Flotation separation of smithsonite from calcite using a new depressant fenugreek gum

Luo, Yi; Zhang, Guofan; Li, Changbin; Mai, Qiongyin; Liu, Hongjiang; Zhou, Hao; Shi, Qing

doi:10.1016/j.colsurfa.2019.123794

Cited by 51 publications

(3 citation statements)

References 26 publications

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“…For this reason, the semi-solubility of the mineral results in adverse effects from calcite on the smithsonite surface. Some approaches for separating smithsonite from calcite pay more attention to calcite depressants, such as starch, water glass, calcium lignosulphonate or carboxymethyl cellulose [21][22][23], but the effectiveness of these depressants is facing more challenges as the average calcite content in worldwide raw zinc oxide ore has begun to increase.…”

Section: Introductionmentioning

confidence: 99%

Flotation Separation of Smithsonite from Calcite Using Cupferron as a Collector

Wang,

Sun,

Cao

et al. 2023

Minerals

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The flotation separation of smithsonite and calcite is difficult due to their similar surface properties. In this study, cupferron was applied as a collector to realize the separation of smithsonite and calcite. Micro-flotation experiment results indicated that smithsonite and calcite express different floatability after treatment with cupferron. The maximum recovery difference was 63%, from a cupferron concentration of 2 × 10−4 mol/L at pH 8. Based on a series of tests, including an adsorption test, Fourier-transform infrared (FTIR), zeta potential and X-ray photoelectron spectroscopy (XPS), the selective collection mechanism of cupferron was studied. It was found that the cupferron was more easily adsorbed on the surface of smithsonite and the reaction was violent. The adsorption capacity of the cupferron on the surface of smithsonite was higher than that of calcite, and the surface potential shift was greater. The cupferron chelated with the exposed Zn sites on the smithsonite surface to form a N-O-Zn ring structure. This special chelate structure caused the smithsonite surface to be more hydrophobic, which confirmed that the cupferron can selectively collect smithsonite instead of calcite.

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Section: Introductionmentioning

confidence: 99%

Flotation Separation of Smithsonite from Calcite Using Cupferron as a Collector

Wang,

Sun,

Cao

et al. 2023

Minerals

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“…To solve this problem, some researchers have attempted to develop selective inhibitors to increase the difference in the floatability of smithsonite and dolomite/calcite. Several polymer anionic surfactants, including fenugreek gum [9], flaxseed gum [10], guar gum [11], and calcium lignosulphonate [12], have been shown to be effective inhibitors for the selective flotation separation of smithsonite and calcite. Moreover, some organic acids, e.g., polyepoxysuccinic acid [13], phenylpropenyl hydroxamic acid [14], phytic acid [15], 2-phosphonobutane-1,2,4-tricarboxylic acid [16], have also been found to have excellent selective inhibitory effects on calcite, while having a negligible effect on smithsonite when using sodium oleate as the flotation collector.…”

Section: Introductionmentioning

confidence: 99%

Study on the Reverse Flotation Separation of Smithsonite from Dolomite Using the Saponified 2-(4,4-Dimethylpentan-2-yl)-5,7,7-trimethyloctanoic Acid as a Collector

Zhang,

Zhu,

Zhao

et al. 2023

Minerals

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Dolomite, a prominent calcium-bearing gangue mineral found in carbonate-type zinc oxide ores, poses a significant challenge for effective flotation separation alongside smithsonite due to their highly similar surface properties. The present study explores the potential of 2-(4,4-dimethylpentan-2-yl)-5,7,7-trimethyloctanoic acid (2-DMPT) as a collector for the reverse flotation of smithsonite from dolomite. Micro-flotation experiments indicated that saponified 2-DMPT exhibited superior collecting ability and selectivity for dolomite over smithsonite under highly alkaline conditions. Specifically, the flotation recovery of dolomite reached 62%, whereas only 6% of smithsonite was recovered in the flotation foam products. Zeta potential and attenuated total reflectance–Fourier transform infrared (ATR-FTIR) analysis revealed that changes in pH values had minimal influence on the collector’s adsorption onto dolomite, while significantly hindering its adsorption on the smithsonite surface. Furthermore, X-ray photoelectron spectroscopy (XPS) analysis showed that 2-DMPT could form hydrophobic complexes with the active Ca2+ sites on the dolomite surface at pH 11.5. However, the interaction between smithsonite and carboxylic groups of 2-DMPT under the same conditions was relatively weaker, facilitating their reverse flotation separation. As a result, 2-DMPT shows promise as a potential collector for the reverse flotation process, effectively removing dolomite from smithsonite and reducing acid consumption in subsequent acid-leaching processes.

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“…However, smithsonite is often associated with calcite (CaCO3) and dolomite (CaMg(CO3)2) , which are easily slimed (Hosseini and Forssberg, 2006;Deng et al, 2018). Moreover, the hard water in many areas also contains Ca 2+ and Mg 2+ (Liu et al, 2012), hence there could inevitably be a large number of Ca 2+ and Mg 2+ in the solution (Nunes et al, 2011;Luo et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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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Flotation separation of smithsonite from calcite using a new depressant fenugreek gum

Cited by 51 publications

References 26 publications

Flotation Separation of Smithsonite from Calcite Using Cupferron as a Collector

Flotation Separation of Smithsonite from Calcite Using Cupferron as a Collector

Study on the Reverse Flotation Separation of Smithsonite from Dolomite Using the Saponified 2-(4,4-Dimethylpentan-2-yl)-5,7,7-trimethyloctanoic Acid as a Collector

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

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