Effects of common ions on the flotation of fluorapatite and dolomite with oleate collector

Huang, Wenxuan; Liu, Wenbiao; Zhong, Wenlin; Chi, Xiaopeng; Rao, Feng

doi:10.1016/j.mineng.2021.107213

Cited by 21 publications

(12 citation statements)

References 27 publications

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“…As presented in Figure 11B, separation peaks with a deviation of 0.40 eV for indeterminate carbon oxides (contamination) and 0.19 eV for hydrocarbons at 532.13 and 531.67 eV, respectively, were found on treated dolomite, in comparison with bare dolomite, demonstrating the adsorption of GJBW onto dolomite 55 . As exhibited in Figure 11C,D, not only did the bare dolomite attain double peaks of Ca 2p1/2 and Ca 2p3/2 at 350.78 and 347.07 eV, respectively, but it also involved the peak of Mg 1s at 1304.63 eV, being well in line with previous research 29,56 . Apart from separated peaks of Ca 2p1/2, Ca 2p3/2, and Mg 1s located at 350.68, 347.08, and 1305.38 eV, respectively, three new spectral peaks at 351.35, 347.75, and 1303.62 eV were observed on dolomite treated via GJBW.…”

Section: Resultsmentioning

confidence: 80%

“…Figure 10 delineates the species distribution over the full pH range for NaOl at a concentration of 10 mg/L 46 . At pH 5, NaOl existed mostly as RCOOH molecules, but it also generated significant amounts of RCOO − and H (RCOO) 2− ions, being prone to interacting with Ca 2+ or Mg 2+ on dolomite 29 and demonstrating that at the same concentration, GJBW could ionize more RCOO − and H (RCOO) 2− ions than could NaOl. GJBW interacts with dolomite more extensively than does NaOl.…”

Section: Resultsmentioning

confidence: 99%

“…Xie et al 28 revealed more insight into the differences in the adsorption of sodium oleate (NaOl) at varying active sites onto apatite via molecular dynamic (MD). Huang et al 29 found that the flotation of fluorapatite and dolomite by oleic acid traps could be effectively enhanced via controlling the concentration of common ions. Equally, fatty acid collectors and their complexes have been brought into operation at a great number of sites, including the An Ning plant (6.5 million tonnes/year) and the Haikou plant (2 million tonnes/year) around Dian chi in Yunnan Province, China 29 .…”

Section: Introductionmentioning

confidence: 99%

“…Huang et al 29 found that the flotation of fluorapatite and dolomite by oleic acid traps could be effectively enhanced via controlling the concentration of common ions. Equally, fatty acid collectors and their complexes have been brought into operation at a great number of sites, including the An Ning plant (6.5 million tonnes/year) and the Haikou plant (2 million tonnes/year) around Dian chi in Yunnan Province, China 29 . We have also investigated and utilized a new fatty acid‐based collector (GJBW) and achieved high flotation targets in phosphate beneficiation 30,31 .…”

Section: Introductionmentioning

confidence: 99%

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The flotation separation of apatite from dolomite using a fatty acid‐based collector and the mechanisms of adsorption

Kang

Zhang

2022

Surface & Interface Analysis

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In this work, GJBW, a fatty acid‐based agent, was used as an efficient collector to separate dolomite from apatite to achieve high‐purity apatite. The flotation performance of dolomite and apatite in the phosphate (H3PO4) system treated with sodium oleate (NaOl) and GJBW, respectively, was studied and compared. Microheat tests, surface characterization, and flotation solution chemistry calculations were used to evaluate the adsorption mechanism of GJBW onto dolomite. The smoothness and flatness of dolomite treated and untreated with GJBW may be also detected via atomic force microscopy (AFM). Microflotation results illustrated that GJBW performed better than NaOl for separating apatite from dolomite under the H3PO4 system. The grade of P2O5 in concentrates treated with 10 mg/L GJBW was 31.49%, which was 4.98% higher than that of NaOl. The recovery rate of P2O5 was 87.05%, which was 4.71% higher than that of NaOl. Microheat tests demonstrated that GJBW generated a higher heat of adsorption onto dolomite than did the same concentration of NaOl, significantly enhancing the dolomite's hydrophobicity. Fourier transform infrared spectroscopy (FTIR), zeta potential, flotation solution chemistry calculations, and surface characterization further demonstrated that GJBW may ionize large amounts of RCOO− and H (RCOO)2− ions in solution, which can be significantly chemisorbed with numerous sites of Ca and Mg exposed to dolomite, forming dense point‐like adsorption onto dolomite. These findings shed more light on the mechanism of interaction between GJBW and dolomite, which has profound implications for the study and use of fatty acid‐based treatments in phosphate ores.

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Section: Resultsmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The flotation separation of apatite from dolomite using a fatty acid‐based collector and the mechanisms of adsorption

Kang

Zhang

2022

Surface & Interface Analysis

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“…Fe and Al atoms are partly present on the dolomite surface, and the other part will enter the dolomite lattice through homogeneity and lattice substitution, which will cause impurity defects in the dolomite crystal structure. The influence of metal atoms present on the dolomite surface on its surface properties has been studied extensively by numerous authors using the zeta potential analysis, surface morphology analysis, energy spectroscopy, and determination of adsorption (Chen et al, 2022;Huang et al, 2021;Ruan et al, 2018;Wang et al, 2019). However, the influence of impurity defects on the surface properties of dolomite due to the presence of metal atoms inside the dolomite lattice is difficult to study by experimental means.…”

Section: Introductionmentioning

confidence: 99%

A first-principle study of the effect of Fe/Al impurity defects on the surface wettability of dolomite

Ao¹,

Chen²,

Cao³

et al. 2022

Physicochem. Probl. Miner. Process.

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The presence of Fe and Al atoms in large quantities in phosphate ores can significantly affect the surface properties of the minerals during flotation. In this study, the effects of Fe/Al impurities on the adsorption of H2O molecules on dolomite, including the density of states (DOS), Mulliken bond group values, and charge groups, were investigated and the adsorption energy was analyzed using density functional theory. The results show that the adsorption of H2O molecules on perfect and Fe/Alsubstituted dolomites is weak chemisorption, and the Fe and Al impurities weaken and enhance the adsorption capacity of H2O molecules, respectively. Therefore, the hydrophilicity of the dolomite surface increases in the following order: Fe-substituted dolomite < perfect dolomite < Al-substituted dolomite. The Mulliken charge and bond group analysis shows that the adsorption of H2O molecules on dolomite is primarily through the interaction between Ow and Ca atoms, where the d orbitals of Ca atoms provide charges for Ow atoms to form ionic bonds, which related to the poor electronegativity of Ca atoms and their weak valence electron binding ability. The DOS analysis shows that, during the adsorption of H2O molecules on dolomite, Mg and Al atoms have less influence on the dolomite surface, whereas Fe and Ca atoms undergo competitive adsorption, which inhibits the interaction between Ca atoms and H2O molecules on the dolomite surface.

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Selective removal of dolomite from rare earth element‐bearing phosphorite by flotation and leaching and the adsorption mechanism of agents on mineral surfaces

Xie

2023

Surface & Interface Analysis

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The rare earth elements (REEs)‐bearing phosphorite was a potential REE resource, which contained all REEs except polonium, among them lanthanide, cerium, neodymium, and yttrium were especially enriched. REEs mainly occurred in fluorapatite (Fap) and had a high positive correlation with phosphorus content. By adopting a new green environmental fatty acid collector GJBW and through one roughing and one refining reverse flotation process, all REEs were pre‐enriched. The flotation concentrate was further leached with citric acid (CA), and all REEs were further enriched. The results of X‐ray diffractometer (XRD), Fourier transform infrared spectroscopy (FT‐IR), and X‐ray photoelectron spectroscopy (XPS) showed that dolomite (Dolo) was removed and Fap was enriched in phosphorite, the selective enrichment of phosphorus and REEs was realized. Density functional theory (DFT) calculation revealed the mechanism of deep purification of REEs and phosphorus in phosphorite by CA at the micro‐scale. The results showed that the number and strength of bonding between CA and Dolo (104) surface were greater than that between CA and Fap (001) surface, and CA was more easily adsorbed on Dolo (104) surface. Under the same conditions, Dolo in phosphorite was more easily leached by CA, while Fap was further enriched. This process provided a theoretical basis for the comprehensive recovery of REEs and phosphorus from phosphorite.

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Effects of common ions on the flotation of fluorapatite and dolomite with oleate collector

Cited by 21 publications

References 27 publications

The flotation separation of apatite from dolomite using a fatty acid‐based collector and the mechanisms of adsorption

The flotation separation of apatite from dolomite using a fatty acid‐based collector and the mechanisms of adsorption

A first-principle study of the effect of Fe/Al impurity defects on the surface wettability of dolomite

Selective removal of dolomite from rare earth element‐bearing phosphorite by flotation and leaching and the adsorption mechanism of agents on mineral surfaces

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