Dithiouracil, a highly efficient depressant for the selective separation of molybdenite from chalcopyrite by flotation: Applications and mechanism

Wang, Xun; Zhao, Bing; Liu, Jie; Zhu, Yimin; Han, Yuexin

doi:10.1016/j.mineng.2021.107287

Cited by 57 publications

(10 citation statements)

References 38 publications

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“…The data were calibrated by the C element (C 1s, 284.8 eV). 26,27 First-Principles Calculation. The CASTEP module of Materials Studio was utilized to carry out the first-principles calculations.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Flotation Separation of Fluorite from Calcite using an Efficient Depressant Nitrilotriacetic Acid in the NaOL System

Xie,

Zhao,

Wang

et al. 2024

Langmuir

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Fluorite and calcite were separated with nitrilotriacetic acid (NTA) as a depressant. The single mineral flotation experiment confirmed that with 40 mg/L NaOL and 80 mg/L NTA, the fluorite recovery and calcite recovery were 24.37 and 94.13%, respectively, at pH 9. Meanwhile, in the fluorite-calcite binary mixed ore flotation experiment, the calcite recovery and fluorite recovery were 75.50 and 26.84%, respectively, and the CaCO 3 and CaF 2 grade in concentrate was 74.32 and 25.61%, respectively. The results confirmed that NTA could be used as a depressant to selectively inhibit fluorite flotation. The mechanism study illustrated that NTA was selectively reacted with fluorite by chemical interaction between O of NTA and Ca of fluorite. The adsorption of NTA on fluorite will impede the interaction between fluorite and NaOL. NTA could adsorb on fluorite in three ways, while the dominant two ways were the complex between double O of NTA and Ca of fluorite in a vertical model and the complex between double O of NTA and Ca of fluorite in a horizontal model.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

“…The K-Alpha ThermoFisher spectrometer and software Avantage were used to obtain and analyze the spectra, respectively. The data were calibrated by the C element (C 1s, 284.8 eV). , …”

Section: Experimental Sectionmentioning

confidence: 99%

Flotation Separation of Fluorite from Calcite using an Efficient Depressant Nitrilotriacetic Acid in the NaOL System

Xie,

Zhao,

Wang

et al. 2024

Langmuir

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“…The adsorption of certain chemicals on mineral interfaces can change the electrical properties of mineral surfaces, as demonstrated by zeta potential measurement (Wang et al, 2022). Such substances can be molecules, ions, hydroxyl complexes, etc.…”

Section: Zeta Potential Distribution Measurementsmentioning

confidence: 99%

Exploration on flotation behavior of galena in seawater and related mechanism

Song¹,

Sun²,

Yin³

et al. 2022

Physicochem. Probl. Miner. Process.

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The utilization of seawater in mineral flotation is the future development trend because of the shortage of fresh water resources. However, at present, the flotation behavior and mechanism of galena in seawater are not clear. Therefore, this paper comprehensively carried out the effect mechanism of seawater on the flotation of galena. Micro-flotation results illustrated that the recovery of galena was higher in deionized water than that in 5×10 -2 mol/L MgCl2 solution, 1×10 -2 mol/L CaCl2 solution and seawater. Contact angle determination and Zeta potential distribution measurements showed that hydrophilic substances adsorbed on the surface of galena under alkaline conditions. X-ray photoelectron spectroscopy (XPS) analysis further indicated that these substances were hydroxides precipitates, carbonate precipitates and hydroxyl complexes formed by divalent magnesium and calcium ions, which prevented the adsorption of collector on mineral surface. As a result, the galena recovery declined in 5×10 -2 mol/L MgCl2 solution, 1×10 -2 mol/L CaCl2 solution and seawater.

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“…For example, the proper hydrocyclone operation, in addition to the reduction in milling energy consumption, affects other downstream processes such as flotation, dewatering, and filtration due to changes in product particle size. Also, several studies such as study done by Kashiwaya et al (2012), Mohammed and Halagy (2013), Jankovic, Valery, and Sonmez (2013), Tang et al (2019), Garmsiri and Unesi (2018), Dehghani et al (2019) and Wang et al (2022), have been conducted on the effect of particle shape on the performance of the mentioned instruments and for various minerals, mainly focusing on aspects of process simulation and modeling. In the present study, first an attempt has been made to investigate the effect of particle size and shape parameters of minerals (copper minerals and molybdenite) on the performance of classification and settling processes, afterward the effect of the efficiency of these devices (affected by the shape and size of copper and molybdenite minerals) on the final separation performance of the molybdenum processing circuit has been investigated.…”

Section: Introductionmentioning

confidence: 99%

The effect of grinding circuit efficiency on the grade and recovery of copper and molybdenum concentrates

Bahrami

Kazemi

Abdollahi

et al. 2022

Energy Sources, Part A: Recovery, Utilization, and Environmenta

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The efficiency of grinding and flotation process in copper-molybdenum processing circuit, largely affected by performance of thickeners and hydrocyclones devices. The goal of this paper is to investigate the effect of the ratelimiting factors on the performance of these devices and consequently on grinding and separation efficiency of the molybdenum processing circuit. So, a full process mineralogical study have been carried out on outputs of thickeners and hydrocyclone of the molybdenite flotation circuit. According to the results, coarse-grained fractions (>50 μm) of the planar molybdenite will not necessarily be recovered by thickener and hydrocyclones. This is especially true for hydrocyclones when the inlet-load rate is high, i.e., the erroneous discharge of planar molybdenite particles from the overflow of hydrocyclone, as well as their floatability in the thickener overflow, can be attributed to the effect of particle shape and size. This issue harms the grade and recovery of flotation due to the increase in the amount of circulating load (regrinding) and consequently the generation of fine particles (<10 μm) in the hydrocyclone-milling circuit. On the other hand, the almost spherical particles of copper minerals, as well as the nonplanar molybdenite fine-grained particles, are easily removed from the hydrocyclone underflow or settled in thickeners. The introduction of copper mineral particles into molybdenum concentrate and vice versa has reduced the quality of the produced concentrate and undesirable flotation performance.

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Dithiouracil, a highly efficient depressant for the selective separation of molybdenite from chalcopyrite by flotation: Applications and mechanism

Cited by 57 publications

References 38 publications

Flotation Separation of Fluorite from Calcite using an Efficient Depressant Nitrilotriacetic Acid in the NaOL System

Flotation Separation of Fluorite from Calcite using an Efficient Depressant Nitrilotriacetic Acid in the NaOL System

Exploration on flotation behavior of galena in seawater and related mechanism

The effect of grinding circuit efficiency on the grade and recovery of copper and molybdenum concentrates

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