Flotation Behavior of Complex Sulfide Ores in the Presence of Biodegradable Polymeric Depressants

Hayat, Muhammad Badar; Alagha, Lana Z.; Sannan, Syed Mohammad

doi:10.1155/2017/4835842

Cited by 17 publications

(2 citation statements)

References 22 publications

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“…These target grades and recoveries were optimized previously by the authors in a separate study using statistical methods [8]. The chitosan degree of deacetylation is an important parameter to enhance base metal flotation while depressing pyrite because of the higher content of amine functional group, which was previously reported to have stronger affinity to pyrite compared to base metal sulfides hence enhancing pyrite depression [20,58,59]. This was shown in the XPS study where the amine group chemisorbed on pyrite surfaces had a binding energy shift of +0.11 eV.…”

Section: Optimization Studiesmentioning

confidence: 99%

Experimental and Machine Learning Studies on Chitosan-Polyacrylamide Copolymers for Selective Separation of Metal Sulfides in the Froth Flotation Process

Monyake

Han

Ali

et al. 2023

Colloids and Interfaces

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The froth flotation process is extensively used for the selective separation of valuable base metal sulfides from uneconomic associated minerals. However, in this complex multiphase process, various parameters need to be optimized to ensure separation selectivity and peak performance. In this study, two machine learning (ML) models, artificial neural network (ANN) and random forests (RF), were used to predict the efficiency of in-house synthesized chitosan-polyacrylamide copolymers (C-PAMs) in the depression of iron sulfide minerals (i.e., pyrite) while valuable base metal sulfides (i.e., galena and chalcopyrite) were floated using nine flotation variables as inputs to the models. The prediction performance of the models was rigorously evaluated based on the coefficient of determination (R2) and the root-mean-square error (RMSE). The results showed that the RF model was able to produce high-fidelity predictions of the depression of pyrite once thoroughly trained as compared to ANN. With the RF model, the overall R2 and RMSE values were 0.88 and 4.38 for the training phase, respectively, and R2 of 0.90 and RMSE of 3.78 for the testing phase. As for the ANN, during the training phase, the overall R2 and RMSE were 0.76 and 4.75, respectively, and during the testing phase, the R2 and RMSE were 0.65 and 5.42, respectively. Additionally, fundamental investigations on the surface chemistry of C-PAMs at the mineral–water interface were conducted to give fundamental insights into the behavior of different metal sulfides during the flotation process. C-PAM was found to strongly adsorb on pyrite as compared to galena and chalcopyrite through zeta potential, X-ray photoelectron spectroscopy (XPS), and adsorption density measurements. XPS tests suggested that the adsorption mechanism of C-PAM on pyrite was through chemisorption of the amine and amide groups of the polymer.

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Section: Optimization Studiesmentioning

confidence: 99%

Experimental and Machine Learning Studies on Chitosan-Polyacrylamide Copolymers for Selective Separation of Metal Sulfides in the Froth Flotation Process

Monyake

Han

Ali

et al. 2023

Colloids and Interfaces

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“…Chitosan is a polymer, which was tested for potential selectivity as a green depressant of pyrite in the bulk flotation of galena and chalcopyrite from sphalerite and pyrite-using a xanthate (dithiocarbonate) as a collector and methyl isobutyl carbinol (MIBC) as a frother [21]. Earlier, the role of dextrin in the xanthate flotation of pyrite and sphalerite was examined, by means of flotation tests and micro-electrophoretic measurements [22]; the exclusion of hazardous cyanides in mineral processing has been of particular interest.…”

Section: Mineral Processingmentioning

confidence: 99%

The Flotation Process Can Go Green

Kyzas

Matis

2019

Processes

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In today’s world of environmental strain, wastewater treatment has become a, more or less, conventional application of flotation—as for instance, in the oil, food, or chemical industries, and in potable water treatment. In this paper, different flotation methods (such as ion, adsorbing colloid, and adsorptive flotation, including biosorption) and techniques will be reviewed; and, in order to explain them further, several applications of these from the laboratory (General and Inorganic Chemical Technology) at Aristotle University of Thessaloniki, Greece (AUTh) will be presented and analyzed, with the main focus on sustainability. The application of flotation as a separation process, when applied in pollution control or during water treatment, was often criticized due to the possible toxicity of the applied collectors; however, the use of biosurfactants may alleviate this concern and enhance its further acceptability.

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Advanced Analytics for Mineral Processing

Ali

2022

Advanced Analytics in Mining Engineering

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Flotation Behavior of Complex Sulfide Ores in the Presence of Biodegradable Polymeric Depressants

Cited by 17 publications

References 22 publications

Experimental and Machine Learning Studies on Chitosan-Polyacrylamide Copolymers for Selective Separation of Metal Sulfides in the Froth Flotation Process

Experimental and Machine Learning Studies on Chitosan-Polyacrylamide Copolymers for Selective Separation of Metal Sulfides in the Froth Flotation Process

The Flotation Process Can Go Green

Advanced Analytics for Mineral Processing

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