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Dong W, Guo J, Yu C, Guo B, Jiang K. Silica monolayer isolation of electrodeposited SERS substrate and online probing of molecule adsorption onto mineral microparticles in relation to flotation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 312:124008. [PMID: 38364449 DOI: 10.1016/j.saa.2024.124008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Revised: 01/10/2024] [Accepted: 02/05/2024] [Indexed: 02/18/2024]
Abstract
In the minerals processing industry, the surface chemistry of mineral particles and its real-time detection can significantly enhance process performance, and ultimately leading to automotive and intelligent control. The adsorption of collector molecule onto bulk mineral specimens could be investigated with the help of shell-isolated nanoparticle enhanced Raman spectroscopy (SHINERS). However, this method is unsuitable for the online detection of particles fluid consisted of micro-sized chalcocite that encountered in industrial production processes. In this work, a novel strategy of shell-isolated nanoparticles synthesis by electrodeposition of gold nanoparticles film and isolation of this film with crosslinked silica monolayer was proposed. The adsorption of 2-mercaptobenzothiazole (MBT), a typical flotation collector, onto a copper sulfide mineral, chalcocite was measured in-situ with the help of such a SERS substrate. Enhancement factors of 106-107 was calculated based on an idealized model. Furthermore, we discussed the stability of the silica isolation monolayer under high-power laser irradiation.
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Affiliation(s)
- Weinan Dong
- School of Material Science and Engineering, Fuzhou University, Fuzhou, Fujian 350108, China; Zijin School of Mining and Geology, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Jinsheng Guo
- State Key Laboratory of Process Automation in Mining & Metallurgy; Zijin School of Mining and Geology, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Chun Yu
- Fujian Cross Strait Institute of Flexible Electronics (Future Technologies), Fujian Normal University, Fuzhou 350117, China
| | - Bao Guo
- School of Material Science and Engineering, Fuzhou University, Fuzhou, Fujian 350108, China; State Key Laboratory of Process Automation in Mining & Metallurgy; Zijin School of Mining and Geology, Fuzhou University, Fuzhou, Fujian 350108, China.
| | - Kaixi Jiang
- School of Material Science and Engineering, Fuzhou University, Fuzhou, Fujian 350108, China; Zijin School of Mining and Geology, Fuzhou University, Fuzhou, Fujian 350108, China; State Key Laboratory of Comprehensive Utilization of Low-Grade Refractory Gold Ores, Shanghang, Fujian 364200, China.
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Zhou S, Tong Z, Dong L, Bu X, Ni C, Xie G, Alheshibri M. A comparative study on the influence of single and combined ultrasounds assisted flake graphite flotation. ULTRASONICS SONOCHEMISTRY 2023; 99:106551. [PMID: 37579658 PMCID: PMC10448203 DOI: 10.1016/j.ultsonch.2023.106551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 07/25/2023] [Accepted: 08/03/2023] [Indexed: 08/16/2023]
Abstract
Ultrasound has emerged as a promising technique for improving the mineral flotation performance. However, limited research exists regarding the influence of different ultrasound types on the flotation process. Specifically, the impact of combined ultrasound and the comparison of horn- and bath-type ultrasounds on flotation have not been fully investigated. To address this knowledge gap, a comprehensive study to explore the effects of different ultrasonic pretreatments on the flotation of flake graphite was conducted. A Box-Behnken design is employed to analyze the effects of combined ultrasound on graphite flotation. By characterizing the properties of graphite samples before and after the ultrasonic treatment, the aim is to elucidate the mechanism underlying the impact of ultrasound on graphite flotation. The experimental results indicated that the ultrasonic cavitation intensity exerted a significant influence on the graphite flotation recovery. Both horn- and bath- type ultrasounds contributed to flotation, but horn-type ultrasound demonstrated a more pronounced effect, leading to a 7% increase in flotation recovery, whereas bath-type ultrasound resulted in only a 2% increase. Furthermore, the cavitation intensity of combined ultrasound was found to be higher than that of single-frequency ultrasound in the same duration. However, the performance of graphite flotation was better with short duration combined ultrasound pretreatment, while the opposite trend was observed for a long duration ultrasound pretreatment. These findings may inform the development of more efficient and effective ultrasonic pretreatments for flotation separation processes.
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Affiliation(s)
- Shaoqi Zhou
- Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China
| | - Zheng Tong
- Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China
| | - Lisha Dong
- Western Australian School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Kalgoorlie, WA 6430, Australia
| | - Xiangning Bu
- Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China.
| | - Chao Ni
- Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China
| | - Guangyuan Xie
- Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China
| | - Muidh Alheshibri
- Department of General Studies, Jubail Industrial College, P. O. Box 10099, Jubail Industrial City 31961, Saudi Arabia.
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Recent progress on research of molybdenite flotation: A review. Adv Colloid Interface Sci 2021; 295:102466. [PMID: 34332747 DOI: 10.1016/j.cis.2021.102466] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 06/12/2021] [Accepted: 06/13/2021] [Indexed: 11/23/2022]
Abstract
Molybdenum is an important alloy element for metallurgical industry because of its high temperature stability. As the major mineral reserve for molybdenum, molybdenite (MoS2) is commonly found in porphyry copper deposits. Molybdenite is naturally floatable and can be separated from copper sulfide mineral using froth flotation. Properties of molybdenite such as mineralogy, microstructure, surface wettability, zeta potential, etc. can have a great effect on its floatability. Organic and inorganic depressants and surface pre-treatment methods are applied to improve the recovery of molybdenite. Electrochemical potential measurements using different electrodes are used to monitor process conditions and enable processing parameter adjustments to improve flotation circuit performance and reduce operating costs. Cations like Ca2+ and Mg2+ are reported to have negative effects on the flotation of molybdenite in alkaline solution, and dispersants and oil collectors need to be added to restore the flotation of molybdenite. In addition, effects of gangue minerals, particle size, and oil collectors and surfactants on molybdenite recovery are also discussed in this manuscript.
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Wang J, Zeng H. Recent advances in electrochemical techniques for characterizing surface properties of minerals. Adv Colloid Interface Sci 2021; 288:102346. [PMID: 33383471 DOI: 10.1016/j.cis.2020.102346] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 12/12/2020] [Accepted: 12/13/2020] [Indexed: 10/22/2022]
Abstract
Electrochemical techniques are very useful tools for characterizing the surface properties of natural minerals involved in electrochemical reactions. This work reviews the recent advances in electrochemical characterizations of minerals by employing various electrochemical techniques, i.e., open circuit potential, chronoamperometry, potential sweep voltammetry, electrochemical impedance spectroscopy, and electrochemical scanning probe techniques. The fundamental working principles of these electrochemical techniques and their applications for mineral surface characterizations in various research areas, including mineral flotation, mineral leaching, electrocatalysis, energy storage materials and environmental issues, are highlighted. Valuable information such as the redox condition of substrate surface, the current response of substrate with time under polarization, the identification of redox reaction and its kinetics on substrate surface, the structure of substrate/electrolyte interface, and the local electrochemical response on substrate surface at micro-/nano-scale can be obtained by open circuit potential, chronoamperometry, potential sweep voltammetry, electrochemical impedance spectroscopy, and scanning electrochemical microscopy, respectively. Some remaining challenges and future perspectives are discussed. These recent advances in electrochemical techniques can be readily applied to characterize the surface properties and interfacial interactions of a wide variety of material systems and in different engineering processes.
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Mineralogical Prediction of Flotation Performance for a Sediment-Hosted Copper–Cobalt Sulphide Ore. MINERALS 2020. [DOI: 10.3390/min10050474] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
As part of a study investigating the influence of mineralogical variability in a sediment hosted copper–cobalt deposit in the Democratic Republic of Congo on flotation performance, the flotation of nine sulphide ore samples was investigated through laboratory batch kinetics tests and quantitative mineral analyses. Using a range of ore samples from the same deposit the influence of mineralogy on flotation performance was studied. Characterisation of the samples through QEMSCAN showed that bornite, chalcopyrite, chalcocite and carrollite are the main copper-bearing sulphide minerals while carrollite is the only cobalt-bearing mineral. Mineralogical characteristics were averaged per sample to allow for a quantitative correlation with flotation performance parameters. Equilibrium recoveries, rate constants and final grades of the samples were correlated to the feed mineralogy through Multiple Linear Regression (MLR). Target sulphide minerals content and particle size, magnesiochlorite content, carrollite liberation and association of the copper and cobalt minerals with magnesiochlorite and dolomite were used to predict flotation performance. Leave One Out Cross Validation (LOOCV) revealed that the final copper and cobalt grades are predicted with an R2 of 0.80 and 0.93 and Root Mean Square Error of Cross Validation (RMSECV) of 4.41% and 1.34%. The recovery of cobalt and copper with time can be predicted with an R2 of 0.94 for both and an overall test error of 4.70% and 5.14%. Overall, it was shown that quantitative understanding of changes in mineralogy allows for prediction of changes in flotation performance.
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Moslemi H, Gharabaghi M. A review on electrochemical behavior of pyrite in the froth flotation process. J IND ENG CHEM 2017. [DOI: 10.1016/j.jiec.2016.12.012] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Manafi Z, Abdollahi H, Tuovinen OH. Shake flask and column bioleaching of a pyritic porphyry copper sulphide ore. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.minpro.2012.12.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Qin W, Jiao F, Sun W, He M, Huang H. Selective Flotation of Chalcopyrite and Marmatite by MBT and Electrochemical Analysis. Ind Eng Chem Res 2012. [DOI: 10.1021/ie300410f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wenqing Qin
- School of Minerals Processing and
Bioengineering, Central South University, Changsha 410083, China
| | - Fen Jiao
- School of Minerals Processing and
Bioengineering, Central South University, Changsha 410083, China
| | - Wei Sun
- School of Minerals Processing and
Bioengineering, Central South University, Changsha 410083, China
| | - Mingfei He
- School of Minerals Processing and
Bioengineering, Central South University, Changsha 410083, China
| | - Hongjun Huang
- School of Minerals Processing and
Bioengineering, Central South University, Changsha 410083, China
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Galvanic coupling and its effect on origin potential flotation system of sulfide minerals. ACTA ACUST UNITED AC 2004. [DOI: 10.1007/s11771-004-0056-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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