Effect of Ca&lt;sup&gt;2+&lt;/sup&gt; and Mg&lt;sup&gt;2+&lt;/sup&gt; on Floatability of Smithsonite and Hemimorphite

Li, Ming Xiao; Sheng, Jian; Zhao, Wen‐Sheng

doi:10.4028/www.scientific.net/amr.813.298

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…Fang et al (2019) found that the recovery of diaspore hardly changed with the increase of Ca 2+ concentration, while Mg 2+ had a significant inhibitory effect. Li et al (2013) demonstrated that Mg 2+ had a greater inhibition on the smithsonite flotation. Different from the above views, Araújo and Lima (2017) discovered that Ca 2+ causes the smithsonite to be strongly inhibited instead of Mg 2+ in the smithsonite flotation.…”

Section: Introductionmentioning

confidence: 94%

Influence of hydrated Ca2+ and Mg2+ complexes on the sulfidization of smithsonite: Density functional based tight binding (DFTB+) study

Wu¹,

Tang²,

Chen³

et al. 2022

Physicochem. Probl. Miner. Process.

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Ca2+ and Mg2+ are the most dominating unavoidable ions in the smithsonite flotation. In this paper, the effect of Ca2+ (Mg2+) on the surface of smithsonite sulfidization in a system where water molecules are present was investigated using density functional based tight binding (DFTB+) simulations for the first time. The results indicated that the adsorption of hydrated Ca2+ complexes is stronger than that of hydrated Mg2+ complexes on the hydrated smithsonite (101) surface. In addition, at low concentrations of sodium sulfide, there is no adsorption of HS- on the surface pre-adsorbed with hydrated Ca2+ complexes, but only on the surface pre-adsorbed with hydrated Mg2+ complexes. At high concentrations of Na2S, S2- weakens the adsorption of hydrated Ca2+ complexes due to competitive adsorption, but the presence of S2- could desorb hydrated Mg2+ complexes from the surface. The results compared the differences in effects of Ca2+ and Mg2+ on smithsonite sulfidization, which could provide an atomic scale basis for researching the surface sulfidization of oxide minerals.

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Section: Introductionmentioning

confidence: 94%

Influence of hydrated Ca2+ and Mg2+ complexes on the sulfidization of smithsonite: Density functional based tight binding (DFTB+) study

Wu¹,

Tang²,

Chen³

et al. 2022

Physicochem. Probl. Miner. Process.

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“…However, the flotation of hemimorphite and smithsonite is relatively difficult due to their poor floatability [9]. Most of the existing studies mainly focus on the sulfidization-amine flotation process, i.e., sulfidization using sodium sulfide as the sulfurizing agent and using amine as the collector [10,11]. However, the separation efficiency of the sulfidization-amine flotation process is relatively low, and there are still some problems such as low selectivity of collector, low concentrate grade and the harmful impact of slime and dissolved ions on the flotation process.…”

Section: Introductionmentioning

confidence: 99%

Density Functional Theory Study on the Surface Properties and Floatability of Hemimorphite and Smithsonite

Han

Zhang

et al. 2018

Minerals

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Hemimorphite and smithsonite are all-important zinc oxide minerals. The beneficiation and separation of them using flotation method is usually considered difficultly. Minerals surface wettability and its regulation are the core issues in the flotation process, which closely correlate with the surface properties of the minerals. Therefore, an in-depth understanding of the surface properties of the two minerals is of great significance for the study of the flotation technology of them. In this study, the surface properties of the hemimorphite (110) surface and the simthsointe (101) surface, and their relationships to the mineral floatability have been investigated by first-principle calculation method based on density functional theory. The calculation results demonstrated that the hemimorphite (110) surface exhibited more obviously surface reconstruction. For the orbital energy level of the surface atoms of two minerals, the O 2p orbital is closer to the Fermi level than the Zn 3d. Chemical bond Mulliken population value indicated that the ionicity of the unsaturated linkage on the smithsonite (101) surface was stronger than that on the hemimorphite (110) surface. The absolute values of the ratios of negative charges to positive charges on the surfaces of hemimorphite and smithsonite were 1.529 and 1.256 respectively. These results implied that the O atoms on hemimorphite (110) surface are more impede collector molecule, such as hydroximic acid, bond with Zn atom, hemimorphite (110) surface is more readily wetted by water. This study provides comprehension at an atomic level to the relationship between surface properties and the floatability of hemimorphite and smithsonite.

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Effect of Ethylenediamine on Smithsonite Flotation

Wen

Yang

2017

Proceedings of the 3rd Pan American Materials Congress

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Effect of Ca<sup>2+</sup> and Mg<sup>2+</sup> on Floatability of Smithsonite and Hemimorphite

Cited by 3 publications

References 4 publications

Influence of hydrated Ca<sup>2+</sup> and Mg<sup>2+</sup> complexes on the sulfidization of smithsonite: Density functional based tight binding (DFTB+) study

Influence of hydrated Ca<sup>2+</sup> and Mg<sup>2+</sup> complexes on the sulfidization of smithsonite: Density functional based tight binding (DFTB+) study

Density Functional Theory Study on the Surface Properties and Floatability of Hemimorphite and Smithsonite

Effect of Ethylenediamine on Smithsonite Flotation

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