Selective separation of wolframite from calcite by froth flotation using a novel amidoxime surfactant: Adsorption mechanism and DFT calculation

Shuai, Shuyi; Huang, Zhiqiang; Burov, Vladimir E.; Пойлов, В З; Li, Fangxu; Wang, Hongling; Liu, Rukuan; Zhang, Shiyong; Cheng, Chen; Li, Wenyuan; Yu, Xinyang; He, Guichun; Fu, Weng

doi:10.1016/j.mineng.2022.107716

Cited by 37 publications

(10 citation statements)

References 39 publications

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“…And two new peaks appear at 1145 cm −1 and 1029 cm −1 corresponding to C–N and C–O stretching vibration. 45,46 In addition, the peak at 3427 cm −1 is attributed to the –OH stretching vibration (Fig. 1b).…”

Section: Resultsmentioning

confidence: 98%

Highly efficient and rapid Pb(ii) removal from acidic wastewater using superhydrophilic polystyrene phosphate resin

et al. 2022

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Section: Resultsmentioning

confidence: 98%

Highly efficient and rapid Pb(ii) removal from acidic wastewater using superhydrophilic polystyrene phosphate resin

et al. 2022

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“…In this paper, through the relaxation of different cleavage surfaces of magnesite, dolomite and quartz, the surface energy of each cleavage surface was compared to determine the best surface for the agent and minerals. The surface energy was calculated as follows 21 , 22 : where E slab is the energy of the surface slab, E bulk is the single-cell volume energy, N slab is the number of atoms in the layer, N bulk is the number of atoms contained in a unit-cell volume, A is the specific surface area, and the factor 1/2 derives from the two faces of the z -axis in the surface layer.…”

Section: Test Materials and Methodsmentioning

confidence: 99%

Effect of n-octanol on impurity removal by reverse flotation of magnesite ore

Dai

et al. 2022

Sci Rep

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Dodecylamine is one of the most commonly used amine collectors for the reverse flotation of magnesite ore. Through a combination of experimental research and computational simulation, the effect of n-octanol on the removal of impurities by the reverse flotation of magnesite ore was studied. The test results show that when the dosage of dodecylamine was 60 mg/L, the flotation rates of magnesite and dolomite were 59.53% and 58.02%, respectively, and the flotation rate of quartz was 97.60%. In the presence of n-octanol, the flotation rate of magnesite decreased to 56.41%, and the flotation rates of dolomite and quartz increased to 61.30% and 99.59%, respectively. The test results show that the addition of n-octanol can improve the selectivity of minerals under the same amount of collector. The adsorption of dodecylamine (dodecylamine and n-octanol) on the surface of magnesite, dolomite and quartz was simulated using quantum chemical calculations based on density functional theory (DFT) and implemented in the CASTEP module of Materials Studio. The results show that dodecylamine can adsorb to magnesite, dolomite and quartz, and the adsorption effect was strongest on quartz. After adding n-octanol, the population value of the bond between the agent and magnesite decreased from 0.19 to 0.17, indicating that the adsorption effect of the agent on magnesite was weakened. The population value of the bond between the drug and dolomite increased from 0.19 to 0.23, indicating that the adsorption effect of the drug on dolomite was enhanced. H28, H29, and H2 in the drug form bonds with O12, O20, and O20 on the surface of quartz (101), respectively, and the population values were 0.43, 0.25, and 0.09, respectively. The adsorption sites of the drug and the quartz were increased, and the adsorption effect of the quartz was markedly improved. The test and simulation results show that the dosage of the agent can be reduced in the presence of n-octanol. N-octanol is not only beneficial to the removal of silicon by amine reverse flotation but also has a certain beneficial effect on the removal of calcium by reverse flotation.

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“…As an important strategic resource, − tungsten has excellent properties such as high melting point and hardness, stable chemical properties, strong electrical conductivity, and so forth. , All the characteristics make tungsten ubiquitously available in the fields of material production, medical instruments, and national defense science and technology. − Consequently, as the main source of tungsten, research shines the spotlight on the development and utilization of scheelite. − Scheelite, however, is often associated with other calcium-bearing minerals, , among which calcite is believed to be a gangue that negatively affects the scheelite separation severely . In particular, similar active Ca 2+ sites result in the difficulty of separation …”

Section: Introductionmentioning

confidence: 99%

Adsorption of Trisiloxane Surfactant for Selective Flotation of Scheelite from Calcite at Room Temperature

et al. 2022

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The separation and enrichment of scheelite from calcite are hindered by the similar active Ca2+ sites of scheelite and the calcite with calciferous gangue. Herein, a novel trisiloxane surfactant, N-(2-aminoethyl)-3-aminopropyltrisiloxane (AATS), was first explored and synthesized and recommended as the collector for the flotation separation of scheelite from calcite. The micro-flotation and mixed binary mineral flotation tests showed that AATS had excellent collection performance for scheelite and high selectivity for calcite within a wide pH range. At the same time, contact angle and zeta-potential measurements, Fourier transform infrared (FTIR) analysis, and density functional theory (DFT) calculations revealed the relevant adsorption mechanism. The contact angle measurement showed that AATS can increase the contact angle of the scheelite surface from 41.7 to 95.8°, greatly enhancing the hydrophobicity of the mineral surface. The results of FTIR analysis and zeta-potential measurement explained that AATS was electrostatically adsorbed on the mineral surface, and DFT calculation further verified that the −N+H3-positive group in AATS was adsorbed on the negatively charged scheelite surface. Therefore, AATS can realize the expectation of high efficiency and selectivity of minerals and enhance the adhesion between the surface of scheelite minerals and bubbles, providing a fresh approach to industrial production.

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Selective separation of wolframite from calcite by froth flotation using a novel amidoxime surfactant: Adsorption mechanism and DFT calculation

Cited by 37 publications

References 39 publications

Highly efficient and rapid Pb(ii) removal from acidic wastewater using superhydrophilic polystyrene phosphate resin

Highly efficient and rapid Pb(ii) removal from acidic wastewater using superhydrophilic polystyrene phosphate resin

Effect of n-octanol on impurity removal by reverse flotation of magnesite ore

Adsorption of Trisiloxane Surfactant for Selective Flotation of Scheelite from Calcite at Room Temperature

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