Froth flotation of fluorite: A review

Gao, Zhiyong; Wang, Cong; Sun, Wei; Gao, Yuesheng; Kowalczuk, Przemyslaw B.

doi:10.1016/j.cis.2021.102382

Cited by 106 publications

(32 citation statements)

References 140 publications

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“…The knowledge of interfacial dynamic properties of surfactant-adsorbed layers in the presence of inorganic electrolytes is essential for many industries dealing with foaming, emulsification and coating, such as pharmaceuticals [1], mining [2][3][4], environmental remediation [5,6], food [7,8] and biology [9,10], enhanced oil recovery [11] and gas well deliquification [12][13][14][15]. The stability of foam/emulsion is strongly influenced by surface properties of gas-fluid interfaces containing adsorbed surface-active compounds such as surfactants.…”

Section: Introductionmentioning

confidence: 99%

Effect of Divalent and Monovalent Salts on Interfacial Dilational Rheology of Sodium Dodecylbenzene Sulfonate Solutions

Amani

Firouzi

2022

Colloids and Interfaces

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This study presents the equilibrium surface tension (ST), critical micelle concentration (CMC) and the dilational viscoelasticity of sodium dodecylbenzene sulfonate (SDBS)-adsorbed layers in the presence of NaCl, KCl, LiCl, CaCl2 and MgCl2 at 0.001–0.1 M salt concentration. The ST and surface dilational viscoelasticity were determined using bubble-shape analysis technique. To capture the complete profile of dilational viscoelastic properties of SDBS-adsorbed layers, experiments were conducted within a wide range of SDBS concentrations at a fixed oscillating frequency of 0.01 Hz. Salts were found to lower the ST and induce micellar formation at all concentrations. However, the addition of salts increased dilational viscoelastic modulus only at a certain range of SDBS concentration (below 0.01–0.02 mM SDBS). Above this concentration range, salts decreased dilational viscoelasticity due to the domination of the induced molecular exchange dampening the ST gradient. The dilational viscoelasticity of the salts of interest were in the order CaCl2 > MgCl2 > KCl > NaCl > LiCl. The charge density of ions was found as the corresponding factor for the higher impact of divalent ions compared to monovalent ions, while the impact of monovalent ions was assigned to the degree of matching in water affinities, and thereby the tendency for ion-pairing between SDBS head groups and monovalent ions.

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Section: Introductionmentioning

confidence: 99%

Effect of Divalent and Monovalent Salts on Interfacial Dilational Rheology of Sodium Dodecylbenzene Sulfonate Solutions

Amani

Firouzi

2022

Colloids and Interfaces

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“…Moreover, a few of them possess instinctive oxygen mobility that can be strengthened by the replacement of active metals in the lattice, which is helpful to mitigate carbon deposition (Li M et al, 2020;Peng et al, 2020). Large numbers of these materials, such as perovskites (Huang et al, 2018;Ishikawa et al, 2020;Koch et al, 2020), pyrochlores (Li et al, 2016;Talanov and Talanov 2021;Trump et al, 2018;le Saché et al, 2018), fluorites (Chen et al, 2019;Gao et al, 2021), and hexaaluminates (Tian et al, 2016; have been investigated for varied high-temperature reactions.…”

Section: Perovskites-type Mixed Oxides-based Catalystsmentioning

confidence: 99%

Emerging natural and tailored perovskite-type mixed oxides–based catalysts for CO2 conversions

et al. 2022

Front. Chem.

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The rapid economic and societal development have led to unprecedented energy demand and consumption resulting in the harmful emission of pollutants. Hence, the conversion of greenhouse gases into valuable chemicals and fuels has become an urgent challenge for the scientific community. In recent decades, perovskite-type mixed oxide-based catalysts have attracted significant attention as efficient CO2 conversion catalysts due to the characteristics of both reversible oxygen storage capacity and stable structure compared to traditional oxide-supported catalysts. In this review, we hand over a comprehensive overview of the research for CO2 conversion by these emerging perovskite-type mixed oxide-based catalysts. Three main CO2 conversions, namely reverse water gas shift reaction, CO2 methanation, and CO2 reforming of methane have been introduced over perovskite-type mixed oxide-based catalysts and their reaction mechanisms. Different approaches for promoting activity and resisting carbon deposition have also been discussed, involving increased oxygen vacancies, enhanced dispersion of active metal, and fine-tuning strong metal-support interactions. Finally, the current challenges are mooted, and we have proposed future research prospects in this field to inspire more sensational breakthroughs in the material and environment fields.

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“…Flotation is a method of concentration used in mineral processing to separate desired minerals from their ores by altering their surfaces to a hydrophobic or hydrophilic condition that will allow the surfaces to either be repelled or attracted by water [3]. There are large quantities of water required for the fulfilment of flotation process and mining industries are under expanding pressure to manage the use of freshwater effectively and reduce the discharge of mining operations process water.…”

Section: Introductionmentioning

confidence: 99%

“…The difference in the chemistry of the process water from that of the freshwater may result in complications to the operating conditions of the flotation process which in turn negatively or positively affect the performance of the overall flotation process [4]. The different reagents that are used during flotation process that alter the chemistry of the flotation process water are classified as follows: collectors/promoters, activators, frothers, depressants, pH regulators and sulphidizers [3] and the various water factors that are considered in this research study are Total Dissolved Solids (TDS), Total Suspended Solids (TSS), pH, Electrical conductivity (EC), Magnesium (Mg) and Calcium (Ca) contents.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Water Circulation on Bulk Flotation Performance of a Polymetallic Sulphide Ore

Baloyi¹,

Nheta²

2022

International Conference of Recent Trends in Environmental Science and Engineering

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Froth flotation of fluorite: A review

Cited by 106 publications

References 140 publications

Effect of Divalent and Monovalent Salts on Interfacial Dilational Rheology of Sodium Dodecylbenzene Sulfonate Solutions

Effect of Divalent and Monovalent Salts on Interfacial Dilational Rheology of Sodium Dodecylbenzene Sulfonate Solutions

Emerging natural and tailored perovskite-type mixed oxides–based catalysts for CO2 conversions

The Effect of Water Circulation on Bulk Flotation Performance of a Polymetallic Sulphide Ore

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