal ZnCO3 as a Powerful Depressant of Arsenopyrite in Weakly Alkaline Pulp and the Interaction Mechanism

Colloidal ZnCO3 as a Powerful Depressant of Arsenopyrite in Weakly Alkaline Pulp and the Interaction Mechanism

The Behavior of Gangue During the Flotation of a Sulfidic PGM-Bearing Ore in Response to Various Monovalent and Divalent Ions in Process Water

An Overview of Technologies and Selective Depressing Agents for Separating Chalcopyrite and Talc

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