A Study of Temperature Effect on the Xanthate’s Performance during Chalcopyrite Flotation

An, Dongbo; Zhang, Jinhong

doi:10.3390/min10050426

Cited by 12 publications

(11 citation statements)

References 23 publications

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“…As seen in Figure2a-c, surface of all three minerals become hydrophilic by being subjected to the acoustic waves at any time frame.Figure2adisplays resultant contact angles of fresh and ultrasonic-treated chalcopyrite as a function of sonication time in the absence of any surfactant. As seen, the pure chalcopyrite indicates an average value of 55 • , which is the same value presented by An and Zhang[56]. Similar to pyrite (Figure2b) and quartz (Figure2c) but with different magnitudes, chalcopyrite becomes hydrophilic by subjecting to the acoustic waves (60 W).…”

supporting

confidence: 82%

Effect of Power Ultrasound on Wettability and Collector-Less Floatability of Chalcopyrite, Pyrite and Quartz

et al. 2021

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Numerous studies have addressed the role of ultrasonication on floatability of minerals macroscopically. However, the impact of acoustic waves on the mineral hydrophobicity and its physicochemical aspects were entirely overlooked in the literature. This paper mainly investigates the impact of ultrasonic power and its time on the wettability and floatability of chalcopyrite, pyrite and quartz. For this purpose, contact angle and collectorless microflotation tests were implemented on the ultrasonic-pretreated and non-treated chalcopyrite, pyrite and quartz minerals. The ultrasonic process was carried out by a probe-type ultrasound (Sonopuls, 20 kHz and 60 W) at various ultrasonication time (0.5–30 min) and power (0–180 W) while the dissolved oxygen (DO), liquid temperature, conductivity (CD) and pH were continuously monitored. Comparative assessment of wettabilities in the presence of a constant low-powered (60 W) acoustic pre-treatment uncovered that surface of all three minerals became relatively hydrophilic. Meanwhile, increasing sonication intensity enhanced their hydrophilicities to some extent except for quartz at the highest power-level. This was mainly related to generation of hydroxyl radicals, iron-deficient chalcopyrite and elemental sulfur (for chalcopyrite), formation of OH and H radicals together with H2O2 (for pyrite) and creation of SiOH (silanol) groups and hydrogen bond with water dipoles (for quartz). Finally, it was also found that increasing sonication time led to enhancement of liquid temperature and conductivity but diminished pH and degree of dissolved oxygen, which indirectly influenced the mineral wettabilities and floatabilities. Although quartz and pyrite ultrasound-treated micro-flotation recoveries were lower than that of conventional ones, an optimum power-level of 60–90 W was identified for maximizing chalcopyrite recovery.

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confidence: 82%

Effect of Power Ultrasound on Wettability and Collector-Less Floatability of Chalcopyrite, Pyrite and Quartz

et al. 2021

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“…Higher temperatures seemed to have a positive influence on collector adsorption on chalcopyrite minerals with the opposite true for pentlandite. It is, possible that temperature effects must be considered on a case by case basis (e.g., different ores) [25]. Temperature also affects the generation of hydroxyl species in solution.…”

Section: Discussionmentioning

confidence: 99%

“…Based on Equations (3)-(6) it could suggest that the increased oxygen content at lower temperatures results in a higher degree of xanthate adsorption (reaction of xanthate on the sulphide surface) due to the increase in DO in solution consumed by the cathodic reaction although the linear model and previous authors [24,25] also did not observe such phenomena. It is important to note that other parameters besides oxygen content have an effect on collector adsorption on the chalcopyrite surface.…”

Section: Eh Monitoring During Sibx Adsorption Onto Chalcopyritementioning

confidence: 95%

Assessing the Combined Effect of Water Temperature and Complex Water Matrices on Xanthate Adsorption Using Multiple Linear Regression

et al. 2020

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The combined effect of dissolved ions and water temperature on the adsorption of a xanthate collector on chalcopyrite and pentlandite was investigated using multiple linear regression. Cationic species improved the adsorption of the collector on sulphide minerals through xanthate adsorption activation. Thiosulphate ions generally had a negative effect on collector adsorption, and the interaction of thiosulphate ions and cations effectively reduced collector adsorption on the sulphide minerals. With regards to temperature variation caused by seasonal variation, this study suggests that temperature can influence the adsorption of collectors in the flotation process and this should be approached on a case by case basis as it seems to differ with the type of mineral under investigation. These fundamental results prompt a discussion on how complex water matrices can affect interactions of reagents and sulphide minerals at the solid–liquid interface and the possible effect on flotation performance.

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“…Effects of high temperature on xanthate adsorption is considered to be mineral and ore specific. High temperature (50 -60 °C) enhances xanthate adsorption on chalcopyrite, particularly at high dosages, but it negatively impacts on the adsorption on pentlandite [18,33,34]. This is attributed to weaker floatability of pentlandite and faster surface oxidation than chalcopyrite.…”

Section: Flotation Testsmentioning

confidence: 99%

The Impact of Pulp Temperature on the Water Chemistry and Flotation Performance

Bicak,

Cakir,

Ozcelik

et al. 2023

Preprint

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: Flotation performance in plants can significantly be affected by seasonal variations in different parts of the world. This is generally attributed to the changes in water temperature and pulp temperature in flotation plants, type and concentration of dissolved ions in process water. Extreme temperature conditions may be the major factor affecting flotation performance and mask the influence of water chemistry. Therefore, the interactive effects of the temperature and water chemistry should be taken into consideration, particularly for mine sites experiencing extreme temperature conditions. In this paper, effects of temperature, sulphate (SO42-), thiosulphate (S2O32-) and calcium (Ca2+) ions on the flotation performance of a Cu-Pb-Zn complex sulfide ore were investigated using a statistical experimental design and modelling approach. Batch scale kinetic flotation tests were conducted using the sequential flotation flowsheet of a bulk Cu-Pb flotation stage followed by a zinc rougher flotation stage. The results of the zinc flotation section were used for the statistical evaluation since the zinc concentrate was the product with an economic value for the mine. The results were evaluated using ANOVA analysis and regression analysis to determine the significant parameters and derive individual regression models for each flotation response with Design Expert software version 6.0.8. Individual regression models were developed using the significant main effects and their interactions for each flotation response. Then, the models were used to determine the concentration of the dissolved ions and pulp temperature required to achieve the maximum zinc recovery, maximum zinc grade or the optimum zinc grade and recovery. The details of statistical experimental design, discussions on the effects of the experimental factors and their interactions on the flotation performance and development of regression models are discussed in this paper.

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A Study of Temperature Effect on the Xanthate’s Performance during Chalcopyrite Flotation

Cited by 12 publications

References 23 publications

Effect of Power Ultrasound on Wettability and Collector-Less Floatability of Chalcopyrite, Pyrite and Quartz

Effect of Power Ultrasound on Wettability and Collector-Less Floatability of Chalcopyrite, Pyrite and Quartz

Assessing the Combined Effect of Water Temperature and Complex Water Matrices on Xanthate Adsorption Using Multiple Linear Regression

The Impact of Pulp Temperature on the Water Chemistry and Flotation Performance

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