Collect mechanisms of oleic acid on fluorite and calcite minerals

Dong, Lin; Guang-hua, Nie; Luo, Guoju; Tang, Zhaofeng

doi:10.2991/icmit-16.2016.120

Cited by 3 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some of these applications, as the production of hydrofluoric acid, require high-grade products (>97% CaF 2 , <1% SiO 2 ), and fluorite needs to be separated from gangue minerals. The technique of froth flotation is widely used, − permitting to process fine-grained and low-grade ores. However, in tungsten or phosphate ores, fluorite does not bring any added value compared to the extracted materials and its grade is too low to exploit it as a byproduct.…”

Section: Introductionmentioning

confidence: 99%

Surface Properties of Fluorite in Presence of Water: An Atomistic Investigation

et al. 2018

View full text Add to dashboard Cite

Density functional theory simulations, including a correction for dispersive interactions, were performed to investigate the adsorption of water on the main cleavage plane of the fluorite, namely, the (111) surface. In the case of a single molecule of water, we observe that the molecular form is preferred over the dissociated one, and absorbs on the surface with an energy of −55 kJ mol −1 , including a significant contribution from the dispersion forces. Also, we show that the substitution of a fluorine atom by a hydroxyl group on the surface of fluorite is not energetically favorable. Then, the hydration of the surface in function of the coverage by water molecules was studied in a systematic way. It was shown that the geometries involving the formation of a cluster of water molecules on the surface, with half of the molecules adsorbed, are the most favorable. Finally, ab initio molecular dynamics conducted at 300 K confirms the trends observed at 0 K, albeit the adsorption energies are reduced by about 10 kJ mol −1 . Also, we observe that once put in the interaction with a large number of water molecules, half of the calcium atoms at the surface are in close interaction with a water molecule, whereas the rest of the molecules are further away but present a relatively well-defined structure showing similarities with the one of water clusters.

show abstract

Section: Introductionmentioning

confidence: 99%

Surface Properties of Fluorite in Presence of Water: An Atomistic Investigation

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Rao and Forssberg [37] already indicated in their work as a mechanism for adsorption of oleate on fluorite and calcite, the monolayer coverage in the case of calcite and the formation of bilayer in the case of fluorite, followed by a precipitation of calcium soap. Lin et al [41] study the separation mechanism of fluorite and calcite with oleic acid and conclude that the results of the zeta potential confirm that the chemical adsorption of the collector on the mineral surface provides a good recovery of fluorite when the pH is close to 10 and that calcium and oleate ions in the mineral surface react form calcium oleate. Other researchers studied the zeta potential of fluorite as a function of pH in the absence and presence of a collector [4,6,[42][43][44].…”

Section: Interaction Mechanisms Of Collector and Depressants On Fluor...mentioning

confidence: 97%

Comparison Between Performance of Fluorite Flotation Under Different Depressants Reagents in Two Pieces of Laboratory Equipment

et al. 2020

View full text Add to dashboard Cite

Fluorite is an important industrial mineral composed of calcium and fluorine (CaF2). This mineral is widely distributed through different deposits. However, in most cases, fluorite is tightly associated with gangue, such as calcite and quartz. In this paper, different depressants are tested in the flotation of fluorite in two different laboratory configurations—cell and column. Quebracho tree (QT) was tested as the main depressant in combination with white dextrin (WD), potato starch (PT), carboxymethyl cellulose (CMC), and sodium hexametaphosphate (SHMP). The optimum pulp pH of the flotation of fluorite was determined as approximately 9.5–10. The best results are obtained using a combination of quebracho and white dextrin as depressants, reaching 74% of fluorite grade for modified column flotation and 70.5% for cell flotation. Additionally, the metallurgical recovery obtained higher values when the flotation was carried out in the modified column and using the same combination of depressant agents—75% for modified column flotation and 60% for flotation cell.

show abstract

“…both are floated under same conditions. Although some plants use tannin and quebrachoo under strongly alkaline conditions (pH 10-11) to depress calcite mineral but it requires multiple cleanings to minimize calcite and clean the fluorite (Lin et al 2016). Therefore, it was decided to decompose calcite before the flotation of fluorite mineral.…”

Section: Effect Of Acid Leaching Pre Treatmentmentioning

confidence: 99%

Potential of low-grade fluorite ore of Landi Kotal, Khyber Pakhtunkhwa Province, Pakistan

Bhatti

Zafar

Mehmood

et al. 2023

Bangladesh J. Sci. Ind. Res.

View full text Add to dashboard Cite

This paper describes the results of a beneficiation study conducted on low-grade fluorite ore. The study was aimed at the development of a suitable beneficiation process to produce chemical grade fluorite concentrate. The representative sample of the ore was up-graded by leaching and flotation process. The important parameters of froth flotation process were optimized to obtain highest grade and recovery of fluorite concentrate. A single-factor variation method was applied to get the optimum conditions of the process. The rougher concentrate was reground to liberate fine locked fluorite particles and two cleaning flotation were employed in close circuit to achieve higher grade concentrate. A process flowsheet was designed in the light of these tests. After optimization of process parameters, the fluorite ore containing 62.24% CaF2 could be upgraded to a concentrate assaying 97.55% CaF2 with an overall recovery of 92.73%. The prepared fluorite concentrate meets the specifications of chemical grade and is suitable for production of fluoride based chemicals. Bangladesh J. Sci. Ind. Res. 58(2), 107-118, 2023

show abstract

Collect mechanisms of oleic acid on fluorite and calcite minerals

Cited by 3 publications

References 3 publications

Surface Properties of Fluorite in Presence of Water: An Atomistic Investigation

Surface Properties of Fluorite in Presence of Water: An Atomistic Investigation

Comparison Between Performance of Fluorite Flotation Under Different Depressants Reagents in Two Pieces of Laboratory Equipment

Potential of low-grade fluorite ore of Landi Kotal, Khyber Pakhtunkhwa Province, Pakistan

Contact Info

Product

Resources

About