A novel method for improving cerussite sulfidization

Feng, Qicheng; Wen, Shuming; Zhao, Wenjuan; Cao, Qinbo; Lu, Chao Tsang

doi:10.1007/s12613-016-1273-5

Cited by 24 publications

(4 citation statements)

References 33 publications

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“…The results obtained by Equations ( 8) and ( 9) are shown in the third and fourth columns of Table 5, respectively. In addition, the second column of Table 5 shows the results obtained by fitting Equation (7). It can be seen that the results of Equation ( 8) have larger regression coefficients compared with those of Equations ( 9) and ( 7).…”

Section: Kinetics Studymentioning

confidence: 99%

“…Due to the ease of separating sulfides from gangue minerals with conventional flotation methods, zinc sulfide ores are currently the main material for the production of zinc [7]. However, with the increasing demand for zinc and shortage of high-grade zinc sulfide resources with exploitable value worldwide, meeting the production demand using only zinc sulfide resources became difficult [8,9].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the Leaching Kinetics of Zinc from Smithsonite in Ammonium Citrate Solution

Chen,

Wu,

Wang

2024

Metals

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In this study, the response surface method is used to develop a model for analyzing and optimizing zinc leaching experiments. An investigation into the leaching kinetics of smithsonite in ammonium citrate solution is also conducted. A model of kinetics is studied in order to represent these effects. The experimental data show that an increase in the solution temperature, concentration, and stirring speed has a positive impact on the leaching rate, while an increase in the particle size has a negative impact on it. The optimal experimental conditions consist of a leaching temperature of 70 °C, ammonium citrate concentration of 5 mol/L, particle size of 38 µm, and rotational speed of 1000 rpm. Under these optimal conditions, the leaching rate of zinc from smithsonite is 83.51%. It is speculated that the kinetic model will change when the temperature is higher than 60 °C. When the temperature is lower than 60 °C, the leaching process is under the control of the shrinking core model of the surface chemical reactions. The calculated activation energy of the leaching reaction is equal to 42 kJ/mol. The model of the leaching process can be described by the following equation: 1−1−x1/3=k0⋅(C)0.6181⋅r0−0.5868⋅SS0.6901exp⁡−42/RT]t. This demonstrates that an ammonium citrate solution can be used in the leaching process of zinc in smithsonite as an effective and clean leaching agent.

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Section: Kinetics Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of the Leaching Kinetics of Zinc from Smithsonite in Ammonium Citrate Solution

Chen,

Wu,

Wang

2024

Metals

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“…Xanthates are common collectors that are used for this purpose, but it has been discovered that oxidized mineral ores showed insufficient response to xanthate collector [190]. This slow response necessitated the sulphidation of the oxidized minerals prior to conditioning with the collector so as to improve the performance of the process [191]. The sulphidations are carried out by using ammonium sulphide, sodium hydrosulphide or sodium sulphide [192].…”

Section: Application Of Dithiocarbamate Compounds As Froth Flotation ...mentioning

confidence: 99%

The Versatility in the Applications of Dithiocarbamates

Ajiboye

Marzouki

Onwudiwe

2022

IJMS

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Dithiocarbamate ligands have the ability to form stable complexes with transition metals, and this chelating ability has been utilized in numerous applications. The complexes have also been used to synthesize other useful compounds. Here, the up-to-date applications of dithiocarbamate ligands and complexes are extensively discussed. Some of these are their use as enzyme inhibitor and treatment of HIV and other diseases. The application as anticancer, antimicrobial, medical imaging and anti-inflammatory agents is examined. Moreover, the application in the industry as vulcanization accelerator, froth flotation collector, antifouling, coatings, lubricant additives and sensors is discussed. The various ways in which they have been employed in synthesis of other compounds are highlighted. Finally, the agricultural uses and remediation of heavy metals via dithiocarbamate compounds are comprehensively discussed.

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“…reported that NH 4 + causes dissolution of the 2 of 12 malachite surface; it acts as a sulfidization promoter and prevents depression of excess S 2− during sulfidization. Feng et al [10] suggested that more lead sulfide species form on the cerussite surface when chloride ions are added prior to sulfidization. The addition of chloride ions prior to sulfidization significantly improves cerussite sulfidization, and this improves the flotation performance.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Depression by Fe3+ During Hemimorphite Flotation

et al. 2020

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Sulfide hemimorphite can be depressed by Fe3+ during flotation. In this study, the depression mechanism was studied by microflotation, inductively-coupled plasma mass spectrometry, local electrochemical impedance spectroscopy (LEIS), and X-ray photoelectron spectroscopy (XPS). Flotation test results suggested that sulfated hemimorphite can be depressed by Fe3+ across the entire pH range. LEIS, adsorption analysis, and XPS indicated that S species were adsorbed on hemimorphite as ZnS. The sulfide film was attenuated and no adsorbed Fe species were found after treatment with Fe3+. The results indicate that Fe3+ reacts with the ZnS film, which decreases the number S species, and this leads to hemimorphite depression.

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A novel method for improving cerussite sulfidization

Cited by 24 publications

References 33 publications

Investigation of the Leaching Kinetics of Zinc from Smithsonite in Ammonium Citrate Solution

Investigation of the Leaching Kinetics of Zinc from Smithsonite in Ammonium Citrate Solution

The Versatility in the Applications of Dithiocarbamates

Mechanism of Depression by Fe3+ During Hemimorphite Flotation

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